/**
 * Estilos Modernos do Sistema de Dama Bet
 * Design Profissional, Mobile-First, Responsivo
 * Cores: Azul (#007bff), Verde (#28a745), Tons Neutros
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Cores Principais - Profissionais e Confiáveis */
    --primary: #007bff;
    --primary-dark: #0056b3;
    --primary-light: #66b3ff;
    --success: #28a745;
    --success-dark: #1e7e34;
    --success-light: #71dd8a;
    --danger: #dc3545;
    --warning: #ffc107;
    
    /* Tons Neutros */
    --white: #ffffff;
    --gray-50: #f8f9fa;
    --gray-100: #e9ecef;
    --gray-200: #dee2e6;
    --gray-300: #ced4da;
    --gray-400: #adb5bd;
    --gray-500: #6c757d;
    --gray-600: #495057;
    --gray-700: #343a40;
    --gray-800: #212529;
    --gray-900: #1a1d20;
    
    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Espaçamentos */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Bordas */
    --radius-sm: 0.25rem;
    --radius: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Transições */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #e9ecef 100%);
    color: var(--gray-800);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Container para página do jogo - permite layout mais largo */
main.container {
    max-width: 100%;
    padding: var(--spacing-md);
}

@media (min-width: 1400px) {
    main.container {
        max-width: 1400px;
        margin: 0 auto;
    }
}

/* Header Moderno */
.main-header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--gray-200);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex: 1;
    min-width: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    white-space: nowrap;
}

.logo-icon {
    flex-shrink: 0;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    gap: 4px;
    z-index: 1002;
}

.menu-toggle span {
    width: 24px;
    height: 3px;
    background: var(--gray-700);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.main-nav a {
    color: var(--gray-700);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius);
    transition: var(--transition);
    position: relative;
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--primary);
    background: var(--gray-50);
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

#login-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

#login-section .btn {
    margin: 0;
    flex-shrink: 0;
}

.user-saldo {
    font-weight: 600;
    color: var(--success);
    background: var(--gray-50);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius);
}

.user-nome {
    font-weight: 500;
    color: var(--gray-700);
}

/* Botões Modernos */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 0.9375rem;
    font-weight: 600;
    text-decoration: none;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    font-family: inherit;
}

.btn-primary {
    background: var(--primary);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-success {
    background: var(--success);
    color: var(--white);
}

.btn-success:hover {
    background: var(--success-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: var(--white);
}

/* Backward Compatibility - Old Button Classes */
.btn-branco {
    background: var(--white);
    color: var(--gray-800);
    border: 2px solid var(--gray-300);
}

.btn-branco:hover {
    background: var(--gray-50);
    border-color: var(--gray-400);
}

.btn-azul {
    background: var(--primary);
    color: var(--white);
}

.btn-azul:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-verde {
    background: var(--success);
    color: var(--white);
}

.btn-verde:hover {
    background: var(--success-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-vermelho {
    background: var(--danger);
    color: var(--white);
}

.btn-vermelho:hover {
    background: #c82333;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-laranja {
    background: #ff9800;
    color: var(--white);
}

.btn-laranja:hover {
    background: #f57c00;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
}

.btn-small {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.875rem;
}

.btn-block {
    width: 100%;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: var(--spacing-3xl) var(--spacing-md);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.05"><path d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/></g></g></svg>');
    opacity: 0.1;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-lg);
    font-size: 0.875rem;
    font-weight: 600;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-description {
    font-size: clamp(1rem, 2vw, 1.25rem);
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.9;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.checkers-preview {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

.checker-board-preview {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 2px;
    width: 320px;
    height: 320px;
    max-width: 100%;
}

.preview-cell {
    aspect-ratio: 1;
    position: relative;
}

.preview-cell.dark {
    background: #8b4513;
}

.preview-cell.light {
    background: #f5deb3;
}

.preview-piece {
    width: 80%;
    height: 80%;
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.preview-piece.black {
    background: radial-gradient(circle at 30% 30%, #555, #000);
}

.preview-piece.white {
    background: radial-gradient(circle at 30% 30%, #fff, #ccc);
}

/* Animações infinitas para as peças */
.animated-piece {
    animation: pieceFloat 3s ease-in-out infinite;
}

.animated-piece:nth-child(odd) {
    animation-delay: 0s;
}

.animated-piece:nth-child(even) {
    animation-delay: 1.5s;
}

@keyframes pieceFloat {
    0%, 100% {
        transform: translate(-50%, -50%) translateY(0);
    }
    50% {
        transform: translate(-50%, -50%) translateY(-8px);
    }
}

/* Animações para ícones */
.animated-icon {
    animation: iconPulse 2s ease-in-out infinite;
}

.animated-icon svg {
    animation: iconRotate 4s linear infinite;
}

@keyframes iconPulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.9;
    }
}

@keyframes iconRotate {
    0% {
        transform: rotate(0deg);
    }
    25% {
        transform: rotate(5deg);
    }
    50% {
        transform: rotate(0deg);
    }
    75% {
        transform: rotate(-5deg);
    }
    100% {
        transform: rotate(0deg);
    }
}

