/* ==========================================================================
   AI Storyboard & Prompt Studio - CSS Stylesheet
   ========================================================================== */

/* Design System & Variables */
:root {
    --bg-app: #090b11;
    --bg-header: rgba(16, 20, 35, 0.85);
    --bg-card: #131726;
    --bg-card-hover: #1b2035;
    --border-color: rgba(99, 102, 241, 0.15);
    --border-color-focus: rgba(99, 102, 241, 0.5);
    
    /* Brand Colors */
    --primary: #6366f1;         /* Indigo */
    --primary-hover: #4f46e5;
    --primary-light: rgba(99, 102, 241, 0.12);
    
    --secondary: #a855f7;       /* Purple/Violet */
    --secondary-hover: #9333ea;
    
    --success: #10b981;         /* Emerald */
    --success-light: rgba(16, 185, 129, 0.15);
    
    --danger: #f43f5e;          /* Rose */
    --danger-hover: #e11d48;
    --danger-light: rgba(244, 63, 94, 0.1);
    
    --warning: #f59e0b;         /* Amber */
    
    /* Text Colors */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    /* Gradients */
    --grad-primary: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --grad-primary-hover: linear-gradient(135deg, #4f46e5 0%, #9333ea 100%);
    --grad-dark: linear-gradient(180deg, #111422 0%, #090b11 100%);
    --grad-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
    
    /* Shadows & Blurs */
    --glow-shadow: 0 0 20px rgba(99, 102, 241, 0.25);
    --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    --glass-blur: blur(12px);
    
    /* Animation Timings */
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease;
}

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

body {
    font-family: 'Inter', 'Outfit', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-app);
    background-image: 
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.1) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(168, 85, 247, 0.08) 0px, transparent 50%);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: #090b11;
}

::-webkit-scrollbar-thumb {
    background: #252b44;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* App Container Layout */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    width: 100%;
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header Area styling */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 2rem;
    margin-top: 1rem;
    background: var(--bg-header);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    box-shadow: var(--card-shadow);
    z-index: 100;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    font-size: 1.75rem;
    background: var(--grad-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 2px 8px rgba(99, 102, 241, 0.4));
    animation: float 4s ease-in-out infinite;
}

.logo-text h1 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.4rem;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #ffffff 0%, #cfd5e2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-text span {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Navigation Tabs */
.tab-nav {
    display: flex;
    background: rgba(9, 11, 17, 0.6);
    padding: 0.35rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 9px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-fast);
}

.nav-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.03);
}

.nav-btn.active {
    color: var(--text-primary);
    background: var(--primary);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* Header Buttons */
.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.action-btn {
    border: none;
    border-radius: 10px;
    padding: 0.65rem 1.25rem;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-smooth);
}

.action-btn.primary {
    background: var(--grad-primary);
    color: var(--text-primary);
    box-shadow: var(--glow-shadow);
}

.action-btn.primary:hover {
    background: var(--grad-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 0 25px rgba(168, 85, 247, 0.4);
}

.action-btn.secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.action-btn.secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.15);
}

/* Stats Banner */
.stats-banner {
    display: flex;
    gap: 1.5rem;
    margin: 1.25rem 0;
    padding: 1.2rem 2rem;
    background: rgba(26, 29, 45, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: 16px;
    align-items: center;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-grow: 1;
}

.stat-item.mini {
    flex-grow: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.2rem;
    padding-left: 1.5rem;
    border-left: 1px solid rgba(255, 255, 255, 0.08);
    min-width: 100px;
}

.stat-label {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    white-space: nowrap;
}

.progress-container {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--grad-primary);
    border-radius: 4px;
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.stat-value {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--text-primary);
    white-space: nowrap;
}

.stat-item.mini .stat-value {
    font-size: 1.35rem;
    color: var(--primary);
    background: var(--grad-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Main Content Wrapper */
.main-content {
    flex-grow: 1;
    margin-bottom: 2rem;
}

.tab-content {
    display: none;
    animation: fadeIn 0.4s ease forwards;
}

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

/* Setup Panel Styles (Characters & Scenes) */
.setup-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

@media (max-width: 768px) {
    .setup-grid {
        grid-template-columns: 1fr;
    }
}

