/* ── Reset & Base ──────────────────────────────── */
:root {
  color-scheme: light;
  --ink-950: #092635;
  --ink-800: #123548;
  --ink-650: #486976;
  --teal-700: #087f82;
  --teal-100: #d9eeee;
  --canvas: #edf3f3;
  --surface: #f9fcfb;
  --line: #c8d7d8;
  --amber-600: #d38a20;
  --amber-100: #fff0cf;
  --danger-600: #a54e42;
  --danger-100: #fae7e3;
  --muted: #6d828b;
  --success-700: #14766d;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --focus-ring: 0 0 0 3px rgb(8 127 130 / 22%);
}

*, *::before, *::after { box-sizing: border-box; }
html { max-width: 100%; background: var(--canvas); }
body {
  margin: 0;
  max-width: 100%;
  background: var(--canvas);
  color: var(--ink-950);
  font-family: "Microsoft YaHei UI", "Noto Sans SC", "Source Han Sans SC", sans-serif;
}
button, input, select, textarea { font: inherit; }
button, [role="button"], input, select, textarea { outline: none; }
button:focus-visible, [role="button"]:focus-visible,
input:focus-visible, select:focus-visible, textarea:focus-visible,
a:focus-visible { box-shadow: var(--focus-ring); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.surface-panel { border: 1px solid var(--line); background: var(--surface); }
.field-control { width: 100%; min-height: 2.75rem; border: 1px solid var(--line); background: #fff; color: var(--ink-950); }
.status-badge { display: inline-flex; align-items: center; gap: var(--space-2); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

.app-shell { display: grid; grid-template-columns: 248px minmax(0, 1fr); min-height: 100vh; background: var(--ink-950); }
.app-sidebar {
  position: sticky;
  top: 0;
  align-self: start;
  min-height: 100vh;
  padding: var(--space-6) var(--space-4);
  background: var(--ink-950);
  color: var(--surface);
}
.app-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0.02em;
}
.app-brand-mark {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  border: 1px solid rgb(255 255 255 / 36%);
  background: var(--teal-700);
  color: #fff;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 0.9rem;
}
.workspace-link-glyph { display: none; }
#workspace-nav { display: grid; gap: var(--space-2); }
.workspace-link {
  width: 100%;
  padding: 0.75rem 0.875rem;
  border: 1px solid transparent;
  border-radius: 0.4rem;
  background: transparent;
  color: #c8d7d8;
  cursor: pointer;
  font-size: 0.875rem;
  text-align: left;
  transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease;
}
.workspace-link:hover { border-color: rgb(255 255 255 / 16%); color: #fff; }
.workspace-link.active { border-color: rgb(217 238 238 / 32%); background: rgb(8 127 130 / 36%); color: #fff; font-weight: 650; }
.admin-nav-section { margin-top: var(--space-8); padding-top: var(--space-4); border-top: 1px solid rgb(255 255 255 / 14%); }
.admin-nav-section[hidden], .admin-console[hidden] { display: none; }
.sidebar-label { margin: 0 0 var(--space-2); padding: 0 0.875rem; color: #8eaaaf; font-size: 0.7rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; }
.app-workspace { min-width: 0; background: var(--canvas); }
.workspace-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding: 1.25rem clamp(1rem, 4vw, 3rem);
  border-bottom: 1px solid var(--line);
  background: rgb(249 252 251 / 92%);
}
.mobile-nav-toggle {
  display: none;
  min-height: 2.75rem;
  padding: 0 var(--space-3);
  border: 1px solid var(--teal-700);
  background: var(--surface);
  color: var(--teal-700);
  cursor: pointer;
  font-weight: 700;
}
.mobile-nav-close,
.mobile-nav-backdrop { display: none; }
.workspace-kicker { margin: 0 0 0.2rem; color: var(--teal-700); font-size: 0.7rem; font-weight: 750; letter-spacing: 0.11em; }
.workspace-heading h1 { margin: 0; color: var(--ink-950); font-family: "Microsoft YaHei", sans-serif; font-size: clamp(1.4rem, 2.4vw, 2rem); line-height: 1.2; }
.workspace-heading > p:last-child { margin: 0.35rem 0 0; color: var(--ink-650); font-size: 0.85rem; }
.workspace-main { width: min(100%, 1040px); margin: 0 auto; padding: var(--space-6) clamp(1rem, 4vw, 3rem) 4rem; }
.hint { color: var(--muted); font-size: 13px; margin-top: 4px; }