/* Animações para textos */
.animated-text {
    animation: textGlow 3s ease-in-out infinite;
}

@keyframes textGlow {
    0%, 100% {
        text-shadow: 0 0 5px rgba(0, 123, 255, 0.3);
    }
    50% {
        text-shadow: 0 0 15px rgba(0, 123, 255, 0.6), 0 0 25px rgba(0, 123, 255, 0.4);
    }
}

/* Responsividade para o tabuleiro preview */
@media (max-width: 768px) {
    .checker-board-preview {
        width: 240px;
        height: 240px;
    }
}

@media (max-width: 480px) {
    .checker-board-preview {
        width: 200px;
        height: 200px;
    }
    
    .header-container {
        padding: var(--spacing-sm);
        gap: var(--spacing-xs);
    }
    
    #login-section {
        gap: 6px;
    }
    
    .user-info .btn {
        padding: 6px var(--spacing-sm);
        font-size: 0.8125rem;
    }
}

/* Main Content */
.main-content {
    padding: var(--spacing-3xl) var(--spacing-md);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
}

/* Game Modes Section */
.game-modes-section {
    margin-bottom: var(--spacing-3xl);
}

.game-modes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    max-width: 1000px;
    margin: 0 auto;
}

.game-mode-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    text-align: center;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
}

.game-mode-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        /* Peças de damas (círculos) */
        url("data:image/svg+xml,%3Csvg width='50' height='50' viewBox='0 0 50 50' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23d0d0d0' fill-opacity='0.12'%3E%3Ccircle cx='25' cy='25' r='12'/%3E%3C/g%3E%3C/svg%3E"),
        /* Dados (quadrados com pontos) */
        url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' stroke='%23d0d0d0' stroke-opacity='0.1' stroke-width='1.5'%3E%3Crect x='8' y='8' width='44' height='44' rx='5'/%3E%3Ccircle cx='20' cy='20' r='2' fill='%23d0d0d0' fill-opacity='0.15'/%3E%3Ccircle cx='30' cy='30' r='2' fill='%23d0d0d0' fill-opacity='0.15'/%3E%3Ccircle cx='40' cy='40' r='2' fill='%23d0d0d0' fill-opacity='0.15'/%3E%3C/g%3E%3C/svg%3E"),
        /* Tabuleiro de damas */
        url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23d0d0d0' fill-opacity='0.08'%3E%3Crect x='0' y='0' width='20' height='20'/%3E%3Crect x='20' y='20' width='20' height='20'/%3E%3C/g%3E%3C/svg%3E");
    background-size: 70px 70px, 90px 90px, 50px 50px;
    background-position: 0 0, 35px 35px, 15px 15px;
    opacity: 0.4;
    z-index: 0;
    pointer-events: none;
}

.game-mode-card > * {
    position: relative;
    z-index: 1;
}

.game-mode-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.card-computer {
    border-color: var(--primary);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
}

.card-computer:hover {
    border-color: var(--primary-dark);
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
    transform: translateY(-4px) scale(1.02);
}

.card-computer .card-title,
.card-computer .card-description,
.card-computer .card-features li {
    color: var(--white);
}

.card-computer .card-features svg {
    color: rgba(255, 255, 255, 0.9);
}

.card-player {
    border-color: var(--success);
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: var(--white);
}

.card-player:hover {
    border-color: var(--success-dark);
    background: linear-gradient(135deg, #f5576c 0%, #f093fb 100%);
    transform: translateY(-4px) scale(1.02);
}

.card-player .card-title,
.card-player .card-description,
.card-player .card-features li {
    color: var(--white);
}

.card-player .card-features svg {
    color: rgba(255, 255, 255, 0.9);
}

.card-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-computer .card-icon {
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(10px);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.card-player .card-icon {
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(10px);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: var(--spacing-md);
}

.card-description {
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.card-features {
    list-style: none;
    text-align: left;
    margin-bottom: var(--spacing-xl);
}

.card-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    color: var(--gray-700);
}

.card-features svg {
    color: var(--success);
    flex-shrink: 0;
}

/* Features Section */
.features-section {
    margin-bottom: var(--spacing-3xl);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.feature-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card:nth-child(1) {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
}

.feature-card:nth-child(1) h3,
.feature-card:nth-child(1) p {
    color: var(--white);
}

.feature-card:nth-child(2) {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: var(--white);
}

.feature-card:nth-child(2) h3,
.feature-card:nth-child(2) p {
    color: var(--white);
}

.feature-card:nth-child(3) {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: var(--white);
}

