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

:root {
    --color-primary: #4f46e5;
    --color-primary-dark: #4338ca;
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-border: #e2e8f0;
    --color-text: #1e293b;
    --color-text-muted: #64748b;
    --color-labeled: #16a34a;
    --color-labeled-bg: #dcfce7;
    --color-partial: #d97706;
    --color-partial-bg: #fef9c3;
    --color-unlabeled: #64748b;
    --color-unlabeled-bg: #f1f5f9;
    --color-danger: #dc2626;
    --color-danger-bg: #fee2e2;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
}

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

/* ─── Buttons ──────────────────────────────────────────────────────────────── */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 7px 14px;
    border-radius: var(--radius); border: 1px solid transparent; cursor: pointer;
    font-size: 13px; font-weight: 500; transition: all 0.15s; text-decoration: none; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary   { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.btn-primary:hover:not(:disabled) { background: var(--color-primary-dark); }

.btn-secondary { background: var(--color-surface); color: var(--color-text); border-color: var(--color-border); }
.btn-secondary:hover:not(:disabled) { background: var(--color-bg); }

.btn-success   { background: var(--color-labeled); color: #fff; border-color: var(--color-labeled); }
.btn-success:hover:not(:disabled) { background: #15803d; }

.btn-danger    { background: var(--color-danger); color: #fff; border-color: var(--color-danger); }
.btn-danger:hover:not(:disabled) { background: #b91c1c; }

.btn-sm { padding: 4px 10px; font-size: 12px; }

/* ─── Status badges ────────────────────────────────────────────────────────── */
.badge { display: inline-block; padding: 2px 8px; border-radius: 99px;
    font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; }
.badge-labeled   { background: var(--color-labeled-bg);   color: var(--color-labeled); }
.badge-partial   { background: var(--color-partial-bg);   color: var(--color-partial); }
.badge-unlabeled { background: var(--color-unlabeled-bg); color: var(--color-unlabeled); }

/* ─── Header ───────────────────────────────────────────────────────────────── */
.app-header { background: var(--color-surface); border-bottom: 1px solid var(--color-border);
    padding: 0 20px; display: flex; align-items: center; gap: 16px; height: 52px;
    position: sticky; top: 0; z-index: 100; box-shadow: var(--shadow); }

.app-header h1 { font-size: 16px; font-weight: 700; color: var(--color-primary); flex: 1; }
.app-header .user-info { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--color-text-muted); }
.app-header .user-info img { width: 26px; height: 26px; border-radius: 50%; }

/* ─── Stats bar ────────────────────────────────────────────────────────────── */
.stats-bar { display: flex; align-items: center; gap: 8px; padding: 12px 20px;
    background: var(--color-surface); border-bottom: 1px solid var(--color-border); flex-wrap: wrap; }
.stat-card { display: flex; flex-direction: column; align-items: center; padding: 8px 20px;
    border-radius: var(--radius); border: 1px solid var(--color-border); min-width: 90px; }
.stat-card .stat-value { font-size: 22px; font-weight: 700; }
.stat-card .stat-label { font-size: 11px; color: var(--color-text-muted); text-transform: uppercase; }
.stat-card.labeled   { border-color: var(--color-labeled);   }
.stat-card.partial   { border-color: var(--color-partial);   }
.stat-card.unlabeled { border-color: var(--color-unlabeled); }
.stat-card.labeled   .stat-value { color: var(--color-labeled);   }
.stat-card.partial   .stat-value { color: var(--color-partial);   }
.stat-card.unlabeled .stat-value { color: var(--color-unlabeled); }
.stats-bar .spacer { flex: 1; }

/* ─── Toolbar / filter tabs ────────────────────────────────────────────────── */
.toolbar { padding: 10px 20px; display: flex; align-items: center; gap: 8px;
    border-bottom: 1px solid var(--color-border); flex-wrap: wrap; }
.tab { padding: 5px 14px; border-radius: 99px; border: 1px solid var(--color-border);
    background: var(--color-surface); cursor: pointer; font-size: 13px; font-weight: 500; transition: all 0.12s; }
.tab:hover  { background: var(--color-bg); }
.tab.active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

