/*
 * dashboard.css
 *
 * Visual baseline for the Gadfly instructor dashboard. Matches the
 * public index.html: Charter serif body, oxblood accent, hard
 * horizontal rules, no rounded pills, no gradients. Slightly more
 * utilitarian since this is a tool, not marketing.
 */

:root {
  --bg:        #fcfcfc;
  --paper:     #ffffff;
  --ink:       #15161a;
  --ink-mid:   #3a3b40;
  --ink-soft:  #5e5f64;
  --ink-faint: #8a8b90;
  --rule:      #d8d6d0;
  --rule-soft: #ececea;
  --accent:    #6b1d1d;
  --accent-mid: #8a2828;

  --serif: Charter, "Bitstream Charter", "Sitka Text", "Source Serif Pro",
           Cambria, Georgia, "Times New Roman", Times, serif;
  --sans: "Helvetica Neue", Helvetica, "Arial Nova", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Menlo", "Consolas", monospace;
}

* { box-sizing: border-box; }

html { font-size: 16px; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

code { font-family: var(--mono); font-size: 0.86em; background: var(--rule-soft); padding: 0.05em 0.35em; border-radius: 1px; }

em { font-style: italic; color: var(--ink-mid); }
strong { font-weight: 600; color: var(--ink); }

/* ---------- header ---------- */

.dash-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 2rem;
  border-bottom: 2px solid var(--ink);
  background: var(--paper);
}

.brand {
  display: flex; align-items: center; gap: 0.85rem;
  text-decoration: none; color: inherit;
}
.brand:hover { text-decoration: none; }
.brand-logo { width: 44px; height: 44px; object-fit: contain; }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-title { font-family: var(--serif); font-weight: 700; font-size: 1.25rem; }
.brand-subtitle {
  font-family: var(--serif); font-variant: small-caps;
  letter-spacing: 0.06em; font-size: 0.78rem; color: var(--ink-faint);
}

.user-nav {
  display: flex; align-items: center; gap: 1rem;
  font-family: var(--serif); font-size: 0.92rem;
}
.user-tag {
  font-variant: small-caps; letter-spacing: 0.04em;
  color: var(--ink-mid);
}

/* ---------- main ---------- */

.dash-main {
  max-width: 880px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

.kicker {
  font-family: var(--serif); font-variant: small-caps;
  letter-spacing: 0.06em; font-size: 0.84rem;
  color: var(--ink-soft); margin: 0 0 0.6rem;
}

h1 {
  font-family: var(--serif); font-weight: 700;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  letter-spacing: -0.015em; line-height: 1.1;
  margin: 0 0 1rem;
}

h2 {
  font-family: var(--serif); font-weight: 600;
  font-size: 1.3rem; margin: 2.5rem 0 1rem;
  border-bottom: 1px solid var(--rule); padding-bottom: 0.4rem;
}

p.lede { font-size: 1.08rem; color: var(--ink-mid); max-width: 38em; }

p { margin: 0 0 1rem; max-width: 36em; }

ul { padding-left: 1.4rem; margin: 0 0 1rem; }
li { margin-bottom: 0.4rem; }

/* ---------- login card ---------- */

.login-card {
  max-width: 440px;
  margin: 4rem auto;
  padding: 2.25rem 2rem;
  background: var(--paper);
  border: 1px solid var(--rule);
}

.login-card h1 { font-size: 1.7rem; margin-bottom: 0.5rem; }

.btn-primary {
  display: inline-block;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.95rem;
  background: var(--accent);
  color: var(--paper);
  padding: 0.7rem 1.2rem;
  text-decoration: none;
  margin-top: 1rem;
  border: 1px solid var(--accent);
  transition: background 80ms;
}
.btn-primary:hover { background: var(--accent-mid); border-color: var(--accent-mid); text-decoration: none; }

.fine-print {
  margin-top: 1.5rem;
  font-size: 0.85rem;
  color: var(--ink-faint);
  font-style: italic;
}

