@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;600&family=IBM+Plex+Sans:wght@300;400;600&display=swap');

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:       #0d0f14;
  --surface:  #161921;
  --border:   #262c3a;
  --text:     #e2e8f0;
  --muted:    #64748b;
  --accent:   #3b82f6;
  --success:  #22c55e;
  --warn:     #f59e0b;
  --danger:   #ef4444;
  --mono:     'IBM Plex Mono', monospace;
  --sans:     'IBM Plex Sans', sans-serif;
  --radius:   6px;
}

html, body { height: 100%; background: var(--bg); color: var(--text); font-family: var(--sans); font-size: 14px; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Layout ─────────────────────────────────────────────────── */
.page        { min-height: 100vh; display: flex; flex-direction: column; }
.topbar      { height: 48px; background: var(--surface); border-bottom: 1px solid var(--border);
               display: flex; align-items: center; padding: 0 20px; gap: 16px; flex-shrink: 0; }
.topbar .logo { font-family: var(--mono); font-weight: 600; font-size: 13px; color: var(--accent); letter-spacing: 1px; }
.topbar .spacer { flex: 1; }
.topbar .user  { font-family: var(--mono); font-size: 12px; color: var(--muted); }

.container   { max-width: 1200px; margin: 0 auto; padding: 32px 24px; flex: 1; }
.container-wide { max-width: 1600px; margin: 0 auto; padding: 24px; flex: 1; }

/* ── Cards ──────────────────────────────────────────────────── */
.card        { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.card-header { padding: 14px 18px; border-bottom: 1px solid var(--border);
               font-family: var(--mono); font-size: 11px; font-weight: 600;
               letter-spacing: 1px; color: var(--muted); text-transform: uppercase; }
.card-body   { padding: 18px; }

/* ── Grid ───────────────────────────────────────────────────── */
.grid-2  { display: grid; grid-template-columns: 1fr 1fr;     gap: 16px; }
.grid-3  { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
.grid-4  { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; }

/* ── Buttons ────────────────────────────────────────────────── */
.btn      { display: inline-flex; align-items: center; gap: 6px; padding: 7px 14px;
            border: 1px solid var(--border); border-radius: var(--radius);
            font-family: var(--sans); font-size: 13px; font-weight: 600;
            cursor: pointer; transition: all .15s; background: transparent; color: var(--text); }
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn-primary  { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: #2563eb; border-color: #2563eb; color: #fff; text-decoration: none; }
.btn-success  { background: var(--success); border-color: var(--success); color: #000; }
.btn-danger   { background: var(--danger);  border-color: var(--danger);  color: #fff; }
.btn-sm       { padding: 4px 10px; font-size: 12px; }
.btn-icon     { padding: 6px 10px; }

/* ── Forms ──────────────────────────────────────────────────── */
.form-group   { margin-bottom: 16px; }
label         { display: block; font-size: 12px; font-weight: 600; color: var(--muted);
                margin-bottom: 6px; letter-spacing: .5px; text-transform: uppercase; font-family: var(--mono); }
input, select, textarea {
  width: 100%; padding: 8px 12px; background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius); color: var(--text); font-family: var(--sans); font-size: 14px;
  outline: none; transition: border-color .15s;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); }

/* ── Tables ─────────────────────────────────────────────────── */
table          { width: 100%; border-collapse: collapse; }
th             { font-family: var(--mono); font-size: 11px; letter-spacing: 1px; color: var(--muted);
                 text-transform: uppercase; padding: 10px 14px; text-align: left;
                 border-bottom: 1px solid var(--border); }
td             { padding: 10px 14px; border-bottom: 1px solid var(--border); font-size: 13px; }
tr:last-child td { border-bottom: none; }
tr:hover td    { background: rgba(255,255,255,.02); }

/* ── Badges ─────────────────────────────────────────────────── */
.badge        { display: inline-block; padding: 2px 8px; border-radius: 999px;
                font-family: var(--mono); font-size: 11px; font-weight: 600; }
.badge-pending   { background: rgba(100,116,139,.2); color: var(--muted); }
.badge-in_progress { background: rgba(251,191,36,.15); color: var(--warn); }
.badge-done      { background: rgba(34,197,94,.15);  color: var(--success); }
.badge-admin     { background: rgba(59,130,246,.15); color: var(--accent); }

/* ── Progress bar ───────────────────────────────────────────── */
.progress-track { height: 4px; background: var(--border); border-radius: 2px; overflow: hidden; }
.progress-bar   { height: 100%; background: var(--accent); transition: width .4s; }

/* ── Stats ──────────────────────────────────────────────────── */
.stat         { text-align: center; padding: 16px; }
.stat-value   { font-family: var(--mono); font-size: 28px; font-weight: 600; color: var(--text); }
.stat-label   { font-size: 11px; color: var(--muted); margin-top: 4px; text-transform: uppercase; letter-spacing: .5px; }

