/* ============================================================
   SIXYUAN.CC — shared design tokens
   Derived from resume.sixyuan.cc (--primary #0066cc / --accent #ff6b6b)
   ============================================================ */
:root {
  color-scheme: light;

  --paper:        #f6f6f3;
  --surface:      #fffefb;
  --surface-2:    #f0f0ec;
  --ink:          #16181d;
  --ink-2:        #4c515b;
  --ink-3:        #8a909b;
  --line:         rgba(22, 24, 29, .12);
  --line-strong:  rgba(22, 24, 29, .24);
  --blue:         #0066cc;
  --blue-ink:     #ffffff;
  --blue-soft:    rgba(0, 102, 204, .08);
  --coral:        #d94f4f;
  --coral-soft:   rgba(255, 107, 107, .12);

  --shadow-sm: 0 1px 2px rgba(22, 24, 29, .04);
  --shadow:    0 10px 40px rgba(22, 24, 29, .07);
  --radius:    18px;
  --radius-sm: 10px;

  --font-sans:  -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --font-serif: "Songti SC", "STSong", "Noto Serif CJK SC", "Source Han Serif SC", "SimSun", Georgia, serif;
  --font-mono:  "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --ease: cubic-bezier(.2, 0, .2, 1);
  --dur:  .32s;
}

[data-theme="dark"] {
  color-scheme: dark;
  --paper:       #101216;
  --surface:     #171a20;
  --surface-2:   #1e222a;
  --ink:         #eceef3;
  --ink-2:       #a9b0bd;
  --ink-3:       #717987;
  --line:        rgba(236, 238, 243, .13);
  --line-strong: rgba(236, 238, 243, .26);
  --blue:        #62a6ff;
  --blue-ink:    #0a1524;
  --blue-soft:   rgba(98, 166, 255, .12);
  --coral:       #ff8b8b;
  --coral-soft:  rgba(255, 139, 139, .12);
  --shadow:      0 10px 40px rgba(0, 0, 0, .35);
  --shadow-sm:   0 1px 2px rgba(0, 0, 0, .3);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --paper:       #101216;
    --surface:     #171a20;
    --surface-2:   #1e222a;
    --ink:         #eceef3;
    --ink-2:       #a9b0bd;
    --ink-3:       #717987;
    --line:        rgba(236, 238, 243, .13);
    --line-strong: rgba(236, 238, 243, .26);
    --blue:        #62a6ff;
    --blue-ink:    #0a1524;
    --blue-soft:   rgba(98, 166, 255, .12);
    --coral:       #ff8b8b;
    --coral-soft:  rgba(255, 139, 139, .12);
    --shadow:      0 10px 40px rgba(0, 0, 0, .35);
    --shadow-sm:   0 1px 2px rgba(0, 0, 0, .3);
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; border-radius: 4px; }
::selection { background: var(--blue-soft); }

.wrap { width: min(1120px, 100% - 48px); margin-inline: auto; }
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-3);
}

/* ---------- top bar ---------- */
.topbar {
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(14px);
  position: sticky; top: 0; z-index: 20;
}
.topbar-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px; min-height: 64px;
}
.wordmark { display: flex; align-items: baseline; gap: 12px; }
.wordmark b {
  font-family: var(--font-mono);
  font-size: 14px; font-weight: 600; letter-spacing: .1em;
}
.wordmark span { font-size: 12px; color: var(--ink-3); letter-spacing: .08em; }
.topbar-right { display: flex; align-items: center; gap: 8px; }
.tb-link {
  font-size: 13px; color: var(--ink-2); padding: 8px 12px;
  border-radius: 8px; transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.tb-link:hover { background: var(--blue-soft); color: var(--blue); }

.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; padding: 0;
  border: 1px solid var(--line); border-radius: 9px;
  background: var(--surface); color: var(--ink-2);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.theme-toggle:hover { border-color: var(--blue); color: var(--blue); transform: translateY(-1px); }
.theme-toggle svg { width: 17px; height: 17px; }

/* ---------- nav hub ---------- */
.hero { padding: clamp(56px, 9vw, 112px) 0 clamp(40px, 6vw, 72px); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) 220px; gap: 40px; align-items: end; }
.hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(52px, 8.4vw, 104px);
  line-height: 1.06;
  font-weight: 600;
  letter-spacing: -.02em;
  margin: 22px 0 0;
  text-wrap: pretty;
}
.hero h1 em { font-style: normal; color: var(--blue); }
.hero-sub {
  font-size: clamp(16px, 1.7vw, 19px);
  color: var(--ink-2);
  max-width: 42ch;
  margin: 0;
  text-wrap: pretty;
}
.hero-meta {
  border-left: 1px solid var(--line-strong);
  padding-left: 22px;
  display: grid; gap: 18px;
}
.hero-meta div { display: grid; gap: 2px; }
.hero-meta strong {
  font-family: var(--font-mono); font-size: 30px; font-weight: 500;
  line-height: 1.1; letter-spacing: -.04em; color: var(--ink);
}
.hero-meta small { font-size: 12px; color: var(--ink-3); letter-spacing: .06em; }