.setup-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.25rem 1.5rem;
    box-shadow: var(--card-shadow);
}

.setup-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.85rem;
}

.setup-card-header h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.setup-card-header h3 i {
    color: var(--primary);
}

.help-tooltip {
    color: var(--text-muted);
    cursor: help;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.help-tooltip:hover {
    color: var(--text-secondary);
}

.input-group {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.input-group input {
    flex-grow: 1;
    background: rgba(9, 11, 17, 0.5);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.6rem 0.85rem;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition-fast);
}

.input-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.15);
}

.add-btn {
    background: var(--primary-light);
    border: 1px solid var(--border-color);
    color: var(--primary);
    width: 38px;
    height: 38px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
}

.add-btn:hover {
    background: var(--primary);
    color: var(--text-primary);
    border-color: var(--primary);
    transform: scale(1.05);
}

/* Chip Container */
.chip-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    min-height: 28px;
}

.chip {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 30px;
    padding: 0.35rem 0.75rem;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: var(--transition-fast);
    animation: scaleIn 0.2s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

.chip:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.15);
}

.chip .delete-chip {
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.75rem;
    transition: var(--transition-fast);
}

.chip .delete-chip:hover {
    color: var(--danger);
}

/* Matrix Table Layout styling */
.matrix-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 1.5rem;
    overflow-x: auto;
    box-shadow: var(--card-shadow);
}

.matrix-container {
    min-width: 100%;
}

.empty-matrix-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    text-align: center;
    color: var(--text-secondary);
}

.empty-icon {
    font-size: 3rem;
    background: var(--grad-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1.25rem;
    opacity: 0.65;
}

.empty-matrix-state h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.empty-matrix-state p {
    font-size: 0.85rem;
    color: var(--text-muted);
    max-width: 420px;
}

/* Matrix Table UI */
.matrix-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0.75rem;
    margin: -0.75rem; /* compensates for spacing */
}

.matrix-table th {
    font-family: 'Outfit', sans-serif;
    font-size: 0.95rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 0.75rem;
    text-align: center;
    border-radius: 8px;
    color: var(--text-secondary);
}

.matrix-table th.corner-cell {
    width: 140px;
    text-align: left;
    color: var(--text-muted);
    font-size: 0.8rem;
    position: relative;
}

.matrix-table th.character-header {
    background: rgba(99, 102, 241, 0.08);
    border: 1px solid rgba(99, 102, 241, 0.15);
    color: var(--text-primary);
    min-width: 200px;
}

.matrix-table td.scene-header {
    background: rgba(168, 85, 247, 0.08);
    border: 1px solid rgba(168, 85, 247, 0.15);
    font-family: 'Outfit', sans-serif;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    vertical-align: middle;
    width: 140px;
    border-radius: 8px;
    padding: 1rem 0.5rem;
    line-height: 1.3;
}

/* Grid Storyboard Cells */
.matrix-cell-card {
    width: 160px;
    height: 160px; /* Fixed 1:1 square ratio */
    background: rgba(9, 11, 17, 0.4);
    border: 2px dashed rgba(255, 255, 255, 0.07);
    border-radius: 12px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 0.75rem;
    text-align: center;
    transition: var(--transition-smooth);
    margin: 0 auto;
}

.matrix-table td {
    text-align: center;
    vertical-align: middle;
    padding: 0.25rem;
}

.matrix-cell-card:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.04);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px -8px rgba(99, 102, 241, 0.3);
}

.cell-empty-icon {
    font-size: 1.5rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    transition: var(--transition-fast);
}

.matrix-cell-card:hover .cell-empty-icon {
    color: var(--primary);
    transform: scale(1.1);
}

.cell-empty-label {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.cell-prompt-preview {
    margin-top: 0.5rem;
    font-size: 0.72rem;
    color: var(--text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    max-width: 90%;
    line-height: 1.3;
}

/* Cell with Prompt but no Image */
.matrix-cell-card.has-prompt {
    border-color: rgba(99, 102, 241, 0.3);
    border-style: solid;
    background: rgba(99, 102, 241, 0.02);
}

.matrix-cell-card.has-prompt .cell-empty-icon {
    color: var(--secondary);
}

.matrix-cell-card.has-prompt .cell-empty-label {
    color: var(--text-primary);
}