.feature-card:nth-child(3) h3,
.feature-card:nth-child(3) p {
    color: var(--white);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        /* Peças de damas pretas */
        url("data:image/svg+xml,%3Csvg width='45' height='45' viewBox='0 0 45 45' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23c0c0c0' fill-opacity='0.1'%3E%3Ccircle cx='22.5' cy='22.5' r='10'/%3E%3C/g%3E%3C/svg%3E"),
        /* Peças de damas brancas */
        url("data:image/svg+xml,%3Csvg width='50' height='50' viewBox='0 0 50 50' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' stroke='%23c0c0c0' stroke-opacity='0.12' stroke-width='2'%3E%3Ccircle cx='25' cy='25' r='11'/%3E%3C/g%3E%3C/svg%3E"),
        /* Dados */
        url("data:image/svg+xml,%3Csvg width='55' height='55' viewBox='0 0 55 55' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' stroke='%23c0c0c0' stroke-opacity='0.1' stroke-width='1.5'%3E%3Crect x='7' y='7' width='41' height='41' rx='4'/%3E%3Ccircle cx='18' cy='18' r='1.5' fill='%23c0c0c0' fill-opacity='0.12'/%3E%3Ccircle cx='27.5' cy='27.5' r='1.5' fill='%23c0c0c0' fill-opacity='0.12'/%3E%3Ccircle cx='37' cy='37' r='1.5' fill='%23c0c0c0' fill-opacity='0.12'/%3E%3C/g%3E%3C/svg%3E");
    background-size: 65px 65px, 75px 75px, 85px 85px;
    background-position: 0 0, 32px 32px, 16px 16px;
    opacity: 0.35;
    z-index: 0;
    pointer-events: none;
}

.feature-card > * {
    position: relative;
    z-index: 1;
}

.feature-card:hover {
    transform: translateY(-4px) scale(1.03);
    box-shadow: var(--shadow-xl);
}

.feature-card:nth-child(1):hover {
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
}

.feature-card:nth-child(2):hover {
    background: linear-gradient(135deg, #f5576c 0%, #f093fb 100%);
}

.feature-card:nth-child(3):hover {
    background: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    color: rgba(255, 255, 255, 0.95);
    font-size: 0.9375rem;
}

/* Championships Section */
.championships-section {
    margin-bottom: var(--spacing-3xl);
}

.championship-card {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    color: var(--white);
    box-shadow: var(--shadow-xl);
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
}

.championship-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        /* Troféu */
        url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' stroke='%23ffffff' stroke-opacity='0.12' stroke-width='2'%3E%3Cpath d='M30 8 L35 20 L50 20 L38 28 L43 45 L30 38 L17 45 L22 28 L10 20 L25 20 Z'/%3E%3C/g%3E%3C/svg%3E"),
        /* Peças de damas */
        url("data:image/svg+xml,%3Csvg width='50' height='50' viewBox='0 0 50 50' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23ffffff' fill-opacity='0.08'%3E%3Ccircle cx='25' cy='25' r='12'/%3E%3C/g%3E%3C/svg%3E"),
        /* Dados */
        url("data:image/svg+xml,%3Csvg width='45' height='45' viewBox='0 0 45 45' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' stroke='%23ffffff' stroke-opacity='0.1' stroke-width='1.5'%3E%3Crect x='6' y='6' width='33' height='33' rx='4'/%3E%3Ccircle cx='15' cy='15' r='1.5' fill='%23ffffff' fill-opacity='0.1'/%3E%3Ccircle cx='22.5' cy='22.5' r='1.5' fill='%23ffffff' fill-opacity='0.1'/%3E%3Ccircle cx='30' cy='30' r='1.5' fill='%23ffffff' fill-opacity='0.1'/%3E%3C/g%3E%3C/svg%3E"),
        /* Tabuleiro */
        url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23ffffff' fill-opacity='0.06'%3E%3Crect x='0' y='0' width='20' height='20'/%3E%3Crect x='20' y='20' width='20' height='20'/%3E%3C/g%3E%3C/svg%3E");
    background-size: 90px 90px, 70px 70px, 60px 60px, 50px 50px;
    background-position: 0 0, 45px 45px, 22px 22px, 15px 15px;
    opacity: 0.6;
    z-index: 0;
    pointer-events: none;
}

.championship-card > * {
    position: relative;
    z-index: 1;
}

.championship-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-lg);
    font-size: 0.875rem;
    font-weight: 600;
}

.championship-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.championship-description {
    font-size: 1.125rem;
    opacity: 0.95;
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.championship-features {
    list-style: none;
    margin-bottom: var(--spacing-xl);
}

.championship-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    opacity: 0.95;
}

.championship-features svg {
    flex-shrink: 0;
}

/* Dashboard Section */
.dashboard-section {
    margin-bottom: var(--spacing-3xl);
}

.dashboard-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-lg);
    border: 2px solid var(--primary);
    max-width: 800px;
    margin: 0 auto;
}

.dashboard-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.dashboard-icon {
    width: 64px;
    height: 64px;
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.dashboard-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

.dashboard-subtitle {
    color: var(--gray-600);
}

.dashboard-features {
    list-style: none;
    margin-bottom: var(--spacing-xl);
}

.dashboard-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    color: var(--gray-700);
}

.dashboard-features svg {
    color: var(--success);
    flex-shrink: 0;
}

/* Login CTA Section */
.login-cta-section {
    margin-bottom: var(--spacing-3xl);
}

