/* =========================================================
   AI Architect Mastery — Landing Site
   Dark theme, inspired by C008 presentations.
   Shared brand vars per /docs/rules/shared-visual-theme.md,
   adapted to a dark surface for the AAM brand.
   ========================================================= */

:root {
  /* Typography (per shared visual theme) */
  --font-heading: "Roboto Slab", Georgia, serif;
  --font-body: "Lato", "Helvetica Neue", Arial, sans-serif;

  /* Brand colors (shared) */
  --color-brand: #5A6B8A;          /* original brand accent */
  --color-brand-bright: #7B8FB5;   /* lighter for dark theme buttons/links */
  --color-heading-base: #A55A82;   /* original heading color */
  --color-heading: #C77BA5;        /* lifted for dark surfaces (AA contrast) */
  --color-highlight: #FFF9C4;

  /* Dark surfaces (AAM dark theme) */
  --color-page-bg: #0F1220;        /* near-black navy */
  --color-overlay: rgba(15, 18, 32, 0.86);
  --color-card-bg: rgba(28, 32, 50, 0.92);
  --color-card-border: rgba(199, 123, 165, 0.18);
  --color-card-bg-alt: rgba(22, 25, 40, 0.94);

  /* Text */
  --color-text: #E4E7F0;
  --color-text-muted: #B8BFD0;
  --color-text-strong: #FFFFFF;
  --color-link: #C9D2E8;
  --color-link-hover: #FFFFFF;

  /* Layout */
  --max-width: 1100px;
  --radius: 10px;
  --shadow-soft: 0 6px 24px rgba(0, 0, 0, 0.35);
}

/* ---------- Reset / base ---------- */

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 17px;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-page-bg);
  background-image:
    linear-gradient(var(--color-overlay), var(--color-overlay)),
    url("../assets/images/backgrounds/kangas-8.jpg");
  background-size: cover;
  background-position: center top;
  background-attachment: fixed;
  background-repeat: no-repeat;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

a {
  color: var(--color-link);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(199, 210, 232, 0.4);
  transition: color 0.15s ease;
}
a:hover, a:focus { color: var(--color-link-hover); text-decoration-color: currentColor; }

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--color-heading);
  line-height: 1.2;
  margin: 0 0 0.6em;
}
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); font-weight: 700; }
h2 { font-size: clamp(1.7rem, 3.5vw, 2.4rem); font-weight: 700; }
h3 { font-size: 1.35rem; font-weight: 600; }
h4 { font-size: 1.1rem; font-weight: 600; color: var(--color-text-strong); }

p { margin: 0 0 1em; }
strong { color: var(--color-text-strong); font-weight: 700; }
sup { font-size: 0.55em; vertical-align: super; }

code {
  font-family: "SFMono-Regular", Consolas, Menlo, monospace;
  font-size: 0.9em;
  background: rgba(255, 255, 255, 0.08);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--color-heading); color: #fff;
  padding: 8px 14px; z-index: 1000;
}
.skip-link:focus { left: 8px; top: 8px; }

/* ---------- Layout ---------- */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 72px 0;
}
.section-alt {
  background-color: rgba(15, 18, 32, 0.55);
  border-top: 1px solid rgba(199, 123, 165, 0.12);
  border-bottom: 1px solid rgba(199, 123, 165, 0.12);
}

.section-title { margin-bottom: 0.4em; }
.section-sub {
  color: var(--color-text-muted);
  max-width: 760px;
  margin-bottom: 2.2em;
  font-size: 1.05rem;
}
.subsection-title {
  margin-top: 3rem;
  font-size: 1.4rem;
}

.note.small { font-size: 0.85rem; color: var(--color-text-muted); }

/* ---------- Header / nav ---------- */

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10, 12, 22, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(199, 123, 165, 0.18);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 64px;
}
.brand {
  display: flex; align-items: center; gap: 12px;
  text-decoration: none; color: var(--color-text-strong);
  font-family: var(--font-heading); font-weight: 700; font-size: 1.05rem;
}
.brand:hover { color: #fff; }
.brand-logo { width: 36px; height: 36px; }
.brand-text { letter-spacing: 0.2px; }

