/* ======================
   IMPORTS & RESET
   ====================== */
@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@300;400;600;700&family=Poppins:wght@600;700;800&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

/* ======================
   CSS VARIABLES
   ====================== */
:root {
    /* Colors */
    --primary: #FF1493;
    --primary-dark: #D4106A;
    --primary-light: #FF69B4;
    --background: #0a0a0a;
    --surface: #1a1a1a;
    --surface-light: #252525;
    --surface-lighter: #2f2f2f;
    --text: #ffffff;
    --text-secondary: #999999;
    --text-tertiary: #666666;
    --success: #4CAF50;
    --error: #f44336;
    --border: rgba(255, 255, 255, 0.08);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(255, 20, 147, 0.3);
}

/* ======================
   BASE STYLES
   ====================== */
body {
    font-family: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--background);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    font-weight: 400;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    line-height: 1.2;
}

/* ======================
   LOADING SCREEN
   ====================== */
.loading {
    position: fixed;
    inset: 0;
    background: var(--background);
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading.active {
    display: flex;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--surface-light);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading p {
    margin-top: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ======================
   SCREENS & LAYOUT
   ====================== */
.screen {
    display: none;
    min-height: 100vh;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--background);
    z-index: 1;
}

.screen.active {
    display: block;
    position: relative;
}

.centered-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--spacing-lg);
    text-align: center;
}

/* ======================
   MODALS
   ====================== */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.92);
    backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--spacing-sm);
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: modalSlideIn 0.3s ease;
}

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

.btn-close {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: var(--surface-light);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.btn-close:hover {
    background: var(--surface-lighter);
    color: var(--text);
}

.modal-content h2 {
    text-align: center;
    color: var(--primary);
    margin-bottom: var(--spacing-md);
    font-size: 1.75rem;
}

.modal-content p {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.modal-body h3 {
    color: var(--primary);
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    font-size: 1.1rem;
}

.modal-body p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
    text-align: left;
}

/* ======================
   AGE VERIFICATION
   ====================== */
.age-icon {
    font-size: 4rem;
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.success-modal {
    text-align: center;
}

.success-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-sm);
    animation: bounce 0.6s ease;
}

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

.success-subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: var(--spacing-sm);
}

/* ======================
   BUTTONS
   ====================== */
.btn {
    padding: 0.875rem 1.75rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    min-height: 52px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    font-family: 'Nunito', sans-serif;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, transparent, rgba(255,255,255,0.1), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s;
}

.btn:hover::before {
    transform: translateX(100%);
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 16px rgba(255, 20, 147, 0.3);
}

.btn-primary:hover {
    box-shadow: 0 6px 24px rgba(255, 20, 147, 0.4);
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--surface-light);
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--surface-lighter);
}

.btn-block {
    width: 100%;
}

.button-group {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.button-group .btn {
    flex: 1;
}

.btn-icon {
    background: var(--surface-light);
    border: 1px solid var(--border);
    color: var(--text);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.btn-icon:hover {
    background: var(--surface-lighter);
    transform: scale(1.05);
}

.icon {
    width: 24px;
    height: 24px;
    stroke-width: 2;
}

/* ======================
   AUTH SCREEN
   ====================== */
#auth-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm);
}

.auth-container {
    width: 100%;
    max-width: 420px;
}

.logo-container {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.logo {
    font-size: 2.75rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
}

.tagline {
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
    font-size: 1rem;
}

.auth-form {
    display: none;
    background: var(--surface);
    border: 1px solid var(--border);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
}

.auth-form.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.auth-form h2 {
    text-align: center;
    margin-bottom: var(--spacing-md);
    font-size: 1.5rem;
}

/* ======================
   FORMS
   ====================== */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    font-size: 0.95rem;
}

.form-group input {
    width: 100%;
    padding: 0.875rem;
    background: var(--surface-light);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text);
    font-size: 1rem;
    font-family: 'Nunito', sans-serif;
    transition: var(--transition);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--surface-lighter);
}