/* Completed Cell with Image */
.matrix-cell-card.completed {
    border-style: solid;
    border-color: rgba(255, 255, 255, 0.08);
    padding: 0;
}

.matrix-cell-card.completed:hover {
    border-color: var(--success);
    box-shadow: 0 8px 20px -8px rgba(16, 185, 129, 0.4);
}

.cell-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

.matrix-cell-card.completed:hover .cell-image {
    transform: scale(1.05);
}

/* Completed Hover Overlay */
.cell-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(9, 11, 17, 0.85);
    opacity: 0;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 0.85rem;
    transition: var(--transition-fast);
    backdrop-filter: blur(2px);
}

.matrix-cell-card.completed:hover .cell-overlay {
    opacity: 1;
}

.overlay-badge {
    align-self: flex-start;
    background: var(--grad-success);
    color: #fff;
    font-size: 0.65rem;
    font-weight: 700;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.overlay-details {
    text-align: left;
}

.overlay-composition {
    font-family: 'Outfit', sans-serif;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.2rem;
}

.overlay-prompt {
    font-size: 0.7rem;
    color: var(--text-secondary);
    line-height: 1.3;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.overlay-edit-indicator {
    align-self: flex-end;
    font-size: 0.72rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

/* Tab 2: Prompt Workspace Styles */
.workspace-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding: 0.5rem 0;
}

.workspace-title-desc h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.workspace-title-desc h2 i {
    background: var(--grad-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.workspace-title-desc p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.prompts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 1.5rem;
}

@media (max-width: 480px) {
    .prompts-grid {
        grid-template-columns: 1fr;
    }
}

.prompt-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.25rem 1.5rem;
    box-shadow: var(--card-shadow);
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    transition: var(--transition-smooth);
    animation: scaleIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

.prompt-card:hover {
    border-color: rgba(99, 102, 241, 0.35);
    box-shadow: 0 10px 25px -5px rgba(99, 102, 241, 0.1);
}

.prompt-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
}

.prompt-card-title-input {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-primary);
    font-family: 'Outfit', sans-serif;
    font-size: 1.05rem;
    font-weight: 600;
    width: 100%;
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
    outline: none;
    transition: var(--transition-fast);
}

.prompt-card-title-input:hover {
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.08);
}

.prompt-card-title-input:focus {
    background: rgba(9, 11, 17, 0.5);
    border-color: var(--primary);
    box-shadow: 0 0 8px rgba(99, 102, 241, 0.1);
}

.prompt-card-body {
    flex-grow: 1;
}

.prompt-card-textarea {
    width: 100%;
    height: 180px;
    background: rgba(9, 11, 17, 0.4);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 0.85rem;
    color: var(--text-primary);
    font-family: 'Inter', system-ui, sans-serif;
    font-size: 0.9rem;
    line-height: 1.45;
    resize: none;
    outline: none;
    transition: var(--transition-smooth);
}

.prompt-card-textarea:focus {
    border-color: var(--primary);
    background: rgba(9, 11, 17, 0.6);
    box-shadow: 0 0 12px rgba(99, 102, 241, 0.15);
}

.prompt-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 0.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.char-counter {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
}

.char-counter strong {
    color: var(--text-secondary);
}

.prompt-card-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-card-icon {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-secondary);
    width: 32px;
    height: 32px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    transition: var(--transition-smooth);
}

.btn-card-icon:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
}

.btn-card-icon.copy-btn:hover {
    color: var(--success);
    border-color: var(--success);
    background: var(--success-light);
}

.btn-card-icon.delete-btn:hover {
    color: var(--danger);
    border-color: var(--danger);
    background: var(--danger-light);
}

/* Modal Window Structure */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(4, 5, 9, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal-content {
    background: var(--bg-card);
    background-image: var(--grad-dark);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 24px;
    width: 90%;
    max-width: 1200px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7), var(--glow-shadow);
    overflow: hidden;
    transform: translateY(30px) scale(0.95);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.active .modal-content {
    transform: translateY(0) scale(1);
}

.modal-header {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.35rem;
    font-weight: 700;
    background: var(--grad-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.modal-subtitle {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.close-modal-btn {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    width: 36px;
    height: 36px;
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.close-modal-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
}

