@import '../shared/stack-vars.css';
@import '../shared/stack-layout.css';

:root {
  --mono: 'IBM Plex Mono', ui-monospace, monospace;
  --sans: 'Instrument Sans', system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: #0e0e10;
  color: #e8e6e3;
  line-height: 1.5;
}

.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; gap: 1rem;
  padding: 0.55rem 1rem; font-family: var(--mono); font-size: 0.62rem;
  background: rgba(14, 14, 16, 0.92); backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.nav a { color: #6b6966; text-decoration: none; }
.nav a:hover { color: #c4a574; }
.variants { margin-left: auto; color: #4a4844; }
.depth { color: #c4a574; font-weight: 600; }

.stack-mount {
  padding: var(--stack-nav) 1rem 0;
  max-width: 560px;
  margin: 0 auto;
}

/* Compact sticky card — click brings to front */
.layer:not(.layer-6) {
  margin-bottom: var(--stack-scroll-slot);
}

.layer {
  position: sticky;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 12px 36px rgba(0,0,0,0.5);
  cursor: pointer;
  transition: box-shadow 0.2s;
}

.layer.is-front {
  z-index: 100 !important;
  box-shadow: 0 16px 48px rgba(0,0,0,0.65);
}

.layer-0 { top: var(--stack-stick); z-index: 1; background: #1c1c20; }
.layer-1 { top: calc(var(--stack-stick) + var(--stack-step)); z-index: 2; background: #24242c; }
.layer-2 { top: calc(var(--stack-stick) + var(--stack-step) * 2); z-index: 3; background: #2c2c36; }
.layer-3 { top: calc(var(--stack-stick) + var(--stack-step) * 3); z-index: 4; background: #343440; }
.layer-4 { top: calc(var(--stack-stick) + var(--stack-step) * 4); z-index: 5; background: #3c3c4a; }
.layer-5 { top: calc(var(--stack-stick) + var(--stack-step) * 5); z-index: 6; background: #444454; }
.layer-6 { top: calc(var(--stack-stick) + var(--stack-step) * 6); z-index: 7; background: #4c4c5e; margin-bottom: 0; }

.layer-inner { padding: 0.95rem 1.15rem 1.05rem; }

.layer-head {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.35rem 0.65rem;
  margin-bottom: 0.65rem; padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  font-family: var(--mono); font-size: 0.6rem;
}

.layer-id {
  color: #c4a574; font-weight: 600; background: none; border: none;
  font-family: var(--mono); font-size: 0.6rem; cursor: pointer; padding: 0;
}
.layer-id:hover { text-decoration: underline; }
.layer-name { color: #6b6966; text-transform: uppercase; letter-spacing: 0.1em; }
.layer-link { margin-left: auto; color: #8b9cb3; text-decoration: none; font-size: 0.58rem; }
.layer h1 { font-size: 1.5rem; font-weight: 600; letter-spacing: -0.03em; }
.layer h2 { font-size: 1.05rem; font-weight: 600; margin-bottom: 0.3rem; }
.tagline { font-family: var(--mono); font-size: 0.65rem; color: #6b6966; margin-bottom: 0.4rem; }
.layer-copy { font-size: 0.9rem; color: #a8a6a1; }
.chips { display: flex; flex-wrap: wrap; gap: 0.3rem; margin: 0.5rem 0; }
.chips span {
  font-family: var(--mono); font-size: 0.55rem; padding: 0.15rem 0.4rem;
  background: rgba(196,165,116,0.1); color: #c4a574; border: 1px solid rgba(196,165,116,0.2); border-radius: 3px;
}
.avail { font-family: var(--mono); font-size: 0.62rem; color: #7eb87a; }
.contact-row { display: flex; flex-wrap: wrap; gap: 0.45rem; margin: 0.65rem 0 0.4rem; }
.btn {
  font-family: var(--mono); font-size: 0.68rem; padding: 0.45rem 0.75rem;
  background: #c4a574; color: #0e0e10; text-decoration: none; font-weight: 600; border-radius: 4px;
}
.btn-ghost { background: transparent; color: #c4a574; border: 1px solid rgba(196,165,116,0.35); }
.guarantees { font-family: var(--mono); font-size: 0.58rem; color: #5a5854; }
.site-foot {
  display: flex; justify-content: space-between;
  max-width: 560px; margin: 0 auto;
  padding: 0 1.5rem 2.5rem; font-family: var(--mono); font-size: 0.6rem; color: #4a4844;
}
.site-foot a { color: #4a4844; text-decoration: none; }
.stack-ruler {
  position: fixed; right: max(0.5rem, calc(50% - 300px)); top: 50%; transform: translateY(-50%);
  z-index: 50; display: flex; flex-direction: column; gap: 0.12rem;
  font-family: var(--mono); font-size: 0.48rem; color: #2a2a30;
}
.stack-ruler button {
  background: none; border: none; color: inherit; font: inherit; cursor: pointer; padding: 0.1rem 0; text-align: right;
}
.stack-ruler button:hover,
.stack-ruler button.active { color: #c4a574; }

@media (max-width: 700px) {
  :root { --stack-step: 1.5rem; }
  .variants { display: none; }
}