.login-cta-card {
    background: linear-gradient(135deg, var(--success) 0%, var(--success-dark) 100%);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    color: var(--white);
    box-shadow: var(--shadow-xl);
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.login-cta-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-cta-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.login-cta-description {
    font-size: 1.125rem;
    opacity: 0.95;
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.login-cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Footer */
.main-footer {
    background: var(--gray-800);
    color: var(--gray-300);
    padding: var(--spacing-2xl) var(--spacing-md);
    margin-top: var(--spacing-3xl);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3,
.footer-section h4 {
    color: var(--white);
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
}

.footer-section p {
    font-size: 0.9375rem;
    line-height: 1.6;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: var(--gray-300);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section a:hover {
    color: var(--white);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--gray-700);
    font-size: 0.875rem;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--white);
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--gray-200);
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-800);
}

.close {
    font-size: 2rem;
    font-weight: 300;
    color: var(--gray-500);
    cursor: pointer;
    line-height: 1;
    transition: var(--transition);
}

.close:hover {
    color: var(--gray-800);
}

.modal-content form {
    padding: var(--spacing-lg);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--gray-700);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

/* Responsive Design - Mobile First */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }
    
    .main-nav {
        position: fixed;
        top: 0;
        left: -100%;
        width: 280px;
        height: 100vh;
        background: var(--white);
        box-shadow: var(--shadow-xl);
        transition: var(--transition);
        z-index: 1001;
        padding: var(--spacing-xl);
        overflow-y: auto;
    }
    
    .main-nav.active {
        left: 0;
    }
    
    .main-nav ul {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
    
    .main-nav a {
        width: 100%;
        padding: var(--spacing-md);
    }
    
    .user-info {
        flex-direction: row;
        align-items: center;
        width: auto;
        justify-content: flex-end;
        gap: var(--spacing-xs);
    }
    
    #login-section {
        gap: var(--spacing-xs);
        flex-wrap: nowrap;
    }
    
    .user-info .btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.875rem;
        white-space: nowrap;
        flex: 0 0 auto;
        min-width: auto;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
    }
    
    .hero-stats {
        gap: var(--spacing-lg);
    }
    
    .game-modes-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .login-cta-buttons {
        flex-direction: column;
    }
    
    .login-cta-buttons .btn {
        width: 100%;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

/* Tablet Styles (481px - 1023px) */
@media (min-width: 481px) and (max-width: 1023px) {
    .header-container {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    #login-section {
        gap: var(--spacing-sm);
    }
    
    .user-info .btn {
        padding: var(--spacing-xs) var(--spacing-md);
        font-size: 0.875rem;
    }
}

@media (min-width: 769px) {
    .hero-container {
        grid-template-columns: 1fr 1fr;
    }
    
    .hero-content {
        text-align: left;
    }
    
    .hero-stats {
        justify-content: flex-start;
    }
}

/* Game-specific styles - Layout Responsivo */
main.container .game-container {
    max-width: 100%;
    padding: 0;
}

.game-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    width: 100%;
    margin: 0;
    padding: 0;
    max-height: calc(100vh - 120px);
    overflow: hidden;
}

@media (min-width: 1024px) {
    .game-container {
        flex-direction: row;
        align-items: flex-start;
        gap: var(--spacing-md);
        max-height: calc(100vh - 100px);
    }
}

.board-container {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    min-width: 0;
    width: 100%;
    overflow: visible;
    max-height: 100%;
}

@media (min-width: 1024px) {
    .board-container {
        width: auto;
        flex: 1;
        min-width: 0;
        max-height: calc(100vh - 150px + 189px); /* +5cm altura = 189px */
        padding-left: calc(var(--spacing-md) + 227px); /* +6cm esquerda = 227px */
        padding-right: calc(var(--spacing-md) + 227px); /* +6cm direita = 227px */
    }
    
    .board {
        max-width: min(calc(900px + 454px), calc(100vh - 180px + 189px)); /* +12cm largura (6cm cada lado) = 454px, +5cm altura = 189px */
        max-height: calc(100vh - 130px + 189px); /* +5cm altura (4cm baixo + 1cm cima) = 189px */
    }
}

#game-board {
    width: 100%;
    max-width: 100%;
    margin: 0 auto;
}

/* Board Wrapper - Container principal do tabuleiro com coordenadas */
/* Tabuleiro principal */
.board {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
        gap: 0;
    border: 3px solid var(--gray-800);
    border-radius: var(--radius);
    overflow: hidden;
        width: 100%;
    max-width: 100%;
    max-height: calc(100vh - 180px + 189px); /* +5cm (4cm baixo + 1cm cima) = 189px */
    aspect-ratio: 1;
    margin: 0 auto;
    object-fit: contain;
}

@media (min-width: 1024px) {
    .board {
        max-width: min(calc(900px + 454px), calc(100vh - 180px + 189px)); /* +12cm (6cm cada lado) = 454px, +5cm altura = 189px */
        max-height: calc(100vh - 130px + 189px); /* +5cm (4cm baixo + 1cm cima) = 189px */
    }
}

