/* =========================================================================
   SAVE YOUR ASS AT SEA — Marine Safety Course
   Brand family: Navsas / NaviCap
   Aesthetic: Nautical field-safety-manual + chart paper
   ========================================================================= */

/* --- Fonts: Anton (display), Inter (body), IBM Plex Mono (labels) --- */
@import url('https://fonts.googleapis.com/css2?family=Anton&family=Inter:wght@400;500;600;700;800&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root,
[data-theme='light'] {
  /* Surfaces — warm chart paper */
  --color-bg: #f4efe3;
  --color-surface: #fbf7ec;
  --color-surface-2: #ffffff;
  --color-surface-offset: #ece4d2;
  --color-surface-offset-2: #e2d8c0;
  --color-divider: #d8cdb4;
  --color-border: #cbbf9f;

  /* Text — deep navy ink */
  --color-text: #0b2233;
  --color-text-muted: #4a5a66;
  --color-text-faint: #8a8576;
  --color-text-inverse: #f7f1e3;

  /* Deep ocean */
  --ocean-900: #061826;
  --ocean-800: #0b2233;
  --ocean-700: #103247;
  --ocean-600: #15455f;

  /* Signal orange — life vest / flare / CTA */
  --signal: #ff5a1f;
  --signal-hover: #e8470f;
  --signal-active: #c93a08;
  --signal-soft: #ffe3d6;

  /* Ocean teal */
  --teal: #0e7c7b;
  --teal-hover: #0a6564;

  /* Safety green */
  --safety: #2f7d32;
  --safety-soft: #d8ecd6;

  /* Warning amber */
  --amber: #c98108;

  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px rgba(11, 34, 51, 0.08);
  --shadow-md: 0 6px 20px rgba(11, 34, 51, 0.10);
  --shadow-lg: 0 18px 48px rgba(11, 34, 51, 0.16);
  --shadow-signal: 0 10px 30px rgba(255, 90, 31, 0.35);

  --transition: 200ms cubic-bezier(0.16, 1, 0.3, 1);
  --font-display: 'Anton', 'Arial Narrow', sans-serif;
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
}

[data-theme='dark'] {
  --color-bg: #061826;
  --color-surface: #0b2233;
  --color-surface-2: #103247;
  --color-surface-offset: #0e2b3c;
  --color-surface-offset-2: #15455f;
  --color-divider: #1c3b50;
  --color-border: #27506a;

  --color-text: #e8eef3;
  --color-text-muted: #9fb3c0;
  --color-text-faint: #5e7686;
  --color-text-inverse: #061826;

  --ocean-900: #030f1a;
  --ocean-800: #061826;
  --ocean-700: #0b2233;

  --signal: #ff6a33;
  --signal-hover: #ff8555;
  --signal-active: #e8470f;
  --signal-soft: #3a1f12;

  --teal: #2ba6a5;
  --teal-hover: #3fbab9;

  --safety: #5fbf63;
  --safety-soft: #163a18;

  --amber: #e0a030;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.5);
  --shadow-signal: 0 10px 30px rgba(255, 106, 51, 0.3);
}

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

html {
  -webkit-text-size-adjust: none; text-size-adjust: none;
  -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility; scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  min-height: 100dvh; line-height: 1.6;
  font-family: var(--font-body); font-size: 1.0625rem;
  color: var(--color-text); background-color: var(--color-bg);
}

img, picture, video, svg { display: block; max-width: 100%; height: auto; }
ul, ol { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }

h1, h2, h3, h4 { text-wrap: balance; line-height: 1.05; font-family: var(--font-display); font-weight: 400; letter-spacing: 0.01em; text-transform: uppercase; }
p, li { text-wrap: pretty; max-width: 68ch; }

::selection { background: var(--signal); color: #fff; }
:focus-visible { outline: 3px solid var(--signal); outline-offset: 3px; border-radius: var(--radius-sm); }

button { cursor: pointer; background: none; border: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}

/* --- Layout helpers --- */
.container { width: 100%; max-width: 1180px; margin-inline: auto; padding-inline: clamp(1rem, 4vw, 2rem); }
.container-narrow { max-width: 760px; }
.section { padding-block: clamp(3.5rem, 8vw, 7rem); }
.section-tight { padding-block: clamp(2.5rem, 5vw, 4rem); }

