/* ==========================================================================
   k8sforfun.com — main stylesheet
   Dark (OLED) theme · Kubernetes blue #326ce5 · action green #22c55e
   ========================================================================== */

/* ---------- Font (self-hosted, variable) ---------- */
@font-face {
  font-family: "Inter";
  src: url("/assets/fonts/inter-var-latin.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193,
    U+2212, U+2215, U+FEFF, U+FFFD;
}

/* ---------- Design tokens ---------- */
:root {
  /* color */
  --bg: #070b14;
  --bg-raised: #0c1322;
  --surface: #0f1729;
  --surface-2: #131d33;
  --border: rgba(148, 163, 184, 0.14);
  --border-strong: rgba(148, 163, 184, 0.28);
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --text-faint: #64748b;
  --brand: #326ce5;          /* Kubernetes blue */
  --brand-soft: #8ab4ff;     /* readable on dark */
  --accent: #22c55e;         /* CTA green */
  --accent-hover: #4ade80;
  --on-accent: #04150a;
  --amber: #fbbf24;
  --red: #f87171;

  /* type */
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", Menlo, Consolas,
    "Liberation Mono", monospace;

  /* rhythm */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;

  /* shape & depth */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1.125rem;
  --radius-pill: 999px;
  --shadow-card: 0 1px 0 rgba(255, 255, 255, 0.03) inset, 0 10px 30px rgba(2, 6, 17, 0.5);
  --glow-brand: 0 0 80px rgba(50, 108, 229, 0.18);

  /* motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 160ms;
  --dur-med: 260ms;

  color-scheme: dark;
}

/* ---------- Reset (minimal) ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

body,
h1, h2, h3, p, ul, figure, table, pre {
  margin: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--bg);
  min-height: 100dvh;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--brand-soft);
}

ul {
  padding: 0;
  list-style: none;
}

/* ---------- A11y helpers ---------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -100%;
  z-index: 100;
  padding: var(--space-2) var(--space-4);
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: top var(--dur-fast) ease-out;
}

.skip-link:focus {
  top: var(--space-4);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: 72rem;
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

.section {
  padding-block: clamp(3.5rem, 9vw, 6.5rem);
}

.section--tight {
  padding-block: clamp(1.5rem, 4vw, 2.5rem);
}

.section__head {
  max-width: 42rem;
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
}

.section__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-3);
}

.section__title {
  font-size: clamp(1.625rem, 3.5vw, 2.375rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  text-wrap: balance;
}

.section__sub {
  margin-top: var(--space-4);
  color: var(--text-muted);
  font-size: 1.0625rem;
  max-width: 38rem;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 2.75rem; /* 44px touch target */
  padding: 0.625rem 1.375rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--dur-fast) ease-out,
    border-color var(--dur-fast) ease-out,
    color var(--dur-fast) ease-out,
    transform var(--dur-fast) ease-out;
}

.btn .icon {
  width: 1.125rem;
  height: 1.125rem;
  flex: none;
}

.btn:active {
  transform: scale(0.98);
}

.btn--primary {
  background: var(--accent);
  color: var(--on-accent);
}

.btn--primary:hover {
  background: var(--accent-hover);
}

.btn--ghost {
  border-color: var(--border-strong);
  color: var(--text);
  background: transparent;
}

.btn--ghost:hover {
  border-color: var(--brand-soft);
  color: var(--brand-soft);
}

.btn--sm {
  min-height: 2.5rem;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn--lg {
  min-height: 3.25rem;
  padding: 0.875rem 1.75rem;
  font-size: 1.0625rem;
  border-radius: var(--radius-lg);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(7, 11, 20, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  min-height: 4rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--text);
  margin-right: auto;
}

.brand__mark {
  width: 1.75rem;
  height: 1.75rem;
  flex: none;
}

.brand__mark--sm {
  width: 1.375rem;
  height: 1.375rem;
}

.brand__word {
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.brand__word em {
  font-style: normal;
  color: var(--accent);
}

.site-nav {
  display: none;
  gap: var(--space-6);
}

.site-nav__link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
  padding: var(--space-2) 0;
  transition: color var(--dur-fast) ease-out;
}

