/* ============================================================
   LMS — สไตล์ของโมดูลอีเลิร์นนิ่ง
   ใช้ร่วมกันทั้งหน้าบ้าน (site.css) และหลังบ้าน (admin.css)
   สีหลักดึงจากตัวแปรธีมของระบบเดิม: --primary / --secondary / --accent
   ============================================================ */

:root {
  --lms-radius:    14px;
  --lms-radius-lg: 20px;
  --lms-radius-xl: 28px;
  --lms-line: #e5e9f0;
  --lms-soft: #f8fafc;
  --lms-text-muted: #64748b;
  --lms-ok: #16a34a;
  --lms-warn: #d97706;
  --lms-danger: #dc2626;
  --lms-sh-1: 0 1px 2px rgba(15, 23, 42, .04), 0 1px 3px rgba(15, 23, 42, .06);
  --lms-sh-2: 0 8px 24px -10px rgba(15, 23, 42, .18);
  --lms-sh-3: 0 20px 48px -20px rgba(15, 23, 42, .28);
}
[data-theme="dark"] {
  --lms-line: #334155;
  --lms-soft: #1e293b;
  --lms-text-muted: #94a3b8;
}

/* ---------- แถบความก้าวหน้า ---------- */
.lms-bar {
  display: block;
  height: 8px;
  background: var(--lms-line);
  border-radius: 99px;
  overflow: hidden;
  margin: 6px 0;
}
.lms-bar > span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--primary, #2563eb), var(--accent, #06b6d4));
  border-radius: 99px;
  transition: width .4s ease;
}
.lms-bar.bar-warn > span   { background: var(--lms-warn); }
.lms-bar.bar-danger > span { background: var(--lms-danger); }

/* ============================================================
   หน้าบ้าน — แคตตาล็อกรายวิชา
   ============================================================ */
.lms-hero {
  background: linear-gradient(135deg, var(--secondary, #1e293b), var(--primary, #2563eb));
  color: #fff;
  border-radius: var(--lms-radius-xl);
  padding: 46px 28px;
  margin-bottom: 30px;
  text-align: center;
  box-shadow: var(--lms-sh-3);
}
.lms-hero h1 { margin: 0 0 8px; font-size: clamp(24px, 3.2vw, 32px); font-weight: 500; color: #fff; }
.lms-hero p  { margin: 0 0 22px; color: rgba(255, 255, 255, .9); }

.lms-search {
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: 620px;
  margin: 0 auto;
  background: #fff;
  border-radius: 99px;
  padding: 7px 7px 7px 20px;
  box-shadow: 0 14px 34px -18px rgba(0, 0, 0, .6);
}
.lms-search i { color: var(--lms-text-muted); }
.lms-search input {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: 0;
  font: inherit;
  font-size: 15.5px;
  padding: 10px 4px;
  background: transparent;
  color: #0f172a;
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
  margin: 18px 0;
}
.course-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--lms-line);
  border-radius: var(--lms-radius-lg);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
[data-theme="dark"] .course-card { background: var(--lms-soft); }
.course-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--lms-sh-2);
  border-color: color-mix(in srgb, var(--primary, #2563eb) 28%, var(--lms-line));
}

.course-thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--lms-soft);
  display: block;
}
.course-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.course-thumb-blank {
  width: 100%; height: 100%;
  display: grid; place-items: center;
  font-size: 42px;
  color: #cbd5e1;
  background: linear-gradient(135deg, #f1f5f9, #e2e8f0);
}
.course-code {
  position: absolute; top: 10px; left: 10px;
  background: rgba(15, 23, 42, .78);
  color: #fff; font-size: 12px;
  padding: 3px 10px; border-radius: 99px;
}
.course-flag {
  position: absolute; top: 10px; right: 10px;
  background: var(--lms-ok); color: #fff;
  font-size: 12px; padding: 3px 10px; border-radius: 99px;
}
.course-flag.done { background: #b45309; }

.course-body { padding: 14px 16px 18px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.course-body h3 { margin: 0; font-size: 17px; font-weight: 500; line-height: 1.45; }
.course-body h3 a { text-decoration: none; color: inherit; }
.course-summary { margin: 0; font-size: 13.5px; color: var(--lms-text-muted); line-height: 1.6; }
.course-meta {
  display: flex; flex-wrap: wrap; gap: 12px;
  font-size: 12.5px; color: var(--lms-text-muted);
  margin-top: auto;
}
.course-teacher { font-size: 13px; color: var(--lms-text-muted); }
.enrolled-card .btn { margin-top: 6px; }