.primary-nav ul {
  display: flex; gap: 28px; list-style: none; margin: 0; padding: 0;
}
.primary-nav a {
  color: var(--color-text); text-decoration: none; font-weight: 700;
  font-size: 0.95rem;
}
.primary-nav a:hover { color: var(--color-heading); }

.nav-toggle {
  display: none;
  background: transparent; border: 0; padding: 8px;
  cursor: pointer;
}
.nav-toggle span {
  display: block; width: 24px; height: 2px; background: var(--color-text);
  margin: 5px 0; transition: transform 0.2s ease;
}

@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .primary-nav {
    position: absolute; top: 64px; left: 0; right: 0;
    background: rgba(10, 12, 22, 0.97);
    border-bottom: 1px solid rgba(199, 123, 165, 0.18);
    max-height: 0; overflow: hidden; transition: max-height 0.25s ease;
  }
  .primary-nav.open { max-height: 320px; }
  .primary-nav ul {
    flex-direction: column; gap: 0; padding: 12px 24px 20px;
  }
  .primary-nav li { padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,0.06); }
  .primary-nav li:last-child { border-bottom: 0; }
}

/* ---------- Hero ---------- */

.section-hero {
  padding: 120px 0 90px;
  text-align: center;
}
.hero-title {
  margin-bottom: 0.2em;
  text-shadow: 0 2px 24px rgba(0,0,0,0.45);
}
.hero-tagline {
  font-family: var(--font-heading);
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  color: var(--color-text-strong);
  margin: 0 0 1.2em;
  letter-spacing: 0.5px;
}
.hero-lead {
  max-width: 760px; margin: 0 auto 2em;
  font-size: 1.15rem; color: var(--color-text);
}
.hero-cta {
  display: flex; gap: 14px; justify-content: center; flex-wrap: wrap;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  font-family: var(--font-body); font-weight: 700;
  padding: 14px 26px; border-radius: var(--radius);
  text-decoration: none; cursor: pointer; border: 2px solid transparent;
  transition: all 0.15s ease; font-size: 1rem;
}
.btn-primary {
  background: var(--color-brand-bright);
  color: #0F1220;
  border-color: var(--color-brand-bright);
}
.btn-primary:hover, .btn-primary:focus {
  background: #FFFFFF; border-color: #FFFFFF; color: #0F1220;
}
.btn-ghost {
  background: transparent;
  color: var(--color-text-strong);
  border-color: rgba(199, 210, 232, 0.55);
}
.btn-ghost:hover, .btn-ghost:focus {
  border-color: var(--color-heading); color: var(--color-heading);
}
.btn-small { padding: 9px 18px; font-size: 0.92rem; }

/* ---------- Video facade ---------- */

.video-wrap {
  max-width: 880px; margin: 0 auto;
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius);
  padding: 14px;
  box-shadow: var(--shadow-soft);
}
.video-facade {
  position: relative; display: block; width: 100%;
  aspect-ratio: 16 / 9;
  border: 0; padding: 0; cursor: pointer;
  border-radius: 6px; overflow: hidden;
  background: #000;
}
.video-facade-thumb {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, #1c2238 0%, #2a1c30 100%);
}
.video-facade-play {
  position: absolute; left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  width: 84px; height: 84px; border-radius: 50%;
  background: rgba(199, 123, 165, 0.92); color: #fff;
  display: grid; place-items: center;
  font-size: 1.8rem; padding-left: 6px;
  transition: transform 0.15s ease;
}
.video-facade:hover .video-facade-play { transform: translate(-50%, -50%) scale(1.08); }

.video-iframe {
  width: 100%; aspect-ratio: 16 / 9;
  border: 0; border-radius: 6px;
}

