/* Kingdom Communism manifesto — modern minimal */

:root {
  --ink: #0a0a0a;
  --ink-2: #27272a;
  --muted: #71717a;
  --muted-2: #a1a1aa;
  --line: #e4e4e7;
  --line-2: #f4f4f5;
  --bg: #ffffff;
  --bg-2: #fafafa;
  --accent: #0a0a0a;
  --max: 38rem;
  --gutter: clamp(1.25rem, 4vw, 2rem);
  --font-ko: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", system-ui, sans-serif;
  --font-en: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", system-ui, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #f5f5f5;
    --ink-2: #d4d4d8;
    --muted: #a1a1aa;
    --muted-2: #71717a;
    --line: #262626;
    --line-2: #18181b;
    --bg: #0a0a0a;
    --bg-2: #111111;
    --accent: #f5f5f5;
  }
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 4rem;
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-ko);
  font-size: 17px;
  line-height: 1.75;
  font-feature-settings: "ss01", "ss02", "cv01";
  word-break: keep-all;
  overflow-wrap: break-word;
}

body.en { font-family: var(--font-en); }

@media (min-width: 720px) {
  body { font-size: 18px; }
}

::selection { background: var(--ink); color: var(--bg); }

a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: border-color .15s ease, color .15s ease;
}
a:hover { border-bottom-color: var(--ink); }

/* ── Nav ─────────────────────────────────────────── */

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  max-width: 64rem;
  margin: 0 auto;
  padding: .9rem var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: .8125rem;
  letter-spacing: .04em;
}

.nav-brand {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
  border: none;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.lang-switch a, .lang-switch span {
  border: none;
  padding: .25rem .5rem;
  border-radius: 999px;
  color: var(--muted);
}
.lang-switch .active {
  color: var(--ink);
  background: var(--line-2);
}
.lang-switch .sep { color: var(--muted-2); padding: 0; }

.nav-share {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink);
  border: 1px solid var(--ink);
  background: transparent;
  padding: .4rem .75rem;
  border-radius: 999px;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background .15s ease, color .15s ease;
}
.nav-share:hover { background: var(--ink); color: var(--bg); }

/* ── Layout ──────────────────────────────────────── */

main { padding: 0 var(--gutter); }

.container {
  max-width: var(--max);
  margin: 0 auto;
}
.container-wide {
  max-width: 56rem;
  margin: 0 auto;
}

/* ── Hero ────────────────────────────────────────── */

.hero {
  padding: clamp(4rem, 12vh, 9rem) 0 clamp(3rem, 8vh, 5rem);
  border-bottom: 1px solid var(--line);
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 1.75rem;
}

.hero h1 {
  font-size: clamp(2.75rem, 8vw, 5.5rem);
  line-height: 1.02;
  letter-spacing: -0.035em;
  font-weight: 700;
  margin: 0 0 1.5rem;
}

body.en .hero h1 { letter-spacing: -0.04em; }

.hero-sub {
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  line-height: 1.5;
  color: var(--ink-2);
  max-width: 32rem;
  margin: 0 0 2.5rem;
  font-weight: 400;
}

.hero-meta {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

/* ── Table of contents ──────────────────────────── */

.toc {
  padding: 3rem 0;
  border-bottom: 1px solid var(--line);
}
.toc-label {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 1.25rem;
}
.toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}
@media (min-width: 720px) {
  .toc-list { grid-template-columns: 1fr 1fr; column-gap: 2.5rem; }
}
.toc-list li { border-top: 1px solid var(--line); }
.toc-list li:last-child { border-bottom: 1px solid var(--line); }
@media (min-width: 720px) {
  .toc-list li:nth-last-child(2) { border-bottom: 1px solid var(--line); }
}
.toc-list a {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: .75rem;
  padding: 1rem 0;
  border: none;
  align-items: baseline;
}
.toc-list a:hover { color: var(--muted); }
.toc-num {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--muted);
  letter-spacing: .04em;
}
.toc-title { font-size: 1rem; }

/* ── Sections ────────────────────────────────────── */

.section {
  padding: clamp(3.5rem, 9vh, 6rem) 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 5rem;
}

.section-header {
  margin: 0 0 2.5rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.section-number {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -0.025em;
  font-weight: 700;
  margin: 0;
}

.section-body p {
  margin: 0 0 1.5rem;
  color: var(--ink-2);
}

.section-body p:last-child { margin-bottom: 0; }

/* declaration section gets larger paragraph spacing for impact */
.section.declaration .section-body p {
  font-size: clamp(1.0625rem, 1.6vw, 1.1875rem);
  line-height: 1.55;
  color: var(--ink);
  margin: 0 0 1.25rem;
}

.principles {
  margin: 2.5rem 0 0;
  padding: 2rem 0 0;
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: .5rem;
}
.principles p {
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 0;
  line-height: 1.3;
}

/* ── Share section ───────────────────────────────── */

.share {
  padding: clamp(4rem, 10vh, 6rem) 0;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

.share h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -0.025em;
  font-weight: 700;
  margin: 0 0 1rem;
}
.share p {
  color: var(--muted);
  margin: 0 0 2rem;
  font-size: 1rem;
}

.share-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .625rem;
}

.share-btn {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--ink);
  padding: .75rem 1.125rem;
  border-radius: 999px;
  cursor: pointer;
  text-decoration: none;
  transition: background .15s ease, color .15s ease, transform .1s ease;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
}
.share-btn:hover {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}
.share-btn:active { transform: translateY(1px); }
.share-btn.primary {
  background: var(--ink);
  color: var(--bg);
}
.share-btn.primary:hover {
  background: transparent;
  color: var(--ink);
}
.share-btn[hidden] { display: none; }

/* ── Toast ──────────────────────────────────────── */

.toast {
  position: fixed;
  left: 50%;
  bottom: 2rem;
  transform: translateX(-50%) translateY(1rem);
  background: var(--ink);
  color: var(--bg);
  padding: .75rem 1.25rem;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s ease, transform .2s ease;
  z-index: 20;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ── Footer ─────────────────────────────────────── */

footer {
  padding: 3rem var(--gutter) 4rem;
  text-align: center;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
}
footer a { border: none; }
footer a:hover { color: var(--ink); }

/* ── Print ──────────────────────────────────────── */

@media print {
  .nav, .share, .toast, footer { display: none; }
  .section { page-break-inside: avoid; border: none; padding: 1.5rem 0; }
  body { font-size: 11pt; color: #000; background: #fff; }
}

/* ── Reduced motion ─────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}