/* Horizon LMS — design tokens & base styles */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;600&family=IBM+Plex+Sans:wght@400;500;600&display=swap');

/* ── Light theme (default) ── */
:root {
  --bg:        #f8f9fa;
  --surface:   #ffffff;
  --surface-2: #f1f3f5;
  --border:    #dee2e6;
  --accent:    #0d6efd;
  --teal:      #20c997;
  --green:     #198754;
  --orange:    #fd7e14;
  --red:       #dc3545;
  --yellow:    #ffc107;
  --text:      #212529;
  --muted:     #6c757d;
  --font-mono: 'IBM Plex Mono', 'Fira Mono', monospace;
  --font-sans: 'IBM Plex Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --radius:    6px;
  --radius-lg: 8px;
  --shadow:    0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);

  /* Semantic chip / badge colours */
  --chip-complete-bg:   #d1e7dd;
  --chip-complete-fg:   #0a3622;
  --chip-revision-bg:   #fff3cd;
  --chip-revision-fg:   #664d03;
  --chip-submitted-bg:  #cfe2ff;
  --chip-submitted-fg:  #084298;
  --chip-in-review-bg:  #e2d9f3;
  --chip-in-review-fg:  #432874;
  --chip-incomplete-bg: #e2e3e5;
  --chip-incomplete-fg: #41464b;
  --chip-pending-bg:    #e2e3e5;
  --chip-pending-fg:    #41464b;

  /* Kind badge colours */
  --kind-project-bg: #cfe2ff;
  --kind-project-fg: #084298;
  --kind-exam-bg:    #f8d7da;
  --kind-exam-fg:    #842029;
  --kind-quiz-bg:    #d1e7dd;
  --kind-quiz-fg:    #0a3622;

  /* Gate chip colours */
  --gate-locked-bg: rgba(220,53,69,.12);
  --gate-locked-fg: #dc3545;
  --gate-open-bg:   rgba(25,135,84,.12);
  --gate-open-fg:   #198754;

  /* Button primary text */
  --btn-primary-fg: #fff;
}

/* ── Dark theme ── */
[data-theme="dark"] {
  --bg:        #0d1117;
  --surface:   #161b22;
  --surface-2: #1c2128;
  --border:    #30363d;
  --accent:    #58a6ff;
  --teal:      #39d353;
  --green:     #3fb950;
  --orange:    #d29922;
  --red:       #f85149;
  --yellow:    #e3b341;
  --text:      #e6edf3;
  --muted:     #8b949e;
  --shadow:    none;

  --chip-complete-bg:   #1a3a1a;
  --chip-complete-fg:   #3fb950;
  --chip-revision-bg:   #3a2a0a;
  --chip-revision-fg:   #d29922;
  --chip-submitted-bg:  #0d2a4a;
  --chip-submitted-fg:  #58a6ff;
  --chip-in-review-bg:  #2a1c3a;
  --chip-in-review-fg:  #e3b341;
  --chip-incomplete-bg: #1c2128;
  --chip-incomplete-fg: #8b949e;
  --chip-pending-bg:    #1c2128;
  --chip-pending-fg:    #8b949e;

  --kind-project-bg: #1c2d4a;
  --kind-project-fg: #58a6ff;
  --kind-exam-bg:    #2d1c1c;
  --kind-exam-fg:    #f85149;
  --kind-quiz-bg:    #1c2a1c;
  --kind-quiz-fg:    #3fb950;

  --gate-locked-bg: rgba(248,81,73,.12);
  --gate-locked-fg: #f85149;
  --gate-open-bg:   rgba(63,185,80,.12);
  --gate-open-fg:   #3fb950;

  --btn-primary-fg: #0d1117;
}

/* ── Skip nav (accessibility) ── */
.skip-nav {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
  z-index: 9999;
}
.skip-nav:focus-visible {
  left: 1rem;
  top: 1rem;
  width: auto;
  height: auto;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: var(--btn-primary-fg);
  border-radius: var(--radius);
  font-weight: 600;
  outline: 2px solid var(--surface);
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.6;
  min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button { cursor: pointer; font-family: inherit; }