.tab-content { display: none; }
.tab-content.active { display: block; }

/* ── Card ──────────────────────────────────────── */
.card {
  background: #fff;
  border-radius: 10px;
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}
.card h2 { font-size: 18px; color: #1a1a2e; margin-bottom: 8px; }
.card h3 { font-size: 15px; color: #1a1a2e; margin-bottom: 8px; }
.card-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  gap: 12px;
}
.card-header-row h3 { margin-bottom: 0; }

/* ── Form Elements ─────────────────────────────── */
.form-row { display: flex; gap: 16px; align-items: flex-end; flex-wrap: wrap; }
.form-group { flex: 1; min-width: 160px; margin-bottom: 12px; }
.form-group label { display: block; font-size: 14px; font-weight: 500; margin-bottom: 4px; }
.input, .select, textarea.input {
  width: 100%;
  height: 44px;
  padding: 0 12px;
  line-height: 42px;
  border: 1px solid #d0d0d0;
  border-radius: 6px;
  font-size: 14px;
  transition: border-color 0.2s;
  font-family: inherit;
  box-sizing: border-box;
  vertical-align: middle;
}
select.select { height: 44px; }
textarea.input { height: auto; padding: 10px 12px; line-height: 1.5; resize: vertical; min-height: 60px; }
.input:focus, .select:focus, textarea.input:focus {
  outline: none;
  border-color: #4472C4;
  box-shadow: 0 0 0 3px rgba(68,114,196,0.1);
}
textarea.input { resize: vertical; min-height: 60px; }

.config-source { display: flex; gap: 24px; margin-bottom: 12px; flex-wrap: wrap; }
.radio-label { display: flex; align-items: center; gap: 6px; cursor: pointer; font-size: 14px; }
.config-section { margin-top: 8px; }

/* ── Scoring configuration studio ────────────── */
.config-studio-heading {
  max-width: 48rem;
  margin-bottom: var(--space-6);
}
.config-studio-heading h2 { margin: 0; color: var(--ink-950); }
.config-studio-heading > p:last-child { margin: var(--space-2) 0 0; color: var(--muted); }
.config-studio-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 16rem;
  gap: var(--space-4);
  align-items: start;
}
.config-source-panel,
.config-rule-panel,
.config-inspector-panel { min-width: 0; }
.config-source-panel,
.config-inspector-panel { padding: var(--space-4); }
.config-rule-panel { padding: 0; overflow: hidden; }
.config-source-panel {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) auto;
  gap: var(--space-4) var(--space-6);
  align-items: end;
}
.config-source-panel .config-panel-label { grid-column: 1 / -1; margin: 0; }
.config-source-panel .form-group { margin: 0; min-width: 0; }
.config-source-panel .select { text-overflow: ellipsis; }
.config-rule-panel .form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
  gap: var(--space-4) var(--space-6);
}
.config-rule-panel .form-group { min-width: 0; max-width: none; margin-bottom: 0; }
.config-rule-panel .card-header-row { flex-wrap: wrap; }
.config-rule-panel .input { min-width: 0; }
.config-rule-help { margin: 0 0 var(--space-4); color: var(--muted); font-size: .82rem; }
#dimensions-container, #bonus-container {
  max-height: min(24rem, 45vh);
  overflow-y: auto;
  scrollbar-gutter: stable;
  padding: 3px;
}
#cfg-extra-rules { max-height: 16rem; overflow-y: auto; }
.config-panel-label {
  margin: 0 0 var(--space-4);
  color: var(--teal-700);
  font-size: 0.7rem;
  font-weight: 750;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}
.config-source-actions,
.config-studio-actions { display: grid; gap: var(--space-2); }
.config-source-actions .btn,
.config-studio-actions .btn { width: 100%; }
.config-rule-section { padding: var(--space-5); }
.config-rule-section + .config-rule-section { border-top: 1px solid var(--line); }
.config-rule-section h3 { margin-top: 0; color: var(--ink-800); }
.config-rule-tabs {
  display: flex;
  padding: 0 var(--space-5);
  gap: var(--space-4);
  border-block: 1px solid var(--line);
  background: var(--surface);
}
.config-rule-tab {
  padding: .875rem .25rem;
  border: 0;
  border-bottom: 3px solid transparent;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: .875rem;
  cursor: pointer;
}
.config-rule-tab[aria-selected="true"] { border-bottom-color: var(--teal-700); color: var(--teal-700); font-weight: 700; }
.config-rule-tab:hover { color: var(--ink-950); }
.config-rule-tab:focus-visible { outline: 2px solid var(--teal-700); outline-offset: -2px; }
.config-rule-view[hidden] { display: none; }
.config-rule-view + .config-rule-view { border-top: 0; }
.config-guidance { margin-top: var(--space-3); border-top: 1px solid var(--line); padding-top: var(--space-3); }
.config-guidance > summary { cursor: pointer; color: var(--muted); font-size: .8rem; }
.config-guidance[open] > summary { margin-bottom: var(--space-3); }
.config-filename-field { max-width: 13rem; }
.config-number-field { max-width: 10rem; }
.config-inspector-panel {
  position: sticky;
  top: var(--space-4);
  border-top: 3px solid var(--teal-700);
}
#config-capability-note {
  margin: 0;
  color: var(--ink-800);
  font-size: 0.86rem;
  line-height: 1.65;
}
.system-policy-note {
  margin: var(--space-4) 0;
  padding: var(--space-3);
  border: 1px solid var(--line);
  background: var(--canvas);
}
.system-policy-note strong { color: var(--ink-800); font-size: 0.82rem; }
.system-policy-note p { margin: var(--space-2) 0 0; color: var(--muted); font-size: 0.75rem; line-height: 1.6; }
.config-studio-actions .save-status { min-height: 1.5em; margin-top: var(--space-2); }
.config-studio-actions .save-status:empty { display: none; }

