/* ============================================================
   Meridian Dispatch Academy — Design System (BEM)
   Flight-ops briefing aesthetic: navy · sky · chart green
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@500;600;700&family=Barlow:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500&family=Teko:wght@500;600;700&display=swap');

:root {
  --navy-950: #041018;
  --navy-900: #0a1c2e;
  --navy-800: #12304a;
  --navy-700: #1a4060;
  --navy-600: #255078;
  --sky-500: #3d8fb8;
  --sky-400: #5ba8ce;
  --sky-300: #8cc4de;
  --sky-200: #c5e0ee;
  --chart-700: #1e5c48;
  --chart-600: #2a7a5e;
  --chart-500: #3d9a76;
  --chart-400: #52b892;
  --amber-500: #c9922a;
  --amber-400: #dbab45;
  --cloud-50: #f3f6f9;
  --cloud-100: #e8eef3;
  --cloud-200: #d0dbe5;
  --cloud-300: #a8b8c8;
  --ink: #0e2030;
  --ink-muted: #4a6070;
  --slate-700: #334155;
  --text-muted: var(--ink-muted);
  --white: #ffffff;
  --danger: #c44a3c;
  --success: #2a7a5e;

  --font-brand: "Teko", sans-serif;
  --font-display: "Barlow Condensed", sans-serif;
  --font-body: "Barlow", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-8: 3rem;
  --space-10: 4.5rem;
  --space-12: 6rem;
  --max: 1180px;
  --radius: 4px;
  --radius-lg: 8px;
  --header-h: 68px;

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.45, 0, 0.55, 1);
  --dur: 0.45s;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--cloud-50);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--sky-500); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--navy-800); }
ul, ol { list-style: none; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; border: none; background: none; }
code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--cloud-100);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  color: var(--navy-800);
}
h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.2;
  letter-spacing: 0.03em;
  color: var(--navy-900);
}
h1 { font-size: clamp(1.85rem, 4vw, 2.75rem); font-weight: 700; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 600; }

.page-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.page-shell > main { flex: 1; }

.grain { position: relative; }
.grain::after {
  content: "";
  pointer-events: none;
  position: absolute;
  inset: 0;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  z-index: 1;
}

.atmosphere-sky {
  background:
    linear-gradient(160deg, var(--navy-900) 0%, var(--navy-800) 70%, var(--navy-700) 100%);
  color: var(--white);
}
.atmosphere-panel {
  background:
    linear-gradient(160deg, var(--cloud-50) 0%, var(--sky-200) 120%);
}