/* ============================================================
   หน้ารายวิชา
   ============================================================ */
.course-hero {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 28px;
  margin: 18px 0 30px;
}
.course-hero h1 { margin: 10px 0 12px; font-size: 30px; font-weight: 600; line-height: 1.35; }
.course-hero-sum { color: var(--lms-text-muted); line-height: 1.75; margin: 0 0 16px; }
.course-hero-meta {
  display: flex; flex-wrap: wrap; gap: 16px;
  font-size: 14px; color: var(--lms-text-muted);
  margin-bottom: 18px;
}
.course-stats {
  display: flex; flex-wrap: wrap; gap: 26px;
  padding: 16px 20px;
  background: var(--lms-soft);
  border-radius: var(--lms-radius-lg);
}
.course-stats > div { display: flex; flex-direction: column; }
.course-stats strong { font-size: 22px; font-weight: 600; color: var(--primary, #2563eb); }
.course-stats span { font-size: 12.5px; color: var(--lms-text-muted); }

.course-cover { border-radius: var(--lms-radius-lg); overflow: hidden; aspect-ratio: 16/9; background: var(--lms-soft); }
.course-cover img { width: 100%; height: 100%; object-fit: cover; display: block; }

.enroll-box {
  margin-top: 16px;
  padding: 20px;
  border: 1px solid var(--lms-line);
  border-radius: var(--lms-radius-lg);
  background: #fff;
  box-shadow: var(--lms-sh-1);
}
[data-theme="dark"] .enroll-box { background: var(--lms-soft); }
.enroll-box.enrolled {
  border-color: color-mix(in srgb, var(--primary, #2563eb) 45%, var(--lms-line));
  box-shadow: var(--lms-sh-2);
}
.enroll-progress { display: flex; justify-content: space-between; font-size: 14px; margin-bottom: 4px; }
.enroll-progress strong { color: var(--primary, #2563eb); }
.enroll-box .btn { margin-top: 12px; }
.teacher-box { display: flex; flex-direction: column; gap: 8px; font-size: 14px; }
.teacher-box strong { margin-bottom: 4px; }

.pill {
  display: inline-block;
  background: var(--lms-soft);
  color: var(--lms-text-muted);
  border: 1px solid var(--lms-line);
  font-size: 12.5px;
  padding: 3px 12px;
  border-radius: 99px;
}
.pill-ok   { background: #dcfce7; color: #166534; border-color: #bbf7d0; }
.pill-warn { background: #fef3c7; color: #92400e; border-color: #fde68a; }

.course-body-layout { display: grid; grid-template-columns: 1fr 300px; gap: 26px; align-items: start; }
.card-block {
  background: #fff;
  border: 1px solid var(--lms-line);
  border-radius: var(--lms-radius-lg);
  padding: 26px 28px;
  margin-bottom: 22px;
  box-shadow: var(--lms-sh-1);
}
[data-theme="dark"] .card-block { background: var(--lms-soft); }
.card-block h2 { margin: 0 0 14px; font-size: 20px; font-weight: 600; }
.card-block h3 { margin: 0 0 12px; font-size: 16px; font-weight: 500; }

.check-list, .plain-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.check-list i { color: var(--lms-ok); margin-right: 6px; }
.plain-list li { padding-left: 14px; position: relative; font-size: 14px; line-height: 1.7; color: var(--lms-text-muted); }
.plain-list li::before { content: "•"; position: absolute; left: 0; color: var(--primary, #2563eb); }

/* ---------- สารบัญบทเรียน ---------- */
.syllabus-unit { margin-bottom: 22px; }
.syllabus-unit h3 { display: flex; align-items: center; gap: 8px; font-size: 16px; margin-bottom: 6px; }
.syllabus-unit h3 small { font-weight: 400; margin-left: auto; }
.syllabus-list { list-style: none; padding: 0; margin: 10px 0 0; }
.syllabus-list li {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--lms-line);
  border-radius: 10px;
  margin-bottom: 8px;
}
.syllabus-list li.done { background: #f0fdf4; border-color: #bbf7d0; }
[data-theme="dark"] .syllabus-list li.done { background: rgba(22, 163, 74, .12); }
.syl-icon { color: var(--primary, #2563eb); padding-top: 2px; }
.syllabus-list li.done .syl-icon { color: var(--lms-ok); }
.syl-main { flex: 1; display: flex; flex-direction: column; gap: 3px; }
.syl-main a { text-decoration: none; font-weight: 500; }
.syl-main small { font-size: 12.5px; }
.syl-extra { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.syl-side { display: flex; flex-direction: column; align-items: flex-end; gap: 4px; }

