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

:root {
    --header-h: 52px;
    --sidebar-w: 280px;
    --border: #e5e5e5;
    --bg: #f7f7f7;
    --text: #111;
    --muted: #888;
    --radius: 7px;
}

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
    line-height: 1.5;
}

/* ─── Fixed Header ───────────────────────────────────── */
.header {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--header-h);
    background: #111;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    z-index: 500;
    border-bottom: 1px solid #222;
}

.header h1 {
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    white-space: nowrap;
}

.header .nav-links {
    display: flex;
    align-items: center;
    gap: 2px;
}

.header .nav-links a {
    color: #999;
    text-decoration: none;
    padding: 5px 11px;
    border-radius: 5px;
    font-size: 0.82rem;
    font-weight: 500;
    transition: color 0.12s, background 0.12s;
    white-space: nowrap;
}

.header .nav-links a:hover { color: #fff; background: #1e1e1e; }
.header .nav-links .active  { color: #fff; background: #2a2a2a; }

.header .user-info {
    font-size: 0.78rem;
    color: #555;
    padding: 0 10px;
    white-space: nowrap;
}

/* ─── Page Shell ─────────────────────────────────────── */
.page-shell {
    padding-top: var(--header-h);
    min-height: 100vh;
}

/* ─── Standard content pages ─────────────────────────── */
.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 28px 24px;
}

/* ─── Flash messages ─────────────────────────────────── */
.flash-messages { margin-bottom: 16px; }

.flash-messages .alert {
    padding: 10px 14px;
    border-radius: var(--radius);
    font-size: 0.85rem;
    margin-bottom: 6px;
    border: 1px solid transparent;
}

.alert-danger  { background: #fef2f2; color: #dc2626; border-color: #fecaca; }
.alert-success { background: #f0fdf4; color: #16a34a; border-color: #bbf7d0; }
.alert-warning { background: #fffbeb; color: #b45309; border-color: #fde68a; }

/* ─── Cards ──────────────────────────────────────────── */
.card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 14px;
}

.card h3 {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
    margin-bottom: 14px;
}

/* ─── Buttons ────────────────────────────────────────── */
button, .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 7px 15px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.83rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    background: #fff;
    color: var(--text);
    transition: background 0.12s, border-color 0.12s, color 0.12s;
    white-space: nowrap;
    line-height: 1;
}

button:hover, .btn:hover { background: #f5f5f5; border-color: #bbb; }
button:active, .btn:active { background: #eee; }
button:disabled, button:disabled:hover { opacity: 0.38; cursor: not-allowed; background: #fff; }

.btn-primary, .btn-primary:hover { background: #111; color: #fff; border-color: #111; }
.btn-primary:hover { background: #222; border-color: #222; }

.btn-secondary { background: #fff; color: #111; border-color: var(--border); }
.btn-secondary:hover { background: #f5f5f5; }

.btn-success { background: #fff; color: #16a34a; border-color: #86efac; }
.btn-success:hover { background: #f0fdf4; }

.btn-danger  { background: #fff; color: #dc2626; border-color: #fca5a5; }
.btn-danger:hover  { background: #fef2f2; }

.btn-info    { background: #fff; color: #0284c7; border-color: #bae6fd; }
.btn-info:hover    { background: #f0f9ff; }

.btn-warning { background: #111; color: #fff; border-color: #111; }
.btn-warning:hover { background: #222; border-color: #222; }

.btn-sm { padding: 4px 10px; font-size: 0.76rem; }
.btn-lg { padding: 11px 28px; font-size: 0.95rem; font-weight: 600; }

/* ─── Tables ─────────────────────────────────────────── */
table { width: 100%; border-collapse: collapse; font-size: 0.84rem; }

table th {
    padding: 8px 12px;
    text-align: left;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--muted);
    border-bottom: 1px solid var(--border);
    background: #fafafa;
}

table td { padding: 10px 12px; border-bottom: 1px solid #f0f0f0; color: #333; }
table tr:last-child td { border-bottom: none; }
table tr:hover td { background: #fafafa; }

/* ─── Forms ──────────────────────────────────────────── */
.form-group { margin-bottom: 14px; }

.form-group label {
    display: block;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--muted);
    margin-bottom: 5px;
}

input[type="text"], input[type="password"], input[type="number"], select, textarea {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: var(--radius);
    font-size: 0.86rem;
    color: var(--text);
    background: #fff;
    transition: border-color 0.15s, box-shadow 0.15s;
    outline: none;
    width: 100%;
}

input:focus, select:focus, textarea:focus {
    border-color: #111;
    box-shadow: 0 0 0 3px rgba(0,0,0,0.06);
}

/* ─── Badges ─────────────────────────────────────────── */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 99px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border: 1px solid transparent;
}