.container {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}
.container-narrow {
  width: min(100% - 2.5rem, 560px);
  margin-inline: auto;
}
.main-content {
  padding: var(--space-8) 0 var(--space-10);
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 28, 46, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(91, 168, 206, 0.2);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: var(--space-4);
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  z-index: 101;
  text-decoration: none;
  color: var(--white);
  flex-shrink: 0;
}
.logo__mark {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}
.logo__text {
  font-family: var(--font-brand);
  font-size: 1.45rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1;
  color: var(--white);
}
.logo__text span {
  display: block;
  font-family: var(--font-display);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--sky-300);
  margin-top: 0.15rem;
}
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.nav a {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--cloud-200);
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius);
  transition: color 0.2s, background 0.2s;
}
.nav a:hover,
.nav a.is-active {
  color: var(--white);
  background: rgba(91, 168, 206, 0.15);
}
.nav a.is-active { color: var(--chart-400); }
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: auto;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  z-index: 101;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--white);
  transition: transform 0.3s var(--ease-out), opacity 0.2s;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-mobile {
  display: none;
  flex-direction: column;
  gap: var(--space-1);
  padding: 0 var(--space-5) var(--space-5);
  background: var(--navy-950);
  border-bottom: 1px solid rgba(91, 168, 206, 0.2);
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.35s var(--ease-out), opacity 0.25s, padding 0.25s;
}
.nav-mobile.is-open {
  display: flex;
  max-height: 420px;
  opacity: 1;
  padding-top: var(--space-2);
}
.nav-mobile a {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--cloud-200);
  padding: 0.75rem 0.5rem;
  border-radius: var(--radius);
}
.nav-mobile a:hover,
.nav-mobile a.is-active {
  color: var(--chart-400);
  background: rgba(91, 168, 206, 0.1);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  border: 1.5px solid transparent;
  transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.2s;
  text-decoration: none;
  white-space: nowrap;
  color: inherit;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn--primary {
  background: var(--chart-500);
  color: var(--white);
  border-color: var(--chart-500);
}
.btn--primary:hover {
  background: var(--chart-600);
  border-color: var(--chart-600);
  color: var(--white);
}
.btn--secondary {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.45);
}
.btn--secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--white);
  border-color: var(--white);
}
.btn--outline {
  background: transparent;
  color: var(--navy-800);
  border-color: var(--navy-700);
}
.btn--outline:hover {
  background: var(--navy-900);
  color: var(--white);
}
.btn--ghost {
  background: transparent;
  color: var(--sky-300);
  border-color: transparent;
  padding-inline: 0.75rem;
}
.btn--ghost:hover { color: var(--white); }
.btn--success {
  background: var(--chart-600);
  color: var(--white);
  border-color: var(--chart-600);
}
.btn--success:hover {
  background: var(--chart-700);
  border-color: var(--chart-700);
  color: var(--white);
}
.btn--sm {
  padding: 0.45rem 1rem;
  font-size: 0.85rem;
}
.btn--block { width: 100%; }
.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
}

/* ---------- Typography helpers ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--chart-500);
  margin-bottom: var(--space-2);
}
.eyebrow--light { color: var(--chart-400); }
.lead {
  font-size: 1.1rem;
  color: var(--ink-muted);
  max-width: 36em;
  margin-top: var(--space-2);
}
.page-hero .lead,
.hero .lead,
.atmosphere-sky .lead { color: var(--sky-200); }
.text-muted { color: var(--ink-muted); }
.text-on-dark-muted { color: var(--sky-200); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-5 { margin-bottom: var(--space-5); }
.mb-6 { margin-bottom: var(--space-6); }
.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

/* ---------- Hero (landing) ---------- */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: flex;
  align-items: center;
  overflow: hidden;
  background:
    linear-gradient(165deg, rgba(4, 16, 24, 0.88) 0%, rgba(10, 28, 46, 0.75) 45%, rgba(18, 48, 74, 0.65) 100%),
    url("../images/hero-runway.jpg") center / cover no-repeat;
  color: var(--white);
}
.hero__bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(91, 168, 206, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(91, 168, 206, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, black 40%, transparent 95%);
  z-index: 0;
}
.hero__content {
  position: relative;
  z-index: 2;
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
  padding: var(--space-10) 0 var(--space-12);
  max-width: 640px;
  margin-left: max(1.25rem, calc((100% - var(--max)) / 2));
}
.hero__brand {
  font-family: var(--font-brand);
  font-size: clamp(3.5rem, 10vw, 6.5rem);
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 0.92;
  margin-bottom: var(--space-4);
  color: var(--white);
  animation: fadeRise 0.9s var(--ease-out) both;
}
.hero__brand em {
  font-style: normal;
  color: var(--chart-400);
  display: block;
}
.hero__tagline {
  font-size: 1.1rem;
  color: var(--cloud-200);
  max-width: 420px;
  margin-bottom: var(--space-6);
  animation: fadeRise 0.9s var(--ease-out) 0.18s both;
}
.hero__content .btn-group {
  animation: fadeRise 0.9s var(--ease-out) 0.3s both;
}
.hero__horizon {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 120px;
  background: linear-gradient(180deg, transparent, rgba(4, 16, 24, 0.85));
  z-index: 1;
  pointer-events: none;
}

