/* Terminus SPA — deck aesthetics as a scrolling one-pager */

:root {
  --bg:     #0a0a0f;
  --bg-alt: #11111a;
  --bg-card:#15151f;
  --fg:     #F0EFF8;
  --muted:  #888780;
  --dim:    #4a4a5a;
  --border: #23232f;
  --border-bright: #34344a;

  --purple:     #7F77DD;
  --purple-glow:rgba(127,119,221,.12);
  --green:      #1D9E75;
  --amber:      #EF9F27;
  --pink:       #D4537E;

  --mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --sans: 'Inter', system-ui, sans-serif;
  --max-w: 1320px;
  --pad-x: clamp(20px, 5vw, 100px);
  --section-py: 96px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--purple); text-decoration: none; }
a:hover { color: var(--fg); }

/* ─── NAV ─────────────────────────────────────────────────────────────── */
.chrome-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 52px;
  background: rgba(17,17,26,.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 28px;
  gap: 16px;
  font-size: 14px;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.nav-dots { display: inline-flex; gap: 7px; }
.nav-dots span {
  width: 11px; height: 11px; border-radius: 50%;
  background: #2c2c3a; display: block;
}
.nav-dots span.r { background: #c74542; }
.nav-dots span.y { background: #d6a13a; }
.nav-dots span.g { background: #4ea84e; }

.nav-path { font-family: var(--mono); }
.nav-path .prompt { color: var(--purple); }
.nav-path .dir    { color: var(--fg); }

.nav-links {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 24px;
}
.nav-links a { color: var(--muted); font-size: 13px; transition: color 120ms; }
.nav-links a:hover { color: var(--fg); }

.nav-gh {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 14px;
  border: 1px solid var(--border-bright);
  border-radius: 999px;
  color: var(--fg) !important;
  font-size: 13px;
  transition: border-color 120ms, transform 120ms;
}
.nav-gh:hover { border-color: var(--purple); transform: translateY(-1px); }

.star-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 1px 7px;
  background: var(--purple-glow);
  border: 1px solid rgba(127,119,221,.3);
  border-radius: 5px;
  color: var(--purple);
  font-size: 11px;
  font-weight: 600;
}

/* ─── SHARED SECTION CHROME ───────────────────────────────────────────── */
.section {
  border-bottom: 1px solid var(--border);
  padding: var(--section-py) var(--pad-x);
}
.section:last-of-type { border-bottom: none; }

.inner { max-width: var(--max-w); margin: 0 auto; }

.slug {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--purple);
  letter-spacing: 0.04em;
  margin: 0 0 28px;
  font-weight: 500;
}
.slug .c { color: var(--dim); }

.section-title {
  font-size: clamp(32px, 4.5vw, 60px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--fg);
  margin: 0 0 56px;
}
.section-title em { color: var(--purple); font-style: normal; }

/* code token colours (used in pre blocks everywhere) */
.kw  { color: var(--purple); font-weight: 600; }
.typ { color: var(--amber); }
.str { color: var(--green); }
.num { color: var(--pink); }
.com { color: var(--dim); font-style: italic; }
.fn  { color: #b5a0e8; }
.pn  { color: var(--muted); }

/* ─── HERO ────────────────────────────────────────────────────────────── */
.hero {
  padding: 80px var(--pad-x) 80px;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -140px; left: 50%; transform: translateX(-50%);
  width: 800px; height: 500px;
  background: radial-gradient(ellipse at 50% 20%, rgba(127,119,221,.14) 0%, transparent 65%);
  pointer-events: none;
}

.hero-ascii {
  font-family: var(--mono);
  font-size: clamp(5px, 1.1vw, 13px);
  line-height: 1.05;
  font-weight: 800;
  color: var(--purple);
  white-space: pre;
  letter-spacing: 0;
  margin: 0 0 48px;
}

.hero-tag {
  font-size: clamp(18px, 2.2vw, 28px);
  color: var(--fg);
  font-weight: 400;
  margin: 0 0 40px;
  line-height: 1.3;
}
.hero-tag em { color: var(--purple); font-style: normal; font-weight: 600; }

.hero-cur {
  display: inline-block;
  width: 11px; height: 1.1em;
  background: var(--purple);
  margin-left: 5px;
  transform: translateY(3px);
  animation: blink 1.05s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero-pills {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 14px;
  border: 1px solid var(--border-bright);
  border-radius: 999px;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.06em;
}
.pill.p { color: var(--purple); border-color: rgba(127,119,221,.4); }
.pill.g { color: var(--green);  border-color: rgba(29,158,117,.4); }
.pill.star {
  color: var(--purple);
  border-color: rgba(127,119,221,.4);
  background: rgba(127,119,221,.07);
}

