/* SAQ Practice — clean, clinical, exam-prep aesthetic */

:root {
  --bg: #fbfbfa;
  --bg-elev: #ffffff;
  --bg-sunken: #f4f4f2;
  --fg: #1a1a1a;
  --fg-muted: #5b5b5b;
  --fg-faint: #8a8a8a;
  --border: #e4e2dd;
  --border-strong: #c9c6bf;
  --accent: #1f6f8b;
  --accent-fg: #ffffff;
  --accent-soft: #e6f2f5;
  --danger: #b3261e;
  --danger-soft: #fce8e6;
  --warn: #a06600;
  --warn-soft: #fcf2d4;
  --ok: #1d6f42;
  --ok-soft: #e3f3e8;
  --grey-soft: #ececec;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .04), 0 1px 3px rgba(0, 0, 0, .04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, .06);
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Inter, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --maxw: 880px;
}

:root[data-theme="dark"], :root.dark {
  --bg: #14171a;
  --bg-elev: #1c2024;
  --bg-sunken: #0f1215;
  --fg: #ecedef;
  --fg-muted: #b1b6bb;
  --fg-faint: #7a8087;
  --border: #2c3137;
  --border-strong: #404750;
  --accent: #4ec3e0;
  --accent-fg: #08252e;
  --accent-soft: #18353e;
  --danger: #f08a85;
  --danger-soft: #3a1d1c;
  --warn: #e7b25c;
  --warn-soft: #3a2e16;
  --ok: #7bcc97;
  --ok-soft: #1a2e22;
  --grey-soft: #2a2d31;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14171a; --bg-elev: #1c2024; --bg-sunken: #0f1215;
    --fg: #ecedef; --fg-muted: #b1b6bb; --fg-faint: #7a8087;
    --border: #2c3137; --border-strong: #404750;
    --accent: #4ec3e0; --accent-fg: #08252e; --accent-soft: #18353e;
    --danger: #f08a85; --danger-soft: #3a1d1c;
    --warn: #e7b25c; --warn-soft: #3a2e16;
    --ok: #7bcc97; --ok-soft: #1a2e22;
    --grey-soft: #2a2d31;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
  font-size: 15px;
  line-height: 1.55;
}

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 24px 20px 60px;
}

/* ---------- Topbar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  padding: 10px 20px;
  background: color-mix(in srgb, var(--bg-elev) 94%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 0 color-mix(in srgb, var(--bg) 50%, transparent);
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 600;
  justify-self: start;
  min-width: 0;
}
.brand-logo {
  width: 32px; height: 32px;
  border-radius: 6px;
  object-fit: contain;
  background: white;
  padding: 2px;
  flex-shrink: 0;
}
.brand svg { color: var(--accent); }
.brand-sub {
  font-weight: 400; color: var(--fg-muted); font-size: 12px;
  border-left: 1px solid var(--border); padding-left: 10px; margin-left: 4px;
}
.topbar-center {
  justify-self: center;
}
.timer-bar {
  display: flex; align-items: center; gap: 10px;
  background: var(--bg-sunken);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 4px 14px 4px 16px;
  transition: opacity .2s ease, transform .2s ease;
}
.timer-bar.hidden { display: none; }
.timer-bar-label {
  font-size: 11px; text-transform: uppercase; letter-spacing: .08em;
  color: var(--fg-faint);
  white-space: nowrap;
}
.topbar-right { display: flex; align-items: center; gap: 10px; justify-self: end; }
.status-pill {
  font-size: 11px; padding: 3px 8px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent); border: 1px solid var(--accent);
  font-weight: 500;
  white-space: nowrap;
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
}
.status-pill.mock { background: var(--warn-soft); color: var(--warn); border-color: var(--warn); }
.status-pill.live { background: var(--ok-soft); color: var(--ok); border-color: var(--ok); }
.ghost-btn {
  background: transparent; border: 1px solid var(--border);
  color: var(--fg); padding: 5px 10px; border-radius: var(--radius-sm);
  cursor: pointer; font-size: 14px;
}
.ghost-btn:hover { background: var(--bg-sunken); }
.hidden { display: none !important; }

/* ---------- Views ---------- */
.view { display: none; }
.view.active { display: block; animation: fade .25s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

/* ---------- Question head ---------- */
.qhead {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 16px; margin-bottom: 20px;
}
.qid { font-size: 13px; color: var(--fg-muted); font-family: var(--font-mono); }
.qmeta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 4px; }
.chip {
  font-size: 12px; padding: 3px 10px; border-radius: 999px;
  background: var(--bg-sunken); color: var(--fg-muted);
  border: 1px solid var(--border);
}
.timer {
  font-family: var(--font-mono); font-size: 20px; font-weight: 700;
  color: var(--fg);
  min-width: 72px; text-align: center;
  letter-spacing: 0.5px;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: color .2s, background .2s;
}
.timer.warn {
  color: var(--warn);
  background: var(--warn-soft);
  animation: pulse-warn 1.5s ease-in-out infinite;
}
.timer.over {
  color: #fff;
  background: var(--warn);
  animation: pulse-over 1s ease-in-out infinite;
}
@keyframes pulse-warn {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}
@keyframes pulse-over {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.85; }
}

