@font-face {
  font-family: 'Chakra Petch';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('/fonts/ChakraPetch-600.woff2') format('woff2');
}
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 300;
  font-display: swap;
  src: url('/fonts/JetBrainsMono-300.woff2') format('woff2');
}
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('/fonts/JetBrainsMono-400.woff2') format('woff2');
}
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('/fonts/JetBrainsMono-700.woff2') format('woff2');
}

/* wip-scm.org — ice phosphor, mono structure + system-ui prose
   typescale: 0.875 / 1 / 1.125 / 1.25 / 1.5 / hero clamp
   vertical rhythm: 1.5rem base unit, spacing in 0.75rem steps */

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

:root {
  /* catppuccin mocha; accent derived from --phos via color-mix.
     peach runs hotter than stock #fab387 for contrast punch */
  --phos: #ffa155;
  --phos-bright: color-mix(in oklab, var(--phos) 65%, white);
  --phos-dim: color-mix(in oklab, var(--phos) 65%, var(--bg));
  --phos-dark: #45475a;
  --phos-glow: color-mix(in srgb, var(--phos) 25%, transparent);
  --bg: #1e1e2e;
  --bg-screen: #11111b;
  --code-bg: rgba(49, 50, 68, 0.4);
  --code-mid: #a6adc8;
  --code-comment: #6c7086;
  --mark-bg: color-mix(in srgb, var(--phos) 12%, transparent);
  --ink: #cdd6f4;
  --ink-dim: #a6adc8;

  /* typescale */
  --fs-xs: 0.75rem;       /* 12px — chips, micro labels (minimum) */
  --fs-sm: 0.875rem;      /* 14px — nav, labels, chrome */
  --fs-base: 1rem;        /* 16px — prose minimum */
  --fs-md: 1.125rem;      /* 18px — lede */
  --fs-lg: 1.25rem;       /* 20px — big claims */
  --fs-xl: 1.5rem;        /* 24px — h2 */
  --fs-h1: clamp(2.125rem, 6vw, 3.375rem); /* 34-54px */

  /* rhythm */
  --rhy: 1.5rem;          /* 24px base line */
  --rhy-half: 0.75rem;

  --font-display: 'JetBrains Mono', monospace;
  --font-main: 'JetBrains Mono', monospace;
  --font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  color-scheme: dark;
}

html { scroll-behavior: smooth; }
html, body { min-height: 100%; background: #000; overflow-x: hidden; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* faint ambient phosphor glow */
body::after {
  content: '';
  position: fixed; inset: 0; z-index: -1;
  background: radial-gradient(ellipse 80% 55% at 50% -10%, var(--phos-dark) 0%, var(--bg) 65%);
  opacity: 0.35;
}

a {
  color: var(--phos);
  text-decoration: underline;
  text-decoration-color: var(--phos-dark);
  text-underline-offset: 3px;
  transition: color 0.2s, text-decoration-color 0.2s;
}
a:hover { color: var(--phos-bright); text-decoration-color: var(--phos); }

code {
  background: var(--code-bg);
  border: 1px solid var(--phos-dark);
  padding: 0.1em 0.4em;
  border-radius: 3px;
  font-family: var(--font-main);
  font-size: 0.875em;
  color: var(--phos-bright);
  white-space: nowrap;
}

strong { color: var(--phos-bright); font-weight: 600; }
em { font-style: italic; }

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

.site-header {
  max-width: 52rem; margin: 0 auto; padding: var(--rhy) 1.5rem var(--rhy-half);
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
  flex-wrap: wrap;
}

.logo { display: flex; align-items: center; gap: 0.6rem; color: var(--phos); }
.logo svg {
  width: 26px; height: 26px;
  display: block;
  filter: drop-shadow(0 0 8px var(--phos-glow));
}
.logo-text {
  font-family: 'Chakra Petch', sans-serif;
  font-size: var(--fs-md); font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--phos);
}
.logo-text .dim { color: var(--ink-dim); }

.site-nav { display: flex; gap: 1.5rem; }
.site-nav a {
  font-family: var(--font-main);
  font-size: var(--fs-sm);
  color: var(--ink-dim);
  text-decoration: none;
  letter-spacing: 0.04em;
  transition: color 0.2s;
}
.site-nav a:hover { color: var(--phos); }

.rfc-badge {
  font-family: var(--font-main);
  font-size: var(--fs-xs); letter-spacing: 0.12em; font-weight: 700;
  color: var(--bg); background: var(--phos);
  padding: 0.25em 0.8em; border-radius: 2px;
  text-decoration: none;
  transition: background 0.15s, box-shadow 0.2s;
}
a.rfc-badge:hover { background: var(--phos-bright); color: var(--bg); box-shadow: 0 0 12px var(--phos-glow); }