/* ─── Table ────────────────────────────────────────────────────────────────── */
.table-wrap { padding: 16px 20px; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; background: var(--color-surface);
    border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
thead th { background: var(--color-bg); padding: 10px 14px; text-align: left;
    font-size: 12px; font-weight: 600; color: var(--color-text-muted); text-transform: uppercase;
    border-bottom: 1px solid var(--color-border); }
tbody tr { border-bottom: 1px solid var(--color-border); transition: background 0.1s; }
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: #f8faff; }
tbody td { padding: 10px 14px; font-size: 13px; }
tbody tr.clickable { cursor: pointer; }

/* ─── Modal overlay ────────────────────────────────────────────────────────── */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.45); z-index: 200;
    display: flex; align-items: center; justify-content: center; }
.modal-overlay.hidden { display: none; }
.modal-box { background: var(--color-surface); border-radius: var(--radius); padding: 28px;
    width: 460px; max-width: 96vw; box-shadow: var(--shadow-md); }
.modal-box h2 { margin-bottom: 16px; font-size: 17px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 20px; }

/* ─── Alerts ───────────────────────────────────────────────────────────────── */
.alert { padding: 10px 14px; border-radius: var(--radius); font-size: 13px; margin-top: 10px; }
.alert-success { background: var(--color-labeled-bg); color: var(--color-labeled); }
.alert-error   { background: var(--color-danger-bg);  color: var(--color-danger);  }
.alert.hidden  { display: none; }

/* ─── File input ───────────────────────────────────────────────────────────── */
.file-drop { border: 2px dashed var(--color-border); border-radius: var(--radius);
    padding: 24px; text-align: center; color: var(--color-text-muted); cursor: pointer; transition: border-color 0.15s; }
.file-drop:hover, .file-drop.drag-over { border-color: var(--color-primary); color: var(--color-primary); }
.file-drop input[type=file] { display: none; }
.file-drop .filename { margin-top: 8px; font-weight: 600; color: var(--color-text); }

/* ─── Label view layout ────────────────────────────────────────────────────── */
.label-layout { display: flex; height: calc(100vh - 52px); overflow: hidden; }

/* Left panel — form */
.form-panel { width: 50%; min-width: 420px; max-width: none; display: flex; flex-direction: column;
    border-right: 1px solid var(--color-border); background: var(--color-surface); flex-shrink: 0; }
.form-panel-toolbar { padding: 10px 16px; border-bottom: 1px solid var(--color-border);
    display: flex; align-items: center; gap: 8px; flex-wrap: wrap; background: var(--color-bg); }
.form-panel-body { flex: 1; overflow-y: auto; padding: 14px 18px; }

/* Right panel — image */
.image-panel { flex: 1; display: flex; flex-direction: column; overflow: hidden; background: #2d2d2d; }
.image-toolbar { padding: 8px 14px; background: #1e1e1e; display: flex; align-items: center; gap: 10px;
    border-bottom: 1px solid #444; color: #ccc; font-size: 12px; flex-shrink: 0; }
.image-toolbar .zoom-info { min-width: 60px; text-align: center; font-family: monospace; }
.image-container { flex: 1; overflow: hidden; cursor: grab; position: relative; user-select: none; }
.image-container.grabbing { cursor: grabbing; }
.image-container img { display: block; max-width: none; user-select: none; transform-origin: top left; }

/* ─── Form sections ────────────────────────────────────────────────────────── */
.form-section { margin-bottom: 14px; border: 1px solid var(--color-border);
    border-radius: var(--radius); overflow: hidden; }
.form-section-title { padding: 8px 14px; background: var(--color-bg); font-size: 12px;
    font-weight: 700; color: var(--color-text-muted); text-transform: uppercase;
    letter-spacing: 0.05em; border-bottom: 1px solid var(--color-border); }
.form-section-body { padding: 12px 14px; }