.eyebrow {
  font-family: var(--font-mono); font-size: 0.75rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.18em; color: var(--signal);
  display: inline-flex; align-items: center; gap: 0.5rem;
}
.eyebrow::before { content: ''; width: 22px; height: 2px; background: var(--signal); display: inline-block; }
.eyebrow.muted { color: var(--color-text-muted); }
.eyebrow.muted::before { background: var(--color-text-faint); }

.display { font-family: var(--font-display); text-transform: uppercase; line-height: 0.98; letter-spacing: 0.005em; }
.display .amp { color: var(--signal); }
.lead { font-size: clamp(1.05rem, 1.6vw, 1.3rem); color: var(--color-text-muted); line-height: 1.55; }

.mono { font-family: var(--font-mono); }
.text-muted { color: var(--color-text-muted); }

/* --- Buttons --- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.6rem;
  font-family: var(--font-body); font-weight: 700; font-size: 1rem;
  padding: 0.95rem 1.6rem; border-radius: var(--radius-full);
  transition: transform var(--transition), background var(--transition), box-shadow var(--transition), color var(--transition);
  border: 2px solid transparent; text-align: center; line-height: 1;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--signal); color: #fff; box-shadow: var(--shadow-signal); }
.btn-primary:hover { background: var(--signal-hover); transform: translateY(-2px); }
.btn-dark { background: var(--ocean-800); color: #fff; }
.btn-dark:hover { background: var(--ocean-700); transform: translateY(-2px); }
.btn-outline { background: transparent; color: var(--color-text); border-color: var(--color-border); }
.btn-outline:hover { border-color: var(--signal); color: var(--signal); }
.btn-ghost-light { background: rgba(255,255,255,0.12); color: #fff; border-color: rgba(255,255,255,0.35); backdrop-filter: blur(6px); }
.btn-ghost-light:hover { background: rgba(255,255,255,0.22); transform: translateY(-2px); }
.btn-lg { font-size: 1.1rem; padding: 1.1rem 2rem; }
.btn-block { width: 100%; }

/* --- Header / Nav --- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in oklab, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-divider);
}
.nav { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-block: 0.85rem; }
.brand { display: inline-flex; align-items: center; gap: 0.6rem; font-family: var(--font-display); font-size: 1.3rem; text-transform: uppercase; letter-spacing: 0.01em; color: var(--color-text); }
.brand-mark { width: 38px; height: 38px; flex: none; }
.nav-links { display: none; align-items: center; gap: 1.75rem; }
.nav-links a { font-size: 0.9rem; font-weight: 600; color: var(--color-text-muted); }
.nav-links a:hover { color: var(--signal); }
.nav-actions { display: flex; align-items: center; gap: 0.6rem; }
.theme-toggle { display: grid; place-items: center; width: 40px; height: 40px; border-radius: var(--radius-full); color: var(--color-text-muted); border: 1px solid var(--color-border); transition: all var(--transition); }
.theme-toggle:hover { color: var(--signal); border-color: var(--signal); }
.btn-nav { display: none; }
@media (min-width: 860px) { .nav-links { display: flex; } .btn-nav { display: inline-flex; } }
.nav-toggle { display: grid; place-items: center; width: 40px; height: 40px; border-radius: var(--radius-full); border: 1px solid var(--color-border); color: var(--color-text); }
@media (min-width: 860px) { .nav-toggle { display: none; } }
.mobile-menu { display: none; padding: 1rem 0 1.5rem; border-top: 1px solid var(--color-divider); }
.mobile-menu.open { display: block; }
.mobile-menu a { display: block; padding: 0.7rem 0; font-weight: 600; color: var(--color-text); border-bottom: 1px solid var(--color-divider); }
.mobile-menu .btn { margin-top: 0.8rem; }

