@import url("/static/css/theme.css");

:root {
  --lp-ink: #18212b;
  --lp-ink-2: #3a4656;
  --lp-ink-3: #667486;
  --lp-ink-4: #93a0b0;
  --lp-paper: #f3f6f8;
  --lp-surface: #ffffff;
  --lp-line: rgba(24, 33, 43, 0.1);
  --lp-accent: #0f6e6a;
  --lp-accent-2: #1a8a84;
  --lp-serif: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --lp-sans: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;
  --lp-ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--lp-sans);
  background: var(--lp-paper);
  color: var(--lp-ink);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  line-height: 1.7;
}
button, input { font-family: inherit; }
a { color: inherit; }

.top-banner {
  position: fixed; top: 0; left: 0; right: 0; z-index: 500;
  background: var(--lp-accent); color: #fff;
  text-align: center; font-size: .82rem; font-weight: 600; padding: .55rem 1rem;
}
.top-banner-warn { background: #b7791f; }
.top-banner-error { background: #b53b4d; }

#mainNav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  height: 68px; display: flex; align-items: center;
  padding: 0 clamp(1.25rem, 4vw, 2.75rem);
  transition: background .25s var(--lp-ease), box-shadow .25s var(--lp-ease), border-color .25s;
  border-bottom: 1px solid transparent;
}
#mainNav.scrolled {
  background: rgba(243, 246, 248, .94);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--lp-line);
  box-shadow: 0 8px 28px rgba(28, 36, 48, .06);
}
.nav-logo { display: flex; align-items: center; gap: .55rem; text-decoration: none; }
.nav-logo-mark {
  width: 34px; height: 34px; border-radius: 9px;
  background: linear-gradient(145deg, #155e58, #0f6e6a);
  display: flex; align-items: center; justify-content: center;
}
.nav-logo-mark svg {
  width: 16px; height: 16px; stroke: #fff; fill: none;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
}
.nav-logo-text {
  font-family: var(--lp-serif);
  font-size: 1.2rem; font-weight: 700; letter-spacing: -.02em;
}
.nav-links { display: flex; align-items: center; gap: .15rem; margin-left: 2rem; flex: 1; }
.nav-link {
  color: var(--lp-ink-3); font-size: .84rem; font-weight: 500;
  text-decoration: none; padding: .4rem .75rem; border-radius: 8px;
  transition: color .15s, background .15s;
}
.nav-link:hover { color: var(--lp-ink); background: rgba(28, 36, 48, .05); }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: .65rem; }
.btn-nav-login, .btn-nav-start {
  font-size: .84rem; font-weight: 700; padding: .48rem 1.1rem;
  border-radius: 9px; cursor: pointer; transition: .15s ease;
}
.btn-nav-login {
  background: transparent; color: var(--lp-ink);
  border: 1px solid var(--lp-line);
}
.btn-nav-login:hover { background: rgba(28, 36, 48, .04); }
.btn-nav-start {
  background: var(--lp-ink); color: #fff; border: none;
}
.btn-nav-start:hover { background: #10161f; }

.hero {
  position: relative; min-height: 100vh;
  display: flex; flex-direction: column; justify-content: center;
  padding: 7.5rem clamp(1.25rem, 4vw, 2.75rem) 4.5rem;
  overflow: hidden;
}
.hero-atmosphere { position: absolute; inset: 0; pointer-events: none; }
.hero-wash {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 70% 55% at 18% 28%, rgba(15, 110, 106, .16), transparent 60%),
    radial-gradient(ellipse 55% 45% at 88% 18%, rgba(28, 36, 48, .08), transparent 55%),
    linear-gradient(165deg, #eef4f6 0%, #f3f6f8 42%, #e7eef2 100%);
}
.hero-grain {
  position: absolute; inset: 0; opacity: .35;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.45'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
}
.hero-panel {
  position: absolute; right: -6%; top: 12%; width: 48%; height: 76%;
  background: linear-gradient(140deg, rgba(255,255,255,.55), rgba(15,110,106,.08));
  border: 1px solid rgba(24, 33, 43, .06);
  border-radius: 28px 0 0 28px;
  transform: skewX(-4deg);
  animation: panel-in 1.1s var(--lp-ease) both;
}
@keyframes panel-in {
  from { opacity: 0; transform: skewX(-4deg) translateX(40px); }
  to { opacity: .92; transform: skewX(-4deg) translateX(0); }
}
.hero-inner {
  position: relative; z-index: 2;
  max-width: 1100px; margin: 0 auto; width: 100%;
  display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(300px, 380px);
  gap: clamp(2rem, 5vw, 4.5rem); align-items: center;
}
.hero-brand {
  font-family: var(--lp-serif);
  font-size: clamp(2.8rem, 6vw, 4.4rem);
  font-weight: 900; letter-spacing: -.04em; line-height: 1;
  color: var(--lp-ink);
  margin-bottom: 1.15rem;
  animation: rise 0.9s var(--lp-ease) both;
}
.hero-title {
  font-family: var(--lp-serif);
  font-size: clamp(1.55rem, 2.8vw, 2.15rem);
  font-weight: 600; line-height: 1.45; letter-spacing: -.02em;
  color: var(--lp-ink-2);
  margin-bottom: 1rem;
  animation: rise 0.9s var(--lp-ease) .08s both;
}
.hero-lead {
  font-size: 1.02rem; color: var(--lp-ink-3); max-width: 28rem;
  margin-bottom: 1.85rem; line-height: 1.85;
  animation: rise 0.9s var(--lp-ease) .16s both;
}
@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: none; }
}
.hero-cta {
  display: flex; flex-wrap: wrap; gap: .7rem;
  animation: rise 0.9s var(--lp-ease) .24s both;
}
.btn-hero-primary, .btn-hero-ghost {
  font-size: .92rem; font-weight: 700; padding: .85rem 1.45rem;
  border-radius: 10px; cursor: pointer; transition: .18s ease;
}
.btn-hero-primary {
  background: var(--lp-ink); color: #fff; border: none;
}
.btn-hero-primary:hover { background: #10161f; transform: translateY(-1px); }
.btn-hero-ghost {
  background: rgba(255, 255, 255, .55); color: var(--lp-ink);
  border: 1px solid var(--lp-line);
}
.btn-hero-ghost:hover { background: #fff; }

