/*
  Shared design system for public-facing pages AND the student panel.
  Self-contained - does not touch assets/css/style.css, which admin
  (and any not-yet-migrated student pages) still relies on.
*/

:root{
  --accent: #6C5DD3;
  --accent-dark: #5847C4;
  --accent-soft: #EEF0FF;
  --bg: #F6F6FB;
  --surface: #FFFFFF;
  --border: #ECEDF3;
  --ink: #14142B;
  --muted: #6E7191;
  --muted-2: #8A8CA5;

  --chip-blue-bg: #E7ECFF;   --chip-blue-text: #4C5FD5;
  --chip-orange-bg: #FDECE1; --chip-orange-text: #E0793C;
  --chip-green-bg: #E4F7EC;  --chip-green-text: #2FA360;
  --chip-pink-bg: #FCE7F3;   --chip-pink-text: #D6579B;

  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-card: 0 12px 30px -18px rgba(20, 20, 43, 0.14);
  --shadow-pop: 0 20px 44px -20px rgba(20, 20, 43, 0.22);
  --font-display: "Space Grotesk", "Inter", -apple-system, sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --nav-bg: rgba(246, 246, 251, 0.9);
  --footer-bg: #14142B;
}

:root[data-theme="dark"]{
  --accent: #8272E8;
  --accent-dark: #9686F5;
  --accent-soft: #26213F;
  --bg: #131320;
  --surface: #1B1B2C;
  --border: #302F45;
  --ink: #F0F0F7;
  --muted: #A3A2BE;
  --muted-2: #7C7B98;

  --chip-blue-bg: #202B4D;   --chip-blue-text: #93A9FF;
  --chip-orange-bg: #3A2A1E; --chip-orange-text: #F0A868;
  --chip-green-bg: #1C3629;  --chip-green-text: #63DA92;
  --chip-pink-bg: #3A2032;   --chip-pink-text: #F094C6;

  --shadow-card: 0 12px 30px -18px rgba(0, 0, 0, 0.5);
  --shadow-pop: 0 20px 44px -20px rgba(0, 0, 0, 0.6);
  --nav-bg: rgba(19, 19, 32, 0.85);
  --footer-bg: #0B0B14;
}
:root[data-theme="dark"] .mu-course-img{ background: var(--border); }

*{ box-sizing: border-box; }
.mu-body{
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
.mu-body a{ text-decoration: none; }
.mu-body :focus-visible{ outline: 2px solid var(--accent); outline-offset: 3px; }

.mu-container{ max-width: 1160px; margin: 0 auto; padding: 0 24px; }

/* ================= Marketing nav / footer ================= */
.mu-nav{
  position: sticky; top: 0; z-index: 40;
  background: var(--nav-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.mu-nav-row{ display: flex; align-items: center; justify-content: space-between; padding: 16px 0; gap: 24px; }
.mu-mark{ display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 700; font-size: 1.1rem; color: var(--ink); flex-shrink: 0; }
.mu-seal{
  width: 36px; height: 36px; border-radius: var(--radius-sm);
  background: #fff; box-shadow: 0 0 0 1px var(--border) inset; flex-shrink: 0;
  object-fit: contain; display: block;
}
.mu-nav-links{ display: flex; align-items: center; gap: 30px; list-style: none; margin: 0; padding: 0; font-size: 0.94rem; font-weight: 500; }
.mu-nav-links a{ color: var(--muted); transition: color 0.15s ease; }
.mu-nav-links a:hover{ color: var(--accent); }
.mu-nav-actions{ display: flex; align-items: center; gap: 12px; flex-shrink: 0; }

.mu-btn{
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 0.8rem 1.4rem; border-radius: var(--radius-sm);
  font-family: var(--font-body); font-weight: 600; font-size: 0.92rem;
  border: 1.5px solid transparent; cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease, transform 0.12s ease;
}
.mu-btn:hover{ transform: translateY(-1px); }
.mu-btn-solid{ background: var(--accent); color: #fff; }
.mu-btn-solid:hover{ background: var(--accent-dark); }
.mu-btn-outline{ border-color: var(--border); color: var(--ink); background: var(--surface); }
.mu-btn-outline:hover{ border-color: var(--accent); color: var(--accent); }
.mu-btn-block{ width: 100%; }
.mu-btn-lg{ padding: 0.95rem 1.8rem; font-size: 0.98rem; }

