/* =========================================================================
   ASK — site layout layer

   This is a reference implementation of design-system-ASK. It consumes the
   canonical tokens (colors_and_type.css, vendored) and adds LAYOUT ONLY —
   no new colors, type choices, or scale. Per the tier model, this surface
   carries ASK's own Tier 3 (the logo-ASK wordmark + the ASK name) because
   it IS the ASK meta-brand front door; everything else is inherited
   Tier 1 (foundation) + Tier 2 (ASK design language).

   Source of truth: github.com/apexSolarKiss/design-system-ASK.
   ========================================================================= */

.shell {
  min-height: 100svh;
  box-sizing: border-box;
  max-width: 1120px;
  margin: 0 auto;
  padding: var(--space-9) var(--space-6);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-9);
}

/* ---------- Hero ---------- */
.hero { text-align: center; }

.wordmark { color: var(--ask-white); }            /* light-mode logo pairing = white */
.wordmark svg {
  width: min(460px, 72vw);
  height: auto;
  display: block;
  margin: 0 auto;
}
@media (prefers-color-scheme: dark) {
  .wordmark { color: var(--ask-lavender-ask); }   /* dark-mode pairing = lavender-ASK */
}

.tagline {
  font-family: var(--font-mono);
  font-weight: var(--fw-light);
  font-size: var(--fs-small);
  letter-spacing: var(--tracking-wide);
  color: var(--fg-2);
  margin: var(--space-6) 0 0 0;
}

/* ---------- Tier cards ---------- */
.tiers {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}
@media (max-width: 780px) { .tiers { grid-template-columns: 1fr; } }

.card {
  background: var(--surface-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--line-1);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-md);
  transition:
    transform var(--dur-2) var(--ease-out),
    box-shadow var(--dur-2) var(--ease-out),
    background var(--dur-2) var(--ease-out),
    border-color var(--dur-2) var(--ease-out);
}

.tier {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  min-height: 220px;
}
.tier:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  background: var(--surface-glass-2);
}

.tier-role { color: var(--fg-2); margin: 0; }

.tier-name {
  font-size: var(--fs-h3);
  font-weight: var(--fw-light);
  letter-spacing: var(--tracking-tight);
  margin: 0;
}
.tier-name a { border-bottom: none; }
.tier-name a:hover { opacity: 0.82; }

.tier-desc {
  font-size: var(--fs-caption);
  font-weight: var(--fw-regular);
  color: var(--fg-3);
  margin: 0;
  letter-spacing: var(--tracking-normal);
  text-transform: none;
}

.tier-links {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.chip {
  font-family: var(--font-mono);
  font-size: var(--fs-caption);
  font-weight: var(--fw-light);
  letter-spacing: var(--tracking-normal);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-pill);
  background: var(--surface-glass-2);
  border: 1px solid var(--line-2);
  color: var(--fg-1);
}
.chip:hover { border-bottom: 1px solid var(--line-2); border-color: currentColor; opacity: 0.92; }

/* ---------- Footer ---------- */
.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-5);
  font-family: var(--font-mono);
  font-size: var(--fs-caption);
  letter-spacing: var(--tracking-wide);
  color: var(--fg-2);
}
.footer a { color: var(--fg-2); border-bottom-color: var(--line-2); }
.footer a:hover { color: var(--fg-1); }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}