/* ==========================================================================
   Prompt Craft - CSS stylesheet
   Aesthetics: Premium Glassmorphism, Dark/Light Mode, Vibrant Accents, 
   Smooth Micro-animations.
   ========================================================================== */

/* Design Tokens & Theme Variables */
:root {
    /* Dark Theme (Default) */
    --bg-color: #0b0c10;
    --surface-color: #12131a;
    --surface-glass: rgba(18, 19, 26, 0.7);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.16);
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    /* Accents & Brand Gradients */
    --primary-color: #6366f1;
    --primary-light: #818cf8;
    --secondary-color: #a855f7;
    --accent-color: #06b6d4;
    --danger-color: #ef4444;
    --danger-hover: #dc2626;
    
    --grad-primary: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --grad-hover: linear-gradient(135deg, #4f46e5 0%, #9333ea 100%);
    --grad-accent: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
    
    /* Box Shadows & Glows */
    --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 40px rgba(0, 0, 0, 0.5);
    --glow-primary: 0 0 15px rgba(99, 102, 241, 0.25);
    --glow-accent: 0 0 15px rgba(6, 182, 212, 0.25);
    
    /* Fonts & Radii */
    --font-sans: 'Outfit', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme Variables */
body.light-theme {
    --bg-color: #f8fafc;
    --surface-color: #ffffff;
    --surface-glass: rgba(255, 255, 255, 0.85);
    --border-color: rgba(0, 0, 0, 0.08);
    --border-hover: rgba(0, 0, 0, 0.16);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --primary-color: #4f46e5;
    --primary-light: #6366f1;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.12);
    
    --glow-primary: 0 0 15px rgba(79, 70, 229, 0.15);
    --glow-accent: 0 0 15px rgba(6, 182, 212, 0.15);
}

/* ==========================================================================
   Base Styles & Scrollbars
   ========================================================================== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-sans);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    transition: background-color var(--transition-smooth), color var(--transition-smooth);
}

/* Custom Scrollbar for premium feel */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ==========================================================================
   App Layout
   ========================================================================== */
.app-container {
    display: flex;
    flex-direction: column;
    max-width: 1600px;
    width: 100%;
    margin: 0 auto;
    padding: 20px;
    gap: 20px;
    flex: 1;
}

/* Header styling */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background: var(--surface-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    z-index: 10;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    font-size: 2rem;
    animation: pulseGlow 3s infinite ease-in-out;
}

.title-sub h1 {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: var(--grad-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.title-sub p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 1px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Model Selector buttons */
.model-switch {
    display: flex;
    background: rgba(0, 0, 0, 0.2);
    padding: 4px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
}
body.light-theme .model-switch {
    background: rgba(0, 0, 0, 0.05);
}

.model-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 8px 20px;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all var(--transition-fast);
}

.btn-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: transparent;
    transition: all var(--transition-fast);
}

.model-btn.active {
    background: var(--surface-color);
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

#btnFlux.active .btn-indicator {
    background: var(--accent-color);
    box-shadow: var(--glow-accent);
}

#btnGemini.active .btn-indicator {
    background: var(--primary-color);
    box-shadow: var(--glow-primary);
}

.theme-toggle-btn {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    border-radius: 50%;
    transition: all var(--transition-fast);
}
.theme-toggle-btn:hover {
    border-color: var(--primary-color);
    transform: rotate(15deg);
}

/* Main Grid Layout */
.app-main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    align-items: start;
    flex: 1;
}

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

/* ==========================================================================
   Panel Common Styles
   ========================================================================== */
.panel {
    background: var(--surface-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

/* Input Actions Buttons inside panel header */
.input-actions {
    display: flex;
    gap: 8px;
    margin-left: auto;
    margin-right: 16px;
}

@media (max-width: 640px) {
    .panel-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    .input-actions {
        margin-left: 0;
        margin-right: 0;
        width: 100%;
    }
    .input-actions .action-btn {
        flex: 1;
        justify-content: center;
    }
}

#btnTranslate:hover:not(:disabled) {
    background: var(--grad-accent);
    color: #ffffff;
    border-color: transparent;
    box-shadow: var(--glow-accent);
    transform: translateY(-1px);
}

#btnPolish:hover:not(:disabled) {
    background: var(--grad-primary);
    color: #ffffff;
    border-color: transparent;
    box-shadow: var(--glow-primary);
    transform: translateY(-1px);
}

.input-actions .action-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: rgba(0, 0, 0, 0.1);
    border-color: var(--border-color);
}

.panel-header h2 {
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: -0.2px;
    color: var(--text-primary);
}

