/* S21 Phone Webzine — shared article system (+ mobile-first hardening) */
:root {
  --ink: #f4efe6;
  --ink-dim: #b5a999;
  --ink-mute: #7a7064;
  --paper: #0a0908;
  --paper-2: #12100e;
  --paper-3: #1a1714;
  --rule: rgba(244,239,230,0.1);
  --rule-strong: rgba(244,239,230,0.18);
  --gold: #d4a84b;
  --gold-bright: #f0c75e;
  --crimson: #e85d4c;
  --teal: #3db8a8;
  --indigo: #8b7cf0;
  --serif: 'Cormorant Garamond', 'Times New Roman', serif;
  --sans: 'DM Sans', 'Noto Sans KR', system-ui, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
  --max: 820px;
  --max-wide: 1100px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --tap: 44px;
}
[data-theme="light"] {
  --ink: #1a1510; --ink-dim: #5c5348; --ink-mute: #8a8074;
  --paper: #f7f1e6; --paper-2: #efe8db; --paper-3: #fffdf8;
  --rule: rgba(26,21,16,0.1); --rule-strong: rgba(26,21,16,0.18);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  overflow-x: hidden;
}
a { color: var(--gold-bright); text-decoration: none; transition: color .2s; }
a:hover { color: var(--teal); }
::selection { background: var(--gold); color: #1a1508; }
img, svg, video { max-width: 100%; height: auto; }

/* spine */
.spine { position: fixed; left: 0; top: 0; bottom: 0; width: 3px; z-index: 200; background: var(--rule); pointer-events: none; }
.spine-fill {
  width: 100%; height: 0;
  background: linear-gradient(180deg, var(--gold), var(--crimson), var(--teal));
}

/* masthead */
.wz-mast {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px max(14px, env(safe-area-inset-right)) 10px max(14px, env(safe-area-inset-left));
  padding-top: max(10px, env(safe-area-inset-top));
  background: color-mix(in srgb, var(--paper) 90%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--rule);
  min-height: 56px;
}
.wz-mast .brand {
  font-family: var(--serif); font-weight: 700; letter-spacing: .08em;
  text-transform: uppercase; font-size: 1rem; color: var(--ink);
  white-space: nowrap; flex-shrink: 0;
}
.wz-mast .brand em { font-style: italic; color: var(--gold); font-weight: 400; }
.wz-mast-actions { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.wz-burger {
  display: none; width: var(--tap); height: var(--tap); min-width: var(--tap);
  border: 1px solid var(--rule-strong); border-radius: 8px;
  background: var(--paper-2); color: var(--ink); font-size: 1.2rem;
  align-items: center; justify-content: center; cursor: pointer; flex-shrink: 0;
}
.wz-nav {
  display: flex; flex-wrap: wrap; gap: 2px 6px; align-items: center; justify-content: flex-end;
}
.wz-nav a, .wz-nav button {
  font-size: .75rem; letter-spacing: .06em; text-transform: uppercase;
  color: var(--ink-dim); background: none; border: none; cursor: pointer;
  padding: 10px 12px; font-family: var(--sans); font-weight: 500;
  min-height: var(--tap); display: inline-flex; align-items: center;
}
.wz-nav a:hover, .wz-nav button:hover { color: var(--gold); }
.wz-nav .pill {
  border: 1px solid var(--rule-strong);
}
.wz-nav .pill.gold {
  background: var(--gold); color: #1a1508 !important; border-color: var(--gold);
  font-weight: 600;
}
.wz-nav-backdrop {
  display: none; position: fixed; inset: 0; z-index: 90;
  background: rgba(0,0,0,.5); border: none; opacity: 0; transition: opacity .25s;
}
.wz-nav-backdrop.show { display: block; opacity: 1; }

/* layout */
.wz-shell {
  max-width: var(--max); margin: 0 auto;
  padding: 28px max(16px, env(safe-area-inset-right)) 96px max(16px, env(safe-area-inset-left));
}
.wz-shell.wide { max-width: var(--max-wide); }
.wz-shell-code { max-width: none; }
.wz-crumb {
  font-size: .75rem; letter-spacing: .1em; text-transform: uppercase;
  color: var(--ink-mute); margin-bottom: 18px; display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
  line-height: 1.4;
}
.wz-crumb a { color: var(--ink-dim); min-height: 32px; display: inline-flex; align-items: center; }
.wz-crumb .sep { opacity: .5; }

