/* =============================================
   Quote Generator - Modern CSS Styles
   ============================================= */

/* CSS Variables */
:root {
    /* Primary Colors - User's Color Palette */
    --color-primary: #FF0000;
    --color-primary-dark: #AF0404;
    --color-bg-dark: #252525;
    --color-bg-medium: #414141;
    --color-bg-light: #1a1a1a;
    
    /* Text Colors */
    --color-text-primary: #ffffff;
    --color-text-secondary: rgba(255, 255, 255, 0.7);
    --color-text-muted: rgba(255, 255, 255, 0.5);
    
    /* Accent Colors for Dynamic Themes */
    --color-accent-1: #FF0000;
    --color-accent-2: #AF0404;
    --color-accent-3: #e74c3c;
    --color-accent-4: #c0392b;
    --color-accent-5: #d35400;
    --color-accent-6: #e67e22;
    
    /* Skeleton Colors */
    --skeleton-base: rgba(255, 255, 255, 0.1);
    --skeleton-shine: rgba(255, 255, 255, 0.2);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-card: 0 25px 80px rgba(0, 0, 0, 0.5);
    --shadow-btn: 0 4px 15px rgba(175, 4, 4, 0.4);
    --shadow-btn-hover: 0 8px 25px rgba(175, 4, 4, 0.6);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 50%;
    
    /* Fonts */
    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'Source Sans 3', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* Reset & Base Styles */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg-dark);
    color: var(--color-text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    overflow-x: hidden;
    transition: background-color var(--transition-slow);
}

/* Background Pattern */
.background-pattern {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(175, 4, 4, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 0, 0, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(65, 65, 65, 0.3) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
    transition: opacity var(--transition-slow);
}

/* Main Container */
.container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 700px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

/* Quote Card */
.quote-card {
    width: 100%;
    background: linear-gradient(145deg, var(--color-bg-medium), var(--color-bg-dark));
    border-radius: var(--radius-lg);
    padding: 3rem;
    box-shadow: var(--shadow-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    position: relative;
    overflow: hidden;
    animation: cardFadeIn 0.6s ease-out;
}

.quote-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-dark));
    transition: background var(--transition-slow);
}

@keyframes cardFadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Quote Header */
.quote-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.quote-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--color-text-primary);
    transition: transform var(--transition-medium), background var(--transition-slow);
}

.quote-icon:hover {
    transform: scale(1.1) rotate(5deg);
}

.quote-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: var(--color-text-primary);
}

/* Quote Content */
.quote-content {
    margin-bottom: 2.5rem;
}

.quote-text {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-text-primary);
    margin-bottom: 1.5rem;
    position: relative;
    min-height: 100px;
    transition: opacity var(--transition-medium);
}

.quote-text.loading {
    opacity: 0.5;
}

/* Quote Author */
.quote-author {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-family: var(--font-body);
    font-size: 1.1rem;
    font-weight: 500;
    font-style: normal;
    color: var(--color-primary);
    transition: color var(--transition-slow);
}

.author-line {
    width: 40px;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), transparent);
    transition: background var(--transition-slow);
}

.author-name {
    min-width: 150px;
}

/* Skeleton Loading Styles */
.skeleton {
    background: var(--skeleton-base);
    border-radius: var(--radius-sm);
    position: relative;
    overflow: hidden;
}

.skeleton::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        var(--skeleton-shine),
        transparent
    );
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

.skeleton-text {
    height: 1.75rem;
    width: 100%;
    margin-bottom: 0.75rem;
}

.skeleton-text.skeleton-short {
    width: 70%;
}

.skeleton-author {
    height: 1.1rem;
    width: 120px;
}

.skeleton.hidden {
    display: none;
}

/* Quote Actions */
.quote-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.action-group {
    display: flex;
    gap: 0.75rem;
}

/* Action Buttons (Icon Buttons) */
.action-btn {
    width: 48px;
    height: 48px;
    border: none;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.action-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    transform: translate(-50%, -50%);
    transition: all var(--transition-medium);
    z-index: -1;
}

.action-btn:hover {
    color: var(--color-text-primary);
    transform: translateY(-3px);
}

.action-btn:hover::before {
    width: 100%;
    height: 100%;
}

.action-btn:active {
    transform: translateY(-1px) scale(0.95);
}

.action-btn:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 3px;
}

/* X (Twitter) Button Specific */
#btn-twitter:hover::before {
    background: #000000;
}

/* Copy Button Success State */
.action-btn.copied {
    color: var(--color-text-primary);
}

.action-btn.copied::before {
    width: 100%;
    height: 100%;
    background: #27ae60;
}

/* Speaking State */
.action-btn.speaking {
    animation: pulse 1s infinite;
}

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

/* Primary Button */
.btn-primary {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: var(--shadow-btn);
    transition: all var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.2),
        transparent
    );
    transition: left var(--transition-slow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-btn-hover);
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:active {
    transform: translateY(-1px) scale(0.98);
}