.model-badge {
    background: rgba(6, 182, 212, 0.15);
    color: var(--accent-color);
    padding: 4px 10px;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: var(--radius-full);
    border: 1px solid rgba(6, 182, 212, 0.2);
    letter-spacing: 0.5px;
    transition: all var(--transition-fast);
}

.model-badge.gemini-style {
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary-light);
    border-color: rgba(99, 102, 241, 0.2);
}

.helper-text {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* ==========================================================================
   Input Form Styles
   ========================================================================== */
.prompt-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    position: relative;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.field-num {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 400;
}

.field-help {
    cursor: help;
    font-size: 0.8rem;
    opacity: 0.6;
    transition: opacity var(--transition-fast);
}
.field-help:hover {
    opacity: 1;
}

/* Beautiful Tooltips */
.form-group[data-tip]:hover::after {
    content: attr(data-tip);
    position: absolute;
    bottom: calc(100% + 5px);
    left: 20px;
    background: #1e293b;
    color: #f1f5f9;
    padding: 8px 12px;
    font-size: 0.75rem;
    border-radius: var(--radius-sm);
    max-width: 300px;
    border: 1px solid rgba(255,255,255,0.1);
    box-shadow: 0 4px 12px rgba(0,0,0,0.5);
    z-index: 100;
    pointer-events: none;
    animation: fadeIn 0.2s ease-out;
}

.form-group textarea, 
.form-group input[type="text"] {
    background: rgba(0, 0, 0, 0.15);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    padding: 12px 16px;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    line-height: 1.5;
    outline: none;
    transition: all var(--transition-fast);
}

body.light-theme .form-group textarea,
body.light-theme .form-group input[type="text"] {
    background: rgba(0, 0, 0, 0.02);
}

.form-group textarea {
    min-height: 64px;
    resize: vertical;
}

.form-group textarea:focus,
.form-group input[type="text"]:focus {
    border-color: var(--primary-color);
    background: rgba(0, 0, 0, 0.25);
    box-shadow: var(--glow-primary);
}

/* Custom Text inputs specific styling */
.form-group input[type="text"] {
    height: 44px;
}

/* Form group visibility toggles for models */
.form-group.hidden {
    display: none;
}

/* ==========================================================================
   Vocabulary Selector
   ========================================================================== */
.right-column {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.vocab-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.vocab-tabs {
    display: flex;
    gap: 6px;
    overflow-x: auto;
    padding-bottom: 4px;
    border-bottom: 1px solid var(--border-color);
}

.vocab-tab-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 6px 12px;
    font-family: var(--font-sans);
    font-size: 0.82rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--radius-sm);
    white-space: nowrap;
    transition: all var(--transition-fast);
}

.vocab-tab-btn:hover {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
}

.vocab-tab-btn.active {
    background: var(--primary-color);
    color: #ffffff;
    box-shadow: var(--shadow-sm);
}

/* Tags Container and Tag Pills */
.vocab-content {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    max-height: 200px;
    overflow-y: auto;
    padding: 4px;
}

.vocab-tag {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: var(--radius-full);
    font-size: 0.78rem;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all var(--transition-fast);
}

body.light-theme .vocab-tag {
    background: #f1f5f9;
}

.vocab-tag:hover {
    background: var(--grad-primary);
    border-color: transparent;
    color: #ffffff;
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.vocab-tag .tag-en {
    opacity: 0.6;
    font-size: 0.72rem;
}
.vocab-tag:hover .tag-en {
    opacity: 0.9;
}

/* ==========================================================================
   Preview Box & Actions
   ========================================================================== */
.preview-panel {
    display: flex;
    flex-direction: column;
}

.preview-actions {
    display: flex;
    gap: 8px;
}

.action-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 12px;
    font-family: var(--font-sans);
    font-size: 0.8rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}
.action-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.action-btn.text-danger {
    color: var(--text-muted);
}
.action-btn.text-danger:hover {
    color: var(--danger-color);
    border-color: var(--danger-color);
}

.preview-box {
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    margin-bottom: 20px;
    flex: 1;
}

.preview-lang-tabs {
    display: flex;
    background: rgba(0, 0, 0, 0.15);
    border-bottom: 1px solid var(--border-color);
}

.lang-tab {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 10px 18px;
    font-family: var(--font-sans);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.lang-tab.active {
    background: var(--surface-color);
    color: var(--primary-light);
    border-bottom: 2px solid var(--primary-color);
}

.preview-body {
    padding: 16px;
    min-height: 120px;
    max-height: 250px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.preview-body.hidden {
    display: none;
}

.rendered-prompt-container {
    height: 100%;
}

.rendered-text {
    font-family: "Courier New", Courier, monospace;
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-primary);
    white-space: pre-wrap;
    word-break: break-all;
}