.site-nav__link:hover {
  color: var(--text);
}

@media (min-width: 40rem) {
  .site-nav {
    display: flex;
  }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(4rem, 10vw, 7.5rem) clamp(3rem, 8vw, 6rem);
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(42rem 26rem at 18% -10%, rgba(50, 108, 229, 0.16), transparent 60%),
    radial-gradient(36rem 24rem at 92% 8%, rgba(34, 197, 94, 0.1), transparent 60%),
    linear-gradient(rgba(148, 163, 184, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.045) 1px, transparent 1px);
  background-size: auto, auto, 44px 44px, 44px 44px;
  mask-image: linear-gradient(to bottom, black 55%, transparent);
  -webkit-mask-image: linear-gradient(to bottom, black 55%, transparent);
}

.hero__inner {
  display: grid;
  gap: clamp(2.5rem, 6vw, 4rem);
  align-items: center;
}

@media (min-width: 60rem) {
  .hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.375rem 0.875rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-pill);
  background: rgba(15, 23, 41, 0.7);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.badge__dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px rgba(34, 197, 94, 0.9);
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.hero__title {
  margin-top: var(--space-6);
  font-size: clamp(2.5rem, 6.5vw, 4.25rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.04;
}

.hero__title-accent {
  background: linear-gradient(92deg, var(--brand-soft), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__sub {
  margin-top: var(--space-6);
  font-size: clamp(1.0625rem, 1.6vw, 1.1875rem);
  color: var(--text-muted);
  max-width: 34rem;
}

.hero__actions {
  margin-top: var(--space-8);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.hero__note {
  margin-top: var(--space-4);
  font-size: 0.875rem;
  color: var(--text-faint);
}

/* ---------- Terminal ---------- */
.terminal {
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, #0b1120, #0a0f1c);
  box-shadow: var(--shadow-card), var(--glow-brand);
  overflow: hidden;
}

.terminal__bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  background: rgba(19, 29, 51, 0.6);
}

.terminal__dot {
  width: 0.6875rem;
  height: 0.6875rem;
  border-radius: 50%;
  flex: none;
}

.terminal__dot--r { background: #f87171; }
.terminal__dot--y { background: #fbbf24; }
.terminal__dot--g { background: #34d399; }

.terminal__title {
  margin-left: var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.terminal__body {
  padding: 1.125rem 1.25rem 1.375rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.75;
  color: #cbd5e1;
  overflow-x: auto;
  min-height: 18rem;
}

.t-line {
  display: block;
  white-space: pre;
}

.t-line[data-type="cmd"] {
  color: #e2e8f0;
  font-weight: 500;
}

.t-prompt {
  color: var(--accent);
  font-weight: 600;
}

.t-ok {
  color: var(--accent);
}

.terminal__caret {
  display: inline-block;
  width: 0.55em;
  height: 1.1em;
  margin-left: 2px;
  vertical-align: text-bottom;
  background: var(--accent);
  animation: blink 1.1s steps(1) infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* ---------- Bento grid ---------- */
.bento {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 40rem) {
  .bento {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 60rem) {
  .bento {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
  }
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding: clamp(1.25rem, 3vw, 1.75rem);
  background: linear-gradient(180deg, var(--surface), var(--bg-raised));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: border-color var(--dur-med) ease-out, transform var(--dur-med) var(--ease-out);
}

.card:hover {
  border-color: rgba(50, 108, 229, 0.55);
  transform: translateY(-3px);
}

.card--wide {
  gap: var(--space-6);
}

@media (min-width: 40rem) {
  .card--wide {
    grid-column: span 2;
    flex-direction: row;
    align-items: center;
  }

  .card--wide .card__body {
    flex: 1 1 55%;
  }

  .card--wide .card__visual {
    flex: 1 1 45%;
    min-width: 0;
  }
}

.card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-md);
  background: rgba(50, 108, 229, 0.14);
  border: 1px solid rgba(50, 108, 229, 0.3);
  color: var(--brand-soft);
  margin-bottom: var(--space-2);
}

.card__icon svg {
  width: 1.375rem;
  height: 1.375rem;
}

.card__title {
  font-size: 1.125rem;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.card__text {
  margin-top: var(--space-2);
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.card__body .card__icon {
  margin-bottom: var(--space-2);
}

