/* Public course pages — /course/ hub + /course/<slug>/ modules (and /es/curso/).
   Self-contained: these pages do NOT load guide.css. Tokens, nav, footer and
   card language are copied from the landing page (public/index.html) so the
   course reads as the same product. */

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

:root {
  --bg:      #06090e;
  --sidebar: #090d14;
  --surface: #0e141d;
  --border:  #1c2531;
  --accent:  #00d4ff;
  --accent-2:#7a9bff;
  --violet:  #a78bfa;
  --buy:     #00e676;
  --sell:    #ff3d57;
  --text:    #cbd7e4;
  --muted:   #55677d;
  --mono:    'Roboto Mono', monospace;
  --sans:    'Inter', -apple-system, 'Segoe UI', sans-serif;
  --display: 'Space Grotesk', 'Inter', sans-serif;
  --sub-color: #8ba0b8;
  --card-bg: linear-gradient(180deg, rgba(255,255,255,0.035), rgba(255,255,255,0.012));
  --card-border: rgba(255,255,255,0.08);
  --ring: rgba(0,212,255,0.35);
  /* aliases so the lesson bodies authored for the dashboard render unchanged */
  --accent-rgb: 0,212,255;
  --muted-text: #8ba0b8;
  --ui-meta: 11px;
  --ui-label: 13px;
}

html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-weight: 450;
  font-size: 15px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
::selection { background: rgba(0,212,255,0.25); color: #fff; }
img { max-width: 100%; }

/* ── NAV ───────────────────────────────────────────────────────────── */
nav.site-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: 64px;
  background: rgba(6,9,14,0.72);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 32px; gap: 16px;
}
.nav-logo {
  font-family: var(--display);
  font-size: 19px; font-weight: 700; letter-spacing: 2.5px; color: #fff;
  text-decoration: none; white-space: nowrap;
}
.nav-logo span { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 2px; }
.nav-link {
  font-family: var(--sans);
  font-size: 11px; font-weight: 600; letter-spacing: 0.08em; color: #b7c5d6;
  text-decoration: none; padding: 8px 10px; border-radius: 8px;
  transition: color .15s ease, background .15s ease; white-space: nowrap;
}
.nav-link:hover { color: #fff; background: rgba(255,255,255,0.06); }
.nav-link.active { color: var(--accent); }
.nav-cta-group { display: flex; align-items: center; gap: 10px; }
.btn-ghost {
  font-family: var(--sans); font-size: 12px; font-weight: 650; letter-spacing: 0.07em;
  padding: 9px 18px; border: 1px solid rgba(255,255,255,0.14); border-radius: 10px;
  background: rgba(255,255,255,0.03); color: #eaf2fa; cursor: pointer;
  transition: border-color .15s, background .15s; text-decoration: none; display: inline-block;
}
.btn-ghost:hover { border-color: var(--ring); background: rgba(0,212,255,0.06); }
.btn-accent {
  font-family: var(--sans); font-size: 12px; font-weight: 700; letter-spacing: 0.07em;
  padding: 9px 18px; border: none; border-radius: 10px;
  background: linear-gradient(135deg, #22ddff, #00a9e8);
  color: #001018; cursor: pointer;
  box-shadow: 0 4px 18px rgba(0,212,255,0.28), inset 0 1px 0 rgba(255,255,255,0.35);
  transition: transform .15s, box-shadow .15s; text-decoration: none; display: inline-block;
}
.btn-accent:hover { transform: translateY(-1px); box-shadow: 0 8px 26px rgba(0,212,255,0.4), inset 0 1px 0 rgba(255,255,255,0.35); }
.nav-hamburger {
  display: none; flex-direction: column; justify-content: center; align-items: center; gap: 5px;
  width: 42px; height: 42px;
  background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.12); border-radius: 10px;
  cursor: pointer; padding: 0; flex-shrink: 0;
}
.nav-mobile-ctas { display: none; }
.nav-hamburger span { display: block; width: 18px; height: 2px; background: #cbd7e4; border-radius: 2px; }