.hero-cta {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: 8px;
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 500;
  border: 1px solid transparent;
  transition: transform 120ms, background 120ms, border-color 120ms, color 120ms;
  cursor: pointer;
}
.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--purple);
  color: #fff;
}
.btn-primary:hover { background: #9890e8; color: #fff; }

.btn-ghost {
  background: transparent;
  color: var(--fg);
  border-color: var(--border-bright);
}
.btn-ghost:hover { border-color: var(--purple); color: var(--fg); }

/* ─── OVERVIEW 4-COL ──────────────────────────────────────────────────── */
.four-col {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 56px;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.four-col-item {
  padding: 32px 28px;
  border-right: 1px solid var(--border);
}
.four-col-item:last-child { border-right: none; }

.item-label {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 16px;
}
.item-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 8px;
}
.item-sub { font-size: 14px; color: var(--muted); line-height: 1.5; }

/* ─── FEAT ROWS (deck slide 02 style) ────────────────────────────────── */
.feat-rows { margin-top: 48px; }
.feat-row {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  align-items: baseline;
  padding: 20px 0;
  border-top: 1px solid var(--border);
}
.feat-row:last-child { border-bottom: 1px solid var(--border); }
.feat-row .k {
  color: var(--purple);
  font-weight: 600;
  font-size: 16px;
}
.feat-row .v {
  font-size: 16px;
  color: var(--fg);
  line-height: 1.5;
}
.feat-row .v .m { color: var(--muted); }

/* ─── CODE BLOCK ──────────────────────────────────────────────────────── */
.code-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-bright);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 40px 80px rgba(0,0,0,.5);
}
.code-bar {
  padding: 12px 18px;
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--muted);
}
.code-dots { display: flex; gap: 6px; }
.code-dots span { width: 10px; height: 10px; border-radius: 50%; }
.code-dots span:nth-child(1) { background: #c74542; }
.code-dots span:nth-child(2) { background: #d6a13a; }
.code-dots span:nth-child(3) { background: #4ea84e; }
.code-fname { color: var(--purple); }

.code-panel pre {
  margin: 0;
  padding: 28px 32px;
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.65;
  color: var(--fg);
  overflow-x: auto;
  white-space: pre;
}

/* ─── HELLO WORLD SECTION ─────────────────────────────────────────────── */
.hello-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 64px;
  align-items: center;
}
.hello-heading {
  font-size: clamp(28px, 3.5vw, 52px);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--fg);
  margin: 0 0 20px;
}
.hello-heading em { color: var(--purple); font-style: normal; }
.hello-sub {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.6;
  font-family: var(--sans);
}

/* ─── COMPONENT MODEL ─────────────────────────────────────────────────── */
.comp-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 56px;
  align-items: start;
  margin-top: 16px;
}

.comp-tree {
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.65;
  background: var(--bg-card);
  border: 1px solid var(--border-bright);
  border-radius: 10px;
  padding: 28px 32px;
  color: var(--fg);
  white-space: pre;
}
.comp-tree .l1 { color: var(--purple); font-weight: 700; }
.comp-tree .l3 { color: var(--muted); }
.comp-tree .b  { color: var(--dim); }

.comp-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.comp-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 22px 22px 24px;
  transition: border-color 150ms;
}
.comp-card:hover { border-color: var(--border-bright); }
.comp-card h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
}
.comp-card p {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.55;
  font-family: var(--sans);
}

/* ─── TABLE / PERFORMANCE (BIG STATS) ────────────────────────────────── */
.perf-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  margin-top: 16px;
  align-items: start;
}

.stats-block { display: flex; gap: 48px; margin-bottom: 56px; }

.stat .n {
  font-size: clamp(56px, 8vw, 100px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--fg);
  font-family: var(--mono);
}
.stat .lbl {
  font-size: 12px;
  color: var(--muted);
  margin-top: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.stat.purple .n { color: var(--purple); }
.stat.green  .n { color: var(--green); }

.built-in-label {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 16px;
}
.built-in-list {
  list-style: none;
  padding: 0; margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 15px;
  line-height: 1.5;
}
.built-in-list li::before {
  content: "›  ";
  color: var(--purple);
}

