/* =========================================================
   株式会社フュージョンゲート — Landing Page
   Concept: "Computational Blueprint" — engineering precision
   meets Japanese editorial. Dark, restrained teal/blue duotone,
   mincho display headings, generative motion.
   ========================================================= */

:root {
  --bg:        #05070d;
  --bg-2:      #080b16;
  --surface:   #0c1120;
  --surface-2: #11182c;
  --line:        rgba(120, 170, 220, 0.12);
  --line-strong: rgba(120, 170, 220, 0.26);

  --text:     #eaf0fa;
  --text-dim: #9aa6c4;
  --text-mut: #5b6884;

  /* Fusion duotone — two lights */
  --teal: #34e3c0;
  --blue: #4d7cff;
  --grad-fusion: linear-gradient(115deg, var(--teal), var(--blue));

  --maxw: 1200px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);

  --font-jp:     "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", sans-serif;
  --font-serif:  "Shippori Mincho", "Hiragino Mincho ProN", serif;
  --font-latin:  "Bricolage Grotesque", var(--font-serif);
  --font-mono:   "DM Mono", ui-monospace, monospace;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-jp);
  background: var(--bg);
  color: var(--text);
  line-height: 1.85;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
h1, h2, h3 { line-height: 1.3; margin: 0; font-weight: 700; }
em { font-style: normal; color: var(--teal); }

/* ---------- Atmospheric background ---------- */
.bg-layer { position: fixed; inset: 0; pointer-events: none; z-index: 0; }
.bg-blueprint {
  background: url("../assets/bg-blueprint.svg") center top / cover no-repeat;
  -webkit-mask-image: radial-gradient(ellipse 95% 70% at 50% 0%, #000 0%, transparent 78%);
          mask-image: radial-gradient(ellipse 95% 70% at 50% 0%, #000 0%, transparent 78%);
  opacity: 0.6;
}
.bg-glow {
  background:
    radial-gradient(40rem 30rem at 16% -6%, rgba(52, 227, 192, 0.14), transparent 60%),
    radial-gradient(44rem 32rem at 90% 6%, rgba(77, 124, 255, 0.14), transparent 60%),
    radial-gradient(52rem 40rem at 50% 116%, rgba(77, 124, 255, 0.10), transparent 60%);
}
.bg-noise {
  opacity: 0.045;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- Layout helpers ---------- */
.section {
  position: relative;
  z-index: 1;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(5rem, 11vw, 9rem) clamp(1.25rem, 5vw, 3rem);
}
.section__head { margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.section__label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin: 0 0 1.1rem;
  display: flex;
  align-items: center;
  gap: 0.7rem;
}
.section__label > span {
  display: inline-grid;
  place-items: center;
  width: 2rem; height: 2rem;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  color: var(--teal);
  font-size: 0.7rem;
}
.section__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.7rem, 3.8vw, 2.7rem);
  letter-spacing: 0.015em;
  max-width: 24ch;
}
.section__title .tline { display: block; }
.strengths .section__title { max-width: none; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.95rem 1.7rem;
  border-radius: 6px;
  font-weight: 700;
  font-size: 0.96rem;
  letter-spacing: 0.04em;
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease), background 0.3s, border-color 0.3s;
  cursor: pointer;
  border: 1px solid transparent;
}
.btn > span { transition: transform 0.4s var(--ease); }
.btn:hover > span { transform: translateX(4px); }
.btn--primary {
  background: var(--grad-fusion);
  color: #04060d;
  box-shadow: 0 10px 36px -12px rgba(77, 124, 255, 0.7);
}
.btn--primary:hover { transform: translateY(-3px); box-shadow: 0 18px 48px -14px rgba(52, 227, 192, 0.75); }
.btn--ghost {
  background: rgba(255, 255, 255, 0.02);
  border-color: var(--line-strong);
  color: var(--text);
}
.btn--ghost:hover { border-color: var(--teal); transform: translateY(-3px); }
.btn--block { width: 100%; justify-content: center; margin-top: 0.5rem; }