/* ── SHARED SECTION HEADERS ────────────────────────────────────────── */
.section-eyebrow {
  font-family: var(--mono);
  font-size: 11px; font-weight: 600; letter-spacing: 0.24em; color: var(--accent);
  margin-bottom: 18px;
}
.section-title {
  font-family: var(--display);
  font-size: clamp(28px, 3.6vw, 46px); font-weight: 700; color: #f4f9ff; line-height: 1.1;
  letter-spacing: -0.022em; margin-bottom: 18px;
}
.section-title span {
  background: linear-gradient(100deg, #22ddff, #eaf6ff 94%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.section-sub {
  font-size: 15px; font-weight: 450; color: var(--sub-color); line-height: 1.75;
}

/* ── MODULE PAGE SHELL ─────────────────────────────────────────────── */
main { padding-top: 64px; }
.cm-shell { width: min(1180px, calc(100vw - 40px)); margin: 0 auto; }

.cm-crumbs {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  padding-top: 34px;
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.12em;
  text-transform: uppercase; color: #5f7185;
}
.cm-crumbs a { color: #8ba0b8; text-decoration: none; transition: color .15s; }
.cm-crumbs a:hover { color: var(--accent); }
.cm-crumbs span.sep { color: #33414f; }

.cm-hero { padding: 30px 0 34px; }
.cm-hero h1 {
  font-family: var(--display);
  font-size: clamp(30px, 4vw, 48px); font-weight: 700; color: #f4f9ff;
  line-height: 1.1; letter-spacing: -0.022em; max-width: 860px;
}
.cm-hero-sub {
  margin-top: 16px; max-width: 720px;
  font-size: 15px; font-weight: 450; color: var(--sub-color); line-height: 1.75;
}
.cm-hero-meta { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 22px; }
.cm-chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 14px; border-radius: 999px;
  border: 1px solid var(--card-border); background: rgba(255,255,255,0.03);
  font-family: var(--mono); font-size: 10px; font-weight: 600; letter-spacing: 0.12em;
  text-transform: uppercase; color: #8ba0b8;
}
.cm-chip.free { border-color: rgba(0,230,118,0.28); background: rgba(0,230,118,0.06); color: #6ee7a5; }
.cm-chip i { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

/* ── MODULE STRIP (all 8 modules, numbered, top of every page) ─────── */
.cm-strip {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px;
  padding: 4px 0 8px;
}
.cm-strip-item {
  display: flex; align-items: center; gap: 12px;
  padding: 13px 15px; min-width: 0;
  background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 14px;
  text-decoration: none;
  transition: border-color .2s, transform .2s, box-shadow .2s;
}
.cm-strip-item:hover { border-color: rgba(0,212,255,0.32); transform: translateY(-3px); box-shadow: 0 14px 34px rgba(0,0,0,0.38); }
.cm-strip-num {
  flex-shrink: 0; width: 30px; height: 30px; border-radius: 9px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, rgba(0,212,255,0.12), rgba(122,120,255,0.10));
  border: 1px solid rgba(0,212,255,0.22); color: var(--accent);
  font-family: var(--mono); font-size: 12px; font-weight: 700;
}
.cm-strip-name {
  min-width: 0; color: #cfdcea; font-size: 12.5px; font-weight: 550; line-height: 1.35;
}
.cm-strip-item.current {
  border-color: rgba(0,212,255,0.45);
  background: linear-gradient(180deg, rgba(0,212,255,0.10), rgba(0,212,255,0.02));
  box-shadow: 0 0 0 1px rgba(0,212,255,0.10) inset;
}
.cm-strip-item.current .cm-strip-num { background: linear-gradient(135deg, #22ddff, #00a9e8); border-color: transparent; color: #001018; }
.cm-strip-item.current .cm-strip-name { color: #fff; font-weight: 650; }
.cm-strip-item.done .cm-strip-num { border-color: rgba(0,230,118,0.4); color: var(--buy); }

/* ── LAYOUT ────────────────────────────────────────────────────────── */
.cm-layout {
  display: grid; grid-template-columns: minmax(0, 1fr) 300px;
  gap: 44px; align-items: start; padding: 34px 0 90px;
}
.cm-main { max-width: 830px; min-width: 0; }

