/* ===== CSS RESET Y VARIABLES ===== */
:root {
    /* Colores tema claro */
    --primary-color: #667eea;
    --primary-dark: #5a6fd8;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --background-color: #ffffff;
    --surface-color: #f8fafc;
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --border-color: #e2e8f0;
    --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-heavy: 0 10px 25px rgba(0, 0, 0, 0.15);
    --success-color: #10b981;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    
    /* Gradientes */
    --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    --gradient-accent: linear-gradient(135deg, var(--accent-color), var(--primary-color));
    
    /* Espaciado */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Transiciones */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Tema oscuro */
[data-theme="dark"] {
    --background-color: #0f172a;
    --surface-color: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --border-color: #334155;
    --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-heavy: 0 10px 25px rgba(0, 0, 0, 0.4);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

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

/* ===== HEADER ===== */
.header {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-lg) 0;
    box-shadow: var(--shadow-medium);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo {
    font-size: 1.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo i {
    font-size: 2rem;
    animation: pulse 2s infinite;
}

.auth-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 500;
}

.auth-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-1px);
}

.theme-toggle {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 1.2rem;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

/* ===== MAIN CONTENT ===== */
.main {
    padding: var(--spacing-2xl) 0;
    min-height: calc(100vh - 100px);
}

/* ===== SEARCH SECTION ===== */
.search-section {
    background: var(--surface-color);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-medium);
    margin-bottom: var(--spacing-2xl);
    border: 1px solid var(--border-color);
}

.search-section h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
    font-size: 2rem;
    font-weight: 600;
}

.search-form {
    max-width: 600px;
    margin: 0 auto;
}

.search-input-wrapper {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.search-input {
    flex: 1;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    background: var(--background-color);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.search-input.error {
    border-color: var(--error-color);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.search-btn {
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    white-space: nowrap;
}

.search-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.search-btn:active {
    transform: translateY(0);
}

.search-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.search-filters {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.filter-select,
.sort-select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--background-color);
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-select:focus,
.sort-select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.error-message {
    background: #fef2f2;
    color: var(--error-color);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--error-color);
    display: none;
    animation: slideIn 0.3s ease;
}

[data-theme="dark"] .error-message {
    background: rgba(239, 68, 68, 0.1);
}

/* ===== TABS ===== */
.tabs {
    display: flex;
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xs);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-color);
}

.tab {
    flex: 1;
    background: transparent;
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: 500;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    position: relative;
}

.tab.active {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-light);
}

.tab:hover:not(.active) {
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary-color);
}

.tab-counter {
    background: rgba(255, 255, 255, 0.2);
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.8rem;
    font-weight: 600;
    min-width: 20px;
    text-align: center;
}

.tab.active .tab-counter {
    background: rgba(255, 255, 255, 0.3);
}

.tab.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.tab.disabled:hover {
    background: transparent;
    color: inherit;
}

/* ===== LOADING ===== */
.loading {
    text-align: center;
    padding: var(--spacing-2xl);
    display: none;
}

.loading.show {
    display: block;
    animation: fadeIn 0.3s ease;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-left: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

/* ===== CONTENT SECTIONS ===== */
.content-section {
    display: none;
    animation: fadeIn 0.3s ease;
}

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

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.section-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.clear-favorites {
    background: var(--error-color);
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.9rem;
}

.clear-favorites:hover {
    background: #dc2626;
    transform: translateY(-1px);
}

/* ===== SONGS GRID ===== */
.songs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.song-card {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
    position: relative;
}

.song-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-heavy);
}

.song-artwork {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
}

.song-info {
    padding: var(--spacing-lg);
}

.song-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.song-artist {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
}

.song-album {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: var(--spacing-md);
    font-style: italic;
}

.song-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.action-btn {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

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

.action-btn.play:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

.action-btn.favorite {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.action-btn.favorite:hover {
    color: var(--error-color);
    border-color: var(--error-color);
}

.action-btn.favorite.active {
    background: var(--error-color);
    color: white;
    border-color: var(--error-color);
}

.action-btn.favorite.active:hover {
    background: #dc2626;
}

.action-btn.favorite.disabled {
    background: transparent;
    color: var(--text-muted);
    border-color: var(--border-color);
    cursor: pointer;
    opacity: 0.7;
}

