/* MirjyTech Design System & Variables */
:root {
  --bg: #0d1117;
  --card-bg: #161b22;
  --border: #30363d;
  --fg: #c9d1d9;
  --fg-muted: #8b949e;
  --teal: #00b894;
  --teal-hover: #00a884;
  --accent: #58a6ff;
  --danger: #f85149;
  --success: #2ea043;
  --warning: #d29922;
  --code-bg: #0d1117;
  --sidebar-width: 280px;
}

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

body {
  background-color: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
}

.app-layout { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-width);
  background-color: var(--card-bg);
  border-right: 1px solid var(--border);
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; bottom: 0; left: 0;
  overflow-y: auto;
}

.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  padding: 32px 48px;
  max-width: 1000px;
}

.brand h1 { font-size: 1.5rem; color: #fff; letter-spacing: -0.5px; }
.brand h1 span { color: var(--teal); }
.brand p { font-size: 0.75rem; color: var(--fg-muted); margin-bottom: 20px; }
.brand-link { text-decoration: none; }

.user-info {
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px;
  margin-bottom: 20px;
  font-size: 0.85rem;
}
.user-details { display: flex; flex-direction: column; gap: 4px; margin-bottom: 8px; }
.user-email { color: var(--fg); font-weight: 500; word-break: break-all; }
.admin-badge { color: var(--teal); text-decoration: none; font-size: 0.75rem; }
.admin-badge:hover { text-decoration: underline; }
.logout-btn { color: var(--danger); text-decoration: none; font-size: 0.8rem; }
.logout-btn:hover { text-decoration: underline; }

.nav-menu { display: flex; flex-direction: column; gap: 4px; }
.nav-item {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px; color: var(--fg); text-decoration: none;
  border-radius: 6px; font-size: 0.9rem;
}
.nav-item:hover { background-color: rgba(255,255,255,0.05); }
.nav-item.active { background-color: rgba(0,184,148,0.15); color: var(--teal); font-weight: 600; }

/* Dashboard Tracks */
.dashboard-header { margin-bottom: 24px; }
.dashboard-header h2 { font-size: 1.8rem; margin-bottom: 4px; }
.highlight { color: var(--teal); }

.tracks-list { display: flex; flex-direction: column; gap: 24px; margin-top: 16px; }

.track-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
}
.track-card.active { border-color: var(--teal); }
.track-card.completed { border-color: rgba(46,160,67,0.4); }
.track-card.locked { opacity: 0.7; border-color: var(--border); background-color: rgba(22,27,34,0.6); }

.track-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 16px; }
.track-title-group { display: flex; gap: 16px; align-items: center; }
.track-step { font-size: 0.75rem; font-weight: 700; color: var(--accent); background: rgba(88,166,255,0.15); padding: 4px 8px; border-radius: 4px; text-transform: uppercase; }
.track-name { font-size: 1.3rem; color: #fff; }
.track-desc { font-size: 0.85rem; color: var(--fg-muted); }

.badge { font-size: 0.8rem; font-weight: 600; padding: 4px 10px; border-radius: 12px; }
.badge-active { background-color: rgba(0,184,148,0.2); color: var(--teal); border: 1px solid var(--teal); }
.badge-completed, .badge-success { background-color: rgba(46,160,67,0.2); color: #3fb950; }
.badge-locked { background-color: rgba(139,148,158,0.2); color: var(--fg-muted); }

/* Feather icon baseline sizing */
.feather {
  width: 16px; height: 16px;
  stroke: currentColor; fill: none;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
  vertical-align: -2px;
  flex-shrink: 0;
}
.stat-icon .feather { width: 22px; height: 22px; vertical-align: middle; }
.nav-item .feather { width: 15px; height: 15px; vertical-align: -2px; }
.user-email .feather { width: 14px; height: 14px; }
.admin-badge .feather { width: 13px; height: 13px; }
.logout-btn .feather { width: 14px; height: 14px; }
.btn-reset-pw .feather { width: 13px; height: 13px; vertical-align: -1px; }
.btn .feather { width: 15px; height: 15px; vertical-align: -2px; }
.modal-close .feather { width: 16px; height: 16px; vertical-align: -2px; }
.pw-toggle .feather { width: 15px; height: 15px; vertical-align: -2px; }