/* ── SIDEBAR ───────────────────────────────────────────────────────── */
.cm-side { position: sticky; top: 84px; display: grid; gap: 16px; }
.cm-side-card {
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: 18px; overflow: hidden;
}
.cm-side-hdr {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 15px 18px; border-bottom: 1px solid rgba(255,255,255,0.06);
  font-family: var(--mono); font-size: 9.5px; font-weight: 700; letter-spacing: 0.2em;
  text-transform: uppercase; color: #fff;
}
.cm-side-hdr em { font-style: normal; color: var(--accent); letter-spacing: 0.12em; }
.cm-side-list { list-style: none; padding: 6px; }
.cm-side-list a {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 11px; border-radius: 10px;
  color: #a9bbcd; font-size: 12.5px; font-weight: 480; line-height: 1.4;
  text-decoration: none; transition: background .15s, color .15s;
}
.cm-side-list a:hover { background: rgba(0,212,255,0.07); color: #fff; }
.cm-side-list a.current { background: rgba(0,212,255,0.08); color: #fff; }
.cm-side-num {
  flex-shrink: 0; min-width: 18px;
  font-family: var(--mono); font-size: 10px; font-weight: 700; letter-spacing: 0.06em; color: #5f7185;
}
.cm-side-list a.current .cm-side-num { color: var(--accent); }
.cm-side-list a.done { color: var(--buy); }
.cm-side-list a.done .cm-side-num { color: var(--buy); }

/* ── LESSONS ───────────────────────────────────────────────────────── */
.cm-lesson {
  padding: 30px 0 34px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  scroll-margin-top: 84px;
}
.cm-lesson:first-of-type { padding-top: 4px; }
.cm-lesson-hdr { display: flex; align-items: center; gap: 14px; margin-bottom: 2px; }
.cm-lesson-num {
  flex-shrink: 0; width: 40px; height: 40px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, rgba(0,212,255,0.12), rgba(122,120,255,0.10));
  border: 1px solid rgba(0,212,255,0.22); color: var(--accent);
  font-family: var(--mono); font-size: 13px; font-weight: 700;
}
.cm-lesson-hdr h2 {
  font-family: var(--display); font-size: 23px; font-weight: 700; color: #fff;
  letter-spacing: -0.015em; line-height: 1.25;
}
.cm-mark {
  margin-top: 20px;
  font-family: var(--mono); font-size: 10.5px; font-weight: 700; letter-spacing: 0.14em;
  padding: 10px 20px; border-radius: 10px; cursor: pointer;
  border: 1px solid rgba(0,230,118,0.32); background: rgba(0,230,118,0.07); color: #6ee7a5;
  transition: border-color .15s, background .15s, color .15s;
}
.cm-mark:hover { border-color: rgba(0,230,118,0.6); color: var(--buy); }
.cm-mark.marked { border-color: rgba(0,230,118,0.6); background: rgba(0,230,118,0.16); color: var(--buy); }