.notice {
  background: #fff7e6;
  border-left: 3px solid #c87f0a;
  padding: 0.6rem 0.85rem;
  margin: 1rem 0;
  font-size: 0.92rem;
  color: var(--ink-mid);
}

/* ---------- forbidden card ---------- */

.forbidden-card {
  max-width: 520px;
  margin: 4rem auto;
  padding: 2rem;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent);
}

/* ---------- status grid (home stub) ---------- */

.status-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin: 2rem 0;
  padding: 1.5rem 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.stat .stat-num {
  font-family: var(--serif); font-weight: 700;
  font-size: 2.1rem; color: var(--accent);
  font-variant-numeric: lining-nums; line-height: 1;
}
.stat .stat-label {
  font-family: var(--serif); font-variant: small-caps;
  letter-spacing: 0.06em; font-size: 0.82rem;
  color: var(--ink-faint); margin-top: 0.4rem;
}

@media (max-width: 600px) {
  .status-grid { grid-template-columns: 1fr; }
}

/* ---------- footer ---------- */

.dash-footer {
  max-width: 880px;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
  border-top: 1px solid var(--rule);
  font-family: var(--serif);
  font-size: 0.8rem;
  color: var(--ink-faint);
  line-height: 1.55;
}
.dash-footer p { margin: 0.3rem 0; max-width: none; }

/* ---------- primary nav ---------- */

.primary-nav {
  display: flex;
  gap: 1.6rem;
  font-family: var(--serif);
  font-size: 0.95rem;
  margin-left: auto;
  margin-right: 2rem;
}
.primary-nav a {
  color: var(--ink-mid);
  text-decoration: none;
  padding: 0.3rem 0;
  border-bottom: 1.5px solid transparent;
  transition: color 80ms, border-color 80ms;
}
.primary-nav a:hover { color: var(--ink); border-bottom-color: var(--rule); }
.primary-nav a.is-active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }

@media (max-width: 700px) {
  .primary-nav { margin: 0; gap: 1rem; }
  .dash-header { flex-wrap: wrap; }
}

/* ---------- page head ---------- */

.page-head { margin-bottom: 2rem; }

/* widen main on data-heavy pages */
.dash-main { max-width: 1080px; }

/* ---------- stat row ---------- */

.stat-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin: 2rem 0;
  padding: 1.5rem 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

@media (max-width: 700px) {
  .stat-row { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- sections ---------- */

.section { margin: 2.5rem 0; }
.section h2 { margin-bottom: 1rem; }
.section h3.muted {
  font-family: var(--serif); font-variant: small-caps;
  letter-spacing: 0.06em; font-weight: 600;
  font-size: 0.85rem; color: var(--ink-faint);
  margin: 1.4rem 0 0.5rem; border: 0; padding: 0;
}

.section.two-col {
  display: grid; grid-template-columns: 1fr 1.4fr; gap: 2.5rem;
}
@media (max-width: 800px) {
  .section.two-col { grid-template-columns: 1fr; }
}

.row-foot { margin-top: 0.6rem; font-size: 0.9rem; }
.row-foot.dim { color: var(--ink-faint); }

/* ---------- data tables ---------- */

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--serif);
  font-size: 0.95rem;
}
.data-table th, .data-table td {
  text-align: left;
  padding: 0.65rem 0.6rem;
  border-bottom: 1px solid var(--rule-soft);
  vertical-align: top;
}
.data-table th {
  font-variant: small-caps; letter-spacing: 0.06em;
  font-weight: 600; font-size: 0.85rem;
  color: var(--ink-faint);
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.5rem;
}
.data-table th.num, .data-table td.num { text-align: right; font-variant-numeric: tabular-nums lining-nums; }
.data-table tbody tr:hover { background: var(--rule-soft); }
.data-table td.empty { color: var(--ink-faint); text-align: center; padding: 1.2rem; font-style: italic; }
.data-table.small { font-size: 0.88rem; }
.data-table .dim { color: var(--ink-faint); }
.data-table a { color: var(--accent); text-decoration: none; font-weight: 600; }
.data-table a:hover { text-decoration: underline; }