@keyframes fadeRise {
  from { opacity: 0; transform: translateY(28px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Sections ---------- */
.section {
  padding: var(--space-10) 0;
  position: relative;
}
.section-header {
  margin-bottom: var(--space-8);
  max-width: 560px;
}
.section-header h2 {
  margin-bottom: var(--space-3);
}
.section-header .lead { margin-top: 0; }

.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: center;
}
.feature-row--reverse {
  direction: rtl;
}
.feature-row--reverse > * { direction: ltr; }
.feature-row__visual {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  background: var(--navy-800);
}
.feature-row__visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.feature-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}
.feature-list li {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}
.feature-list__icon {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--chart-500);
  min-width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(61, 154, 118, 0.35);
  border-radius: var(--radius);
  background: rgba(61, 154, 118, 0.08);
  flex-shrink: 0;
}
.feature-list strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.03em;
  color: var(--navy-900);
  margin-bottom: 0.2rem;
}
.feature-list span {
  color: var(--ink-muted);
  font-size: 0.95rem;
}

/* Stats */
.stats-band {
  padding: var(--space-8) 0;
  background: var(--navy-900);
  color: var(--white);
  border-block: 1px solid rgba(91, 168, 206, 0.15);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}
.stat { text-align: left; }
.stat__value {
  font-family: var(--font-brand);
  font-size: clamp(2.25rem, 4vw, 3.25rem);
  font-weight: 600;
  line-height: 1;
  color: var(--chart-400);
  margin-bottom: var(--space-2);
}
.stat__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--sky-300);
}

/* Course tiles / grids */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}
.course-tile {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border: 1px solid var(--cloud-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color 0.25s, transform 0.25s var(--ease-out);
  text-decoration: none;
  color: inherit;
}
.course-tile:hover {
  border-color: var(--sky-400);
  transform: translateY(-3px);
  color: inherit;
}
.course-tile__media {
  aspect-ratio: 16 / 9;
  background: var(--navy-800);
  position: relative;
  overflow: hidden;
}
.course-tile__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease-out);
}
.course-tile:hover .course-tile__media img { transform: scale(1.04); }
.course-tile__badge {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--navy-900);
  color: var(--chart-400);
  padding: 0.3rem 0.55rem;
  border-radius: var(--radius);
}
.course-tile__body {
  padding: var(--space-5);
  flex: 1;
  display: flex;
  flex-direction: column;
}
.course-tile__meta {
  display: flex;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-muted);
  letter-spacing: 0.04em;
  margin-bottom: var(--space-2);
}
.course-tile__body h3 {
  margin-bottom: var(--space-2);
}
.course-tile__body > p {
  font-size: 0.95rem;
  color: var(--ink-muted);
  flex: 1;
  margin-bottom: var(--space-4);
}
.course-tile__footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--cloud-100);
  padding-top: var(--space-3);
  margin-top: auto;
}
.price {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--chart-600);
  letter-spacing: 0.04em;
}

/* CTA band */
.cta-band {
  padding: var(--space-10) 0;
  background:
    linear-gradient(135deg, var(--navy-900) 0%, var(--navy-700) 50%, var(--chart-700) 160%);
  color: var(--white);
  position: relative;
  overflow: hidden;
}
.cta-band__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-6);
  flex-wrap: wrap;
  position: relative;
  z-index: 2;
}
.cta-band h2 {
  color: var(--white);
  margin-top: var(--space-2);
}

/* ---------- Page hero (inner pages) ---------- */
.page-hero {
  position: relative;
  padding: var(--space-8) 0 var(--space-6);
  overflow: hidden;
}
.page-hero h1 {
  color: var(--white);
  margin-bottom: var(--space-2);
}
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--cloud-300);
  margin-bottom: var(--space-3);
}
.breadcrumb a { color: var(--sky-300); }
.breadcrumb a:hover { color: var(--white); }
.breadcrumb__sep { margin: 0 0.4rem; opacity: 0.5; }

/* ---------- Surfaces / layout ---------- */
.surface {
  background: var(--white);
  border: 1px solid var(--cloud-200);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}
.split-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--space-6);
  align-items: start;
}