.rule-glow {
  max-width: 52rem; margin: 0 auto;
  height: 1px; border: none;
  background: var(--phos-dim);
  box-shadow: 0 0 8px var(--phos-glow);
  opacity: 0.8;
}

/* ---------- layout ---------- */

main { max-width: 52rem; margin: 0 auto; padding: 0 1.5rem 6rem; position: relative; z-index: 1; }

section { margin-top: 6rem; }

h1 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: var(--fs-h1);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: var(--rhy);
}
h1 em { font-style: normal; color: var(--phos); text-shadow: 0 0 18px var(--phos-glow); }

h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-xl);
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: var(--rhy);
  padding-bottom: var(--rhy-half);
  border-bottom: 1px solid var(--phos-dark);
}

.sec-num { color: var(--phos-dim); font-weight: 400; margin-right: 0.6rem; }

h3 {
  font-family: var(--font-main);
  font-size: var(--fs-base); font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--phos);
  margin-bottom: var(--rhy-half);
}

p { margin-bottom: var(--rhy); }
p:last-child { margin-bottom: 0; }

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

.hero { margin-top: 4.5rem; }

.hero-top {
  display: flex; align-items: center; gap: 2.5rem;
  margin-bottom: 3rem;
}
.hero-top h1 { flex: 1 1 auto; min-width: min(38rem, 100%); margin-bottom: 0; }

.hero-mark {
  flex-shrink: 0;
  width: 180px; height: 180px;
  color: var(--phos);
  opacity: 0.55;
  filter: drop-shadow(0 0 24px var(--phos-glow));
  pointer-events: none;
}
/* mobile: mark becomes a faint background behind the headline */
@media (max-width: 760px) {
  .hero-top { position: relative; }
  .hero-mark {
    position: absolute;
    top: -0.5rem; right: -2rem;
    width: 230px; height: 230px;
    opacity: 0.15;
    filter: none;
    z-index: -1;
  }
}

.lede { font-size: var(--fs-md); line-height: 1.5; margin-bottom: 2.25rem; max-width: 62ch; }
.lede strong { color: var(--phos); }

.hero-cta { display: flex; gap: var(--rhy-half); flex-wrap: wrap; margin-bottom: var(--rhy-half); }
.hero-microcopy {
  font-size: var(--fs-sm); color: var(--ink-dim); margin-bottom: 4.5rem;
  opacity: 0.7;
  transition: opacity 0.2s;
}
.hero-microcopy:hover { opacity: 1; }

.terminal {
  background: var(--bg-screen);
  border: 1px solid var(--phos-dark);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 0 50px var(--phos-glow), 0 20px 40px rgba(0, 0, 0, 0.5);
  animation: rise 0.7s ease both 0.15s;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}

.terminal-bar {
  display: flex; align-items: center; gap: 7px;
  padding: var(--rhy-half) 1rem;
  border-bottom: 1px solid var(--phos-dark);
  background: rgba(0, 0, 0, 0.3);
}
.terminal-bar i { width: 10px; height: 10px; border-radius: 50%; border: 1px solid var(--phos-dark); }
.terminal-bar span {
  font-family: var(--font-main);
  margin-left: 0.5rem; font-size: var(--fs-xs);
  color: var(--ink-dim); letter-spacing: 0.1em; text-transform: uppercase;
}

.terminal pre {
  padding: var(--rhy);
  font-family: var(--font-main);
  font-size: var(--fs-sm);
  line-height: 1.715; /* 24px on 14px — rhythm line */
  min-height: 15.5em;
  white-space: pre-wrap;
  word-break: break-word;
}

.terminal .t-cmd { color: var(--ink); }
.terminal .t-prompt { color: var(--phos); }
.terminal .t-out { color: var(--code-mid); }
.terminal .t-seal { color: var(--phos); background: var(--mark-bg); }
.terminal .t-ok { color: var(--phos-bright); }
.terminal .t-comment { color: var(--code-comment); }

.cursor { color: var(--phos); animation: cursor-blink 0.7s step-end infinite; }

.terminal-note { margin-top: var(--rhy-half); font-size: var(--fs-sm); color: var(--ink-dim); }

.stats-strip {
  display: flex; gap: 2rem; flex-wrap: wrap;
  margin-top: var(--rhy);
  padding: var(--rhy-half) 0;
  border-top: 1px solid var(--phos-dark);
  border-bottom: 1px solid var(--phos-dark);
  font-family: var(--font-main);
  font-size: var(--fs-sm);
  color: var(--ink-dim);
}
.stats-strip strong {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-md);
  color: var(--phos);
  margin-right: 0.35rem;
}