/* ---------- Navigation ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem clamp(1.25rem, 5vw, 3rem);
  transition: background 0.4s, border-color 0.4s, padding 0.4s;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(5, 7, 13, 0.8);
  -webkit-backdrop-filter: blur(14px);
          backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
  padding-top: 0.8rem; padding-bottom: 0.8rem;
}
.nav__brand { display: flex; align-items: center; gap: 0.7rem; }
.nav__mark { position: relative; width: 26px; height: 26px; flex: none; }
.nav__mark span {
  position: absolute;
  top: 50%; width: 17px; height: 17px;
  border-radius: 50%;
  transform: translateY(-50%);
  mix-blend-mode: screen;
}
.nav__mark-a { left: 0;  background: var(--teal); }
.nav__mark-b { right: 0; background: var(--blue); }
.nav__name {
  font-family: var(--font-latin);
  font-weight: 800;
  letter-spacing: 0.08em;
  font-size: 1.02rem;
  display: flex; flex-direction: column; line-height: 1.1;
}
.nav__name-jp {
  font-family: var(--font-jp);
  font-weight: 500;
  font-size: 0.58rem;
  letter-spacing: 0.06em;
  color: var(--text-mut);
}
.nav__links { display: flex; align-items: center; gap: 1.9rem; }
.nav__links a {
  font-size: 0.92rem;
  color: var(--text-dim);
  position: relative;
  transition: color 0.3s;
}
.nav__links a:not(.nav__cta)::after {
  content: ""; position: absolute; left: 0; bottom: -6px;
  width: 0; height: 1px; background: var(--grad-fusion);
  transition: width 0.35s var(--ease);
}
.nav__links a:not(.nav__cta):hover { color: var(--text); }
.nav__links a:not(.nav__cta):hover::after,
.nav__links a.is-active::after { width: 100%; }
.nav__links a.is-active { color: var(--text); }
.nav__cta {
  padding: 0.5rem 1.1rem;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  color: var(--text) !important;
  transition: border-color 0.3s, background 0.3s;
}
.nav__cta:hover { border-color: var(--teal); background: rgba(52, 227, 192, 0.08); }

.nav__toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 6px;
}
.nav__toggle span {
  width: 24px; height: 2px; background: var(--text);
  transition: transform 0.35s var(--ease), opacity 0.25s;
}
.nav.is-open .nav__toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav.is-open .nav__toggle span:nth-child(2) { opacity: 0; }
.nav.is-open .nav__toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  z-index: 1;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 7rem clamp(1.25rem, 5vw, 3rem) 5rem;
}
.hero__canvas {
  position: absolute;
  top: 0; height: 100%;
  left: 50%; width: 100vw;
  transform: translateX(-50%);
  z-index: -2;
}
.hero__veil {
  position: absolute;
  top: 0; height: 100%;
  left: 50%; width: 100vw;
  transform: translateX(-50%);
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(60% 50% at 50% 38%, rgba(5, 7, 13, 0) 0%, rgba(5, 7, 13, 0.55) 100%),
    linear-gradient(180deg, rgba(5, 7, 13, 0.4) 0%, rgba(5, 7, 13, 0) 30%, rgba(5, 7, 13, 0.85) 100%);
}
.hero__inner { max-width: 52rem; }
.hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal);
  margin: 0 0 1.6rem;
  display: flex; align-items: center; gap: 0.6rem;
}
.hero__eyebrow .tick { font-size: 0.6rem; animation: blink 2.4s steps(1) infinite; }
@keyframes blink { 0%, 60% { opacity: 1; } 61%, 100% { opacity: 0.25; } }
.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(2.9rem, 8.5vw, 6rem);
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1.12;
  margin-bottom: 1.8rem;
}
.hero__title span { display: block; }
.hero__title-accent { color: var(--teal); }
.hero__lead {
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  color: var(--text-dim);
  margin: 0 0 2.6rem;
}
.eq {
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--text);
  padding: 0.08em 0.45em;
  border: 1px solid var(--line-strong);
  border-radius: 5px;
  white-space: nowrap;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-bottom: 3rem; }
.hero__tags { list-style: none; display: flex; flex-wrap: wrap; gap: 0.6rem 1.5rem; padding: 0; margin: 0; }
.hero__tags li {
  font-family: var(--font-mono);
  font-size: 0.82rem; color: var(--text-mut);
  position: relative; padding-left: 1.1rem;
}
.hero__tags li::before {
  content: ""; position: absolute; left: 0; top: 0.7em;
  width: 6px; height: 6px; border-radius: 50%; background: var(--grad-fusion);
}
.hero__scroll {
  position: absolute;
  bottom: 2rem; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.64rem; letter-spacing: 0.25em; color: var(--text-mut);
}
.hero__scroll span {
  width: 1px; height: 38px;
  background: linear-gradient(var(--teal), transparent);
  animation: scrollline 2.2s ease-in-out infinite;
  transform-origin: top;
}
@keyframes scrollline {
  0%, 100% { transform: scaleY(0.4); opacity: 0.4; }
  50%      { transform: scaleY(1);   opacity: 1; }
}