/* ---------- key-value grid ---------- */

.kv-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem;
}
@media (max-width: 700px) { .kv-grid { grid-template-columns: 1fr 1fr; } }
.kv {
  padding: 0.85rem 1rem;
  background: var(--paper);
  border: 1px solid var(--rule);
}
.kv-label {
  font-family: var(--serif); font-variant: small-caps;
  letter-spacing: 0.06em; font-size: 0.78rem;
  color: var(--ink-faint); margin-bottom: 0.3rem;
}
.kv-value {
  font-family: var(--serif); font-weight: 600;
  font-size: 1.15rem; color: var(--ink);
  font-variant-numeric: lining-nums tabular-nums;
}

/* ---------- badges ---------- */

.badge {
  display: inline-block;
  font-family: var(--serif); font-variant: small-caps;
  letter-spacing: 0.06em; font-size: 0.76rem;
  padding: 0.1em 0.55em;
  border: 1px solid var(--rule-strong, var(--rule));
  border-radius: 2px;
  background: var(--paper);
  color: var(--ink-mid);
}
.badge.b-ok      { border-color: #3a7a3a; color: #3a7a3a; background: #f1f7f1; }
.badge.b-info    { border-color: #2c5d8a; color: #2c5d8a; background: #f0f5fa; }
.badge.b-warn    { border-color: #c08030; color: #8a5418; background: #fcf3e8; }
.badge.b-bad     { border-color: var(--accent); color: var(--accent); background: #f9eaea; }
.badge.b-neutral { color: var(--ink-faint); }

/* ---------- positions block ---------- */

.positions { margin: 1rem 0; }
.positions dt {
  font-family: var(--serif); font-variant: small-caps;
  letter-spacing: 0.06em; font-weight: 600;
  font-size: 0.84rem; color: var(--ink-faint);
  margin-top: 0.85rem;
}
.positions dd { margin: 0.25rem 0 0 0; color: var(--ink); }

/* ---------- transcript ---------- */

.transcript { margin: 1rem 0; }
.msg {
  padding: 1rem 1.1rem;
  margin-bottom: 0.9rem;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--rule);
}
.msg.msg-user { border-left-color: var(--accent); }
.msg.msg-assistant { border-left-color: var(--ink-mid); }
.msg-head {
  display: flex; gap: 0.85rem; align-items: baseline;
  font-family: var(--serif); font-size: 0.82rem;
  margin-bottom: 0.55rem;
}
.msg-role {
  font-variant: small-caps; letter-spacing: 0.08em;
  font-weight: 700; color: var(--accent);
}
.msg-assistant .msg-role { color: var(--ink); }
.msg-turn {
  font-variant: small-caps; letter-spacing: 0.06em;
  color: var(--ink-faint);
}
.message-text {
  font-family: var(--serif); line-height: 1.62;
  white-space: pre-wrap;
  color: var(--ink);
}
.claim-chips {
  list-style: none; padding: 0; margin: 0.7rem 0 0;
  display: flex; flex-wrap: wrap; gap: 0.4rem;
}
.claim-chip {
  display: inline-flex; gap: 0.5rem; align-items: baseline;
  padding: 0.25rem 0.6rem;
  background: var(--rule-soft);
  border: 1px solid var(--rule);
  font-size: 0.86rem;
  max-width: 100%;
}
.claim-chip .claim-scheme {
  font-family: var(--mono); font-size: 0.78rem;
  color: var(--accent); white-space: nowrap;
}
.claim-chip .claim-text { color: var(--ink-mid); }
.claim-chip .claim-thesis {
  font-family: var(--serif); font-variant: small-caps;
  letter-spacing: 0.06em; font-size: 0.7rem;
  color: var(--accent); font-weight: 700;
}