.modal-body {
    padding: 2rem;
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 2rem;
    max-height: 80vh;
    overflow-y: auto;
}

@media (max-width: 680px) {
    .modal-body {
        grid-template-columns: 1fr;
    }
}

.modal-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

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

.form-group textarea {
    background: rgba(9, 11, 17, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 0.75rem 0.85rem;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.88rem;
    line-height: 1.45;
    resize: none;
    outline: none;
    transition: var(--transition-smooth);
}

.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.2);
}

.form-group input {
    background: rgba(9, 11, 17, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.65rem 0.85rem;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition-fast);
}

.form-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.2);
}

/* Image Upload Dropzone */
.modal-uploader {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.modal-uploader label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.modal-uploader label i {
    color: var(--secondary);
}

.dropzone {
    flex-grow: 1;
    border: 2px dashed rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    background: rgba(9, 11, 17, 0.4);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 2rem 1rem;
    text-align: center;
    position: relative;
    cursor: pointer;
    min-height: 220px;
    transition: var(--transition-smooth);
}

.dropzone:hover, .dropzone.dragover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.04);
}

.cloud-icon {
    font-size: 2.25rem;
    color: var(--text-muted);
    margin-bottom: 0.85rem;
    transition: var(--transition-smooth);
}

.dropzone:hover .cloud-icon, .dropzone.dragover .cloud-icon {
    color: var(--primary);
    transform: translateY(-4px);
}

.dropzone-text {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.35rem;
}

.dropzone-text strong {
    color: var(--primary);
}

.dropzone-hint {
    font-size: 0.7rem;
    color: var(--text-muted);
    max-width: 80%;
}

.dropzone-preview-state {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.dropzone-preview-state img {
    max-width: 100%;
    max-height: 550px;
    object-fit: contain;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    transition: var(--transition-smooth);
}

.btn-danger-sm {
    background: var(--danger-light);
    border: 1px solid rgba(244, 63, 94, 0.2);
    color: var(--danger);
    padding: 0.4rem 0.8rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.3rem;
    transition: var(--transition-smooth);
}

.btn-danger-sm:hover {
    background: var(--danger);
    color: var(--text-primary);
    border-color: var(--danger);
}

.modal-footer {
    padding: 1.25rem 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: flex-end;
}

/* Toast System */
.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    z-index: 9999;
}

.toast {
    background: rgba(26, 29, 45, 0.9);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--primary);
    padding: 1rem 1.5rem;
    border-radius: 12px;
    box-shadow: var(--card-shadow);
    color: var(--text-primary);
    font-size: 0.88rem;
    font-weight: 600;
    min-width: 260px;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    animation: slideInLeft 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

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

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

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

.toast-icon {
    font-size: 1.1rem;
}

.toast.success .toast-icon { color: var(--success); }
.toast.danger .toast-icon { color: var(--danger); }
.toast.warning .toast-icon { color: var(--warning); }

/* Footer styling */
.app-footer {
    padding: 2rem 0;
    text-align: right;
    border-top: 1px solid rgba(255, 255, 255, 0.03);
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-manual-link {
    color: var(--text-secondary);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-weight: 600;
    transition: var(--transition-fast);
    padding: 0.3rem 0.7rem;
    border-radius: 6px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    background: rgba(255, 255, 255, 0.02);
}

.footer-manual-link:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.05);
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.15);
}

.text-vibrant {
    background: var(--grad-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); box-shadow: var(--glow-shadow); }
    50% { transform: scale(1.02); box-shadow: 0 0 30px rgba(99, 102, 241, 0.45); }
}

.animate-pulse {
    animation: pulse 3s infinite ease-in-out;
}

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(50px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes slideOutRight {
    from { opacity: 1; transform: translateX(0); }
    to { opacity: 0; transform: translateX(50px); }
}

.toast.toast-leave {
    animation: slideOutRight 0.3s ease forwards;
}

/* ==========================================================================
   Bulk Image Pool & Drag and Drop Styles
   ========================================================================== */

.image-pool-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--card-shadow);
}

.pool-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.pool-title h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.2rem;
}

.pool-title h3 i {
    color: var(--secondary);
}

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

.pool-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.pool-dropzone {
    border: 2px dashed rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    background: rgba(9, 11, 17, 0.3);
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
}