.action-btn.favorite.disabled:hover {
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary-color);
    border-color: var(--primary-color);
}

/* ===== EMPTY STATE ===== */
.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--text-secondary);
}

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

.empty-state h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

/* ===== LOAD MORE BUTTON ===== */
.load-more {
    display: block;
    margin: 0 auto;
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: var(--spacing-md) var(--spacing-2xl);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.load-more:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

/* ===== AUDIO PLAYER ===== */
.audio-player {
    position: fixed;
    bottom: -200px;
    left: 0;
    right: 0;
    background: var(--surface-color);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-heavy);
    transition: bottom var(--transition-normal);
    z-index: 200;
    backdrop-filter: blur(10px);
}

.audio-player.show {
    bottom: 0;
}

.audio-player .container {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: var(--spacing-lg);
    max-width: 1000px;
    position: relative;
}

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

.player-artwork {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    object-fit: cover;
}

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

.player-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.player-artist {
    color: var(--text-secondary);
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.player-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.control-btn {
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: 50%;
    transition: all var(--transition-fast);
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.control-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: scale(1.1);
}

.control-btn.play-pause {
    background: var(--gradient-primary);
    color: white;
    font-size: 1.4rem;
    width: 52px;
    height: 52px;
}

.control-btn.play-pause:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-medium);
}

.player-progress {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    justify-self: end;
    min-width: 200px;
}

.time-current,
.time-total {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
    min-width: 35px;
    text-align: center;
}

.progress-bar {
    flex: 1;
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 3px;
    width: 0%;
    transition: width 0.1s ease;
}

.player-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.2rem;
    padding: var(--spacing-xs);
    border-radius: 50%;
    transition: all var(--transition-fast);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.player-close:hover {
    color: var(--text-primary);
    background: var(--border-color);
}

/* ===== TOAST NOTIFICATIONS ===== */
.toast-container {
    position: fixed;
    top: 100px;
    right: var(--spacing-lg);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    background: var(--surface-color);
    color: var(--text-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-heavy);
    border-left: 4px solid var(--success-color);
    animation: slideInRight 0.3s ease;
    max-width: 300px;
    position: relative;
    border: 1px solid var(--border-color);
}

.toast.error {
    border-left-color: var(--error-color);
}

.toast.warning {
    border-left-color: var(--warning-color);
}

.toast-close {
    position: absolute;
    top: 8px;
    right: 8px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.1rem;
}

/* ===== ANIMACIONES ===== */
@keyframes spin {
    to { transform: rotate(360deg); }
}

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

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

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

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(300px); }
    to { opacity: 1; transform: translateX(0); }
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .header .container {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .search-section {
        padding: var(--spacing-lg);
    }
    
    .search-input-wrapper {
        flex-direction: column;
    }
    
    .search-filters {
        flex-direction: column;
    }
    
    .songs-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .section-header {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }
    
    .tabs {
        flex-direction: column;
    }
    
    .tab {
        justify-content: center;
    }
    
    .audio-player .container {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .player-info {
        justify-content: center;
    }
    
    .player-progress {
        justify-self: center;
    }
    
    .toast-container {
        left: var(--spacing-sm);
        right: var(--spacing-sm);
    }
    
    .toast {
        max-width: none;
    }
}

@media (max-width: 480px) {
    .search-section h2 {
        font-size: 1.5rem;
    }
    
    .logo {
        font-size: 1.5rem;
    }
    
    .song-card {
        margin: 0;
    }
    
    .song-actions {
        flex-direction: column;
    }
    
    .player-info {
        flex-direction: column;
        text-align: center;
    }
    
    .player-artwork {
        width: 80px;
        height: 80px;
    }
}

/* Botón de autenticación cuando está logueado */
.header-actions button:has(.fa-user-check) {
    background: var(--success-color);
    color: white;
    position: relative;
    overflow: hidden;
}

.header-actions button:has(.fa-user-check):hover {
    background: var(--danger-color);
    transform: translateY(-2px);
}

.header-actions button:has(.fa-user-check):hover::after {
    content: " (Cerrar sesión)";
    font-size: 0.8em;
    opacity: 0.9;
}

/* Animación sutil para el icono de logout */
.header-actions button:has(.fa-user-check) .fa-sign-out-alt {
    transition: all 0.3s ease;
    opacity: 0.7;
}