/* ---------- Stem ---------- */
.stem {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}
.stem-label {
  font-size: 11px; text-transform: uppercase; letter-spacing: .08em;
  color: var(--fg-faint); margin-bottom: 6px;
}
.stem p { margin: 0; font-size: 16px; line-height: 1.6; }

/* ---------- Parts ---------- */
.parts { display: flex; flex-direction: column; gap: 22px; }
.part-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow-sm);
}
.part-head {
  display: flex; align-items: baseline; gap: 12px; margin-bottom: 6px;
}
.part-head h3 { margin: 0; font-size: 16px; font-weight: 600; }
.part-marks {
  font-size: 12px; padding: 2px 8px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent); font-weight: 600;
}
.part-prompt {
  margin: 4px 0 12px;
  color: var(--fg-muted); font-size: 14.5px;
}
textarea {
  width: 100%; font: inherit; font-size: 14.5px; line-height: 1.55;
  padding: 12px; border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm); background: var(--bg-sunken); color: var(--fg);
  resize: vertical; min-height: 80px;
}
textarea:focus { outline: 2px solid var(--accent); outline-offset: -2px; }
.char-counter {
  font-size: 11px; color: var(--fg-faint); text-align: right; margin-top: 4px;
}

/* ---------- Actions / buttons ---------- */
.actions {
  display: flex; flex-wrap: wrap; gap: 12px; align-items: center;
  margin-top: 28px;
}
.primary-btn {
  background: var(--accent); color: var(--accent-fg);
  border: none; padding: 10px 18px; border-radius: var(--radius-sm);
  font-weight: 600; cursor: pointer; font-size: 14px;
}
.primary-btn:hover { filter: brightness(1.08); }
.primary-btn:disabled { opacity: .5; cursor: not-allowed; }
.secondary-btn {
  background: var(--bg-elev); color: var(--fg);
  border: 1px solid var(--border-strong); padding: 8px 14px;
  border-radius: var(--radius-sm); cursor: pointer; font-size: 14px;
}
.secondary-btn:hover { background: var(--bg-sunken); }
.muted { color: var(--fg-muted); }
.small { font-size: 12px; }

/* ---------- Marking view ---------- */
.marking-header {
  display: flex; justify-content: space-between; align-items: flex-start;
  gap: 16px; flex-wrap: wrap;
  margin-bottom: 20px;
}
.marking-header h2 { margin: 0 0 6px; font-size: 22px; }
.totalbar {
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 10px 16px; min-width: 180px;
  box-shadow: var(--shadow-sm); text-align: right;
}
.totalbar-label { font-size: 11px; text-transform: uppercase; letter-spacing: .07em; color: var(--fg-faint); }
.totalbar-value { font-size: 22px; font-weight: 700; font-family: var(--font-mono); }
.totalbar-pct { font-size: 13px; color: var(--fg-muted); }

.judge-controls {
  display: flex; flex-wrap: wrap; gap: 14px; align-items: flex-end;
  background: var(--bg-sunken); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 14px 16px;
  margin-bottom: 20px;
}
.judge-model-wrap {
  display: flex; flex-direction: column; gap: 4px;
  min-width: 220px;
}
.judge-label {
  font-size: 11px; text-transform: uppercase; letter-spacing: .07em;
  color: var(--fg-faint);
  font-weight: 600;
}
.judge-controls select {
  padding: 9px 10px;
  background: var(--bg-elev); color: var(--fg);
  border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
  font: inherit; font-size: 14px;
  height: 38px;
  box-sizing: border-box;
}
.judge-controls .primary-btn {
  height: 38px;
  padding: 0 18px;
  display: inline-flex; align-items: center;
  box-sizing: border-box;
}
.judge-controls .status-pill {
  align-self: center;
  margin-bottom: 6px;
}

.marking-parts { display: flex; flex-direction: column; gap: 20px; }
.m-part {
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px 20px;
  box-shadow: var(--shadow-sm);
}
.m-part h3 { margin: 0 0 4px; font-size: 16px; }
.m-prompt { color: var(--fg-muted); font-size: 14px; margin: 0 0 14px; }
.m-block-label {
  font-size: 11px; text-transform: uppercase; letter-spacing: .07em;
  color: var(--fg-faint); margin: 14px 0 6px;
}
.user-text-readonly {
  background: var(--bg-sunken); border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm); padding: 10px 12px; white-space: pre-wrap;
  font-size: 14px; min-height: 32px;
}
.user-text-readonly.empty { color: var(--fg-faint); font-style: italic; }

