/* ============================================================
   GTM ENGINEER LOG — top page
   HUD motif, quieted down: fewer layers, wider air, longer measure
   ============================================================ */

:root {
  --bg:        #050810;
  --surface:   #080d18;
  --surface-2: #0b1322;
  --line:      rgba(120, 170, 205, 0.16);
  --line-hot:  rgba(0, 229, 255, 0.34);

  --cyan:      #35e7ff;
  --cyan-soft: rgba(0, 229, 255, 0.14);
  --gold:      #f0c53a;
  --gold-soft: rgba(232, 185, 35, 0.14);

  --text:      #e4eefa;
  --text-2:    #a9c0d4;
  --text-3:    #7690a8;

  --hud:  "Orbitron", sans-serif;
  --mono: "Share Tech Mono", ui-monospace, monospace;
  --body: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;

  --shell: 1080px;
  --gutter: clamp(1.25rem, 5vw, 3rem);
  --sect: clamp(4rem, 9vw, 7.5rem);
  --radius: 2px;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--body);
  font-size: 16px;
  line-height: 2;
  font-feature-settings: "palt" 1;
  letter-spacing: 0.02em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--cyan); text-decoration: none; }
a:hover { color: #9ff4ff; }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

strong { font-weight: 700; color: #fff; }

.shell {
  width: min(var(--shell), 100%);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 20;
  padding: 0.6rem 1rem;
  background: var(--cyan);
  color: #04121a;
  font-family: var(--mono);
}
.skip-link:focus { left: 0; }

/* ── ambient field ─────────────────────────────────────── */

.field {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}

#bg-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.78;
}

.field-grid {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(0, 229, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 0.05) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 70% 55% at 50% 12%, #000 0%, transparent 72%);
}

.field-vignette {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 55% at 50% 45%, rgba(5, 8, 16, 0.74) 0%, rgba(5, 8, 16, 0.4) 55%, rgba(5, 8, 16, 0) 80%),
    radial-gradient(ellipse 60% 45% at 15% -5%, rgba(0, 229, 255, 0.10), transparent 60%),
    radial-gradient(ellipse 50% 40% at 95% 105%, rgba(232, 185, 35, 0.05), transparent 60%);
}

/* ── topbar ────────────────────────────────────────────── */

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(5, 8, 16, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  width: min(var(--shell), 100%);
  margin-inline: auto;
  padding: 0.7rem var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
}

.topbar-id {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--text-2);
  white-space: nowrap;
}

.topbar-id .sep { color: var(--text-3); }

.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px rgba(0, 229, 255, 0.8);
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.topbar-meta {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 3vw, 1.5rem);
}

.topbar-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 32px;
  padding: 0 0.7rem;
  color: var(--gold);
  border: 1px solid var(--gold-soft);
  background: rgba(232, 185, 35, 0.06);
  transition: background 0.2s, border-color 0.2s;
}

.topbar-link:hover {
  color: var(--gold);
  border-color: rgba(232, 185, 35, 0.5);
  background: rgba(232, 185, 35, 0.13);
}

.topbar-clock {
  display: flex;
  gap: 0.7rem;
  color: var(--text-3);
}

.topbar-clock time { color: var(--text-2); }

/* ── hero ──────────────────────────────────────────────── */

.hero {
  padding: clamp(3rem, 9vw, 6rem) 0 clamp(2.5rem, 6vw, 4rem);
}

.hero-inner {
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
}

.eyebrow {
  margin: 0 0 1.25rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.24em;
  line-height: 1.6;
  color: var(--gold);
}

.hero-title {
  margin: 0 0 1.5rem;
  line-height: 1.1;
}

.title-en {
  display: block;
  font-family: var(--hud);
  font-weight: 900;
  font-size: clamp(3.4rem, 13vw, 6rem);
  letter-spacing: 0.02em;
  color: #eafcff;
  text-shadow: 0 0 32px rgba(0, 229, 255, 0.45);
}

.title-en.is-glitch { animation: glitch 0.26s steps(2) 1; }

@keyframes glitch {
  0%   { transform: translate(0); }
  30%  { transform: translate(-2px, 1px); text-shadow: -2px 0 #ff3344, 2px 0 var(--cyan); }
  60%  { transform: translate(2px, -1px); }
  100% { transform: translate(0); }
}

.title-jp {
  display: block;
  margin-top: 0.5rem;
  font-size: clamp(1.15rem, 4.4vw, 1.7rem);
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: 0.08em;
  color: var(--text);
}