/* ---------- รายการกิจกรรม (แบบทดสอบ/ใบงาน) ---------- */
.task-list { display: flex; flex-direction: column; gap: 10px; }
.task-item {
  display: flex; align-items: center; gap: 14px;
  padding: 15px 18px;
  border: 1px solid var(--lms-line);
  border-radius: 12px;
  text-decoration: none;
  color: inherit;
  background: #fff;
  transition: border-color .15s ease, background .15s ease, transform .15s ease;
}
[data-theme="dark"] .task-item { background: transparent; }
.task-item:hover {
  border-color: color-mix(in srgb, var(--primary, #2563eb) 45%, var(--lms-line));
  background: var(--lms-soft);
  transform: translateX(2px);
}
.task-item > i { font-size: 18px; color: var(--primary, #2563eb); width: 22px; text-align: center; }
.task-main { flex: 1; display: flex; flex-direction: column; gap: 2px; }
.task-main small { font-size: 12.5px; }
.task-item.is-late { border-color: #fecaca; }

.rubric-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.rubric-table td, .rubric-table th { padding: 7px 6px; border-bottom: 1px solid var(--lms-line); text-align: left; }
.rubric-table th { font-weight: 500; color: var(--lms-text-muted); }

/* ============================================================
   หน้าเรียน
   ============================================================ */
.learn-layout { display: grid; grid-template-columns: 300px 1fr; gap: 26px; align-items: start; }

.learn-side {
  position: sticky;
  /* เผื่อความสูงของแถบผู้ดูแล + เฮดเดอร์ ไม่ให้สารบัญมุดไปอยู่ข้างใต้ */
  top: calc(var(--adminbar-h, 0px) + var(--header-h, 63px) + 18px);
  border: 1px solid var(--lms-line);
  border-radius: var(--lms-radius-lg);
  background: #fff;
  overflow: hidden;
  max-height: calc(100vh - var(--adminbar-h, 0px) - var(--header-h, 63px) - 36px);
  display: flex;
  flex-direction: column;
}
[data-theme="dark"] .learn-side { background: var(--lms-soft); }
.learn-side-head { padding: 16px; border-bottom: 1px solid var(--lms-line); }
.learn-side-head a { text-decoration: none; font-weight: 500; font-size: 14px; }
.learn-progress { margin-top: 10px; }
.learn-progress small { font-size: 12px; color: var(--lms-text-muted); }

.learn-toc { list-style: none; margin: 0; padding: 8px; overflow-y: auto; }
.learn-toc .toc-unit {
  font-size: 12px; font-weight: 500;
  color: var(--lms-text-muted);
  padding: 12px 10px 6px;
  text-transform: none;
}
.learn-toc li a {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 10px;
  border-radius: 8px;
  text-decoration: none;
  color: inherit;
  font-size: 13.5px;
  line-height: 1.5;
}
.learn-toc li a:hover { background: var(--lms-soft); }
.learn-toc li.current > a { background: var(--primary, #2563eb); color: #fff; }
.learn-toc li.current .toc-no { background: rgba(255,255,255,.25); color: #fff; }
.toc-no {
  flex: 0 0 24px; height: 24px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: var(--lms-soft);
  font-size: 12px;
}
.learn-toc li.done .toc-no { background: var(--lms-ok); color: #fff; }
.toc-title { flex: 1; }
.learn-toc li a small { color: inherit; opacity: .65; font-size: 11.5px; }

.learn-toc-toggle { display: none; }

.learn-head { margin-bottom: 20px; }
.learn-head h1 { margin: 10px 0 8px; font-size: 28px; font-weight: 600; line-height: 1.4; }
.learn-summary { color: var(--lms-text-muted); line-height: 1.8; margin: 0; }

.media-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #0f172a;
  border-radius: var(--lms-radius-lg);
  overflow: hidden;
  margin: 20px 0;
}
.media-frame iframe, .media-frame video { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.media-frame.ratio-canva { aspect-ratio: 16 / 10; }