/* --- Hero --- */
.hero { position: relative; overflow: hidden; }
.hero-media { position: absolute; inset: 0; z-index: 0; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; }
.hero-media::after { content: ''; position: absolute; inset: 0;
  background: linear-gradient(in oklab, rgba(6,24,38,0.55) 0%, rgba(6,24,38,0.72) 55%, rgba(6,24,38,0.92) 100%); }
.hero-inner { position: relative; z-index: 1; padding-block: clamp(4rem, 12vw, 8.5rem); color: #fff; }
.hero-inner .eyebrow { color: #ffb39a; }
.hero-inner .eyebrow::before { background: #ffb39a; }
.hero h1 { color: #fff; font-size: clamp(2.8rem, 9vw, 6.5rem); margin-top: 1rem; }
.hero h1 .amp { color: var(--signal); }
.hero-sub { color: #e7eef3; font-size: clamp(1.1rem, 2.2vw, 1.5rem); max-width: 36ch; margin-top: 1.25rem; line-height: 1.45; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 0.85rem; margin-top: 2rem; align-items: center; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 1.5rem 2.5rem; margin-top: 2.5rem; padding-top: 2rem; border-top: 1px solid rgba(255,255,255,0.18); }
.hero-meta-item { display: flex; flex-direction: column; gap: 0.15rem; }
.hero-meta-item .num { font-family: var(--font-display); font-size: clamp(1.8rem, 4vw, 2.6rem); color: var(--signal); line-height: 1; }
.hero-meta-item .lbl { font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.12em; color: #c7d4dc; }

.price-tag { display: inline-flex; align-items: baseline; gap: 0.6rem; background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.25); padding: 0.5rem 1rem; border-radius: var(--radius-full); backdrop-filter: blur(6px); }
.price-tag .old { color: #9fb3c0; text-decoration: line-through; font-size: 0.95rem; }
.price-tag .new { font-family: var(--font-display); font-size: 1.5rem; color: #fff; }

/* --- Marquee stat bar --- */
.statbar { background: var(--ocean-900); color: #e7eef3; border-bottom: 1px solid var(--color-divider); }
.statbar .container { display: flex; flex-wrap: wrap; gap: 1.5rem 2.5rem; justify-content: space-between; align-items: center; padding-block: 1rem; }
.statbar .stat { display: flex; align-items: baseline; gap: 0.6rem; }
.statbar .stat .n { font-family: var(--font-display); font-size: 1.6rem; color: var(--signal); }
.statbar .stat .t { font-size: 0.85rem; color: #c7d4dc; }

/* --- Cards --- */
.grid { display: grid; gap: 1.25rem; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 1.6rem; transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition); }
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--signal); }
.card .ic { width: 46px; height: 46px; display: grid; place-items: center; border-radius: var(--radius-md); background: var(--signal-soft); color: var(--signal); margin-bottom: 1rem; }
.card h3 { font-size: 1.15rem; margin-bottom: 0.4rem; }
.card p { font-size: 0.95rem; color: var(--color-text-muted); }

/* --- Section headings --- */
.section-head { max-width: 720px; margin-bottom: clamp(2rem, 5vw, 3.5rem); }
.section-head h2 { font-size: clamp(2rem, 5vw, 3.2rem); margin-top: 0.8rem; }
.section-head p { margin-top: 1rem; }
.center { text-align: center; margin-inline: auto; }
.center .eyebrow::before { display: none; }

/* --- Problem / agitation band --- */
.band-dark { background: var(--ocean-900); color: #e7eef3; }
.band-dark h2 { color: #fff; }
.band-dark .lead { color: #c7d4dc; }

/* --- Curriculum modules --- */
.module { display: grid; grid-template-columns: auto 1fr; gap: 1.2rem 1.4rem; align-items: start; padding: 1.5rem; border: 1px solid var(--color-border); border-radius: var(--radius-lg); background: var(--color-surface); transition: border-color var(--transition), transform var(--transition); }
.module:hover { border-color: var(--signal); transform: translateX(3px); }
.module .num { font-family: var(--font-display); font-size: 2rem; color: var(--signal); line-height: 1; min-width: 2.5rem; }
.module h3 { font-size: 1.2rem; }
.module p { font-size: 0.95rem; color: var(--color-text-muted); margin-top: 0.3rem; }
.module .lessons { font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-text-faint); margin-top: 0.7rem; }
@media (max-width: 560px) { .module { grid-template-columns: 1fr; gap: 0.4rem; } }