.section-head {
  display: flex; align-items: baseline; justify-content: space-between; gap: 16px;
  padding-bottom: 14px; border-bottom: 1px solid var(--line-strong); margin-bottom: 8px;
}
.section-head h2 { font-size: 15px; font-weight: 600; letter-spacing: .02em; margin: 0; }
.section-head span { font-family: var(--font-mono); font-size: 11px; color: var(--ink-3); }

/* destination rows */
.dest {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr) 200px;
  gap: clamp(16px, 3vw, 40px);
  align-items: center;
  padding: 34px 4px;
  border-bottom: 1px solid var(--line);
  transition: background var(--dur) var(--ease), padding var(--dur) var(--ease);
}
.dest:hover { background: var(--blue-soft); padding-inline: 16px; }
.dest-num {
  font-family: var(--font-mono);
  font-size: 13px; color: var(--ink-3); letter-spacing: .08em;
  align-self: start; padding-top: 6px;
}
.dest-name { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; }
.dest-name h3 {
  font-family: var(--font-serif); font-size: clamp(26px, 3.2vw, 38px);
  font-weight: 600; letter-spacing: -.01em; margin: 0;
}
.dest-name .tag { font-family: var(--font-mono); font-size: 11px; color: var(--blue); letter-spacing: .1em; }
.dest p { margin: 10px 0 14px; color: var(--ink-2); font-size: 15px; max-width: 62ch; text-wrap: pretty; }
.dest-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.dest-tags span {
  font-size: 11px; color: var(--ink-3); border: 1px solid var(--line);
  border-radius: 999px; padding: 3px 10px;
}
.dest-action { display: grid; gap: 8px; justify-items: stretch; }
.btn-go {
  display: inline-flex; align-items: center; justify-content: space-between; gap: 12px;
  background: var(--blue); color: var(--blue-ink);
  border: 1px solid var(--blue); border-radius: 10px;
  padding: 13px 16px; font-size: 14px; font-weight: 600;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), filter var(--dur) var(--ease);
}
.btn-go:hover { transform: translateY(-2px); box-shadow: var(--shadow); filter: brightness(1.06); }
.btn-go span:last-child { font-size: 17px; line-height: 1; }
.btn-go.secondary { background: transparent; color: var(--blue); }
.btn-go.secondary:hover { background: var(--blue); color: var(--blue-ink); }
.dest-note { font-size: 11px; color: var(--ink-3); text-align: right; }

/* quick links */
.quick { padding: clamp(48px, 7vw, 84px) 0 clamp(40px, 6vw, 72px); }
.quick-grid { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.chip {
  display: inline-flex; align-items: center; gap: 9px;
  border: 1px solid var(--line); border-radius: 999px;
  background: var(--surface); padding: 9px 15px;
  font-size: 13px; color: var(--ink-2);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.chip:hover { border-color: var(--blue); color: var(--blue); transform: translateY(-2px); }
.chip i { font-family: var(--font-mono); font-style: normal; font-size: 10px; color: var(--ink-3); }
.chip:hover i { color: var(--blue); }

/* footer */
.footer { border-top: 1px solid var(--line); padding: 28px 0 40px; }
.footer-inner { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; align-items: center; }
.footer p { margin: 0; font-size: 12px; color: var(--ink-3); }
.footer nav { display: flex; gap: 18px; }
.footer a { font-size: 12px; color: var(--ink-2); }
.footer a:hover { color: var(--blue); }

.noscript-note {
  margin: 16px auto; padding: 12px 16px; border-radius: 10px;
  background: var(--coral-soft); color: var(--coral); font-size: 13px;
}

@media (max-width: 760px) {
  .wrap { width: min(1120px, 100% - 32px); }
  .hero-grid { grid-template-columns: 1fr; gap: 26px; }
  .hero-meta { border-left: 0; border-top: 1px solid var(--line); padding: 20px 0 0; grid-template-columns: repeat(2, 1fr); }
  .dest { grid-template-columns: 42px minmax(0, 1fr); gap: 12px; padding: 26px 0; }
  .dest-action { grid-column: 2; justify-items: start; }
  .dest-note { text-align: left; }
  .dest:hover { padding-inline: 8px; }
  .wordmark span { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}