.header-actions button:has(.fa-user-check):hover .fa-sign-out-alt {
    opacity: 1;
    transform: translateX(2px);
}

/* ===== LOGOUT CONFIRMATION MODAL ===== */
.logout-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.logout-modal.show {
    opacity: 1;
    visibility: visible;
}

.logout-modal-content {
    background: var(--bg-color);
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    max-width: 420px;
    width: 90%;
    max-height: 90vh;
    overflow: auto;
    transform: scale(0.7) translateY(50px);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    border: 1px solid var(--border-color);
}

.logout-modal.show .logout-modal-content {
    transform: scale(1) translateY(0);
}

.logout-header {
    padding: 24px 24px 16px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.logout-header i {
    font-size: 2.5rem;
    color: var(--danger-color);
    margin-bottom: 12px;
    display: block;
}

.logout-header h3 {
    margin: 0;
    color: var(--text-color);
    font-size: 1.5rem;
    font-weight: 600;
}

.logout-body {
    padding: 24px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: var(--secondary-bg);
    border-radius: 12px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
}

.user-info i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.user-info span {
    font-weight: 600;
    color: var(--text-color);
    font-size: 1.1rem;
}

.logout-warning {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    background: rgba(255, 193, 7, 0.1);
    border: 1px solid var(--warning-color);
    border-radius: 12px;
    margin-bottom: 20px;
}

.logout-warning i {
    color: var(--warning-color);
    font-size: 1.2rem;
    margin-top: 2px;
    flex-shrink: 0;
}

.logout-warning p {
    margin: 0;
    color: var(--text-color);
    line-height: 1.5;
}

.logout-question {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-color);
    margin: 0;
    font-weight: 500;
}

.logout-actions {
    padding: 16px 24px 24px;
    display: flex;
    gap: 12px;
    border-top: 1px solid var(--border-color);
}

.logout-actions button {
    flex: 1;
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

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

.btn-cancel:hover {
    background: var(--border-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.btn-confirm {
    background: var(--danger-color);
    color: white;
    border: 1px solid var(--danger-color);
}

.btn-confirm:hover {
    background: #dc2626;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.btn-confirm:active {
    transform: translateY(0);
}

/* Animación de botones */
.logout-actions button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: all 0.3s ease;
}

.logout-actions button:active::before {
    width: 100px;
    height: 100px;
}

/* Responsive */
@media (max-width: 768px) {
    .logout-modal-content {
        margin: 20px;
        width: calc(100% - 40px);
    }
    
    .logout-actions {
        flex-direction: column;
    }
    
    .logout-actions button {
        width: 100%;
    }
}

/* ===== MODAL DE AUTENTICACIÓN ===== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(5px);
}

.modal-overlay.show {
    display: flex;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-heavy);
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    animation: slideIn 0.3s ease;
}

.auth-modal {
    max-width: 450px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.modal-header h3 {
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.2rem;
}

.modal-close {
    background: transparent;
    border: none;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

.modal-body {
    padding: var(--spacing-xl);
}

/* ===== FORMULARIO DE AUTENTICACIÓN ===== */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-label {
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.95rem;
}

.form-label i {
    color: var(--primary-color);
    width: 16px;
}

.form-input {
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    background: var(--background-color);
    color: var(--text-primary);
    transition: all var(--transition-fast);
    font-family: inherit;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-input.error {
    border-color: var(--error-color);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-input.valid {
    border-color: var(--success-color);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.form-input.validating {
    border-color: var(--warning-color);
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.1);
}

.form-error {
    color: var(--error-color);
    font-size: 0.85rem;
    display: none;
    padding: var(--spacing-xs) 0;
    font-weight: 500;
}

.form-error.info {
    color: var(--warning-color);
}

.form-error.show {
    display: block;
    animation: slideIn 0.2s ease;
}

.form-help {
    color: var(--text-secondary);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) 0;
}

.form-help i {
    color: var(--primary-color);
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.btn-primary,
.btn-secondary {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    min-height: 48px;
}

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

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

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

.btn-secondary:hover {
    background: var(--border-color);
    border-color: var(--text-secondary);
}

/* ===== ACCESIBILIDAD ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles para accesibilidad */
button:focus-visible,
input:focus-visible,
select:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

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

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

.hidden {
    display: none !important;
}

.fade-out {
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.3s ease;
}