/* ---------- Philosophy ---------- */
.philosophy { text-align: center; }
.philosophy::before {
  content: "";
  position: absolute;
  inset: -2rem clamp(-3rem, -8vw, -6rem);
  z-index: -1;
  background: url("../assets/fusion-lines.svg") center / contain no-repeat;
  opacity: 0.5;
  -webkit-mask-image: radial-gradient(ellipse 60% 60% at 50% 45%, #000 0%, transparent 80%);
          mask-image: radial-gradient(ellipse 60% 60% at 50% 45%, #000 0%, transparent 80%);
  pointer-events: none;
}
.philosophy__equation {
  display: flex;
  justify-content: center;
  align-items: baseline;
  gap: clamp(0.5rem, 2vw, 1.4rem);
  font-family: var(--font-latin);
  font-weight: 800;
  font-size: clamp(3.5rem, 13vw, 9rem);
  line-height: 1;
  margin-bottom: 2.5rem;
}
.eqop { color: var(--text-mut); font-size: 0.7em; }
.eqop--gt { color: var(--teal); }
.eqitem--hl {
  background: var(--grad-fusion);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.philosophy__copy {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 4.5vw, 3rem);
  font-weight: 700;
  margin: 0 auto 1.8rem;
}
.philosophy__copy .pline { display: block; }
.philosophy__sub {
  max-width: none; margin: 0 auto;
  color: var(--text-dim);
  font-size: clamp(0.98rem, 1.6vw, 1.1rem);
}
.philosophy__sub .subline { display: block; }

/* ---------- Cards ---------- */
.cards { display: grid; gap: 1.2rem; position: relative; z-index: 1; }
.cards--3 { grid-template-columns: repeat(3, 1fr); }
.cards--4 { grid-template-columns: repeat(4, 1fr); }
.card {
  position: relative;
  background: linear-gradient(180deg, var(--surface), var(--bg-2));
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 2rem 1.6rem;
  overflow: hidden;
  transition: transform 0.45s var(--ease), border-color 0.45s, box-shadow 0.45s;
}
.card::before {
  content: "";
  position: absolute; inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: var(--grad-fusion);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
          mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.45s;
}
.card:hover { transform: translateY(-6px); box-shadow: 0 24px 60px -28px rgba(52, 227, 192, 0.4); }
.card:hover::before { opacity: 1; }
.card__index {
  font-family: var(--font-mono);
  font-size: 0.74rem; letter-spacing: 0.12em;
  color: var(--teal); margin: 0 0 1rem;
}
.card__icon {
  display: inline-grid; place-items: center;
  width: 3rem; height: 3rem; margin-bottom: 1.2rem;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  font-family: var(--font-mono);
  font-size: 1.2rem; color: var(--teal);
  background: rgba(52, 227, 192, 0.05);
}
.card__title { font-size: 1.2rem; margin-bottom: 0.8rem; }
.card__body { font-size: 0.93rem; color: var(--text-dim); margin: 0; }
.card__tag {
  margin: 1.3rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.74rem; font-weight: 500; letter-spacing: 0.03em;
  color: var(--text);
  display: inline-block;
  padding: 0.3rem 0.8rem;
  border-radius: 5px;
  background: rgba(77, 124, 255, 0.1);
  border: 1px solid var(--line);
}