/* ---------- problem ---------- */

.big-claim {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-lg);
  line-height: 1.5;
  color: var(--ink);
  border-left: 3px solid var(--phos);
  padding-left: 1.125rem;
  margin: var(--rhy) 0;
}

.problem-list { list-style: none; margin-bottom: var(--rhy); }
.problem-list li {
  padding: var(--rhy-half) 0 var(--rhy-half) 1.6rem;
  position: relative;
  border-bottom: 1px dashed var(--phos-dark);
  color: var(--ink-dim);
}
.problem-list li strong { color: var(--ink); }
.problem-list li::before { content: '>'; position: absolute; left: 0.2rem; color: var(--phos); font-family: var(--font-main); }

/* ---------- pillars ---------- */

.pillars { list-style: none; counter-reset: pillar; }
.pillars > li {
  counter-increment: pillar;
  padding: var(--rhy) 0 var(--rhy) 3.5rem;
  position: relative;
  border-bottom: 1px solid var(--phos-dark);
}
.pillars > li::before {
  content: counter(pillar, decimal-leading-zero);
  position: absolute; left: 0; top: 1.6rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-md);
  color: var(--phos-dim);
}
.pillars p { color: var(--ink-dim); margin-bottom: var(--rhy-half); }
.pillars p:last-child { margin-bottom: 0; }
.pillars p strong { color: var(--ink); }

/* ---------- kill list ---------- */

.kill-list { list-style: none; counter-reset: kill; margin-top: var(--rhy); }
.kill-list li {
  counter-increment: kill;
  padding: var(--rhy-half) 0 var(--rhy-half) 2.6rem;
  position: relative;
  border-bottom: 1px dashed var(--phos-dark);
  color: var(--ink-dim);
}
.kill-list li strong {
  font-family: var(--font-main);
  font-size: 0.875em;
  color: var(--phos);
  font-weight: 700;
}
.kill-list li::before {
  content: counter(kill);
  position: absolute; left: 0.3rem; top: var(--rhy-half);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-base);
  color: var(--phos);
}

/* ---------- antagonist Q&A ---------- */

.qa {
  border: 1px solid var(--phos-dark);
  border-radius: 6px;
  margin-bottom: var(--rhy-half);
  background: var(--code-bg);
  transition: border-color 0.2s;
}
.qa.is-open { border-color: var(--phos-dim); }

.qa button {
  all: unset;
  cursor: pointer;
  display: flex; align-items: center; gap: 0.75rem;
  width: 100%; box-sizing: border-box;
  padding: var(--rhy-half) 1rem;
  font-family: var(--font-main); font-size: var(--fs-base); font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
}
.qa button:hover { color: var(--phos-bright); }

.qa-status {
  flex-shrink: 0;
  font-family: var(--font-main);
  font-size: 0.75rem; letter-spacing: 0.12em; font-weight: 700;
  padding: 0.15em 0.65em; border-radius: 2px;
}
.qa-status.open-q { background: var(--phos); color: var(--bg); }
.qa-status.answered { background: none; color: var(--ink-dim); border: 1px solid var(--phos-dark); }

.qa div[x-show] { padding: 0 1rem var(--rhy-half); font-size: var(--fs-base); color: var(--ink-dim); }

/* ---------- status ---------- */

.status-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--rhy-half);
  margin-bottom: var(--rhy);
}
@media (max-width: 560px) { .status-grid { grid-template-columns: 1fr; } }

.status-col {
  border: 1px solid var(--phos-dark); border-radius: 6px; padding: var(--rhy);
  background: var(--code-bg);
}
.status-col h3 { margin-bottom: var(--rhy-half); font-size: var(--fs-sm); letter-spacing: 0.12em; }
.status-col.exists h3 { color: var(--phos); }
.status-col.missing h3 { color: var(--ink-dim); }
.status-col ul { list-style: none; }
.status-col li { padding: 0.25rem 0 0.25rem 1.3rem; position: relative; color: var(--ink-dim); font-size: var(--fs-base); }
.status-col.exists li::before { content: '+'; position: absolute; left: 0; color: var(--phos); font-family: var(--font-main); }
.status-col.missing li::before { content: '-'; position: absolute; left: 0; color: var(--phos-dark); font-family: var(--font-main); }

/* ---------- CTA ---------- */

.cta-row { margin: var(--rhy) 0 3rem; }

.btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: var(--fs-base); font-weight: 500;
  letter-spacing: 0.01em;
  line-height: 1.5;
  color: var(--bg);
  background: var(--phos);
  background-image: repeating-linear-gradient(to bottom,
    transparent 0 2px, rgba(0, 0, 0, 0.14) 2px 4px);
  padding: var(--rhy-half) 1.5rem;
  border-radius: 4px;
  border: none;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s, box-shadow 0.2s, transform 0.15s;
}
.btn:hover {
  background-color: var(--phos-bright); color: var(--bg);
  box-shadow: 0 0 20px var(--phos-glow);
  transform: translateY(-1px);
  animation: btn-scan 0.5s linear infinite;
}
.btn:disabled { opacity: 0.6; cursor: default; transform: none; box-shadow: none; }