/* ---------- Methodology ---------- */

.method-flow {
  list-style: none; padding: 0; margin: 0 0 3rem;
  display: grid; gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.method-step {
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius);
  padding: 24px 22px;
  position: relative;
  box-shadow: var(--shadow-soft);
}
.method-step h3 {
  margin: 0.4em 0 0.4em;
  color: var(--color-heading);
}
.method-step p { margin: 0; color: var(--color-text-muted); font-size: 0.97rem; }
.method-step-num {
  font-family: var(--font-heading); font-weight: 700;
  font-size: 1.6rem; color: var(--color-brand-bright);
  letter-spacing: 1px;
}

.value-grid {
  list-style: none; padding: 0; margin: 0;
  display: grid; gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.value-grid li {
  padding: 18px 20px;
  background: var(--color-card-bg-alt);
  border-left: 3px solid var(--color-heading);
  border-radius: 6px;
}
.value-grid h4 { margin: 0 0 0.3em; color: var(--color-heading); font-family: var(--font-heading); }
.value-grid p { margin: 0; font-size: 0.95rem; color: var(--color-text-muted); }

/* ---------- Courses ---------- */

.course-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius);
  padding: 32px 30px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-soft);
}
.course-card-featured {
  border-color: rgba(199, 123, 165, 0.5);
  box-shadow: 0 8px 32px rgba(199, 123, 165, 0.12), var(--shadow-soft);
}
.course-tag {
  display: inline-block;
  background: var(--color-heading);
  color: #0F1220;
  font-weight: 700; font-size: 0.78rem;
  padding: 4px 12px; border-radius: 999px;
  text-transform: uppercase; letter-spacing: 0.6px;
  margin-bottom: 14px;
}
.course-card h3 { color: var(--color-heading); }
.course-card h4 { color: var(--color-text-strong); margin-bottom: 0.5em; }
.course-lead { font-size: 1.05rem; }
.course-bullets { padding-left: 1.2em; margin: 1em 0; }
.course-bullets li { margin-bottom: 0.4em; }
.course-meta {
  display: flex; flex-wrap: wrap; gap: 18px;
  font-size: 0.88rem; color: var(--color-text-muted);
  margin: 1.2em 0;
}
.course-cta {
  display: flex; gap: 12px; flex-wrap: wrap;
  margin-top: 1em;
}
.course-status {
  font-style: italic; color: var(--color-text-muted);
  margin: 0.6em 0 0;
  font-size: 0.92rem;
}
.course-grid {
  display: grid; gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.course-grid .course-card {
  margin-bottom: 0; padding: 24px 22px;
}

/* ---------- Audience two-col ---------- */

.two-col {
  display: grid; gap: 30px;
  grid-template-columns: 1fr 1fr;
}
@media (max-width: 768px) {
  .two-col { grid-template-columns: 1fr; }
}
.check-list, .x-list {
  list-style: none; padding: 0; margin: 0;
}
.check-list li, .x-list li {
  padding: 8px 0 8px 28px; position: relative;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.check-list li::before {
  content: "✓"; position: absolute; left: 0; top: 8px;
  color: var(--color-heading); font-weight: 700;
}
.x-list li::before {
  content: "✕"; position: absolute; left: 0; top: 8px;
  color: var(--color-brand-bright); font-weight: 700;
}

/* ---------- Instructor ---------- */

.instructor-inner {
  display: grid; gap: 32px;
  grid-template-columns: 220px 1fr;
  align-items: start;
}
@media (max-width: 768px) {
  .instructor-inner { grid-template-columns: 1fr; text-align: center; }
}
.instructor-photo {
  width: 200px; height: 200px; border-radius: 50%;
  background: linear-gradient(135deg, #2a1c30, #1c2238);
  border: 3px solid var(--color-heading);
  display: grid; place-items: center;
  font-family: var(--font-heading); font-weight: 700;
  font-size: 4rem; color: var(--color-heading);
  margin: 0 auto;
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}
.instructor-photo img {
  width: 100%; height: 100%;
  object-fit: cover; object-position: center top;
  display: block;
}
.instructor-role {
  font-family: var(--font-heading); color: var(--color-text-strong);
  font-size: 1.1rem; margin: -0.4em 0 1em;
}