.pool-dropzone.dragover {
    border-color: var(--secondary);
    background: rgba(168, 85, 247, 0.03);
}

.pool-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--text-muted);
    font-size: 0.8rem;
    gap: 0.4rem;
    padding: 1.5rem;
    text-align: center;
}

.pool-empty-state i {
    font-size: 1.75rem;
    margin-bottom: 0.2rem;
}

.pool-tray {
    width: 100%;
    display: flex;
    gap: 0.85rem;
    padding: 0.75rem;
    overflow-x: auto;
    align-items: center;
}

.pool-img-card {
    width: 80px;
    height: 80px; /* Fixed 1:1 square ratio */
    border-radius: 8px;
    overflow: hidden;
    position: relative;
    cursor: grab;
    border: 2px solid rgba(255, 255, 255, 0.1);
    flex-shrink: 0;
    transition: var(--transition-smooth);
}

.pool-img-card:hover {
    border-color: var(--secondary);
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(168, 85, 247, 0.3);
}

.pool-img-card:active {
    cursor: grabbing;
}

.pool-img-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.pool-img-remove {
    position: absolute;
    top: 2px;
    right: 2px;
    background: rgba(0,0,0,0.7);
    color: var(--text-secondary);
    border: none;
    width: 18px;
    height: 18px;
    border-radius: 4px;
    font-size: 0.7rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-fast);
}

.pool-img-card:hover .pool-img-remove {
    opacity: 1;
}

.pool-img-remove:hover {
    color: var(--danger);
    background: #000;
}

/* Drag and Drop Visual Feedback */
.chip[draggable="true"] {
    cursor: grab;
}

.chip.dragging {
    opacity: 0.4;
    border-style: dashed;
    background: rgba(99, 102, 241, 0.1);
}

.chip.drag-over {
    border-color: var(--primary) !important;
    background: rgba(99, 102, 241, 0.15) !important;
    transform: scale(1.05);
}

.matrix-cell-card.drag-over {
    border-color: var(--secondary) !important;
    background: rgba(168, 85, 247, 0.08) !important;
    box-shadow: 0 0 15px rgba(168, 85, 247, 0.4);
}

/* New Project Action Button style */
.action-btn.secondary.text-danger:hover {
    color: var(--danger);
    border-color: rgba(244, 63, 94, 0.3) !important;
    background: var(--danger-light) !important;
}

/* Drag and Drop Response Optimization: Disables mouse events on inner elements during dragging */
.matrix-cell-card img,
.matrix-cell-card div,
.matrix-cell-card span,
.matrix-cell-card i,
.matrix-cell-card p {
    pointer-events: none;
}

.pool-img-card img {
    pointer-events: none;
}

.pool-img-card * {
    pointer-events: none;
}

.pool-img-card .pool-img-remove,
.pool-img-card .pool-img-remove i {
    pointer-events: auto;
}

/* Prompt Workspace Actions & Drag and Drop styling */
.workspace-actions {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.prompt-card {
    cursor: grab;
}

.prompt-card:active {
    cursor: grabbing;
}

.prompt-card.dragging {
    opacity: 0.4;
    border-style: dashed;
    background: rgba(99, 102, 241, 0.05);
}

.prompt-card.drag-over {
    border-color: var(--primary) !important;
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.2) !important;
    transform: scale(1.02);
}

.prompt-card-index {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.15);
    padding: 0.15rem 0.45rem;
    border-radius: 6px;
    font-size: 0.78rem;
    flex-shrink: 0;
}

/* Prompt Modal specific styles */
.prompt-modal-content {
    max-width: 700px;
}

.modal-body.single-column {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    padding: 1.5rem 2rem;
}

.modal-char-counter {
    background: rgba(9, 11, 17, 0.4);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.modal-char-counter strong {
    color: var(--primary);
}

.btn-card-icon.edit-btn:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: var(--primary-light);
}

/* Lightbox Fullscreen Image Inspection Styles */
.lightbox-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(4, 5, 8, 0.94);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: zoom-out;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.lightbox-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.lightbox-content {
    max-width: 90%;
    max-height: 85vh;
    object-fit: contain;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.9);
    transform: scale(0.93);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