.key-points { display: flex; flex-direction: column; gap: 8px; }
.key-point {
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 10px 12px; background: var(--bg-sunken); position: relative;
  font-size: 14px;
}
.key-point.must {
  border-left: 3px solid var(--danger);
}
.key-point .meta {
  display: flex; gap: 8px; align-items: center; margin-bottom: 4px;
  font-size: 12px; color: var(--fg-muted);
}
.badge {
  font-size: 10.5px; padding: 2px 7px; border-radius: 999px; font-weight: 600;
  letter-spacing: .03em;
}
.badge.must { background: var(--danger-soft); color: var(--danger); border: 1px solid var(--danger); }
.badge.marks { background: var(--accent-soft); color: var(--accent); }

.cap-note {
  margin-top: 10px; padding: 10px 12px;
  background: var(--warn-soft); border-left: 3px solid var(--warn);
  border-radius: var(--radius-sm); color: var(--fg); font-size: 13px;
}

.assessment-row {
  display: flex; flex-wrap: wrap; gap: 16px; align-items: center;
  margin-top: 16px; padding-top: 14px; border-top: 1px dashed var(--border);
}
.assessment-row label { font-size: 13px; color: var(--fg-muted); display: flex; flex-direction: column; gap: 4px; }
.assessment-row input[type="number"] {
  width: 80px; padding: 6px 8px; font: inherit; font-size: 14px;
  background: var(--bg-elev); color: var(--fg);
  border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
}
.override-toggle { display: flex; align-items: center; gap: 6px; font-size: 13px; }

.llm-panel {
  margin-top: 14px; background: var(--accent-soft);
  border: 1px solid var(--accent); border-radius: var(--radius-sm);
  padding: 12px 14px; font-size: 14px;
}
.llm-panel.mock { background: var(--warn-soft); border-color: var(--warn); }
.llm-panel-head {
  display: flex; justify-content: space-between; align-items: center; gap: 10px;
  margin-bottom: 8px; font-weight: 600;
}
.llm-critique { color: var(--fg); margin: 6px 0; }
.llm-points { font-size: 13px; color: var(--fg-muted); }
.llm-points ul { margin: 4px 0 0; padding-left: 18px; }

/* ---------- Error tag pills ---------- */
.tag-pills { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.tag-pill {
  font-size: 11.5px; padding: 3px 9px; border-radius: 999px;
  border: 1px solid transparent; font-weight: 500;
}
.tag-pill.omission { background: var(--warn-soft); color: var(--warn); border-color: var(--warn); }
.tag-pill.wrong { background: var(--danger-soft); color: var(--danger); border-color: var(--danger); }
.tag-pill.vague, .tag-pill.other { background: var(--grey-soft); color: var(--fg-muted); border-color: var(--border-strong); }

/* ---------- Result view ---------- */
.result-hero {
  text-align: center; padding: 32px 20px; margin-bottom: 24px;
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow-sm);
}
.big-score {
  font-size: 56px; font-weight: 700; font-family: var(--font-mono);
  letter-spacing: -.02em; color: var(--accent);
}
.big-pct { font-size: 18px; color: var(--fg-muted); margin-top: 4px; }

table { width: 100%; border-collapse: collapse; margin: 12px 0 28px; font-size: 14px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
th { font-weight: 600; color: var(--fg-muted); font-size: 12px; text-transform: uppercase; letter-spacing: .05em; }
tr:last-child td { border-bottom: none; }
.result-table td:nth-child(2), .history-table td:nth-child(2) { font-family: var(--font-mono); }

/* ---------- Account / auth view ---------- */
.auth-grid {
  display: grid; gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  margin: 20px 0 28px;
}
.auth-card {
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px 20px;
  box-shadow: var(--shadow-sm);
}
.auth-card h3 { margin: 0 0 12px; font-size: 16px; }
.auth-card label {
  display: block; font-size: 12px; color: var(--fg-muted);
  margin: 8px 0 4px;
}
.auth-card input {
  width: 100%; padding: 8px 10px; font: inherit; font-size: 14px;
  background: var(--bg-sunken); color: var(--fg);
  border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
  margin-bottom: 4px;
}
.auth-card input:focus { outline: 2px solid var(--accent); outline-offset: -2px; }
.auth-card .primary-btn, .auth-card .secondary-btn { margin-top: 12px; }
.auth-help {
  margin-top: 12px; font-size: 12.5px; color: var(--fg-muted);
  line-height: 1.5;
}
.auth-help strong { color: var(--fg); }
code {
  font-family: var(--font-mono); font-size: 12.5px;
  background: var(--bg-sunken); padding: 1px 5px;
  border-radius: 4px; border: 1px solid var(--border);
}

/* ---------- Footer ---------- */
footer { text-align: center; padding: 24px; color: var(--fg-faint); font-size: 12px; }