/* Game Info Panel */
.game-info-panel {
        width: 100%;
    max-width: 100%;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

@media (min-width: 1024px) {
    .game-info-panel {
        width: 320px;
        max-width: 320px;
        flex-shrink: 0;
        margin: 0;
        position: sticky;
        top: 100px;
        max-height: calc(100vh - 100px);
        overflow-y: visible;
    }
}

.game-header {
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px solid var(--gray-200);
    margin-bottom: var(--spacing-xs);
}

.game-header h3 {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-600);
    margin: 0;
    text-transform: lowercase;
    letter-spacing: 0.5px;
}

/* Players Info */
.players-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
}

.player-semicard {
    background: transparent;
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs);
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.player-semicard.active {
    border-color: var(--primary);
    background: rgba(0, 123, 255, 0.03);
}

.player-header-minimal {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: 2px;
}

.player-number-minimal {
    background: var(--primary);
    color: var(--white);
    width: 20px;
    height: 20px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.6875rem;
    font-weight: 600;
    flex-shrink: 0;
}

.player-name-minimal {
    flex: 1;
    font-weight: 500;
    color: var(--gray-700);
    font-size: 0.8125rem;
}

.time-indicator-minimal {
    font-size: 0.75rem;
    color: var(--gray-400);
    flex-shrink: 0;
    opacity: 0.6;
}

.player-semicard.active .time-indicator-minimal {
    color: var(--primary);
    opacity: 1;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.player-stats-minimal {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
    flex-wrap: wrap;
}

.stat-pieces {
    display: flex;
    align-items: center;
    gap: 4px;
    font-weight: 500;
    color: var(--gray-600);
    font-size: 0.75rem;
}

.stat-pieces::before {
    content: '●';
    font-size: 0.5rem;
    color: var(--gray-400);
}

.stat-time {
    display: flex;
    align-items: center;
    gap: 4px;
}

.time-value {
    font-family: 'Courier New', monospace;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--gray-700);
    background: transparent;
    padding: 0;
    border-radius: 0;
    min-width: auto;
        text-align: left;
    }
    
/* Game Actions */
.game-actions {
    display: flex;
    gap: var(--spacing-sm);
        flex-wrap: wrap;
    margin-bottom: var(--spacing-sm);
}

/* History Section */
.history-section {
    border-top: 1px solid var(--gray-200);
    padding-top: var(--spacing-xs);
    margin-bottom: 0;
}

.history-tabs {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
    border-bottom: 1px solid var(--gray-200);
}

.tab-btn {
    background: transparent;
    border: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--gray-500);
    cursor: pointer;
    border-bottom: 1px solid transparent;
    margin-bottom: -1px;
    transition: var(--transition);
    text-transform: lowercase;
    font-family: inherit;
}

.tab-btn:hover {
    color: var(--gray-700);
}

.tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    font-weight: 500;
}

.history-content {
    min-height: 120px;
    max-height: 160px;
    overflow-y: auto;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.history-log,
.chat-log {
    min-height: 80px;
    max-height: 160px;
    overflow-y: auto;
    padding: var(--spacing-xs);
    background: transparent;
    border-radius: 0;
    font-size: 0.75rem;
    line-height: 1.4;
    margin-bottom: 0;
}

.history-log p,
.chat-log p {
    margin: var(--spacing-xs) 0;
    color: var(--gray-700);
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
}

.chat-log p {
    background: var(--white);
    margin-bottom: var(--spacing-sm);
}

.chat-input {
    display: flex;
    gap: var(--spacing-sm);
}

.chat-input input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-family: inherit;
}

.chat-input input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

/* Game Status Info */
.game-status-info {
    border-top: 1px solid var(--gray-200);
    padding-top: var(--spacing-md);
}

.game-status-info #match-info {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--gray-50);
    border-radius: var(--radius);
    font-size: 0.875rem;
}

.game-status-info #match-info p {
    margin: var(--spacing-xs) 0;
    color: var(--gray-700);
}

/* Responsive Game Layout */
@media (max-width: 1023px) {
    .game-container {
        flex-direction: column;
    }
    
    .game-info-panel {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .game-container {
        padding: var(--spacing-md);
        gap: var(--spacing-md);
    }
    
    .board-container {
        padding: var(--spacing-sm);
    }
    
    #game-board {
        max-width: 100%;
    }
    
    .board {
        width: 100%;
        max-width: 100%;
    }
    
    .player-stats-minimal {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .history-log,
    .chat-log {
        max-height: 200px;
    }
    }
    
    .cell {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    cursor: pointer;
    transition: var(--transition);
    min-width: 0;
}

.cell.dark,
.cell.black {
    background: #8b4513;
}

.cell.light,
.cell.white {
    background: #f5deb3;
}

.cell.selected {
    background: var(--primary) !important;
    box-shadow: inset 0 0 0 3px var(--white);
}