/* ---------- scheme counts ---------- */

.scheme-counts { list-style: none; padding: 0; margin: 0.5rem 0; }
.scheme-counts li {
  display: flex; justify-content: space-between;
  padding: 0.35rem 0;
  border-bottom: 1px dashed var(--rule-soft);
  font-family: var(--serif); font-size: 0.92rem;
}
.scheme-counts .scheme-name { color: var(--ink); }
.scheme-counts .scheme-num {
  color: var(--accent); font-weight: 600;
  font-variant-numeric: tabular-nums lining-nums;
}

/* ---------- claim id rendering ---------- */

.claim-id {
  font-family: var(--mono); font-size: 0.84em;
  color: var(--ink-faint);
}
.claim-text-cell { max-width: 30em; }

/* ---------- graph canvas ---------- */

.graph-canvas {
  width: 100%;
  height: 480px;
  border: 1px solid var(--rule);
  background: var(--paper);
  margin: 1rem 0;
}

/* ---------- play landing ---------- */

.week-group { margin: 2.5rem 0; }
.week-head {
  font-family: var(--serif); font-weight: 600;
  font-size: 1.25rem;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 0.4rem;
  margin-bottom: 1.25rem;
}

.topic-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}
@media (min-width: 760px) {
  .topic-list { grid-template-columns: 1fr 1fr; }
}

.topic-card {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent);
  padding: 1.2rem 1.3rem;
}
.topic-card h3 {
  font-family: var(--serif); font-weight: 700;
  font-size: 1.1rem;
  margin: 0 0 0.65rem;
  letter-spacing: -0.005em;
}
.topic-positions p {
  margin: 0 0 0.45rem;
  font-size: 0.94rem;
  color: var(--ink-mid);
  line-height: 1.55;
}
.pos-label {
  font-family: var(--serif); font-variant: small-caps;
  letter-spacing: 0.05em; font-weight: 700;
  color: var(--accent); font-size: 0.85rem;
  margin-right: 0.3em;
}
.topic-begin { margin-top: 1rem; }

/* ---------- debate topic header ---------- */

.debate-topic {
  margin: 2.5rem auto 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 2px solid var(--ink);
  text-align: center;
  max-width: 740px;
}
.debate-topic .kicker { text-align: center; }
.debate-topic h1 {
  font-family: var(--serif); font-weight: 700;
  font-size: clamp(1.6rem, 4vw, 2.3rem);
  letter-spacing: -0.018em;
  margin: 0.4rem auto 0.8rem;
  max-width: 22em;
}
.room-positions {
  margin: 1.2rem auto 0;
  padding-left: 1rem;
  border-left: 2px solid var(--rule-soft);
  text-align: left;       /* keep the position list readable */
  max-width: 38em;
}
.small-text { font-size: 0.88rem; }

/* ---------- paste warning ---------- */

.paste-warning {
  font-family: var(--serif);
  font-size: 0.9rem;
  font-style: italic;
  color: var(--accent);
  background: #f9eaea;
  border-left: 3px solid var(--accent);
  padding: 0.55rem 0.85rem;
  margin: 0 0 1rem;
  opacity: 0;
  transition: opacity 200ms ease;
  pointer-events: none;
}
.paste-warning.is-visible {
  opacity: 1;
}

/* ---------- debate room ---------- */

.debate-room {
  max-width: 740px;
  margin: 0 auto;
}
.conversation { margin: 1rem 0; }

.turn {
  margin: 2.2rem 0;
  padding-left: 1.3rem;
  border-left: 2px solid var(--ink);
}
.turn-student { border-left-color: var(--accent); }
.turn-ai      { border-left-color: var(--ink); }

.turn-head {
  display: flex; align-items: baseline;
  gap: 0.9rem;
  margin-bottom: 0.55rem;
}
.turn-speaker {
  font-family: var(--serif); font-variant: small-caps;
  letter-spacing: 0.08em;
  font-weight: 700;
  font-size: 0.86rem;
  color: var(--ink);
}
.turn-student .turn-speaker { color: var(--accent); }
.turn-meta {
  font-family: var(--serif); font-variant: small-caps;
  letter-spacing: 0.06em;
  font-size: 0.74rem;
  color: var(--ink-faint);
}
.turn-prose {
  font-family: var(--serif);
  font-size: 1.04rem;
  line-height: 1.68;
  color: var(--ink);
  max-width: 38em;
}
.turn-prose p { margin: 0 0 0.85rem; }
.turn-prose p:last-child { margin-bottom: 0; }