/* ---------- Auth ---------- */
.auth-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: calc(100vh - var(--header-h) - 80px);
}
.auth-visual {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-8);
  color: var(--white);
  overflow: hidden;
  min-height: 280px;
}
.auth-visual__bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(165deg, rgba(4, 16, 24, 0.85), rgba(30, 92, 72, 0.45)),
    url("../images/page-hero-ops.jpg") center / cover no-repeat;
  z-index: 0;
}
.auth-visual__content {
  position: relative;
  z-index: 2;
}
.auth-visual__content h2 {
  font-family: var(--font-brand);
  font-size: clamp(2.25rem, 4vw, 3rem);
  font-weight: 600;
  color: var(--white);
  letter-spacing: 0.02em;
  margin-bottom: var(--space-3);
  line-height: 1.05;
}
.auth-panel {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-6);
  background: var(--white);
}
.auth-card {
  width: 100%;
  max-width: 400px;
}
.auth-card h1 {
  margin-bottom: var(--space-2);
}
.auth-card > .lead {
  margin-bottom: var(--space-6);
}
.auth-footer {
  margin-top: var(--space-5);
  text-align: center;
  font-size: 0.95rem;
  color: var(--ink-muted);
}

/* Forms */
.form-stack { display: flex; flex-direction: column; gap: 0; }
.form-group { margin-bottom: var(--space-4); }
.form-group label {
  display: block;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--navy-700);
  margin-bottom: var(--space-2);
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--cloud-200);
  border-radius: var(--radius);
  background: var(--cloud-50);
  color: var(--ink);
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--sky-400);
  background: var(--white);
  box-shadow: 0 0 0 3px rgba(91, 168, 206, 0.2);
}
.form-group textarea { min-height: 110px; resize: vertical; }
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}
.form-row--2 { grid-template-columns: 1fr 1fr; }
.form-hint {
  font-size: 0.85rem;
  color: var(--ink-muted);
  margin-top: var(--space-2);
}
.form-check {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  font-size: 0.95rem;
  color: var(--ink-muted);
}
.form-check input {
  width: 1rem;
  height: 1rem;
  accent-color: var(--chart-500);
}
.form-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-top: var(--space-5);
}

.alert {
  padding: var(--space-4);
  border-radius: var(--radius);
  margin-bottom: var(--space-4);
  font-size: 0.95rem;
}
.alert--success {
  background: rgba(61, 154, 118, 0.12);
  border: 1px solid var(--chart-400);
  color: var(--chart-700);
}
.alert--info {
  background: rgba(91, 168, 206, 0.12);
  border: 1px solid var(--sky-400);
  color: var(--navy-700);
}

/* ---------- Dashboard ---------- */
.dash-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-5);
}
.progress-list { display: flex; flex-direction: column; gap: var(--space-4); }
.progress-item {
  background: var(--white);
  border: 1px solid var(--cloud-200);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}
.progress-item__header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}
.progress-item__header h3 {
  font-size: 1.05rem;
}
.progress-pct {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--chart-600);
  flex-shrink: 0;
}
.progress-bar {
  height: 6px;
  background: var(--cloud-100);
  border-radius: 2px;
  overflow: hidden;
}
.progress-bar__fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--chart-600), var(--chart-400));
  border-radius: 2px;
  transition: width 1s var(--ease-out);
}

.module-list { display: flex; flex-direction: column; gap: 0; }
.module-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--cloud-100);
  text-decoration: none;
  color: inherit;
}
.module-item:last-child { border-bottom: none; }
.module-item:hover { color: inherit; }
.module-item__status {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  flex-shrink: 0;
  border: 1.5px solid var(--cloud-200);
  color: var(--cloud-300);
  font-family: var(--font-mono);
}
.module-item__status--done {
  background: var(--chart-500);
  border-color: var(--chart-500);
  color: var(--white);
}
.module-item__status--current {
  border-color: var(--sky-400);
  color: var(--sky-500);
  background: rgba(91, 168, 206, 0.12);
}
.module-item__status--locked {
  border-color: var(--cloud-200);
  color: var(--cloud-300);
}
.module-item strong {
  display: block;
  font-size: 0.95rem;
  color: var(--navy-800);
}
.module-item__meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-muted);
}

