/* ============================================================
   Base tokens + 3-site themes
   ============================================================ */

:root, .theme-pickaclass {
  --bg: #ffffff;
  --fg: #0b1220;
  --fg-muted: #5b6677;
  --surface: #ffffff;
  --surface-muted: #f5f6f8;
  --border: #e5e7eb;
  --accent: #1d4ed8;
  --accent-fg: #ffffff;
  --accent-soft: rgba(29, 78, 216, 0.10);
  --shadow: 0 6px 20px rgba(11, 18, 32, 0.06);
  --radius: 10px;
  --serif: "Fraunces", Georgia, serif;
  --sans: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.theme-learnflat {
  --bg: #fafbfa;
  --fg: #0b1f1c;
  --fg-muted: #4a5f5a;
  --surface: #ffffff;
  --surface-muted: #f1f5f4;
  --border: #dfe6e3;
  --accent: #0f766e;
  --accent-fg: #ffffff;
  --accent-soft: rgba(15, 118, 110, 0.10);
}

.theme-walkself {
  --bg: #0b0e14;
  --fg: #ece9e2;
  --fg-muted: #8a8f9c;
  --surface: #13171f;
  --surface-muted: #1a1f2a;
  --border: #2a313f;
  --accent: #c9a96e;
  --accent-fg: #0b0e14;
  --accent-soft: rgba(201, 169, 110, 0.12);
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.5);
}

/* ============================================================
   Reset / base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; cursor: pointer; }
h1, h2, h3, h4 { margin: 0; line-height: 1.15; font-weight: 600; letter-spacing: -0.01em; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
hr { border: 0; border-top: 1px solid var(--border); margin: 0; }

::selection { background: var(--accent); color: var(--accent-fg); }

.container { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.serif { font-family: var(--serif); }
.muted { color: var(--fg-muted); }
.text-accent { color: var(--accent); }

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 40px; padding: 0 18px; border-radius: 8px;
  font-size: 14px; font-weight: 500; white-space: nowrap;
  border: 1px solid transparent; transition: opacity .15s, background .15s, border-color .15s;
}
.btn--primary { background: var(--accent); color: var(--accent-fg); }
.btn--primary:hover { opacity: 0.9; }
.btn--outline { background: transparent; color: var(--fg); border-color: var(--border); }
.btn--outline:hover { background: var(--surface-muted); }
.btn--ghost { background: transparent; color: var(--fg); }
.btn--ghost:hover { background: var(--surface-muted); }
.btn--icon { width: 40px; padding: 0; }
.btn--lg { height: 48px; padding: 0 24px; font-size: 15px; }

/* ============================================================
   Header / footer
   ============================================================ */
.site-header {
  position: sticky; top: 0; z-index: 30;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(140%) blur(8px);
  -webkit-backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--border);
}
.site-header__inner { display: flex; align-items: center; gap: 24px; height: 64px; }
.site-brand { display: flex; align-items: center; gap: 10px; font-weight: 600; letter-spacing: -0.01em; }
.site-brand__mark {
  display: grid; place-items: center; width: 32px; height: 32px;
  border-radius: 8px; background: var(--accent); color: var(--accent-fg);
  font-weight: 700;
}
.theme-walkself .site-brand__mark {
  background: transparent; border: 1px solid var(--border); color: var(--accent); border-radius: 999px;
}
.site-nav { display: none; gap: 24px; flex: 1; }
.site-nav__link { font-size: 14px; color: var(--fg-muted); }
.site-nav__link:hover { color: var(--fg); }
.site-actions { margin-left: auto; display: flex; align-items: center; gap: 8px; }
@media (min-width: 768px) { .site-nav { display: flex; } }

.site-footer { border-top: 1px solid var(--border); background: color-mix(in srgb, var(--surface-muted) 50%, transparent); padding: 40px 0 24px; margin-top: 80px; }
.site-footer__grid { display: grid; gap: 32px; grid-template-columns: 1fr; }
@media (min-width: 768px) { .site-footer__grid { grid-template-columns: 1.4fr 1fr 1fr 1fr; } }
.site-footer__name { font-weight: 600; }
.site-footer__tagline { margin-top: 6px; color: var(--fg-muted); font-size: 14px; }
.site-footer__small { margin-top: 14px; color: var(--fg-muted); font-size: 12px; }
.site-footer__title { font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--fg-muted); }
.site-footer__list { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; font-size: 14px; }
.site-footer__list a { color: var(--fg); opacity: 0.9; }
.site-footer__list a:hover { opacity: 1; }
.site-footer__copy { margin-top: 32px; font-size: 12px; color: var(--fg-muted); }

