/* ===== Design System - CSS Variables ===== */
:root {
    /* Primary palette */
    --color-primary: #667eea;
    --color-primary-dark: #764ba2;
    --color-primary-light: rgba(102, 126, 234, 0.1);
    --color-gradient: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);

    /* Semantic colors */
    --color-success: #28a745;
    --color-success-bg: #d4edda;
    --color-success-text: #155724;
    --color-success-border: #c3e6cb;
    --color-error: #dc3545;
    --color-error-bg: #f8d7da;
    --color-error-text: #721c24;
    --color-error-border: #f5c6cb;
    --color-warning: #ffc107;
    --color-warning-text: #856404;
    --color-info-bg: #d1ecf1;
    --color-info-text: #0c5460;
    --color-info-border: #bee5eb;

    /* Neutrals */
    --color-text: #333;
    --color-text-secondary: #666;
    --color-text-muted: #6c757d;
    --color-text-label: #555;
    --color-bg: #f8f9fa;
    --color-bg-white: #ffffff;
    --color-border: #ddd;
    --color-border-light: #f0f0f0;
    --color-border-input: #ddd;
    --color-shadow: rgba(0, 0, 0, 0.2);
    --color-shadow-light: rgba(0, 0, 0, 0.1);

    /* Grid item colors (siga-brilho) */
    --color-grid-0: #ff0000; /* Circulo - Vermelho */
    --color-grid-1: #0066ff; /* Quadrado - Azul */
    --color-grid-2: #00cc00; /* Triangulo - Verde */
    --color-grid-3: #ffcc00; /* Estrela - Dourado */
    --color-grid-4: #ff6699; /* Coracao - Rosa */
    --color-grid-5: #9966ff; /* Losango - Roxo */
    --color-grid-6: #ff9900; /* Triangulo invertido - Laranja */
    --color-grid-7: #00cccc; /* Losango alt - Ciano */
    --color-grid-8: #666666; /* Espada - Cinza escuro */

    /* Typography */
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 0.9rem;
    --font-size-lg: 1.2rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 3rem;

    /* Spacing */
    --space-xs: 5px;
    --space-sm: 10px;
    --space-md: 15px;
    --space-lg: 20px;
    --space-xl: 30px;
    --space-2xl: 40px;

    /* Border radius */
    --radius-sm: 5px;
    --radius-md: 8px;
    --radius-lg: 10px;
    --radius-xl: 15px;
    --radius-pill: 20px;

    /* Grid item sizes */
    --grid-item-size: 120px;
    --grid-item-size-tablet: 80px;
    --grid-item-size-mobile: 70px;
    --grid-item-font: 3.75rem;
    --grid-item-font-tablet: 3.125rem;
    --grid-item-font-mobile: 2.5rem;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Focus ring */
    --focus-ring: 0 0 0 3px var(--color-primary-light);
    --focus-ring-color: var(--color-primary);
}

/* Reset e estilos base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background: var(--color-gradient);
    color: var(--color-text);
    min-height: 100vh;
    line-height: 1.6;
}

/* Accessibility: reduced motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Focus visible for keyboard navigation */
:focus-visible {
    outline: 2px solid var(--focus-ring-color);
    outline-offset: 2px;
}

/* Skip link for screen readers */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: var(--space-sm) var(--space-lg);
    z-index: 9999;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-lg);
    min-height: 100vh;
}

/* Header */
.header {
    text-align: center;
    color: white;
    margin-bottom: var(--space-2xl);
}

.header h1 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-sm);
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.header h1 .subtitle {
    display: block;
    font-size: 0.5em;
    margin-top: 8px;
    font-weight: 400;
    opacity: 0.95;
}

.header p {
    font-size: var(--font-size-lg);
    opacity: 0.9;
}

/* Cards */
.card {
    background: var(--color-bg-white);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    box-shadow: 0 10px 30px var(--color-shadow);
    margin-bottom: var(--space-lg);
}

/* Formulário de sessão */
.session-setup {
    max-width: 500px;
    margin: 0 auto;
}

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

.form-group label {
    display: block;
    margin-bottom: var(--space-xs);
    font-weight: 600;
    color: var(--color-text-label);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--color-border-input);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    transition: border-color var(--transition-base);
    background: var(--color-bg-white);
    color: var(--color-text);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
    line-height: 1.5;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: var(--focus-ring);
}