/* Course letter avatars — replaces emoji icons */
.course-letter-badge {
  width: 40px; height: 40px; border-radius: 8px;
  background: linear-gradient(135deg, var(--teal), var(--accent));
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 1.1rem; color: #fff;
  flex-shrink: 0; text-transform: uppercase;
}
.course-letter-avatar {
  width: 40px; height: 40px; border-radius: 8px;
  background: linear-gradient(135deg, var(--teal), var(--accent));
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 1.2rem; color: #fff;
  text-transform: uppercase; margin-bottom: 10px;
}
/* Empty state icon wrapper for feather */
.empty-icon-wrap {
  display: flex; justify-content: center; margin-bottom: 14px;
  color: var(--border);
}
.empty-icon-wrap .feather { width: 48px; height: 48px; }

.progress-bar-bg { background-color: var(--bg); border-radius: 6px; height: 8px; overflow: hidden; margin-bottom: 8px; }
.progress-bar-fill { background-color: var(--teal); height: 100%; transition: width 0.3s ease; }
.progress-stats { font-size: 0.85rem; color: var(--fg-muted); margin-bottom: 16px; }

.chapters-accordion { display: flex; flex-direction: column; gap: 12px; margin-top: 16px; }
.chapter-block { background-color: var(--bg); border: 1px solid var(--border); border-radius: 6px; padding: 12px 16px; }
.chapter-title { font-weight: 600; color: #fff; margin-bottom: 8px; font-size: 0.95rem; }

.topic-list { list-style: none; display: flex; flex-direction: column; gap: 6px; }
.topic-link { display: flex; align-items: center; gap: 10px; color: var(--fg); text-decoration: none; font-size: 0.9rem; }
.topic-link:hover { color: var(--teal); }
.dot { width: 8px; height: 8px; border-radius: 50%; border: 2px solid var(--fg-muted); flex-shrink: 0; }

.locked-overlay {
  padding: 16px;
  background-color: rgba(139,148,158,0.05);
  border: 1px dashed var(--border);
  border-radius: 6px;
  font-size: 0.9rem;
  color: var(--fg-muted);
  text-align: center;
  margin-top: 12px;
}

/* Lesson Page */
.breadcrumb { font-size: 0.85rem; color: var(--fg-muted); margin-bottom: 8px; }
.breadcrumb a { color: var(--teal); text-decoration: none; }
.page-title { font-size: 2rem; margin-bottom: 24px; color: #fff; }

.lesson-body { font-size: 1rem; margin-bottom: 32px; }
.lesson-body h3 { font-size: 1.3rem; color: #fff; margin: 24px 0 12px 0; border-bottom: 1px solid var(--border); padding-bottom: 6px; }
.lesson-body p { margin-bottom: 12px; }
.lesson-body ul, .lesson-body ol { margin: 0 0 16px 24px; }
.lesson-body li { margin-bottom: 4px; }

.key-concept, .common-mistake, .real-world {
  padding: 16px; border-radius: 6px; margin: 20px 0; border-left: 4px solid;
}
.key-concept { background-color: rgba(88,166,255,0.1); border-color: var(--accent); }
.key-concept h4 { color: var(--accent); margin-bottom: 8px; }
.common-mistake { background-color: rgba(248,81,73,0.1); border-color: var(--danger); }
.common-mistake h4 { color: var(--danger); margin-bottom: 8px; }
.real-world { background-color: rgba(0,184,148,0.1); border-color: var(--teal); }
.real-world h4 { color: var(--teal); margin-bottom: 8px; }

.codeblock {
  background-color: var(--code-bg);
  border: 1px solid var(--border); border-radius: 6px;
  padding: 14px 18px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.9rem; color: #e6edf3; white-space: pre-wrap; margin: 12px 0 20px 0; overflow-x: auto;
}