/* ── Global keyboard focus (WCAG AA) ── */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ── Topbar ── */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  height: 52px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}
.topbar-left { display: flex; align-items: center; gap: 0.75rem; }
.logo {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--accent);
  letter-spacing: -0.5px;
}
.admin-badge {
  font-size: 0.65rem;
  font-weight: 600;
  padding: 1px 6px;
  border-radius: 999px;
  background: var(--chip-submitted-bg);
  color: var(--chip-submitted-fg);
  vertical-align: middle;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.cohort-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2px 8px;
}
.topbar-nav { display: flex; align-items: center; gap: 0.25rem; }
.topbar-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  color: var(--muted);
  background: none;
  border: none;
  transition: color 0.15s, background 0.15s;
}
.topbar-icon:hover { color: var(--text); background: var(--surface-2); text-decoration: none; }

/* Theme toggle icon visibility */
.icon-sun { display: none; }
.icon-moon { display: block; }
[data-theme="dark"] .icon-sun  { display: block; }
[data-theme="dark"] .icon-moon { display: none; }

.logout-form { display: inline; }
.btn-ghost {
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.8rem;
  padding: 4px 10px;
  border-radius: var(--radius);
  transition: color 0.15s, border-color 0.15s;
}
.btn-ghost:hover { color: var(--text); border-color: var(--muted); }

/* ── Layout ── */
.layout {
  display: grid;
  grid-template-columns: 200px 1fr;
  min-height: calc(100vh - 52px);
}

/* ── Sidebar ── */
.sidebar {
  border-right: 1px solid var(--border);
  padding: 1.25rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 2px;
  background: var(--surface);
}
.sidebar-link {
  display: block;
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius);
  color: var(--muted);
  font-size: 0.9rem;
  transition: color 0.15s, background 0.15s;
}
.sidebar-link:hover { color: var(--text); background: var(--surface-2); text-decoration: none; }
.sidebar-link.active { color: var(--text); background: var(--surface-2); }

/* ── Main content ── */
.main-content { padding: 2rem 2.5rem; max-width: 1100px; }

/* ── Page header ── */
.page-header { margin-bottom: 1.75rem; }
.page-header h1 { font-size: 1.5rem; font-weight: 600; }
.page-sub { color: var(--muted); font-size: 0.9rem; margin-top: 0.25rem; }

/* ── Cards ── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow);
}
.card-title {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 1rem;
}

/* ── Dashboard grid ── */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}
@media (max-width: 768px) { .dashboard-grid { grid-template-columns: 1fr; } }

/* ── Action list ── */
.action-list { list-style: none; display: flex; flex-direction: column; gap: 0.75rem; }
.action-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
}
.action-item:last-child { border-bottom: none; }
.action-body { flex: 1; display: flex; flex-direction: column; gap: 1px; }
.action-title { font-size: 0.9rem; }
.action-course { font-size: 0.75rem; }
.action-link { font-size: 0.8rem; color: var(--accent); white-space: nowrap; }

/* ── Schedule list ── */
.schedule-list { list-style: none; display: flex; flex-direction: column; gap: 0.75rem; }
.schedule-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
}
.schedule-item:last-child { border-bottom: none; }
.schedule-time { font-family: var(--font-mono); font-size: 0.78rem; color: var(--muted); white-space: nowrap; width: 60px; }
.schedule-body { flex: 1; display: flex; align-items: center; gap: 0.5rem; }
.schedule-title { font-size: 0.9rem; }
.event-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.event-kind-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; background: var(--muted); }
.event-kind-dot--lecture         { background: var(--muted); }
.event-kind-dot--coaching-1on1   { background: var(--teal); }
.event-kind-dot--deadline        { background: var(--orange); }
.event-kind-dot--exam            { background: var(--red); }
.event-kind-dot--quiz            { background: var(--green); }
.event-kind-dot--lab-session     { background: var(--accent); }
.btn-sm { font-size: 0.75rem; padding: 0.2rem 0.6rem; }