/* Botões */
.btn-primary {
    background: var(--color-primary);
    color: white;
    border: none;
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: background-color var(--transition-base);
    width: 100%;
}

.btn-primary:hover {
    background: #5068d0;
}

.btn-primary:focus-visible {
    box-shadow: var(--focus-ring);
}

.btn-secondary {
    background: var(--color-text-muted);
    color: white;
    border: none;
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: background-color var(--transition-base);
    width: 100%;
    margin: var(--space-xs);
}

.btn-secondary:hover {
    background: #545b62;
}

.btn-secondary:focus-visible {
    box-shadow: var(--focus-ring);
}

/* Hub de jogos */
.session-info {
    background: rgba(255,255,255,0.9);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-xl);
    text-align: center;
}

.session-info h3 {
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
}

.games-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.game-card {
    background: var(--color-bg-white);
    border-radius: var(--radius-xl);
    padding: 25px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: 0 5px 15px var(--color-shadow-light);
    position: relative;
}

.game-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px var(--color-shadow);
}

.game-card:focus-visible {
    box-shadow: var(--focus-ring);
}

.game-card.completed:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(39, 174, 96, 0.3);
}

.game-icon {
    font-size: 4rem;
    margin-bottom: var(--space-md);
}

.game-card h3 {
    color: var(--color-text);
    margin-bottom: var(--space-sm);
    font-size: var(--font-size-xl);
}

.game-card p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    margin-bottom: var(--space-md);
}

.game-status {
    position: absolute;
    top: 15px;
    right: 15px;
}

.status-badge {
    padding: 4px 12px;
    border-radius: var(--radius-pill);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
}

.status-badge.pending {
    background: var(--color-warning);
    color: var(--color-warning-text);
}

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

.session-actions {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    flex-wrap: nowrap;
}

.session-actions button {
    font-size: 14px;
    padding: 10px 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 0;
    width: auto;
    white-space: nowrap;
}

/* Game específico */
.game-container {
    background: var(--color-bg-white);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    box-shadow: 0 10px 30px var(--color-shadow);
}

.game-header {
    margin-bottom: var(--space-xl);
}

.game-header h1 {
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.game-info {
    display: flex;
    justify-content: space-around;
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    margin-bottom: var(--space-xl);
}

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

.info-item .label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xs);
}

.info-item .value {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-text);
}

/* Grid de jogo */
.game-grid {
    display: grid;
    gap: var(--space-md);
    justify-content: center;
    margin: var(--space-xl) 0;
}

.grid-3x3 {
    grid-template-columns: repeat(3, var(--grid-item-size));
}

.grid-2x3 {
    grid-template-columns: repeat(3, var(--grid-item-size));
    grid-template-rows: repeat(2, var(--grid-item-size));
}

.grid-item {
    width: var(--grid-item-size);
    height: var(--grid-item-size);
    border: 3px solid var(--color-border);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-base);
    background: var(--color-bg-white);
    position: relative;
    font-size: var(--grid-item-font);
}

.grid-item:hover {
    border-color: var(--color-primary);
    transform: scale(1.05);
}

.grid-item:focus-visible {
    box-shadow: var(--focus-ring);
    border-color: var(--color-primary);
}

.grid-item.active {
    background: #fff3cd;
    border-color: var(--color-warning);
    box-shadow: 0 0 20px rgba(255, 193, 7, 0.5);
    animation: glow 1s ease-in-out;
}

/* Cores individuais para cada figura geométrica quando ativa */
.grid-item.active[data-index="0"] { color: var(--color-grid-0); }
.grid-item.active[data-index="1"] { color: var(--color-grid-1); }
.grid-item.active[data-index="2"] { color: var(--color-grid-2); }
.grid-item.active[data-index="3"] { color: var(--color-grid-3); }
.grid-item.active[data-index="4"] { color: var(--color-grid-4); }
.grid-item.active[data-index="5"] { color: var(--color-grid-5); }
.grid-item.active[data-index="6"] { color: var(--color-grid-6); }
.grid-item.active[data-index="7"] { color: var(--color-grid-7); }
.grid-item.active[data-index="8"] { color: var(--color-grid-8); }

.grid-item.correct {
    background: var(--color-success-bg);
    border-color: var(--color-success);
}