@media (max-width: 1440px) {
  .config-studio-layout { grid-template-columns: minmax(0, 1fr); }
  .config-inspector-panel { grid-column: 1 / -1; position: static; }
  .config-studio-actions { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .config-studio-actions .save-status { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .app-shell { grid-template-columns: 4.5rem minmax(0, 1fr); }
  .app-sidebar { padding: var(--space-4) var(--space-3); }
  .app-brand { justify-content: center; }
  .app-brand-label,
  .workspace-link-label,
  .sidebar-label {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
  }
  .workspace-link { display: grid; place-items: center; padding: var(--space-3); text-align: center; }
  .workspace-link-glyph { display: grid; place-items: center; width: 1.75rem; height: 1.75rem; border: 1px solid rgb(255 255 255 / 20%); }
  .task-layout { grid-template-columns: 1fr; }
  .task-readiness { position: static; grid-row: 1; }
  .config-studio-layout { grid-template-columns: 1fr; }
  .config-source-panel,
  .config-rule-panel,
  .config-inspector-panel { grid-column: 1; }
}

/* ── Task workbench ───────────────────────────── */
.process-rail {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 var(--space-6);
  padding: 1px;
  list-style: none;
  background: var(--line);
}
.process-rail button {
  display: grid;
  gap: var(--space-2);
  width: 100%;
  min-height: 4.6rem;
  padding: var(--space-3);
  border: 0;
  background: var(--surface);
  color: var(--ink-650);
  cursor: pointer;
  text-align: left;
}
.process-rail button span {
  color: var(--muted);
  font-family: Consolas, "Microsoft YaHei UI", monospace;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
}
.process-rail button[aria-current="step"] {
  background: var(--ink-950);
  color: #fff;
}
.process-rail button[aria-current="step"] span { color: var(--teal-100); }
.task-layout { display: grid; grid-template-columns: minmax(0, 1fr) 15rem; gap: var(--space-6); align-items: start; }
.task-stage-stack { min-width: 0; }
.task-stage[hidden] { display: none; }
.task-stage-kicker { margin: 0 0 var(--space-2); color: var(--teal-700); font-size: 0.7rem; font-weight: 750; letter-spacing: 0.11em; text-transform: uppercase; }
.task-stage > h2 { margin-top: 0; color: var(--ink-950); }
.task-readiness {
  position: sticky;
  top: var(--space-6);
  padding: var(--space-4);
  border-top: 3px solid var(--teal-700);
  background: var(--surface);
  box-shadow: 0 1px 4px rgb(9 38 53 / 8%);
}
.task-readiness h2 { margin: 0 0 var(--space-4); font-size: 1rem; }
.readiness-list, .task-review-list { display: grid; gap: var(--space-3); margin: 0; padding: 0; list-style: none; }
.readiness-item { display: grid; grid-template-columns: auto 1fr; gap: 0.15rem var(--space-2); padding-bottom: var(--space-3); border-bottom: 1px solid var(--line); }
.readiness-state { grid-row: span 2; align-self: start; padding: 0.15rem 0.35rem; border: 1px solid var(--line); color: var(--muted); font-size: 0.65rem; font-weight: 700; }
.readiness-item.is-ready .readiness-state { border-color: #91c7be; background: #e2f3ef; color: var(--success-700); }
.readiness-label { color: var(--ink-800); font-size: 0.85rem; font-weight: 700; }
.readiness-detail { color: var(--muted); font-size: 0.76rem; }
.provider-mode-picker { display: flex; gap: var(--space-4); margin: var(--space-4) 0; padding: var(--space-4); border: 1px solid var(--line); }
.provider-mode-picker legend { padding: 0 var(--space-2); color: var(--ink-800); font-weight: 700; }
.provider-mode-picker label { display: flex; align-items: center; gap: var(--space-2); }
.default-provider-summary { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); margin: 0 0 var(--space-4); border: 1px solid var(--line); }
.default-provider-summary div { padding: var(--space-3); }
.default-provider-summary div + div { border-left: 1px solid var(--line); }
.default-provider-summary dt { color: var(--muted); font-size: 0.72rem; }
.default-provider-summary dd { margin: var(--space-1) 0 0; overflow-wrap: anywhere; color: var(--ink-800); font-size: 0.86rem; font-weight: 650; }
.task-review-list { margin-bottom: var(--space-6); }