.mu-footer{ background: var(--footer-bg); color: #A6A8C4; padding: 48px 0 26px; }
.mu-footer-top{ display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: 32px; padding-bottom: 32px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.mu-footer-mark{ display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 700; color: #fff; font-size: 1.05rem; }
.mu-footer-blurb{ max-width: 32ch; font-size: 0.88rem; margin-top: 12px; }
.mu-footer-links{ display: flex; gap: 56px; flex-wrap: wrap; }
.mu-footer-col h4{ font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; color: #fff; margin: 0 0 14px; font-weight: 600; }
.mu-footer-col ul{ list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.mu-footer-col a{ font-size: 0.9rem; transition: color 0.15s ease; }
.mu-footer-col a:hover{ color: #fff; }
.mu-footer-bottom{ padding-top: 22px; font-size: 0.82rem; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }

.mu-back-to-top{
  position: fixed; right: 22px; bottom: 22px; width: 42px; height: 42px; border-radius: 50%;
  background: var(--accent); color: #fff; display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden; transition: opacity 0.2s ease, transform 0.2s ease; z-index: 50; border: none;
}
.mu-back-to-top.mu-visible{ opacity: 1; visibility: visible; }
.mu-back-to-top:hover{ transform: translateY(-3px); }

/* ================= Marketing hero ================= */
.mu-hero{ padding: 44px 0 0; }
.mu-hero-banner{
  position: relative;
  background: linear-gradient(135deg, var(--accent), #8B7CF0);
  border-radius: var(--radius-lg);
  padding: 56px 48px;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}
.mu-eyebrow{
  display: inline-flex; align-items: center; gap: 8px; font-size: 0.82rem; font-weight: 600;
  color: #fff; background: rgba(255,255,255,0.16); border: 1px solid rgba(255,255,255,0.3);
  padding: 6px 14px; border-radius: 999px; margin-bottom: 20px;
}
.mu-hero h1{ font-family: var(--font-display); font-weight: 700; font-size: clamp(1.9rem, 3.4vw, 2.7rem); line-height: 1.18; color: #fff; margin: 0 0 16px; }
.mu-hero-lead{ font-size: 1.02rem; color: rgba(255,255,255,0.85); max-width: 42ch; margin: 0 0 28px; }
.mu-hero-actions{ display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.mu-hero-actions .mu-btn-solid{ background: #fff; color: var(--accent); }
.mu-hero-actions .mu-btn-solid:hover{ background: #f2f0ff; }
.mu-link-arrow{ display: inline-flex; align-items: center; gap: 8px; font-weight: 600; font-size: 0.94rem; color: #fff; padding: 0.8rem 0.4rem; transition: gap 0.15s ease; }
.mu-link-arrow:hover{ gap: 12px; }

.mu-hero-photo{ position: relative; aspect-ratio: 4 / 5; }
.mu-hero-photo img{
  width: 100%; height: 100%; object-fit: cover; object-position: 50% 15%; display: block;
  border-radius: var(--radius-lg); box-shadow: var(--shadow-pop); border: 4px solid rgba(255,255,255,0.28);
}
.mu-deco-chip{
  position: absolute; width: 52px; height: 52px; border-radius: 14px; background: rgba(255,255,255,0.94);
  display: flex; align-items: center; justify-content: center; box-shadow: var(--shadow-pop);
  animation: mu-float 5s ease-in-out infinite; z-index: 2;
}
.mu-deco-chip svg{ color: var(--accent); }
.mu-deco-chip:nth-of-type(1){ top: -14px; right: -14px; animation-delay: 0s; }
.mu-deco-chip:nth-of-type(2){ bottom: -14px; left: -14px; animation-delay: 1.2s; }
@keyframes mu-float{ 0%,100%{ transform: translateY(0); } 50%{ transform: translateY(-10px); } }
@media (prefers-reduced-motion: reduce){ .mu-deco-chip{ animation: none; } }