/* ── Kind badges ── */
.kind-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
  white-space: nowrap;
}
.kind-project, .event-dot.kind-lab { background: var(--kind-project-bg); color: var(--kind-project-fg); }
.kind-exam                          { background: var(--kind-exam-bg);    color: var(--kind-exam-fg); }
.kind-quiz                          { background: var(--kind-quiz-bg);    color: var(--kind-quiz-fg); }
.kind-lab                           { background: var(--kind-project-bg); color: var(--kind-project-fg); }
.kind-lecture .event-dot            { background: var(--muted); }
.kind-coaching_1on1 .event-dot      { background: var(--teal); }
.kind-deadline .event-dot           { background: var(--orange); }

/* ── Status chips ── */
.status-chip {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.status-complete, .status-chip.status-complete                     { background: var(--chip-complete-bg);   color: var(--chip-complete-fg); }
.status-revision-requested, .status-chip.status-revision-requested { background: var(--chip-revision-bg);   color: var(--chip-revision-fg); }
.status-submitted, .status-chip.status-submitted                   { background: var(--chip-submitted-bg);  color: var(--chip-submitted-fg); }
.status-in-review, .status-chip.status-in-review                   { background: var(--chip-in-review-bg);  color: var(--chip-in-review-fg); }
.status-incomplete, .status-chip.status-incomplete                 { background: var(--chip-incomplete-bg); color: var(--chip-incomplete-fg); }
.status-pending, .status-chip.status-pending                       { background: var(--chip-pending-bg);    color: var(--chip-pending-fg); }
/* Assessment kind chips reuse kind palette */
.status-chip.status-quiz           { background: var(--kind-quiz-bg);    color: var(--kind-quiz-fg); }
.status-chip.status-exam           { background: var(--kind-exam-bg);    color: var(--kind-exam-fg); }
.status-chip.status-short-answer,
.status-chip.status-code-snippet   { background: var(--chip-pending-bg); color: var(--chip-pending-fg); }

/* ── Progress bars ── */
.progress-list { display: flex; flex-direction: column; gap: 0.75rem; }
.progress-row { display: flex; align-items: center; gap: 0.75rem; }
.progress-label { font-size: 0.85rem; flex: 1; }
.progress-track {
  width: 120px;
  height: 6px;
  background: var(--surface-2);
  border-radius: 3px;
  overflow: hidden;
}
.progress-fill { height: 100%; background: var(--accent); border-radius: 3px; transition: width 0.4s ease; }
.progress-fill--warn { background: var(--orange); }
.progress-count { font-family: var(--font-mono); font-size: 0.75rem; white-space: nowrap; }

/* ── Buttons ── */
.btn-primary {
  display: inline-block;
  background: var(--accent);
  color: var(--btn-primary-fg);
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: opacity 0.15s;
}
.btn-primary:hover { opacity: 0.85; text-decoration: none; }
.btn-secondary {
  display: inline-block;
  background: var(--surface-2);
  color: var(--text);
  font-size: 0.875rem;
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.15s;
}
.btn-secondary:hover { border-color: var(--muted); text-decoration: none; }
.btn-join {
  display: inline-block;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--teal);
  border: 1px solid var(--teal);
  padding: 2px 8px;
  border-radius: var(--radius);
  white-space: nowrap;
}
.btn-join:hover { background: color-mix(in srgb, var(--teal) 10%, transparent); text-decoration: none; }

/* ── Empty states ── */
.empty-state { color: var(--muted); font-size: 0.875rem; padding: 0.5rem 0; }

/* ── Utility ── */
.muted { color: var(--muted); }
.stat-num { font-size: 1.75rem; font-weight: 700; font-family: var(--font-mono); }

/* ── Alert / banner ── */
.alert {
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  margin-bottom: 1rem;
  border: 1px solid transparent;
}
.alert-warning {
  background: var(--chip-revision-bg);
  color: var(--chip-revision-fg);
  border-color: var(--yellow);
}
.alert-danger {
  background: var(--chip-in-review-bg);
  color: var(--chip-exam-fg, var(--red));
  border-color: var(--red);
}

