/* ===========================================
   G-Lab Community Site — base style
   =========================================== */

:root {
  --bg: #faf8f3;
  --bg-2: #f3efe5;
  --ink: #1a1a1a;
  --ink-2: #4a4a4a;
  --rule: #d9d3c4;
  /* Google brand colors */
  --teal: #34A853;   /* Google Green */
  --coral: #EA4335;  /* Google Red */
  --gold: #FBBC04;   /* Google Yellow */
  --blue: #4285F4;   /* Google Blue */
  --green: #34A853;

  --serif: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --sans: "Inter", "Noto Sans JP", "Hiragino Sans", "Yu Gothic UI", sans-serif;
  --mono: "JetBrains Mono", "Consolas", monospace;

  --maxw: 1180px;
  --gap: 24px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ===== Magnetic ===== */
.magnetic {
  transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: transform;
}

/* ===== Arrow micro-interaction ===== */
.arrow {
  display: inline-block;
  transition: transform 0.32s cubic-bezier(0.22, 1, 0.36, 1);
}
a:hover .arrow,
.cta-btn:hover .arrow {
  transform: translate(3px, -3px);
}
.cta-btn:hover .arrow {
  transform: translate(4px, 0);
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--teal); }

img { max-width: 100%; display: block; }

hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 64px 0;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 248, 243, 0.92);
  border-bottom: 1px solid var(--rule);
}
.site-header__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap);
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.02em;
}
.brand__mark {
  width: 28px; height: 28px;
}
.brand__sub {
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 500;
  color: var(--ink-2);
  letter-spacing: 0.18em;
  margin-left: 4px;
  text-transform: uppercase;
}

.nav {
  display: flex;
  gap: 28px;
  font-size: 13px;
  letter-spacing: 0.04em;
}
.nav a {
  position: relative;
  padding: 4px 0;
  color: var(--ink-2);
}
.nav a.is-active,
.nav a:hover {
  color: var(--ink);
}
.nav a.is-active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  border-bottom: 1px solid var(--ink);
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.06em;
  background: var(--ink);
  color: var(--bg);
  transition: transform .2s ease, background .2s ease;
}
.cta-btn:hover {
  background: var(--teal);
  border-color: var(--teal);
  color: #fff;
  transform: translateY(-1px);
}
.cta-btn--ghost {
  background: transparent;
  color: var(--ink);
}
.cta-btn--ghost:hover {
  background: var(--ink);
  color: var(--bg);
}

/* ---------- Layout ---------- */
.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 96px 28px;
}
.section--tight { padding: 56px 28px; }

.section__label {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--ink-2);
  border-top: 1px solid var(--ink);
  padding-top: 6px;
  margin-bottom: 28px;
  text-transform: uppercase;
}
.section__label--teal { border-top-color: var(--teal); }
.section__label--coral { border-top-color: var(--coral); }
.section__label--gold { border-top-color: var(--gold); }
.section__label--blue { border-top-color: var(--blue); }
.section__title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.25;
  margin: 0 0 24px;
  letter-spacing: -0.01em;
}
.section__lead {
  font-size: 16px;
  color: var(--ink-2);
  max-width: 720px;
  margin: 0;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 32px 28px 80px;
  border-bottom: 1px solid var(--rule);
  overflow: hidden;
}
.hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  mask-image: radial-gradient(ellipse 55% 80% at 78% 50%, #000 0%, #000 50%, transparent 95%);
  -webkit-mask-image: radial-gradient(ellipse 55% 80% at 78% 50%, #000 0%, #000 50%, transparent 95%);
}
.hero__inner { position: relative; z-index: 2; }
.hero__num { z-index: 3; }
/* ===== Typography reveal ===== */
.reveal-chars .char {
  display: inline-block;
  opacity: 0;
  transform: translateY(0.5em) rotateX(-30deg);
  transform-origin: 50% 100%;
  transition:
    opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: calc(var(--i) * 22ms);
}
.reveal-chars.is-revealed .char {
  opacity: 1;
  transform: translateY(0) rotateX(0);
}

/* ===== Block reveal (scroll-triggered) ===== */
.reveal-block {
  opacity: 0;
  transform: translateY(36px);
  transition:
    opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: calc(var(--stagger, 0) * 80ms);
}
.reveal-block.is-revealed {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal-chars .char,
  .reveal-block {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ===== Marquee (流れる横帯) ===== */
.marquee {
  overflow: hidden;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  background: var(--bg);
  padding: 22px 0;
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(20px, 2.4vw, 32px);
  letter-spacing: 0.04em;
  white-space: nowrap;
  user-select: none;
}
.marquee__inner {
  display: inline-flex;
  gap: 56px;
  animation: marquee-scroll 50s linear infinite;
  will-change: transform;
}
.marquee__item {
  display: inline-flex;
  align-items: center;
  gap: 56px;
}
.marquee__item::after {
  content: "✺";
  font-size: 0.6em;
  color: var(--teal);
}
.marquee__item--accent {
  font-style: italic;
}
.marquee__item--teal { color: var(--teal); }
.marquee__item--coral { color: var(--coral); }
.marquee__item--gold { color: var(--gold); }
.marquee__item--blue { color: var(--blue); }
@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
@media (prefers-reduced-motion: reduce) {
  .marquee__inner { animation: none; }
}

