/* ===== TSUBONE Com∪nity - shared style.css ===== */

/* --- Theme tokens (easy to tweak) --- */
:root {
  --bg: #0d1117;
  --panel: #0f141a;
  --panel-2: #0b1016;
  --text: #e6edf3;
  --muted: #9aa4af;
  --line: #3a4552;
  --brand: #7362ff;
  --btn-dark: #1a2129;
  --shadow: 0 10px 30px rgba(0,0,0,.45);
  --glow: 0 10px 30px rgba(115,98,255,.18);
}

* { box-sizing: border-box }
html, body { height: 100% }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Hiragino Sans",
               "Helvetica Neue", Arial, "Segoe UI", "Noto Sans JP", sans-serif;
  background: radial-gradient(1200px 600px at 15% -10%, #0e1720 0%, #0d1117 40%, #0b0f14 100%);
  color: var(--text);
  line-height: 1.75;
}

/* --- Layout shells --- */
.container {
  max-width: 1100px;
  margin: 48px auto;
  padding: 0 22px;
}
.hero {
  background: linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,.00));
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 32px 28px 28px;
  box-shadow: var(--shadow);
}
.section {
  margin-top: 26px;
  background: linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,.00));
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px;
  box-shadow: var(--shadow);
}

/* --- Title block --- */
.kicker {
  width: 48px;
  height: 58px;
  display: inline-block;
  margin-right: 12px;
  border-radius: 12px;
  background: url("/assets/logo-unity.svg") center/contain no-repeat;
  flex-shrink: 0;
}
.title-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}
h1 {
  margin: 0;
  font-size: clamp(28px, 3.2vw, 40px);
  letter-spacing: .2px;
  font-weight: 800;
}
.brand-emerald {
  color: var(--brand);
  font-weight: bold;
  text-decoration: underline;
  text-decoration-thickness: .18em;
  text-underline-offset: .12em;
}

/* --- Taglines --- */
.lead {
  margin: 6px 0 2px;
  font-size: 18px;
}
.sub {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

/* --- Divider --- */
.hr {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, transparent, var(--line), transparent);
  margin: 22px 0 0;
}

/* --- Footer --- */
.footer {
  background: linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,.00));
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 20px 22px;
  margin-top: 22px;
  box-shadow: var(--shadow);
  color: var(--muted);
  font-size: 14px;
}
.footer a {
  color: inherit;
  text-decoration: underline;
}
.footer a:hover {
  color: var(--text);
  text-decoration: underline;
}

/* --- Button grid: 2段組（new layout） --- */
.nav-grid {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 18px;
}
.nav-grid .row {
  display: flex;
  justify-content: space-between;
}
.nav-grid .top {
  justify-content: center;
}
.nav-grid .bottom {
  justify-content: space-between;
}

/* --- Buttons --- */
.btn {
  --pad-y: .66em;
  --pad-x: 1.2em;
  border-radius: 12px;
  padding: var(--pad-y) var(--pad-x);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--btn-dark), #141a21);
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: .2px;
  display: inline-flex;
  align-items: center;
  gap: .55em;
  box-shadow: var(--shadow);
  transition: transform .08s ease, box-shadow .12s ease, border-color .12s ease, background .12s ease;
}
.btn:hover {
  transform: translateY(-1px);
  border-color: #4b5763;
  box-shadow: var(--shadow), 0 0 0 1px rgba(255,255,255,.02) inset;
}
.btn:active {
  transform: translateY(0);
}
.btn--primary {
  color: #0b1a12;
  background: linear-gradient(180deg, rgba(115,98,255,.92), rgba(115,98,255,.82));
  border: 1px solid rgba(115,98,255,.9);
  box-shadow: var(--glow), var(--shadow);
}
.btn--primary:hover {
  background: linear-gradient(180deg, rgba(115,98,255,.95), rgba(115,98,255,.85));
  border-color: rgba(115,98,255,.95);
}
.btn[aria-current="page"] {
  pointer-events: none;
  color: #7a8793;
  border-color: #1f2730;
  background: linear-gradient(180deg, #151b22, #131920);
  box-shadow: none;
}

/* --- Arrows --- */
.btn[data-dir="left"]::before,
.btn[data-dir="up"]::before,
.btn[data-dir="right"]::after {
  font-weight: 700;
  line-height: 1;
  opacity: .95;
}
.btn[data-dir="left"]::before { content: "←"; margin-right: .35em; }
.btn[data-dir="up"]::before   { content: "↑"; margin-right: .35em; }
.btn[data-dir="right"]::after { content: "→"; margin-left: .35em; }

/* --- Small label --- */
.badge {
  font-size: .72em;
  padding: .2em .5em;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #0e151c;
  color: var(--muted);
  font-weight: 600;
}

/* --- Cards grid (Unity page) --- */
.grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  margin-top: 18px;
}
.card {
  background: linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,.00));
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px 18px;
  box-shadow: var(--shadow);
}
.card h3 {
  margin: .2em 0 .2em;
  color: var(--text);
  font-size: 18px;
}
.card p {
  margin: .2em 0 0;
  color: var(--muted);
  font-size: 14px;
}

/* --- Canvas (network art) --- */
.canvas-wrap {
  height: 360px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: radial-gradient(900px 380px at 25% -20%, rgba(115,98,255,.08), rgba(115,98,255,.02) 40%, transparent 70%), #0d1117;
  overflow: hidden;
  box-shadow: var(--shadow);
  margin-top: 16px;
}
canvas {
  display: block;
  margin: 0 auto 24px auto;
  border-radius: 12px;
  background: var(--panel);
  max-width: 720px;
  width: 100%;
  height: auto;
}

/* --- Helpers --- */
.mt-2 { margin-top: 12px }
.mt-3 { margin-top: 18px }
.mt-4 { margin-top: 24px }

/* --- Responsive tweaks --- */
@media (max-width:600px) {
  .container { margin: 32px auto }
  .hero { padding: 24px 18px }
}