/* ============================================================
   styles.css — rei-tools.app coming-soon (shippable, responsive).
   Direction G: centered hero + signature LLM ⇄ Rei ⇄ Unreal bridge.
   Builds on tokens.css.
   ============================================================ */

html { -webkit-text-size-adjust: 100%; }
body {
  min-height: 100svh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  overflow-x: hidden;
  position: relative;
}
.mono, .eyebrow, .node-s, .foot { font-family: var(--mono); }

/* ---------- background ---------- */
.bg { position: fixed; inset: 0; z-index: -1; overflow: hidden; background: var(--bg-0); }
.bg-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(oklch(1 0 0 / 0.018) 1px, transparent 1px),
    linear-gradient(90deg, oklch(1 0 0 / 0.018) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 65% 60% at 50% 38%, #000 30%, transparent 80%);
          mask-image: radial-gradient(ellipse 65% 60% at 50% 38%, #000 30%, transparent 80%);
  opacity: 0.6;
}
.bg-glow { position: absolute; border-radius: 50%; filter: blur(90px); will-change: transform, opacity; }
.bg-glow-1 {
  width: min(740px, 90vw); aspect-ratio: 1; top: -16%; left: 50%; transform: translateX(-50%);
  background: radial-gradient(circle, oklch(0.685 0.165 295 / 0.46), transparent 66%);
  animation: drift 14s ease-in-out infinite;
}
.bg-glow-2 {
  width: min(560px, 80vw); aspect-ratio: 1; bottom: -22%; left: 18%;
  background: radial-gradient(circle, oklch(0.72 0.13 240 / 0.22), transparent 68%);
  animation: drift 18s ease-in-out infinite reverse;
}
@keyframes drift {
  0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.62; }
  50%      { transform: translate(2%, -3%) scale(1.08); opacity: 0.9; }
}
.bg-glow-1 { transform: translateX(-50%); }

/* ---------- brand mark ---------- */
.mark {
  display: grid; place-items: center; flex: 0 0 auto;
  width: 30px; height: 30px; border-radius: 8px;
  font-size: 30px; /* glyph below scales off this, not the body text */
  background: linear-gradient(150deg, #B394FF, #8F6DDE);
  box-shadow: 0 8px 28px oklch(0.685 0.165 295 / 0.34),
              inset 0 1px 0 rgba(255, 255, 255, 0.28),
              inset 0 0 0 1px rgba(255, 255, 255, 0.10);
  position: relative; overflow: hidden;
}
.mark::after {
  content: ""; position: absolute; inset: 0 0 50% 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.22), transparent);
}
.mark-glyph {
  font-family: 'Hiragino Sans', 'Yu Gothic', 'Noto Sans CJK JP', 'Noto Sans JP', 'PingFang SC', system-ui, sans-serif;
  font-weight: 800; color: #fff; line-height: 1; font-size: 0.62em;
}
.mark-lg {
  width: clamp(78px, 11vw, 104px); height: clamp(78px, 11vw, 104px);
  font-size: clamp(78px, 11vw, 104px);
  border-radius: clamp(18px, 2.6vw, 24px);
  animation: float 6s ease-in-out infinite;
}
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-7px); } }

/* ---------- topbar ---------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: clamp(20px, 3vw, 36px) clamp(20px, 5vw, 64px);
}
.brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; }
.brand-wm { font-size: 19px; font-weight: 700; color: var(--tx-hi); letter-spacing: -0.02em; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 11.5px; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--accent-hi);
}
.eyebrow-dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-ghost); animation: pulse-dot 2.4s ease-in-out infinite;
}

/* ---------- hero ---------- */
.hero {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; gap: clamp(20px, 3vw, 28px);
  padding: clamp(24px, 4vw, 48px) clamp(20px, 5vw, 64px) clamp(40px, 6vw, 72px);
}
.hero-h1 {
  font-size: clamp(38px, 6.4vw, 62px); font-weight: 800; line-height: 1.04;
  letter-spacing: -0.035em; color: var(--tx-hi); margin: 4px 0 0; text-wrap: balance;
}
.hero-h1 .dim { color: var(--tx-low); }
.hero-sub {
  font-size: clamp(16px, 2.1vw, 18px); line-height: 1.6; color: var(--tx-mid);
  max-width: 600px; margin: 0; text-wrap: pretty;
}