/* ---------- Filters ---------- */
.filter-bar {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-6);
}
.filter-chip {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.5rem 1rem;
  border: 1.5px solid var(--cloud-200);
  border-radius: var(--radius);
  background: var(--white);
  color: var(--ink-muted);
  transition: all 0.2s;
}
.filter-chip:hover,
.filter-chip.is-active {
  border-color: var(--navy-800);
  background: var(--navy-900);
  color: var(--white);
}

/* ---------- Course detail / syllabus ---------- */
.syllabus {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border: 1px solid var(--cloud-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.syllabus-module {
  border-bottom: 1px solid var(--cloud-200);
}
.syllabus-module:last-child { border-bottom: none; }
.syllabus-module__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-4) var(--space-5);
  text-align: left;
  cursor: pointer;
}
.syllabus-module__head h3 {
  font-size: 1.1rem;
}
.syllabus-module__body {
  padding: 0 var(--space-5) var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.syllabus-lesson {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--ink);
  font-size: 0.95rem;
  transition: background 0.2s;
}
.syllabus-lesson:hover { background: var(--cloud-100); color: var(--ink); }
.syllabus-lesson span:last-child {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-muted);
  flex-shrink: 0;
}

.course-aside {
  position: sticky;
  top: calc(var(--header-h) + 1.5rem);
  background: var(--navy-900);
  color: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}
.course-aside .price {
  font-family: var(--font-brand);
  font-size: 3rem;
  font-weight: 600;
  line-height: 1;
  color: var(--chart-400);
  margin-bottom: var(--space-2);
}
.course-aside .text-muted { color: var(--sky-300); }
.course-aside ul {
  margin: var(--space-5) 0 var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.course-aside li {
  font-size: 0.95rem;
  color: var(--sky-200);
  padding-left: 1.25rem;
  position: relative;
}
.course-aside li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 8px;
  height: 8px;
  background: var(--chart-400);
  border-radius: 1px;
}
.course-aside .form-hint { color: rgba(200, 220, 230, 0.65); }
.course-aside .btn--outline {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.35);
}
.course-aside .btn--outline:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
}

