/* KubeSpaces landing — editorial/Swiss, light, one accent. No JS. */

:root {
  --paper: #faf8f3;
  --ink: #16151a;
  --ink-soft: #4c4a55;
  --hairline: #d9d5cb;
  --accent: #3730a3;        /* deep indigo — actions & emphasis only */
  --accent-ink: #ffffff;
  --ok: #1a7f4e;
  --term-bg: #16151a;
  --term-ink: #e8e6ef;

  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, monospace;

  --text-base: clamp(1rem, 0.94rem + 0.3vw, 1.125rem);
  --text-h2: clamp(1.75rem, 1.2rem + 2.2vw, 2.75rem);
  --text-hero: clamp(2.6rem, 1.4rem + 5vw, 5rem);

  --space-section: clamp(4.5rem, 3rem + 6vw, 9rem);
  --edge: clamp(1.25rem, 4vw, 4rem);
  --measure: 62ch;
}

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

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
}

h1, h2, h3, .wordmark { font-family: var(--font-display); line-height: 1.08; }
a { color: inherit; }
code { font-family: var(--font-mono); font-size: 0.92em; }

/* ---------- header ---------- */

.site-header {
  border-bottom: 1px solid var(--hairline);
  padding: 1.1rem var(--edge);
  position: sticky; top: 0;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(8px);
  z-index: 10;
}
.site-header nav { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; }
.wordmark { font-weight: 700; font-size: 1.35rem; text-decoration: none; letter-spacing: -0.02em; }
.wordmark em { font-style: normal; color: var(--accent); }
.nav-links { display: flex; gap: clamp(0.9rem, 2.5vw, 2rem); align-items: baseline; }
.nav-links a { text-decoration: none; font-size: 0.95rem; color: var(--ink-soft); }
.nav-links a:hover, .nav-links a:focus-visible { color: var(--ink); text-decoration: underline; text-underline-offset: 4px; }
.nav-cta { color: var(--ink) !important; font-weight: 600; }
@media (max-width: 640px) { .nav-links a:not(.nav-cta) { display: none; } }

/* ---------- hero ---------- */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
  padding: var(--space-section) var(--edge);
  max-width: 76rem; margin-inline: auto;
}
@media (max-width: 900px) { .hero { grid-template-columns: 1fr; } }

.kicker {
  font-family: var(--font-mono);
  font-size: 0.8rem; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 1.2rem;
}
.hero h1 { font-size: var(--text-hero); letter-spacing: -0.03em; font-weight: 700; }
.hero .accent { color: var(--accent); }
.lede { max-width: var(--measure); margin-top: 1.4rem; font-size: 1.13em; color: var(--ink-soft); }
.hero-actions { display: flex; gap: 0.9rem; margin-top: 2.2rem; flex-wrap: wrap; }

.btn {
  display: inline-block; text-decoration: none;
  padding: 0.78rem 1.35rem; border-radius: 4px;
  font-weight: 600; font-size: 0.98rem;
  transition: transform 120ms ease, box-shadow 120ms ease, background 120ms ease;
}
.btn-primary {
  background: var(--accent); color: var(--accent-ink);
  font-family: var(--font-mono); font-weight: 500;
}
.btn-primary:hover, .btn-primary:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px color-mix(in srgb, var(--accent) 35%, transparent);
}
.btn-ghost { border: 1px solid var(--hairline); }
.btn-ghost:hover, .btn-ghost:focus-visible { border-color: var(--ink); }

/* terminal */
.hero-terminal {
  background: var(--term-bg); color: var(--term-ink);
  border-radius: 8px;
  box-shadow: 0 24px 60px -24px rgb(22 21 26 / 0.45);
  overflow: hidden;
  font-size: 0.82rem;
}
.term-bar {
  display: flex; align-items: center; gap: 6px;
  padding: 0.6rem 0.9rem;
  border-bottom: 1px solid rgb(255 255 255 / 0.08);
}
.term-bar span { width: 10px; height: 10px; border-radius: 50%; background: rgb(255 255 255 / 0.18); }
.term-bar p { margin-left: auto; font-family: var(--font-mono); font-size: 0.72rem; color: rgb(255 255 255 / 0.4); }
.hero-terminal pre { padding: 1.1rem 1.2rem 1.3rem; overflow-x: auto; line-height: 1.75; }
.hero-terminal .p { color: #8f8aa8; }
.hero-terminal .ok { color: #5ad48f; }
.hero-terminal .dim { color: rgb(255 255 255 / 0.42); }
.hero-terminal .str { color: #c8b8ff; }