.form-row { display: flex; align-items: center; gap: 10px; margin-bottom: 9px; }
.form-row:last-child { margin-bottom: 0; }
.form-row label { width: 110px; flex-shrink: 0; font-size: 12px; color: var(--color-text-muted); }
.form-row input { flex: 1; padding: 6px 10px; border: 1px solid var(--color-border);
    border-radius: 5px; font-size: 13px; background: var(--color-bg); color: var(--color-text); outline: none; }
.form-row input:focus { border-color: var(--color-primary); background: #fff; }

/* Dynamic rows */
.dyn-rows { display: flex; flex-direction: column; gap: 4px; }
.dyn-row  { display: flex; align-items: center; gap: 4px; flex-wrap: nowrap;
    background: var(--color-bg); border-radius: 5px; padding: 5px 6px; border: 1px solid var(--color-border); }
.dyn-row input { padding: 4px 6px; border: 1px solid var(--color-border); border-radius: 4px; font-size: 12px;
    background: #fff; color: var(--color-text); min-width: 0; }
.dyn-row label { font-size: 11px; color: var(--color-text-muted); white-space: nowrap; }

.item-card { border: 1px solid var(--color-border); border-radius: var(--radius);
    margin-bottom: 6px; overflow: hidden; }
.item-card-header { display: flex; align-items: center; gap: 6px; padding: 6px 8px;
    background: var(--color-bg); border-bottom: 1px solid var(--color-border); }
.item-card-header input { flex: 1; padding: 4px 6px; border: 1px solid var(--color-border);
    border-radius: 4px; font-size: 13px; }
.item-card-body { display: flex; flex-wrap: wrap; gap: 4px; padding: 6px 8px; }
.item-field { display: flex; flex-direction: column; gap: 2px; }
.item-field label { font-size: 10px; color: var(--color-text-muted); }
.item-field input { width: 72px; padding: 4px 6px; border: 1px solid var(--color-border);
    border-radius: 4px; font-size: 12px; }

/* Save bar at bottom of form */
.save-bar { padding: 10px 14px; border-top: 1px solid var(--color-border);
    background: var(--color-bg); display: flex; gap: 8px; align-items: center; }
.save-bar .save-status { flex: 1; font-size: 12px; }

/* ─── Loading overlay ──────────────────────────────────────────────────────── */
.loading { display: flex; align-items: center; justify-content: center; height: 200px;
    color: var(--color-text-muted); font-size: 14px; }

/* ─── Review drawer ────────────────────────────────────────────────────────── */
.review-drawer { position: fixed; top: 0; left: 0; width: 340px; height: 100vh;
    background: var(--color-surface); border-right: 1px solid var(--color-border);
    box-shadow: var(--shadow-md); z-index: 200; display: flex; flex-direction: column;
    transform: translateX(-100%); transition: transform 0.22s ease; }
.review-drawer.open { transform: translateX(0); }
.review-drawer-header { padding: 14px 16px; border-bottom: 1px solid var(--color-border);
    display: flex; align-items: center; gap: 8px; }
.review-drawer-header h2 { font-size: 15px; font-weight: 600; flex: 1; }
.review-search { padding: 10px 12px; border-bottom: 1px solid var(--color-border); }
.review-search input { width: 100%; padding: 6px 10px; border: 1px solid var(--color-border);
    border-radius: var(--radius); font-size: 13px; outline: none; }
.review-search input:focus { border-color: var(--color-primary); }
.review-list { flex: 1; overflow-y: auto; }
.review-item { padding: 10px 14px; border-bottom: 1px solid var(--color-border);
    cursor: pointer; transition: background 0.1s; }
.review-item:hover { background: var(--color-bg); }
.review-item.active { background: #eff6ff; border-left: 3px solid var(--color-primary); }
.review-item-id { font-size: 12px; font-weight: 600; color: var(--color-text);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.review-item-meta { font-size: 11px; color: var(--color-text-muted); margin-top: 2px; }
.review-backdrop { position: fixed; inset: 0; background: rgba(0,0,0,0.25); z-index: 199;
    display: none; }
.review-backdrop.open { display: block; }