.wz-hero {
  border-bottom: 1px solid var(--rule); padding-bottom: 24px; margin-bottom: 28px;
}
.wz-kicker {
  font-size: .72rem; letter-spacing: .16em; text-transform: uppercase;
  color: var(--gold); font-weight: 600; margin-bottom: 12px;
}
.wz-hero h1 {
  font-family: var(--serif); font-size: clamp(1.75rem, 6vw, 3rem);
  font-weight: 600; line-height: 1.18; letter-spacing: -.02em; margin-bottom: 12px;
  word-break: keep-all; overflow-wrap: anywhere;
}
.wz-hero .deck { color: var(--ink-dim); font-weight: 300; font-size: 1.02rem; max-width: 36em; }
.wz-meta {
  display: flex; flex-wrap: wrap; gap: 8px 10px; margin-top: 16px;
  font-size: .75rem; color: var(--ink-mute); letter-spacing: .03em;
}
.wz-meta span {
  border: 1px solid var(--rule); padding: 6px 10px; line-height: 1.35;
  max-width: 100%; word-break: break-word;
}

/* article prose */
.wz-prose { font-size: 1.02rem; color: var(--ink-dim); font-weight: 300; overflow-wrap: anywhere; }
.wz-prose > *:first-child { margin-top: 0; }
.wz-prose h1, .wz-prose h2, .wz-prose h3, .wz-prose h4 {
  font-family: var(--serif); color: var(--ink); font-weight: 600;
  letter-spacing: -.01em; line-height: 1.25; margin: 1.7em 0 .7em;
  overflow-wrap: anywhere;
}
.wz-prose h1 { font-size: 1.7rem; }
.wz-prose h2 {
  font-size: 1.4rem; padding-bottom: .4rem;
  border-bottom: 1px solid var(--rule);
}
.wz-prose h3 { font-size: 1.2rem; color: var(--gold-bright); }
.wz-prose h4 { font-size: 1.05rem; }
.wz-prose p { margin: 0 0 1.1em; }
.wz-prose ul, .wz-prose ol { margin: 0 0 1.1em; padding-left: 1.25em; }
.wz-prose li { margin: .35em 0; }
.wz-prose li a {
  display: inline-block; padding: 6px 0; min-height: 40px; line-height: 1.4;
}
.wz-prose li::marker { color: var(--gold); }
.wz-prose strong { color: var(--ink); font-weight: 600; }
.wz-prose em { color: var(--ink); }
.wz-prose hr {
  border: none; border-top: 1px solid var(--rule); margin: 2em 0;
}
.wz-prose blockquote {
  margin: 1.3em 0; padding: .9em 1em;
  border-left: 3px solid var(--gold);
  background: var(--paper-2); color: var(--ink-dim);
  font-family: var(--serif); font-size: 1.1rem; font-style: italic;
}
.wz-prose code {
  font-family: var(--mono); font-size: .86em;
  background: var(--paper-2); border: 1px solid var(--rule);
  padding: .12em .4em; color: var(--gold-bright);
  word-break: break-word;
}
.wz-prose pre {
  background: #0d0c0b; border: 1px solid var(--rule);
  padding: 1rem; overflow-x: auto; margin: 1.2em 0;
  font-size: .82rem; line-height: 1.55;
  -webkit-overflow-scrolling: touch; max-width: 100%;
}
[data-theme="light"] .wz-prose pre { background: #1a1814; color: #f4efe6; }
.wz-prose pre code {
  background: none; border: none; padding: 0; color: #e8dfd0; font-size: inherit;
  word-break: normal; white-space: pre;
}
.wz-prose table {
  width: 100%; border-collapse: collapse; margin: 1.3em 0;
  font-size: .88rem; display: block; overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.wz-prose th {
  text-align: left; padding: .7rem .8rem; color: var(--ink-mute);
  font-size: .72rem; letter-spacing: .06em; text-transform: uppercase;
  border-bottom: 1px solid var(--rule-strong); background: var(--paper-2);
  white-space: nowrap;
}
.wz-prose td {
  padding: .7rem .8rem; border-bottom: 1px solid var(--rule);
  color: var(--ink-dim); vertical-align: top;
}
.wz-prose tr:hover td { background: var(--paper-2); }
.wz-prose img { max-width: 100%; height: auto; border: 1px solid var(--rule); }