.badge-pending   { background: #f0f0f0; color: #555; }
.badge-annotated { background: #fffbeb; color: #b45309; border-color: #fde68a; }
.badge-approved  { background: #f0fdf4; color: #16a34a; border-color: #bbf7d0; }
.badge-rejected  { background: #fef2f2; color: #dc2626; border-color: #fecaca; }
.badge-admin     { background: #111; color: #fff; }
.badge-oa        { background: #f0f0f0; color: #111; }
.badge-annotator { background: #f5f5f5; color: #555; }

/* ─── Progress bar ───────────────────────────────────── */
.progress-bar-container {
    background: #f0f0f0;
    border-radius: 99px;
    height: 5px;
    overflow: hidden;
    margin: 10px 0;
}

.progress-bar-fill {
    height: 100%;
    background: #111;
    border-radius: 99px;
    transition: width 0.5s ease;
    min-width: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: transparent;
    font-size: 0;
}

/* ─── Stat numbers ───────────────────────────────────── */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}

.stat-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 20px;
    text-align: center;
}

.stat-card .label {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--muted);
    margin-bottom: 6px;
}

.stat-card .value {
    font-size: 2rem;
    font-weight: 700;
    color: #111;
    line-height: 1;
}

.stat-card .value.green { color: #16a34a; }
.stat-card .value.amber { color: #b45309; }
.stat-card .value.red   { color: #dc2626; }
.stat-card .value.muted { color: #999; }

/* ─── Image Grid ─────────────────────────────────────── */
.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
    gap: 10px;
    padding: 0;
}

.grid-card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    cursor: pointer;
    transition: box-shadow 0.15s, transform 0.12s;
    background: #fff;
}

.grid-card:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.09);
    transform: translateY(-2px);
}

.grid-card img {
    width: 100%;
    height: 150px;
    object-fit: cover;
    background: #f5f5f5;
    display: block;
}

.grid-card .card-info {
    padding: 8px 10px;
    font-size: 0.72rem;
    color: var(--muted);
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    border-top: 1px solid #f5f5f5;
}
.grid-card .card-detail {
    font-size: 0.66rem;
    color: #999;
    margin-top: 2px;
}

.grid-card.status-pending   { border-top: 2px solid #ddd; }
.grid-card.status-annotated { border-top: 2px solid #f59e0b; }
.grid-card.status-approved  { border-top: 2px solid #22c55e; }
.grid-card.status-rejected  { border-top: 2px solid #ef4444; }

.grid-pager { grid-column: 1 / -1; text-align: center; padding: 12px; }

/* ─── Controls bar ───────────────────────────────────── */
.controls {
    padding: 10px 24px;
    background: #fff;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.nav-buttons { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.image-info { font-size: 0.84rem; font-weight: 500; color: #555; }

/* ─── ANNOTATION PAGE ────────────────────────────────── */
.annotate-layout {
    display: flex;
    height: calc(100vh - var(--header-h));
    overflow: hidden;
}

/* Left: canvas area */
.annotate-canvas-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: #ebebeb;
    min-width: 0;
}

.annotate-toolbar {
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 8px 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.annotate-toolbar .divider {
    width: 1px;
    height: 20px;
    background: var(--border);
    margin: 0 4px;
}

.annotate-toolbar .shortcut {
    font-size: 0.7rem;
    color: var(--muted);
    background: #f5f5f5;
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1px 5px;
    font-family: monospace;
}

.canvas-scroll {
    flex: 1;
    overflow: auto;
    display: flex;
    align-items: safe center;
    justify-content: safe center;
    padding: 20px;
    min-height: 0;
    position: relative;
}

.canvas-wrapper {
    position: relative;
    display: inline-block;
    border: 1px solid #ddd;
    border-radius: 6px;
    box-shadow: 0 2px 16px rgba(0,0,0,0.1);
    background: #fff;
    pointer-events: none;
    line-height: 0;
    margin: auto;
    flex-shrink: 0;
}

.zoom-badge {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    background: #f1f1f1;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 2px 6px;
    user-select: none;
    margin-left: 0;
    order: 1;
}
.zoom-badge span {
    cursor: default;
    min-width: 36px;
    text-align: center;
    font-size: 0.78rem;
    font-weight: 600;
    color: #333;
}
.zoom-badge button {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    padding: 2px 6px;
    line-height: 1;
    color: #555;
    border-radius: 3px;
}
.zoom-badge button:hover {
    background: #e0e0e0;
    color: #111;
}

.canvas-wrapper canvas {
    pointer-events: auto;
    display: block;
}

#annotationCanvas {
    /* JS sets explicit width/height via _fitToContainer() after load */
    display: block;
    cursor: crosshair;
    touch-action: none;
    user-select: none;
}

/* Right: sidebar */
.annotate-sidebar {
    width: var(--sidebar-w);
    flex-shrink: 0;
    background: #fff;
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-section {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.sidebar-section h4 {
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
    margin-bottom: 10px;
}

.sidebar-meta { font-size: 0.82rem; color: #555; line-height: 1.8; }
.sidebar-meta strong { color: #111; }

.ann-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px 0;
}

.ann-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 16px;
    font-size: 0.82rem;
    border-bottom: 1px solid #f5f5f5;
}