/* ── Frame grid (batch view) ────────────────────────────────── */
.frame-grid  { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 8px; }
.frame-thumb { position: relative; cursor: pointer; border-radius: var(--radius);
               overflow: hidden; border: 2px solid var(--border); transition: border-color .15s; }
.frame-thumb:hover    { border-color: var(--accent); }
.frame-thumb.annotated { border-color: var(--success); }
.frame-thumb.skipped  { border-color: var(--muted); opacity: .5; }
.frame-thumb img      { width: 100%; display: block; aspect-ratio: 16/9; object-fit: cover; }
.frame-label          { position: absolute; bottom: 0; left: 0; right: 0; padding: 3px 6px;
                        background: rgba(0,0,0,.7); font-family: var(--mono); font-size: 10px; color: var(--muted); }
.frame-del   { position: absolute; top: 4px; right: 4px; background: var(--danger); color: #fff;
               border: none; border-radius: 50%; width: 20px; height: 20px; cursor: pointer;
               font-size: 12px; display: none; align-items: center; justify-content: center; }
.frame-thumb:hover .frame-del { display: flex; }

/* ── Annotation page ────────────────────────────────────────── */
.annotate-layout { display: flex; height: calc(100vh - 48px); overflow: hidden; }
.annotate-sidebar { width: 220px; flex-shrink: 0; background: var(--surface); border-right: 1px solid var(--border);
                    display: flex; flex-direction: column; padding: 16px 12px; gap: 16px; overflow-y: auto; }
.annotate-main   { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
.annotate-canvas-wrap { flex: 1; overflow: hidden; display: flex; align-items: center; justify-content: center;
                        background: #090b0f; position: relative; }
#canvas-container    { position: relative; display: inline-block; }
#bg-image            { display: block; user-select: none; pointer-events: none; }
#canvas              { position: absolute; top: 0; left: 0; cursor: crosshair; }
.annotate-footer     { height: 52px; background: var(--surface); border-top: 1px solid var(--border);
                       display: flex; align-items: center; padding: 0 16px; gap: 10px; flex-shrink: 0; }

.class-btn   { width: 100%; text-align: left; padding: 7px 10px; border: 1px solid var(--border);
               border-radius: var(--radius); cursor: pointer; background: transparent;
               color: var(--text); font-size: 13px; font-family: var(--sans); transition: all .12s;
               display: flex; align-items: center; gap: 8px; }
.class-btn:hover { border-color: var(--accent); }
.class-btn.active { border-width: 2px; font-weight: 600; }
.class-swatch     { width: 10px; height: 10px; border-radius: 2px; flex-shrink: 0; }
.class-key        { margin-left: auto; font-family: var(--mono); font-size: 10px;
                    color: var(--muted); background: var(--border); padding: 1px 5px; border-radius: 3px; }
.mode-btn         { transition: all .12s; }
.mode-btn.active  { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }

.frame-counter { font-family: var(--mono); font-size: 13px; color: var(--muted); }
.frame-counter span { color: var(--text); font-weight: 600; }
.spacer { flex: 1; }

.shortcuts { font-family: var(--mono); font-size: 10px; color: var(--muted); line-height: 1.8; }
.shortcuts b { color: var(--text); }

/* ── Toast ──────────────────────────────────────────────────── */
.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px);
         background: var(--surface); border: 1px solid var(--border); color: var(--text);
         padding: 8px 18px; border-radius: 999px; font-size: 13px;
         opacity: 0; transition: all .25s; pointer-events: none; z-index: 999; white-space: nowrap; }
.toast.show    { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.warn    { border-color: var(--warn); color: var(--warn); }
.toast.error   { border-color: var(--danger); color: var(--danger); }

/* ── Save indicator ─────────────────────────────────────────── */
#save-indicator { position: fixed; top: 60px; right: 16px; background: var(--success);
                  color: #000; font-family: var(--mono); font-size: 11px; font-weight: 600;
                  padding: 4px 10px; border-radius: 4px; opacity: 0; transition: opacity .3s; }
#save-indicator.visible { opacity: 1; }

/* ── Login ──────────────────────────────────────────────────── */
.login-wrap  { min-height: 100vh; display: flex; align-items: center; justify-content: center; }
.login-card  { width: 360px; }
.login-logo  { font-family: var(--mono); font-size: 20px; font-weight: 600; color: var(--accent);
               letter-spacing: 2px; margin-bottom: 4px; }
.login-sub   { font-size: 12px; color: var(--muted); margin-bottom: 28px; }

/* ── Utils ──────────────────────────────────────────────────── */
.mt-8  { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-8  { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.flex  { display: flex; }
.items-center { align-items: center; }
.gap-8  { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.text-muted  { color: var(--muted); }
.text-small  { font-size: 12px; }
.text-mono   { font-family: var(--mono); }
.font-600    { font-weight: 600; }
.w-full      { width: 100%; }
.error-msg   { color: var(--danger); font-size: 13px; padding: 8px 12px;
               background: rgba(239,68,68,.1); border-radius: var(--radius); margin-bottom: 12px; }

/* ── Preview grid (upload page) ─────────────────────────────── */
.preview-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 6px; margin-top: 12px; }
.preview-grid img { width: 100%; aspect-ratio: 16/9; object-fit: cover; border-radius: 4px; }

/* ── Modal ──────────────────────────────────────────────────── */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.7); display: flex;
                 align-items: center; justify-content: center; z-index: 100; }
.modal         { background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
                 width: 480px; max-width: 95vw; padding: 24px; }
.modal h3      { font-size: 16px; font-weight: 600; margin-bottom: 20px; }
.modal-actions { display: flex; gap: 10px; margin-top: 20px; justify-content: flex-end; }