/* ══════════════════════════════════════════
   DocScan - Main Stylesheet
   Bootstrap 5.3 + Custom Variables
   ══════════════════════════════════════════ */

/* ── CSS Variables ── */
:root,
[data-bs-theme="light"] {
    --ds-primary: #2563eb;
    --ds-primary-rgb: 37,99,235;
    --ds-bg: #f8f9fa;
    --ds-surface: #ffffff;
    --ds-surface-hover: #f1f5f9;
    --ds-border: #e2e8f0;
    --ds-text: #1e293b;
    --ds-text-muted: #64748b;
    --ds-navbar-bg: rgba(255,255,255,0.95);
    --ds-card-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --ds-card-shadow-hover: 0 4px 12px rgba(0,0,0,0.08);
    --ds-hero-gradient: linear-gradient(135deg, #eff6ff 0%, #f0fdf4 50%, #faf5ff 100%);
    --ds-footer-bg: #f1f5f9;
    --ds-dropzone-bg: #f8fafc;
    --ds-dropzone-border: #cbd5e1;
    --ds-preview-bg: #f1f5f9;
}

[data-bs-theme="dark"] {
    --ds-primary: #3b82f6;
    --ds-primary-rgb: 59,130,246;
    --ds-bg: #0f172a;
    --ds-surface: #1e293b;
    --ds-surface-hover: #334155;
    --ds-border: #334155;
    --ds-text: #f1f5f9;
    --ds-text-muted: #94a3b8;
    --ds-navbar-bg: rgba(15,23,42,0.95);
    --ds-card-shadow: 0 1px 3px rgba(0,0,0,0.3);
    --ds-card-shadow-hover: 0 4px 12px rgba(0,0,0,0.4);
    --ds-hero-gradient: linear-gradient(135deg, #0f172a 0%, #1a1a2e 50%, #16213e 100%);
    --ds-footer-bg: #1e293b;
    --ds-dropzone-bg: #1e293b;
    --ds-dropzone-border: #475569;
    --ds-preview-bg: #1e293b;
}

/* ── Base ── */
body {
    background-color: var(--ds-bg);
    color: var(--ds-text);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.ds-main { flex: 1; }

/* ── Navbar ── */
.ds-navbar {
    background: var(--ds-navbar-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--ds-border);
    box-shadow: 0 1px 2px rgba(0,0,0,0.04);
    z-index: 1030;
}
.ds-navbar .navbar-brand {
    color: var(--ds-primary);
    font-size: 1.25rem;
}

/* ── Theme Toggle ── */
.ds-theme-toggle {
    border: none;
    font-size: 1.1rem;
    padding: 0.25rem 0.5rem;
    color: var(--ds-text-muted);
    transition: color 0.2s;
}
.ds-theme-toggle:hover { color: var(--ds-primary); }

/* ── Cards ── */
.ds-card {
    background: var(--ds-surface);
    border: 1px solid var(--ds-border);
    border-radius: 0.75rem;
    box-shadow: var(--ds-card-shadow);
    transition: box-shadow 0.2s, transform 0.15s;
}
.ds-card:hover { box-shadow: var(--ds-card-shadow-hover); }
.ds-card .card-header {
    background: transparent;
    border-bottom: 1px solid var(--ds-border);
    padding: 0.75rem 1rem;
}

/* ── Hero Section ── */
.ds-hero {
    background: var(--ds-hero-gradient);
    padding: 4rem 0 3rem;
}
.ds-hero-icon {
    font-size: 3.5rem;
    color: var(--ds-primary);
    margin-bottom: 0.5rem;
    display: inline-block;
}

/* ── Steps Section ── */
.ds-step-card {
    padding: 1.5rem 1rem;
    position: relative;
}
.ds-step-num {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--ds-primary);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
    margin-bottom: 0.75rem;
}
.ds-step-icon {
    font-size: 2rem;
    color: var(--ds-primary);
    margin-bottom: 0.5rem;
}

/* ── Features Section ── */
.ds-features-bg {
    background: var(--ds-surface);
    border-top: 1px solid var(--ds-border);
    border-bottom: 1px solid var(--ds-border);
}
.ds-feature-card {
    border-radius: 0.75rem;
    transition: background 0.2s;
    height: 100%;
}
.ds-feature-card:hover { background: var(--ds-surface-hover); }
.ds-feature-icon {
    font-size: 1.75rem;
    color: var(--ds-primary);
}

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

/* ── Dropzone ── */
.ds-dropzone {
    border: 2px dashed var(--ds-dropzone-border);
    border-radius: 0.75rem;
    background: var(--ds-dropzone-bg);
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
}
.ds-dropzone:hover,
.ds-dropzone.dragover {
    border-color: var(--ds-primary);
    background: rgba(var(--ds-primary-rgb), 0.05);
}

/* ── Preview Container ── */
.ds-preview-container {
    position: relative;
    background: var(--ds-preview-bg);
    border-radius: 0.5rem;
    overflow: hidden;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--ds-border);
}
.ds-preview-img {
    max-width: 100%;
    max-height: 500px;
    display: block;
    margin: 0 auto;
}
.ds-preview-loader {
    position: absolute;
    inset: 0;
    background: rgba(var(--ds-primary-rgb), 0.05);
    backdrop-filter: blur(4px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 5;
}

/* ── Document Queue ── */
.ds-doc-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--ds-border);
    cursor: pointer;
    transition: background 0.15s;
}
.ds-doc-item:hover { background: var(--ds-surface-hover); }
.ds-doc-item.active {
    background: rgba(var(--ds-primary-rgb), 0.08);
    border-left: 3px solid var(--ds-primary);
}
.ds-doc-thumb {
    width: 48px;
    height: 48px;
    object-fit: cover;
    border-radius: 0.375rem;
    flex-shrink: 0;
    border: 1px solid var(--ds-border);
}
.ds-doc-info { flex: 1; min-width: 0; }
.ds-doc-info .name { font-size: 0.85rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ds-doc-info .meta { font-size: 0.75rem; color: var(--ds-text-muted); }

/* ── Export Card ── */
.ds-export-card {
    background: var(--ds-dropzone-bg);
    border: 1px solid var(--ds-border);
    border-radius: 0.5rem;
}

/* ── History ── */
.ds-thumb-wrap {
    position: relative;
    overflow: hidden;
    aspect-ratio: 4/3;
    background: var(--ds-preview-bg);
}
.ds-thumb {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ── Toasts ── */
.toast {
    border-radius: 0.5rem;
}

/* ── Buttons ── */
.ds-tool {
    font-size: 0.85rem;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--ds-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--ds-text-muted); }

/* ── Responsive ── */
@media (max-width: 767.98px) {
    .ds-hero { padding: 2.5rem 0 2rem; }
    .ds-hero .display-4 { font-size: 1.75rem; }
    .ds-hero-icon { font-size: 2.5rem; }
    .ds-preview-img { max-height: 300px; }
}

/* ── Print ── */
@media print {
    .ds-navbar, .ds-footer, .ds-theme-toggle, .btn { display: none !important; }
}