.toggle-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 14px;
}

/* ── Buttons ───────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 10px 20px;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
  font-weight: 500;
}
.btn:hover { opacity: 0.9; transform: translateY(-1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.btn-primary { background: #4472C4; color: #fff; }
.btn-success { background: #27ae60; color: #fff; }
.btn-danger { background: #e74c3c; color: #fff; }
.btn-outline { background: #fff; color: #4472C4; border: 1px solid #4472C4; }
.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-lg { padding: 12px 28px; font-size: 16px; }

/* ── File List ─────────────────────────────────── */
.files-list {
  margin-top: 12px;
  display: none;
}
.files-list.show {
  display: block;
}
.file-entry {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  background: #f0f4ff;
  border-radius: 6px;
  margin-bottom: 4px;
  font-size: 13px;
}
.file-entry-icon { font-size: 16px; }
.file-entry-name { flex: 1; font-weight: 500; }
.file-entry-size { color: #888; font-size: 12px; }
.file-entry .btn { flex-shrink: 0; }

/* ── Drop Zone ─────────────────────────────────── */
.drop-zone {
  border: 2px dashed #c0c0c0;
  border-radius: 10px;
  padding: 32px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  background: #fafbfc;
}
.drop-zone:hover, .drop-zone.drag-over {
  border-color: #4472C4;
  background: #f0f4ff;
}
.dz-icon { font-size: 36px; color: #999; }
.drop-zone p { margin-top: 8px; color: #666; font-size: 14px; }
.file-name {
  margin-top: 8px;
  padding: 8px 12px;
  background: #e8f5e9;
  border-radius: 6px;
  font-size: 13px;
  color: #2e7d32;
  display: none;
}
.file-name.show { display: block; }

/* ── Progress ──────────────────────────────────── */
.task-progress,
.task-outcome {
  padding: clamp(1.25rem, 4vw, 2rem);
  border-left: 0.3rem solid var(--teal-700);
  background: linear-gradient(110deg, var(--surface), #fff);
}
.progress-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
}
.progress-heading h2 { margin: 0; color: var(--ink-950); }
.progress-count {
  color: var(--teal-700);
  font-family: Consolas, "Microsoft YaHei UI", monospace;
  font-size: clamp(1.1rem, 3vw, 1.5rem);
  font-weight: 750;
  letter-spacing: -0.04em;
}
.progress-track {
  height: 0.65rem;
  margin: var(--space-6) 0 var(--space-4);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--canvas);
}
.progress-bar {
  height: 100%;
  background: repeating-linear-gradient(135deg, var(--teal-700) 0 0.45rem, #1c9997 0.45rem 0.9rem);
  transition: width 0.3s ease;
}
.progress-message { min-height: 1.5em; color: var(--ink-800); font-weight: 650; }
.progress-stats { color: var(--muted); font-size: 0.8rem; }
.task-progress .btn-danger { margin-top: var(--space-3); }

/* ── Result ────────────────────────────────────── */
.result-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
}
.result-item {
  padding: var(--space-4);
  border-top: 2px solid var(--line);
  background: var(--canvas);
}
.result-item .value { color: var(--ink-950); font-size: 1.6rem; font-weight: 750; }
.result-item .label { margin-top: var(--space-1); color: var(--muted); font-size: 0.75rem; }
.outcome-guidance {
  margin: var(--space-6) 0 0;
  padding: var(--space-4);
  border-left: 2px solid var(--amber-600);
  background: var(--amber-100);
  color: var(--ink-800);
}
.task-outcome-actions { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-top: var(--space-6); }