/* ============================================================
   Dev switcher
   ============================================================ */
.dev-switcher {
  position: fixed; right: 16px; bottom: 16px; z-index: 60;
  display: flex; align-items: center; gap: 4px; padding: 4px 6px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 999px;
  box-shadow: var(--shadow); font-size: 12px;
}
.dev-switcher__label { padding: 0 6px; color: var(--fg-muted); }
.dev-switcher__btn { padding: 4px 10px; border-radius: 999px; color: var(--fg); }
.dev-switcher__btn:hover { background: var(--surface-muted); }
.dev-switcher__btn.is-active { background: var(--accent); color: var(--accent-fg); }

/* ============================================================
   Generic layout pieces
   ============================================================ */
.badge {
  display: inline-flex; align-items: center; padding: 4px 10px;
  border: 1px solid var(--border); border-radius: 999px;
  font-size: 11px; font-weight: 500; color: var(--fg-muted);
}
.badge--accent { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 35%, transparent); }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }

/* Hero shared */
.hero { border-bottom: 1px solid var(--border); background: var(--surface); }
.hero__grid { display: grid; gap: 48px; padding: 64px 0; }
@media (min-width: 960px) { .hero__grid { grid-template-columns: 1.1fr 1fr; padding: 96px 0; } }
.hero__title { font-size: 40px; line-height: 1.05; letter-spacing: -0.02em; }
@media (min-width: 768px) { .hero__title { font-size: 52px; } }
.hero__lede { margin-top: 18px; font-size: 18px; color: var(--fg-muted); max-width: 36em; }
.hero__cta { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 12px; }
.hero__note { margin-top: 22px; font-size: 14px; color: var(--fg-muted); display: flex; align-items: center; gap: 8px; }

.section { padding: 56px 0; }
.section__title { font-size: 28px; letter-spacing: -0.01em; }
.section__lede { margin-top: 12px; color: var(--fg-muted); max-width: 56ch; }

/* Trust bar */
.trustbar { border-bottom: 1px solid var(--border); background: var(--bg); }
.trustbar__row { display: flex; flex-wrap: wrap; gap: 24px; justify-content: space-between; padding: 22px 0; font-size: 14px; color: var(--fg-muted); }
.trustbar strong { color: var(--fg); }

/* Course / Category grid */
.grid-cards { display: grid; gap: 16px; grid-template-columns: 1fr; margin-top: 28px; }
@media (min-width: 640px) { .grid-cards { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px) { .grid-cards { grid-template-columns: repeat(4, 1fr); } }
.course-card { overflow: hidden; }
.course-card__thumb { aspect-ratio: 16/9; background: linear-gradient(135deg, var(--accent-soft), color-mix(in srgb, var(--accent) 25%, transparent)); }
.course-card__body { padding: 16px; }
.course-card__category { font-size: 12px; color: var(--fg-muted); }
.course-card__title { margin-top: 6px; font-size: 16px; font-weight: 600; }
.course-card__by { margin-top: 4px; font-size: 12px; color: var(--fg-muted); }
.course-card__meta { margin-top: 10px; display: flex; gap: 12px; font-size: 12px; color: var(--fg-muted); align-items: center; }
.course-card__price { margin-top: 8px; display: flex; align-items: baseline; gap: 8px; }
.course-card__price strong { font-size: 18px; }
.course-card__price s { color: var(--fg-muted); font-size: 12px; }

/* Category card */
.cat-card { border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; background: var(--surface); transition: border-color .15s; }
.cat-card:hover { border-color: var(--accent); }
.cat-card__kicker { font-size: 12px; color: var(--fg-muted); }
.cat-card__title { margin-top: 4px; font-size: 18px; font-weight: 500; }
.cat-card__count { margin-top: 10px; font-size: 12px; color: var(--fg-muted); }
.grid-3 { display: grid; gap: 16px; grid-template-columns: 1fr; }
@media (min-width: 640px) { .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px) { .grid-3 { grid-template-columns: repeat(3, 1fr); } }

/* Price teaser (pickaclass) */
.price-teaser { width: 100%; max-width: 420px; background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 28px; box-shadow: var(--shadow); }
.price-teaser__kicker { font-size: 11px; text-transform: uppercase; letter-spacing: 0.18em; color: var(--fg-muted); }
.price-teaser__price { margin-top: 8px; display: flex; align-items: baseline; gap: 12px; }
.price-teaser__price b { font-size: 48px; font-weight: 600; letter-spacing: -0.02em; }
.price-teaser__price s { font-size: 18px; color: var(--fg-muted); }
.price-teaser__note { color: var(--fg-muted); font-size: 14px; }
.price-teaser ul { margin-top: 10px; }
.price-teaser li { display: flex; justify-content: space-between; font-size: 14px; padding: 4px 0; color: var(--fg-muted); }
.price-teaser li strong { color: var(--fg); font-weight: 500; }

/* Steps */
.steps { display: grid; gap: 20px; grid-template-columns: 1fr; margin-top: 28px; }
@media (min-width: 768px) { .steps { grid-template-columns: repeat(3, 1fr); } }
.step { border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.step__n { font-family: ui-monospace, monospace; font-size: 12px; color: var(--fg-muted); }
.step__t { margin-top: 12px; font-size: 17px; font-weight: 500; }
.step__d { margin-top: 8px; font-size: 14px; color: var(--fg-muted); }

