:root {
  --bg: #8ED0FA;
  --bg-sub: #A9DCFB;
  --surface: #FFFFFF;
  --text: #181C28;
  --text-sub: #3E4863;
  --accent: #181C28;
  --muted: #9AA6C9;
  --ring: #FFFFFF;
  --shadow: 0 10px 30px rgba(24, 28, 40, 0.12);
  --radius: 18px;
}

:root[data-theme="dark"] {
  --bg: #181C28;
  --bg-sub: #20263A;
  --surface: #262D44;
  --text: #EEF4FB;
  --text-sub: #B5C0DC;
  --accent: #8ED0FA;
  --muted: #5E6B94;
  --ring: #8ED0FA;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: "Inter", "Noto Sans JP", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.8;
  transition: background .4s, color .4s;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ---------- Nav ---------- */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 16px clamp(16px, 4vw, 40px);
  transition: background .3s, box-shadow .3s;
}
.nav.is-scrolled {
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 color-mix(in srgb, var(--text) 10%, transparent);
}
.nav__logo { font-weight: 800; letter-spacing: .05em; margin-right: auto; }
.nav__links { display: flex; gap: 24px; font-weight: 600; font-size: .95rem; }
.nav__links a { position: relative; }
.nav__links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px;
  width: 100%; height: 2px; background: currentColor;
  transform: scaleX(0); transform-origin: right; transition: transform .3s;
}
.nav__links a:hover::after { transform: scaleX(1); transform-origin: left; }

.theme-toggle {
  display: grid; place-items: center;
  width: 40px; height: 40px;
  border: none; border-radius: 50%;
  background: color-mix(in srgb, var(--text) 8%, transparent);
  color: var(--text); cursor: pointer;
  transition: background .3s;
}
.theme-toggle:hover { background: color-mix(in srgb, var(--text) 16%, transparent); }
.icon-sun { display: none; }
:root[data-theme="dark"] .icon-sun { display: block; }
:root[data-theme="dark"] .icon-moon { display: none; }

/* ---------- Hero ---------- */
.hero {
  min-height: 100svh;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center;
  padding: 96px 16px 64px;
  position: relative;
}

.avatar {
  width: clamp(160px, 38vw, 220px);
  aspect-ratio: 1;
  border-radius: 50%;
  padding: 6px;
  background: var(--ring);
  box-shadow: var(--shadow);
  animation: pop-in .9s cubic-bezier(.2, .9, .3, 1.3) both;
  transition: transform .4s;
}
.avatar img {
  display: block; width: 100%; height: 100%;
  border-radius: 50%; object-fit: cover;
}
.avatar:hover { animation: sway 1.6s ease-in-out infinite; }

.hero__name {
  margin-top: 28px;
  font-size: clamp(2rem, 7vw, 3.2rem);
  font-weight: 800; letter-spacing: .02em; line-height: 1.2;
  animation: fade-up .8s .3s both;
}
.hero__role {
  margin-top: 6px;
  color: var(--text-sub); font-weight: 500;
  animation: fade-up .8s .45s both;
}

.social {
  display: flex; gap: 14px; margin-top: 28px;
  animation: fade-up .8s .6s both;
}
.social a {
  display: grid; place-items: center;
  width: 46px; height: 46px; border-radius: 50%;
  background: var(--surface); color: var(--text);
  box-shadow: var(--shadow);
  transition: transform .25s, background .25s, color .25s;
}
.social a:hover { transform: translateY(-4px); background: var(--accent); color: var(--bg); }
.social svg { width: 20px; height: 20px; }

.scroll-hint {
  position: absolute; bottom: 28px;
  display: flex; flex-direction: column; align-items: center;
  font-size: .75rem; letter-spacing: .2em; color: var(--text-sub);
  animation: bounce 2s ease-in-out infinite;
}

/* ---------- Sections ---------- */
.section {
  max-width: 960px; margin: 0 auto;
  padding: 88px 16px;
}
.section__title {
  font-size: clamp(1.6rem, 5vw, 2.2rem);
  font-weight: 800; text-align: center; margin-bottom: 40px;
}
.section__title::after {
  content: ""; display: block;
  width: 36px; height: 4px; margin: 10px auto 0;
  border-radius: 2px; background: var(--accent);
}

.about {
  background: var(--surface);
  border-radius: var(--radius);
  padding: clamp(24px, 5vw, 44px);
  box-shadow: var(--shadow);
}
.skills { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.skills li {
  padding: 4px 14px; border-radius: 999px;
  font-size: .85rem; font-weight: 600;
  background: color-mix(in srgb, var(--muted) 30%, transparent);
}

.works {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.card {
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform .3s, box-shadow .3s;
}
.card { display: flex; flex-direction: column; }
.card:hover { transform: translateY(-6px); }
.card:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
.card__thumb {
  aspect-ratio: 16 / 10;
  display: grid; place-items: center;
  font-size: 2.4rem; font-weight: 800; color: rgba(255,255,255,.85);
  background: linear-gradient(135deg, var(--c1), var(--c2));
}
.card__body { padding: 20px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.card__link {
  margin-top: auto; padding-top: 14px;
  font-size: .85rem; font-weight: 600; color: var(--text);
}
.card:hover .card__link { text-decoration: underline; }
.card__links { display: flex; flex-wrap: wrap; gap: 4px 16px; margin-top: auto; }
.card__links .card__link { margin-top: 0; }
article.card:hover .card__link { text-decoration: none; }
article.card .card__link:hover { text-decoration: underline; }
.card--ended:hover { transform: none; }
.card--ended .card__thumb { filter: grayscale(.6); opacity: .7; }
.card__status {
  align-self: flex-start;
  margin-top: auto; padding: 3px 12px;
  border-radius: 999px;
  font-size: .78rem; font-weight: 600;
  color: var(--text-sub);
  background: color-mix(in srgb, var(--muted) 30%, transparent);
}
.card--ended .card__tags { margin-bottom: 14px; }
.card__body h3 { font-size: 1.1rem; }
.card__body p { margin-top: 6px; font-size: .92rem; color: var(--text-sub); }
.card__tags { display: block; margin-top: 12px; font-size: .8rem; font-weight: 600; color: var(--text-sub); opacity: .75; }

.contact { text-align: center; }
.btn {
  display: inline-block; margin-top: 20px;
  padding: 14px 32px; border-radius: 999px;
  background: var(--accent); color: var(--bg);
  font-weight: 600;
  box-shadow: var(--shadow);
  transition: transform .25s;
}
.btn:hover { transform: translateY(-3px); }

.footer {
  text-align: center; padding: 32px 16px 40px;
  color: var(--text-sub);
}

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s, transform .7s; }
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- Keyframes ---------- */
@keyframes pop-in { from { opacity: 0; transform: scale(.6); } to { opacity: 1; transform: scale(1); } }
@keyframes fade-up { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }
@keyframes sway { 0%,100% { transform: rotate(0); } 25% { transform: rotate(-4deg); } 75% { transform: rotate(4deg); } }
@keyframes bounce { 0%,100% { transform: translateY(0); } 50% { transform: translateY(6px); } }

@media (max-width: 560px) {
  .nav__links { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}