/* ================================================================
   Image Frame Generator — Premium Design System
   Dark/Light Glassmorphism + Modern Animations
   ================================================================ */

/* ─── Design Tokens ──────────────────────────────────────────── */
:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-glow: rgba(99, 102, 241, 0.35);
    --secondary: #06b6d4;
    --accent: #f43f5e;
    --success: #10b981;
    --warning: #f59e0b;

    --bg-body: #0a0e1a;
    --bg-surface: rgba(15, 23, 42, 0.85);
    --bg-card: rgba(30, 41, 59, 0.65);
    --bg-elevated: rgba(51, 65, 85, 0.4);
    --border-subtle: rgba(255, 255, 255, 0.07);
    --border-active: rgba(99, 102, 241, 0.4);

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    --shadow-card: 0 8px 32px -8px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 40px -12px var(--primary-glow);
    --shadow-elevated: 0 16px 48px -12px rgba(0, 0, 0, 0.5);

    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --transition: all 0.3s var(--ease);

    --font-ui: 'Outfit', 'Roboto', sans-serif;
    --font-bangla: 'Hind Siliguri', 'Noto Sans Bengali', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

/* ─── Light Theme Overrides ──────────────────────────────────── */
[data-bs-theme="light"] {
    --bg-body: #f0f2f7;
    --bg-surface: rgba(255, 255, 255, 0.9);
    --bg-card: rgba(255, 255, 255, 0.85);
    --bg-elevated: rgba(241, 245, 249, 0.8);
    --border-subtle: rgba(0, 0, 0, 0.06);
    --border-active: rgba(99, 102, 241, 0.3);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --shadow-card: 0 8px 32px -8px rgba(99, 102, 241, 0.1);
    --shadow-glow: 0 0 40px -12px rgba(99, 102, 241, 0.15);
    --shadow-elevated: 0 16px 48px -12px rgba(0, 0, 0, 0.08);
}

/* ─── Base Layout ────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

body {
    font-family: var(--font-ui);
    background-color: var(--bg-body);
    background-image:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(99, 102, 241, 0.12), transparent),
        radial-gradient(ellipse 60% 40% at 80% 100%, rgba(6, 182, 212, 0.08), transparent);
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

.main-wrapper { flex: 1 0 auto; }

/* ─── Typography ─────────────────────────────────────────────── */
.font-outfit { font-family: var(--font-ui); }
.font-bangla { font-family: var(--font-bangla); }
.font-mono { font-family: var(--font-mono); }
.tracking-tight { letter-spacing: -0.025em; }

.text-gradient {
    background: linear-gradient(135deg, #818cf8 0%, #22d3ee 50%, #a78bfa 100%);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 6s ease infinite;
}

[data-bs-theme="light"] .text-gradient {
    background: linear-gradient(135deg, #4f46e5 0%, #0891b2 50%, #7c3aed 100%);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 6s ease infinite;
}

@keyframes shimmer {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* ─── Glassmorphism Navbar ───────────────────────────────────── */
.navbar-blur {
    background-color: var(--bg-surface) !important;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border-subtle);
    transition: var(--transition);
    z-index: 1040;
}

/* ─── Glass Cards ────────────────────────────────────────────── */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px) saturate(150%);
    -webkit-backdrop-filter: blur(16px) saturate(150%);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    padding: 24px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.glass-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: linear-gradient(135deg, rgba(255,255,255,0.08), transparent 60%);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask-composite: xor;
    -webkit-mask-composite: xor;
    pointer-events: none;
}
.glass-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
    border-color: var(--border-active);
}

/* ─── Canvas Preview ─────────────────────────────────────────── */
.canvas-container-outer {
    position: relative;
    max-width: 100%;
    margin: 0 auto;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-elevated);
    background: #000;
    border: 2px solid var(--border-subtle);
}

/* Fabric.js responsive override */
.canvas-container {
    max-width: 100% !important;
    height: 100% !important;
    aspect-ratio: 1/1;
    margin: 0 auto;
}
canvas {
    max-width: 100% !important;
    height: 100% !important;
    aspect-ratio: 1/1;
}

/* ─── Frame Thumbnails Grid ──────────────────────────────────── */
.frame-thumbnail-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
    gap: 10px;
    max-height: 360px;
    overflow-y: auto;
    padding: 4px;
}