/* TOC */
.wz-toc {
  background: var(--paper-2); border: 1px solid var(--rule);
  padding: 16px 16px; margin: 0 0 1.6em;
}
.wz-toc .label {
  font-size: .72rem; letter-spacing: .14em; text-transform: uppercase;
  color: var(--gold); font-weight: 600; margin-bottom: 10px;
}
.wz-toc ol { margin: 0; padding-left: 1.15em; }
.wz-toc li { margin: .4em 0; font-size: .92rem; }
.wz-toc a {
  color: var(--ink-dim); display: inline-block; padding: 4px 0; min-height: 36px;
}

/* pager */
.wz-pager {
  display: grid; grid-template-columns: 1fr 1fr; gap: 10px;
  margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--rule);
}
.wz-pager a {
  display: block; padding: 16px; border: 1px solid var(--rule);
  background: var(--paper-2); color: var(--ink-dim); transition: .25s var(--ease);
  min-height: 72px;
}
.wz-pager a:hover { border-color: var(--gold); color: var(--ink); transform: translateY(-2px); }
.wz-pager .dir {
  font-size: .7rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--gold); margin-bottom: 6px; display: block;
}
.wz-pager .title { font-family: var(--serif); font-size: 1.1rem; color: var(--ink); line-height: 1.3; }
.wz-pager .next { text-align: right; }

/* related */
.wz-related { margin-top: 36px; }
.wz-related h2 {
  font-family: var(--serif); font-size: 1.25rem; margin-bottom: 12px;
  color: var(--ink);
}
.wz-related .grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 10px;
}
.wz-related a {
  display: block; padding: 14px; border: 1px solid var(--rule);
  background: var(--paper-2); color: var(--ink-dim); font-size: .88rem;
  transition: .25s; min-height: 72px;
}
.wz-related a:hover { border-color: var(--gold); color: var(--ink); }
.wz-related a strong { display: block; color: var(--ink); margin-bottom: 4px; font-size: .92rem; }

/* footer */
.wz-foot {
  margin-top: 48px; padding: 24px 0 10px; border-top: 1px solid var(--rule);
  text-align: center; color: var(--ink-mute); font-size: .82rem;
}
.wz-foot .gold { color: var(--gold); margin-top: 8px; font-weight: 500; }
.wz-foot a {
  display: inline-flex; align-items: center; min-height: 44px; padding: 8px 12px;
}

/* float */
.wz-float {
  position: fixed;
  bottom: max(16px, env(safe-area-inset-bottom));
  right: max(12px, env(safe-area-inset-right));
  z-index: 120;
  display: flex; flex-direction: column; gap: 8px;
}
.wz-float button {
  width: 48px; height: 48px; border: 1px solid var(--rule-strong);
  background: color-mix(in srgb, var(--paper-2) 92%, transparent);
  backdrop-filter: blur(10px); color: var(--ink-dim); cursor: pointer;
  font-size: 1rem; border-radius: 10px;
}
.wz-float button:hover { border-color: var(--gold); color: var(--gold); }
#wzTop { opacity: 0; pointer-events: none; transition: opacity .3s; }
#wzTop.show { opacity: 1; pointer-events: all; }

/* code viewer */
.wz-code-head {
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  margin-bottom: 12px; flex-wrap: wrap;
}
.wz-code-head .path {
  font-family: var(--mono); font-size: .78rem; color: var(--teal);
  word-break: break-all;
}
.wz-code-head button {
  font-size: .75rem; letter-spacing: .08em; text-transform: uppercase;
  padding: 10px 14px; border: 1px solid var(--rule); background: var(--paper-2);
  color: var(--ink-dim); cursor: pointer; font-family: var(--sans);
  min-height: var(--tap);
}
.wz-code-head button:hover { border-color: var(--gold); color: var(--gold); }

/* ── Mobile ── */
@media (max-width: 720px) {
  .spine { width: 2px; }
  .wz-burger { display: inline-flex; }
  .wz-nav {
    position: fixed; top: 0; right: 0; bottom: 0; width: min(86vw, 320px);
    background: var(--paper-2); border-left: 1px solid var(--rule);
    flex-direction: column; align-items: stretch; justify-content: flex-start;
    padding: calc(72px + env(safe-area-inset-top)) 12px max(20px, env(safe-area-inset-bottom));
    gap: 2px; z-index: 95;
    transform: translateX(105%); transition: transform .3s var(--ease);
    overflow-y: auto; flex-wrap: nowrap;
  }
  .wz-nav.open {
    transform: translateX(0);
    box-shadow: -16px 0 48px rgba(0,0,0,.4);
  }
  .wz-nav a, .wz-nav button {
    width: 100%; min-height: 48px; padding: 14px 16px; font-size: .9rem;
    border-bottom: 1px solid var(--rule); justify-content: flex-start;
  }
  .wz-nav .pill.gold { justify-content: center; margin-top: 10px; border: none; }