/* ---------- Lesson player ---------- */
.lesson-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 0;
  min-height: calc(100vh - var(--header-h));
  background: var(--navy-950);
  padding: var(--space-5) 0;
  width: 100%;
}
.lesson-layout > div:first-child {
  min-width: 0;
  padding: 0 var(--space-5);
}
.lesson-layout .breadcrumb { color: var(--cloud-300); }
.video-player {
  background: var(--navy-900);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(91, 168, 206, 0.15);
  margin-bottom: var(--space-5);
}
.video-player__stage {
  position: relative;
  aspect-ratio: 16 / 9;
  background:
    linear-gradient(160deg, #0a1c2e 0%, #12304a 50%, #1e5c48 140%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.video-player__stage::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(91, 168, 206, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(91, 168, 206, 0.08) 1px, transparent 1px);
  background-size: 32px 32px;
}
.video-play {
  position: relative;
  z-index: 2;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(61, 154, 118, 0.9);
  border: 2px solid var(--chart-400);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  transition: transform 0.25s var(--ease-out), background 0.2s;
}
.video-play:hover {
  transform: scale(1.08);
  background: var(--chart-500);
}
.video-play svg {
  width: 28px;
  height: 28px;
  fill: currentColor;
}
.video-player__controls {
  background: var(--navy-900);
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid rgba(91, 168, 206, 0.15);
}
.video-timeline {
  height: 4px;
  background: var(--navy-700);
  border-radius: 2px;
  margin-bottom: var(--space-3);
  cursor: pointer;
  position: relative;
}
.video-timeline__progress {
  height: 100%;
  width: 42%;
  background: var(--chart-400);
  border-radius: 2px;
  position: relative;
}
.video-timeline__progress::after {
  content: "";
  position: absolute;
  right: -5px;
  top: 50%;
  transform: translateY(-50%);
  width: 10px;
  height: 10px;
  background: var(--white);
  border-radius: 50%;
}
.video-controls-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  color: var(--cloud-200);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}
.video-controls-row .btn--ghost { color: var(--cloud-200); }
.lesson-body {
  background: var(--white);
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-5);
}
.lesson-body h2 {
  margin-bottom: var(--space-3);
}
.lesson-body p {
  color: var(--ink-muted);
  margin-bottom: var(--space-4);
}
.lesson-nav {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  margin-top: var(--space-6);
  padding-top: var(--space-5);
  border-top: 1px solid var(--cloud-100);
  flex-wrap: wrap;
}
.lesson-sidebar {
  background: var(--navy-900);
  border-left: 1px solid rgba(91, 168, 206, 0.15);
  overflow-y: auto;
  max-height: calc(100vh - var(--header-h));
}
.lesson-sidebar__head {
  padding: var(--space-4);
  border-bottom: 1px solid rgba(91, 168, 206, 0.15);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--sky-300);
}
.outline-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid rgba(91, 168, 206, 0.08);
  color: var(--cloud-300);
  font-size: 0.9rem;
  transition: background 0.2s, color 0.2s;
  text-decoration: none;
}
.outline-item:hover { background: rgba(91, 168, 206, 0.08); color: var(--white); }
.outline-item.is-active {
  background: rgba(61, 154, 118, 0.15);
  color: var(--chart-400);
  border-left: 3px solid var(--chart-400);
}
.outline-item.is-complete { color: var(--sky-200); }
.outline-item__num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--sky-400);
  min-width: 1.5rem;
}

/* ---------- Quiz ---------- */
.quiz-layout {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--space-8) 0 var(--space-10);
}
.quiz-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-muted);
}
.quiz-progress-track {
  height: 4px;
  background: var(--cloud-200);
  border-radius: 2px;
  margin-bottom: var(--space-5);
  overflow: hidden;
}
.quiz-progress-track__fill {
  height: 100%;
  width: 40%;
  background: var(--chart-500);
}
.question-card {
  background: var(--white);
  border: 1px solid var(--cloud-200);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-5);
}
.question-card__num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--chart-500);
  margin-bottom: var(--space-2);
}
.question-card h2 {
  font-size: 1.35rem;
  margin-bottom: var(--space-5);
  line-height: 1.35;
}
.option-list { display: flex; flex-direction: column; gap: var(--space-3); }
.option {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  border: 1.5px solid var(--cloud-200);
  border-radius: var(--radius);
  background: var(--cloud-50);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  text-align: left;
  width: 100%;
  color: var(--ink);
}
.option:hover {
  border-color: var(--sky-400);
  background: var(--white);
}
.option.is-selected {
  border-color: var(--chart-500);
  background: rgba(61, 154, 118, 0.08);
}
.option__letter {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1.5px solid currentColor;
  border-radius: var(--radius);
  flex-shrink: 0;
  color: var(--navy-700);
}
.option.is-selected .option__letter {
  background: var(--chart-500);
  border-color: var(--chart-500);
  color: var(--white);
}

.score-display {
  text-align: center;
  padding: var(--space-8) var(--space-5);
  margin-bottom: var(--space-6);
}
.score-display__value {
  font-family: var(--font-brand);
  font-size: 4rem;
  font-weight: 600;
  line-height: 1;
  color: var(--chart-500);
  margin-bottom: var(--space-2);
}
.score-display__label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: var(--space-4);
}

.feedback-list { display: flex; flex-direction: column; gap: var(--space-3); }
.feedback-item {
  padding: var(--space-4);
  background: var(--white);
  border: 1px solid var(--cloud-200);
  border-radius: var(--radius);
  border-left: 4px solid var(--cloud-200);
}
.feedback-item--pass { border-left-color: var(--chart-500); }
.feedback-item--fail { border-left-color: var(--danger); }
.feedback-item strong {
  display: block;
  font-size: 0.95rem;
  color: var(--navy-800);
}