/* ── Dimension Editor ──────────────────────────── */
.dim-block {
  background: #f8f9fa;
  border: 1px solid #e8e8e8;
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 12px;
}
.dim-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.dim-block-header .dim-title { font-weight: 600; font-size: 14px; }
.dim-block .form-row { margin-bottom: 8px; }

.rubric-levels { margin-top: 10px; }
.rubric-level {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 6px;
}
.rubric-level.rubric-header {
  font-size: 11px; color: #999; margin-bottom: 4px;
}
.rubric-level.rubric-header span {
  flex-shrink: 0; padding-left: 2px;
}
.rubric-level input { padding: 6px 8px; font-size: 13px; }
.rubric-level .rubric-range { width: 110px; flex-shrink: 0; }
.rubric-level .rubric-desc { flex: 1; }
.rubric-level .btn { padding: 4px 8px; font-size: 12px; }

/* Keep long teacher rubrics readable without expanding every editor at once. */
.config-rule-panel .config-rule-card { padding: 0; border-radius: 6px; background: var(--surface); }
.config-rule-summary { padding: var(--space-4); cursor: pointer; color: var(--ink-800); }
.config-rule-summary::marker { color: var(--teal-700); }
.config-rule-summary:focus-visible { outline: 2px solid var(--teal-700); outline-offset: -2px; }
.config-rule-summary .dim-title { overflow-wrap: anywhere; font-weight: 650; }
.config-rule-meta { display: block; margin: var(--space-2) 0 0 1rem; color: var(--muted); font-size: .78rem; }
.config-rule-body { padding: var(--space-4); border-top: 1px solid var(--line); }
.config-rule-body > .btn { margin-top: var(--space-3); }
.config-rule-body .dim-block-header { justify-content: flex-end; }
.config-rule-panel .rubric-level {
  display: grid;
  grid-template-columns: 7rem minmax(0, 1fr) 2.5rem;
  gap: var(--space-3);
  align-items: start;
  margin-bottom: var(--space-3);
}
.config-rule-panel .rubric-level .rubric-range { width: 100%; }
.config-rule-panel textarea.rubric-desc {
  height: 6rem;
  min-height: 5rem;
  max-height: 14rem;
  padding: var(--space-3);
  line-height: 1.6;
  resize: vertical;
  overflow-y: auto;
}
@media (max-width: 767px) {
  .config-source-panel { grid-template-columns: minmax(0, 1fr); }
  .config-rule-panel .form-row { grid-template-columns: minmax(0, 1fr); }
  .config-rule-panel .rubric-level { grid-template-columns: minmax(0, 1fr) 2.5rem; }
  .config-rule-panel .rubric-level .rubric-desc { grid-column: 1 / -1; grid-row: 2; }
  .config-rule-panel .rubric-level.rubric-header { display: none; }
}

.bonus-block {
  background: #fefaf0;
  border: 1px solid #f0e6cc;
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 12px;
}

/* ── Task List ─────────────────────────────────── */
.task-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border: 1px solid #eee;
  border-radius: 8px;
  margin-bottom: 8px;
  gap: 12px;
  flex-wrap: wrap;
}
.task-row:hover { background: #fafbfc; }
.task-info { flex: 1; min-width: 200px; }
.task-info .task-id { font-family: monospace; font-size: 12px; color: #888; }
.task-info .task-course { font-size: 14px; font-weight: 500; }
.task-info .task-time { font-size: 12px; color: #999; }
#task-list-container { display: grid; gap: var(--space-3); margin-top: var(--space-4); }
.task-record {
  display: grid;
  grid-template-columns: minmax(12rem, 1fr) auto minmax(12rem, auto) auto;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  border: 1px solid var(--line);
  background: var(--surface);
}
.task-record:hover { border-color: var(--teal-700); }
.task-record-main { display: grid; gap: var(--space-1); }
.task-record-main strong { color: var(--ink-950); font-size: 0.95rem; }
.task-record-main span, .task-record-counts { margin: 0; color: var(--muted); font-size: 0.75rem; }
.task-record-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: var(--space-2); }
.empty-state { padding: var(--space-8); border: 1px dashed var(--line); text-align: center; }
.empty-state p { color: var(--muted); }
.task-status {
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
}
.status-completed { background: #e8f5e9; color: #2e7d32; }
.status-grading, .status-parsing, .status-pending { background: #fff3e0; color: #e65100; }
.status-failed { background: #ffebee; color: #c62828; }
.status-cancelled { background: var(--canvas); color: var(--ink-650); }