.hero-lead {
  margin: 0 0 2rem;
  max-width: 30em;
  color: var(--text-2);
  font-size: clamp(0.95rem, 2.6vw, 1.02rem);
  line-height: 2.1;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 1.4rem;
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  border: 1px solid var(--line-hot);
  transition: background 0.2s, border-color 0.2s, transform 0.2s;
}

.btn-primary {
  color: #04121a;
  background: var(--cyan);
  border-color: var(--cyan);
}
.btn-primary:hover {
  color: #04121a;
  background: #7defff;
  transform: translateY(-1px);
}

.btn-ghost {
  color: var(--text);
  background: rgba(0, 229, 255, 0.04);
}
.btn-ghost:hover {
  color: #fff;
  border-color: var(--cyan);
  background: rgba(0, 229, 255, 0.12);
}

/* metrics */

.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin: clamp(2.5rem, 6vw, 4rem) 0 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.metric {
  padding: 1rem 1.1rem 1.1rem;
  background: var(--surface);
}

.metric dt {
  font-family: var(--mono);
  font-size: 0.63rem;
  letter-spacing: 0.16em;
  line-height: 1.5;
  color: var(--text-3);
}

.metric dd {
  margin: 0.35rem 0 0;
  font-family: var(--hud);
  font-weight: 700;
  font-size: clamp(1.3rem, 4vw, 1.7rem);
  letter-spacing: 0.02em;
  line-height: 1.2;
  color: var(--cyan);
}

.metric .unit {
  font-size: 0.62em;
  color: var(--text-2);
}

/* ── module frame ──────────────────────────────────────── */

.module {
  padding: var(--sect) 0;
  border-top: 1px solid var(--line);
}

.module-head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.15rem 1.1rem;
  align-items: baseline;
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.module-id {
  grid-row: 1 / 3;
  padding-top: 0.35rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.module-head h2 {
  margin: 0;
  font-family: var(--hud);
  font-weight: 700;
  font-size: clamp(1.25rem, 4.5vw, 1.75rem);
  letter-spacing: 0.14em;
  line-height: 1.3;
  color: #eafcff;
}

.module-jp {
  grid-column: 2;
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--text-3);
}

.prose {
  max-width: 34em;
}

.module-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 340px);
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: start;
}

.side-note {
  padding: 1.35rem 1.4rem 1.5rem;
  background: rgba(8, 13, 24, 0.72);
  border: 1px solid var(--line);
  border-top: 1px solid var(--line-hot);
  backdrop-filter: blur(6px);
}

.side-key {
  margin: 0 0 0.6rem;
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.22em;
  color: var(--gold);
}

.side-note h3 {
  margin: 0 0 0.9rem;
  font-size: 0.98rem;
  font-weight: 700;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--text);
}

.side-neq {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 1rem;
  padding: 0.5rem 0.7rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--text-3);
  background: rgba(0, 229, 255, 0.05);
  border-left: 2px solid var(--line-hot);
}

.side-neq span { color: var(--cyan); }

.side-body {
  margin: 0 0 1rem;
  font-size: 0.86rem;
  line-height: 2;
  color: var(--text-2);
}

.side-body strong { color: var(--cyan); font-weight: 500; }

.side-list {
  margin: 0 0 1.1rem;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.4rem;
}

.side-list li {
  position: relative;
  padding-left: 1.1rem;
  font-size: 0.83rem;
  line-height: 1.9;
  color: var(--text-2);
}

.side-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.9em;
  width: 6px;
  height: 1px;
  background: var(--cyan);
}

.side-foot {
  margin: 0;
  padding-top: 0.9rem;
  border-top: 1px solid var(--line);
  font-size: 0.76rem;
  line-height: 1.9;
  color: var(--text-3);
}

.prose p {
  margin: 0 0 1.5rem;
  color: var(--text-2);
  line-height: 2.15;
}

.prose p:last-child { margin-bottom: 0; }
.prose strong { color: var(--cyan); font-weight: 500; }

.note {
  max-width: 40em;
  margin: 2rem 0 0;
  padding-left: 1rem;
  border-left: 1px solid var(--line-hot);
  font-size: 0.85rem;
  line-height: 2;
  color: var(--text-3);
}

/* ── M02 roles ─────────────────────────────────────────── */

.roles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.roles li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.1rem 0.9rem;
  padding: 1.15rem 1.25rem;
  background: var(--surface);
  transition: background 0.25s;
}

.roles li:hover { background: var(--surface-2); }

.role-id {
  grid-row: 1 / 3;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  line-height: 1.9;
  color: var(--gold);
}

.role-name {
  font-size: 0.98rem;
  font-weight: 500;
  line-height: 1.6;
  color: var(--text);
}