.grid-item.incorrect {
    background: var(--color-error-bg);
    border-color: var(--color-error);
}

@keyframes glow {
    0%, 100% { 
        box-shadow: 0 0 20px rgba(255, 193, 7, 0.5); 
    }
    50% { 
        box-shadow: 0 0 30px rgba(255, 193, 7, 0.8); 
    }
}

/* Mensagens de feedback */
.message {
    padding: var(--space-md);
    border-radius: var(--radius-lg);
    margin: var(--space-lg) 0;
    font-weight: 600;
    text-align: center;
}

.message[role="alert"] {
    /* Ensure screen readers announce status messages */
}

.message.success {
    background: var(--color-success-bg);
    color: var(--color-success-text);
    border: 1px solid var(--color-success-border);
}

.message.error {
    background: var(--color-error-bg);
    color: var(--color-error-text);
    border: 1px solid var(--color-error-border);
}

.message.info {
    background: var(--color-info-bg);
    color: var(--color-info-text);
    border: 1px solid var(--color-info-border);
}

/* Instruções */
.instructions {
    background: #e9ecef;
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-xl);
    text-align: left;
}

.instructions h3 {
    color: #495057;
    margin-bottom: var(--space-sm);
}

.instructions p {
    color: var(--color-text-muted);
    margin-bottom: 0;
}

/* Modal overlay */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
}

.modal-overlay[aria-hidden="false"] {
    display: block;
}

.modal-body {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
}

/* Wizard form steps */
.wizard-steps {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
    padding: var(--space-md) 0;
}

.wizard-step {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-text-muted);
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.wizard-step-number {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--color-border);
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: var(--font-size-sm);
    transition: all var(--transition-base);
}

.wizard-step.active .wizard-step-number {
    background: var(--color-primary);
    color: white;
}

.wizard-step.active {
    color: var(--color-primary);
}

.wizard-step.completed .wizard-step-number {
    background: var(--color-success);
    color: white;
}

.wizard-step.completed {
    color: var(--color-success);
}

.wizard-step-line {
    width: 40px;
    height: 2px;
    background: var(--color-border);
}

.wizard-step.completed + .wizard-step-line,
.wizard-step.active + .wizard-step-line {
    background: var(--color-primary);
}

.wizard-panel {
    display: none;
}

.wizard-panel.active {
    display: block;
}

.wizard-nav {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

.wizard-nav button {
    flex: 1;
}

/* Responsividade */
@media (max-width: 768px) {
    .container {
        padding: var(--space-sm);
    }

    .header h1 {
        font-size: var(--font-size-2xl);
    }

    .header p {
        font-size: 1rem;
    }

    .games-grid {
        grid-template-columns: 1fr;
    }

    .game-info {
        flex-direction: column;
        gap: var(--space-sm);
    }

    .grid-item {
        width: var(--grid-item-size-tablet);
        height: var(--grid-item-size-tablet);
        font-size: var(--grid-item-font-tablet);
    }

    .grid-item[class*="figure-"] {
        background-size: 80%;
    }

    .grid-3x3 {
        grid-template-columns: repeat(3, var(--grid-item-size-tablet));
    }

    .grid-2x3 {
        grid-template-columns: repeat(3, var(--grid-item-size-tablet));
        grid-template-rows: repeat(2, var(--grid-item-size-tablet));
    }

    .wizard-steps {
        gap: var(--space-sm);
    }

    .wizard-step-line {
        width: 20px;
    }
}

@media (max-width: 480px) {
    .card {
        padding: var(--space-lg);
    }

    .grid-item {
        width: var(--grid-item-size-mobile);
        height: var(--grid-item-size-mobile);
        font-size: var(--grid-item-font-mobile);
    }

    .grid-item[class*="figure-"] {
        background-size: 85%;
    }

    .grid-3x3 {
        grid-template-columns: repeat(3, var(--grid-item-size-mobile));
    }

    .grid-2x3 {
        grid-template-columns: repeat(3, var(--grid-item-size-mobile));
        grid-template-rows: repeat(2, var(--grid-item-size-mobile));
    }

    .wizard-steps {
        flex-direction: column;
        align-items: flex-start;
    }

    .wizard-step-line {
        display: none;
    }
}

/* Animações */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

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

.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}