/* ---------- composer ---------- */

.composer {
  margin: 2.5rem 0 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
}
.composer label {
  display: block;
  font-family: var(--serif); font-variant: small-caps;
  letter-spacing: 0.08em; font-weight: 700;
  font-size: 0.86rem;
  color: var(--ink);
  margin-bottom: 0.55rem;
}
.composer textarea {
  width: 100%;
  font-family: var(--serif);
  font-size: 1.04rem;
  line-height: 1.65;
  padding: 0.55rem 0;
  border: none;
  border-bottom: 1.5px solid var(--rule-strong, var(--ink));
  background: transparent;
  color: var(--ink);
  resize: vertical;
  min-height: 110px;
  outline: none;
  box-sizing: border-box;
  display: block;
}
.composer textarea::placeholder {
  color: var(--ink-faint);
  font-style: italic;
}
.composer textarea:focus {
  border-bottom: 2px solid var(--accent);
}
.composer-actions {
  display: flex; gap: 1rem; align-items: center;
  margin-top: 1rem;
}
.btn-secondary {
  font-family: var(--serif);
  font-size: 0.95rem;
  background: transparent;
  border: 1px solid var(--rule-strong, var(--rule));
  color: var(--ink-mid);
  padding: 0.6rem 1.1rem;
  cursor: pointer;
  text-decoration: none;
}
.btn-secondary:hover {
  border-color: var(--ink);
  color: var(--ink);
}
.composer-help { margin-top: 1rem; }

/* ---------- composing placeholder ---------- */

.composing {
  margin: 2.2rem 0;
  padding: 1.4rem 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  font-family: var(--serif);
  font-style: italic;
  color: var(--ink-faint);
  text-align: center;
}
.composing-error {
  color: var(--accent);
  margin: 0;
}

/* ---------- session expired ---------- */

.session-expired {
  margin: 2rem 0;
  padding: 1.2rem 1.4rem;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent);
}
.session-expired p { margin: 0; color: var(--ink-mid); }

/* ---------- review claim list ---------- */

.claim-list { list-style: none; padding: 0; margin: 1.2rem 0; }
.claim-list li {
  padding: 0.7rem 0;
  border-bottom: 1px dashed var(--rule-soft);
  display: grid;
  grid-template-columns: 11rem 1fr;
  gap: 1rem;
  align-items: baseline;
}
.claim-list .claim-scheme {
  font-family: var(--mono); font-size: 0.82rem;
  color: var(--accent);
  letter-spacing: 0.02em;
}
.claim-list .claim-text {
  font-family: var(--serif); color: var(--ink);
  line-height: 1.55;
}

.muted-h2 { font-family: var(--serif); font-weight: 600; font-size: 1.2rem; }

/* ---------- charts ---------- */

.chart-svg { width: 100%; max-width: 720px; height: auto; margin: 1rem 0; display: block; }
.sparkline { vertical-align: middle; }

/* ---------- linguistic profile ---------- */

.linguistic-grid {
  grid-template-columns: repeat(4, 1fr);
}
@media (max-width: 800px) { .linguistic-grid { grid-template-columns: repeat(2, 1fr); } }

.tag-student, .tag-ai {
  font-family: var(--serif); font-variant: small-caps;
  letter-spacing: 0.06em; font-size: 0.78rem;
  padding: 0.05em 0.45em;
  border: 1px solid var(--rule);
  background: var(--paper);
}
.tag-student { color: var(--accent); border-color: var(--accent); }
.tag-ai { color: var(--ink-mid); }

.role-assistant { background: var(--rule-soft); }
.role-assistant td { color: var(--ink-soft); }

/* ---------- empty / dim ---------- */

.dim { color: var(--ink-faint); }
.empty { color: var(--ink-faint); font-style: italic; }