/* ── Login page ── */
.login-body {
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}
.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  width: 100%;
  max-width: 380px;
  box-shadow: var(--shadow);
}
.login-logo {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 0.25rem;
}
.login-sub { color: var(--muted); font-size: 0.85rem; margin-bottom: 1.5rem; }
.login-error {
  background: color-mix(in srgb, var(--red) 10%, transparent);
  border: 1px solid var(--red);
  color: var(--red);
  border-radius: var(--radius);
  padding: 0.5rem 0.75rem;
  font-size: 0.85rem;
  margin-bottom: 1rem;
}
.login-form { display: flex; flex-direction: column; gap: 0.5rem; }
.login-form label { font-size: 0.8rem; color: var(--muted); font-weight: 500; margin-top: 0.5rem; }
.login-form input {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius);
  padding: 0.5rem 0.75rem;
  font-size: 0.9rem;
  font-family: inherit;
  transition: border-color 0.15s;
}
.login-form input:focus-visible { outline: none; border-color: var(--accent); }
.login-form button {
  margin-top: 1rem;
  background: var(--accent);
  color: var(--btn-primary-fg);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.6rem;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: opacity 0.15s;
}
.login-form button:hover { opacity: 0.85; }

/* ── Admin: Forms ── */
.form-row {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  margin-bottom: 1rem;
}
.form-row label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
}
.form-row .muted { font-weight: 400; font-size: 0.8rem; }
.input {
  width: 100%;
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-size: 0.9rem;
  font-family: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.input:focus-visible {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent);
}
.input-sm { width: auto; }
select.input { cursor: pointer; }
textarea.input { resize: vertical; }
.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  cursor: pointer;
}
.form-actions { display: flex; gap: 0.75rem; align-items: center; margin-top: 0.5rem; }

/* ── Admin: Data table ── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
.data-table th {
  text-align: left;
  padding: 0.5rem 0.75rem;
  border-bottom: 2px solid var(--border);
  color: var(--muted);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.data-table td {
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--surface-2); }
.row-highlight-warn td { background: color-mix(in srgb, var(--orange) 8%, var(--surface)); }

/* ── Admin: Grading ── */
.question-header { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.6rem; }
.grading-row { display: flex; flex-wrap: wrap; gap: 1rem; }
.answer-text {
  width: 100%;
  padding: 0.6rem 0.75rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text);
}

/* ── Syllabus ── */
.syllabus { display: flex; flex-direction: column; gap: 0.75rem; }
.module-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.module-block.module-locked { opacity: 0.6; }
.module-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.25rem;
  cursor: pointer;
  list-style: none;
  user-select: none;
}
.module-header::-webkit-details-marker { display: none; }
.module-header:hover { background: var(--surface-2); }
.module-header-left { display: flex; align-items: center; gap: 0.6rem; flex: 1; }
.module-position {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  flex-shrink: 0;
}
.module-title { font-size: 0.95rem; font-weight: 600; }
.module-progress-mini { display: flex; align-items: center; gap: 0.5rem; flex-shrink: 0; }
.gate-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--gate-locked-bg);
  color: var(--gate-locked-fg);
  white-space: nowrap;
}
.gate-chip.gate-open { background: var(--gate-open-bg); color: var(--gate-open-fg); }

/* ── Content list ── */
.content-list { list-style: none; border-top: 1px solid var(--border); }
.content-row {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.55rem 1.25rem;
  border-bottom: 1px solid var(--border);
  transition: background 0.1s;
}
.content-row:last-child { border-bottom: none; }
.content-row:hover { background: var(--surface-2); }
.content-row.content-done .content-title { color: var(--muted); text-decoration: line-through; }
.content-check-wrap { flex-shrink: 0; }
.content-check { accent-color: var(--accent); width: 15px; height: 15px; cursor: pointer; }
.content-check:disabled { cursor: default; }
.content-title { flex: 1; font-size: 0.875rem; }
.content-optional { color: var(--muted); }
.content-actions { display: flex; gap: 0.4rem; flex-shrink: 0; }