/* Playground */
.playground {
  background-color: var(--card-bg); border: 1px solid var(--border);
  border-radius: 8px; overflow: hidden; margin: 32px 0;
}
.pg-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 16px; background-color: #1f242c; border-bottom: 1px solid var(--border);
}
.dots { display: flex; gap: 6px; }
.dots span { width: 10px; height: 10px; border-radius: 50%; background-color: #ff5f56; }
.dots span:nth-child(2) { background-color: #ffbd2e; }
.dots span:nth-child(3) { background-color: #27c93f; }
.pg-head h4 { font-size: 0.85rem; color: var(--fg-muted); }
.engine-badge { font-size: 0.7rem; color: var(--teal); background-color: rgba(0,184,148,0.1); padding: 2px 6px; border-radius: 4px; }

.pg-editor {
  width: 100%; height: 180px; background-color: var(--code-bg);
  color: #e6edf3; border: none; padding: 16px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.95rem; resize: vertical; outline: none;
}

.pg-actions {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 16px; background-color: #1f242c;
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
}
.pg-status { font-size: 0.8rem; color: var(--fg-muted); margin-left: auto; }

.pg-output {
  padding: 16px; background-color: #05070a; color: #7ee787;
  font-family: monospace; font-size: 0.9rem; min-height: 80px; white-space: pre-wrap;
}
.pg-output.empty { color: var(--fg-muted); }
.pg-output .err { color: var(--danger); }

.html-preview-frame {
  width: 100%; height: 160px; background-color: #ffffff;
  border: none; border-top: 1px solid var(--border);
}
.preview-title { padding: 8px 16px; font-size: 0.8rem; color: var(--fg-muted); background: #161b22; }

.check-task {
  padding: 12px 16px; background-color: rgba(88,166,255,0.08);
  border-top: 1px solid var(--border); font-size: 0.9rem; color: var(--accent);
}

/* Quiz & Checklist */
.quiz-card, .checklist-card {
  background-color: var(--card-bg); border: 1px solid var(--border);
  border-radius: 8px; padding: 24px; margin: 32px 0;
}
.quiz-card h3, .checklist-card h3 { font-size: 1.2rem; color: #fff; margin-bottom: 4px; }
.subtitle { font-size: 0.85rem; color: var(--fg-muted); margin-bottom: 20px; }

.qcard { margin-bottom: 20px; }
.qtext { font-weight: 600; color: #fff; margin-bottom: 10px; }
.qopt {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px; background-color: var(--bg);
  border: 1px solid var(--border); border-radius: 6px;
  margin-bottom: 8px; cursor: pointer; font-size: 0.9rem;
}
.qopt:hover { border-color: var(--teal); }
.qopt.selected { border-color: var(--teal); background-color: rgba(0,184,148,0.1); }

.chk-item {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px; background-color: var(--bg);
  border: 1px solid var(--border); border-radius: 6px;
  margin-bottom: 8px; cursor: pointer;
}
.chk-item.checked { border-color: var(--teal); background-color: rgba(0,184,148,0.08); text-decoration: line-through; color: var(--fg-muted); }

/* Buttons */
.btn {
  padding: 8px 16px; border-radius: 6px; border: none;
  font-size: 0.9rem; font-weight: 500; cursor: pointer;
  text-decoration: none; display: inline-flex; align-items: center; justify-content: center;
}
.btn-primary { background-color: var(--teal); color: #fff; }
.btn-primary:hover { background-color: var(--teal-hover); }
.btn-secondary { background-color: var(--border); color: var(--fg); }
.btn-secondary:hover { background-color: rgba(255,255,255,0.1); }
.btn-success { background-color: var(--success); color: #fff; }
.btn-complete { background-color: rgba(0,184,148,0.2); color: var(--teal); border: 1px solid var(--teal); }
.btn-run { background-color: var(--teal); color: #fff; }
.btn-reset { background-color: transparent; color: var(--fg-muted); border: 1px solid var(--border); }
.btn-block { width: 100%; }

.page-nav { display: flex; justify-content: space-between; align-items: center; margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--border); }

.alert { padding: 12px 16px; border-radius: 6px; font-size: 0.9rem; margin-bottom: 20px; }
.alert-warning { background-color: rgba(210,153,34,0.15); border: 1px solid var(--warning); color: #e3b341; }
.alert-error { background-color: rgba(248,81,73,0.15); border: 1px solid var(--danger); color: var(--danger); }