/* ================= How it works ================= */
.mu-steps{ padding: 64px 0; }
.mu-steps-grid{ display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.mu-step{ background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 28px 26px; }
.mu-step-num{ font-family: var(--font-display); font-weight: 700; font-size: 0.85rem; color: var(--accent); background: var(--accent-soft); width: 34px; height: 34px; border-radius: 10px; display: flex; align-items: center; justify-content: center; margin-bottom: 18px; }
.mu-step h3{ font-family: var(--font-display); font-weight: 700; font-size: 1.05rem; margin: 0 0 8px; }
.mu-step p{ font-size: 0.9rem; color: var(--muted); margin: 0; }

/* ================= Subject pills ================= */
.mu-subjects{ padding: 8px 0 8px; }
.mu-subjects-row{ display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.mu-subject-pill{ font-size: 0.84rem; font-weight: 500; color: var(--muted); background: var(--surface); border: 1px solid var(--border); padding: 7px 16px; border-radius: 999px; }

/* ================= Courses grid (marketing + dashboard) ================= */
.mu-section{ padding: 56px 0; }
.mu-section-head{ display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 28px; gap: 16px; flex-wrap: wrap; }
.mu-section-head h2{ font-family: var(--font-display); font-weight: 700; font-size: 1.6rem; margin: 0 0 4px; color: var(--ink); }
.mu-section-note{ font-size: 0.9rem; color: var(--muted); }
.mu-see-all{ font-size: 0.88rem; font-weight: 600; color: var(--accent); }

.mu-courses{ display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.mu-course{
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md);
  overflow: hidden; display: flex; flex-direction: column; transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.mu-course:hover{ transform: translateY(-4px); box-shadow: var(--shadow-card); }
.mu-course-media{ position: relative; aspect-ratio: 16/10; overflow: hidden; }
.mu-course-img{ width: 100%; height: 100%; object-fit: cover; display: block; background: var(--bg); transition: transform 0.35s ease; }
.mu-course:hover .mu-course-img{ transform: scale(1.05); }
.mu-chip{ display: inline-flex; font-size: 0.72rem; font-weight: 700; padding: 4px 11px; border-radius: 999px; background: var(--chip-blue-bg); color: var(--chip-blue-text); width: fit-content; }
.mu-course-cat{ position: absolute; top: 12px; left: 12px; z-index: 1; }
.mu-chip-orange{ background: var(--chip-orange-bg); color: var(--chip-orange-text); }
.mu-chip-green{ background: var(--chip-green-bg); color: var(--chip-green-text); }
.mu-chip-pink{ background: var(--chip-pink-bg); color: var(--chip-pink-text); }
.mu-course-body{ padding: 16px 18px 18px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.mu-course-title{ font-family: var(--font-display); font-weight: 700; font-size: 1rem; margin: 0; line-height: 1.3; color: var(--ink); }
.mu-course-foot{ margin-top: auto; display: flex; align-items: center; justify-content: space-between; padding-top: 12px; border-top: 1px solid var(--border); font-size: 0.88rem; }
.mu-course-price{ font-weight: 700; color: var(--ink); }
.mu-course-cta{ font-weight: 600; color: var(--accent); display: inline-flex; align-items: center; gap: 5px; }
.mu-course-empty{ color: var(--muted); font-size: 0.95rem; }
.mu-course-instructor{ display: flex; align-items: center; gap: 8px; font-size: 0.82rem; color: var(--muted); }
.mu-course-avatar{ width: 24px; height: 24px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 0.7rem; flex-shrink: 0; }

