/* ============================================
   AI Media Studio - Design System & Styles
   ============================================ */

/* CSS Custom Properties */
:root {
    /* Colors - Dark Theme (Default) */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --bg-elevated: #22222e;
    --bg-glass: rgba(26, 26, 37, 0.8);

    /* Accent Colors */
    --accent-primary: #8b5cf6;
    --accent-secondary: #06b6d4;
    --accent-gradient: linear-gradient(135deg, #8b5cf6 0%, #06b6d4 100%);
    --accent-glow: rgba(139, 92, 246, 0.4);

    /* Text Colors */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    /* Status Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;

    /* Borders & Shadows */
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-accent: rgba(139, 92, 246, 0.3);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(139, 92, 246, 0.3);

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

/* Light Theme */
[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --bg-elevated: #e2e8f0;
    --bg-glass: rgba(255, 255, 255, 0.9);

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;

    --border-subtle: rgba(0, 0, 0, 0.08);
    --border-accent: rgba(139, 92, 246, 0.4);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.15);
}

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

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

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Background Effects */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(139, 92, 246, 0.15), transparent),
        radial-gradient(ellipse 60% 40% at 100% 0%, rgba(6, 182, 212, 0.1), transparent);
    pointer-events: none;
    z-index: -1;
}

[data-theme="light"] body::before {
    background:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(139, 92, 246, 0.08), transparent),
        radial-gradient(ellipse 60% 40% at 100% 0%, rgba(6, 182, 212, 0.05), transparent);
}

/* Theme Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xs) var(--space-sm);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-base);
}

.theme-toggle:hover {
    border-color: var(--accent-primary);
}

.theme-toggle-icon {
    width: 20px;
    height: 20px;
    color: var(--text-secondary);
    transition: all var(--transition-base);
}

.theme-toggle-icon.active {
    color: var(--accent-primary);
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 {
    font-size: 2.25rem;
}

h2 {
    font-size: 1.75rem;
}

h3 {
    font-size: 1.25rem;
}

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

a:hover {
    color: var(--accent-secondary);
}

/* ============================================
   Layout Components
   ============================================ */

.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* Header */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    padding: var(--space-md) 0;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-lg);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: var(--accent-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    -webkit-text-fill-color: white;
}

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

/* Main Layout */
.main {
    padding: var(--space-xl) 0;
    min-height: calc(100vh - 80px);
}

/* Tab Navigation */
.tabs {
    display: flex;
    gap: var(--space-sm);
    background: var(--bg-secondary);
    padding: var(--space-xs);
    border-radius: var(--radius-lg);
    width: fit-content;
    margin: 0 auto var(--space-2xl);
}

.tab-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.tab-btn:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.tab-btn.active {
    color: var(--text-primary);
    background: var(--accent-gradient);
    box-shadow: var(--shadow-glow);
}

.tab-btn svg {
    width: 20px;
    height: 20px;
}

/* Tab Content */
.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

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

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Studio Layout */
.studio {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
}

.studio-panel {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    transition: border-color var(--transition-base);
}

.studio-panel:hover {
    border-color: var(--border-accent);
}

.panel-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.panel-title svg {
    width: 24px;
    height: 24px;
    color: var(--accent-primary);
}

/* ============================================
   Form Components
   ============================================ */

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

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-muted);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-md) center;
    background-size: 20px;
    padding-right: 48px;
    cursor: pointer;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: var(--shadow-sm);
}

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

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

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-elevated);
    border-color: var(--border-accent);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover:not(:disabled) {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.btn-icon {
    width: 44px;
    height: 44px;
    padding: 0;
    border-radius: var(--radius-md);
}

.btn svg {
    width: 20px;
    height: 20px;
}

.btn-block {
    width: 100%;
}

/* File Upload */
.upload-zone {
    border: 2px dashed var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.upload-zone:hover {
    border-color: var(--accent-primary);
    background: rgba(139, 92, 246, 0.05);
}

.upload-zone.dragover {
    border-color: var(--accent-primary);
    background: rgba(139, 92, 246, 0.1);
    transform: scale(1.02);
}