.learn-content { line-height: 1.9; }
.learn-content img { max-width: 100%; height: auto; border-radius: 10px; }
.learn-content table { width: 100%; border-collapse: collapse; margin: 16px 0; }
.learn-content th, .learn-content td { border: 1px solid var(--lms-line); padding: 8px 10px; }
.learn-content th { background: var(--lms-soft); font-weight: 500; }

.learn-block { margin: 30px 0; }
.learn-block h2 { font-size: 19px; font-weight: 600; margin: 0 0 14px; display: flex; align-items: center; gap: 8px; }
.learn-block h2 i { color: var(--primary, #2563eb); }

.learn-foot {
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
  padding: 22px 0 10px;
  margin-top: 26px;
  border-top: 1px solid var(--lms-line);
  flex-wrap: wrap;
}
.learn-complete { margin: 0 auto; }

/* ============================================================
   แบบทดสอบ
   ============================================================ */
.quiz-intro { max-width: 720px; margin: 20px auto; text-align: center; }
.quiz-intro h1 { margin: 12px 0; font-size: 28px; font-weight: 600; }
.quiz-intro-desc { color: var(--lms-text-muted); line-height: 1.8; }
.quiz-facts {
  list-style: none; padding: 20px; margin: 22px 0;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  background: var(--lms-soft);
  border-radius: var(--lms-radius-lg);
  text-align: left;
  font-size: 14px;
}
.quiz-facts i { color: var(--primary, #2563eb); width: 20px; }

.quiz-bar {
  position: sticky;
  top: calc(var(--adminbar-h, 0px) + var(--header-h, 63px));
  z-index: 20;
  display: flex; align-items: center; gap: 18px;
  padding: 12px 18px;
  background: #fff;
  border: 1px solid var(--lms-line);
  border-radius: var(--lms-radius-lg);
  margin-bottom: 18px;
  box-shadow: 0 4px 14px rgba(15, 23, 42, .06);
}
[data-theme="dark"] .quiz-bar { background: var(--lms-soft); }
.quiz-bar > div:first-child { display: flex; flex-direction: column; }
.quiz-timer {
  margin-left: auto;
  font-variant-numeric: tabular-nums;
  font-size: 18px; font-weight: 600;
  color: var(--primary, #2563eb);
}
.quiz-timer.urgent { color: var(--lms-danger); animation: quizPulse 1s infinite; }
@keyframes quizPulse { 50% { opacity: .45; } }
.quiz-answered { font-size: 14px; color: var(--lms-text-muted); }

.quiz-q {
  background: #fff;
  border: 1px solid var(--lms-line);
  border-radius: var(--lms-radius-lg);
  padding: 20px 22px;
  margin-bottom: 14px;
}
[data-theme="dark"] .quiz-q { background: var(--lms-soft); }
.quiz-q-head { display: flex; gap: 14px; margin-bottom: 14px; }
.quiz-no {
  flex: 0 0 30px; height: 30px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: var(--primary, #2563eb);
  color: #fff; font-size: 14px; font-weight: 500;
}
.quiz-q-text { font-size: 16px; line-height: 1.7; margin-bottom: 4px; }
.quiz-img, .qr-img, .qb-img { max-width: 100%; border-radius: 10px; margin: 10px 0; }

.quiz-options { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.quiz-options label {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--lms-line);
  border-radius: 10px;
  cursor: pointer;
  line-height: 1.6;
  transition: border-color .12s ease, background .12s ease;
}
.quiz-options label:hover { border-color: var(--primary, #2563eb); background: var(--lms-soft); }
.quiz-options input { margin-top: 4px; flex: 0 0 auto; }
.quiz-options input:checked + span { font-weight: 500; }
.quiz-options li:has(input:checked) label { border-color: var(--primary, #2563eb); background: var(--lms-soft); }

.quiz-short {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--lms-line);
  border-radius: 10px;
  font: inherit;
}
.quiz-submit { text-align: center; padding: 24px 0 40px; }