/* ── Modal ─────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}
.modal {
  background: #fff;
  border-radius: 12px;
  width: 90%;
  max-width: 700px;
  max-height: 80vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid #eee;
}
.modal-header h3 { margin: 0; }
.yaml-preview {
  padding: 16px 20px;
  overflow-y: auto;
  flex: 1;
  font-family: "SF Mono", "Fira Code", "Consolas", monospace;
  font-size: 13px;
  line-height: 1.6;
  background: #1a1a2e;
  color: #e0e0e0;
  white-space: pre;
  margin: 0;
}

/* ── API Settings ─────────────────────────────── */
.api-defaults-banner {
  background: #e8f0fe;
  border: 1px solid #c5d9f5;
  border-radius: 6px;
  padding: 8px 14px;
  margin-bottom: 12px;
  font-size: 13px;
  color: #1a56b8;
  display: flex;
  align-items: center;
  gap: 8px;
}
.api-defaults-icon { font-size: 16px; }
.api-defaults-banner code {
  background: rgba(26,86,184,0.1);
  padding: 1px 6px;
  border-radius: 3px;
  font-size: 12px;
}

.api-details { margin-bottom: 12px; }
.api-details summary {
  cursor: pointer;
  font-size: 13px;
  color: #666;
  padding: 4px 0;
  user-select: none;
}
.api-details summary:hover { color: #4472C4; }

/* ── Save Status ───────────────────────────────── */
.save-status {
  margin-top: 10px;
  font-size: 13px;
}
.save-status.success { color: #27ae60; }
.save-status.error { color: #e74c3c; }

/* ── Error ─────────────────────────────────────── */
.error-banner {
  background: #ffebee;
  color: #c62828;
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
  border: 1px solid #ffcdd2;
  display: none;
}
.error-banner.show { display: block; }
.success-banner {
  margin-bottom: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border: 1px solid #a8d3cc;
  background: #e2f3ef;
  color: var(--success-700);
  font-size: 0.82rem;
}

/* ── Auth Pages ───────────────────────────────── */
/* Authentication entry: the left panel reads like a laboratory record. */
.auth-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(22rem, 0.82fr);
  min-height: 100vh;
  background: var(--canvas);
}
.auth-story {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 100%;
  padding: clamp(2rem, 7vw, 6.5rem);
  overflow: hidden;
  background: var(--ink-950);
  color: var(--surface);
}
.auth-story::after {
  position: absolute;
  right: clamp(1.5rem, 6vw, 5rem);
  bottom: clamp(2rem, 10vw, 7rem);
  width: clamp(11rem, 22vw, 18rem);
  aspect-ratio: 1;
  border: 1px solid rgb(217 238 238 / 45%);
  border-radius: 50%;
  box-shadow: 0 0 0 1.2rem rgb(8 127 130 / 22%), 0 0 0 3.2rem rgb(8 127 130 / 13%);
  content: "";
}
.auth-brand, .instrument-label {
  font-family: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}
.auth-brand { font-weight: 700; font-size: 0.9rem; }
.auth-brand span { display: block; margin-top: var(--space-2); color: var(--teal-100); font-size: 0.7rem; font-weight: 400; }
.auth-story-copy { position: relative; z-index: 1; max-width: 40rem; margin: auto 0; }
.instrument-label { margin: 0 0 var(--space-3); color: var(--teal-700); font-size: 0.72rem; font-weight: 700; }
.auth-story .instrument-label { color: var(--teal-100); }
.auth-story h1 { max-width: 13ch; margin: 0; font-size: clamp(2.2rem, 4.5vw, 4.5rem); line-height: 1.14; letter-spacing: -0.045em; }
.auth-story-copy > p:last-child { max-width: 32rem; margin: var(--space-6) 0 0; color: #c8d7d8; line-height: 1.8; }
.auth-security-note { position: relative; z-index: 1; max-width: 35rem; margin: 0; padding-top: var(--space-4); border-top: 1px solid rgb(217 238 238 / 32%); color: #c8d7d8; font-size: 0.85rem; line-height: 1.7; }
.auth-panel { align-self: center; width: min(100%, 32rem); margin: 0 auto; padding: clamp(2rem, 6vw, 4.75rem); }
.auth-panel h2 { margin: 0; color: var(--ink-950); font-size: clamp(1.7rem, 3vw, 2.3rem); letter-spacing: -0.04em; }
.auth-panel > .instrument-label { margin-top: 0; }
.auth-subtitle { margin: var(--space-2) 0 var(--space-8); color: var(--muted); line-height: 1.65; }
.auth-panel .form-group { margin-bottom: var(--space-4); }
.auth-panel .form-group label { color: var(--ink-800); font-weight: 700; }
.auth-panel .input { border-color: var(--line); border-radius: 0; background: #fff; }
.auth-panel .input:focus { border-color: var(--teal-700); box-shadow: var(--focus-ring); }
.auth-submit { width: 100%; border-radius: 0; }
.auth-panel .btn-primary { background: var(--teal-700); }
.auth-error, .auth-success { margin-bottom: var(--space-4); padding: var(--space-3) var(--space-4); border: 1px solid; font-size: 0.9rem; line-height: 1.5; }
.auth-error { border-color: #dfb9b2; background: var(--danger-100); color: var(--danger-600); }
.auth-success { border-color: #a8d3cc; background: #e2f3ef; color: var(--success-700); }
.auth-footer { margin-top: var(--space-6); color: var(--muted); font-size: 0.9rem; }
.auth-footer #login-footer { display: flex; align-items: center; gap: var(--space-3); flex-wrap: wrap; }
.auth-footer a { color: var(--teal-700); font-weight: 700; text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
.auth-footer .btn { padding: var(--space-2) var(--space-3); border-color: var(--teal-700); color: var(--teal-700); }