/* --- Included list --- */
.included-item { display: flex; gap: 0.9rem; align-items: flex-start; padding: 0.9rem 0; border-bottom: 1px dashed var(--color-divider); }
.included-item:last-child { border-bottom: none; }
.included-item .check { flex: none; width: 26px; height: 26px; display: grid; place-items: center; border-radius: var(--radius-full); background: var(--safety-soft); color: var(--safety); }
.included-item strong { display: block; }
.included-item span { color: var(--color-text-muted); font-size: 0.92rem; }

/* --- Testimonials --- */
.quote { background: var(--color-surface); border: 1px solid var(--color-border); border-left: 4px solid var(--signal); border-radius: var(--radius-lg); padding: 1.6rem; }
.quote .stars { color: var(--amber); font-size: 1rem; letter-spacing: 0.1em; margin-bottom: 0.7rem; }
.quote p { font-size: 1.05rem; line-height: 1.5; }
.quote .who { margin-top: 1rem; font-family: var(--font-mono); font-size: 0.8rem; color: var(--color-text-muted); }

/* --- Guarantee --- */
.guarantee { display: grid; grid-template-columns: auto 1fr; gap: 2rem; align-items: center; background: var(--color-surface); border: 2px solid var(--signal); border-radius: var(--radius-xl); padding: clamp(1.8rem, 4vw, 3rem); }
.guarantee .seal { width: 130px; height: 130px; flex: none; }
.guarantee h2 { font-size: clamp(1.6rem, 4vw, 2.4rem); }
.guarantee p { margin-top: 0.7rem; }
@media (max-width: 600px) { .guarantee { grid-template-columns: 1fr; justify-items: center; text-align: center; } }

/* --- Pricing / CTA card --- */
.pricing-wrap { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 0; border: 1px solid var(--color-border); border-radius: var(--radius-xl); overflow: hidden; box-shadow: var(--shadow-lg); }
.price-card-left { padding: clamp(1.8rem, 4vw, 3rem); background: var(--color-surface); }
.price-card-right { padding: clamp(1.8rem, 4vw, 3rem); background: var(--ocean-900); color: #e7eef3; display: flex; flex-direction: column; }
.price-card-right .price { font-family: var(--font-display); font-size: clamp(3rem, 8vw, 4.5rem); color: #fff; line-height: 1; }
.price-card-right .price .cur { font-size: 0.4em; vertical-align: super; color: var(--signal); }
.price-card-right .save { font-family: var(--font-mono); font-size: 0.8rem; color: #ffb39a; }
.price-card-right .per { color: #9fb3c0; font-size: 0.9rem; }
.price-card-right ul { margin: 1.4rem 0; display: flex; flex-direction: column; gap: 0.7rem; }
.price-card-right li { display: flex; gap: 0.6rem; align-items: flex-start; color: #d7e2ea; font-size: 0.95rem; max-width: none; }
.price-card-right li svg { flex: none; color: var(--signal); margin-top: 3px; }
@media (max-width: 760px) { .pricing-wrap { grid-template-columns: 1fr; } }

/* --- FAQ --- */
.faq-item { border-bottom: 1px solid var(--color-divider); }
.faq-q { width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 1rem; text-align: left; padding: 1.3rem 0; font-family: var(--font-body); font-weight: 700; font-size: 1.05rem; color: var(--color-text); }
.faq-q .pm { flex: none; color: var(--signal); transition: transform var(--transition); font-size: 1.4rem; line-height: 1; }
.faq-item.open .faq-q .pm { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 300ms ease; }
.faq-a-inner { padding-bottom: 1.3rem; color: var(--color-text-muted); }