/* ---------- MailerLite embed ---------- */

.loop-benefits {
  list-style: none; padding: 0; margin: 0 0 1.8em;
}
.loop-benefits li {
  padding: 6px 0 6px 26px; position: relative;
  color: var(--color-text-muted); font-size: 1rem;
}
.loop-benefits li::before {
  content: "→"; position: absolute; left: 0; top: 6px;
  color: var(--color-heading); font-weight: 700;
}

.mailerlite-wrap {
  max-width: 480px;
  margin: 0 0 2em;
}

/* ---------- Social / contact ---------- */

.social-list {
  list-style: none; padding: 0; margin: 1.5em 0 0;
  display: flex; gap: 14px; flex-wrap: wrap;
}
.social-list a {
  display: inline-block;
  padding: 12px 22px; border-radius: var(--radius);
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  color: var(--color-text-strong); text-decoration: none;
  font-weight: 700;
}
.social-list a:hover {
  border-color: var(--color-heading);
  color: var(--color-heading);
}

/* ---------- Footer ---------- */

.site-footer {
  padding: 28px 0;
  background: rgba(8, 10, 18, 0.95);
  border-top: 1px solid rgba(199, 123, 165, 0.18);
  color: var(--color-text-muted);
  font-size: 0.92rem;
  text-align: center;
}
.footer-meta { margin: 6px 0 0; font-size: 0.88rem; }

/* =========================================================
   Documentation subsite (gh-300/)
   ========================================================= */

.breadcrumb {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin: 0 0 8px;
}
.breadcrumb a { color: var(--color-text); text-decoration: none; }
.breadcrumb a:hover { color: var(--color-heading); }
.breadcrumb-sep { margin: 0 8px; opacity: 0.5; }

.docs-hero {
  padding: 80px 0 50px;
  text-align: center;
}
.docs-hero h1 { margin-bottom: 0.3em; }
.docs-hero .lead {
  font-size: 1.15rem; max-width: 760px;
  margin: 0 auto 1.5em; color: var(--color-text);
}
.docs-stats {
  display: flex; justify-content: center; gap: 28px; flex-wrap: wrap;
  margin: 2em 0 0;
}
.docs-stats .stat {
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius);
  padding: 18px 26px; min-width: 130px;
}
.docs-stats .stat-num {
  display: block; font-family: var(--font-heading);
  font-size: 1.8rem; font-weight: 700;
  color: var(--color-heading);
}
.docs-stats .stat-label {
  font-size: 0.85rem; color: var(--color-text-muted);
  text-transform: uppercase; letter-spacing: 0.6px;
}

.docs-grid {
  display: grid; gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  margin-top: 2rem;
}
.docs-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius);
  padding: 24px 24px;
  text-decoration: none;
  display: flex; flex-direction: column;
  transition: transform 0.15s ease, border-color 0.15s ease;
}
.docs-card:hover {
  transform: translateY(-3px);
  border-color: var(--color-heading);
  text-decoration: none;
}
.docs-card .module-id {
  font-family: var(--font-heading); font-weight: 700;
  font-size: 0.85rem; color: var(--color-brand-bright);
  letter-spacing: 1.5px; text-transform: uppercase;
  margin-bottom: 8px;
}
.docs-card h3 {
  color: var(--color-heading);
  margin: 0 0 0.5em;
}
.docs-card p {
  color: var(--color-text-muted);
  flex-grow: 1; margin-bottom: 1em;
}
.docs-card .weight {
  font-size: 0.85rem; color: var(--color-text-strong);
  font-weight: 700;
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 12px;
}
.docs-card .read-more {
  display: inline-block; margin-top: 10px;
  color: var(--color-heading); font-weight: 700;
  font-size: 0.92rem;
}

/* ---------- Article (module) layout ---------- */

.docs-article {
  padding: 50px 0 70px;
}
.docs-article .container { max-width: 880px; }

.module-meta {
  display: flex; flex-wrap: wrap; gap: 18px;
  background: var(--color-card-bg-alt);
  border-left: 3px solid var(--color-heading);
  padding: 14px 20px; border-radius: 6px;
  margin: 1em 0 2em;
  font-size: 0.92rem;
}
.module-meta strong { color: var(--color-text-strong); }