/* ===== Wordmark (巨大ロゴ outline) ===== */
.wordmark {
  font-family: var(--serif);
  font-size: clamp(80px, 18vw, 280px);
  font-weight: 700;
  text-align: center;
  line-height: 0.85;
  letter-spacing: -0.04em;
  color: transparent;
  -webkit-text-stroke: 1px var(--ink);
  text-stroke: 1px var(--ink);
  margin: 80px auto 0;
  padding: 32px 28px;
  border-top: 4px solid;
  border-image: linear-gradient(to right, var(--blue) 0%, var(--blue) 25%, var(--coral) 25%, var(--coral) 50%, var(--gold) 50%, var(--gold) 75%, var(--teal) 75%, var(--teal) 100%) 1;
  border-bottom: 1px solid var(--rule);
  user-select: none;
}
.wordmark__sub {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--ink-2);
  -webkit-text-stroke: 0;
  text-stroke: 0;
  margin-top: 12px;
  font-weight: 400;
  text-transform: uppercase;
}

/* ===== Member avatar hover scale ===== */
.member-card__avatar img {
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}
.member-card:hover .member-card__avatar img {
  transform: scale(1.04);
}

/* ===== KB card hover ===== */
.kb-card {
  transition:
    border-color 0.35s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}
.kb-card:hover {
  border-color: var(--ink);
  transform: translateY(-3px);
}

/* ===== Pillar hover ===== */
.pillar {
  transition: background 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}
.pillar:hover {
  background: rgba(255, 255, 255, 0.55);
}
.hero__inner { position: relative; z-index: 2; }
.hero__num { z-index: 3; }
.hero__inner {
  width: 100%;
  max-width: 760px;
  margin-left: 0;
  margin-right: auto;
}
.hero__eyebrow {
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--ink-2);
  margin-bottom: 24px;
  text-transform: uppercase;
}
.hero__title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(48px, 8.5vw, 124px);
  line-height: 0.98;
  letter-spacing: -0.03em;
  margin: 0 0 28px;
}
.hero__title em {
  font-style: italic;
  font-weight: 500;
  color: var(--teal);
}
.hero__lead {
  font-size: 17px;
  color: var(--ink-2);
  max-width: 540px;
  margin: 0 0 36px;
}
.hero__ctas {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.hero__meta {
  border-left: 1px solid var(--rule);
  padding-left: 32px;
  display: grid;
  gap: 18px;
  font-size: 13px;
  color: var(--ink-2);
}
.hero__meta dt {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ink);
  text-transform: uppercase;
  margin-bottom: 4px;
}
.hero__meta dd { margin: 0; }

.hero__num {
  position: absolute;
  right: 28px;
  top: 36px;
  font-family: var(--serif);
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--ink-2);
  z-index: 3;
}

/* ===== Hero side (右下のメタ) ===== */
.hero__side {
  position: absolute;
  right: 56px;
  bottom: 56px;
  z-index: 3;
  text-align: right;
  pointer-events: none;
}
.hero__bignum {
  font-family: var(--serif);
  font-size: clamp(96px, 12vw, 200px);
  line-height: 0.85;
  font-weight: 600;
  letter-spacing: -0.04em;
  color: transparent;
  -webkit-text-stroke: 1.2px var(--ink);
}
.hero__tags {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ink-2);
  text-transform: uppercase;
}
.hero__tags li {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
}
.hero__tags li::before {
  content: "—";
  color: var(--teal);
}

@media (max-width: 880px) {
  .hero__side { display: none; }
}

/* ---------- Pillars (3つの柱) ---------- */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}
.pillar {
  padding: 36px 28px 40px;
  border-right: 1px solid var(--rule);
}
.pillar:last-child { border-right: 0; }
.pillar__no {
  font-family: var(--serif);
  font-size: 32px;
  letter-spacing: 0.04em;
  font-weight: 600;
  margin-bottom: 18px;
  line-height: 1;
}
.pillar:nth-of-type(1) .pillar__no { color: var(--teal); }
.pillar:nth-of-type(2) .pillar__no { color: var(--coral); }
.pillar:nth-of-type(3) .pillar__no { color: var(--blue); }
.pillar__no small {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--ink-2);
  text-transform: uppercase;
  margin-left: 12px;
  font-weight: 400;
  vertical-align: middle;
}
.pillar__title {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 700;
  margin: 0 0 14px;
  line-height: 1.4;
}
.pillar__text {
  font-size: 14px;
  color: var(--ink-2);
  margin: 0;
}