/* Login Page */
.login-body {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; background-color: var(--bg);
}
.login-card {
  width: 100%; max-width: 400px; background-color: var(--card-bg);
  border: 1px solid var(--border); border-radius: 12px; padding: 36px 32px;
}
.login-brand { text-align: center; margin-bottom: 24px; }
.login-brand h1 { font-size: 2rem; color: #fff; }
.login-brand h1 span { color: var(--teal); }
.login-brand p { font-size: 0.8rem; color: var(--fg-muted); }
.login-card h2 { font-size: 1.3rem; margin-bottom: 4px; color: #fff; }
.login-sub { font-size: 0.85rem; color: var(--fg-muted); margin-bottom: 24px; }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-size: 0.85rem; color: var(--fg-muted); }
.form-group input {
  width: 100%; padding: 10px 14px; background-color: var(--bg);
  border: 1px solid var(--border); border-radius: 6px; color: var(--fg);
  font-size: 0.95rem; outline: none;
}
.form-group input:focus { border-color: var(--teal); }
.login-footer { text-align: center; margin-top: 24px; color: var(--fg-muted); }

/* ════════════════════════════════════════════════════════════
   ADMIN DASHBOARD
════════════════════════════════════════════════════════════ */
.admin-page { padding-bottom: 64px; }

.admin-header {
  display: flex; justify-content: space-between; align-items: flex-start;
  margin-bottom: 32px; gap: 16px; flex-wrap: wrap;
}
.admin-title { font-size: 1.9rem; color: #fff; margin-bottom: 4px; }
.admin-subtitle { font-size: 0.9rem; color: var(--fg-muted); }

/* Stat Cards */
.stat-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 16px;
  margin-bottom: 36px;
}
.stat-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: border-color 0.2s;
}
.stat-card:hover { border-color: var(--teal); }
.stat-icon {
  width: 48px; height: 48px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  background: rgba(139,148,158,.12);
  color: var(--fg-muted);
  flex-shrink: 0;
}
.stat-value { font-size: 2rem; font-weight: 700; color: #fff; line-height: 1; }
.stat-label { font-size: 0.8rem; color: var(--fg-muted); margin-top: 4px; }

/* Section block */
.section-block {
  background-color: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  margin-bottom: 28px;
}
.section-title {
  font-size: 1.1rem; color: #fff; font-weight: 600;
  margin-bottom: 18px; padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

/* Course breakdown row */
.course-cards-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}
.course-stat-card {
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 18px;
}
.course-stat-icon { font-size: 2rem; margin-bottom: 8px; }
.course-stat-title { font-size: 1rem; font-weight: 600; color: #fff; margin-bottom: 2px; }
.course-stat-meta { font-size: 0.78rem; color: var(--fg-muted); margin-bottom: 12px; }
.course-stat-row {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 0.85rem; color: var(--fg-muted); margin-bottom: 6px;
}
.course-stat-row strong { color: var(--fg); }

/* Student table */
.admin-table-wrap {
  overflow-x: auto;
  border-radius: 8px;
  border: 1px solid var(--border);
}
.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
.admin-table thead th {
  background-color: rgba(255,255,255,0.04);
  padding: 12px 16px;
  text-align: left;
  color: var(--fg-muted);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.admin-table tbody td {
  padding: 14px 16px;
  border-bottom: 1px solid rgba(48,54,61,0.5);
  vertical-align: middle;
  color: var(--fg);
}
.student-row:last-child td { border-bottom: none; }
.student-row:hover td { background-color: rgba(255,255,255,0.025); }

.student-name-cell { display: flex; align-items: center; gap: 12px; }
.student-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: linear-gradient(135deg, var(--teal), var(--accent));
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.9rem; color: #fff;
  flex-shrink: 0;
}
.student-uname { font-weight: 600; color: #fff; }
.student-email-small { font-size: 0.78rem; color: var(--fg-muted); }
.muted-cell { color: var(--fg-muted); font-size: 0.82rem; white-space: nowrap; }
.muted-text { color: var(--fg-muted); }