/* ---------- Responsive ---------- */
@media (max-width: 720px) {
  .topbar {
    padding: 8px 10px;
    grid-template-columns: auto 1fr auto;
    gap: 8px;
  }
  .brand { gap: 6px; font-size: 13px; }
  .brand > span:not(.brand-sub) { display: none; }
  .brand-sub { display: none; }
  .brand-logo { width: 30px; height: 30px; }
  .timer-bar { padding: 3px 10px 3px 12px; gap: 8px; }
  .timer-bar-label { font-size: 9px; }
  .timer { font-size: 17px; min-width: 60px; }
  .topbar-right .status-pill { display: none; }
  .topbar-right .ghost-btn { padding: 4px 8px; font-size: 12px; }
  main { padding: 16px 14px 40px; }
  .qhead { flex-direction: column; }
  .marking-header { flex-direction: column; }
  .totalbar { width: 100%; text-align: left; }
  .judge-controls { flex-direction: column; align-items: stretch; }
  .judge-model-wrap { min-width: 0; width: 100%; }
  .judge-controls .primary-btn { width: 100%; justify-content: center; }
}

/* ---------- Stem media (clickable thumbnail) ---------- */
.stem-media {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.stem-media-thumb {
  position: relative;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--bg-sunken);
  cursor: zoom-in;
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
  max-width: 360px;
}
.stem-media-thumb:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.12);
  border-color: var(--accent);
}
.stem-media-thumb img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 240px;
  object-fit: contain;
}
.stem-media-thumb-cap {
  font-size: 12px;
  color: var(--fg-muted);
  padding: 6px 10px;
  border-top: 1px solid var(--border);
  background: var(--bg);
}
.stem-media-thumb-zoom {
  position: absolute;
  top: 6px; right: 6px;
  background: rgba(0,0,0,0.55);
  color: #fff;
  border-radius: 6px;
  font-size: 11px;
  padding: 3px 7px;
  pointer-events: none;
}

/* ---------- Image lightbox (full-screen overlay) ---------- */
.img-lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}
.img-lightbox[hidden] { display: none; }
.img-lightbox-backdrop {
  position: absolute; inset: 0;
  background: rgba(0,0,0,0.78);
  backdrop-filter: blur(2px);
}
.img-lightbox-panel {
  position: relative;
  z-index: 1;
  max-width: 94vw;
  max-height: 92vh;
  background: var(--bg);
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.img-lightbox-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-sunken);
}
.img-lightbox-caption {
  font-size: 13px;
  color: var(--fg-muted);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.img-lightbox-actions { display: flex; gap: 8px; }
.img-lightbox img {
  display: block;
  max-width: 94vw;
  max-height: calc(92vh - 56px);
  object-fit: contain;
  background: #0a0a0a;
}

/* ---------- Floating draggable thumbnail ---------- */
.img-float-thumb {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 999;
  width: 180px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  box-shadow: 0 8px 24px rgba(0,0,0,0.25);
  cursor: grab;
  user-select: none;
  overflow: hidden;
  transition: transform .15s ease;
}
.img-float-thumb[hidden] { display: none; }
.img-float-thumb.dragging { cursor: grabbing; transform: scale(1.02); }
.img-float-thumb:hover { box-shadow: 0 10px 30px rgba(0,0,0,0.35); }
.img-float-thumb img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 130px;
  object-fit: contain;
  background: #0a0a0a;
  pointer-events: none;
}
.img-float-thumb-close {
  position: absolute;
  top: 4px; right: 4px;
  width: 22px; height: 22px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: rgba(0,0,0,0.55);
  color: #fff;
  cursor: pointer;
  font-size: 12px;
  line-height: 18px;
  padding: 0;
}
.img-float-thumb-hint {
  font-size: 10.5px;
  color: var(--fg-muted);
  padding: 5px 8px;
  border-top: 1px solid var(--border);
  background: var(--bg-sunken);
  text-align: center;
}

/* ---------- Time-taken row (result view) ---------- */
.time-taken-row {
  margin-top: 14px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  background: var(--bg-sunken);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 14px;
}
.time-taken-label {
  font-weight: 600;
  color: var(--fg);
}
.time-taken-value { color: var(--fg); font-variant-numeric: tabular-nums; }
.overtime-pill {
  background: var(--danger-soft, #ffe0e0);
  color: var(--danger, #b3261e);
  font-weight: 700;
  font-size: 11px;
  letter-spacing: 0.05em;
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px solid var(--danger, #b3261e);
}

/* ---------- Mobile tweaks for lightbox/thumb ---------- */
@media (max-width: 720px) {
  .img-float-thumb { width: 130px; right: 10px; bottom: 10px; }
  .img-float-thumb-hint { font-size: 9.5px; }
  .stem-media-thumb { max-width: 100%; }
}

/* Submit button in "click again to confirm empty submit" state */
.primary-btn.warn {
  background: var(--warn, #d97706);
  border-color: var(--warn, #d97706);
}
.primary-btn.warn:hover { filter: brightness(1.05); }