/* ── Assessment ── */
.assessment-instructions { color: var(--muted); margin-bottom: 1rem; }
.assessment-meta { display: flex; gap: 0.75rem; align-items: center; flex-wrap: wrap; margin-top: 0.5rem; }
.badge { display: inline-block; padding: 0.2rem 0.6rem; border-radius: 999px; font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; }
.badge-quiz { background: var(--accent); color: #fff; }
.badge-exam { background: #6f42c1; color: #fff; }
.timer-badge { font-size: 0.85rem; font-weight: 600; color: var(--text); background: var(--surface-2); padding: 0.2rem 0.6rem; border-radius: 6px; border: 1px solid var(--border); }
.timer-badge--urgent { color: var(--red); background: color-mix(in srgb, var(--red) 10%, var(--surface)); }
.attempts-badge { font-size: 0.8rem; color: var(--muted); }
.assessment-form { display: flex; flex-direction: column; gap: 1.25rem; margin-top: 1.5rem; }
.question-card { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 1.25rem; box-shadow: var(--shadow); }
.question-number { font-size: 0.75rem; font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; }
.question-points { font-size: 0.75rem; color: var(--muted); }
.question-body { margin: 0 0 1rem; font-size: 0.95rem; line-height: 1.5; }
.choices { display: flex; flex-direction: column; gap: 0.5rem; }
.choices--tf { flex-direction: row; gap: 1rem; }
.choice-label { display: flex; align-items: center; gap: 0.6rem; cursor: pointer; padding: 0.5rem 0.75rem; border: 1px solid var(--border); border-radius: 7px; transition: border-color 0.15s, background 0.15s; }
.choice-label:has(input:checked) { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, transparent); }
.choice-text { font-size: 0.9rem; }
.text-answer { width: 100%; padding: 0.6rem 0.75rem; border: 1px solid var(--border); border-radius: 7px; background: var(--surface-2); color: var(--text); font-size: 0.9rem; font-family: inherit; resize: vertical; }
.form-actions { display: flex; justify-content: flex-end; padding-top: 0.5rem; }
.btn-submit { min-width: 140px; }

/* ── Result ── */
.result-card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 2rem; margin-top: 1.5rem; display: flex; flex-direction: column; gap: 1.25rem; box-shadow: var(--shadow); }
.result-score { display: flex; align-items: baseline; gap: 0.5rem; }
.score-display { font-size: 2.5rem; font-weight: 700; color: var(--text); }
.score-label { font-size: 1rem; color: var(--muted); }
.cohort-avg { display: flex; align-items: center; gap: 0.75rem; font-size: 0.9rem; color: var(--muted); }
.cohort-avg-value { font-weight: 600; color: var(--text); }
.result-state { display: flex; align-items: flex-start; gap: 1rem; padding: 1rem; border-radius: 8px; }
.result-state--passed { background: var(--chip-complete-bg); color: var(--chip-complete-fg); }
.result-state--passed svg { color: var(--green); flex-shrink: 0; margin-top: 2px; }
.result-state--not-passed { background: var(--chip-revision-bg); color: var(--chip-revision-fg); }
.result-state--not-passed svg { color: var(--orange); flex-shrink: 0; margin-top: 2px; }
.result-state-heading { font-weight: 600; margin: 0 0 0.2rem; }
.result-state-detail { margin: 0; font-size: 0.875rem; }
.result-actions { display: flex; gap: 0.75rem; margin-top: 1.5rem; flex-wrap: wrap; }
.attempts-exhausted { font-size: 0.875rem; color: var(--muted); margin: 0; align-self: center; }

/* ── Responsive ── */
@media (max-width: 640px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .main-content { padding: 1.25rem; }
}