/* ================= Auth pages ================= */
.mu-auth{ min-height: calc(100vh - 76px); display: flex; align-items: center; justify-content: center; padding: 56px 24px; }
.mu-auth-card{ width: 100%; max-width: 420px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow-card); padding: 38px 34px 32px; }
.mu-auth-card .mu-seal{ width: 52px; height: 52px; margin-bottom: 18px; }
.mu-auth-card h1{ font-family: var(--font-display); font-weight: 700; font-size: 1.55rem; margin: 0 0 6px; color: var(--ink); }
.mu-auth-sub{ color: var(--muted); font-size: 0.92rem; margin: 0 0 26px; }
.mu-field{ margin-bottom: 16px; }
.mu-field label{ display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 6px; color: var(--ink); }
.mu-field input, .mu-field select{
  width: 100%; padding: 0.75rem 0.9rem; border: 1.5px solid var(--border); border-radius: 10px;
  background: var(--surface); font-family: var(--font-body); font-size: 0.95rem; color: var(--ink);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.mu-field input:focus, .mu-field select:focus{ outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.mu-field-password{ position: relative; }
.mu-field-password input{ padding-right: 44px; }
.mu-field-password-toggle{
  position: absolute; top: 50%; right: 10px; transform: translateY(-50%);
  width: 30px; height: 30px; display: flex; align-items: center; justify-content: center;
  background: none; border: none; color: var(--muted); cursor: pointer; border-radius: 8px;
}
.mu-field-password-toggle:hover{ color: var(--ink); background: var(--bg); }
.mu-field-phone{ display: flex; }
.mu-field-phone .mu-prefix{ display: flex; align-items: center; padding: 0 12px; border: 1.5px solid var(--border); border-right: none; border-radius: 10px 0 0 10px; background: var(--bg); font-size: 0.88rem; color: var(--muted); }
.mu-field-phone input{ border-radius: 0 10px 10px 0; }
.mu-alert{ border-radius: 10px; padding: 12px 14px; font-size: 0.88rem; margin-bottom: 20px; }
.mu-alert-error{ background: rgba(220, 53, 69, 0.08); color: #b3202f; border: 1px solid rgba(220, 53, 69, 0.22); }
.mu-auth-foot{ text-align: center; margin-top: 18px; font-size: 0.88rem; color: var(--muted); }
.mu-auth-foot a{ color: var(--accent); font-weight: 600; }

/* =====================================================================
   Student panel (dashboard) - sidebar + topbar shell
   ===================================================================== */
.mu-app{ display: flex; min-height: 100vh; background: var(--bg); }

.mu-side{
  width: 264px; flex-shrink: 0; background: var(--surface); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; padding: 26px 20px;
  position: sticky; top: 0; height: 100vh; overflow-y: auto;
}
.mu-side-logo{ display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 700; font-size: 1.05rem; color: var(--ink); margin-bottom: 30px; padding: 0 6px; }
.mu-side-label{ font-size: 0.72rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted-2); margin: 0 0 10px; padding: 0 6px; }
.mu-side-nav{ list-style: none; margin: 0 0 24px; padding: 0; display: flex; flex-direction: column; gap: 3px; }
.mu-side-link{
  display: flex; align-items: center; gap: 12px; padding: 10px 12px; border-radius: var(--radius-sm);
  color: var(--muted); font-size: 0.92rem; font-weight: 500; transition: background 0.15s ease, color 0.15s ease;
}
.mu-side-link svg{ flex-shrink: 0; }
.mu-side-link:hover{ background: var(--bg); color: var(--ink); }
.mu-side-link.mu-active{ background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.mu-side-spacer{ flex: 1; }

.mu-content{ flex: 1; min-width: 0; }
.mu-topbar{
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  padding: 20px 32px; background: var(--bg);
}
.mu-search{
  display: flex; align-items: center; gap: 10px; background: var(--surface); border: 1px solid var(--border);
  border-radius: 999px; padding: 10px 18px; max-width: 360px; width: 100%; color: var(--muted-2);
}
.mu-search input{ border: none; outline: none; background: transparent; font-family: var(--font-body); font-size: 0.9rem; width: 100%; color: var(--ink); }
.mu-topbar-actions{ display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.mu-icon-btn{
  width: 40px; height: 40px; border-radius: 50%; background: var(--surface); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center; color: var(--muted); position: relative; flex-shrink: 0;
}
.mu-icon-btn .mu-dot{ position: absolute; top: 8px; right: 9px; width: 7px; height: 7px; border-radius: 50%; background: #E0793C; border: 1.5px solid var(--surface); }
.mu-profile{ display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.mu-avatar{ width: 38px; height: 38px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 0.85rem; flex-shrink: 0; }
.mu-profile-name{ font-size: 0.88rem; font-weight: 600; color: var(--ink); white-space: nowrap; }

