/* ============================================================
   KJXING.COM — personal homepage
   Editorial paper theme · Fraunces + IBM Plex Mono
   ============================================================ */

/* ---------- Fonts (self-hosted, latin subsets) ---------- */
@font-face {
  font-family: 'Fraunces';
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url('../fonts/fraunces-normal-300-700.woff2') format('woff2');
}
@font-face {
  font-family: 'Fraunces';
  font-style: italic;
  font-weight: 300 700;
  font-display: swap;
  src: url('../fonts/fraunces-italic-300-700.woff2') format('woff2');
}
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/plexmono-normal-400.woff2') format('woff2');
}
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('../fonts/plexmono-normal-500.woff2') format('woff2');
}

/* ---------- Tokens ---------- */
:root {
  --paper:      #faf9f5;
  --paper-2:    #f0eee6;
  --ink:        #141413;
  --ink-soft:   #3d3d3a;
  --muted:      #6e6e67;
  --hairline:   #e4e2d9;
  --hairline-2: #d6d4c9;
  --accent:     #d97757;
  --accent-deep:#c25e3e;
  --on-accent:  #faf9f5;
  --foot-bg:    #141413;
  --foot-text:  #9b998f;
  --foot-strong:#f5f4ee;

  --serif: 'Fraunces', 'Georgia', 'Times New Roman', serif;
  --mono:  'IBM Plex Mono', ui-monospace, 'SF Mono', 'Cascadia Code', Menlo, monospace;
  --sans:  ui-sans-serif, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue',
           'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

html[data-theme='dark'] {
  --paper:      #1b1a17;
  --paper-2:    #24221e;
  --ink:        #f5f4ee;
  --ink-soft:   #d6d4cb;
  --muted:      #9b998f;
  --hairline:   #35332c;
  --hairline-2: #45423a;
  --accent:     #e08b6d;
  --accent-deep:#d97757;
  --on-accent:  #1b1a17;
  --foot-bg:    #100f0d;
  --foot-text:  #8a887e;
  --foot-strong:#f5f4ee;
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme='light']) {
    --paper:      #1b1a17;
    --paper-2:    #24221e;
    --ink:        #f5f4ee;
    --ink-soft:   #d6d4cb;
    --muted:      #9b998f;
    --hairline:   #35332c;
    --hairline-2: #45423a;
    --accent:     #e08b6d;
    --accent-deep:#d97757;
    --on-accent:  #1b1a17;
    --foot-bg:    #100f0d;
    --foot-text:  #8a887e;
    --foot-strong:#f5f4ee;
  }
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  background: var(--paper);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  transition: background 0.35s ease, color 0.35s ease;
}

::selection { background: var(--accent); color: var(--on-accent); }

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--paper); }
::-webkit-scrollbar-thumb { background: var(--hairline-2); border-radius: 5px; border: 2px solid var(--paper); }
::-webkit-scrollbar-thumb:hover { background: var(--muted); }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 clamp(20px, 5vw, 40px); }

.sr-only {
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap;
}

.skip-link {
  position: absolute; left: 16px; top: -64px; z-index: 100;
  padding: 10px 18px; border-radius: 999px;
  background: var(--ink); color: var(--paper);
  font-family: var(--mono); font-size: 12px; text-decoration: none;
  transition: top 0.25s var(--ease-out);
}
.skip-link:focus-visible { top: 14px; }

a { color: inherit; }

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

/* ---------- Reveal animation ---------- */
.rv {
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity 0.8s var(--ease-out) var(--d, 0s),
    transform 0.8s var(--ease-out) var(--d, 0s);
}
.rv.in { opacity: 1; transform: none; }

/* ---------- Header ---------- */
.site-head {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--hairline);
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.head-inner {
  display: flex;
  align-items: center;
  gap: 2rem;
  height: 68px;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--mono);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.12em;
  text-decoration: none;
  color: var(--ink);
}
.wordmark .mark { width: 19px; height: 19px; color: var(--accent); }

.site-nav {
  display: flex;
  gap: 1.8rem;
  margin-left: auto;
}
.site-nav a {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--muted);
  transition: color 0.2s ease;
}
.site-nav a:hover { color: var(--ink); }

/* ---------- Buttons (capsules) ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.72em 1.45em;
  border: 1px solid var(--hairline-2);
  border-radius: 999px;
  background: transparent;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition:
    background 0.25s var(--ease-out),
    border-color 0.25s var(--ease-out),
    color 0.25s var(--ease-out),
    transform 0.25s var(--ease-out);
}
.btn svg { width: 15px; height: 15px; flex: none; }
.btn:hover { border-color: var(--ink); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}
.btn-primary:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
}

.btn-small { padding: 0.55em 1.15em; font-size: 13px; }

.btn-icon {
  width: 44px;
  height: 44px;
  padding: 0;
  justify-content: center;
  border-radius: 50%;
  position: relative;
}
.btn-icon .icon-check { display: none; color: var(--accent); }
.btn-icon.copied { border-color: var(--accent); }
.btn-icon.copied .icon-copy { display: none; }
.btn-icon.copied .icon-check { display: block; }

.btn-arr {
  font-size: 12px;
  color: var(--muted);
  transition: color 0.2s ease, transform 0.25s var(--ease-out);
}
.btn:hover .btn-arr { color: var(--accent); transform: translate(1px, -1px); }

/* ---------- Eyebrow labels ---------- */
.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}
.eyebrow-num { color: var(--accent); }
.eyebrow-num::after { content: '—'; margin-left: 0.65rem; color: var(--hairline-2); }

.pulse {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  flex: none;
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.82); }
}