.upload-zone.has-file {
    border-style: solid;
    border-color: var(--accent-primary);
}

.upload-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--space-md);
    color: var(--text-muted);
}

.upload-text {
    color: var(--text-secondary);
    margin-bottom: var(--space-xs);
}

.upload-hint {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.upload-input {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

.upload-preview {
    max-width: 100%;
    max-height: 200px;
    border-radius: var(--radius-md);
    margin-top: var(--space-md);
}

/* ============================================
   Results Grid
   ============================================ */

.results-section {
    margin-top: var(--space-2xl);
}

.results-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.result-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

.result-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.result-media {
    position: relative;
    aspect-ratio: 1;
    background: var(--bg-elevated);
}

.result-media img,
.result-media video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.result-actions {
    padding: var(--space-md);
    display: flex;
    gap: var(--space-sm);
}

.result-actions .btn {
    flex: 1;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--space-2xl);
    color: var(--text-muted);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    margin-bottom: var(--space-md);
    opacity: 0.5;
}

/* ============================================
   Modal
   ============================================ */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
    padding: var(--space-lg);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 480px;
    padding: var(--space-xl);
    transform: scale(0.95);
    transition: transform var(--transition-base);
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.modal-icon {
    width: 64px;
    height: 64px;
    background: var(--accent-gradient);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-lg);
    font-size: 2rem;
}

.modal-title {
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
}

.modal-description {
    color: var(--text-secondary);
}

.modal-footer {
    margin-top: var(--space-xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.modal-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ============================================
   Loading & Progress
   ============================================ */

.loading-overlay {
    position: absolute;
    inset: 0;
    background: var(--bg-glass);
    backdrop-filter: blur(4px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    border-radius: inherit;
    z-index: 10;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border-subtle);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-text {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin: var(--space-md) 0;
}

.progress-fill {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
    animation: progressPulse 2s ease-in-out infinite;
}

@keyframes progressPulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.7;
    }
}

/* Status Badge */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-md);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-full);
}

.status-badge.generating {
    background: rgba(139, 92, 246, 0.2);
    color: var(--accent-primary);
}

.status-badge.success {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success);
}

.status-badge.error {
    background: rgba(239, 68, 68, 0.2);
    color: var(--error);
}

/* ============================================
   Toast Notifications
   ============================================ */

.toast-container {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    z-index: 300;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(100%);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

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

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

/* ============================================
   Mode Toggles
   ============================================ */

.mode-toggle {
    display: flex;
    gap: var(--space-xs);
    background: var(--bg-tertiary);
    padding: var(--space-xs);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
}

.mode-btn {
    flex: 1;
    padding: var(--space-sm) var(--space-md);
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.mode-btn:hover {
    color: var(--text-primary);
}

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

/* ============================================
   Prompt Suggestions
   ============================================ */

.suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-sm);
}

.suggestion-chip {
    padding: var(--space-xs) var(--space-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.suggestion-chip:hover {
    background: var(--bg-elevated);
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

/* ============================================
   Responsive Styles
   ============================================ */

@media (max-width: 1024px) {
    .studio {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --space-lg: 1rem;
        --space-xl: 1.5rem;
        --space-2xl: 2rem;
    }

    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .header-content {
        flex-wrap: wrap;
    }

    .tabs {
        width: 100%;
        justify-content: center;
    }

    .tab-btn {
        padding: var(--space-sm) var(--space-md);
        font-size: 0.875rem;
    }

    .tab-btn span {
        display: none;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

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

    .modal {
        max-width: 100%;
    }

    .toast-container {
        left: var(--space-md);
        right: var(--space-md);
    }

    .toast {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }

    .logo span {
        display: none;
    }

    .studio-panel {
        padding: var(--space-lg);
    }

    .upload-zone {
        padding: var(--space-xl);
    }
}

/* ============================================
   Utility Classes
   ============================================ */

.hidden {
    display: none !important;
}

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

.text-muted {
    color: var(--text-muted);
}

.mt-lg {
    margin-top: var(--space-lg);
}

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