/* ---------- sections ---------- */

main section:not(.hero) {
  max-width: 76rem; margin-inline: auto;
  padding: var(--space-section) var(--edge) 0;
}
main section:last-of-type { padding-bottom: var(--space-section); }

h2 {
  font-size: var(--text-h2); letter-spacing: -0.02em;
  border-top: 1px solid var(--hairline);
  padding-top: 1.2rem; margin-bottom: 2.5rem;
  display: flex; align-items: baseline; gap: 1rem;
}
.num { font-family: var(--font-mono); font-size: 0.55em; color: var(--accent); font-weight: 400; }

/* problem */
.cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(1.2rem, 3vw, 2.5rem); }
@media (max-width: 800px) { .cols { grid-template-columns: 1fr; } }
.col h3 { font-size: 1.15rem; margin-bottom: 0.6rem; }
.col p { color: var(--ink-soft); font-size: 0.98em; }
.col { padding: 1.4rem; border: 1px solid var(--hairline); border-radius: 6px; }
.col-answer { background: var(--ink); border-color: var(--ink); }
.col-answer h3 { color: var(--paper); }
.col-answer p { color: color-mix(in srgb, var(--paper) 78%, transparent); }

/* how */
.steps { list-style: none; counter-reset: step; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(1.2rem, 3vw, 2.5rem); }
@media (max-width: 800px) { .steps { grid-template-columns: 1fr; } }
.steps li { counter-increment: step; border-top: 3px solid var(--accent); padding-top: 1.1rem; }
.steps h3::before {
  content: counter(step, decimal-leading-zero) " ";
  font-family: var(--font-mono); color: var(--accent); font-size: 0.8em; font-weight: 400;
}
.steps h3 { font-size: 1.15rem; margin-bottom: 0.6rem; }
.steps p { color: var(--ink-soft); font-size: 0.98em; }

/* features */
.feature-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 0; border: 1px solid var(--hairline); border-radius: 6px; overflow: hidden;
}
@media (max-width: 1000px) { .feature-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .feature-grid { grid-template-columns: 1fr; } }
.feature-grid > div {
  padding: 1.5rem;
  border-right: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  transition: background 120ms ease;
}
.feature-grid > div:hover { background: color-mix(in srgb, var(--accent) 5%, var(--paper)); }
.feature-grid dt { font-family: var(--font-display); font-weight: 500; margin-bottom: 0.45rem; }
.feature-grid dd { color: var(--ink-soft); font-size: 0.93em; }

/* quickstart */
.shell {
  background: var(--term-bg); color: var(--term-ink);
  padding: 1.6rem 1.8rem; border-radius: 8px;
  overflow-x: auto; font-size: 0.9rem; line-height: 1.7;
}
.quickstart-note { margin-top: 1.4rem; color: var(--ink-soft); max-width: var(--measure); }
.quickstart-note a { color: var(--accent); font-weight: 600; text-decoration: none; }
.quickstart-note a:hover { text-decoration: underline; text-underline-offset: 4px; }

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--hairline);
  padding: 3rem var(--edge);
  max-width: 76rem; margin-inline: auto;
}
.foot-grid { display: flex; justify-content: space-between; gap: 2rem; flex-wrap: wrap; }
.foot-tag { color: var(--ink-soft); font-size: 0.95em; margin-top: 0.4rem; }
.site-footer nav { display: flex; gap: 1.6rem; flex-wrap: wrap; }
.site-footer nav a { color: var(--ink-soft); text-decoration: none; font-size: 0.95rem; }
.site-footer nav a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 4px; }
.foot-credit { margin-top: 2.4rem; font-size: 0.85rem; color: var(--ink-soft); }
.foot-credit a { color: inherit; }