.auth-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 24px;
}
.auth-card {
  background: #fff;
  border-radius: 12px;
  padding: 40px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}
.auth-header {
  text-align: center;
  margin-bottom: 28px;
}
.auth-header h1 { font-size: 24px; color: #1a1a2e; margin-bottom: 6px; }
.auth-header p { color: #888; font-size: 14px; }
.auth-container .auth-error {
  background: #ffebee;
  color: #c62828;
  padding: 10px 14px;
  border-radius: 6px;
  margin-bottom: 16px;
  font-size: 13px;
  border: 1px solid #ffcdd2;
}
.auth-container .auth-footer {
  text-align: center;
  margin-top: 20px;
  font-size: 14px;
  color: #888;
}
.auth-container .auth-footer a { color: #4472C4; text-decoration: none; }
.auth-container .auth-footer a:hover { text-decoration: underline; }

/* ── User Bar ─────────────────────────────────── */
.user-bar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  background: transparent;
  padding: 0;
  margin: 0;
  flex-wrap: wrap;
  gap: 8px;
}
.user-bar-left {
  display: flex;
  align-items: center;
  gap: 10px;
}
.user-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--teal-700);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 14px;
}
.user-name { font-weight: 500; font-size: 14px; }
.user-role {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 500;
}
.role-admin { background: #ffebee; color: #c62828; }
.role-teacher { background: #e8f0fe; color: #1a56b8; }

/* ── Administrator console ───────────────────── */
.admin-console {
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: 0 1rem 2.5rem rgb(9 38 53 / 8%);
}
.admin-console-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-6);
  padding: clamp(1.25rem, 3vw, 2rem);
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(105deg, rgb(217 238 238 / 70%), transparent 58%),
    var(--surface);
}
.admin-console-header .instrument-label { margin-bottom: var(--space-2); }
.admin-console-header h2 { margin: 0; color: var(--ink-950); font-size: clamp(1.35rem, 2.5vw, 1.85rem); }
.admin-console-header > p { max-width: 24rem; margin: 0; color: var(--ink-650); font-size: 0.83rem; text-align: right; }
.admin-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.admin-summary > div { display: grid; gap: var(--space-1); padding: var(--space-4) var(--space-6); }
.admin-summary > div + div { border-left: 1px solid var(--line); }
.admin-summary strong { color: var(--teal-700); font-size: 0.78rem; letter-spacing: 0.08em; }
.admin-summary span { color: var(--ink-650); font-size: 0.78rem; }
.admin-content { min-height: 12rem; padding: var(--space-6); background: #fff; }
.admin-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  background: #ffcdd2;
  color: #c62828;
  font-size: 10px;
  margin-left: 6px;
  font-weight: 600;
}
.admin-actions {
  display: flex;
  gap: 6px;
}
.btn-xs {
  padding: 3px 8px;
  font-size: 11px;
  border-radius: 4px;
}

/* ── Anomaly Alerts ────────────────────────────── */
.anomaly-alert {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 6px;
  margin-bottom: 8px;
  font-size: 13px;
}
.anomaly-critical {
  background: #ffebee;
  border: 1px solid #ffcdd2;
}
.anomaly-warning {
  background: #fff8e1;
  border: 1px solid #ffecb3;
}
.anomaly-icon {
  font-size: 16px;
  flex-shrink: 0;
  margin-top: 1px;
}
.anomaly-body strong {
  font-weight: 600;
}
.anomaly-detail {
  color: #888;
  font-size: 12px;
  margin-top: 2px;
}