/* ---------- /play/enter (public UID landing) ---------- */

.enter-card {
  max-width: 36rem;
  margin: 3rem auto;
  padding: 2.5rem 2rem;
  background: var(--paper);
  border: 1px solid var(--rule);
}
.enter-card h1 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.6rem;
  margin: 0 0 0.75rem;
}
.enter-card .lede {
  font-family: var(--serif);
  color: var(--ink-mid);
  line-height: 1.5;
  margin: 0 0 1.25rem;
}
.enter-form {
  display: grid;
  gap: 0.4rem;
  margin: 1.25rem 0 1rem;
}
.enter-form label {
  font-family: var(--serif);
  font-variant: small-caps;
  letter-spacing: 0.06em;
  font-size: 0.78rem;
  color: var(--ink-mid);
  margin-top: 0.65rem;
}
.enter-form input[type="text"] {
  font-family: var(--serif);
  font-size: 1rem;
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--rule);
  background: var(--paper);
}
.enter-form input[type="text"]:focus {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}
.enter-form button {
  margin-top: 1rem;
  justify-self: start;
}
.enter-card .fine-print { margin-top: 1.25rem; }

.notice {
  font-family: var(--serif);
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--rule);
  margin: 0 0 1rem;
}
.notice-error {
  border-color: var(--accent);
  color: var(--accent);
  background: #fdf6f6;
}

/* ---------- room: positions block + recommended turns ---------- */

.room-positions { margin: 0.75rem 0 1.5rem; }
.room-positions p { margin: 0 0 0.4rem; }
.pos-label {
  font-family: var(--serif);
  font-variant: small-caps;
  letter-spacing: 0.06em;
  font-size: 0.78rem;
  color: var(--ink-mid);
  margin-right: 0.35rem;
}
.recommended-turns {
  margin-top: 0.75rem;
  padding: 0.55rem 0.75rem;
  border-left: 2px solid var(--accent);
  background: #fbf8f8;
}

/* ---------- opening-statement page ---------- */

.pre-instructions {
  margin: 0 0 1.5rem;
  padding: 1rem 1.25rem;
  background: #fbf8f8;
  border-left: 2px solid var(--accent);
}
.pre-instructions h2 { margin-top: 0; }
.pre-instructions p { margin: 0 0 0.6rem; }
.role-callout {
  font-family: var(--serif);
  color: var(--ink-mid);
  margin-top: 0.8rem !important;
}
.role-list {
  margin: 0.35rem 0 0.6rem;
  padding-left: 1.25rem;
  font-family: var(--serif);
  color: var(--ink-mid);
  line-height: 1.5;
}
.role-list li { margin-bottom: 0.35rem; }
.role-list li strong { color: var(--ink); }

.submitting-overlay {
  margin: 1.5rem 0;
  padding: 1.25rem 1.25rem;
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent);
  background: var(--paper);
  font-family: var(--serif);
  color: var(--ink-mid);
  font-style: italic;
  text-align: center;
}
.submitting-overlay p { margin: 0; }

/* ---------- closing-statement page ---------- */

.first-turn {
  margin: 1rem 0 1.25rem;
  border: 1px solid var(--rule);
  background: var(--paper);
}
.first-turn summary {
  cursor: pointer;
  padding: 0.55rem 0.75rem;
  font-family: var(--serif);
  font-variant: small-caps;
  letter-spacing: 0.06em;
  font-size: 0.82rem;
  color: var(--ink-mid);
}
.first-turn summary:hover { color: var(--accent); }
.first-turn-body {
  padding: 0.5rem 0.85rem 0.85rem;
  font-family: var(--serif);
  color: var(--ink-mid);
  white-space: pre-wrap;
  line-height: 1.5;
  border-top: 1px solid var(--rule-soft);
}