.cell.possible-move {
    background: var(--success) !important;
    box-shadow: inset 0 0 0 2px var(--white);
    }
    
    .piece {
    width: 80%;
    height: 80%;
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    transition: var(--transition);
}

.piece.black {
    background: radial-gradient(circle at 30% 30%, #555, #000);
}

.piece.white {
    background: radial-gradient(circle at 30% 30%, #fff, #ccc);
}

.piece.dama,
.piece.king {
    border: 3px solid gold;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3), 0 0 8px rgba(255, 215, 0, 0.5);
    position: relative;
}

.piece.dama::after,
.piece.king::after {
    content: '♔';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.2em;
    color: #FFD700;
    text-shadow: 
        0 2px 4px rgba(0, 0, 0, 0.9),
        0 0 8px rgba(255, 215, 0, 0.8);
    font-weight: bold;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
}

.piece.moving {
    transform: scale(1.2);
    z-index: 10;
}

/* Game Over Overlay */
.game-over-overlay {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    margin: 0 !important;
    padding: var(--spacing-md) !important;
    background: rgba(0, 0, 0, 0.8) !important;
    backdrop-filter: blur(4px);
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    z-index: 9999 !important;
    box-sizing: border-box !important;
}

.game-over-content {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    text-align: center;
    max-width: 500px;
    width: calc(100% - 2rem);
    margin: 0 auto;
    box-shadow: var(--shadow-xl);
    animation: modalSlideIn 0.3s ease-out;
    position: relative;
    z-index: 10000;
}

.trophy-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    animation: bounce 1s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.game-over-content h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: var(--spacing-md);
}

.game-over-buttons {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

.game-over-buttons .btn {
    flex: 1;
    min-width: 120px;
}

#confetti-canvas {
    position: absolute;
    top: 0;
    left: 0;
        width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

/* Status Messages */
.status {
    padding: var(--spacing-md);
    border-radius: var(--radius);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

.status.playing {
    background: var(--primary-light);
    color: var(--primary-dark);
}

.status.waiting {
    background: var(--warning);
    color: var(--gray-800);
}

.status.finished {
    background: var(--success-light);
    color: var(--success-dark);
}

/* Generic Card Styles (for backward compatibility) */
.card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow);
    margin-bottom: var(--spacing-lg);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card h1,
.card h2,
.card h3 {
    color: var(--gray-800);
    margin-bottom: var(--spacing-md);
}

.card h1 {
    font-size: 2rem;
    font-weight: 700;
}

.card h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

.card h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.card p {
    color: var(--gray-600);
    margin-bottom: var(--spacing-md);
}

.card ul {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.card ul li {
    padding: var(--spacing-sm) 0;
    color: var(--gray-700);
    position: relative;
    padding-left: var(--spacing-lg);
}

.card ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
}

/* Alert Styles */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid;
}

.alert-success {
    background: var(--success-light);
    color: var(--success-dark);
    border-color: var(--success);
}

.alert-error {
    background: #fee;
    color: var(--danger);
    border-color: var(--danger);
}

.alert-info {
    background: var(--primary-light);
    color: var(--primary-dark);
    border-color: var(--primary);
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border-color: var(--warning);
}

/* Badge Styles */
.badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-success {
    background: var(--success);
    color: var(--white);
}

.badge-primary {
    background: var(--primary);
    color: var(--white);
}

/* Utility Classes */
.text-center {
        text-align: center;
    }
    
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

/* Confetti Animation */
.confetti-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 2000;
}

.confetti {
    position: absolute;
    width: 10px;
    height: 10px;
    background: var(--primary);
    animation: confettiFall linear infinite;
}

@keyframes confettiFall {
    to {
        transform: translateY(100vh) rotate(360deg);
        opacity: 0;
    }
}

/* Table Styles - Modern and Responsive */
table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-lg) 0;
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
}

table thead {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
}

table th {
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--gray-200);
    color: var(--gray-700);
}

table tbody tr {
    transition: var(--transition);
}

table tbody tr:hover {
    background: var(--gray-50);
}

table tbody tr:last-child td {
    border-bottom: none;
}

/* Responsive Table */
@media (max-width: 768px) {
    table {
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    table thead,
    table tbody,
    table tr,
    table td,
    table th {
        display: block;
    }
    
    table thead {
        display: none;
    }
    
    table tr {
        margin-bottom: var(--spacing-md);
        border: 1px solid var(--gray-200);
        border-radius: var(--radius);
        padding: var(--spacing-md);
        background: var(--white);
    }
    
    table td {
        border: none;
        padding: var(--spacing-sm) 0;
        text-align: right;
        position: relative;
        padding-left: 50%;
    }
    
    table td::before {
        content: attr(data-label);
        position: absolute;
        left: 0;
        width: 45%;
        padding-right: var(--spacing-sm);
        text-align: left;
        font-weight: 600;
        color: var(--gray-600);
    }
}

/* Loading Spinner */
.loading {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--gray-600);
    font-size: 1.125rem;
}