.mu-main{ padding: 0 32px 40px; }

/* ---- Promo banner (dashboard) ---- */
.mu-banner{
  position: relative; background: linear-gradient(135deg, var(--accent), #8B7CF0);
  border-radius: var(--radius-lg); padding: 40px 40px; overflow: hidden;
  display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 24px; align-items: center; margin-bottom: 22px;
}
.mu-banner h2{ font-family: var(--font-display); font-weight: 700; font-size: 1.7rem; color: #fff; margin: 0 0 10px; }
.mu-banner p{ color: rgba(255,255,255,0.85); font-size: 0.95rem; margin: 0 0 22px; max-width: 40ch; }
.mu-banner-actions{ display: flex; gap: 14px; flex-wrap: wrap; }
.mu-banner-actions .mu-btn-solid{ background: #fff; color: var(--accent); }
.mu-banner-actions .mu-btn-outline{ background: transparent; border-color: rgba(255,255,255,0.4); color: #fff; }
.mu-banner-actions .mu-btn-outline:hover{ background: rgba(255,255,255,0.12); }
.mu-banner-deco{ position: relative; height: 160px; }

/* ---- Stat tiles ---- */
.mu-stats{ display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-bottom: 30px; }
.mu-stat{ background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 20px 20px 22px; }
.mu-stat-icon{ width: 40px; height: 40px; border-radius: 12px; display: flex; align-items: center; justify-content: center; margin-bottom: 14px; }
.mu-stat-icon-blue{ background: var(--chip-blue-bg); color: var(--chip-blue-text); }
.mu-stat-icon-orange{ background: var(--chip-orange-bg); color: var(--chip-orange-text); }
.mu-stat-icon-green{ background: var(--chip-green-bg); color: var(--chip-green-text); }
.mu-stat-icon-pink{ background: var(--chip-pink-bg); color: var(--chip-pink-text); }
.mu-stat-label{ font-size: 0.86rem; color: var(--muted); margin: 0 0 8px; }
.mu-stat-value{ font-family: var(--font-display); font-weight: 700; font-size: 1.7rem; color: var(--ink); }

/* ---- Continue learning ---- */
.mu-continue{
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: 18px; display: flex; align-items: center; gap: 22px; margin-bottom: 34px;
}
.mu-continue-thumb{ width: 130px; height: 88px; border-radius: var(--radius-sm); object-fit: cover; flex-shrink: 0; background: var(--bg); }
.mu-continue-body{ flex: 1; min-width: 0; }
.mu-continue-title{ font-family: var(--font-display); font-weight: 700; font-size: 1.02rem; margin: 6px 0 4px; color: var(--ink); }
.mu-continue-sub{ font-size: 0.86rem; color: var(--muted); margin: 0 0 12px; }
.mu-continue-sub b{ color: var(--ink); }
.mu-progress-track{ height: 6px; border-radius: 999px; background: var(--border); overflow: hidden; max-width: 320px; }
.mu-progress-fill{ height: 100%; background: var(--accent); border-radius: 999px; }
.mu-continue-empty{ color: var(--muted); font-size: 0.92rem; }

/* ---- Topic progress path (mycourses) ---- */
.mu-path{ display: flex; align-items: center; gap: 4px; margin: 10px 0; }
.mu-path-node{ width: 11px; height: 11px; border-radius: 50%; background: var(--border); flex-shrink: 0; }
.mu-path-node.mu-done{ background: var(--accent); }
.mu-path-node.mu-current{ background: #fff; border: 2.5px solid var(--accent); width: 13px; height: 13px; }
.mu-path-line{ flex: 1; height: 2px; background: var(--border); min-width: 10px; }
.mu-path-line.mu-done{ background: var(--accent); }

/* ---- Two-column profile layout ---- */
.mu-profile-grid{ display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: start; }
@media (max-width: 900px){ .mu-profile-grid{ grid-template-columns: 1fr; } }