.lightbox-close {
    position: absolute;
    top: 25px;
    right: 35px;
    color: #fff;
    font-size: 2.2rem;
    cursor: pointer;
    opacity: 0.6;
    transition: var(--transition-fast);
}

.lightbox-close:hover {
    opacity: 1;
    transform: scale(1.15);
}

.lightbox-caption {
    margin-top: 18px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-family: 'Outfit', sans-serif;
    font-weight: 500;
}

/* Table Header Drag and Drop Visual States */
.character-header.drag-over, .scene-header.drag-over {
    background: rgba(99, 102, 241, 0.25) !important;
    color: var(--primary) !important;
}

.character-header.dragging, .scene-header.dragging {
    opacity: 0.3;
}

/* Header Undo/Redo Divider and Icon Styles */
.header-divider {
    width: 1px;
    height: 20px;
    background: rgba(255, 255, 255, 0.15);
    margin: 0 0.25rem;
}

.action-btn.icon-only {
    padding: 0;
    width: 36px;
    height: 36px;
    min-width: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
}

/* ==========================================================================
   Mobile Responsive Adaptations (Strict Mobile Compatibility)
   ========================================================================== */
@media (max-width: 768px) {
    /* Hide button text to prevent double-line wraps and allow grid alignment */
    .btn-text {
        display: none !important;
    }
    
    .app-container {
        padding: 0 0.5rem;
    }
    
    /* App Header stacking and optimization */
    .app-header {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
        padding: 1rem;
        margin-top: 0.5rem;
    }
    
    .logo-area {
        justify-content: center;
    }
    
    .tab-nav {
        justify-content: center;
        width: 100%;
    }
    
    .nav-btn {
        flex-grow: 1;
        justify-content: center;
        padding: 0.6rem;
        font-size: 0.85rem;
        gap: 0.3rem;
    }
    
    .header-actions {
        justify-content: center;
        flex-wrap: wrap;
        gap: 0.4rem;
        width: 100%;
    }
    
    .header-actions .action-btn {
        padding: 0.6rem;
        min-width: 38px;
        height: 38px;
        justify-content: center;
        gap: 0;
    }
    
    .header-divider {
        display: none;
    }
    
    /* Stats banner stacking */
    .stats-banner {
        flex-direction: column;
        align-items: stretch;
        padding: 0.85rem;
        gap: 0.75rem;
    }
    
    .stat-item {
        width: 100%;
    }
    
    .stat-item.mini {
        border-left: none;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        padding-left: 0;
        padding-top: 0.6rem;
        min-width: 0;
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
    
    /* Matrix Table responsive wrapper touch-scroll physics */
    .matrix-wrapper {
        padding: 0.85rem;
        border-radius: 14px;
        -webkit-overflow-scrolling: touch; /* Kinetic bounce scroll */
    }
    
    .matrix-table {
        border-spacing: 0.5rem;
    }
    
    /* Prompts layout */
    .prompts-grid {
        grid-template-columns: 1fr !important;
        gap: 1rem;
    }
    
    .prompt-card {
        padding: 1rem;
    }
    
    .prompt-card-textarea {
        height: 140px;
    }
    
    .workspace-header {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
        text-align: center;
    }
    
    .workspace-actions {
        justify-content: center;
    }
    
    /* Modals optimizations */
    .modal-content {
        width: 95%;
        border-radius: 16px;
    }
    
    .modal-body {
        padding: 1rem;
        gap: 1rem;
        max-height: 75vh;
    }
    
    .modal-footer {
        padding: 1rem;
    }
    
    .dropzone-preview-state img {
        max-height: 240px; /* Constrain image height on mobile so modal stays within viewport and scrolls easily */
    }
    
    .dropzone {
        min-height: 160px;
        padding: 1rem;
    }
    
    /* Central toast position on mobile */
    .toast-container {
        left: 50%;
        transform: translateX(-50%);
        right: auto;
        bottom: 1rem;
        width: calc(100% - 2rem);
        max-width: 360px;
        align-items: center;
    }
    
    .toast {
        width: 100%;
        justify-content: center;
    }
    
    /* Footer stacking on mobile */
    .app-footer {
        flex-direction: column;
        gap: 0.75rem;
        text-align: center;
        padding: 1.5rem 0;
    }
}