.btn-primary:focus-visible {
    outline: 2px solid var(--color-text-primary);
    outline-offset: 3px;
}

.btn-primary i {
    transition: transform var(--transition-medium);
}

.btn-primary:hover i {
    transform: rotate(180deg);
}

.btn-primary.loading {
    pointer-events: none;
    opacity: 0.7;
}

.btn-primary.loading i {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* Controls Row */
.controls-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 4rem;
}

/* Language Toggle */
.language-toggle {
    display: flex;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.05);
    padding: 0.5rem;
    border-radius: var(--radius-md);
}

.lang-btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--color-text-muted);
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.lang-btn.active {
    background: var(--color-primary);
    color: var(--color-text-primary);
}

.lang-btn:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Theme Toggle */
.theme-toggle {
    width: 44px;
    height: 44px;
    border: none;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-medium);
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-text-primary);
    transform: rotate(15deg);
}

.theme-toggle:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Favorites Toggle */
.favorites-toggle {
    position: relative;
    width: 44px;
    height: 44px;
    border: none;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-medium);
}

.favorites-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #e74c3c;
}

.favorites-toggle:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.favorites-count {
    position: absolute;
    top: -4px;
    right: -4px;
    min-width: 20px;
    height: 20px;
    background: var(--color-primary);
    color: var(--color-text-primary);
    font-size: 0.7rem;
    font-weight: 700;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 5px;
    opacity: 0;
    transform: scale(0);
    transition: all var(--transition-fast);
}

.favorites-count.visible {
    opacity: 1;
    transform: scale(1);
}

/* Favorite Button Active State */
.action-btn.favorited {
    color: #e74c3c !important;
}

.action-btn.favorited::before {
    width: 100%;
    height: 100%;
    background: rgba(231, 76, 60, 0.2);
}

/* Favorites Panel */
.favorites-panel {
    position: fixed;
    top: 0;
    right: -400px;
    width: 100%;
    max-width: 400px;
    height: 100vh;
    background: var(--color-bg-medium);
    border-left: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: -10px 0 40px rgba(0, 0, 0, 0.5);
    z-index: 1001;
    transition: right var(--transition-medium);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.favorites-panel.open {
    right: 0;
}

.favorites-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    background: var(--color-bg-dark);
}

.favorites-header h2 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin: 0;
}

.close-favorites {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-text-secondary);
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.close-favorites:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-text-primary);
}

.favorites-list {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
}

.empty-favorites {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.9rem;
    padding: 2rem 1rem;
    line-height: 1.6;
}

/* Favorite Item */
.favorite-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    padding: 1rem;
    margin-bottom: 0.75rem;
    position: relative;
    transition: all var(--transition-fast);
}

.favorite-item:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.1);
}

.favorite-item-quote {
    font-family: var(--font-display);
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--color-text-primary);
    margin-bottom: 0.5rem;
}

.favorite-item-author {
    font-size: 0.8rem;
    color: var(--color-primary);
    font-weight: 500;
}

.favorite-item-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.favorite-item-btn {
    flex: 1;
    padding: 0.5rem;
    border: none;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-text-secondary);
    font-size: 0.75rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    transition: all var(--transition-fast);
}

.favorite-item-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-text-primary);
}

.favorite-item-btn.delete:hover {
    background: rgba(231, 76, 60, 0.2);
    color: #e74c3c;
}

/* Favorites Panel Overlay */
.favorites-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-medium);
}

.favorites-overlay.visible {
    opacity: 1;
    visibility: visible;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    background: var(--color-bg-medium);
    border: 1px solid rgba(39, 174, 96, 0.3);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: 0.9rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-medium);
    z-index: 1000;
}

.toast i {
    color: #27ae60;
    font-size: 1.2rem;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
    visibility: visible;
}

/* Site Footer */
.site-footer {
    position: fixed;
    bottom: 2rem;
    left: 0;
    width: 100%;
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
    z-index: 5;
}

.site-footer a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.site-footer a:hover {
    color: var(--color-text-primary);
    text-decoration: underline;
}

/* Signature Footer */
.sign {
    position: fixed;
    bottom: 0.5rem;
    left: 0;
    width: 100%;
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.8rem;
    font-family: var(--font-body);
    letter-spacing: 0.5px;
    z-index: 5;
}

.sign a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.sign a:hover {
    color: var(--color-text-primary);
}

/* Quote Text Animation */
.quote-text.fade-in {
    animation: fadeInUp 0.5s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(15px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.quote-author.fade-in {
    animation: fadeInUp 0.5s ease-out 0.15s both;
}

/* Responsive Design */
@media screen and (max-width: 768px) {
    body {
        padding: 1.5rem;
    }
    