/* --- Footer --- */
.site-footer { background: var(--ocean-900); color: #c7d4dc; padding-block: clamp(3rem, 6vw, 4.5rem) 2rem; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 2.5rem; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr; gap: 2rem; } }
.site-footer .brand { color: #fff; margin-bottom: 1rem; }
.site-footer p { color: #9fb3c0; font-size: 0.92rem; }
.footer-col h4 { font-family: var(--font-mono); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.14em; color: #fff; margin-bottom: 1rem; }
.footer-col a { display: block; color: #9fb3c0; padding: 0.35rem 0; font-size: 0.92rem; }
.footer-col a:hover { color: var(--signal); }
.footer-bottom { margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid var(--color-divider); display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; align-items: center; font-family: var(--font-mono); font-size: 0.78rem; color: #7a8a96; }
.sources { font-size: 0.75rem; color: #7a8a96; line-height: 1.7; max-width: 90ch; }
.sources a { color: #9fb3c0; text-decoration: underline; }

/* --- Cross-sell banner --- */
.crosssell { display: flex; flex-wrap: wrap; gap: 1.5rem; align-items: center; justify-content: space-between; background: linear-gradient(in oklab, var(--ocean-800), var(--ocean-700)); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: clamp(1.5rem, 4vw, 2.5rem); color: #e7eef3; }
.crosssell .tag { font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.14em; color: var(--signal); }
.crosssell h3 { color: #fff; font-size: clamp(1.4rem, 3vw, 2rem); margin-top: 0.5rem; }

/* ========================= COURSE / DASHBOARD PAGE ========================= */
.course-layout { display: grid; grid-template-columns: 280px 1fr; gap: 2rem; align-items: start; }
@media (max-width: 860px) { .course-layout { grid-template-columns: 1fr; } }
.course-sidebar { position: sticky; top: 90px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 1.4rem; }
.progress-ring { display: flex; flex-direction: column; align-items: center; gap: 0.5rem; margin-bottom: 1.2rem; padding-bottom: 1.2rem; border-bottom: 1px solid var(--color-divider); }
.progress-ring .pct { font-family: var(--font-display); font-size: 2.2rem; color: var(--signal); line-height: 1; }
.progress-ring .pct-lbl { font-family: var(--font-mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--color-text-muted); }
.sidebar-mod { display: flex; gap: 0.7rem; align-items: center; padding: 0.6rem 0.4rem; border-radius: var(--radius-sm); font-size: 0.9rem; cursor: pointer; transition: background var(--transition); }
.sidebar-mod:hover { background: var(--color-surface-offset); }
.sidebar-mod.active { background: var(--signal-soft); color: var(--signal-active); font-weight: 600; }
.sidebar-mod .dot { width: 18px; height: 18px; flex: none; display: grid; place-items: center; }
.sidebar-mod.done .dot { color: var(--safety); }

.lesson-card { display: block; padding: 1.3rem 1.5rem; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); transition: border-color var(--transition), transform var(--transition); }
.lesson-card:hover { border-color: var(--signal); transform: translateX(3px); }
.lesson-card .lh { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.lesson-card .lt { font-weight: 700; }
.lesson-card .lm { font-family: var(--font-mono); font-size: 0.72rem; color: var(--color-text-faint); margin-top: 0.3rem; text-transform: uppercase; letter-spacing: 0.08em; }
.lesson-card.locked { opacity: 0.6; }
.lock-badge { font-family: var(--font-mono); font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-text-faint); border: 1px solid var(--color-border); padding: 0.2rem 0.5rem; border-radius: var(--radius-full); }
.done-badge { font-family: var(--font-mono); font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--safety); }