.loading::after {
    content: '...';
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
    0%, 20% {
        content: '.';
    }
    40% {
        content: '..';
    }
    60%, 100% {
        content: '...';
    }
}

/* Button Groups */
.btn-group {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
}

.btn-group .btn {
    flex: 1;
    min-width: 120px;
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
    border-top: 4px solid var(--primary);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-card-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.stat-card-label {
    color: var(--gray-600);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-3xl);
    color: var(--gray-600);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.empty-state-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--spacing-sm);
}

.empty-state-description {
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
}

/* Admin Sidebar Styles */
.admin-layout {
    display: flex;
    min-height: calc(100vh - 80px);
    gap: var(--spacing-lg);
}

.admin-sidebar {
    width: 240px;
    background: var(--white);
    box-shadow: var(--shadow);
    padding: var(--spacing-lg) 0;
    position: sticky;
    top: 80px;
    height: calc(100vh - 80px);
    overflow-y: auto;
    border-radius: var(--radius-lg);
    margin: var(--spacing-lg);
}

.sidebar-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-menu-item {
    margin: var(--spacing-xs) 0;
}

.sidebar-menu-link {
    display: flex;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--gray-700);
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border-left: 3px solid transparent;
    font-size: 0.9375rem;
}

.sidebar-menu-link:hover {
    background: var(--gray-50);
    color: var(--primary);
    border-left-color: var(--primary);
}

.sidebar-menu-link.active {
    background: rgba(0, 123, 255, 0.1);
    color: var(--primary);
    border-left-color: var(--primary);
    font-weight: 600;
}

.sidebar-menu-link .icon {
    margin-right: var(--spacing-md);
    font-size: 1.2rem;
    width: 24px;
    text-align: center;
}

.admin-content {
    flex: 1;
    padding: var(--spacing-lg);
    min-width: 0;
}

@media (max-width: 768px) {
    .admin-layout {
        flex-direction: column;
    }
    
    .admin-sidebar {
        width: 100%;
        position: relative;
        top: 0;
        height: auto;
        margin: 0;
        border-radius: 0;
    }
    
    .admin-content {
        padding: var(--spacing-md);
    }
}

/* Page Header Styles */
.page-header {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    padding: var(--spacing-xl) var(--spacing-md);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
}

.page-header h1 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.page-header p {
    opacity: 0.95;
    font-size: 1.125rem;
}

/* Filter/Button Groups */
.filter-group {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.filter-group .btn {
    flex: 1;
    min-width: 120px;
}

/* Match/Championship Cards */
.match-card,
.championship-card-item {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border-left: 4px solid var(--primary);
}

.match-card:hover,
.championship-card-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.match-card-header,
.championship-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.match-card-title,
.championship-card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-800);
    margin: 0;
}

.match-card-status,
.championship-card-status {
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.match-card-status.em_andamento,
.championship-card-status.em_andamento {
    background: var(--primary-light);
    color: var(--primary-dark);
}

.match-card-status.finalizado,
.championship-card-status.finalizado {
    background: var(--success-light);
    color: var(--success-dark);
}

.match-card-info,
.championship-card-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.match-card-info-item,
.championship-card-info-item {
    display: flex;
    flex-direction: column;
}

.match-card-info-label,
.championship-card-info-label {
    font-size: 0.75rem;
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-xs);
}

.match-card-info-value,
.championship-card-info-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-800);
}

/* Form Improvements */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.form-group textarea {
        width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
    resize: vertical;
    min-height: 120px;
}

.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-top: var(--spacing-md);
}

.action-buttons .btn {
    flex: 1;
    min-width: 100px;
}

/* Success/Error Messages */
.message {
    padding: var(--spacing-md);
    border-radius: var(--radius);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.message-success {
    background: var(--success-light);
    color: var(--success-dark);
    border-left: 4px solid var(--success);
}

.message-error {
    background: #fee;
    color: var(--danger);
    border-left: 4px solid var(--danger);
}

.message-info {
    background: var(--primary-light);
    color: var(--primary-dark);
    border-left: 4px solid var(--primary);
}

/* Championship Cards Minimalist */
#championships-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.championship-card-minimal {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.championship-card-minimal:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.champ-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--gray-200);
}

.champ-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-800);
    margin: 0;
    flex: 1;
    min-width: 150px;
}

.champ-status {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.champ-status-open {
    background: var(--success-light);
    color: var(--success-dark);
}

.champ-status-active {
    background: var(--primary-light);
    color: var(--primary-dark);
}

.champ-status-finished {
    background: var(--gray-200);
    color: var(--gray-600);
}

.champ-badge-registered {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius);
    background: var(--success-light);
    color: var(--success-dark);
}

.champ-info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
}

.champ-info-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.champ-label {
    font-size: 0.75rem;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.champ-value {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--gray-800);
}

.champ-prizes {
    display: flex;
    justify-content: space-around;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--gray-50);
    border-radius: var(--radius);
    margin: var(--spacing-sm) 0;
}

.champ-prize-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.champ-prize-medal {
        font-size: 1.5rem;
    }
    