/* ---------- Strengths: Venn Fusion ---------- */
.fusion-list { display: flex; flex-direction: column; }
.fusion-item {
  position: relative;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: center;
  padding: clamp(2.4rem, 5vw, 3.6rem) 0;
}
.fusion-item + .fusion-item { border-top: 1px solid var(--line); }

/* huge outline index, editorial accent */
.fusion-item__ghost {
  position: absolute;
  right: 0; top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-latin);
  font-weight: 800;
  font-size: clamp(6rem, 15vw, 12rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(120, 170, 220, 0.10);
  letter-spacing: -0.02em;
  pointer-events: none;
  z-index: 0;
  transition: -webkit-text-stroke-color 0.5s;
}
.fusion-item:hover .fusion-item__ghost { -webkit-text-stroke-color: rgba(52, 227, 192, 0.22); }

/* two overlapping lights = fusion */
.venn { position: relative; width: 200px; height: 140px; margin: 0 auto; z-index: 1; }
.venn span { position: absolute; top: 50%; border-radius: 50%; }
.venn__a, .venn__b {
  width: 108px; height: 108px;
  mix-blend-mode: screen;
  transition: transform 0.9s var(--ease);
}
.venn__a {
  left: 6px;
  border: 1px solid rgba(52, 227, 192, 0.6);
  background: radial-gradient(circle, rgba(52, 227, 192, 0.22), rgba(52, 227, 192, 0) 68%);
  box-shadow: 0 0 50px -10px rgba(52, 227, 192, 0.65), inset 0 0 30px -10px rgba(52, 227, 192, 0.5);
  transform: translate(-30px, -50%);
}
.venn__b {
  right: 6px;
  border: 1px solid rgba(77, 124, 255, 0.6);
  background: radial-gradient(circle, rgba(77, 124, 255, 0.22), rgba(77, 124, 255, 0) 68%);
  box-shadow: 0 0 50px -10px rgba(77, 124, 255, 0.65), inset 0 0 30px -10px rgba(77, 124, 255, 0.5);
  transform: translate(30px, -50%);
}
.venn__lens {
  left: 50%; width: 40px; height: 84px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0) 70%);
  filter: blur(3px);
  transform: translate(-50%, -50%) scale(0.4);
  opacity: 0;
  transition: opacity 0.9s var(--ease) 0.35s, transform 0.9s var(--ease) 0.35s;
}
/* fusion happens when the row scrolls into view */
.fusion-item.is-visible .venn__a { transform: translate(0, -50%); }
.fusion-item.is-visible .venn__b { transform: translate(0, -50%); }
.fusion-item.is-visible .venn__lens { opacity: 1; transform: translate(-50%, -50%) scale(1); animation: lensPulse 4.5s ease-in-out 1s infinite; }
@keyframes lensPulse {
  0%, 100% { opacity: 0.75; }
  50%      { opacity: 1; }
}
/* hover nudges the two lights closer + brightens fusion */
.fusion-item:hover .venn__a { transform: translate(9px, -50%); }
.fusion-item:hover .venn__b { transform: translate(-9px, -50%); }
.fusion-item:hover .venn__lens { opacity: 1; transform: translate(-50%, -50%) scale(1.12); }

.fusion-item__body { position: relative; z-index: 1; }
.fusion-item__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.76rem; letter-spacing: 0.16em;
  color: var(--teal); margin: 0 0 0.9rem;
}
.fusion-item__formula {
  font-family: var(--font-mono);
  font-size: 0.92rem; color: var(--text-dim);
  margin: 0 0 0.7rem; letter-spacing: 0.02em;
}
.fusion-item__formula i { font-style: normal; color: var(--teal); padding: 0 0.35em; }
.fusion-item__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2.15rem);
  margin: 0 0 0.9rem;
}
.fusion-item__desc { color: var(--text-dim); font-size: 0.98rem; max-width: 54ch; margin: 0; }