.frame-thumbnail {
    cursor: pointer;
    border: 3px solid transparent;
    border-radius: var(--radius-sm);
    padding: 3px;
    background: var(--bg-elevated);
    transition: var(--transition);
    position: relative;
    aspect-ratio: 1;
    overflow: hidden;
}
.frame-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 5px;
    transition: transform 0.3s var(--ease);
}
.frame-thumbnail:hover {
    border-color: var(--secondary);
    transform: scale(1.06);
}
.frame-thumbnail:hover img {
    transform: scale(1.08);
}
.frame-thumbnail.active {
    border-color: var(--primary);
    box-shadow: 0 0 16px var(--primary-glow);
}
.frame-thumbnail.active::after {
    content: '\f058';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    top: 6px;
    right: 6px;
    color: var(--primary);
    font-size: 14px;
    text-shadow: 0 1px 3px rgba(0,0,0,0.5);
}

/* ─── Category Badges ────────────────────────────────────────── */
.category-badge {
    cursor: pointer;
    transition: var(--transition);
    padding: 6px 14px;
    border-radius: 30px;
    font-weight: 500;
    font-size: 0.8rem;
    border: 1px solid var(--border-subtle);
    user-select: none;
}
.category-badge:hover {
    border-color: var(--primary);
    color: #fff !important;
}
.category-badge.active {
    background: linear-gradient(135deg, var(--primary), #7c3aed) !important;
    color: #fff !important;
    border-color: transparent;
    box-shadow: 0 2px 12px var(--primary-glow);
}

/* ─── Upload Drop Zone ───────────────────────────────────────── */
.upload-zone {
    border: 2px dashed var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 24px 16px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}
.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.06);
}
.upload-zone.dragover {
    transform: scale(1.02);
}
.upload-zone.has-file {
    border-color: var(--success);
    border-style: solid;
}
.upload-zone input[type="file"] {
    display: none;
}

/* ─── Theme Toggle ───────────────────────────────────────────── */
.btn-theme-toggle {
    background: transparent;
    border: 1px solid var(--border-subtle);
    border-radius: 50%;
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    transition: var(--transition);
    cursor: pointer;
}
.btn-theme-toggle:hover {
    background: var(--bg-elevated);
    transform: rotate(20deg);
    border-color: var(--primary);
}

/* ─── Search Input ───────────────────────────────────────────── */
.search-input-wrap {
    position: relative;
}
.search-input-wrap .fa-search {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.85rem;
}
.search-input-wrap input {
    padding-left: 36px;
}

/* ─── Favorite Star ──────────────────────────────────────────── */
.frame-fav-btn {
    position: absolute;
    top: 6px;
    left: 6px;
    z-index: 2;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 12px;
    text-shadow: 0 1px 3px rgba(0,0,0,0.5);
    transition: var(--transition);
}
.frame-fav-btn:hover,
.frame-fav-btn.favorited {
    color: var(--warning);
}

/* ─── Section Labels ─────────────────────────────────────────── */
.section-label {
    font-family: var(--font-ui);
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.section-label .badge-num {
    background: linear-gradient(135deg, var(--primary), #7c3aed);
    color: #fff;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
}

/* ─── Custom Sliders ─────────────────────────────────────────── */
.form-range::-webkit-slider-thumb {
    background: var(--primary);
    border: 2px solid #fff;
    box-shadow: 0 2px 6px rgba(0,0,0,0.3);
}
.form-range::-webkit-slider-thumb:active {
    background: var(--primary-hover);
}
.form-range::-webkit-slider-runnable-track {
    background: var(--bg-elevated);
}

/* ─── Loading Overlay ────────────────────────────────────────── */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 14, 26, 0.88);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    backdrop-filter: blur(10px);
}
.loading-overlay .spinner-ring {
    width: 56px;
    height: 56px;
    border: 4px solid var(--border-subtle);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Progress bar inside loading */
.progress-bar-animated {
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    background-size: 200% 100%;
    animation: progressGlow 1.5s ease infinite;
}
@keyframes progressGlow {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* ─── Download Buttons ───────────────────────────────────────── */
.btn-download-primary {
    background: linear-gradient(135deg, var(--primary), #7c3aed);
    border: none;
    color: #fff;
    font-weight: 600;
    font-family: var(--font-ui);
    padding: 14px 20px;
    border-radius: var(--radius-md);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.btn-download-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent, rgba(255,255,255,0.1), transparent);
    transform: translateX(-100%);
    transition: transform 0.5s var(--ease);
}
.btn-download-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--primary-glow);
    color: #fff;
}
.btn-download-primary:hover::before {
    transform: translateX(100%);
}