/* ── LESSON BODY (markup comes from the dashboard course) ──────────── */
.course-topic-body p { color: var(--text); font-size: 15px; font-weight: 450; line-height: 1.8; margin: 16px 0 0; }
.course-topic-body ul { margin: 14px 0 0; display: grid; gap: 8px; list-style: none; }
.course-topic-body ul li {
  display: flex; align-items: flex-start; gap: 10px;
  color: #dbe7f3; font-size: 14px; font-weight: 450; line-height: 1.65;
}
.course-topic-body ul li::before { content: '—'; color: var(--accent); flex-shrink: 0; }
.course-topic-body strong { color: #fff; font-weight: 650; }
.course-topic-body .topic-note {
  margin-top: 16px; padding: 16px 18px;
  border: 1px solid rgba(0,212,255,0.20); border-left: 3px solid var(--accent);
  border-radius: 14px; background: rgba(0,212,255,0.05);
  font-size: 14px; font-weight: 450; color: #dbe7f3; line-height: 1.7;
}
.course-topic-body .topic-note strong { color: var(--accent); }
.course-topic-body .topic-example {
  margin-top: 16px; padding: 15px 18px;
  border: 1px solid var(--card-border); border-radius: 14px; background: var(--card-bg);
  font-size: 14px; color: #dbe7f3; line-height: 1.7;
}
.course-topic-body .course-img-placeholder {
  margin: 18px 0 4px;
  border: 1px solid var(--card-border); border-radius: 16px;
  overflow: hidden; background: #080b11;
}
.course-topic-body .rules-grid { display: grid; gap: 10px; margin-top: 16px; }
.course-topic-body .rule-item {
  padding: 14px 16px; border: 1px solid var(--card-border); border-radius: 14px;
  background: var(--card-bg); font-size: 13.5px; font-weight: 450; color: #dbe7f3; line-height: 1.6;
  transition: border-color .2s;
}
.course-topic-body .rule-item:hover { border-color: rgba(0,212,255,0.28); }
.course-topic-body .rule-item strong {
  display: block; margin-bottom: 4px;
  font-family: var(--mono); font-size: 11.5px; font-weight: 700; letter-spacing: 0.06em; color: #fff;
}
.course-topic-body .backtest-cta {
  margin-top: 18px; padding: 18px 20px;
  border: 1px solid rgba(0,212,255,0.25); border-radius: 16px;
  background: linear-gradient(180deg, rgba(0,212,255,0.08), rgba(0,212,255,0.02));
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
}
.course-topic-body .backtest-cta span { font-size: 14px; color: #eaf2fa; line-height: 1.6; }
.course-topic-body .course-cta-link {
  display: inline-block; white-space: nowrap; text-decoration: none;
  font-family: var(--sans); font-size: 12px; font-weight: 700; letter-spacing: 0.07em;
  padding: 11px 20px; border-radius: 10px;
  background: linear-gradient(135deg, #22ddff, #00a9e8); color: #001018;
  box-shadow: 0 4px 18px rgba(0,212,255,0.28), inset 0 1px 0 rgba(255,255,255,0.35);
  transition: transform .15s, box-shadow .15s;
}
.course-topic-body .course-cta-link:hover { transform: translateY(-1px); box-shadow: 0 8px 26px rgba(0,212,255,0.4), inset 0 1px 0 rgba(255,255,255,0.35); }
.course-topic-body .course-steps-list { display: grid; gap: 12px; margin-top: 18px; }
.course-topic-body .course-step-item {
  display: flex; gap: 16px; padding: 18px;
  border: 1px solid var(--card-border); border-radius: 16px; background: var(--card-bg);
  align-items: flex-start; transition: border-color .2s;
}
.course-topic-body .course-step-item:hover { border-color: rgba(0,212,255,0.28); }
.course-topic-body .course-step-num {
  flex-shrink: 0; width: 32px; height: 32px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, rgba(0,212,255,0.12), rgba(122,120,255,0.10));
  border: 1px solid rgba(0,212,255,0.22); color: var(--accent);
  font-family: var(--mono); font-size: 12px; font-weight: 700;
}
.course-topic-body .course-step-body { min-width: 0; font-size: 14px; font-weight: 450; color: #dbe7f3; line-height: 1.7; }
.course-topic-body .course-step-body strong {
  display: block; margin-bottom: 6px;
  font-family: var(--display); font-size: 15px; font-weight: 650; color: #fff;
}
.course-topic-body table { max-width: 100%; }