/* ---------- Browse / picker view ---------- */
.browse-head {
  display: flex; flex-direction: column; gap: 12px;
  margin-bottom: 14px;
}
.browse-head h2 { margin: 0; }
.browse-controls {
  display: flex; flex-wrap: wrap; gap: 10px; align-items: center;
}
.browse-controls input[type="search"] {
  flex: 1 1 240px; min-width: 200px;
  padding: 8px 12px; font: inherit; font-size: 14px;
  background: var(--bg-sunken); color: var(--fg);
  border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
}
.browse-controls input[type="search"]:focus {
  outline: 2px solid var(--accent); outline-offset: -2px;
}
.browse-controls select {
  padding: 8px 10px; font: inherit; font-size: 14px;
  background: var(--bg-sunken); color: var(--fg);
  border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
}
.browse-list {
  display: grid; gap: 8px;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  margin-top: 6px;
}
.browse-item {
  text-align: left;
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 12px 14px;
  cursor: pointer; font: inherit; color: var(--fg);
  transition: border-color .12s ease, transform .12s ease, box-shadow .12s ease;
  display: flex; flex-direction: column; gap: 8px;
}
.browse-item:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}
.bi-head { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.bi-id {
  font-family: var(--font-mono); font-size: 13px; font-weight: 600;
  color: var(--accent);
}
.bi-snip {
  font-size: 13px; color: var(--fg-muted); line-height: 1.45;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== Recently practised + SRS ===== */
.recent-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 18px;
}
.recent-item {
  text-align: left;
  background: var(--surface, #fff);
  border: 1px solid var(--border, #e2e2e2);
  border-radius: 10px;
  padding: 12px 14px;
  cursor: pointer;
  font: inherit;
  color: inherit;
  transition: background 80ms ease, border-color 80ms ease, transform 80ms ease;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.recent-item:hover {
  border-color: var(--accent, #0a6cff);
  background: var(--surface-hover, #f6f9ff);
}
.recent-item:active { transform: translateY(1px); }
.ri-head {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.ri-meta { margin-top: 2px; }
.ri-status { background: #fff4d6; border-color: #e8c977; color: #6b4a00; }

.recent-pct {
  margin-left: auto;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  background: #eee;
  color: #333;
}
.recent-pct.pct-good { background: #d8f3df; color: #18613a; }
.recent-pct.pct-ok   { background: #fff4d6; color: #6b4a00; }
.recent-pct.pct-bad  { background: #fde2e1; color: #8a1f1a; }

/* Bucket / due chips */
.chip.bucket-overdue { background: #fde2e1; color: #8a1f1a; border-color: #f3b8b6; }
.chip.bucket-unseen  { background: #e5edff; color: #1b3aaa; border-color: #bcccff; }
.chip.bucket-soonest { background: #e6f1ff; color: #1a4a8a; border-color: #c2dafd; }

/* Result-view SRS row */
.srs-result-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 14px 0 6px;
  padding: 10px 14px;
  background: var(--surface-subtle, #f4f6fb);
  border: 1px solid var(--border, #e2e2e2);
  border-radius: 10px;
  flex-wrap: wrap;
}
.srs-result-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted, #666);
}
.chip.srs-good { background: #d8f3df; color: #18613a; border-color: #aedcb9; }
.chip.srs-ok   { background: #fff4d6; color: #6b4a00; border-color: #e8c977; }
.chip.srs-bad  { background: #fde2e1; color: #8a1f1a; border-color: #f3b8b6; }

@media (prefers-color-scheme: dark) {
  .recent-item { background: var(--surface, #1b1f27); border-color: var(--border, #2c313c); }
  .recent-item:hover { background: var(--surface-hover, #232936); }
  .recent-pct { background: #2c313c; color: #ddd; }
  .recent-pct.pct-good { background: #163e26; color: #b6e8c4; }
  .recent-pct.pct-ok   { background: #3e3110; color: #f1d68a; }
  .recent-pct.pct-bad  { background: #3e1817; color: #f3b9b5; }
  .chip.bucket-overdue { background: #3e1817; color: #f3b9b5; border-color: #6a2826; }
  .chip.bucket-unseen  { background: #181f3a; color: #b9c6f5; border-color: #2a3b78; }
  .chip.bucket-soonest { background: #122742; color: #b1cdf3; border-color: #1f3b66; }
  .chip.srs-good { background: #163e26; color: #b6e8c4; border-color: #2c6646; }
  .chip.srs-ok   { background: #3e3110; color: #f1d68a; border-color: #6c5421; }
  .chip.srs-bad  { background: #3e1817; color: #f3b9b5; border-color: #6a2826; }
  .ri-status { background: #3e3110; color: #f1d68a; border-color: #6c5421; }
  .srs-result-row { background: var(--surface-subtle, #1b1f27); border-color: var(--border, #2c313c); }
}

