:root {
  --bg: #f6f8fa;
  --bg-deep: #edf0f4;
  --paper: #ffffff;
  --paper-inset: #eef1f5;
  --ink: #16181d;
  --ink-soft: #5b6472;
  --ink-faint: #8b93a1;
  --line: rgba(23, 32, 43, 0.14);
  --line-soft: rgba(23, 32, 43, 0.08);
  --accent: #0e7490;
  --oss: #5b6472;
  --link: #0066cc;
  --link-hover: #0052a3;
  --accent-soft: rgba(14, 116, 144, 0.12);
  --radius: 10px;
  --header-h: 56px;
  --safe-top: env(safe-area-inset-top, 0px);
  --font: 'IBM Plex Sans', 'Segoe UI', sans-serif;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg: #14161a;
  --bg-deep: #0f1113;
  --paper: #1d2127;
  --paper-inset: #262b34;
  --ink: #f5f7fa;
  --ink-soft: #a9b1bd;
  --ink-faint: #8b93a1;
  --line: rgba(235, 240, 246, 0.14);
  --line-soft: rgba(235, 240, 246, 0.08);
  --accent: #3db8cd;
  --oss: #a9b1bd;
  --link: #66b0ff;
  --link-hover: #7fbcff;
  --accent-soft: rgba(61, 184, 205, 0.16);
  color-scheme: dark;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  margin: 0;
  background:
    radial-gradient(1200px 600px at 10% -10%, color-mix(in srgb, var(--accent) 8%, transparent), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, color-mix(in srgb, var(--bg-deep) 80%, transparent), transparent 50%),
    var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 15.5px;
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  padding-bottom: env(safe-area-inset-bottom, 0px);
  transition: background-color .3s ease, color .3s ease;
}

a { color: inherit; }
h1, h2, h3 { margin: 0; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 28px; }
@media (max-width: 640px) { .wrap { padding: 0 16px; } }

/* ---------- top bar ---------- */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 40;
  height: calc(var(--header-h) + var(--safe-top));
  padding-top: var(--safe-top);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border-bottom: 1px solid var(--line-soft);
  transform: translateY(0);
  transition: transform 0.28s var(--ease);
}
.topbar.is-hidden { transform: translateY(-100%); }

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.mark {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
}
.mark .chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 7px;
  background: var(--ink);
  color: var(--bg);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.mark .name { color: var(--ink); }

.topbar-right { display: flex; align-items: center; gap: 10px; }
.contact-icons { display: flex; gap: 4px; }
.contact-icons a {
  display: flex;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  color: var(--ink-soft);
  border-radius: 8px;
  transition: color .15s ease, background-color .15s ease;
}
.contact-icons a:hover { color: var(--ink); background: var(--accent-soft); }
.contact-icons svg { width: 20px; height: 20px; }

.theme-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
  flex-shrink: 0;
  padding: 0;
  transition: color .15s ease, background-color .15s ease;
}
.theme-btn:hover { color: var(--ink); background: var(--accent-soft); }
.theme-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.theme-btn svg { width: 20px; height: 20px; display: block; }
.theme-btn .icon-sun { display: none; }
.theme-btn .icon-moon { display: block; }
:root[data-theme="dark"] .theme-btn .icon-sun { display: block; }
:root[data-theme="dark"] .theme-btn .icon-moon { display: none; }

.top-spacer {
  height: calc(var(--header-h) + var(--safe-top));
}

/* ---------- hero ---------- */
.hero {
  padding: 32px 0 24px;
  border-bottom: 1px solid var(--line-soft);
}

h1.name {
  font-size: clamp(1.4rem, 3.2vw, 1.8rem);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 6px;
}

h1.name .experience {
  font-size: 1rem;
  font-weight: 500;
  color: var(--oss);
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.role-line {
  font-size: 1rem;
  color: var(--ink-soft);
  font-weight: 400;
  margin: 0;
}

/* ---------- grid ---------- */
.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  padding: 18px 0 80px;
}