/* ---------- ผลการทำ ---------- */
.quiz-result {
  text-align: center;
  padding: 40px 24px;
  border-radius: var(--lms-radius-lg);
  margin: 20px 0 28px;
  border: 2px solid var(--lms-line);
}
.quiz-result.passed { background: #f0fdf4; border-color: #86efac; }
.quiz-result.failed { background: #fff7ed; border-color: #fed7aa; }
[data-theme="dark"] .quiz-result.passed { background: rgba(22,163,74,.12); }
[data-theme="dark"] .quiz-result.failed { background: rgba(217,119,6,.12); }
.quiz-result > i { font-size: 52px; margin-bottom: 12px; }
.quiz-result.passed > i { color: var(--lms-ok); }
.quiz-result.failed > i { color: var(--lms-warn); }
.quiz-result h1 { margin: 6px 0; font-size: 26px; font-weight: 600; }
.quiz-score { font-size: 40px; font-weight: 600; margin: 10px 0 0; }
.quiz-score span { font-size: 18px; font-weight: 400; color: var(--lms-text-muted); }
.quiz-percent { font-size: 16px; margin: 4px 0 12px; }
.quiz-result-actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-top: 18px; }

.quiz-review h2 { font-size: 20px; font-weight: 600; margin: 26px 0 14px; }
.quiz-review-item {
  border: 1px solid var(--lms-line);
  border-left: 4px solid var(--lms-line);
  border-radius: 10px;
  padding: 18px 20px;
  margin-bottom: 12px;
  background: #fff;
}
[data-theme="dark"] .quiz-review-item { background: var(--lms-soft); }
.quiz-review-item.correct { border-left-color: var(--lms-ok); }
.quiz-review-item.wrong   { border-left-color: var(--lms-danger); }
.qr-head { display: flex; gap: 14px; margin-bottom: 12px; }
.qr-no {
  flex: 0 0 28px; height: 28px;
  display: grid; place-items: center;
  border-radius: 50%; background: var(--lms-soft); font-size: 13px;
}
.qr-q { font-size: 15.5px; line-height: 1.7; margin-bottom: 6px; }
.qr-options { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 6px; }
.qr-options li {
  padding: 9px 12px;
  border: 1px solid var(--lms-line);
  border-radius: 8px;
  font-size: 14px;
  display: flex; align-items: center; gap: 10px;
}
.qr-options li.is-correct { background: #f0fdf4; border-color: #86efac; }
.qr-options li.is-wrong   { background: #fef2f2; border-color: #fecaca; }
[data-theme="dark"] .qr-options li.is-correct { background: rgba(22,163,74,.12); }
[data-theme="dark"] .qr-options li.is-wrong   { background: rgba(220,38,38,.12); }
.qr-options li.is-correct i { color: var(--lms-ok); }
.qr-options li.is-wrong i   { color: var(--lms-danger); }
.qr-expl, .qb-expl {
  margin: 12px 0 0;
  padding: 10px 14px;
  background: #fffbeb;
  border-left: 3px solid #fbbf24;
  border-radius: 6px;
  font-size: 13.5px;
  line-height: 1.7;
}
[data-theme="dark"] .qr-expl, [data-theme="dark"] .qb-expl { background: rgba(251,191,36,.12); }

/* ============================================================
   ใบงาน
   ============================================================ */
.assign-layout { display: grid; grid-template-columns: 1fr 300px; gap: 26px; align-items: start; }
.assign-head h1 { margin: 10px 0; font-size: 26px; font-weight: 600; }
.assign-meta { display: flex; flex-wrap: wrap; gap: 18px; font-size: 14px; color: var(--lms-text-muted); }
.assign-meta .is-late { color: var(--lms-danger); }
.assign-form .field { margin-bottom: 16px; }

.submit-status {
  display: flex; align-items: center; gap: 14px;
  padding: 16px 18px;
  border-radius: 10px;
  margin-bottom: 16px;
  background: var(--lms-soft);
}
.submit-status > i { font-size: 24px; }
.submit-status.graded   { background: #f0fdf4; }
.submit-status.graded > i { color: var(--lms-ok); }
.submit-status.returned { background: #fff7ed; }
.submit-status.returned > i { color: var(--lms-warn); }
.submit-status.submitted > i { color: var(--primary, #2563eb); }
.submit-status div { display: flex; flex-direction: column; gap: 3px; }
[data-theme="dark"] .submit-status.graded { background: rgba(22,163,74,.12); }
[data-theme="dark"] .submit-status.returned { background: rgba(217,119,6,.12); }