/* ====== SRS v2 polish: grade pills + recent tabs + browse due chip ====== */

.srs-grade-row {
  margin-top: 14px;
  padding: 12px 14px;
  background: var(--surface-2, #f7f7f9);
  border: 1px solid var(--border, #e6e6ea);
  border-radius: 10px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.srs-grade-row .srs-grade-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-2, #5a5a66);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.srs-grade-pills {
  display: inline-flex;
  gap: 6px;
  flex-wrap: wrap;
}
.grade-pill {
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border, #d8d8e0);
  background: var(--surface, #fff);
  color: var(--text, #1c1c22);
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease, transform 80ms ease, color 120ms ease;
  line-height: 1;
}
.grade-pill:hover { transform: translateY(-1px); }
.grade-pill:focus-visible { outline: 2px solid var(--focus, #4f7cff); outline-offset: 2px; }
.grade-pill.grade-1 { border-color: #f3b5b0; color: #8a1f17; }
.grade-pill.grade-2 { border-color: #f3c9b0; color: #8a4717; }
.grade-pill.grade-3 { border-color: #f3deb0; color: #7a5b15; }
.grade-pill.grade-4 { border-color: #bfe2c4; color: #1f6b34; }
.grade-pill.grade-5 { border-color: #aed9d3; color: #145e58; }
.grade-pill.grade-1.is-active { background: #fde7e4; border-color: #d96b62; color: #6a140e; }
.grade-pill.grade-2.is-active { background: #fdeede; border-color: #d99362; color: #6a3a0d; }
.grade-pill.grade-3.is-active { background: #fdf6de; border-color: #d9b562; color: #5e470b; }
.grade-pill.grade-4.is-active { background: #def0e2; border-color: #5fa872; color: #134f24; }
.grade-pill.grade-5.is-active { background: #d4ece8; border-color: #4fa097; color: #0c4742; }

.recent-tabs {
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  background: var(--surface-2, #f1f1f5);
  border: 1px solid var(--border, #e6e6ea);
  border-radius: 999px;
  margin: 8px 0 12px;
}
.recent-tab {
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 999px;
  border: none;
  background: transparent;
  color: var(--text-2, #5a5a66);
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease;
  line-height: 1;
}
.recent-tab:hover { color: var(--text, #1c1c22); }
.recent-tab.is-active {
  background: var(--surface, #fff);
  color: var(--text, #1c1c22);
  box-shadow: 0 1px 2px rgba(0,0,0,0.08);
}
.recent-tab:focus-visible { outline: 2px solid var(--focus, #4f7cff); outline-offset: 2px; }

/* Browse: per-item due chip + filter due count chip */
.bi-due-chip.bucket-overdue { background: #fde7e4; color: #8a1f17; border-color: #d96b62; }
.bi-due-chip.bucket-soonest { background: #eef3fb; color: #2a4a8a; border-color: #b6c8e6; }
#browseDueCount {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-2, #5a5a66);
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--surface-2, #f1f1f5);
  border: 1px solid var(--border, #e6e6ea);
  margin-left: 6px;
}
#browseDueCount[hidden] { display: none; }

/* Dark mode */
@media (prefers-color-scheme: dark) {
  .srs-grade-row { background: #1d1d22; border-color: #2c2c33; }
  .grade-pill { background: #16161b; color: #e7e7ec; border-color: #2c2c33; }
  .grade-pill.grade-1 { color: #f3b5b0; border-color: #5a2520; }
  .grade-pill.grade-2 { color: #f3c9b0; border-color: #5a3a20; }
  .grade-pill.grade-3 { color: #f3deb0; border-color: #5a4a20; }
  .grade-pill.grade-4 { color: #bfe2c4; border-color: #234d2e; }
  .grade-pill.grade-5 { color: #aed9d3; border-color: #1f4a47; }
  .grade-pill.grade-1.is-active { background: #3a1612; color: #ffd9d4; }
  .grade-pill.grade-2.is-active { background: #3a2812; color: #ffe1c6; }
  .grade-pill.grade-3.is-active { background: #3a3212; color: #fff0c0; }
  .grade-pill.grade-4.is-active { background: #133023; color: #c8eccf; }
  .grade-pill.grade-5.is-active { background: #102e2b; color: #b6e5dd; }
  .recent-tabs { background: #1d1d22; border-color: #2c2c33; }
  .recent-tab { color: #a4a4b0; }
  .recent-tab:hover { color: #e7e7ec; }
  .recent-tab.is-active { background: #2a2a31; color: #f7f7fa; box-shadow: 0 1px 2px rgba(0,0,0,0.45); }
  .bi-due-chip.bucket-overdue { background: #3a1612; color: #ffd9d4; border-color: #5a2520; }
  .bi-due-chip.bucket-soonest { background: #1a2536; color: #c7d6f2; border-color: #2e4170; }
  #browseDueCount { background: #1d1d22; color: #a4a4b0; border-color: #2c2c33; }
}