/* ── SECTION TEST ──────────────────────────────────────────────────── */
.cm-test {
  margin-top: 44px;
  border: 1px solid var(--card-border); border-radius: 20px;
  background: var(--card-bg); overflow: hidden; scroll-margin-top: 84px;
}
.cm-test-hdr {
  padding: 24px 26px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  background: linear-gradient(180deg, rgba(0,212,255,0.07), transparent);
}
.cm-test-hdr small {
  font-family: var(--mono); font-size: 10px; font-weight: 700; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--accent);
}
.cm-test-hdr h2 {
  margin: 9px 0 0; font-family: var(--display); font-size: 22px; font-weight: 700;
  color: #fff; letter-spacing: -0.015em; line-height: 1.25;
}
.cm-test-hdr p { margin: 9px 0 0; font-size: 13.5px; color: var(--sub-color); line-height: 1.65; }
.cm-quiz { list-style: none; }
.cm-q { padding: 22px 26px; border-bottom: 1px solid rgba(255,255,255,0.05); }
.cm-q:last-child { border-bottom: none; }
.cm-q-text {
  display: flex; gap: 12px; align-items: baseline;
  color: #fff; font-size: 14.5px; font-weight: 600; line-height: 1.55; margin-bottom: 14px;
}
.cm-q-text b { flex-shrink: 0; font-family: var(--mono); font-size: 11px; font-weight: 700; color: var(--accent); }
.cm-q-opts { display: grid; gap: 8px; }
.cm-q-opt {
  text-align: left; font-family: var(--sans);
  font-size: 13.5px; font-weight: 450; line-height: 1.5; color: #cfdcea;
  padding: 13px 16px; border: 1px solid var(--card-border); border-radius: 12px;
  background: rgba(255,255,255,0.02); cursor: pointer;
  transition: border-color .15s, background .15s, color .15s;
}
.cm-q-opt:hover:not(:disabled) { border-color: rgba(0,212,255,0.35); background: rgba(0,212,255,0.05); color: #fff; }
.cm-q-opt.correct { border-color: rgba(0,230,118,0.55); background: rgba(0,230,118,0.09); color: #6ee7a5; }
.cm-q-opt.wrong { border-color: rgba(255,61,87,0.5); background: rgba(255,61,87,0.08); color: #ff8b9b; }
.cm-q-opt:disabled { cursor: default; }
.cm-test-foot {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 14px;
  padding: 20px 26px; border-top: 1px solid rgba(255,255,255,0.06);
  background: rgba(255,255,255,0.02);
}
.cm-score { font-family: var(--mono); font-size: 12.5px; font-weight: 600; letter-spacing: 0.06em; color: #cfdcea; }
.cm-score b { font-family: var(--display); font-size: 22px; color: var(--accent); }
.cm-score-msg { display: block; margin-top: 5px; font-family: var(--sans); font-size: 13px; font-weight: 450; letter-spacing: 0; color: var(--sub-color); }
.cm-retry {
  font-family: var(--sans); font-size: 12px; font-weight: 650; letter-spacing: 0.07em;
  padding: 10px 18px; border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.14); background: rgba(255,255,255,0.03); color: #eaf2fa;
  cursor: pointer; transition: border-color .15s, background .15s;
}
.cm-retry:hover { border-color: var(--ring); background: rgba(0,212,255,0.06); }

/* ── COMPACT PAGER ─────────────────────────────────────────────────── */
.cm-pager {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  flex-wrap: wrap; margin-top: 28px;
}
.cm-pager a {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 10px 16px; border-radius: 999px;
  border: 1px solid var(--card-border); background: rgba(255,255,255,0.03);
  color: #a9bbcd; font-size: 12.5px; font-weight: 500; text-decoration: none;
  transition: border-color .15s, color .15s, background .15s;
  max-width: 100%;
}
.cm-pager a:hover { border-color: var(--ring); color: #fff; background: rgba(0,212,255,0.05); }
.cm-pager .cm-pager-dir {
  font-family: var(--mono); font-size: 9.5px; font-weight: 700; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--accent);
}
.cm-pager .cm-pager-title { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cm-pager .prev { margin-right: auto; }
.cm-pager .next { margin-left: auto; }
.cm-pager .spacer { flex: 1; }

/* ── CTA + RELATED ─────────────────────────────────────────────────── */
.cm-cta {
  margin-top: 34px; padding: 32px 30px;
  border: 1px solid rgba(0,212,255,0.25); border-radius: 20px;
  background: linear-gradient(160deg, rgba(0,212,255,0.10), rgba(14,17,23,0.98) 55%, rgba(10,12,15,0.99));
  box-shadow: 0 28px 70px rgba(0,0,0,0.45);
}
.cm-cta h2 { font-family: var(--display); font-size: 24px; font-weight: 700; color: #fff; letter-spacing: -0.015em; margin-bottom: 10px; }
.cm-cta p { font-size: 14.5px; font-weight: 450; color: var(--sub-color); line-height: 1.7; margin-bottom: 20px; max-width: 640px; }
.cm-cta-btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--sans); font-size: 13px; font-weight: 700; letter-spacing: 0.07em;
  padding: 14px 26px; border-radius: 12px; text-decoration: none;
  background: linear-gradient(135deg, #22ddff, #00a9e8); color: #001018;
  box-shadow: 0 10px 30px rgba(0,212,255,0.28), inset 0 1px 0 rgba(255,255,255,0.35);
  transition: transform .15s, box-shadow .15s;
}
.cm-cta-btn:hover { transform: translateY(-2px); box-shadow: 0 16px 40px rgba(0,212,255,0.36), inset 0 1px 0 rgba(255,255,255,0.35); }
.cm-cta-note { margin-top: 12px; font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.06em; color: #7f94aa; }