.champ-prize-value {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-800);
}

.champ-action {
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--gray-200);
}

.btn-champ-register {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.9375rem;
}

.champ-registered-text {
    display: block;
    text-align: center;
    font-size: 0.875rem;
    color: var(--success-dark);
    font-weight: 500;
    padding: var(--spacing-sm);
}

.champ-login-text {
    display: block;
    text-align: center;
    font-size: 0.875rem;
    color: var(--gray-500);
    padding: var(--spacing-sm);
}

/* Responsive Championship Cards */
@media (max-width: 768px) {
    #championships-list {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .champ-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .champ-title {
        width: 100%;
    }
    
    .champ-info-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .champ-prizes {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .champ-prize-item {
        flex-direction: row;
        justify-content: space-between;
        padding: var(--spacing-sm);
        background: var(--white);
        border-radius: var(--radius);
    }
}

@media (max-width: 480px) {
    .championship-card-minimal {
        padding: var(--spacing-md);
    }
    
    .champ-title {
        font-size: 1.125rem;
    }
}

/* Match Cards Minimalist */
#matches-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.match-card-minimal {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.match-card-minimal:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.match-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--gray-200);
}

.match-type {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.match-type-icon {
    font-size: 1rem;
}

.match-type-text {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.match-status {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.match-status-active {
    background: var(--primary-light);
    color: var(--primary-dark);
}

.match-status-finished {
    background: var(--success-light);
    color: var(--success-dark);
}

.match-status-waiting {
    background: var(--gray-200);
    color: var(--gray-600);
}

.match-championship {
    font-size: 0.875rem;
    color: var(--gray-600);
    font-weight: 500;
}

.match-players {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--gray-800);
    text-align: center;
    padding: var(--spacing-xs);
    background: var(--gray-50);
    border-radius: var(--radius);
}

.match-winner {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--success-dark);
    text-align: center;
    padding: var(--spacing-xs);
    background: var(--success-light);
    border-radius: var(--radius);
}

.match-info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) 0;
}

.match-info-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.match-label {
    font-size: 0.75rem;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.match-value {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--gray-800);
}

.match-board-container {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-xs);
    background: var(--gray-50);
    border-radius: var(--radius);
    margin: var(--spacing-xs) 0;
}

.match-board-preview {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}

.match-board-preview .board {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 0;
    border: 1px solid #8b4513;
    border-radius: var(--radius);
    overflow: hidden;
    width: 100%;
    max-width: 180px;
}

.match-board-preview .cell {
    aspect-ratio: 1;
    min-width: 15px;
    min-height: 15px;
}

.match-board-preview .piece {
    width: 70%;
    height: 70%;
}

.match-action {
    padding-top: var(--spacing-xs);
    border-top: 1px solid var(--gray-200);
}

.btn-match-play {
    width: 100%;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.8125rem;
}

/* Responsive Match Cards */
@media (max-width: 1200px) {
    #matches-list {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    #matches-list {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
    
    .match-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .match-info-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .match-board-container {
        margin-top: var(--spacing-sm);
    }
    
    .match-card-minimal {
        padding: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    #matches-list {
        grid-template-columns: 1fr;
    }
    
    .match-card-minimal {
        padding: var(--spacing-md);
    }
    
    .match-players {
        font-size: 1rem;
    }
    
    .match-board-preview .board {
        max-width: 200px;
    }
}

/* Championship Sections and Bracket */
.championship-section {
    margin-bottom: var(--spacing-2xl);
    padding: var(--spacing-lg);
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
}

.championship-section h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--primary);
}

.championship-matches {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.individual-matches-section {
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-lg);
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
}

.individual-matches-section h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--primary);
}

/* Bracket Styles */
.bracket-championship {
    margin-bottom: var(--spacing-2xl);
    padding: var(--spacing-lg);
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
}

.bracket-championship h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--primary);
}

.bracket-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
}

.bracket-round {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.bracket-round h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: var(--spacing-sm);
    text-align: center;
    padding: var(--spacing-sm);
    background: var(--white);
    border-radius: var(--radius);
    border: 1px solid var(--gray-300);
}

.bracket-matches {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.bracket-match {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background: var(--white);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    transition: var(--transition);
}

.bracket-match:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.bracket-match.finished {
    background: var(--success-light);
    border-color: var(--success);
}

.bracket-player {
    padding: var(--spacing-sm);
    background: var(--gray-50);
    border-radius: var(--radius);
    font-weight: 500;
    color: var(--gray-800);
    text-align: center;
}

.bracket-player.winner {
    background: var(--success-light);
    color: var(--success-dark);
    font-weight: 600;
}

.bracket-vs {
    text-align: center;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-500);
    padding: var(--spacing-xs) 0;
}

/* Responsive Bracket */
@media (max-width: 768px) {
    .championship-matches {
        grid-template-columns: 1fr;
    }
    
    .bracket-matches {
        grid-template-columns: 1fr;
    }
    
    .bracket-container {
        padding: var(--spacing-md);
    }
}