.feedback-box {
  padding: 14px 18px;
  border-left: 3px solid var(--primary, #2563eb);
  background: var(--lms-soft);
  border-radius: 6px;
  margin-bottom: 16px;
}
.feedback-box p { margin: 6px 0 0; line-height: 1.75; }
.submitted-text {
  padding: 16px 18px;
  background: var(--lms-soft);
  border-radius: 10px;
  line-height: 1.8;
  margin-bottom: 14px;
  white-space: pre-wrap;
}

/* ============================================================
   ห้องเรียนของฉัน
   ============================================================ */
.my-head {
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  flex-wrap: wrap;
  margin: 16px 0 26px;
}
.my-head h1 { margin: 0 0 6px; font-size: 26px; font-weight: 600; }

/* ============================================================
   เกียรติบัตร
   ============================================================ */
.cert-actions {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  margin: 16px 0 22px;
}
.cert-actions code { font-size: 12px; background: var(--lms-soft); padding: 3px 8px; border-radius: 6px; }

.cert-sheet {
  aspect-ratio: 297 / 210;
  background: #fffdf7;
  border: 2px solid #c9a227;
  border-radius: 6px;
  padding: 14px;
  box-shadow: 0 12px 40px rgba(15, 23, 42, .14);
  margin-bottom: 40px;
}
.cert-inner {
  height: 100%;
  border: 1px solid #e0c76a;
  border-radius: 3px;
  padding: 4% 8%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #1f2937;
  position: relative;
}
.cert-seal { font-size: 40px; color: #c9a227; margin-bottom: 6px; }
.cert-org { font-size: 15px; letter-spacing: .04em; margin: 0 0 4px; color: #6b7280; }
.cert-title { font-size: 17px; font-weight: 400; margin: 0 0 10px; color: #4b5563; }
.cert-name {
  font-size: 34px; font-weight: 600; margin: 4px 0 14px;
  color: #7c2d12;
  border-bottom: 1px dashed #d6b45f;
  padding: 0 40px 8px;
}
.cert-text { font-size: 16px; line-height: 1.9; margin: 0 0 8px; }
.cert-text strong { font-size: 19px; }
.cert-score { font-size: 14px; color: #4b5563; margin: 0 0 6px; }
.cert-date { font-size: 14px; color: #4b5563; margin: 4px 0 22px; }
.cert-signs { display: flex; gap: 60px; justify-content: center; }
.cert-sign { display: flex; flex-direction: column; align-items: center; gap: 2px; font-size: 13px; }
.cert-line { display: block; width: 170px; border-bottom: 1px dotted #9ca3af; margin-bottom: 6px; }
.cert-sign small { color: #6b7280; }
.cert-no { position: absolute; bottom: 10px; right: 16px; font-size: 11px; color: #9ca3af; margin: 0; }

@media print {
  .no-print, .site-header, .site-footer, .adminbar, .alert { display: none !important; }
  body { background: #fff; }
  .container, .page { max-width: none; padding: 0; margin: 0; }
  .cert-sheet { box-shadow: none; margin: 0; border-radius: 0; }
  @page { size: A4 landscape; margin: 8mm; }
}

/* ============================================================
   หลังบ้าน — ตัวสร้างข้อสอบ / ตรวจงาน / สมุดคะแนน
   เปิดใช้ด้วย <body class="lms-admin"> ในหน้า LMS เท่านั้น
   ============================================================ */

/* .card ของหลังบ้านเดิมไม่มี padding (ออกแบบไว้ใส่ตารางเต็มใบ)
   หน้า LMS ใส่เนื้อหาอิสระ จึงต้องเติมระยะขอบให้ — ยกเว้นใบที่ครอบตาราง */
.lms-admin .card { padding: 22px 24px; }
.lms-admin .card.table-wrap { padding: 0; }
.lms-admin .card.table-wrap > h3 { padding: 20px 22px 0; margin: 0 0 12px; }
.lms-admin .card + .card,
.lms-admin .card + .qb-layout,
.lms-admin .qb-layout + .card,
.lms-admin .lms-stats + .card { margin-top: 16px; }
.lms-admin .card > :first-child { margin-top: 0; }
.lms-admin .card > :last-child { margin-bottom: 0; }