@media (max-width: 760px) {
  .fusion-item { grid-template-columns: 1fr; gap: 1.6rem; }
  .venn { margin: 0; }
  .fusion-item__ghost { top: clamp(1rem, 4vw, 2rem); right: 0; transform: none; font-size: clamp(4.5rem, 22vw, 7rem); }
}

/* ---------- Services background ---------- */
.services { overflow: hidden; }
.services__bg {
  position: absolute;
  top: -5%; right: -10%;
  width: 46rem; height: 46rem;
  z-index: 0;
  background: url("../assets/circuit.svg") center / contain no-repeat;
  opacity: 0.4;
  -webkit-mask-image: radial-gradient(circle at 70% 30%, #000 0%, transparent 70%);
          mask-image: radial-gradient(circle at 70% 30%, #000 0%, transparent 70%);
  pointer-events: none;
}

/* ---------- Services: Blueprint Quadrant (2×2 + center cross) ---------- */
.services__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
}
.svc-cell {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: clamp(1.4rem, 2.8vw, 2.6rem);
  padding: clamp(2rem, 4vw, 3.2rem);
  overflow: hidden;
}
.svc-cell:nth-child(1), .svc-cell:nth-child(2) { border-bottom: 1px solid var(--line); }
.svc-cell:nth-child(odd) { border-right: 1px solid var(--line); }
.svc-cell::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(60% 55% at 30% 22%, rgba(52, 227, 192, 0.08), transparent 70%);
  opacity: 0; transition: opacity 0.5s var(--ease);
  pointer-events: none;
}
.svc-cell:hover::before { opacity: 1; }

.svc-fig {
  flex: none;
  display: flex; align-items: center; justify-content: center;
}
.svc-fig svg { width: clamp(104px, 12vw, 150px); height: auto; overflow: visible; }
.svc-fig .s-teal, .svc-fig .s-blue {
  fill: none; stroke-width: 2;
  stroke-linecap: round; stroke-linejoin: round;
}
.svc-fig .s-teal { stroke: var(--teal); }
.svc-fig .s-blue { stroke: var(--blue); }
.svc-fig .f-teal { fill: var(--teal); stroke: none; }
.svc-fig .f-blue { fill: var(--blue); stroke: none; }
.svc-fig .flow { stroke-dasharray: 4 6; animation: svcFlow 1.7s linear infinite; }
@keyframes svcFlow { to { stroke-dashoffset: -20; } }
.svc-fig .node { transform-box: fill-box; transform-origin: center; animation: svcNode 3.2s ease-in-out infinite; }
@keyframes svcNode {
  0%, 100% { opacity: 0.5; transform: scale(0.8); }
  50%      { opacity: 1;   transform: scale(1.15); }
}
.svc-fig .svc-module { transition: transform 0.55s var(--ease); }
/* hover: enliven the diagram */
.svc-cell:hover .svc-fig svg { filter: drop-shadow(0 0 12px rgba(52, 227, 192, 0.35)); }
.svc-cell:hover .svc-fig .flow { animation-duration: 0.8s; }
.svc-cell:hover .svc-fig .svc-module { transform: translateX(22px); }

.svc-cell__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.35rem, 2.6vw, 1.8rem);
  margin: 0 0 0.8rem;
}
.svc-cell__desc { color: var(--text-dim); font-size: 0.96rem; line-height: 1.9; margin: 0; max-width: 42ch; }

@media (max-width: 760px) {
  .services__grid { grid-template-columns: 1fr; }
  .svc-cell:nth-child(odd) { border-right: none; }
  .svc-cell:nth-child(3) { border-bottom: 1px solid var(--line); }
}
@media (max-width: 560px) {
  .svc-cell { grid-template-columns: 1fr; gap: 1.5rem; }
  .svc-fig { justify-content: flex-start; }
}