/* ── Responsive ────────────────────────────────── */
@media (max-width: 600px) {
  .header h1 { font-size: 22px; }
  .card { padding: 16px; }
  .result-summary { grid-template-columns: repeat(2, 1fr); }
  .rubric-level { flex-wrap: wrap; }
  .rubric-level .rubric-range { width: 100%; }
}

@media (max-width: 767px) {
  .config-studio-layout { grid-template-columns: 1fr; }
  .config-source-panel,
  .config-rule-panel,
  .config-inspector-panel { grid-column: 1; }
  .config-studio-actions { grid-template-columns: 1fr; }
  .config-studio-actions .save-status { grid-column: 1; }
  .config-filename-field,
  .config-number-field { max-width: none; }
  .config-rule-section { padding: var(--space-4); }
  .app-shell { display: block; background: var(--canvas); }
  .app-sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 40;
    width: min(18rem, 86vw);
    min-height: 100vh;
    padding: var(--space-6) var(--space-4);
    overflow-y: auto;
    transform: translateX(-102%);
    transition: transform 180ms ease;
  }
  .app-sidebar.is-open { transform: translateX(0); box-shadow: 1rem 0 3rem rgb(9 38 53 / 28%); }
  .mobile-nav-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 2.75rem;
    margin: 0 0 var(--space-4) auto;
    padding: 0 var(--space-3);
    border: 1px solid rgb(255 255 255 / 36%);
    background: transparent;
    color: #fff;
    cursor: pointer;
  }
  .mobile-nav-backdrop {
    position: fixed;
    inset: 0;
    z-index: 30;
    display: block;
    background: rgb(9 38 53 / 48%);
  }
  .mobile-nav-backdrop[hidden] { display: none; }
  .app-brand { justify-content: flex-start; }
  .app-brand-label,
  .workspace-link-label,
  .sidebar-label { position: static; width: auto; height: auto; margin: 0; overflow: visible; clip: auto; white-space: normal; }
  .workspace-link { display: flex; align-items: center; gap: var(--space-3); padding: 0.75rem 0.875rem; text-align: left; }
  .workspace-link-glyph { flex: 0 0 auto; }
  .app-brand { margin-bottom: var(--space-4); }
  #workspace-nav { grid-template-columns: 1fr; }
  .admin-nav-section { margin-top: var(--space-4); }
  .admin-console-header { align-items: flex-start; flex-direction: column; }
  .admin-console-header > p { text-align: left; }
  .admin-summary { grid-template-columns: 1fr; }
  .admin-summary > div + div { border-top: 1px solid var(--line); border-left: 0; }
  .admin-content { padding: var(--space-4); }
  .workspace-header { display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: start; }
  .mobile-nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .user-bar { grid-column: 1 / -1; }
  .user-bar { justify-content: flex-start; }
  .workspace-main { padding-top: var(--space-4); }
  .process-rail { grid-template-columns: none; grid-auto-flow: column; grid-auto-columns: 9rem; overflow-x: auto; scroll-snap-type: x proximity; }
  .process-rail li { scroll-snap-align: start; }
  .task-layout { display: block; }
  .task-readiness { position: static; margin-top: var(--space-4); }
  .provider-mode-picker, .default-provider-summary { display: grid; grid-template-columns: 1fr; }
  .default-provider-summary div + div { border-top: 1px solid var(--line); border-left: 0; }
  .task-record { grid-template-columns: 1fr auto; }
  .task-record-counts, .task-record-actions { grid-column: 1 / -1; }
  .task-record-actions { justify-content: flex-start; }
  .task-row { align-items: flex-start; }
  .admin-actions { width: 100%; flex-wrap: wrap; }
  .modal { width: calc(100% - 2rem); max-height: calc(100vh - 2rem); }
  .modal-header { gap: var(--space-3); }
  .auth-shell { display: flex; flex-direction: column-reverse; min-height: 100vh; }
  .auth-panel { align-self: stretch; width: 100%; padding: 2rem 1.25rem; background: var(--surface); }
  .auth-story { min-height: auto; padding: 1.5rem 1.25rem; }
  .auth-story::after { display: none; }
  .auth-story-copy { margin: 1.75rem 0; }
  .auth-story h1 { max-width: none; font-size: 1.65rem; }
  .auth-story-copy > p:last-child { display: none; }
  .auth-security-note { font-size: 0.78rem; }
}

@media (min-width: 768px) and (max-width: 900px) {
  .task-layout { grid-template-columns: 1fr; }
  .task-readiness { position: static; grid-row: 1; }
}