:root {
  --bg: #14110d;
  --bg-soft: #1c1813;
  --card: #221d17;
  --card-hi: #2a241c;
  --border: #3a3226;
  --text: #f2e8d8;
  --muted: #b8a888;
  --accent: #d4a853;
  --accent-soft: #e8c882;
  --danger: #d97757;
  --ok: #7fb069;
  --radius: 16px;
  --ease: cubic-bezier(.16, 1, .3, 1);
  --shadow: 0 8px 30px rgba(0, 0, 0, .35);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #faf6ef;
    --bg-soft: #f3ece0;
    --card: #fffdf9;
    --card-hi: #fbf5ea;
    --border: #e6dcc9;
    --text: #2a2317;
    --muted: #6b5f49;
    --accent: #92400e;
    --accent-soft: #b45309;
    --shadow: 0 8px 30px rgba(60, 40, 10, .10);
  }
}

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

body {
  font-family: 'Nunito', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  padding: 0 0 80px;
}

h1, h2, h3, .display {
  font-family: 'Fraunces', Georgia, serif;
  font-weight: 600;
  line-height: 1.15;
}

.wrap { max-width: 820px; margin: 0 auto; padding: 0 18px; }

/* Header */
.masthead {
  padding: 34px 0 22px;
  text-align: center;
  border-bottom: 1px solid var(--border);
  margin-bottom: 26px;
}
.masthead .eyebrow {
  font-size: .78rem; letter-spacing: .14em; text-transform: uppercase;
  color: var(--accent); font-weight: 700; margin-bottom: 8px;
}
.masthead h1 { font-size: clamp(1.6rem, 5vw, 2.3rem); }
.masthead p { color: var(--muted); margin-top: 8px; font-size: .96rem; }

/* Stepper */
.steps { display: flex; gap: 8px; justify-content: center; margin: 20px 0 28px; flex-wrap: wrap; }
.step-pill {
  font-size: .8rem; padding: 6px 14px; border-radius: 999px;
  background: var(--card); border: 1px solid var(--border); color: var(--muted);
  transition: all .3s var(--ease);
}
.step-pill.active { background: var(--accent); color: #1a1206; border-color: var(--accent); font-weight: 700; }
.step-pill.done { color: var(--ok); border-color: var(--ok); }

/* Cards */
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 22px; margin-bottom: 18px;
  box-shadow: var(--shadow); transition: transform .3s var(--ease);
}
.section-title { font-size: 1.25rem; margin-bottom: 4px; }
.section-sub { color: var(--muted); font-size: .9rem; margin-bottom: 16px; }

/* Batch toggle */
.batch-row { display: flex; gap: 12px; margin-bottom: 18px; }
.batch-btn {
  flex: 1; padding: 16px; border-radius: 12px; border: 2px solid var(--border);
  background: var(--card-hi); color: var(--text); font-size: 1rem; font-weight: 700;
  cursor: pointer; transition: all .25s var(--ease); font-family: inherit;
}
.batch-btn.sel { border-color: var(--accent); background: var(--accent); color: #1a1206; }

/* Student chip picker */
.picker-search {
  width: 100%; padding: 13px 16px; border-radius: 12px; border: 1px solid var(--border);
  background: var(--bg-soft); color: var(--text); font-size: 1rem; font-family: inherit;
  margin-bottom: 12px;
}
.picker-search:focus { outline: none; border-color: var(--accent); }
.chip-grid { display: flex; flex-wrap: wrap; gap: 8px; max-height: 280px; overflow-y: auto; padding: 4px; }
.chip {
  padding: 9px 14px; border-radius: 999px; border: 1px solid var(--border);
  background: var(--card-hi); color: var(--text); font-size: .88rem; cursor: pointer;
  transition: all .2s var(--ease); user-select: none;
}
.chip:hover { border-color: var(--accent-soft); }
.chip.sel { background: var(--accent); color: #1a1206; border-color: var(--accent); font-weight: 700; }
.chip .rn { opacity: .6; font-size: .78rem; margin-left: 5px; }
.chip.used { opacity: .35; pointer-events: none; text-decoration: line-through; }

.selected-bar {
  margin-top: 14px; padding: 12px 14px; border-radius: 12px;
  background: var(--bg-soft); border: 1px dashed var(--border); font-size: .9rem;
}
.selected-bar b { color: var(--accent); }
.bench-id-badge {
  display: inline-block; margin-top: 10px; padding: 6px 14px; border-radius: 8px;
  background: var(--accent); color: #1a1206; font-weight: 800; letter-spacing: .05em;
}