/* ---------- waitlist ---------- */
.wl { width: 100%; max-width: 480px; margin: clamp(4px, 1vw, 8px) auto 0; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.wl-field {
  display: flex; align-items: center; gap: 6px; padding: 6px;
  background: var(--bg-2); border: 1px solid var(--line); border-radius: 999px;
  box-shadow: var(--shadow-1);
  transition: border-color var(--speed) var(--ease), box-shadow var(--speed) var(--ease);
}
.wl-field:focus-within { border-color: var(--accent-dim); box-shadow: 0 0 0 4px var(--accent-ghost2); }
.wl-input {
  flex: 1; min-width: 0; background: transparent; border: none; outline: none;
  color: var(--tx-hi); font-family: var(--mono); font-size: 14px; padding: 0 10px 0 16px;
}
.wl-input::placeholder { color: var(--tx-faint); }
.wl-btn {
  flex: 0 0 auto; border: none; border-radius: 999px;
  background: var(--accent); color: var(--on-accent);
  font-family: var(--sans); font-size: 13.5px; font-weight: 650; letter-spacing: -0.01em;
  padding: 11px 20px; cursor: pointer; white-space: nowrap;
  transition: background var(--speed) var(--ease), transform var(--speed) var(--ease);
}
.wl-btn:hover { background: var(--accent-hi); }
.wl-btn:active { background: var(--accent-press); transform: translateY(1px); }
.wl-btn:disabled { opacity: 0.6; cursor: default; }

.wl-msg { font-size: 13px; line-height: 1.5; margin: 12px 0 0; min-height: 1.2em; color: var(--tx-mid); }
.wl-msg.ok { color: var(--ok); }
.wl-msg.err { color: var(--err); }

/* success: collapse the field, show a confirmation row */
.wl.is-done .wl-field { display: none; }
.wl.is-done .wl-msg { font-size: 15px; }

.wl.shake .wl-field { animation: shake 0.4s var(--ease); }
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-5px); }
  40%, 80% { transform: translateX(5px); }
}

/* ---------- signature bridge ---------- */
.bridge {
  display: flex; align-items: center; justify-content: center;
  margin-top: clamp(10px, 2vw, 18px); flex-wrap: nowrap;
}
.node {
  display: flex; flex-direction: column; align-items: center; gap: 7px;
  padding: 16px 22px; min-width: 138px;
  background: oklch(0.22 0.007 270 / 0.55);
  border: 1px solid var(--line-soft); border-radius: var(--radius);
}
.node-acc {
  border-color: color-mix(in oklch, var(--accent) 34%, var(--line));
  background: linear-gradient(180deg, var(--bg-3), var(--bg-2));
  box-shadow: 0 0 36px oklch(0.685 0.165 295 / 0.16);
}
.node-i {
  width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center;
  font-family: var(--mono); font-weight: 700; font-size: 14px;
}
.node-i[data-kind="llm"] { background: var(--accent-ghost); color: var(--accent-hi); }
.node-i[data-kind="ue"]  { background: var(--info-dim); color: var(--info); }
.node-i[data-kind="rei"] {
  background: linear-gradient(150deg, #B394FF, #8F6DDE); color: #fff; font-size: 24px;
  font-family: 'Hiragino Sans', 'Noto Sans CJK JP', 'Noto Sans JP', system-ui, sans-serif;
  box-shadow: 0 6px 18px oklch(0.685 0.165 295 / 0.4);
}
.node-t { font-size: 14.5px; font-weight: 650; color: var(--tx-hi); }
.node-s { font-size: 11px; color: var(--tx-low); }
.wire {
  width: clamp(40px, 5vw, 64px); height: 2px; background: var(--line-strong);
  border-radius: 2px; position: relative; overflow: hidden; flex: 0 0 auto;
}
.pulse {
  position: absolute; top: -1px; width: 18px; height: 4px; border-radius: 4px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  animation: pulse-h 2.1s linear infinite;
}
.pulse-2 { animation-delay: 1.05s; }
@keyframes pulse-h { 0% { transform: translateX(-22px); } 100% { transform: translateX(72px); } }

/* ---------- footer ---------- */
.foot {
  display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 10px;
  padding: 0 24px clamp(24px, 3vw, 34px); font-size: 11.5px; color: var(--tx-faint);
}
.foot-dot { opacity: 0.5; }

/* ============================================================
   responsive
   ============================================================ */
@media (max-width: 760px) {
  .eyebrow { display: none; }
  .wl-field { flex-wrap: wrap; border-radius: var(--radius-lg); padding: 8px; }
  .wl-input { width: 100%; flex-basis: 100%; padding: 8px 12px; height: 40px; font-size: 16px; }
  .wl-btn { width: 100%; border-radius: var(--radius); padding: 13px 20px; }

  /* bridge stacks vertically */
  .bridge { flex-direction: column; gap: 0; }
  .node { width: min(260px, 80vw); flex-direction: row; justify-content: flex-start; gap: 14px; text-align: left; min-width: 0; }
  .node-i { width: 36px; height: 36px; }
  .wire { width: 2px; height: 26px; }
  .pulse { top: auto; left: -1px; width: 4px; height: 14px;
    background: linear-gradient(180deg, transparent, var(--accent), transparent);
    animation: pulse-v 2.1s linear infinite; }
  @keyframes pulse-v { 0% { transform: translateY(-18px); } 100% { transform: translateY(34px); } }
}

@media (prefers-reduced-motion: reduce) {
  .mark-lg, .bg-glow, .pulse, .eyebrow-dot { animation: none !important; }
}