/* ── Project ── */
.project-brief { margin-top: 1.25rem; }
.brief-subheading { font-size: 0.95rem; font-weight: 600; margin: 1rem 0 0.4rem; }
.starter-repo, .due-date { font-size: 0.875rem; color: var(--muted); margin: 0.5rem 0 0; }
.markdown-body { font-size: 0.9rem; line-height: 1.65; white-space: pre-wrap; }
.completion-banner { display: flex; align-items: flex-start; gap: 1rem; padding: 1.25rem; background: var(--chip-complete-bg); border: 1px solid var(--green); border-radius: 10px; margin-top: 1.25rem; color: var(--chip-complete-fg); }
.completion-banner svg { flex-shrink: 0; margin-top: 2px; color: var(--green); }
.completion-heading { font-weight: 700; margin: 0 0 0.2rem; font-size: 1rem; }
.completion-detail { margin: 0; font-size: 0.875rem; }
.feedback-card { margin-top: 1.25rem; }
.rubric-heading { font-size: 0.95rem; font-weight: 600; margin: 1.25rem 0 0.5rem; }
.rubric-table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
.rubric-table th { text-align: left; padding: 0.4rem 0.6rem; border-bottom: 2px solid var(--border); color: var(--muted); font-weight: 600; }
.rubric-table td { padding: 0.4rem 0.6rem; border-bottom: 1px solid var(--border); vertical-align: top; }
.rubric-rating { display: inline-block; padding: 0.15rem 0.5rem; border-radius: 999px; font-size: 0.75rem; font-weight: 600; }
.rubric-rating--met        { background: var(--chip-complete-bg);   color: var(--chip-complete-fg); }
.rubric-rating--needs_work { background: var(--chip-revision-bg);   color: var(--chip-revision-fg); }
.rubric-rating--not_assessed { background: var(--surface-2); color: var(--muted); }
.submit-card { margin-top: 1.25rem; }
.submit-meta { font-size: 0.85rem; color: var(--muted); margin: 0 0 1rem; }
.submit-form { display: flex; flex-direction: column; gap: 0.75rem; }
.form-label { font-size: 0.875rem; font-weight: 600; }
.form-input { width: 100%; padding: 0.5rem 0.75rem; border: 1px solid var(--border); border-radius: 7px; background: var(--surface); color: var(--text); font-size: 0.9rem; font-family: inherit; box-sizing: border-box; }
.form-textarea { resize: vertical; }
.form-input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; border-color: transparent; }
.history-card { margin-top: 1.25rem; }
.submission-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.5rem; }
.submission-row { display: flex; align-items: center; gap: 0.75rem; font-size: 0.875rem; padding: 0.4rem 0; border-bottom: 1px solid var(--border); }
.sub-number { font-weight: 700; color: var(--muted); min-width: 2ch; }
.sub-date { color: var(--muted); flex: 1; }
.sub-link { font-size: 0.8rem; color: var(--accent); }
.status-pill { display: inline-flex; align-items: center; padding: 0.2rem 0.65rem; border-radius: 999px; font-size: 0.75rem; font-weight: 600; }
.status-pill--sm { font-size: 0.7rem; padding: 0.15rem 0.5rem; }
.status-pill--submitted       { background: var(--chip-submitted-bg);  color: var(--chip-submitted-fg); }
.status-pill--in-review       { background: var(--chip-in-review-bg);  color: var(--chip-in-review-fg); }
.status-pill--revision-requested { background: var(--chip-revision-bg); color: var(--chip-revision-fg); }
.status-pill--complete        { background: var(--chip-complete-bg);   color: var(--chip-complete-fg); }