.btn.btn-ghost {
  background: none;
  border: 1px solid var(--phos-dark);
  color: var(--phos);
}
.btn.btn-ghost:hover {
  background-color: var(--code-bg);
  border-color: var(--phos-dim);
  color: var(--phos-bright);
  box-shadow: none;
}

.notify label { display: block; color: var(--ink-dim); font-size: var(--fs-base); margin-bottom: var(--rhy-half); }
.notify-row { display: flex; gap: var(--rhy-half); flex-wrap: wrap; }
.notify input {
  flex: 1; min-width: 220px;
  background: var(--bg-screen);
  border: 1px solid var(--phos-dark);
  border-radius: 4px;
  padding: var(--rhy-half) 1rem;
  font-family: var(--font-main); font-size: var(--fs-base);
  line-height: 1.5;
  color: var(--ink);
  caret-color: var(--phos);
}
.notify input::placeholder { color: var(--code-comment); }
.notify input:focus { outline: none; border-color: var(--phos-dim); box-shadow: 0 0 10px var(--phos-glow); }
.form-msg { margin-top: var(--rhy-half); font-family: var(--font-main); font-size: var(--fs-sm); color: var(--phos); }
.form-msg.is-success { color: #a6e3a1; }
html[data-theme="light"] .form-msg.is-success { color: #40a02b; }

.spinner {
  display: inline-block;
  width: 0.9em; height: 0.9em;
  margin-right: 0.5em;
  vertical-align: -0.1em;
  border: 2px solid var(--bg);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

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

footer {
  max-width: 52rem; margin: 0 auto;
  padding: var(--rhy) 1.5rem 3rem;
  border-top: 1px solid var(--phos-dark);
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  color: var(--ink-dim);
  font-family: var(--font-main); font-size: var(--fs-sm);
  position: relative; z-index: 1;
  opacity: 0.7;
  transition: opacity 0.2s;
}
footer:hover { opacity: 1; }

/* ---------- animations ---------- */

@keyframes cursor-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

@keyframes btn-scan {
  from { background-position: 0 0; }
  to { background-position: 0 4px; }
}

@media (prefers-reduced-motion: reduce) {
  .terminal, .cursor, .btn { animation: none !important; }
  html { scroll-behavior: auto; }
}

@media (max-width: 600px) {
  main { padding: 0 1.2rem 4.5rem; }
  .site-header { padding: 1.2rem 1.2rem var(--rhy-half); }
}

/* ---------- theme toggle ---------- */

.header-actions { display: flex; align-items: center; gap: 0.75rem; }
.header-actions .icon-btn + .theme-toggle,
.header-actions .icon-btn ~ .icon-btn { margin-left: -0.35rem; }

.icon-btn {
  background: none; border: none; cursor: pointer;
  color: var(--ink-dim);
  display: flex; align-items: center;
  padding: 0.25rem;
  transition: color 0.2s;
}
.icon-btn:hover { color: var(--phos); }
html[data-theme="light"] .icon-sun { display: none; }
html:not([data-theme="light"]) .icon-moon { display: none; }

/* ---------- light version (catppuccin latte) ---------- */

html[data-theme="light"] {
  --phos: #d45500;
  --phos-bright: color-mix(in oklab, var(--phos) 75%, black);
  --phos-dim: color-mix(in oklab, var(--phos) 60%, var(--bg));
  --phos-dark: #bcc0cc;
  --phos-glow: color-mix(in srgb, var(--phos) 16%, transparent);
  --bg: #eff1f5;
  --bg-screen: #ffffff;
  --code-bg: rgba(204, 208, 218, 0.35);
  --code-mid: #6c6f85;
  --code-comment: #9ca0b0;
  --mark-bg: color-mix(in srgb, var(--phos) 10%, transparent);
  --ink: #4c4f69;
  --ink-dim: #6c6f85;
  color-scheme: light;
}

html[data-theme="light"], html[data-theme="light"] body { background: var(--bg); }
html[data-theme="light"] body::after { opacity: 0.5; }

/* terminal on latte: light screen, soft shadow */
html[data-theme="light"] .terminal {
  box-shadow: 0 12px 32px rgba(76, 79, 105, 0.14);
}
html[data-theme="light"] .terminal-bar { background: rgba(204, 208, 218, 0.3); }