/* ============================================================
   Preferred Systems — Website UI kit scaffolding
   Kit-specific layout CSS (not part of the DS token layer).
   Consumes DS tokens via var(--*) from styles.css.
   ============================================================ */

.site { min-height: 100%; background: var(--surface-page); }

/* ---- Top bar ---- */
.topbar {
  background: var(--slate-900); color: #fff;
  font-size: var(--fs-sm);
}
.topbar__inner {
  max-width: var(--container-xl); margin: 0 auto; padding: 7px var(--gutter);
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.topbar a { color: rgba(255,255,255,.82); display: inline-flex; align-items: center; gap: 6px; }
.topbar a:hover { color: #fff; text-decoration: none; }
.topbar__contact { display: flex; gap: 20px; }

/* ---- Header / nav ---- */
.header {
  position: sticky; top: 0; z-index: 40;
  background: rgba(255,255,255,.92); backdrop-filter: saturate(1.1) blur(8px);
  border-bottom: 1px solid var(--border-subtle);
}
.header__inner {
  max-width: var(--container-xl); margin: 0 auto; padding: 12px var(--gutter);
  display: flex; align-items: center; gap: 28px;
}
.header__logo { height: 40px; display: block; cursor: pointer; }
.nav { display: flex; align-items: center; gap: 4px; margin-left: 8px; }
.nav a {
  color: var(--text-body); font-weight: var(--fw-semibold); font-size: var(--fs-sm);
  padding: 8px 12px; border-radius: var(--radius-sm); display: inline-flex; align-items: center; gap: 5px;
}
.nav a:hover { color: var(--text-brand); background: var(--green-50); text-decoration: none; }
.nav a.is-active { color: var(--text-brand); }
.header__actions { margin-left: auto; display: flex; align-items: center; gap: 10px; }

/* ---- Generic layout ---- */
.container { max-width: var(--container-xl); margin: 0 auto; padding: 0 var(--gutter); }
.container--narrow { max-width: var(--container-lg); }
.section { padding: var(--space-16) 0; }
.section--tight { padding: var(--space-12) 0; }

/* ---- Hero ---- */
.hero { position: relative; overflow: hidden; background: var(--slate-900); color: #fff; }
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(90% 120% at 92% 0%, rgba(46,128,73,.55), transparent 55%),
    linear-gradient(120deg, #10231a 0%, #0f1a20 60%);
}
.hero__inner {
  position: relative; max-width: var(--container-xl); margin: 0 auto;
  padding: var(--space-20) var(--gutter) var(--space-16);
  display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center;
}
.hero__eyebrow { color: var(--orange-400); font-weight: 700; letter-spacing: var(--ls-eyebrow); text-transform: uppercase; font-size: var(--fs-2xs); }
.hero h1 { color: #fff; font-size: var(--fs-display); letter-spacing: var(--ls-tight); margin: 14px 0 16px; }
.hero__lede { color: rgba(255,255,255,.78); font-size: var(--fs-lg); max-width: 40ch; margin-bottom: 26px; }
.hero__cta { display: flex; gap: 12px; flex-wrap: wrap; }
.hero__stats { display: flex; gap: 34px; margin-top: 40px; }
.hero__stats .n { font-family: var(--font-display); font-weight: 800; font-size: 30px; color: #fff; letter-spacing: -.02em; }
.hero__stats .n b { color: var(--orange-400); }
.hero__stats .l { font-size: var(--fs-xs); color: rgba(255,255,255,.6); margin-top: 2px; }
.hero__card {
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.14);
  border-radius: var(--radius-xl); padding: 22px; backdrop-filter: blur(6px);
}
.hero__card h4 { color: #fff; font-size: var(--fs-h5); margin: 0 0 4px; }
.hero__card p { color: rgba(255,255,255,.66); font-size: var(--fs-sm); margin: 0 0 16px; }

/* ---- Section heading ---- */
.sechead { text-align: center; max-width: 60ch; margin: 0 auto var(--space-10); }
.sechead .psi-eyebrow { display: block; margin-bottom: 8px; }
.sechead h2 { margin: 0 0 10px; }
.sechead p { color: var(--text-muted); font-size: var(--fs-lg); margin: 0; }

/* ---- Category grid ---- */
.catgrid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.cat {
  background: var(--surface-card); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); padding: 20px; cursor: pointer;
  transition: box-shadow var(--dur-base) var(--ease-standard), transform var(--dur-base) var(--ease-standard), border-color var(--dur-base);
  display: flex; flex-direction: column; gap: 10px;
}
.cat:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); border-color: var(--green-200); }
.cat__ic {
  width: 44px; height: 44px; border-radius: var(--radius-md);
  background: var(--green-50); color: var(--green-700);
  display: flex; align-items: center; justify-content: center;
}
.cat h4 { margin: 0; font-size: var(--fs-h5); }
.cat p { margin: 0; font-size: var(--fs-sm); color: var(--text-muted); }
.cat__count { margin-top: auto; font-size: var(--fs-xs); font-weight: 700; color: var(--text-brand); display: flex; align-items: center; gap: 4px; }