.rendered-text.text-zh {
    font-family: var(--font-sans);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Highlight tags in preview */
.prompt-part {
    color: var(--text-primary);
}
.prompt-label {
    color: var(--text-muted);
    font-weight: bold;
}
.prompt-value {
    color: var(--primary-light);
    background: rgba(99, 102, 241, 0.08);
    padding: 2px 4px;
    border-radius: 4px;
}

/* Actions at the bottom of preview */
.action-bar {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 12px;
}

@media (max-width: 600px) {
    .action-bar {
        grid-template-columns: 1fr;
    }
}

.main-action-btn {
    height: 46px;
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-sans);
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    transition: all var(--transition-fast);
}

.btn-primary {
    background: var(--grad-primary);
    color: #ffffff;
}
.btn-primary:hover {
    background: var(--grad-hover);
    box-shadow: var(--glow-primary);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}
.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--text-secondary);
}

.btn-accent {
    background: rgba(6, 182, 212, 0.1);
    border: 1px solid rgba(6, 182, 212, 0.2);
    color: var(--accent-color);
}
.btn-accent:hover {
    background: rgba(6, 182, 212, 0.25);
    border-color: var(--accent-color);
    box-shadow: var(--glow-accent);
}

/* ==========================================================================
   Drafts Panel
   ========================================================================== */
.drafts-panel.collapsed .drafts-content {
    display: none;
}
.drafts-panel.collapsed {
    padding-bottom: 12px;
}

.toggle-collapse-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.8rem;
    transition: transform var(--transition-fast);
}

.drafts-panel.collapsed .toggle-collapse-btn {
    transform: rotate(-90deg);
}

.drafts-content {
    display: flex;
    flex-direction: column;
    gap: 16px;
    animation: slideDown 0.3s ease-out;
}

.presets-section h3, 
.user-drafts-section h3 {
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

/* Presets List Styling */
.presets-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

@media (max-width: 600px) {
    .presets-list {
        grid-template-columns: 1fr;
    }
}

.preset-card {
    background: rgba(255,255,255,0.02);
    border: 1px solid var(--border-color);
    padding: 12px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.preset-card:hover {
    background: rgba(255,255,255,0.05);
    border-color: var(--primary-light);
    transform: translateY(-1px);
}

.preset-card h4 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary-light);
    margin-bottom: 4px;
}

.preset-card p {
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* User Drafts list */
.user-drafts-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 200px;
    overflow-y: auto;
}

.draft-item {
    background: rgba(0, 0, 0, 0.15);
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    transition: all var(--transition-fast);
}
.draft-item:hover {
    border-color: var(--text-muted);
}

.draft-info {
    cursor: pointer;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.draft-time {
    font-size: 0.68rem;
    color: var(--text-muted);
}

.draft-preview {
    font-size: 0.78rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 350px;
}

.delete-draft-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.9rem;
    padding: 4px;
    border-radius: 4px;
    transition: all var(--transition-fast);
}
.delete-draft-btn:hover {
    color: var(--danger-color);
    background: rgba(239, 68, 68, 0.1);
}

.empty-text {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: center;
    padding: 12px;
}

/* ==========================================================================
   Toast Notification Styling
   ========================================================================== */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    background: #10b981;
    color: #ffffff;
    padding: 12px 24px;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    box-shadow: 0 10px 25px rgba(16, 185, 129, 0.3);
    z-index: 9999;
    display: flex;
    align-items: center;
    gap: 8px;
    opacity: 1;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
    animation: toastBounceIn 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.toast.hidden {
    opacity: 0;
    transform: translate(-50%, 20px);
    pointer-events: none;
}

/* ==========================================================================
   Footer Styles
   ========================================================================== */
.app-footer {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
    padding: 12px 24px;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

@media (max-width: 768px) {
    .app-footer {
        flex-direction: column;
        align-items: center;
        gap: 8px;
        text-align: center;
    }
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideDown {
    from { opacity: 0; max-height: 0; overflow: hidden; }
    to { opacity: 1; max-height: 500px; }
}

@keyframes pulseGlow {
    0%, 100% { transform: scale(1); filter: drop-shadow(0 0 2px rgba(99, 102, 241, 0.4)); }
    50% { transform: scale(1.05); filter: drop-shadow(0 0 12px rgba(168, 85, 247, 0.8)); }
}

@keyframes toastBounceIn {
    0% { transform: translate(-50%, 40px) scale(0.85); opacity: 0; }
    70% { transform: translate(-50%, -4px) scale(1.02); opacity: 0.9; }
    100% { transform: translate(-50%, 0) scale(1); opacity: 1; }
}