/* ---------- Hero ---------- */
.hero {
  padding-top: clamp(5.5rem, 11vw, 9rem);
  padding-bottom: clamp(3.5rem, 7vw, 5.5rem);
}

.hero-name {
  margin-top: 1.6rem;
  font-family: var(--serif);
  font-weight: 480;
  font-size: clamp(3.6rem, 9vw, 7rem);
  line-height: 1.0;
  letter-spacing: -0.025em;
  font-optical-sizing: auto;
}

.hero-id {
  display: flex;
  align-items: baseline;
  gap: 1.1rem;
  flex-wrap: wrap;
  margin-top: 1.6rem;
}
.hero-id .cjk {
  font-size: 1.15rem;
  font-weight: 500;
  letter-spacing: 0.55em;
  color: var(--ink);
}
.hero-id-sep { color: var(--hairline-2); font-weight: 300; }
.hero-id .mono {
  font-family: var(--mono);
  font-size: 0.95rem;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.hero-tag {
  margin-top: 1.8rem;
  font-family: var(--serif);
  font-size: clamp(1.25rem, 2.6vw, 1.6rem);
  font-optical-sizing: auto;
  color: var(--accent);
}
.hero-tag em { font-style: italic; font-weight: 400; }

/* ---------- Stats ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}
.stat {
  padding: clamp(1.8rem, 4vw, 2.8rem) 1.5rem;
  text-align: center;
}
.stat + .stat { border-left: 1px solid var(--hairline); }
.stat-num {
  display: block;
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(2.4rem, 5.5vw, 3.6rem);
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: lining-nums;
}
.stat-label {
  display: block;
  margin-top: 0.7rem;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---------- Sections ---------- */
.section { padding-top: clamp(6rem, 11vw, 9rem); }

.section-title {
  margin-top: 1.4rem;
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(1.9rem, 4.2vw, 2.8rem);
  line-height: 1.12;
  letter-spacing: -0.015em;
  font-optical-sizing: auto;
  max-width: 22ch;
}

/* ---------- Registry ---------- */
.reg-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: clamp(2.5rem, 6vw, 4.5rem);
  margin-top: clamp(2.2rem, 5vw, 3.2rem);
  border-top: 1px solid var(--hairline);
}

.reg-row {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  padding: 0.95rem 0.5rem;
  border-bottom: 1px solid var(--hairline);
  text-decoration: none;
  transition: background 0.2s ease, padding 0.25s var(--ease-out);
}
.reg-row:hover { background: var(--paper-2); padding-left: 0.9rem; padding-right: 0.9rem; }

.reg-idx {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  flex: none;
}
.reg-host {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--ink);
  transition: color 0.2s ease;
}
.reg-row:hover .reg-host { color: var(--accent-deep); }

.reg-dots {
  flex: 1;
  border-bottom: 1px dotted var(--hairline-2);
  transform: translateY(-4px);
}

.reg-tag {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--hairline);
  border-radius: 999px;
  padding: 0.28em 0.85em;
  flex: none;
  transition: border-color 0.2s ease, color 0.2s ease;
}
.reg-row:hover .reg-tag { border-color: var(--accent); color: var(--accent); }

.reg-arr {
  font-size: 13px;
  color: var(--accent);
  opacity: 0;
  transform: translateX(-5px);
  transition: opacity 0.25s ease, transform 0.25s var(--ease-out);
  flex: none;
}
.reg-row:hover .reg-arr,
.reg-row:focus-visible .reg-arr { opacity: 1; transform: none; }

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(2rem, 5vw, 3.5rem);
  margin-top: clamp(2.4rem, 5vw, 3.4rem);
}

.about-col {
  border-top: 1px solid var(--hairline);
  padding-top: 1.6rem;
  position: relative;
}
.about-idx {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
}
.about-icon {
  width: 27px; height: 27px;
  color: var(--accent);
  margin: 1.1rem 0 1.2rem;
}
.about-col h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1.35rem;
  letter-spacing: -0.01em;
  margin-bottom: 0.55rem;
}
.about-col p {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--ink-soft);
}
.about-meta {
  margin-top: 1.1rem;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
}
.about-meta::before {
  content: '';
  display: inline-block;
  width: 14px; height: 1px;
  background: var(--accent);
  margin-right: 0.6rem;
  vertical-align: middle;
}

/* ---------- Connect ---------- */
.connect-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: clamp(2.2rem, 5vw, 3rem);
}
.connect-sep {
  width: 1px;
  height: 26px;
  background: var(--hairline-2);
  margin: 0 0.5rem;
}

#connect { padding-bottom: clamp(7rem, 12vw, 10rem); }

/* ---------- Footer ---------- */
.site-foot {
  background: var(--foot-bg);
  color: var(--foot-text);
  transition: background 0.35s ease;
}
.foot-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.8rem 2rem;
  padding-top: 2.6rem;
  padding-bottom: 2.6rem;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}
.foot-strong { color: var(--foot-strong); }
.heart { color: var(--accent); font-style: normal; }

/* ---------- Responsive ---------- */
@media (max-width: 760px) {
  .head-inner { gap: 1.1rem; height: 60px; }
  .site-nav { display: none; }
  .site-head .btn-small { margin-left: auto; }

  .reg-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }

  .hero-id .cjk { letter-spacing: 0.4em; }
  .stat { padding: 1.5rem 0.6rem; }
  .connect-sep { display: none; }
}

/* ---------- Reduced / disabled motion ---------- */
.no-anim .rv { opacity: 1 !important; transform: none !important; transition: none !important; }
.no-anim .pulse { animation: none !important; }
.no-anim *, .no-anim *::before, .no-anim *::after { transition-duration: 0.01ms !important; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .rv { opacity: 1 !important; transform: none !important; transition: none !important; }
  .pulse { animation: none; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}