/* ---- Course grid ---- */
.coursegrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }

/* ---- Catalog layout ---- */
.catalog { display: grid; grid-template-columns: 244px 1fr; gap: 32px; align-items: start; }
.filters { position: sticky; top: 84px; display: flex; flex-direction: column; gap: 22px; }
.filters h5 { margin: 0 0 10px; font-size: var(--fs-sm); text-transform: uppercase; letter-spacing: .08em; color: var(--text-muted); }
.filters__group { border-bottom: 1px solid var(--border-subtle); padding-bottom: 18px; display: flex; flex-direction: column; gap: 10px; }
.catalog__head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; gap: 16px; }
.catalog__count { font-size: var(--fs-sm); color: var(--text-muted); }

/* ---- Course detail ---- */
.detail { display: grid; grid-template-columns: 1fr 340px; gap: 40px; align-items: start; }
.detail__title { font-size: var(--fs-h1); margin: 12px 0 12px; }
.detail__meta { display: flex; flex-wrap: wrap; gap: 8px 20px; color: var(--text-muted); font-size: var(--fs-sm); margin-bottom: 24px; }
.detail__meta span { display: inline-flex; align-items: center; gap: 6px; }
.detail__meta b { color: var(--text-body); }
.detail__body h3 { margin-top: 32px; }
.detail__body ul { padding-left: 0; list-style: none; display: flex; flex-direction: column; gap: 10px; }
.detail__body li { display: flex; gap: 10px; font-size: var(--fs-body); color: var(--text-body); }
.detail__body li svg { color: var(--green-600); flex-shrink: 0; margin-top: 2px; }
.enroll { position: sticky; top: 84px; }
.enroll__price { font-family: var(--font-display); font-weight: 800; font-size: 40px; color: var(--text-strong); letter-spacing: -.02em; }
.enroll__row { display: flex; align-items: center; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid var(--border-subtle); font-size: var(--fs-sm); }
.enroll__row b { color: var(--text-strong); }

/* ---- Dashboard ---- */
.dash { display: grid; grid-template-columns: 220px 1fr; gap: 32px; align-items: start; }
.dashnav { display: flex; flex-direction: column; gap: 2px; }
.dashnav a { padding: 10px 12px; border-radius: var(--radius-sm); font-weight: 600; font-size: var(--fs-sm); color: var(--text-body); display: flex; align-items: center; gap: 10px; }
.dashnav a:hover { background: var(--slate-100); text-decoration: none; }
.dashnav a.is-active { background: var(--green-50); color: var(--text-brand); }
.dashcards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 28px; }
.enrolled { display: flex; flex-direction: column; gap: 14px; }
.enrolled__item { display: grid; grid-template-columns: 64px 1fr auto; gap: 16px; align-items: center; padding: 16px; }
.enrolled__thumb { width: 64px; height: 64px; border-radius: var(--radius-md); background: linear-gradient(135deg, var(--green-600), var(--green-800)); display: flex; align-items: center; justify-content: center; color: #fff; }
.enrolled__meta { font-size: var(--fs-xs); color: var(--text-muted); }

/* ---- Footer ---- */
.footer { background: var(--slate-900); color: rgba(255,255,255,.7); margin-top: var(--space-16); }
.footer__inner { max-width: var(--container-xl); margin: 0 auto; padding: var(--space-16) var(--gutter) var(--space-10); display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; }
.footer h5 { color: #fff; font-size: var(--fs-sm); text-transform: uppercase; letter-spacing: .08em; margin: 0 0 14px; }
.footer a { color: rgba(255,255,255,.7); display: block; padding: 5px 0; font-size: var(--fs-sm); }
.footer a:hover { color: #fff; text-decoration: none; }
.footer__logo { background: #fff; display: inline-block; padding: 12px 16px; border-radius: var(--radius-md); margin-bottom: 16px; }
.footer__logo img { height: 34px; display: block; }
.footer__brand p { font-size: var(--fs-sm); max-width: 34ch; }
.footer__bar { border-top: 1px solid rgba(255,255,255,.12); }
.footer__bar-inner { max-width: var(--container-xl); margin: 0 auto; padding: 18px var(--gutter); display: flex; justify-content: space-between; font-size: var(--fs-xs); color: rgba(255,255,255,.5); }

@media (max-width: 900px) {
  .hero__inner, .catalog, .detail, .dash { grid-template-columns: 1fr; }
  .catgrid, .coursegrid, .dashcards { grid-template-columns: repeat(2, 1fr); }
  .filters, .enroll { position: static; }
}