.cm-related { margin-top: 40px; }
.cm-related-title {
  font-family: var(--mono); font-size: 10.5px; font-weight: 700; letter-spacing: 0.22em;
  text-transform: uppercase; color: #fff; margin-bottom: 16px;
}
.cm-related-list { list-style: none; display: grid; gap: 10px; }
.cm-related-list a {
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
  padding: 16px 18px; border: 1px solid var(--card-border); border-radius: 14px;
  background: var(--card-bg); color: #cfdcea; font-size: 14px; font-weight: 500; line-height: 1.5;
  text-decoration: none; transition: border-color .2s, transform .2s, color .2s;
}
.cm-related-list a::after { content: '→'; color: var(--accent); flex-shrink: 0; }
.cm-related-list a:hover { border-color: rgba(0,212,255,0.32); transform: translateX(4px); color: #fff; }

/* ── FOOTER ────────────────────────────────────────────────────────── */
footer.site-footer {
  border-top: 1px solid var(--border);
  background: var(--sidebar);
  padding: 64px 32px 34px;
}
.footer-grid {
  max-width: 1160px; margin: 0 auto;
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 48px;
}
.footer-brand { display: flex; flex-direction: column; gap: 16px; align-items: flex-start; }
.footer-logo { font-family: var(--display); font-size: 19px; font-weight: 700; letter-spacing: 2.5px; color: #fff; text-decoration: none; }
.footer-logo span { color: var(--accent); }
.footer-tagline { font-size: 13.5px; font-weight: 450; color: var(--sub-color); line-height: 1.7; max-width: 300px; }
.footer-col-title { font-family: var(--mono); font-size: 10px; font-weight: 700; letter-spacing: 0.22em; color: #fff; margin-bottom: 18px; }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 11px; }
.footer-col a { color: #8ba0b8; font-size: 13.5px; font-weight: 480; text-decoration: none; transition: color .15s; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  max-width: 1160px; margin: 48px auto 0; padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.06);
  display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap;
}
.footer-copy { font-size: 12.5px; font-weight: 450; color: var(--muted); }
.footer-risk-note { font-size: 12px; font-weight: 500; color: #b06a76; line-height: 1.5; text-align: right; max-width: 620px; }

/* ── RESPONSIVE ────────────────────────────────────────────────────── */
@media (max-width: 1080px) {
  .cm-strip { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 980px) {
  .cm-layout { grid-template-columns: minmax(0, 1fr); gap: 34px; padding-bottom: 70px; }
  .cm-side { position: static; }
  .cm-main { max-width: none; }
}
@media (max-width: 900px) {
  nav.site-nav { padding: 0 18px; }
  .nav-hamburger { display: flex; }
  .nav-cta-group { display: none; }
  .nav-links {
    display: none;
    position: fixed; top: 64px; left: 0; right: 0;
    background: rgba(6,9,14,0.97);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    flex-direction: column; align-items: stretch; gap: 2px; padding: 12px 18px 20px;
  }
  .nav-links.open { display: flex; }
  .nav-link { padding: 12px 10px; font-size: 12.5px; }
  .nav-mobile-ctas { display: flex; gap: 10px; margin-top: 12px; }
  .nav-mobile-ctas > a { flex: 1; text-align: center; }
  footer.site-footer { padding: 52px 18px 28px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px 20px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .footer-risk-note { text-align: left; }
}
@media (max-width: 700px) {
  .cm-shell { width: calc(100vw - 28px); }
  .cm-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
  .cm-strip-item { padding: 11px 12px; gap: 10px; border-radius: 12px; }
  .cm-strip-num { width: 26px; height: 26px; border-radius: 8px; font-size: 11px; }
  .cm-strip-name { font-size: 11.5px; }
  .cm-lesson-hdr h2 { font-size: 19px; }
  .cm-lesson-num { width: 34px; height: 34px; border-radius: 10px; font-size: 12px; }
  .cm-q, .cm-test-hdr, .cm-test-foot { padding-left: 18px; padding-right: 18px; }
  .cm-cta { padding: 26px 20px; }
  .cm-pager { flex-direction: column; align-items: stretch; }
  .cm-pager a { justify-content: center; }
  .course-topic-body .backtest-cta { flex-direction: column; align-items: stretch; text-align: center; }
  .course-topic-body .course-cta-link { text-align: center; }
}