/* ---------- Certificates ---------- */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-5);
}
.cert-card {
  background: var(--white);
  border: 1px solid var(--cloud-200);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: flex;
  gap: var(--space-4);
  align-items: stretch;
}
.cert-card__preview {
  width: 140px;
  min-height: 160px;
  background: linear-gradient(160deg, var(--navy-900), var(--chart-700));
  border-radius: var(--radius);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-4);
  color: var(--white);
  border: 1px solid rgba(91, 168, 206, 0.3);
}
.cert-card__preview .eyebrow { color: var(--chart-400); }
.cert-card__preview h3 {
  color: var(--white);
  font-size: 1rem;
  line-height: 1.25;
}

.certificate-sheet {
  max-width: 900px;
  margin: var(--space-6) auto 0;
  background: linear-gradient(180deg, #fafbfc 0%, #f0f4f7 100%);
  border: 3px solid var(--navy-800);
  padding: var(--space-8) var(--space-6);
  text-align: center;
  position: relative;
  box-shadow: inset 0 0 0 1px var(--chart-500);
}
.certificate-sheet::before {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px solid rgba(18, 48, 74, 0.25);
  pointer-events: none;
}
.certificate-sheet__seal {
  margin: 0 auto var(--space-4);
  position: relative;
  z-index: 1;
}
.certificate-sheet h1 {
  margin: var(--space-3) 0 var(--space-5);
  position: relative;
  z-index: 1;
}
.certificate-sheet .recipient {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--navy-900);
  border-bottom: 1.5px solid var(--navy-800);
  display: inline-block;
  padding: 0 var(--space-6) var(--space-2);
  margin: var(--space-3) 0 var(--space-4);
}
.certificate-sheet .course-name {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--navy-800);
  margin: var(--space-3) 0 var(--space-5);
}
.cert-signatures {
  display: flex;
  justify-content: space-around;
  gap: var(--space-4);
  max-width: 640px;
  margin: var(--space-8) auto 0;
  position: relative;
  z-index: 1;
}
.cert-sig {
  text-align: center;
  font-size: 0.85rem;
  color: var(--ink-muted);
}
.cert-sig strong {
  display: block;
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  color: var(--navy-900);
  border-top: 1px solid var(--navy-800);
  padding-top: var(--space-2);
  margin-top: var(--space-6);
  min-width: 160px;
}

@media print {
  .no-print,
  .site-header,
  .site-footer,
  .page-hero { display: none !important; }
  .certificate-sheet { box-shadow: none; border-width: 2px; margin-top: 0; }
  body { background: white; }
}

/* ---------- Checkout ---------- */
.checkout-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-6);
  align-items: start;
  padding: var(--space-8) 0 var(--space-10);
}
.order-summary {
  background: var(--navy-900);
  color: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  position: sticky;
  top: calc(var(--header-h) + 1.5rem);
}
.order-summary h2 {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid rgba(91, 168, 206, 0.2);
}
.order-line {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  font-size: 0.95rem;
  color: var(--sky-200);
}
.order-line--total {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid rgba(91, 168, 206, 0.2);
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--white);
}

/* ---------- Forum ---------- */
.forum-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
  flex-wrap: wrap;
}
.forum-list {
  background: var(--white);
  border: 1px solid var(--cloud-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.forum-thread-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-4);
  align-items: center;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--cloud-100);
  text-decoration: none;
  color: inherit;
  transition: background 0.2s;
}
.forum-thread-row:last-child { border-bottom: none; }
.forum-thread-row:hover { background: var(--cloud-50); color: inherit; }
.forum-thread-row h3 {
  font-size: 1.1rem;
  margin-bottom: 0.35rem;
}
.forum-thread-row__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-muted);
}
.forum-stats {
  display: flex;
  gap: var(--space-4);
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-muted);
}
.forum-stats strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--navy-800);
}
.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.2rem 0.45rem;
  border-radius: var(--radius);
  background: rgba(91, 168, 206, 0.15);
  color: var(--navy-700);
  margin-right: var(--space-2);
}
.tag--green { background: rgba(61, 154, 118, 0.15); color: var(--chart-700); }
.tag--amber { background: rgba(201, 146, 42, 0.15); color: #8a6418; }