/* ── Discussions ── */
.discussion-new-thread-form { margin-bottom: 1.5rem; }
.thread-form { display: flex; flex-direction: column; gap: 0.6rem; }
.discussion-thread-list { display: flex; flex-direction: column; gap: 0; }
.discussion-thread-row { display: flex; align-items: center; justify-content: space-between; padding: 0.85rem 1rem; border-bottom: 1px solid var(--border); gap: 1rem; }
.discussion-thread-row--pinned { background: color-mix(in srgb, var(--accent) 6%, var(--surface)); }
.discussion-thread-row:hover { background: var(--surface-2); }
.discussion-thread-main { flex: 1; min-width: 0; }
.discussion-pin-badge { display: inline-block; font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--accent); border: 1px solid var(--accent); border-radius: 4px; padding: 0.1rem 0.35rem; margin-right: 0.5rem; vertical-align: middle; }
.discussion-thread-title { font-weight: 600; color: var(--text); text-decoration: none; font-size: 0.95rem; }
.discussion-thread-title:hover { color: var(--accent); }
.discussion-thread-meta { font-size: 0.8rem; color: var(--muted); margin-top: 0.2rem; }
.discussion-reply-count { display: flex; flex-direction: column; align-items: center; min-width: 3.5rem; }
.discussion-reply-badge { font-weight: 700; font-size: 1.1rem; color: var(--accent); }
.discussion-reply-label { font-size: 0.7rem; color: var(--muted); }
.discussion-empty { color: var(--muted); padding: 2rem 0; text-align: center; }
.discussion-thread-detail { margin-bottom: 1.5rem; }
.discussion-thread-heading { font-size: 1.4rem; font-weight: 700; margin: 0 0 1rem; }
.discussion-thread-body { white-space: pre-wrap; font-size: 0.95rem; line-height: 1.65; margin-bottom: 0.75rem; }
.discussion-posts { display: flex; flex-direction: column; gap: 0.75rem; margin-bottom: 1.5rem; }
.discussion-post { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 1rem; }
.discussion-post--deleted { opacity: 0.55; font-style: italic; }
.discussion-post-header { display: flex; align-items: baseline; gap: 0.75rem; margin-bottom: 0.5rem; }
.discussion-post-author { font-size: 0.9rem; }
.discussion-post-date { font-size: 0.78rem; color: var(--muted); }
.discussion-post-body { font-size: 0.9rem; line-height: 1.6; white-space: pre-wrap; }
.discussion-reply-form { margin-bottom: 1.5rem; }
.discussion-locked-msg { color: var(--muted); font-size: 0.875rem; font-style: italic; margin-top: 1rem; }
.back-link { font-size: 0.875rem; color: var(--accent); text-decoration: none; display: inline-block; margin-bottom: 1rem; }
.back-link:hover { text-decoration: underline; }

/* ── Notifications ── */
.notification-feed { display: flex; flex-direction: column; gap: 0; }
.notification-item { display: flex; align-items: flex-start; gap: 1rem; padding: 0.9rem 1rem; border-bottom: 1px solid var(--border); }
.notification-item--unread { border-left: 3px solid var(--accent); background: color-mix(in srgb, var(--accent) 6%, var(--surface)); }
.notification-main { flex: 1; min-width: 0; }
.notification-title { font-weight: 600; font-size: 0.9rem; margin-bottom: 0.2rem; }
.notification-body { font-size: 0.85rem; color: var(--muted); margin-bottom: 0.2rem; }
.notification-meta { font-size: 0.78rem; color: var(--muted); }
.notification-link { color: var(--accent); text-decoration: none; }
.notification-link:hover { text-decoration: underline; }
.notification-read-form { flex-shrink: 0; }
.notification-read-btn { font-size: 0.85rem; padding: 0.2rem 0.6rem; }
.notification-empty { color: var(--muted); padding: 2rem 0; text-align: center; }
.btn--sm { font-size: 0.8rem; padding: 0.25rem 0.65rem; }

/* ── Topbar unread badge ── */
.topbar-icon--notif { position: relative; }
.unread-badge { position: absolute; top: -4px; right: -6px; background: var(--red); color: #fff; font-size: 0.65rem; font-weight: 700; min-width: 16px; height: 16px; line-height: 16px; text-align: center; border-radius: 999px; padding: 0 3px; }

/* ── User Badges ── */
.badge-section { margin-top: 1.5rem; }
.badge-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 1rem; margin-top: 0.75rem; }
.badge-card { display: flex; align-items: flex-start; gap: 0.75rem; background: var(--surface-2); border: 1px solid var(--border); border-radius: 10px; padding: 1rem; }
.badge-icon { width: 40px; height: 40px; object-fit: contain; flex-shrink: 0; }
.badge-icon-placeholder { font-size: 2rem; line-height: 1; flex-shrink: 0; }
.badge-info { flex: 1; min-width: 0; }
.badge-title { font-weight: 700; font-size: 0.9rem; margin-bottom: 0.2rem; }
.badge-description { font-size: 0.8rem; color: var(--muted); margin-bottom: 0.3rem; }
.badge-awarded-at { font-size: 0.75rem; color: var(--muted); }
.badge-empty { color: var(--muted); font-size: 0.875rem; }

/* ── Profile ── */
.profile-form { display: flex; flex-direction: column; gap: 0.65rem; }