.ann-color {
    width: 10px;
    height: 10px;
    border-radius: 2px;
    flex-shrink: 0;
}

.ann-label { flex: 1; color: #333; }

.ann-remove {
    color: #ccc;
    cursor: pointer;
    font-size: 0.9rem;
    transition: color 0.1s;
    background: none;
    border: none;
    padding: 2px 4px;
}
.ann-remove:hover { color: #ef4444; background: none; border: none; }

/* Draw mode active state */
.draw-active { background: #111 !important; color: #fff !important; border-color: #111 !important; }

/* ─── Class Selector (in sidebar for annotation, modal for review) ── */
.class-selector {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 8px 40px rgba(0,0,0,0.15);
    border: 1px solid var(--border);
    z-index: 600;
    display: none;
    max-width: 480px;
    width: 90vw;
    max-height: 80vh;
    overflow-y: auto;
}

.class-selector.show { display: block; }

.class-selector h3 {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
    margin-bottom: 14px;
}

.class-selector-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 7px;
}

.class-btn {
    padding: 9px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: #fff;
    color: #111;
    font-size: 0.82rem;
    font-weight: 500;
    cursor: pointer;
    text-align: left;
    transition: background 0.1s, color 0.1s;
}

.class-btn:hover { background: #111; color: #fff; border-color: #111; }

/* ─── Review page ────────────────────────────────────── */
.review-layout {
    display: flex;
    height: calc(100vh - var(--header-h));
    overflow: hidden;
}

.review-sidebar {
    width: 220px;
    flex-shrink: 0;
    background: #fff;
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 20px 16px;
    gap: 10px;
}

.review-sidebar .review-meta {
    font-size: 0.82rem;
    color: #555;
    line-height: 1.9;
    margin-bottom: 8px;
}

.review-sidebar .review-meta strong { color: #111; display: block; }

.review-approve {
    background: #111; color: #fff; border-color: #111;
    font-size: 0.9rem; padding: 12px; width: 100%;
    border-radius: var(--radius); justify-content: center;
}
.review-approve:hover { background: #222; }

.review-reject {
    background: #fff; color: #dc2626; border-color: #fca5a5;
    font-size: 0.9rem; padding: 12px; width: 100%;
    border-radius: var(--radius); justify-content: center;
}
.review-reject:hover { background: #fef2f2; }

.kbd {
    display: inline-block;
    background: #f0f0f0;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 1px 6px;
    font-size: 0.72rem;
    font-family: monospace;
    color: #555;
}

/* ─── Overlay ────────────────────────────────────────── */
.overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.35);
    z-index: 550;
    display: none;
}
.overlay.show { display: block; }

/* ─── Toast ──────────────────────────────────────────── */
.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #111;
    color: #fff;
    padding: 10px 18px;
    border-radius: var(--radius);
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    z-index: 1000;
    display: none;
    font-size: 0.84rem;
    font-weight: 500;
    animation: slideIn 0.18s ease;
}
.toast.show { display: block; }
.toast.success { border-left: 3px solid #22c55e; }
.toast.error   { border-left: 3px solid #ef4444; }

@keyframes slideIn {
    from { transform: translateX(100px); opacity: 0; }
    to   { transform: translateX(0); opacity: 1; }
}

/* ─── Login ──────────────────────────────────────────── */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 360px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 36px 32px;
}

.login-container h2 {
    font-size: 0.88rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    text-align: center;
    margin-bottom: 28px;
    color: var(--text);
}

/* ─── Section ────────────────────────────────────────── */
.section { padding: 0; }

/* ─── Browse modal ───────────────────────────────────── */
.browse-modal {
    position: fixed;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: 0 8px 40px rgba(0,0,0,0.14);
    z-index: 600;
    display: none;
    width: 500px;
    max-width: 95vw;
    max-height: 80vh;
    overflow: hidden;
    flex-direction: column;
}
.browse-modal.show { display: flex; }

.browse-modal-header {
    padding: 14px 18px 10px;
    border-bottom: 1px solid #f0f0f0;
}

.browse-modal-header h3 {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
    margin: 0 0 6px;
}

.browse-current-path {
    font-family: monospace;
    font-size: 11px;
    color: #555;
    background: #f5f5f5;
    padding: 5px 10px;
    border-radius: 5px;
    word-break: break-all;
}

.browse-modal-body { flex: 1; overflow-y: auto; max-height: 340px; }

.browse-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 18px;
    cursor: pointer;
    font-size: 0.86rem;
    color: #333;
    border-bottom: 1px solid #f5f5f5;
    transition: background 0.1s;
}
.browse-item:hover { background: #f5f5f5; }
.browse-item.parent-dir { color: #555; font-weight: 500; }
.browse-item .folder-icon { font-size: 14px; width: 18px; text-align: center; }

.browse-modal-footer {
    padding: 10px 18px;
    border-top: 1px solid #f0f0f0;
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    background: #fafafa;
}