/* ---------- review: pre / post position evolution ---------- */

.pre-post { margin-top: 2rem; }
.pre-post-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 0.75rem;
}
@media (max-width: 800px) {
  .pre-post-grid { grid-template-columns: 1fr; }
}
.pre-post-block {
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent);
  background: var(--paper);
  padding: 0.75rem 0.9rem;
}
.pre-post-block header { margin-bottom: 0.4rem; }
.pre-post-label {
  font-family: var(--serif);
  font-variant: small-caps;
  letter-spacing: 0.06em;
  font-size: 0.78rem;
  color: var(--ink-mid);
}
.pre-post-body {
  font-family: var(--serif);
  white-space: pre-wrap;
  line-height: 1.55;
  color: var(--ink-mid);
}

/* ---------- claim list (review) ---------- */

.claim-list {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 0;
  display: grid;
  gap: 0.4rem;
}
.claim-list li {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: 0.75rem;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--rule-soft);
}
.claim-scheme {
  font-family: var(--mono, monospace);
  font-size: 0.82rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.claim-text {
  font-family: var(--serif);
  color: var(--ink-mid);
  line-height: 1.5;
}

/* ---------- course management ---------- */

.role-badge {
  display: inline-block;
  font-family: var(--serif);
  font-variant: small-caps;
  letter-spacing: 0.06em;
  font-size: 0.78rem;
  padding: 0.05em 0.5em;
  border: 1px solid var(--rule);
}
.role-owner       { border-color: var(--accent); color: var(--accent); background: #fdf6f6; }
.role-instructor  { border-color: var(--accent); color: var(--accent); }
.role-ta          { border-color: var(--ink-mid); color: var(--ink-mid); }
.role-read_only   { border-color: var(--ink-faint); color: var(--ink-faint); }

.course-form {
  display: grid;
  gap: 0.4rem;
  max-width: 36rem;
}
.course-form label {
  font-family: var(--serif);
  font-variant: small-caps;
  letter-spacing: 0.06em;
  font-size: 0.78rem;
  color: var(--ink-mid);
  margin-top: 0.75rem;
}
.course-form input[type="text"],
.course-form input[type="number"],
.course-form textarea,
.course-form select {
  font-family: var(--serif);
  font-size: 1rem;
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--rule);
  background: var(--paper);
}
.course-form input[disabled] {
  background: var(--rule-soft);
  color: var(--ink-faint);
}
.course-form input:focus,
.course-form textarea:focus,
.course-form select:focus {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}
.course-form .field-hint { margin: -0.15rem 0 0; }
.course-form label.checkbox {
  font-variant: normal;
  text-transform: none;
  letter-spacing: 0;
  font-size: 1rem;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.course-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}

.course-hub .hub-list {
  list-style: none;
  padding: 0;
  margin: 0.6rem 0 0;
  display: grid;
  gap: 0.6rem;
}
.course-hub .hub-list li {
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--rule);
  background: var(--paper);
}
.course-hub .hub-list li a { display: inline-block; margin-right: 0.6rem; }
.course-hub .hub-list li span { display: inline; }

.add-instructor-form {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 0.5rem;
  align-items: end;
  max-width: 36rem;
}
.add-instructor-form label {
  font-family: var(--serif);
  font-variant: small-caps;
  letter-spacing: 0.06em;
  font-size: 0.78rem;
  color: var(--ink-mid);
}
.add-instructor-form input,
.add-instructor-form select {
  font-family: var(--serif);
  font-size: 1rem;
  padding: 0.4rem 0.55rem;
  border: 1px solid var(--rule);
  background: var(--paper);
}
.add-instructor-form button { grid-column: 3; }

.inline-form { display: inline; margin: 0; padding: 0; }

.checkbox-grid {
  display: grid;
  gap: 0.25rem;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--rule);
  background: var(--paper);
  max-height: 14rem;
  overflow-y: auto;
}
.checkbox-grid label {
  font-family: var(--serif);
  font-size: 0.95rem;
  color: var(--ink);
  display: grid;
  grid-template-columns: 1.5rem 1fr;
  gap: 0.4rem;
  margin: 0;
  text-transform: none;
  letter-spacing: 0;
  font-variant: normal;
}
.checkbox-grid input[type="checkbox"] { margin-top: 0.2rem; }
.checkbox-grid .src-title { font-weight: 500; }
.checkbox-grid .dim { display: block; margin-top: 0.1rem; }