.kb-label {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 12px;
}
table.kb-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 14px;
}
table.kb-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}
table.kb-table td:first-child { color: var(--fg); width: 40%; }
table.kb-table td:last-child  { color: var(--muted); }

/* ─── ARCHITECTURE ────────────────────────────────────────────────────── */
.arch-title {
  font-size: clamp(28px, 3.5vw, 52px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--fg);
  margin: 0 0 56px;
}
.arch-title .arrow { color: var(--purple); }

.arch-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.arch-col {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 28px 24px;
}
.arch-col h4 {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--purple);
  font-weight: 600;
}
.arch-col h3 {
  margin: 0 0 16px;
  font-size: 22px;
  font-weight: 700;
  color: var(--fg);
}
.arch-col ul {
  margin: 0; padding: 0; list-style: none;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.65;
}
.arch-col ul li::before { content: "› "; color: var(--dim); }

.arch-rule {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
  font-size: 15px;
  color: var(--muted);
}
.arch-rule .p { color: var(--purple); }

/* ─── PATTERNS ────────────────────────────────────────────────────────── */
.patterns-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 16px;
}
table.pat-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 14px;
}
table.pat-table th {
  text-align: left;
  padding: 10px 16px;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--purple);
  border-bottom: 1px solid var(--border-bright);
}
table.pat-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}
table.pat-table td:first-child { color: var(--fg); width: 38%; }
table.pat-table td:last-child  { color: var(--muted); }

/* ─── INSTALL ─────────────────────────────────────────────────────────── */
.install-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 64px;
  align-items: start;
}
.install-heading {
  font-size: clamp(28px, 3.5vw, 52px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--fg);
  margin: 0 0 16px;
}
.install-heading em { color: var(--purple); font-style: normal; }
.install-sub {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 24px;
  font-family: var(--sans);
}

.install-blocks { display: flex; flex-direction: column; gap: 20px; }
.install-label {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 8px;
}

/* ─── ROADMAP ─────────────────────────────────────────────────────────── */
.rm-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  column-gap: 48px;
  row-gap: 0;
  margin-top: 16px;
}
.rm-item {
  display: flex;
  gap: 16px;
  align-items: baseline;
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
  font-size: 16px;
  line-height: 1.4;
}
.rm-item:nth-child(-n+2) { border-top: 1px solid var(--border); }
.rm-box {
  width: 18px; height: 18px;
  border: 2px solid var(--border-bright);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: var(--dim);
  flex-shrink: 0;
  margin-top: 3px;
}
.rm-text .name { color: var(--purple); font-weight: 600; }
.rm-text .desc { color: var(--muted); font-size: 13px; font-family: var(--sans); }

.rm-note {
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
  font-size: 15px;
  color: var(--muted);
}
.rm-note a { color: var(--purple); }

/* ─── FOOTER ──────────────────────────────────────────────────────────── */
.footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 28px var(--pad-x);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-brand {
  font-weight: 700;
  color: var(--purple);
  font-size: 14px;
}
.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-links a {
  color: var(--muted);
  font-size: 13px;
  transition: color 120ms;
}
.footer-links a:hover { color: var(--fg); }
.footer-meta { font-size: 12px; color: var(--dim); }

/* ─── RESPONSIVE ──────────────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .four-col { grid-template-columns: repeat(2, 1fr); }
  .four-col-item:nth-child(2) { border-right: none; }
  .four-col-item:nth-child(3) { border-top: 1px solid var(--border); }
  .four-col-item:nth-child(4) { border-top: 1px solid var(--border); border-right: none; }
  .hello-grid   { grid-template-columns: 1fr; gap: 40px; }
  .comp-grid    { grid-template-columns: 1fr; gap: 32px; }
  .perf-grid    { grid-template-columns: 1fr; gap: 48px; }
  .install-grid { grid-template-columns: 1fr; gap: 40px; }
  .patterns-grid { grid-template-columns: 1fr; gap: 0; }
}

@media (max-width: 720px) {
  :root { --section-py: 64px; }
  .arch-grid  { grid-template-columns: 1fr; }
  .comp-cards { grid-template-columns: 1fr; }
  .rm-grid    { grid-template-columns: 1fr; }
  .rm-item:nth-child(2) { border-top: none; }
  .four-col { grid-template-columns: 1fr; }
  .four-col-item { border-right: none; border-top: 1px solid var(--border); }
  .four-col-item:first-child { border-top: none; }
  .stats-block { gap: 32px; }
  .nav-links a:not(.nav-gh) { display: none; }
  .feat-row { grid-template-columns: 1fr; gap: 6px; }
}