.btn-sm { padding: 5px 10px !important; font-size: 12.5px !important; }

/* ---------- แถบเลือกรายวิชา ---------- */
.lms-coursebar { margin-bottom: 16px; }
.lms-coursebar-form {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.lms-coursebar-form > label {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14px;
  color: var(--lms-text-muted);
  white-space: nowrap;
}
.lms-coursebar-form > label i { color: var(--primary, #2563eb); }
/* select เปล่า ๆ ไม่ได้อยู่ใน .form-row จึงต้องจัดสไตล์เอง ให้เหมือนช่องอื่นในหลังบ้าน */
.lms-coursebar-form select {
  min-width: 280px;
  padding: 9px 34px 9px 13px;
  border: 1px solid var(--lms-line);
  border-radius: 9px;
  font-family: inherit;
  font-size: 14px;
  background: #fff;
  color: inherit;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%2364748b'%3E%3Cpath d='M4.5 6.5 8 10l3.5-3.5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 16px;
}
.lms-coursebar-form select:hover { border-color: color-mix(in srgb, var(--primary, #2563eb) 45%, var(--lms-line)); }
.lms-coursebar-form select:focus {
  outline: 2px solid color-mix(in srgb, var(--primary, #2563eb) 30%, transparent);
  border-color: var(--primary, #2563eb);
}
.lms-coursebar-links {
  display: flex; gap: 6px; flex-wrap: wrap;
  margin-left: auto;
  padding-left: 10px;
  border-left: 1px solid var(--lms-line);
}
html[data-theme="dark"] .lms-coursebar-form select { background-color: #0f172a; }

.empty-state {
  text-align: center;
  padding: 52px 20px;
  color: var(--lms-text-muted);
  background: var(--lms-soft);
  border: 1px dashed var(--lms-line);
  border-radius: var(--lms-radius-xl);
}
.empty-state i { font-size: 40px; opacity: .32; display: block; margin-bottom: 14px; }
.empty-state p { margin: 0 0 16px; }
/* อยู่ในตารางหรือในการ์ดอยู่แล้ว ไม่ต้องมีกรอบซ้อนกรอบอีกชั้น */
td > .empty-state,
.lms-admin .card > .empty-state {
  background: transparent;
  border: 0;
  padding: 34px 12px;
}


.qb-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 18px; flex-wrap: wrap; }
.qb-head h2 { font-size: 20px; font-weight: 500; }
.qb-head-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.qb-layout { display: grid; grid-template-columns: minmax(0, 1fr) 360px; gap: 16px; align-items: start; }
/* เผื่อความสูงของแถบบนหลังบ้าน (sticky) ไม่ให้ฟอร์มมุดไปอยู่ข้างใต้ */
.qb-form { position: sticky; top: 74px; }
.lms-admin .card > h3:first-child {
  font-size: 15px;
  font-weight: 500;
  margin: 0 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--lms-line);
}

.qb-item {
  border: 1px solid var(--lms-line);
  border-radius: 10px;
  padding: 14px 16px;
  margin-bottom: 10px;
}
.qb-item.editing { border-color: var(--primary, #2563eb); background: var(--lms-soft); }
.qb-item-head { display: flex; gap: 12px; align-items: flex-start; }
.qb-no {
  flex: 0 0 28px; height: 28px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: var(--primary, #2563eb);
  color: #fff; font-size: 13px;
}
.qb-item-title { flex: 1; min-width: 0; line-height: 1.7; }
.qb-item-title > strong { font-weight: 500; }
.qb-meta { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; margin-top: 6px; font-size: 12.5px; }
.qb-meta a { max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
/* ปุ่มจัดการรายการ — ใช้ปุ่มไอคอนแบบเดียวกับตารางของหลังบ้าน ไม่ให้ดูหนักเกินไป */
.qb-item-actions { display: flex; gap: 5px; align-items: center; flex-shrink: 0; }
.qb-item-actions form { display: inline-flex; gap: 5px; margin: 0; }
.qb-opts-list { margin: 10px 0 0; padding-left: 22px; font-size: 14px; line-height: 1.9; }
.qb-opts-list li.correct { color: var(--lms-ok); font-weight: 500; }
.qb-opts { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; margin-top: 10px; font-size: 13px; }
.qb-opt-row { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.qb-opt-row input[type="text"] { flex: 1; }
.qb-inline { display: inline-flex; align-items: center; gap: 6px; margin-right: 18px; }

/* ปุ่มข้อความที่สื่อถึงการลบ แต่ไม่หนักเท่าปุ่มแดงเต็มใบ */
.btn.danger-text { color: #b91c1c; }
.btn.danger-text:hover { background: #fee2e2; border-color: #fecaca; }