  .wz-shell { padding-top: 20px; padding-bottom: 110px; }
  .wz-hero h1 { font-size: clamp(1.6rem, 7.5vw, 2.2rem); }
  .wz-hero .deck { font-size: .98rem; }
  .wz-prose { font-size: 1rem; }
  .wz-prose h1 { font-size: 1.45rem; }
  .wz-prose h2 { font-size: 1.25rem; }
  .wz-prose h3 { font-size: 1.1rem; }
  .wz-prose pre { font-size: .78rem; padding: .85rem; }
  .wz-prose table { font-size: .84rem; }
  .wz-pager { grid-template-columns: 1fr; }
  .wz-pager .next { text-align: left; }
  .wz-related .grid { grid-template-columns: 1fr; }
  .wz-meta span { font-size: .72rem; }
  /* iOS input zoom prevention */
  input, select, textarea { font-size: 16px !important; }
}

@media (max-width: 420px) {
  .wz-crumb { font-size: .7rem; gap: 6px; }
  .wz-kicker { letter-spacing: .1em; }
}

/* —— Interactive doc app bar —— */
.wz-appbar {
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
  margin: 0 0 22px; padding: 12px; background: var(--paper-2);
  border: 1px solid var(--rule); position: sticky; top: 56px; z-index: 40;
}
.wz-search {
  flex: 1 1 160px; min-height: 40px; padding: 8px 12px;
  border: 1px solid var(--rule-strong); background: var(--paper);
  color: var(--ink); font: inherit; border-radius: 2px;
}
.wz-appbar button {
  min-height: 40px; padding: 8px 12px; border: 1px solid var(--rule-strong);
  background: var(--paper-3); color: var(--ink-dim); font-size: .72rem;
  letter-spacing: .06em; text-transform: uppercase; cursor: pointer; font-family: inherit;
}
.wz-appbar button:hover { border-color: var(--gold); color: var(--ink); }
.wz-prose .wz-sec {
  border: 1px solid var(--rule); background: var(--paper-2); margin: 1.1em 0;
  border-radius: 2px; overflow: hidden;
}
.wz-prose .wz-sec > .wz-sec-h {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 12px;
  text-align: left; padding: 14px 16px; background: none; border: none; color: inherit;
  font: inherit; cursor: pointer; min-height: 48px;
}
.wz-prose .wz-sec > .wz-sec-h h2,
.wz-prose .wz-sec > .wz-sec-h h3 { margin: 0; font-size: 1.15rem; pointer-events: none; }
.wz-prose .wz-sec .wz-sec-ico {
  width: 28px; height: 28px; border: 1px solid var(--rule-strong);
  display: grid; place-items: center; color: var(--gold); flex-shrink: 0;
  transition: transform .25s var(--ease);
}
.wz-prose .wz-sec.open .wz-sec-ico { transform: rotate(45deg); }
.wz-prose .wz-sec .wz-sec-b {
  display: grid; grid-template-rows: 0fr; transition: grid-template-rows .35s var(--ease);
}
.wz-prose .wz-sec.open .wz-sec-b { grid-template-rows: 1fr; }
.wz-prose .wz-sec .wz-sec-i { overflow: hidden; min-height: 0; opacity: 0; transition: opacity .25s; padding: 0 16px; }
.wz-prose .wz-sec.open .wz-sec-i { opacity: 1; padding: 0 16px 16px; }
.wz-prose mark.wz-hit { background: color-mix(in srgb, var(--gold) 45%, transparent); color: inherit; padding: 0 2px; }
.wz-prose tr.wz-hide, .wz-prose .wz-hide { display: none !important; }
.wz-status-pill {
  display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px;
  border: 1px solid var(--rule); font-size: .7rem; letter-spacing: .08em; text-transform: uppercase;
}
.wz-status-pill.ok { border-color: rgba(61,184,168,.45); color: var(--teal); }
.wz-status-pill.bad { border-color: rgba(232,93,76,.45); color: var(--crimson); }