/* Per-course progress in table */
.table-progress-wrap { min-width: 110px; }
.table-progress-bar-bg {
  background-color: var(--bg);
  border-radius: 4px;
  height: 6px;
  overflow: hidden;
  margin-bottom: 5px;
}
.table-progress-bar-fill {
  background-color: var(--teal);
  height: 100%;
  transition: width 0.4s ease;
}
.table-progress-bar-fill.finished { background-color: #2ea043; }
.table-progress-label { font-size: 0.78rem; color: var(--fg-muted); }

/* Reset PW button (inline table) */
.btn-reset-pw {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 5px 10px;
  border-radius: 5px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--fg-muted);
  font-size: 0.8rem;
  cursor: pointer;
  white-space: nowrap;
  transition: border-color 0.15s, color 0.15s;
}
.btn-reset-pw:hover { border-color: var(--accent); color: var(--accent); }
.btn-sm { padding: 4px 10px; font-size: 0.8rem; }

/* Empty state */
.empty-state {
  text-align: center;
  padding: 48px 16px;
  color: var(--fg-muted);
}
/* Alert success */
.alert-success {
  background-color: rgba(46,160,67,0.15);
  border: 1px solid var(--success);
  color: #3fb950;
}

/* ── MODALS ─────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.65);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}
.modal-overlay.visible {
  opacity: 1;
  pointer-events: all;
}
.modal-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 32px;
  width: 100%;
  max-width: 420px;
  transform: translateY(12px);
  transition: transform 0.2s;
}
.modal-overlay.visible .modal-card { transform: translateY(0); }
.modal-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 8px;
}
.modal-header h3 { font-size: 1.15rem; color: #fff; }
.modal-close {
  background: none; border: none; color: var(--fg-muted);
  font-size: 1.1rem; cursor: pointer; padding: 0 4px;
}
.modal-close:hover { color: var(--danger); }
.modal-sub { font-size: 0.85rem; color: var(--fg-muted); margin-bottom: 20px; }
.modal-form { display: flex; flex-direction: column; gap: 4px; }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 8px; }
.pw-input-wrap { position: relative; }
.pw-input-wrap input { width: 100%; padding-right: 40px; }
.pw-toggle {
  position: absolute; right: 10px; top: 50%; transform: translateY(-50%);
  background: none; border: none; cursor: pointer; font-size: 1rem; padding: 0;
  color: var(--fg-muted);
}
.pw-toggle:hover { color: var(--fg); }

/* ════════════════════════════════════════════════════════════
   STUDENT DETAIL / TRACK EDITOR
════════════════════════════════════════════════════════════ */

/* Clickable student name in admin table */
.student-link {
  color: var(--fg);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.15s;
}
.student-link:hover { color: var(--teal); }

/* Two-panel grid */
.track-editor-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}
@media (max-width: 900px) {
  .track-editor-grid { grid-template-columns: 1fr; }
}
.track-editor-panel { height: fit-content; }

.section-title-row {
  display: flex; align-items: center; justify-content: space-between;
  padding-bottom: 12px; border-bottom: 1px solid var(--border);
  margin-bottom: 0;
}
.track-count-badge {
  font-size: 0.75rem; font-weight: 600;
  background: rgba(88,166,255,.15); color: var(--accent);
  padding: 3px 10px; border-radius: 12px;
}

/* Sortable track list */
.track-sort-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 60px;
}
.track-sort-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: grab;
  transition: border-color 0.15s, background-color 0.15s;
}
.track-sort-item:hover { border-color: var(--teal); }
.track-sort-item.dragging { opacity: 0.5; cursor: grabbing; }
.track-sort-item.drag-over {
  border-color: var(--accent);
  background-color: rgba(88,166,255,0.06);
}
.drag-handle {
  color: var(--border);
  cursor: grab;
  flex-shrink: 0;
}
.drag-handle .feather { width: 16px; height: 16px; }
.drag-handle:hover { color: var(--fg-muted); }

.track-sort-num {
  width: 24px; height: 24px; border-radius: 50%;
  background: rgba(88,166,255,.15); color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem; font-weight: 700;
  flex-shrink: 0;
}
.track-sort-info {
  flex: 1;
  min-width: 0;
}
.track-sort-name {
  font-weight: 600; color: #fff;
  font-size: 0.9rem;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.track-sort-progress {
  display: flex; align-items: center; gap: 8px; margin-top: 5px;
}