/* ---------- ตรวจงาน ---------- */
.grade-card { margin-bottom: 16px; }
.grade-head {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 16px;
  padding-bottom: 12px; margin-bottom: 14px;
  border-bottom: 1px solid var(--lms-line);
  flex-wrap: wrap;
}
.grade-who { display: flex; align-items: center; gap: 12px; }
.grade-status { display: flex; gap: 6px; flex-wrap: wrap; }
.avatar { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; flex: 0 0 40px; }
.avatar-letter {
  display: grid; place-items: center;
  background: var(--primary, #2563eb);
  color: #fff; font-weight: 500;
}
.grade-body { display: grid; grid-template-columns: 1fr 340px; gap: 20px; align-items: start; }
.grade-text {
  padding: 14px 16px;
  background: var(--lms-soft);
  border-radius: 8px;
  line-height: 1.8;
  white-space: pre-wrap;
  margin-bottom: 12px;
}
.grade-form { border-left: 1px solid var(--lms-line); padding-left: 20px; }
.grade-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.row-dropped { opacity: .55; }

/* ---------- สมุดคะแนน ---------- */
.lms-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin-bottom: 18px; }
.lms-stats .stat { display: flex; flex-direction: column; gap: 4px; text-align: center; padding: 18px; }
.stat-num { font-size: 26px; font-weight: 600; color: var(--primary, #2563eb); }
.stat-label { font-size: 13px; color: var(--lms-text-muted); }

.gradebook { font-size: 13px; }
.gradebook th, .gradebook td { white-space: nowrap; }
.gradebook .col-quiz, .gradebook .col-asg { min-width: 110px; }
.gradebook th small { display: block; font-weight: 400; font-size: 11px; color: var(--lms-text-muted); }
.gradebook td.num { text-align: center; }
.gradebook td.num small { display: block; font-size: 11px; }
.gradebook .sticky-col { position: sticky; left: 0; background: #fff; z-index: 2; }
[data-theme="dark"] .gradebook .sticky-col { background: var(--lms-soft); }
.score-pass { color: var(--lms-ok); font-weight: 600; }
.score-fail { color: var(--lms-warn); font-weight: 600; }
/* admin.css ไม่ได้ครอบ input[type=search] ไว้ — เติมให้หน้าตาเหมือนช่องกรอกอื่น */
.lms-admin .form-row input[type=search] {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--lms-line);
  border-radius: 9px;
  font-family: inherit;
  font-size: 14px;
  background: #fff;
  color: inherit;
}
.lms-admin .form-row input[type=search]:focus {
  outline: 2px solid color-mix(in srgb, var(--primary, #2563eb) 30%, transparent);
  border-color: var(--primary, #2563eb);
}
.lms-admin .form-row select[multiple] { padding: 8px; line-height: 1.9; }
.lms-filter-input { width: 100%; margin-bottom: 8px; }

/* ============================================================
   จอเล็ก
   ============================================================ */
@media (max-width: 980px) {
  .course-hero,
  .course-body-layout,
  .assign-layout,
  .grade-body,
  .qb-layout { grid-template-columns: 1fr; }
  .grade-form { border-left: 0; padding-left: 0; border-top: 1px solid var(--lms-line); padding-top: 16px; }
  .qb-form { position: static; }

  .learn-layout { grid-template-columns: 1fr; }
  .learn-toc-toggle {
    display: inline-flex; align-items: center; gap: 8px;
    margin-bottom: 14px;
    padding: 9px 16px;
    border: 1px solid var(--lms-line);
    border-radius: 99px;
    background: #fff;
    font: inherit;
    cursor: pointer;
  }
  .learn-side { display: none; position: static; max-height: none; }
  .learn-side.open { display: flex; margin-bottom: 18px; }
  .lms-coursebar-links { margin-left: 0; }
}

@media (max-width: 640px) {
  .lms-hero { padding: 26px 18px; }
  .lms-hero h1 { font-size: 24px; }
  .lms-search { flex-wrap: wrap; border-radius: 14px; padding: 10px; }
  .course-stats { gap: 18px; }
  .cert-sheet { aspect-ratio: auto; }
  .cert-name { font-size: 24px; padding: 0 10px 8px; }
  .cert-signs { flex-direction: column; gap: 22px; }
  .learn-foot { flex-direction: column; align-items: stretch; }
  .learn-complete { margin: 0; }
}