.card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 2px);
  background: var(--paper);
  overflow: hidden;
  display: flex;
  flex-direction: row;
  transition: border-color .25s ease, transform .25s var(--ease), background .25s ease;
  content-visibility: auto;
  contain-intrinsic-size: auto 180px;
}
.card:hover {
  border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
  transform: translateY(-2px);
}
@media (max-width: 640px) {
  .card { flex-direction: column; }
}

.card-media {
  position: relative;
  background: var(--paper);
  border-bottom: 1px solid var(--line-soft);
  flex: 0 0 220px;
  width: 220px;
  min-height: 168px;
  align-self: stretch;
  border-right: 1px solid var(--line-soft);
  overflow: hidden;
}
.card-media a,
.card-media > div {
  position: absolute;
  inset: 0;
  display: block;
}
.card-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  padding: 14px;
  opacity: 0;
  transition: opacity .4s ease, transform .45s var(--ease);
  position: relative;
  z-index: 2;
}
.card:hover .card-media img.is-loaded {
  transform: scale(1.03);
}
.card-media img.is-loaded { opacity: 1; }

.card-media::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    var(--paper-inset) 0%,
    color-mix(in srgb, var(--ink-faint) 14%, var(--paper-inset)) 50%,
    var(--paper-inset) 100%
  );
  background-size: 200% 100%;
  animation: skeleton-shine 1.4s ease-in-out infinite;
  z-index: 1;
}
.card-media.has-image::before {
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s ease;
}
@keyframes skeleton-shine {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

@media (max-width: 640px) {
  .card-media {
    flex: 0 0 auto;
    width: 100%;
    height: 148px;
    min-height: 148px;
    border-right: none;
  }
}

.card-body {
  padding: 16px 18px 17px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
  min-width: 0;
}

.card-title {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.01em;
}
.card-title a {
  text-decoration: none;
  transition: color .15s ease;
  color: var(--link);
}
.card-title-oss {
  font-size: 11.5px;
  font-weight: 400;
  color: var(--oss);
  white-space: nowrap;
  margin-left: 6px;
}
.card-title a:hover { color: var(--link-hover); }
.card-title span { cursor: default; }

.card-detail {
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.55;
}
.card-detail p { margin: 0 0 4px; }
.card-detail p:last-child { margin-bottom: 0; }
.card-detail-pre {
  white-space: pre;
  font-family: 'Consolas', 'SFMono-Regular', monospace;
  font-size: 12.5px;
  line-height: 1.55;
}

.card-info {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
  padding-top: 10px;
}
.info-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11.5px;
  color: var(--ink-soft);
  background: var(--paper-inset);
  border-radius: 7px;
  padding: 4px 9px;
  font-weight: 500;
}
.info-badge-tasks {
  flex-basis: 100%;
}

.card-variants {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 2px 0 0;
}
.card-variants a {
  font-size: 12.5px;
  color: var(--link);
  text-decoration: none;
  padding: 3px 0;
  border-bottom: 1px dashed var(--line-soft);
  transition: color .15s ease;
}
.card-variants a:hover { color: var(--link-hover); }

.empty-state {
  text-align: center;
  padding: 72px 20px;
  color: var(--ink-faint);
  font-size: 14px;
}

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

/* card enter */
.card.is-entering {
  opacity: 0;
  transform: translateY(12px);
}
.card.is-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity .45s var(--ease), transform .45s var(--ease), border-color .25s ease;
}
.card.is-visible:hover {
  transform: translateY(-2px);
}

@media (prefers-reduced-motion: reduce) {
  .card-media::before,
  .card.is-entering,
  .card.is-visible,
  .card:hover,
  .card:hover .card-media img.is-loaded {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
  html { scroll-behavior: auto; }
}

@media (max-width: 640px) {
  body { font-size: 15px; }
  .hero { padding: 22px 0 18px; }
  .mark { font-size: 0.95rem; }
  h1.name .experience { font-size: 0.95rem; }
  h1.name { font-size: 1.3rem; }
  .role-line { font-size: 0.95rem; }
  .card-title { font-size: 15px; }
  .card-detail { font-size: 13px; }
  .contact-icons a { width: 36px; height: 36px; }
}