:root {
  --bg: #f4f5f7;
  --paper: #ffffff;
  --ink: #111827;
  --text: #1f2937;
  --muted: #5f6b7a;
  --line: #d9dee7;
  --soft-line: #edf0f4;
  --blue: #2563eb;
  --blue-soft: #eff6ff;
  --shadow: 0 16px 50px rgba(15, 23, 42, 0.08);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

.mode-switch {
  position: fixed;
  top: 18px;
  right: 22px;
  z-index: 20;
  display: inline-flex;
  padding: 3px;
  gap: 2px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
  backdrop-filter: blur(12px);
}
.mode-switch button {
  border: 0;
  background: transparent;
  color: #475569;
  min-width: 54px;
  padding: 7px 12px;
  border-radius: 999px;
  font: 600 13px/1 var(--font);
  cursor: pointer;
}
.mode-switch button[aria-pressed="true"] { background: var(--ink); color: #fff; }

.page { min-height: 100vh; padding: 28px 16px 56px; }
.resume-sheet {
  width: min(920px, 100%);
  margin: 0 auto;
  padding: 42px 48px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: var(--shadow);
}
.resume-header {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px;
  padding-bottom: 18px;
  border-bottom: 2px solid var(--ink);
}
.resume-header h1 {
  margin: 0;
  color: var(--ink);
  font-size: 30px;
  line-height: 1.15;
  letter-spacing: -0.6px;
}
.resume-header h1 span { color: #6b7280; font-size: 20px; font-weight: 500; }
.role { margin: 8px 0 0; color: var(--ink); font-size: 16px; font-weight: 650; }
.meta { margin: 4px 0 0; color: var(--muted); }
.contact-block {
  display: grid;
  gap: 5px;
  align-content: start;
  font-style: normal;
  text-align: right;
  font-size: 13px;
}
.disabled-link { color: #9ca3af; pointer-events: none; }
.resume-section { padding: 18px 0 0; }
.resume-section + .resume-section { margin-top: 2px; }
.resume-section h2 {
  margin: 0 0 10px;
  padding-bottom: 5px;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  font-size: 17px;
  line-height: 1.25;
  letter-spacing: -0.2px;
}
.summary-section p { margin: 0; }
ul { margin: 0; padding-left: 18px; }
li + li { margin-top: 4px; }
.compact-list li { margin-top: 3px; }
strong { color: var(--ink); }
.experience-item, .project-entry { padding: 2px 0 12px; }
.experience-item + .experience-item, .project-entry + .project-entry { border-top: 1px solid var(--soft-line); padding-top: 12px; }
.experience-item.small { padding-bottom: 8px; }
.item-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 4px;
}
.item-head h3, .project-entry h3 {
  margin: 0;
  color: var(--ink);
  font-size: 15px;
  line-height: 1.35;
}
.item-head span { color: var(--muted); white-space: nowrap; font-size: 13px; }
.experience-item p, .project-entry p { margin: 0 0 6px; }
.stack { color: var(--muted); font-size: 13px; }
.education-line p { margin: 0; }

.home-view { display: none; }
.page[data-mode="home"] {
  background: #ffffff;
  color: #111827;
}
.page[data-mode="home"] .resume-sheet { display: none; }
.page[data-mode="home"] .home-view {
  display: block;
  width: min(1040px, 100%);
  margin: 0 auto;
  padding: 64px 0 32px;
}
.home-hero {
  padding: 46px 0 56px;
  border-bottom: 1px solid var(--line);
}
.eyebrow {
  margin: 0 0 12px;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.home-hero h1 {
  max-width: 820px;
  margin: 0;
  color: #0f172a;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.05;
  letter-spacing: -2.2px;
}
.home-hero p:not(.eyebrow) {
  max-width: 720px;
  margin: 22px 0 0;
  color: #4b5563;
  font-size: 18px;
  line-height: 1.8;
}
.home-actions { display: flex; gap: 10px; margin-top: 28px; }
.home-actions a {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 14px;
  border-radius: 8px;
  border: 1px solid var(--line);
  color: var(--ink);
  font-weight: 600;
}
.home-actions a:first-child { background: var(--ink); color: #fff; border-color: var(--ink); }
.home-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  padding: 34px 0;
}
.home-grid article {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
}
.home-grid span { color: var(--blue); font-family: var(--mono); font-size: 12px; }
.home-grid h2 { margin: 10px 0 8px; font-size: 18px; color: var(--ink); }
.home-grid p { margin: 0; color: var(--muted); }
.home-projects { padding-top: 18px; border-top: 1px solid var(--line); }
.home-projects h2 { margin: 0 0 16px; font-size: 24px; letter-spacing: -0.6px; }
.home-project-row {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 20px;
  padding: 15px 0;
  border-top: 1px solid var(--soft-line);
}
.home-project-row span { color: var(--muted); }

@media print {
  body { background: #fff; font-size: 12px; }
  .mode-switch, .home-view { display: none !important; }
  .page { padding: 0; }
  .resume-sheet { width: 100%; border: 0; box-shadow: none; border-radius: 0; padding: 0; }
  a { color: #111827; }
}

@media (max-width: 760px) {
  .mode-switch { top: 10px; right: 10px; }
  .page { padding: 56px 10px 28px; }
  .resume-sheet { padding: 24px 20px; border-radius: 8px; }
  .resume-header { grid-template-columns: 1fr; gap: 12px; }
  .contact-block { text-align: left; }
  .item-head { display: block; }
  .item-head span { display: block; margin-top: 2px; }
  .home-grid { grid-template-columns: 1fr; }
  .home-project-row { grid-template-columns: 1fr; gap: 4px; }
}