/* Question cards */
.q-head { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; flex-wrap: wrap; }
.q-num {
  width: 30px; height: 30px; flex: none; border-radius: 8px; background: var(--accent);
  color: #1a1206; display: grid; place-items: center; font-weight: 800; font-family: 'Fraunces', serif;
}
.q-title { font-size: 1.08rem; font-weight: 700; font-family: 'Fraunces', serif; }
.tag {
  font-size: .72rem; padding: 3px 9px; border-radius: 6px; font-weight: 700;
  background: var(--card-hi); border: 1px solid var(--border); color: var(--muted);
}
.tag.freq { color: var(--accent); border-color: var(--accent); }
.q-prompt { color: var(--text); font-size: .95rem; margin: 6px 0 14px; opacity: .92; }

.answer-area {
  width: 100%; min-height: 130px; padding: 14px; border-radius: 12px;
  resize: vertical; overflow: hidden;
  border: 1px solid var(--border); background: var(--bg-soft); color: var(--text);
  font-size: 1rem; font-family: inherit; line-height: 1.6; resize: vertical;
}
.answer-area:focus { outline: none; border-color: var(--accent); }

/* Upload */
.uploader {
  margin-top: 12px; padding: 16px; border: 2px dashed var(--border); border-radius: 12px;
  text-align: center; color: var(--muted); cursor: pointer; transition: all .25s var(--ease);
  font-size: .9rem;
}
.uploader:hover, .uploader.drag { border-color: var(--accent); color: var(--accent); background: var(--card-hi); }
.thumbs { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }
.thumb { position: relative; width: 82px; height: 82px; border-radius: 10px; overflow: hidden; border: 1px solid var(--border); }
.thumb img { width: 100%; height: 100%; object-fit: cover; }
.thumb .x {
  position: absolute; top: 3px; right: 3px; width: 20px; height: 20px; border-radius: 50%;
  background: rgba(0,0,0,.7); color: #fff; border: none; cursor: pointer; font-size: .8rem; line-height: 1;
}

.autosave-note { font-size: .74rem; color: var(--muted); margin-top: 8px; text-align: right; }

/* Buttons */
.btn {
  display: inline-block; padding: 14px 28px; border-radius: 12px; border: none;
  background: var(--accent); color: #1a1206; font-size: 1rem; font-weight: 800;
  cursor: pointer; font-family: inherit; transition: all .25s var(--ease); width: 100%;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(212,168,83,.3); }
.btn:disabled { opacity: .45; cursor: not-allowed; transform: none; box-shadow: none; }
.btn.ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn.small { width: auto; padding: 10px 18px; font-size: .9rem; }

.hidden { display: none !important; }

/* Closed / status screens */
.status-screen { text-align: center; padding: 60px 22px; }
.status-screen .icon { font-size: 3rem; margin-bottom: 14px; }
.status-screen h2 { font-size: 1.5rem; margin-bottom: 10px; }
.status-screen p { color: var(--muted); max-width: 420px; margin: 0 auto; }

/* Reopen */
.reopen-row { display: flex; gap: 10px; margin-top: 10px; }
.reopen-row input { flex: 1; padding: 12px 14px; border-radius: 10px; border: 1px solid var(--border); background: var(--bg-soft); color: var(--text); font-family: inherit; }

/* Toast */
.toast {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%) translateY(120px);
  background: var(--card); border: 1px solid var(--border); color: var(--text);
  padding: 14px 22px; border-radius: 12px; box-shadow: var(--shadow); z-index: 99;
  transition: transform .4s var(--ease); max-width: 90vw; text-align: center;
}
.toast.show { transform: translateX(-50%) translateY(0); }
.toast.ok { border-color: var(--ok); }
.toast.err { border-color: var(--danger); }

.sticky-submit {
  position: sticky; bottom: 0; padding: 16px 0; background: linear-gradient(transparent, var(--bg) 30%);
  margin-top: 8px;
}

@media (max-width: 520px) {
  .card { padding: 17px; }
  .chip-grid { max-height: 240px; }
}

/* ── live-save UI (v3) ── */
.code-banner {
  position: sticky; top: 0; z-index: 20;
  background: var(--accent); color: #fff;
  padding: 10px 16px; border-radius: 0 0 14px 14px;
  font-family: 'Fraunces', serif; font-weight: 600; font-size: .98rem;
  text-align: center; margin-bottom: 14px;
  box-shadow: 0 4px 14px rgba(0,0,0,.12);
}
.code-banner b { font-size: 1.15rem; letter-spacing: .5px; }
.code-banner span { font-weight: 400; opacity: .9; font-family: 'Nunito', sans-serif; font-size: .85rem; }
.save-row { display: flex; align-items: center; gap: 12px; margin-top: 10px; }
.save-q { width: auto !important; padding: 8px 18px !important; }
.autosave-note.dirty { color: var(--danger); }
.autosave-note.saved { color: var(--ok); font-weight: 700; }