.docs-article h2 {
  margin-top: 2.2em;
  padding-top: 0.4em;
  border-top: 1px solid rgba(199, 123, 165, 0.18);
  font-size: 1.7rem;
}
.docs-article h2:first-of-type { border-top: 0; padding-top: 0; margin-top: 1em; }
.docs-article h3 {
  margin-top: 1.8em;
  color: var(--color-text-strong);
  font-family: var(--font-heading);
  font-size: 1.25rem;
}
.docs-article h4 {
  margin-top: 1.4em;
  color: var(--color-heading);
  font-size: 1.05rem;
}

.docs-article ul, .docs-article ol { padding-left: 1.4em; }
.docs-article li { margin-bottom: 0.4em; }
.docs-article li > ul { margin-top: 0.4em; }

.docs-article table {
  width: 100%; border-collapse: collapse;
  margin: 1.4em 0;
  background: var(--color-card-bg-alt);
  border-radius: 6px; overflow: hidden;
  font-size: 0.95rem;
}
.docs-article th, .docs-article td {
  padding: 10px 14px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  text-align: left; vertical-align: top;
}
.docs-article th {
  background: rgba(199, 123, 165, 0.18);
  color: var(--color-text-strong);
  font-family: var(--font-heading);
  font-weight: 700;
}
.docs-article tr:last-child td { border-bottom: 0; }

.callout {
  background: rgba(199, 123, 165, 0.08);
  border-left: 4px solid var(--color-heading);
  padding: 14px 18px; border-radius: 4px;
  margin: 1.4em 0;
}
.callout strong { color: var(--color-heading); }
.callout-warn {
  background: rgba(255, 220, 100, 0.08);
  border-left-color: #FFD66B;
}
.callout-warn strong { color: #FFD66B; }
.callout-tip {
  background: rgba(123, 143, 181, 0.10);
  border-left-color: var(--color-brand-bright);
}
.callout-tip strong { color: var(--color-brand-bright); }

.docs-article pre {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 6px;
  padding: 14px 16px;
  overflow-x: auto;
  font-size: 0.9rem;
  line-height: 1.5;
  margin: 1em 0;
}
.docs-article pre code {
  background: transparent; padding: 0;
  color: var(--color-text);
}
.docs-article code {
  background: rgba(255,255,255,0.08);
  color: #FFD66B;
}

.checklist {
  list-style: none; padding-left: 0;
}
.checklist li {
  padding: 6px 0 6px 28px; position: relative;
}
.checklist li::before {
  content: "✓"; position: absolute; left: 0;
  color: var(--color-heading); font-weight: 700;
}

.module-nav {
  display: flex; justify-content: space-between; gap: 14px;
  margin-top: 3em; padding-top: 1.5em;
  border-top: 1px solid rgba(199, 123, 165, 0.18);
  flex-wrap: wrap;
}
.module-nav a {
  flex: 1 1 200px;
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius);
  padding: 14px 18px;
  text-decoration: none;
  display: flex; flex-direction: column; gap: 4px;
}
.module-nav a:hover {
  border-color: var(--color-heading);
}
.module-nav .label {
  font-size: 0.8rem; color: var(--color-text-muted);
  text-transform: uppercase; letter-spacing: 0.6px;
}
.module-nav .title {
  color: var(--color-text-strong); font-weight: 700;
}
.module-nav .next { text-align: right; }

.docs-article hr {
  border: 0;
  border-top: 1px solid rgba(199, 123, 165, 0.18);
  margin: 2.4em 0;
}

.toc {
  background: var(--color-card-bg-alt);
  border-radius: var(--radius);
  padding: 18px 24px;
  margin: 1em 0 2em;
}
.toc h4 {
  margin: 0 0 0.6em;
  color: var(--color-heading);
  font-size: 0.95rem; text-transform: uppercase; letter-spacing: 1px;
}
.toc ol { margin: 0; padding-left: 1.4em; }
.toc li { margin-bottom: 0.3em; }
.toc a { color: var(--color-text); text-decoration: none; }
.toc a:hover { color: var(--color-heading); text-decoration: underline; }