.form-group small {
    display: block;
    margin-top: var(--spacing-xs);
    color: var(--text-tertiary);
    font-size: 0.85rem;
}

.form-group.checkbox {
    display: flex;
    align-items: flex-start;
}

.form-group.checkbox input {
    width: auto;
    margin-right: var(--spacing-xs);
    margin-top: 0.25rem;
    cursor: pointer;
}

.form-group.checkbox label {
    margin: 0;
    font-weight: normal;
    font-size: 0.9rem;
    cursor: pointer;
}

.form-switch {
    text-align: center;
    margin-top: var(--spacing-md);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.form-switch a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.form-switch a:hover {
    color: var(--primary-light);
}

/* ======================
   APP HEADER
   ====================== */
.app-header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background: rgba(26, 26, 26, 0.9);
}

.app-title {
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
}

/* ======================
   DROPDOWN MENU
   ====================== */
.dropdown-menu {
    position: fixed;
    top: 73px;
    right: 0;
    width: 340px;
    max-width: calc(100vw - 2rem);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl) 0 0 var(--radius-xl);
    box-shadow: var(--shadow-lg);
    transform: translateX(100%);
    transition: transform var(--transition);
    z-index: 99;
    max-height: calc(100vh - 88px);
    overflow-y: auto;
}

.dropdown-menu.active {
    transform: translateX(0);
}

.dropdown-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border);
}

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

.user-avatar {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(255, 20, 147, 0.3);
}

.user-details {
    flex: 1;
    min-width: 0;
}

.user-email {
    font-weight: 600;
    font-size: 0.95rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-order {
    color: var(--text-tertiary);
    font-size: 0.85rem;
    margin-top: 0.125rem;
}

.dropdown-section {
    padding: var(--spacing-xs) 0;
}

.dropdown-item {
    width: 100%;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: none;
    border: none;
    color: var(--text);
    cursor: pointer;
    transition: var(--transition-fast);
    text-align: left;
    font-size: 1rem;
    font-family: 'Nunito', sans-serif;
}

.dropdown-item:hover {
    background: var(--surface-light);
}

.dropdown-item:active {
    background: var(--surface-lighter);
}

.dropdown-item .icon {
    color: var(--text-secondary);
}

.dropdown-divider {
    height: 1px;
    background: var(--border);
    margin: var(--spacing-xs) 0;
}

.dropdown-footer {
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    border-top: 1px solid var(--border);
}

.dropdown-link {
    background: none;
    border: none;
    color: var(--text-tertiary);
    font-size: 0.85rem;
    cursor: pointer;
    padding: 0;
    font-family: 'Nunito', sans-serif;
    transition: var(--transition-fast);
}

.dropdown-link:hover {
    color: var(--primary);
}

.dropdown-separator {
    color: var(--text-tertiary);
}

/* ======================
   APP MAIN
   ====================== */
.app-main {
    padding: var(--spacing-lg) var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.game-section {
    display: none;
}

.game-section.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

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

.welcome-section h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
    background: linear-gradient(135deg, var(--text), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.welcome-section p {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

/* ======================
   GAMES GRID
   ====================== */
.games-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

@media (min-width: 640px) {
    .games-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.game-card {
    background: var(--surface);
    border: 1px solid var(--border);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.game-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent, rgba(255, 20, 147, 0.05));
    opacity: 0;
    transition: opacity var(--transition);
}

.game-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(255, 20, 147, 0.2);
}

.game-card:hover::before {
    opacity: 1;
}

.game-card:active {
    transform: translateY(-2px);
}

.game-card-emoji {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-sm);
    position: relative;
    z-index: 1;
}

.game-card-title {
    font-size: 1.4rem;
    margin-bottom: var(--spacing-xs);
    position: relative;
    z-index: 1;
}

.game-card-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.5;
    position: relative;
    z-index: 1;
}