/* ---- Certificate ---- */
.mu-cert{ display: flex; justify-content: center; padding: 10px 0 30px; }
.mu-cert-border{
  width: 100%; max-width: 780px; background: var(--surface);
  border: 3px solid var(--accent); border-radius: var(--radius-lg);
  padding: 56px 48px; text-align: center; position: relative;
}
.mu-cert-border::before{
  content: ""; position: absolute; inset: 10px; border: 1px solid var(--border); border-radius: 12px; pointer-events: none;
}
.mu-cert-seal{
  width: 56px; height: 56px; border-radius: 50%; background: var(--accent); color: #fff;
  display: flex; align-items: center; justify-content: center; margin: 0 auto 16px;
  font-family: var(--font-display); font-weight: 700; font-size: 1.3rem;
}
.mu-cert-eyebrow{ color: var(--muted); font-size: 0.9rem; margin: 0 0 6px; }
.mu-cert-title{ font-family: var(--font-display); font-weight: 700; font-size: 2.4rem; letter-spacing: 0.06em; color: var(--ink); margin: 0 0 22px; }
.mu-cert-lead{ color: var(--muted); margin: 0 0 10px; }
.mu-cert-name{ font-family: var(--font-display); font-weight: 700; font-size: 1.6rem; color: var(--accent); margin: 0 0 18px; }
.mu-cert-body{ font-size: 1.05rem; color: var(--ink); max-width: 46ch; margin: 0 auto 34px; }
.mu-cert-footer{ display: flex; align-items: center; justify-content: space-between; padding-top: 20px; border-top: 1px dashed var(--border); text-align: left; }
.mu-cert-code{ font-family: var(--font-display); font-weight: 600; margin: 0 0 4px; }
.mu-cert-date{ color: var(--muted); font-size: 0.9rem; margin: 0; }
.mu-cert-qr{ width: 90px; height: 90px; }

@media print{
  .mu-side, .mu-topbar, .mu-cert-hide-print, .mu-back-to-top{ display: none !important; }
  .mu-main{ padding: 0 !important; }
  .mu-cert-border{ border-color: #333; }
}

/* ---- Simple content cards (results table etc.) ---- */
.mu-card{ background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 22px 24px; }
.mu-table{ width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.mu-table th{ text-align: left; color: var(--muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.03em; padding: 10px 12px; border-bottom: 1px solid var(--border); }
.mu-table td{ padding: 14px 12px; border-bottom: 1px solid var(--border); color: var(--ink); }
.mu-table tr:last-child td{ border-bottom: none; }
.mu-status{ display: inline-flex; font-size: 0.76rem; font-weight: 700; padding: 4px 10px; border-radius: 999px; }
.mu-status-done{ background: var(--chip-green-bg); color: var(--chip-green-text); }
.mu-status-progress{ background: var(--chip-orange-bg); color: var(--chip-orange-text); }
.mu-status-todo{ background: var(--border); color: var(--muted); }

/* ---- Test answer selection (radio/checkbox cards) ----
   Scoped under .mu-body (every mu-* page's <body> class) so these rules always
   out-specificity the legacy same-named .test-answer/.custom-radio/.custom-checkbox
   rules in assets/css/style.css (still relied on, as-is, by the old admin/student
   question-preview pages, which never carry .mu-body) - without this prefix the two
   stylesheets fight property-by-property and produce a broken hybrid layout. */
.mu-body .test-answer{
  position: relative; display: flex; align-items: center; gap: 12px;
  padding: 13px 16px; margin-bottom: 10px; margin-top: 0; border: 1.5px solid var(--border);
  border-radius: var(--radius-sm); background: var(--surface); cursor: pointer;
  font-size: 0.95rem; transition: border-color 0.15s ease, background 0.15s ease;
}
.mu-body .test-answer:hover{ border-color: var(--accent); background: var(--surface); }
.mu-body .test-answer input{ position: absolute; opacity: 0; width: 0; height: 0; left: auto; top: auto; }
.mu-body .custom-radio, .mu-body .custom-checkbox{
  position: relative; flex-shrink: 0; width: 20px; height: 20px; left: auto; top: auto;
  border: 1.5px solid var(--muted-2); background: var(--surface);
  transition: border-color 0.15s ease, background 0.15s ease;
}
.mu-body .custom-radio{ border-radius: 50%; }
.mu-body .custom-checkbox{ border-radius: 6px; }
.mu-body .custom-radio::after{
  content: ""; position: absolute; top: 50%; left: 50%; width: 8px; height: 8px;
  border-radius: 50%; background: #fff; transform: translate(-50%, -50%) scale(0);
  transition: transform 0.15s ease; display: block;
}
.mu-body .custom-checkbox::after{
  content: ""; position: absolute; top: 3px; left: 6px; width: 5px; height: 10px;
  border: solid #fff; border-width: 0 2px 2px 0; transform: rotate(45deg) scale(0);
  transition: transform 0.15s ease; display: block;
}
.mu-body .test-answer input:checked ~ .custom-radio,
.mu-body .test-answer input:checked ~ .custom-checkbox{ border-color: var(--accent); background: var(--accent); }
.mu-body .test-answer input:checked ~ .custom-radio::after{ transform: translate(-50%, -50%) scale(1); }
.mu-body .test-answer input:checked ~ .custom-checkbox::after{ transform: rotate(45deg) scale(1); }
.mu-body .test-answer:has(input:checked){ border-color: var(--accent); background: var(--accent-soft); }