.track-remove-btn {
  background: none; border: none; cursor: pointer;
  color: var(--border); padding: 4px; border-radius: 4px;
  display: flex; align-items: center; justify-content: center;
  transition: color 0.15s, background-color 0.15s;
  flex-shrink: 0;
}
.track-remove-btn:hover { color: var(--danger); background: rgba(248,81,73,0.1); }
.track-remove-btn .feather { width: 15px; height: 15px; }

/* Track empty state */
.track-empty-msg {
  padding: 20px;
  text-align: center;
  color: var(--fg-muted);
  font-size: 0.875rem;
  border: 1px dashed var(--border);
  border-radius: 8px;
}

/* Available courses list */
.available-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-bottom: 1px solid rgba(48,54,61,0.5);
  transition: background-color 0.1s;
}
.available-item:last-child { border-bottom: none; }
.available-item:hover { background-color: rgba(255,255,255,0.025); border-radius: 6px; }

.btn-add-course {
  margin-left: auto;
  display: inline-flex; align-items: center; gap: 5px;
  padding: 5px 12px;
  border-radius: 6px;
  border: 1px solid var(--teal);
  background: rgba(0,184,148,0.1);
  color: var(--teal);
  font-size: 0.82rem; font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.15s;
  flex-shrink: 0;
}
.btn-add-course:hover { background: rgba(0,184,148,0.2); }
.btn-add-course .feather { width: 13px; height: 13px; }

.all-assigned-msg {
  padding: 16px;
  text-align: center;
  color: var(--fg-muted);
  font-size: 0.875rem;
  border: 1px dashed var(--border);
  border-radius: 8px;
  margin-top: 8px;
}

/* ════════════════════════════════════════════════════════════
   QUIZ FEEDBACK & SCORE RETAKE STYLES
════════════════════════════════════════════════════════════ */

.hidden { display: none !important; }

.quiz-header-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.quiz-score-badge {
  background: rgba(0, 184, 148, 0.12);
  border: 1px solid var(--teal);
  color: var(--fg);
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 0.85rem;
}
.quiz-score-badge strong {
  color: var(--teal);
}

.attempt-tag {
  background: rgba(88, 166, 255, 0.18);
  color: var(--accent);
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.75rem;
  margin-left: 6px;
}

/* Quiz Score Result Banner */
.quiz-result-banner {
  padding: 16px 20px;
  border-radius: 8px;
  margin-top: 16px;
  border: 1px solid;
}
.banner-pass {
  background-color: rgba(46, 160, 67, 0.15);
  border-color: var(--success);
  color: #3fb950;
}
.banner-fail {
  background-color: rgba(210, 153, 34, 0.15);
  border-color: var(--warning);
  color: #e3b341;
}
.banner-warning {
  background-color: rgba(248, 81, 73, 0.15);
  border-color: var(--danger);
  color: var(--danger);
}

.result-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.result-score {
  font-size: 1rem;
  margin-bottom: 2px;
}
.result-meta {
  font-size: 0.78rem;
  opacity: 0.85;
}

/* Option feedback states */
.qopt.opt-correct {
  border-color: #2ea043 !important;
  background-color: rgba(46, 160, 67, 0.15) !important;
  color: #3fb950 !important;
  font-weight: 600;
}

.qopt.opt-wrong {
  border-color: var(--danger) !important;
  background-color: rgba(248, 81, 73, 0.15) !important;
  color: #ff7b72 !important;
}

.opt-feedback {
  margin-left: auto;
  font-size: 0.8rem;
  font-weight: 600;
}

/* Admin Attempt History Log Pills */
.attempt-log-pills {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  align-items: center;
}
.attempt-pill {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 6px;
  border: 1px solid;
  white-space: nowrap;
}
.pill-pass {
  background-color: rgba(46, 160, 67, 0.15);
  border-color: rgba(46, 160, 67, 0.4);
  color: #3fb950;
}
.pill-fail {
  background-color: rgba(210, 153, 34, 0.15);
  border-color: rgba(210, 153, 34, 0.4);
  color: #e3b341;
}