/* ─── Footer ─────────────────────────────────────────────────── */
.site-footer {
    background: var(--bg-surface);
    border-top: 1px solid var(--border-subtle);
}

/* ─── Scrollbar ──────────────────────────────────────────────── */
::-webkit-scrollbar { width: 7px; height: 7px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: rgba(148, 163, 184, 0.2);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(148, 163, 184, 0.35);
}

/* ─── Admin Sidebar ──────────────────────────────────────────── */
.admin-sidebar {
    min-height: calc(100vh - 120px);
    position: sticky;
    top: 80px;
}
.admin-nav-link {
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
    font-size: 0.9rem;
}
.admin-nav-link:hover,
.admin-nav-link.active {
    color: var(--text-primary);
    background: rgba(99, 102, 241, 0.1);
}
.admin-nav-link.active {
    border-left: 3px solid var(--primary);
}
.admin-nav-link i {
    width: 22px;
    text-align: center;
    font-size: 1rem;
}

/* ─── Stats Cards ────────────────────────────────────────────── */
.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 20px;
    transition: var(--transition);
    text-align: center;
}
.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}
.stat-card .stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
    font-size: 1.2rem;
}
.stat-card .stat-value {
    font-size: 1.8rem;
    font-weight: 700;
    font-family: var(--font-ui);
}
.stat-card .stat-label {
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 500;
}

/* ─── Frame Designer ─────────────────────────────────────────── */
.designer-canvas-wrap {
    position: relative;
    background: #111827;
    border: 2px solid var(--border-subtle);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-elevated);
}
.designer-toolbar {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    padding: 8px 0;
}
.designer-toolbar .btn {
    font-size: 0.8rem;
    padding: 6px 12px;
}

/* Placeholder color legend */
.placeholder-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.78rem;
}
.placeholder-legend .legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
}
.placeholder-legend .legend-swatch {
    width: 14px;
    height: 14px;
    border-radius: 3px;
    border: 1px solid rgba(255,255,255,0.2);
}

/* ─── Coordinate Panel ───────────────────────────────────────── */
.coord-panel {
    font-size: 0.78rem;
    font-family: var(--font-mono);
    background: var(--bg-elevated);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
}
.coord-panel .coord-label {
    color: var(--text-muted);
    font-family: var(--font-ui);
    font-weight: 600;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ─── Responsive ─────────────────────────────────────────────── */
@media (max-width: 991.98px) {
    .admin-sidebar {
        min-height: auto;
        position: static;
        flex-direction: row !important;
        flex-wrap: wrap;
    }
    .admin-nav-link {
        padding: 10px 14px;
        font-size: 0.85rem;
    }
}

@media (max-width: 767.98px) {
    .glass-card { padding: 16px; }

    .frame-thumbnail-list {
        grid-template-columns: repeat(auto-fill, minmax(72px, 1fr));
        gap: 8px;
        max-height: 240px;
    }

    .section-label { font-size: 0.88rem; }

    .btn-download-primary { padding: 12px 16px; font-size: 0.9rem; }
}

@media (max-width: 575.98px) {
    .frame-thumbnail-list {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ─── Animations ─────────────────────────────────────────────── */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}
.anim-fade-up {
    animation: fadeInUp 0.5s var(--ease) both;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50%      { opacity: 0.6; }
}
.anim-pulse {
    animation: pulse 2s var(--ease) infinite;
}

/* ─── Toast Notifications ────────────────────────────────────── */
.toast-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 9998;
}
.ifg-toast {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 14px 20px;
    margin-bottom: 8px;
    box-shadow: var(--shadow-card);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.88rem;
    animation: fadeInUp 0.3s var(--ease);
    max-width: 360px;
}
.ifg-toast.toast-success { border-left: 3px solid var(--success); }
.ifg-toast.toast-error   { border-left: 3px solid var(--accent); }
.ifg-toast.toast-info    { border-left: 3px solid var(--secondary); }