.code-block {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: #cbd5e1;
  background: #0a0f1c;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1rem 1.125rem;
  overflow-x: auto;
}

.y-key {
  color: var(--brand-soft);
}

/* ---------- Status table ---------- */
.status-panel {
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, #0b1120, #0a0f1c);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.status-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-variant-numeric: tabular-nums;
}

.status-table thead th {
  text-align: left;
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-faint);
  padding: 0.875rem 1.25rem;
  border-bottom: 1px solid var(--border);
}

.status-table tbody th,
.status-table tbody td {
  text-align: left;
  font-weight: 400;
  padding: 0.875rem 1.25rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
  white-space: nowrap;
}

.status-table tbody tr:last-child th,
.status-table tbody tr:last-child td {
  border-bottom: 0;
}

.status-table tbody th {
  color: var(--text);
  font-weight: 500;
}

.status-table tbody tr {
  transition: background-color var(--dur-fast) ease-out;
}

.status-table tbody tr:hover {
  background: rgba(50, 108, 229, 0.06);
}

@media (max-width: 40rem) {
  .status-panel {
    overflow-x: auto;
  }

  .status-table {
    min-width: 34rem;
  }
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
}

.status__dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  flex: none;
}

.status--ok { color: var(--accent); }
.status--ok .status__dot {
  background: var(--accent);
  box-shadow: 0 0 8px rgba(34, 197, 94, 0.8);
  animation: pulse 2.4s ease-in-out infinite;
}

.status--build { color: var(--amber); }
.status--build .status__dot { background: var(--amber); }

.status--wait { color: var(--text-faint); }
.status--wait .status__dot { background: var(--text-faint); }

/* ---------- Stack chips ---------- */
.stack__label {
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-faint);
  margin-bottom: var(--space-6);
}

.stack {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
}

.stack__chip {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: rgba(15, 23, 41, 0.6);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-muted);
  transition: color var(--dur-fast) ease-out, border-color var(--dur-fast) ease-out;
}

.stack__chip:hover {
  color: var(--text);
  border-color: var(--border-strong);
}

/* ---------- CTA ---------- */
.cta {
  position: relative;
  overflow: hidden;
  text-align: center;
  padding: clamp(2.5rem, 7vw, 4.5rem) clamp(1.5rem, 5vw, 3rem);
  border: 1px solid var(--border-strong);
  border-radius: calc(var(--radius-lg) * 1.25);
  background: linear-gradient(180deg, var(--surface), var(--bg-raised));
  box-shadow: var(--shadow-card);
}

.cta__glow {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(30rem 16rem at 50% -30%, rgba(50, 108, 229, 0.22), transparent 70%),
    radial-gradient(24rem 14rem at 50% 130%, rgba(34, 197, 94, 0.12), transparent 70%);
  pointer-events: none;
}

.cta > :not(.cta__glow) {
  position: relative;
  z-index: 1;
}

.cta__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 750;
  letter-spacing: -0.02em;
}

.cta__text {
  margin: var(--space-4) auto 0;
  max-width: 30rem;
  color: var(--text-muted);
  font-size: 1.0625rem;
}

.cta__actions {
  margin-top: var(--space-8);
  display: flex;
  justify-content: center;
}

.cta__note {
  margin-top: var(--space-4);
  font-size: 0.875rem;
  color: var(--text-faint);
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding-block: var(--space-12);
  background: var(--bg-raised);
}

.site-footer__inner {
  display: grid;
  gap: var(--space-6);
}

.site-footer__brand {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  max-width: 34rem;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.site-footer__brand strong {
  color: var(--text);
}

.site-footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
}

.site-footer__nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9375rem;
  padding-block: var(--space-2);
  transition: color var(--dur-fast) ease-out;
}

.site-footer__nav a:hover {
  color: var(--text);
}

.site-footer__legal {
  font-size: 0.8125rem;
  color: var(--text-faint);
}

/* ---------- Scroll reveal (progressive enhancement) ---------- */
.js-motion .reveal {
  opacity: 0;
  transform: translateY(14px);
}

.js-motion .reveal.is-visible {
  opacity: 1;
  transform: none;
  transition: opacity 0.55s ease-out, transform 0.55s var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}