/* ---------- Members ---------- */
.members {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.member-card {
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 0 0 32px;
  background: #fff;
  transition:
    border-color 0.35s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.45s cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 0.45s cubic-bezier(0.22, 1, 0.36, 1);
  display: flex;
  flex-direction: column;
  gap: 0;
  overflow: hidden;
}
.member-card:hover {
  border-color: var(--ink);
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(26, 26, 26, 0.06), 0 2px 4px rgba(26, 26, 26, 0.04);
}
.member-card__avatar {
  width: 100%;
  aspect-ratio: 1 / 1;
  background: #fff;
  border-bottom: 1px solid var(--rule);
  display: grid;
  place-items: center;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 96px;
  color: var(--ink);
  overflow: hidden;
  padding: 16px;
}
.member-card__avatar img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
}
.member-card > *:not(.member-card__avatar) {
  margin-left: 28px;
  margin-right: 28px;
}
.member-card > .member-card__role,
.member-card > div:nth-child(2) {
  margin-top: 24px;
}
.member-card__name { margin-top: 4px; }
.member-card__bio { margin-top: 12px; }
.member-card__links { margin-top: 16px; }
.member-card__name {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 700;
  margin: 0;
}
.member-card__role {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ink-2);
  text-transform: uppercase;
  position: relative;
  padding-left: 18px;
}
.member-card__role::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--ink);
}
.member-card:nth-of-type(1) .member-card__role::before { background: var(--teal); }
.member-card:nth-of-type(2) .member-card__role::before { background: var(--coral); }
.member-card:nth-of-type(3) .member-card__role::before { background: var(--blue); }
.member-card__bio {
  font-size: 14px;
  color: var(--ink-2);
  margin: 0;
  flex: 1;
}
.member-card__bio--pending {
  font-style: italic;
  opacity: 0.5;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  border-left: 2px solid var(--rule);
  padding-left: 12px;
}
.member-card__links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 13px;
}
.member-card__links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--ink);
  border-bottom: 1px solid var(--rule);
  padding-bottom: 2px;
}
.member-card__links a:hover {
  border-color: var(--teal);
  color: var(--teal);
}

/* ---------- Knowledge cards ---------- */
.kb-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.kb-card {
  border: 1px solid var(--rule);
  background: #fff;
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: border-color .2s ease;
}
.kb-card:hover { border-color: var(--ink); }
.kb-card__tag {
  display: inline-block;
  font-size: 10px;
  letter-spacing: 0.2em;
  padding: 4px 10px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  align-self: flex-start;
  text-transform: uppercase;
}
.kb-card__tag--prompt { color: var(--teal); border-color: var(--teal); }
.kb-card__tag--gas { color: var(--coral); border-color: var(--coral); }
.kb-card__tag--tips { color: var(--blue); border-color: var(--blue); }
.kb-card__tag--faq { color: var(--green); border-color: var(--green); }
.kb-card__title {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 700;
  margin: 0;
  line-height: 1.4;
}
.kb-card__excerpt {
  font-size: 14px;
  color: var(--ink-2);
  margin: 0;
  flex: 1;
}
.kb-card__meta {
  font-size: 12px;
  color: var(--ink-2);
  display: flex;
  justify-content: space-between;
  border-top: 1px solid var(--rule);
  padding-top: 12px;
}

/* ---------- Note feed ---------- */
.note-feed {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--rule);
}
.note-item {
  padding: 28px 24px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--bg);
  transition: background .2s ease;
}
.note-item:last-child { border-right: 0; }
.note-item:hover { background: #fff; }
.note-item__author {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ink-2);
  text-transform: uppercase;
}
.note-item__title {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 700;
  margin: 0;
  line-height: 1.5;
}
.note-item__date {
  font-size: 12px;
  color: var(--ink-2);
  margin-top: auto;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--ink);
  padding: 56px 28px 40px;
  margin-top: 80px;
}
.site-footer__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
}
.site-footer__brand {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 700;
}
.site-footer p, .site-footer ul {
  font-size: 13px;
  color: var(--ink-2);
  margin: 8px 0;
}
.site-footer ul { padding: 0; list-style: none; }
.site-footer ul li { padding: 4px 0; }
.site-footer__copy {
  max-width: var(--maxw);
  margin: 48px auto 0;
  padding-top: 20px;
  border-top: 1px solid var(--rule);
  font-size: 12px;
  color: var(--ink-2);
  display: flex;
  justify-content: space-between;
}

/* ---------- Responsive ---------- */
@media (max-width: 880px) {
  .hero__inner { grid-template-columns: 1fr; gap: 32px; }
  .hero__meta { border-left: 0; padding-left: 0; border-top: 1px solid var(--rule); padding-top: 24px; }
  .pillars { grid-template-columns: 1fr; }
  .pillar { border-right: 0; border-bottom: 1px solid var(--rule); }
  .pillar:last-child { border-bottom: 0; }
  .members { grid-template-columns: 1fr; }
  .kb-grid { grid-template-columns: 1fr; }
  .note-feed { grid-template-columns: 1fr; }
  .note-item { border-right: 0; }
  .site-footer__inner { grid-template-columns: 1fr; gap: 24px; }
  .nav { display: none; }
}