.thread-post {
  background: var(--white);
  border: 1px solid var(--cloud-200);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin-bottom: var(--space-4);
}
.thread-post--op {
  border-color: rgba(61, 154, 118, 0.35);
  box-shadow: 0 0 0 1px rgba(61, 154, 118, 0.08);
}
.thread-post__head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}
.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--navy-700), var(--chart-600));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--white);
  flex-shrink: 0;
}
.thread-post__author {
  font-weight: 600;
  color: var(--navy-800);
  font-size: 0.95rem;
}
.thread-post__time {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-muted);
}
.thread-post__body p {
  color: var(--ink);
  margin-bottom: var(--space-3);
  line-height: 1.65;
}
.thread-post__body p:last-child { margin-bottom: 0; }
.reply-form {
  background: var(--cloud-100);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin-top: var(--space-5);
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--navy-950);
  color: var(--cloud-300);
  padding: var(--space-8) 0 var(--space-5);
  border-top: 1px solid rgba(91, 168, 206, 0.15);
  margin-top: auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}
.footer-brand .logo { margin-bottom: var(--space-3); }
.footer-brand p {
  font-size: 0.95rem;
  color: var(--cloud-300);
  max-width: 280px;
  line-height: 1.55;
}
.footer-grid > div h4 {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--sky-300);
  margin-bottom: var(--space-4);
}
.footer-grid > div a {
  display: block;
  color: var(--cloud-300);
  font-size: 0.95rem;
  margin-bottom: var(--space-2);
  transition: color 0.2s;
}
.footer-grid > div a:hover { color: var(--chart-400); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding-top: var(--space-5);
  border-top: 1px solid rgba(91, 168, 206, 0.1);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--cloud-300);
  opacity: 0.9;
}
.footer-bottom a { color: var(--sky-300); }
.footer-bottom a:hover { color: var(--chart-400); }

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Utility ---------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .feature-row,
  .feature-row--reverse { grid-template-columns: 1fr; direction: ltr; }
  .split-layout { grid-template-columns: 1fr; }
  .course-aside { position: static; }
  .dash-grid { grid-template-columns: 1fr; }
  .auth-layout { grid-template-columns: 1fr; }
  .auth-visual { min-height: 220px; padding: var(--space-6); }
  .lesson-layout { grid-template-columns: 1fr; }
  .lesson-sidebar {
    max-height: none;
    border-left: none;
    border-top: 1px solid rgba(91, 168, 206, 0.15);
  }
  .checkout-grid { grid-template-columns: 1fr; }
  .order-summary { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .cert-grid { grid-template-columns: 1fr; }
  .cta-band__inner { flex-direction: column; align-items: flex-start; }
  .nav { display: none; }
  .nav-toggle { display: flex; }
  .nav-mobile { display: flex; }
  .nav-mobile:not(.is-open) {
    max-height: 0;
    opacity: 0;
    padding-top: 0;
    padding-bottom: 0;
    border-bottom: none;
  }
}

@media (max-width: 720px) {
  .grid-3 { grid-template-columns: 1fr; }
  .form-row,
  .form-row--2 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero { min-height: auto; }
  .hero__content { padding: var(--space-8) 0 var(--space-10); margin-left: auto; }
  .certificate-sheet { padding: var(--space-5) var(--space-4); }
  .cert-signatures { flex-direction: column; align-items: center; gap: var(--space-5); }
  .stats-grid { grid-template-columns: 1fr; }
  .forum-thread-row { grid-template-columns: 1fr; }
  .forum-stats { justify-content: flex-start; }
  .cert-card { flex-direction: column; }
  .cert-card__preview { width: 100%; min-height: 120px; }
}