/* ====== Progress side panel ====== */

.side-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(20, 20, 28, 0);
  z-index: 90;
  pointer-events: none;
  transition: background 220ms ease;
}
.side-backdrop.is-open {
  background: rgba(20, 20, 28, 0.42);
  pointer-events: auto;
}
.side-panel {
  position: fixed;
  top: 0;
  right: 0;
  height: 100dvh;
  width: min(560px, 100vw);
  background: var(--surface, #fff);
  border-left: 1px solid var(--border, #e6e6ea);
  box-shadow: -12px 0 32px rgba(0, 0, 0, 0.12);
  z-index: 100;
  transform: translateX(100%);
  transition: transform 240ms cubic-bezier(0.22, 0.61, 0.36, 1);
  display: flex;
  flex-direction: column;
}
.side-panel.is-open { transform: translateX(0); }
.side-panel[hidden] { display: none; }
.side-backdrop[hidden] { display: none; }
.side-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border, #e6e6ea);
  background: var(--surface, #fff);
}
.side-panel-head h2 { margin: 0; font-size: 18px; font-weight: 600; letter-spacing: -0.01em; }
.side-panel-actions { display: inline-flex; gap: 6px; }
.side-panel-body {
  flex: 1;
  overflow-y: auto;
  padding: 18px 20px 32px;
}

/* Summary */
.pp-summary { margin-bottom: 22px; }
.pp-summary-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 14px;
}
.pp-stat {
  padding: 12px 12px 10px;
  background: var(--surface-2, #f7f7fa);
  border: 1px solid var(--border, #e6e6ea);
  border-radius: 10px;
  text-align: left;
}
.pp-stat-val {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text, #1c1c22);
  line-height: 1.1;
}
.pp-stat-of { font-size: 14px; font-weight: 500; color: var(--text-2, #76767f); }
.pp-stat-lbl { font-size: 11px; color: var(--text-2, #76767f); margin-top: 4px; text-transform: uppercase; letter-spacing: 0.04em; }

.pp-overall-bar {
  position: relative;
  display: flex;
  height: 10px;
  background: var(--surface-3, #ececf2);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 8px;
}
.pp-bar-seg { display: block; height: 100%; transition: width 240ms ease; }
.pp-mastered { background: #2f9c6f; }
.pp-practising { background: #6aa8e6; }
.pp-new { background: var(--surface-3, #ececf2); }
.pp-due { background: #d96b62; }

.pp-legend {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--text-2, #5a5a66);
}
.pp-legend span { display: inline-flex; align-items: center; gap: 5px; }
.pp-sw {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: var(--surface-3, #ececf2);
}
.pp-sw.pp-mastered { background: #2f9c6f; }
.pp-sw.pp-practising { background: #6aa8e6; }
.pp-sw.pp-new { background: #d8d8e0; border: 1px solid #c6c6cf; }
.pp-sw.pp-due { background: #d96b62; }

/* Categories */
.pp-cats-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 8px;
}
.pp-cats-head h3 { margin: 0; font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-2, #5a5a66); }

.pp-cat-row {
  display: block;
  width: 100%;
  font: inherit;
  text-align: left;
  background: var(--surface, #fff);
  border: 1px solid var(--border, #e6e6ea);
  border-radius: 10px;
  padding: 10px 12px 12px;
  margin-bottom: 8px;
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease, transform 80ms ease;
}
.pp-cat-row:hover {
  background: var(--surface-2, #f7f7fa);
  border-color: #d0d0d8;
}
.pp-cat-row:focus-visible {
  outline: 2px solid var(--focus, #4f7cff);
  outline-offset: 2px;
}
.pp-cat-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
.pp-cat-name { font-weight: 600; font-size: 13px; color: var(--text, #1c1c22); }
.pp-cat-counts {
  margin-left: auto;
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--text-2, #76767f);
}
.pp-cat-body {
  display: grid;
  grid-template-columns: 1fr 72px;
  gap: 14px;
  align-items: end;
}
.pp-cat-bar {
  display: flex;
  height: 8px;
  background: var(--surface-3, #ececf2);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 4px;
}
.pp-cat-meta { font-size: 11px; line-height: 1.4; }

.pp-cat-avg {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  height: 64px;
  position: relative;
}
.pp-cat-col {
  width: 28px;
  height: 56px;
  background: var(--surface-3, #ececf2);
  border-radius: 4px 4px 0 0;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  border-bottom: 1px solid #c6c6cf;
}
.pp-cat-col-fill {
  width: 100%;
  border-radius: 4px 4px 0 0;
  transition: height 240ms ease;
}
.pp-avg-good { background: #2f9c6f; }
.pp-avg-ok { background: #d99b3a; }
.pp-avg-bad { background: #d96b62; }
.pp-avg-empty { background: #c6c6cf; }
.pp-cat-col-lbl {
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  color: var(--text-2, #5a5a66);
  margin-top: 2px;
  line-height: 1;
}

@media (max-width: 480px) {
  .side-panel { width: 100vw; }
  .pp-summary-grid { grid-template-columns: repeat(2, 1fr); }
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
  .side-panel { background: #16161b; border-left-color: #2c2c33; box-shadow: -12px 0 32px rgba(0,0,0,0.45); }
  .side-panel-head { background: #16161b; border-bottom-color: #2c2c33; }
  .pp-stat { background: #1d1d22; border-color: #2c2c33; }
  .pp-stat-val { color: #f0f0f5; }
  .pp-overall-bar { background: #2c2c33; }
  .pp-cat-row { background: #16161b; border-color: #2c2c33; }
  .pp-cat-row:hover { background: #1d1d22; border-color: #3a3a44; }
  .pp-cat-bar { background: #2c2c33; }
  .pp-cat-col { background: #2c2c33; border-bottom-color: #3a3a44; }
  .pp-new { background: #2c2c33; }
  .pp-sw.pp-new { background: #3a3a44; border-color: #4a4a54; }
  .pp-avg-empty { background: #4a4a54; }
}