/* ========================= LESSON PAGE ========================= */
.lesson-layout { display: grid; grid-template-columns: 220px 1fr; gap: 2rem; align-items: start; }
@media (max-width: 860px) { .lesson-layout { grid-template-columns: 1fr; } .lesson-toc { display: none; } }
.lesson-toc { position: sticky; top: 90px; font-size: 0.85rem; }
.lesson-toc h4 { font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--color-text-muted); margin-bottom: 0.8rem; }
.lesson-toc a { display: block; padding: 0.4rem 0; color: var(--color-text-muted); border-left: 2px solid var(--color-divider); padding-left: 0.8rem; }
.lesson-toc a:hover, .lesson-toc a.active { color: var(--signal); border-color: var(--signal); }
.lesson-body h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin-top: 2rem; margin-bottom: 0.8rem; }
.lesson-body h2:first-child { margin-top: 0; }
.lesson-body h3 { font-family: var(--font-body); font-weight: 700; font-size: 1.1rem; text-transform: none; letter-spacing: 0; margin-top: 1.5rem; margin-bottom: 0.4rem; }
.lesson-body p { margin-bottom: 1rem; }
.lesson-body ul.bullets { list-style: none; margin: 0 0 1.2rem; }
.lesson-body ul.bullets li { position: relative; padding-left: 1.6rem; margin-bottom: 0.5rem; }
.lesson-body ul.bullets li::before { content: ''; position: absolute; left: 0; top: 0.55em; width: 8px; height: 8px; background: var(--signal); border-radius: 50%; }
.callout { border-left: 4px solid var(--signal); background: var(--signal-soft); padding: 1rem 1.2rem; border-radius: var(--radius-md); margin: 1.5rem 0; }
.callout.warn { border-color: var(--amber); background: color-mix(in oklab, var(--amber) 12%, var(--color-surface)); }
.callout .lbl { font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.12em; font-weight: 600; margin-bottom: 0.3rem; display: block; }

/* Interactive checklist */
.checklist { border: 1px solid var(--color-border); border-radius: var(--radius-md); overflow: hidden; margin: 1.2rem 0; }
.check-row { display: flex; gap: 0.9rem; align-items: flex-start; padding: 0.9rem 1.1rem; border-bottom: 1px solid var(--color-divider); cursor: pointer; transition: background var(--transition); }
.check-row:last-child { border-bottom: none; }
.check-row:hover { background: var(--color-surface-offset); }
.check-row .box { width: 22px; height: 22px; flex: none; border: 2px solid var(--color-border); border-radius: var(--radius-sm); display: grid; place-items: center; margin-top: 1px; transition: all var(--transition); }
.check-row.checked .box { background: var(--safety); border-color: var(--safety); color: #fff; }
.check-row .box svg { opacity: 0; transition: opacity var(--transition); width: 14px; height: 14px; }
.check-row.checked .box svg { opacity: 1; }
.check-row .ct { flex: 1; }
.check-row .ct strong { display: block; font-weight: 600; }
.check-row .ct span { font-size: 0.88rem; color: var(--color-text-muted); }
.check-row.checked .ct strong { text-decoration: line-through; color: var(--color-text-muted); }
.checklist-progress { display: flex; align-items: center; gap: 1rem; padding: 0.9rem 1.1rem; background: var(--color-surface-offset); border-bottom: 1px solid var(--color-divider); }
.checklist-progress .bar { flex: 1; height: 8px; background: var(--color-surface-offset-2); border-radius: var(--radius-full); overflow: hidden; }
.checklist-progress .fill { height: 100%; background: var(--safety); width: 0; transition: width 300ms ease; }
.checklist-progress .pct { font-family: var(--font-mono); font-size: 0.8rem; font-weight: 600; color: var(--safety); min-width: 42px; text-align: right; }

/* Quiz */
.quiz { border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 1.4rem; background: var(--color-surface); margin: 1.5rem 0; }
.quiz .q { font-weight: 700; margin-bottom: 1rem; }
.quiz .opts { display: flex; flex-direction: column; gap: 0.6rem; }
.quiz .opt { display: flex; gap: 0.7rem; align-items: center; padding: 0.8rem 1rem; border: 1px solid var(--color-border); border-radius: var(--radius-sm); cursor: pointer; transition: all var(--transition); }
.quiz .opt:hover { border-color: var(--signal); }
.quiz .opt .letter { width: 24px; height: 24px; flex: none; border: 1px solid var(--color-border); border-radius: var(--radius-full); display: grid; place-items: center; font-family: var(--font-mono); font-size: 0.8rem; font-weight: 600; }
.quiz .opt.correct { background: var(--safety-soft); border-color: var(--safety); color: var(--safety); }
.quiz .opt.correct .letter { background: var(--safety); color: #fff; border-color: var(--safety); }
.quiz .opt.wrong { background: color-mix(in oklab, var(--signal) 12%, transparent); border-color: var(--signal); }
.quiz .feedback { margin-top: 1rem; font-size: 0.92rem; display: none; padding: 0.8rem; border-radius: var(--radius-sm); }
.quiz .feedback.show { display: block; }
.quiz .feedback.right { background: var(--safety-soft); color: var(--safety); }
.quiz .feedback.wrong { background: var(--signal-soft); color: var(--signal-active); }