.game-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border);
    position: relative;
    z-index: 1;
}

.plays-remaining {
    font-size: 0.9rem;
    color: var(--primary);
    font-weight: 600;
}

/* ======================
   GAME INTRO
   ====================== */
.game-intro {
    text-align: center;
    padding: var(--spacing-lg) var(--spacing-md);
    max-width: 600px;
    margin: 0 auto;
}

.game-intro-emoji {
    font-size: 5rem;
    margin-bottom: var(--spacing-md);
    animation: float 3s ease-in-out infinite;
}

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

.game-intro h2 {
    font-size: 2.25rem;
    margin-bottom: var(--spacing-sm);
}

.game-intro-description {
    color: var(--text-secondary);
    font-size: 1.15rem;
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.game-rules {
    background: var(--surface);
    border: 1px solid var(--border);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-lg);
    text-align: left;
}

.game-rules h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-md);
    font-size: 1.3rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.game-rules ul {
    list-style: none;
    padding: 0;
}

.game-rules li {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
}

.game-rules li:last-child {
    border-bottom: none;
}

.game-rules li::before {
    content: "✓";
    color: var(--primary);
    font-weight: bold;
    flex-shrink: 0;
    font-size: 1.1rem;
}

.plays-info {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
}

.plays-count {
    color: var(--primary);
    font-weight: 700;
    font-size: 1.3rem;
}

/* ======================
   CHALLENGE CARD
   ====================== */
.card-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-md);
    min-height: 60vh;
}

.challenge-card {
    width: 100%;
    max-width: 360px;
    aspect-ratio: 2/3;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    box-shadow: 0 12px 48px rgba(255, 20, 147, 0.4);
    position: relative;
    overflow: hidden;
    border: 2px solid rgba(255, 255, 255, 0.1);
}

.challenge-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255,255,255,0.15) 50%, transparent 70%);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.card-categoria {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(10px);
    padding: 0.375rem 1rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.card-emoji {
    font-size: 5.5rem;
    margin-bottom: var(--spacing-md);
    filter: drop-shadow(0 6px 12px rgba(0,0,0,0.4));
    position: relative;
    z-index: 1;
}

.card-texto {
    font-size: 1.35rem;
    line-height: 1.65;
    font-weight: 600;
    position: relative;
    z-index: 1;
}

.card-placeholder {
    font-size: 8rem;
    opacity: 0.6;
    position: relative;
    z-index: 1;
}

.challenge-card.randomizing {
    animation: cardFlip 0.1s ease-in-out infinite;
}

@keyframes cardFlip {
    0%, 100% { transform: rotateY(0deg); }
    50% { transform: rotateY(10deg); }
}

.card-actions {
    width: 100%;
    max-width: 360px;
    margin-top: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.btn-back-game {
    background: var(--surface-light);
    color: var(--text);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

/* ======================
   TOAST NOTIFICATIONS
   ====================== */
#toast-container {
    position: fixed;
    bottom: var(--spacing-md);
    left: var(--spacing-md);
    right: var(--spacing-md);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    pointer-events: none;
}

.toast {
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    animation: slideUp 0.3s ease;
    pointer-events: auto;
    backdrop-filter: blur(10px);
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.toast.success {
    border-left: 3px solid var(--success);
}

.toast.error {
    border-left: 3px solid var(--error);
}

/* ======================
   RESPONSIVE
   ====================== */
@media (max-width: 640px) {
    .app-main {
        padding: var(--spacing-md) var(--spacing-sm);
    }
    
    .challenge-card {
        max-width: 320px;
    }
    
    .card-texto {
        font-size: 1.15rem;
    }
    
    .game-intro-emoji {
        font-size: 4rem;
    }
    
    .games-grid {
        gap: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .modal-content {
        padding: var(--spacing-md);
    }
    
    .auth-form {
        padding: var(--spacing-md);
    }
    
    .game-card {
        padding: var(--spacing-md);
    }
}