/* Certificate teaser */
.cert { width: 100%; max-width: 460px; padding: 28px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg); font-family: var(--serif); }
.cert__kicker { font-size: 11px; text-transform: uppercase; letter-spacing: 0.2em; color: var(--fg-muted); }
.cert__h1 { margin-top: 16px; font-size: 22px; font-weight: 500; }
.cert__skills { margin-top: 10px; font-size: 14px; }
.cert__skills li { padding: 3px 0; }
.cert__meta { margin-top: 16px; font-size: 12px; color: var(--fg-muted); }

/* LearnFlat path teaser */
.path-teaser { width: 100%; max-width: 460px; background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 24px; box-shadow: var(--shadow); }
.path-teaser__kicker { font-size: 11px; text-transform: uppercase; letter-spacing: 0.18em; color: var(--fg-muted); }
.path-teaser__title { margin-top: 8px; font-family: var(--serif); font-size: 22px; }
.path-row { display: grid; grid-template-columns: 64px 1fr 40px; gap: 12px; align-items: center; margin-top: 14px; }
.path-row__w { font-family: ui-monospace, monospace; font-size: 12px; color: var(--fg-muted); }
.path-row__t { font-size: 14px; }
.path-row__bar { margin-top: 6px; height: 6px; background: var(--surface-muted); border-radius: 999px; overflow: hidden; }
.path-row__bar > i { display: block; height: 100%; background: var(--accent); }
.path-row__pct { font-size: 12px; color: var(--fg-muted); text-align: right; }

.coach { width: 100%; max-width: 460px; padding: 20px; border: 1px solid var(--border); border-radius: 16px; background: var(--bg); box-shadow: var(--shadow); }
.coach__head { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--fg-muted); }
.coach__msg { padding: 12px; border-radius: 10px; background: var(--surface-muted); font-size: 14px; margin-top: 12px; }
.coach__msg--user { background: var(--surface-muted); }
.coach__msg--coach { background: var(--accent-soft); border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent); }

/* WalkSelf hero — code mockup */
.code-card { width: 100%; max-width: 420px; background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 28px; box-shadow: var(--shadow); font-family: var(--serif); }
.code-card__kicker { font-size: 11px; text-transform: uppercase; letter-spacing: 0.22em; color: var(--fg-muted); }
.code-card__code { margin-top: 10px; font-family: ui-monospace, monospace; font-size: 32px; letter-spacing: 0.32em; color: var(--accent); }
.code-card__sub { font-size: 12px; color: var(--fg-muted); margin-top: 4px; }
.align-row { margin-top: 8px; }
.align-row.is-muted { opacity: 0.55; }
.align-row__top { display: flex; justify-content: space-between; align-items: baseline; font-size: 12px; }
.align-row__label { font-family: var(--sans); }
.align-row__pct { font-family: ui-monospace, monospace; color: var(--accent); }
.align-row__bar { margin-top: 4px; height: 4px; background: var(--surface-muted); border-radius: 999px; overflow: hidden; }
.align-row__bar > i { display: block; height: 100%; background: var(--accent); }

/* Three inputs (walkself) */
.input-card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 26px; }
.input-card__mark { display: grid; place-items: center; width: 40px; height: 40px; border: 1px solid var(--border); border-radius: 999px; color: var(--accent); }
.input-card__title { margin-top: 14px; font-family: var(--serif); font-size: 20px; }
.input-card__kicker { margin-top: 4px; font-size: 13px; color: var(--fg-muted); }
.input-card__body { margin-top: 12px; font-size: 14px; color: var(--fg); opacity: 0.92; }

/* Practice cards */
.practice { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 22px; }
.practice__kicker { font-size: 11px; text-transform: uppercase; letter-spacing: 0.1em; color: var(--fg-muted); }
.practice__title { margin-top: 6px; font-family: var(--serif); font-size: 18px; }
.practice__why { margin-top: 8px; font-size: 14px; color: var(--fg-muted); }
.practice__foot { margin-top: 16px; display: flex; justify-content: space-between; align-items: center; font-size: 13px; color: var(--fg-muted); }
.practice__price { font-weight: 600; color: var(--accent); }

/* WalkSelf hero atmosphere */
.theme-walkself .hero { position: relative; overflow: hidden; background: var(--bg); }
.theme-walkself .hero::before {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(circle at 30% 20%, rgba(201, 169, 110, 0.16), transparent 45%),
    radial-gradient(circle at 70% 60%, rgba(201, 169, 110, 0.08), transparent 50%);
}
.theme-walkself .hero > * { position: relative; z-index: 1; }
.theme-walkself .badge--accent { border-color: color-mix(in srgb, var(--accent) 40%, transparent); }