.lesson-nav { display: flex; justify-content: space-between; gap: 1rem; margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--color-divider); }
.lesson-nav .btn { flex: 1; }

/* --- Checkout modal --- */
.modal-overlay { position: fixed; inset: 0; z-index: 100; background: rgba(6,24,38,0.7); backdrop-filter: blur(4px); display: none; align-items: center; justify-content: center; padding: 1.2rem; }
.modal-overlay.open { display: flex; }
.modal { background: var(--color-surface); border-radius: var(--radius-xl); max-width: 460px; width: 100%; box-shadow: var(--shadow-lg); overflow: hidden; max-height: 92vh; overflow-y: auto; }
.modal-head { background: var(--ocean-900); color: #fff; padding: 1.6rem; position: relative; }
.modal-head .close { position: absolute; top: 1rem; right: 1rem; color: #c7d4dc; font-size: 1.5rem; width: 36px; height: 36px; display: grid; place-items: center; border-radius: var(--radius-full); }
.modal-head .close:hover { color: #fff; background: rgba(255,255,255,0.12); }
.modal-body { padding: 1.6rem; }
.modal-body .price-line { display: flex; justify-content: space-between; align-items: baseline; padding-bottom: 1rem; border-bottom: 1px solid var(--color-divider); margin-bottom: 1.2rem; }
.modal-body .price-line .big { font-family: var(--font-display); font-size: 2.4rem; color: var(--color-text); }
.modal-body .price-line .old { text-decoration: line-through; color: var(--color-text-faint); font-size: 0.95rem; }
.field { margin-bottom: 1rem; }
.field label { display: block; font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-text-muted); margin-bottom: 0.4rem; }
.field input { width: 100%; padding: 0.8rem 0.9rem; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface-2); font-size: 1rem; }
.field input:focus { outline: none; border-color: var(--signal); }
.secure-note { display: flex; gap: 0.5rem; align-items: center; justify-content: center; font-family: var(--font-mono); font-size: 0.72rem; color: var(--color-text-muted); margin-top: 1rem; }

/* --- Sticky mobile CTA --- */
.mobile-cta { position: fixed; bottom: 0; left: 0; right: 0; z-index: 40; background: color-mix(in oklab, var(--color-bg) 94%, transparent); backdrop-filter: blur(12px); border-top: 1px solid var(--color-border); padding: 0.7rem 1rem; display: none; gap: 1rem; align-items: center; }
.mobile-cta .mp { display: flex; flex-direction: column; line-height: 1.1; }
.mobile-cta .mp .big { font-family: var(--font-display); font-size: 1.3rem; }
.mobile-cta .mp .sm { font-size: 0.72rem; color: var(--color-text-muted); }
.mobile-cta .btn { flex: 1; }
@media (max-width: 700px) { .mobile-cta { display: flex; } body { padding-bottom: 70px; } }

/* --- Reveal animation --- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 600ms ease, transform 600ms ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } }

/* --- Utilities --- */
.mt-1 { margin-top: 0.5rem; } .mt-2 { margin-top: 1rem; } .mt-3 { margin-top: 1.5rem; } .mt-4 { margin-top: 2rem; }
.mb-0 { margin-bottom: 0; } .mb-2 { margin-bottom: 1rem; }
.text-center { text-align: center; }
.flex { display: flex; } .flex-wrap { flex-wrap: wrap; } .gap-1 { gap: 0.5rem; } .gap-2 { gap: 1rem; }
.items-center { align-items: center; } .justify-center { justify-content: center; }
.divider { height: 1px; background: var(--color-divider); border: none; margin-block: clamp(2.5rem, 6vw, 4.5rem); }
.kicker-badge { display: inline-flex; align-items: center; gap: 0.4rem; font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.12em; background: var(--signal); color: #fff; padding: 0.3rem 0.7rem; border-radius: var(--radius-full); }