/* Weak spots tab */
.pp-tabs {
  display: inline-flex;
  gap: 2px;
  padding: 3px;
  background: var(--surface-2, #f1f1f5);
  border-radius: 999px;
  border: 1px solid var(--border, #e6e6ea);
}
.pp-tab {
  border: 0;
  background: transparent;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--muted, #6b6b75);
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.pp-tab:hover { color: var(--fg, #1a1a1f); }
.pp-tab.is-active {
  background: var(--surface, #fff);
  color: var(--fg, #1a1a1f);
  box-shadow: 0 1px 2px rgba(0,0,0,0.06);
  font-weight: 600;
}

.weak-section { margin-top: 22px; }
.weak-section .pp-cats-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 10px; }
.weak-section .pp-cats-head h3 { margin: 0; font-size: 14px; font-weight: 600; letter-spacing: -0.005em; }

.weak-list { display: flex; flex-direction: column; gap: 8px; }
.weak-row {
  width: 100%;
  text-align: left;
  border: 1px solid var(--border, #e6e6ea);
  background: var(--surface, #fff);
  border-radius: 10px;
  padding: 10px 12px;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s;
}
.weak-row:hover { background: var(--surface-2, #f7f7fa); border-color: #d3d3d9; }
.weak-bullet-text { font-size: 13px; line-height: 1.4; color: var(--fg, #1a1a1f); margin-bottom: 6px; }
.weak-meta { display: flex; flex-wrap: wrap; gap: 6px; }

.weak-tag-list { display: flex; flex-direction: column; gap: 6px; }
.weak-tag-row { display: grid; grid-template-columns: 180px 1fr 32px; align-items: center; gap: 10px; }
.weak-tag-lbl { font-size: 13px; font-weight: 500; color: var(--fg, #1a1a1f); }
.weak-tag-bar-wrap { height: 8px; background: var(--surface-2, #f1f1f5); border-radius: 999px; overflow: hidden; }
.weak-tag-bar { height: 100%; background: linear-gradient(90deg, #f59e0b, #ef4444); border-radius: 999px; }
.weak-tag-n { text-align: right; font-variant-numeric: tabular-nums; }

.weak-part-list, .weak-cat-list { display: flex; flex-direction: column; gap: 6px; }
.weak-part-row { display: grid; grid-template-columns: 80px 1fr 50px 36px; align-items: center; gap: 10px; }
.weak-cat-row {
  display: grid;
  grid-template-columns: 1fr 120px 50px 36px;
  align-items: center;
  gap: 10px;
  width: 100%;
  text-align: left;
  border: 1px solid transparent;
  background: transparent;
  border-radius: 8px;
  padding: 6px 8px;
  cursor: pointer;
}
.weak-cat-row:hover { background: var(--surface-2, #f7f7fa); border-color: var(--border, #e6e6ea); }
.weak-part-lbl, .weak-cat-lbl { font-size: 13px; font-weight: 500; color: var(--fg, #1a1a1f); }
.weak-part-bar-wrap { height: 8px; background: var(--surface-2, #f1f1f5); border-radius: 999px; overflow: hidden; }
.weak-part-bar { height: 100%; border-radius: 999px; transition: width 0.3s ease; }
.weak-part-bar.weak-part-good { background: #16a34a; }
.weak-part-bar.weak-part-ok { background: #f59e0b; }
.weak-part-bar.weak-part-bad { background: #ef4444; }
.weak-part-pct { font-size: 12px; font-weight: 600; color: var(--fg, #1a1a1f); font-variant-numeric: tabular-nums; }
.weak-part-n { text-align: right; font-variant-numeric: tabular-nums; }

@media (max-width: 640px) {
  .side-panel-head { flex-wrap: wrap; gap: 10px; }
  .pp-tabs { order: 3; flex-basis: 100%; }
  .weak-tag-row { grid-template-columns: 130px 1fr 28px; }
  .weak-cat-row { grid-template-columns: 1fr 100px 44px 28px; }
}

@media (prefers-color-scheme: dark) {
  .pp-tabs { background: #1f1f25; border-color: #2c2c33; }
  .pp-tab.is-active { background: #2a2a31; color: #f0f0f5; }
  .weak-row { background: #1c1c22; border-color: #2c2c33; }
  .weak-row:hover { background: #25252c; border-color: #3a3a44; }
  .weak-tag-bar-wrap, .weak-part-bar-wrap { background: #2a2a31; }
  .weak-cat-row:hover { background: #1f1f25; border-color: #2c2c33; }
}