.join-panel {
  background: var(--lp-surface);
  border: 1px solid var(--lp-line);
  border-radius: 18px;
  padding: 1.65rem 1.55rem 1.5rem;
  box-shadow: 0 18px 50px rgba(28, 36, 48, .14);
  animation: rise 0.95s var(--lp-ease) .18s both;
  position: relative; z-index: 3;
}
.join-kicker {
  font-size: .68rem; font-weight: 700; letter-spacing: .14em;
  text-transform: uppercase; color: var(--lp-accent); margin-bottom: .35rem;
}
.join-heading {
  font-family: var(--lp-serif);
  font-size: 1.25rem; font-weight: 700; margin-bottom: .45rem;
}
.join-note {
  font-size: .82rem; color: var(--lp-ink-3); line-height: 1.65;
  margin-bottom: 1.05rem;
}
.join-label {
  display: block; font-size: .72rem; font-weight: 700;
  color: var(--lp-ink-3); margin-bottom: .4rem;
}
.join-input {
  width: 100%; border: 1.5px solid var(--lp-line); border-radius: 10px;
  background: var(--lp-paper); color: var(--lp-ink);
  font-size: 1.2rem; font-weight: 700; letter-spacing: .1em;
  padding: .85rem 1rem; outline: none; margin-bottom: .85rem;
  transition: border-color .15s, background .15s, box-shadow .15s;
}
.join-input:focus {
  border-color: var(--lp-accent);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(15, 110, 106, .15);
}
.join-input::placeholder {
  color: var(--lp-ink-4); font-weight: 500; letter-spacing: .04em; font-size: .95rem;
}
.btn-join {
  width: 100%; border: none; border-radius: 10px; cursor: pointer;
  background: var(--lp-accent); color: #fff;
  font-size: .95rem; font-weight: 800; padding: .95rem;
  transition: background .15s, transform .15s;
}
.btn-join:hover { background: var(--lp-accent-2); transform: translateY(-1px); }
.join-or {
  text-align: center; font-size: .72rem; color: var(--lp-ink-4);
  margin: 1rem 0 .75rem; position: relative;
}
.join-or::before, .join-or::after {
  content: ""; position: absolute; top: 50%; width: 28%; height: 1px;
  background: var(--lp-line);
}
.join-or::before { left: 0; }
.join-or::after { right: 0; }
.btn-join-researcher {
  width: 100%; border-radius: 10px; cursor: pointer;
  background: transparent; color: var(--lp-ink-2);
  border: 1px solid var(--lp-line);
  font-size: .88rem; font-weight: 600; padding: .82rem;
  transition: .15s ease;
}
.btn-join-researcher:hover { background: var(--lp-paper); color: var(--lp-ink); }

section { padding: clamp(3.75rem, 8vw, 5.5rem) clamp(1.25rem, 4vw, 2.75rem); }
.sec-shell { max-width: 1100px; margin: 0 auto; }
.sec-head { margin-bottom: 2rem; max-width: 36rem; }
.sec-kicker {
  font-size: .7rem; font-weight: 800; letter-spacing: .16em;
  text-transform: uppercase; color: var(--lp-accent); margin-bottom: .65rem;
}
.sec-title {
  font-family: var(--lp-serif);
  font-size: clamp(1.55rem, 3vw, 2.15rem);
  font-weight: 700; letter-spacing: -.03em; line-height: 1.3;
}
.sec-em { color: var(--lp-accent); }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.feature-card {
  padding: 1.35rem 1.25rem;
  background: var(--lp-surface);
  border: 1px solid var(--lp-line);
  border-radius: 14px;
}
.feature-card h3 {
  font-family: var(--lp-serif);
  font-size: 1.05rem; font-weight: 700; margin-bottom: .45rem;
}
.feature-card p {
  font-size: .88rem; color: var(--lp-ink-3); line-height: 1.7;
}