/* ---- One-question-at-a-time test layout ---- */
.mu-test-layout{ display: grid; grid-template-columns: 1fr 200px; gap: 20px; align-items: start; }
.mu-test-q{ display: none; }
.mu-test-q.mu-active{ display: block; }
.mu-test-nav-buttons{ display: flex; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.mu-test-sidebar{
  position: sticky; top: 20px; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-md); padding: 16px;
}
.mu-test-qnums{ display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.mu-test-qnum{
  width: 100%; aspect-ratio: 1; border-radius: 8px; border: 1.5px solid var(--border);
  background: var(--surface); display: flex; align-items: center; justify-content: center;
  font-weight: 600; font-size: 0.85rem; color: var(--muted); cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease;
}
.mu-test-qnum:hover{ border-color: var(--accent); color: var(--accent); }
.mu-test-qnum.mu-answered{ background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.mu-test-qnum.mu-current{ outline: 2px solid var(--accent); outline-offset: 2px; }
@media (max-width: 900px){
  .mu-test-layout{ grid-template-columns: 1fr; }
  .mu-test-sidebar{ position: static; order: -1; }
  .mu-test-qnums{ grid-template-columns: repeat(8, 1fr); }
}

/* ---- About page: founder/instructor card ---- */
.mu-founder-grid{ display: grid; grid-template-columns: 0.8fr 1.2fr; align-items: stretch; }
.mu-founder-photo{ min-height: 220px; }
.mu-founder-photo img{ width: 100%; height: 100%; object-fit: cover; object-position: 50% 15%; display: block; }
@media (max-width: 620px){
  .mu-founder-grid{ grid-template-columns: 1fr; }
  .mu-founder-photo{ min-height: 200px; }
}

/* ================= Responsive ================= */
@media (max-width: 1080px){
  .mu-stats{ grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px){
  .mu-hero-banner{ grid-template-columns: 1fr; }
  .mu-hero-photo{ aspect-ratio: 16 / 9; max-width: 420px; margin: 0 auto; }
  .mu-steps-grid{ grid-template-columns: 1fr; }
  .mu-courses{ grid-template-columns: repeat(2, 1fr); }
  .mu-nav-links{ display: none; }
  .mu-side{ position: fixed; left: -280px; z-index: 60; box-shadow: var(--shadow-pop); transition: left 0.2s ease; }
  .mu-side.mu-open{ left: 0; }
  .mu-banner{ grid-template-columns: 1fr; }
  .mu-banner-deco{ display: none; }
  .mu-continue{ flex-direction: column; align-items: stretch; }
  .mu-continue-thumb{ width: 100%; height: 140px; }
}
@media (max-width: 620px){
  .mu-courses{ grid-template-columns: 1fr; }
  .mu-section{ padding: 40px 0; }
  .mu-footer-top{ flex-direction: column; }
  .mu-stats{ grid-template-columns: 1fr 1fr; }
  .mu-main, .mu-topbar{ padding-left: 18px; padding-right: 18px; }
  .mu-search{ display: none; }
}