.role-scope {
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--text-3);
}

/* ── M03 experiments ───────────────────────────────────── */

.exp-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}

.exp {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 1.4rem 1.4rem 1.5rem;
  color: inherit;
  background: var(--surface);
  border: 1px solid var(--line);
  transition: border-color 0.25s, transform 0.25s, background 0.25s;
}

a.exp:hover {
  color: inherit;
  border-color: var(--line-hot);
  background: var(--surface-2);
  transform: translateY(-2px);
}

.exp-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.exp-code {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--text-3);
}

.exp-status {
  padding: 0.15rem 0.55rem;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  color: var(--text-3);
  border: 1px solid var(--line);
}

.exp-active .exp-status {
  color: var(--cyan);
  border-color: var(--line-hot);
  background: var(--cyan-soft);
}

.exp-open .exp-status {
  color: var(--gold);
  border-color: rgba(232, 185, 35, 0.4);
  background: var(--gold-soft);
}

.exp-dev .exp-status { color: var(--text-2); }
.exp-planned .exp-status { border-style: dashed; }

.exp-name {
  font-family: var(--hud);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.12em;
  line-height: 1.4;
  color: var(--text);
}

.exp-desc {
  font-size: 0.85rem;
  line-height: 1.95;
  color: var(--text-3);
}

.exp-cta {
  margin-top: auto;
  padding-top: 0.75rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.exp-open .exp-cta { color: var(--gold); }

.exp-planned {
  background: rgba(8, 13, 24, 0.5);
  border-style: dashed;
}
.exp-planned .exp-name { color: var(--text-2); }

/* ── M04 log list ──────────────────────────────────────── */

.loglist {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.loglist li {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.4rem 1.25rem;
  padding: 1.1rem 0.25rem;
  border-bottom: 1px solid var(--line);
}

.log-date {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.log-title {
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--text-2);
}

.log-badge {
  padding: 0.15rem 0.5rem;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  color: var(--text-3);
  border: 1px solid var(--line);
}

.log-badge.is-live {
  color: var(--cyan);
  border-color: var(--line-hot);
  background: var(--cyan-soft);
}

.log-badge.is-open {
  color: var(--gold);
  border-color: rgba(232, 185, 35, 0.4);
  background: var(--gold-soft);
}

/* ── M05 telemetry ─────────────────────────────────────── */

.tele {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem 3rem;
}

.tele-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem 1rem;
  align-items: baseline;
}

.tele-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  line-height: 1.5;
  color: var(--text-3);
}

.tele-val {
  font-family: var(--mono);
  font-size: 0.88rem;
  color: var(--cyan);
  text-align: right;
}

.tele-bar {
  grid-column: 1 / -1;
  display: block;
  height: 3px;
  background: rgba(120, 170, 205, 0.14);
}

.tele-bar > span {
  display: block;
  height: 100%;
  background: var(--cyan);
  box-shadow: 0 0 10px rgba(0, 229, 255, 0.5);
}

.tele-bar.is-gold > span {
  background: var(--gold);
  box-shadow: 0 0 10px rgba(232, 185, 35, 0.45);
}

/* ── footer ────────────────────────────────────────────── */

.site-footer {
  padding: clamp(2.5rem, 6vw, 4rem) 0 3rem;
  border-top: 1px solid var(--line);
  background: rgba(3, 6, 12, 0.7);
}

.footer-inner {
  display: grid;
  gap: 1rem;
  text-align: center;
}

.footer-brand {
  margin: 0;
  font-family: var(--hud);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  color: var(--text-3);
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 1.75rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
}

.footer-nav a {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
}

.footer-note {
  margin: 0;
  font-size: 0.74rem;
  line-height: 1.9;
  color: var(--text-3);
}

/* ── reveal ────────────────────────────────────────────── */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ── responsive ────────────────────────────────────────── */

@media (max-width: 900px) {
  .module-split { grid-template-columns: 1fr; }
  .tele { gap: 1.5rem 2rem; }
}

@media (max-width: 640px) {
  body { font-size: 15.5px; }

  .metrics { grid-template-columns: repeat(2, 1fr); }
  .roles { grid-template-columns: 1fr; }
  .tele { grid-template-columns: 1fr; }

  .module-head {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }
  .module-id { grid-row: auto; padding-top: 0; }
  .module-jp { grid-column: 1; }

  .loglist li {
    grid-template-columns: auto 1fr;
  }
  .log-title { grid-column: 1 / -1; }

  .hero-actions .btn { flex: 1 1 12rem; }
  .topbar-clock #hud-date { display: none; }
}

@media (max-width: 380px) {
  .topbar-inner { font-size: 0.66rem; letter-spacing: 0.1em; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  #bg-canvas { opacity: 0.35; }
}