#news { background: rgba(255, 255, 255, .45); }
.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}
.news-card {
  background: var(--lp-surface);
  border: 1px solid var(--lp-line);
  border-radius: 14px;
  padding: 1.25rem 1.3rem 1.3rem;
  border-left: 3px solid var(--lp-accent);
}
.news-card.level-warn { border-left-color: #b7791f; }
.news-card.level-maintenance { border-left-color: #5b6b7c; }
.news-meta {
  display: flex; align-items: center; gap: .55rem;
  margin-bottom: .55rem;
}
.news-meta time {
  font-size: .75rem; font-weight: 600; color: var(--lp-ink-4);
  font-variant-numeric: tabular-nums;
}
.news-badge {
  font-size: .65rem; font-weight: 800; letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--lp-accent);
  background: rgba(15, 110, 106, .1);
  padding: .18rem .45rem; border-radius: 6px;
}
.news-badge.warn { color: #8a5a12; background: rgba(183, 121, 31, .12); }
.news-badge.maint { color: #445466; background: rgba(91, 107, 124, .12); }
.news-card h3 {
  font-family: var(--lp-serif);
  font-size: 1.05rem; font-weight: 700; line-height: 1.4;
  margin-bottom: .4rem;
}
.news-card p {
  font-size: .88rem; color: var(--lp-ink-3); line-height: 1.7;
  white-space: pre-wrap;
}
.news-empty {
  font-size: .95rem; color: var(--lp-ink-4);
  padding: 1.5rem 0;
}

#cta {
  padding-top: clamp(2.5rem, 5vw, 3.5rem);
  padding-bottom: clamp(3.5rem, 7vw, 5rem);
}
.cta-inner {
  max-width: 720px; margin: 0 auto; text-align: center;
  background: var(--lp-ink); color: #fff;
  border-radius: 20px;
  padding: clamp(2rem, 4vw, 2.75rem) clamp(1.5rem, 4vw, 2.5rem);
}
.cta-kicker {
  font-size: .7rem; font-weight: 800; letter-spacing: .14em;
  text-transform: uppercase; color: #9fe0d8; margin-bottom: .75rem;
}
.cta-inner h2 {
  font-family: var(--lp-serif);
  font-size: clamp(1.4rem, 2.8vw, 1.85rem);
  font-weight: 700; line-height: 1.35; margin-bottom: .65rem;
}
.cta-inner > p {
  font-size: .95rem; color: rgba(255,255,255,.72); margin-bottom: 1.4rem;
}
.cta-actions { display: flex; flex-wrap: wrap; gap: .65rem; justify-content: center; }
.btn-cta-primary, .btn-cta-ghost {
  font-size: .9rem; font-weight: 700; padding: .8rem 1.35rem;
  border-radius: 10px; cursor: pointer; transition: .15s ease;
}
.btn-cta-primary {
  background: #fff; color: var(--lp-ink); border: none;
}
.btn-cta-primary:hover { transform: translateY(-1px); }
.btn-cta-ghost {
  background: transparent; color: #fff;
  border: 1px solid rgba(255,255,255,.28);
}
.btn-cta-ghost:hover { background: rgba(255, 255, 255, .1); }

footer {
  background: var(--lp-paper); border-top: 1px solid var(--lp-line);
  padding: 2rem clamp(1.25rem, 4vw, 2.75rem);
}
.footer-inner {
  max-width: 1100px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  gap: 1.25rem; flex-wrap: wrap;
}
.footer-brand {
  display: flex; align-items: center; gap: .5rem; text-decoration: none;
  font-family: var(--lp-serif); font-weight: 700;
}
.footer-links { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.footer-links a {
  font-size: .8rem; color: var(--lp-ink-3); text-decoration: none;
}
.footer-links a:hover { color: var(--lp-ink); }
.footer-copy { font-size: .75rem; color: var(--lp-ink-4); }

.fade-up {
  opacity: 0; transform: translateY(18px);
  transition: opacity .65s var(--lp-ease), transform .65s var(--lp-ease);
}
.fade-up.visible { opacity: 1; transform: none; }
.fade-up-d1 { transition-delay: .08s; }
.fade-up-d2 { transition-delay: .16s; }

@media (max-width: 1024px) {
  .hero-panel { display: none; }
  .hero-inner { grid-template-columns: 1fr; max-width: 560px; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .hero { min-height: auto; padding-top: 6.5rem; padding-bottom: 3.5rem; }
  .feature-grid, .news-grid { grid-template-columns: 1fr; }
}