.row-archived td { color: var(--ink-faint); }

.upload-form {
  display: grid;
  gap: 0.4rem;
  max-width: 36rem;
}
.upload-form label {
  font-family: var(--serif);
  font-variant: small-caps;
  letter-spacing: 0.06em;
  font-size: 0.78rem;
  color: var(--ink-mid);
  margin-top: 0.75rem;
}
.upload-form input[type="text"],
.upload-form input[type="number"],
.upload-form input[type="file"],
.upload-form select {
  font-family: var(--serif);
  font-size: 1rem;
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--rule);
  background: var(--paper);
}
.upload-form input[type="file"] { padding: 0.45rem 0.3rem; }

.b-pending  { color: var(--ink-mid); border-color: var(--ink-mid); background: var(--rule-soft); }
.b-warn     { color: var(--accent); border-color: var(--accent); background: #fdf6f6; }
.b-err      { color: #8b1a1a; border-color: #8b1a1a; background: #fbeaea; }

.error-detail {
  margin-top: 0.3rem;
  font-size: 0.85rem;
}
.error-detail summary {
  cursor: pointer;
  color: var(--accent);
}
.error-detail pre {
  white-space: pre-wrap;
  background: var(--rule-soft);
  padding: 0.4rem 0.6rem;
  margin-top: 0.3rem;
  font-size: 0.85rem;
  border-left: 2px solid var(--accent);
}

/* ---------- argumentation graph legend + node detail ---------- */

.graph-legend {
  list-style: none;
  padding: 0;
  margin: 0.5rem 0 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.25rem;
  font-family: var(--serif);
  font-size: 0.88rem;
  color: var(--ink-mid);
}
.graph-legend li {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.lg-dot {
  display: inline-block;
  width: 1.5rem;
  height: 0;
  border-top-width: 3px;
  border-top-style: solid;
}
.lg-supports    { border-top-color: #2f8a3e; }
.lg-challenges  { border-top-color: #c98b1d; border-top-style: dashed; }
.lg-undercuts   { border-top-color: #d96e1f; }
.lg-rebuts      { border-top-color: #b32424; border-top-width: 4px; }
.lg-elaborates  { border-top-color: #2c5aa0; }

.node-detail {
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--rule);
  background: var(--paper);
  min-height: 4rem;
}
.node-detail .nd-head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.4rem;
  font-family: var(--serif);
  font-variant: small-caps;
  letter-spacing: 0.06em;
  font-size: 0.8rem;
}
.node-detail .nd-speaker {
  padding: 0.05em 0.4em;
  border: 1px solid var(--rule);
}
.node-detail .nd-speaker.is-student { color: var(--accent); border-color: var(--accent); }
.node-detail .nd-speaker.is-ai      { color: var(--ink-mid); }
.node-detail .nd-turn  { color: var(--ink-mid); }
.node-detail .nd-thesis {
  padding: 0.05em 0.4em;
  border: 1px solid var(--accent);
  background: #fdf6f6;
  color: var(--accent);
}
.node-detail .nd-scheme {
  font-family: var(--serif);
  color: var(--ink-mid);
  font-size: 0.9rem;
  margin-bottom: 0.45rem;
}
.node-detail .nd-text {
  font-family: var(--serif);
  line-height: 1.55;
  color: var(--ink);
  white-space: pre-wrap;
}

.notice-ok {
  border-color: #1f6f3e;
  color: #1f6f3e;
  background: #f3faf5;
}

/* ---------- sign-out as button (UID student) ---------- */

.signout-form {
  display: inline;
  margin: 0;
  padding: 0;
}
.link-button {
  background: none;
  border: 0;
  padding: 0;
  margin: 0;
  font: inherit;
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  cursor: pointer;
}
.link-button:hover { color: var(--accent-mid); }