    .quote-card {
        padding: 2rem;
    }
    
    .quote-text {
        font-size: 1.4rem;
    }
    
    .quote-title {
        font-size: 1.25rem;
    }
    
    .quote-actions {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .action-group-left {
        order: 2;
    }
    
    .action-group-right {
        order: 1;
        width: 100%;
    }
    
    .btn-primary {
        width: 100%;
        justify-content: center;
    }
}

@media screen and (max-width: 480px) {
    .quote-card {
        padding: 1.5rem;
        border-radius: var(--radius-md);
    }
    
    .quote-header {
        flex-direction: column;
        text-align: center;
        gap: 0.75rem;
    }
    
    .quote-text {
        font-size: 1.25rem;
        text-align: center;
    }
    
    .quote-author {
        justify-content: center;
    }
    
    .action-group-left {
        justify-content: center;
        width: 100%;
    }
    
    .controls-row {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .favorites-panel {
        max-width: 100%;
    }
    
    .site-footer {
        position: relative;
        margin-top: 3rem;
    }
    
    .sign {
        position: relative;
        margin-top: 0.75rem;
        padding-bottom: 1rem;
    }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .quote-card {
        border: 2px solid var(--color-text-primary);
    }
    
    .action-btn {
        border: 1px solid var(--color-text-secondary);
    }
    
    .btn-primary {
        border: 2px solid var(--color-text-primary);
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .skeleton::after {
        animation: none;
    }
}

/* Focus Visible for Keyboard Navigation */
:focus:not(:focus-visible) {
    outline: none;
}

/* Selection Styling */
::selection {
    background: var(--color-primary);
    color: var(--color-text-primary);
}

/* =============================================
   Light Mode Theme
   ============================================= */
:root[data-theme="light"] {
    /* Background Colors */
    --color-bg-dark: #f8f9fa;
    --color-bg-medium: #ffffff;
    --color-bg-light: #e9ecef;
    
    /* Text Colors */
    --color-text-primary: #1a1a1a;
    --color-text-secondary: rgba(0, 0, 0, 0.7);
    --color-text-muted: rgba(0, 0, 0, 0.5);
    
    /* Skeleton Colors */
    --skeleton-base: rgba(0, 0, 0, 0.08);
    --skeleton-shine: rgba(0, 0, 0, 0.12);
    
    /* Shadows */
    --shadow-card: 0 25px 80px rgba(0, 0, 0, 0.15);
    --shadow-btn: 0 4px 15px rgba(175, 4, 4, 0.25);
    --shadow-btn-hover: 0 8px 25px rgba(175, 4, 4, 0.35);
}

/* Light Mode Specific Overrides */
:root[data-theme="light"] .background-pattern {
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(175, 4, 4, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 0, 0, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(200, 200, 200, 0.2) 0%, transparent 70%);
}

:root[data-theme="light"] .quote-card {
    background: linear-gradient(145deg, var(--color-bg-medium), var(--color-bg-dark));
    border: 1px solid rgba(0, 0, 0, 0.08);
}

:root[data-theme="light"] .action-btn {
    background: rgba(0, 0, 0, 0.05);
    color: var(--color-text-secondary);
}

:root[data-theme="light"] .action-btn:hover {
    color: var(--color-text-primary);
}

:root[data-theme="light"] .language-toggle,
:root[data-theme="light"] .theme-toggle,
:root[data-theme="light"] .favorites-toggle {
    background: rgba(0, 0, 0, 0.05);
}

:root[data-theme="light"] .theme-toggle:hover,
:root[data-theme="light"] .favorites-toggle:hover,
:root[data-theme="light"] .language-toggle:hover {
    background: rgba(0, 0, 0, 0.1);
}

:root[data-theme="light"] .toast {
    background: var(--color-bg-medium);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(39, 174, 96, 0.2);
}

:root[data-theme="light"] .favorites-panel {
    background: var(--color-bg-medium);
    border-left: 1px solid rgba(0, 0, 0, 0.1);
    box-shadow: -10px 0 40px rgba(0, 0, 0, 0.15);
}

:root[data-theme="light"] .favorites-header {
    background: var(--color-bg-dark);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

:root[data-theme="light"] .close-favorites {
    background: rgba(0, 0, 0, 0.05);
}

:root[data-theme="light"] .close-favorites:hover {
    background: rgba(0, 0, 0, 0.1);
}

:root[data-theme="light"] .favorite-item {
    background: rgba(0, 0, 0, 0.02);
    border: 1px solid rgba(0, 0, 0, 0.08);
}

:root[data-theme="light"] .favorite-item:hover {
    background: rgba(0, 0, 0, 0.04);
    border-color: rgba(0, 0, 0, 0.12);
}

:root[data-theme="light"] .favorite-item-actions {
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

:root[data-theme="light"] .favorite-item-btn {
    background: rgba(0, 0, 0, 0.05);
}

:root[data-theme="light"] .favorite-item-btn:hover {
    background: rgba(0, 0, 0, 0.1);
}