/* ---------- Works (interactive index / detail) ---------- */
.works__layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: start;
}
.works__index { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.works__index li { border-bottom: 1px solid var(--line); }
.works__item {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 1.1rem;
  padding: 1.25rem 0.5rem;
  background: none; border: none; cursor: pointer;
  text-align: left; color: var(--text-dim);
  font-family: inherit;
  transition: color 0.35s, padding-left 0.4s var(--ease), background 0.35s;
}
.works__item:hover, .works__item.is-active { color: var(--text); padding-left: 1.1rem; }
.works__item.is-active { background: linear-gradient(90deg, rgba(52, 227, 192, 0.07), transparent); }
.works__no {
  font-family: var(--font-mono);
  font-size: 0.8rem; color: var(--text-mut);
  flex: none; width: 2rem;
  transition: color 0.35s;
}
.works__item:hover .works__no, .works__item.is-active .works__no { color: var(--teal); }
.works__text { display: flex; flex-direction: column; gap: 0.1rem; flex: 1; }
.works__ind { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.04em; color: var(--teal); }
.works__name { font-size: 1.02rem; font-weight: 500; line-height: 1.5; }
.works__arrow {
  flex: none; color: var(--teal);
  opacity: 0; transform: translateX(-6px);
  transition: opacity 0.35s, transform 0.35s var(--ease);
}
.works__item:hover .works__arrow, .works__item.is-active .works__arrow { opacity: 1; transform: none; }

.works__detail {
  position: sticky;
  top: 6rem;
  background: linear-gradient(180deg, var(--surface), var(--bg-2));
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: clamp(1.8rem, 3vw, 2.6rem);
  overflow: hidden;
}
.works__detail::before {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(20rem 16rem at 110% -10%, rgba(77, 124, 255, 0.18), transparent 60%),
    url("../assets/bg-blueprint.svg") right top / 140% auto no-repeat;
  opacity: 0.5;
  pointer-events: none;
}
.works__detail > * { position: relative; }
.works__detail-no {
  font-family: var(--font-mono);
  font-size: 0.82rem; letter-spacing: 0.12em;
  color: var(--text-mut); margin: 0 0 1.4rem;
}
.works__detail-ind {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.74rem; letter-spacing: 0.06em;
  color: var(--teal);
  padding: 0.25rem 0.7rem; margin: 0 0 1rem;
  border: 1px solid var(--line-strong); border-radius: 999px;
}
.works__detail-name {
  font-family: var(--font-serif);
  font-size: clamp(1.3rem, 2.6vw, 1.85rem);
  font-weight: 700; line-height: 1.45;
  margin: 0 0 1.1rem;
}
.works__detail-desc { color: var(--text-dim); font-size: 0.98rem; margin: 0 0 1.6rem; }
.works__detail-tags { list-style: none; display: flex; flex-wrap: wrap; gap: 0.5rem; padding: 0; margin: 0; }
.works__detail-tags li {
  font-family: var(--font-mono);
  font-size: 0.74rem; color: var(--text-dim);
  padding: 0.25rem 0.7rem;
  border: 1px solid var(--line); border-radius: 5px;
  background: rgba(120, 170, 220, 0.05);
}
.works__detail.is-swapping { opacity: 0.35; }
.works__detail { transition: opacity 0.25s; }

/* ---------- History / Timeline ---------- */
.timeline { list-style: none; margin: 0; padding: 0; position: relative; }
.timeline::before {
  content: ""; position: absolute; left: 0; top: 0.4rem; bottom: 0.4rem;
  width: 1px; background: linear-gradient(var(--teal), var(--blue));
}
.timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: 1.5rem;
  padding: 0 0 3rem 2.2rem;
}
.timeline__item:last-child { padding-bottom: 0; }
.timeline__item::before {
  content: ""; position: absolute; left: -5px; top: 0.5rem;
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--teal);
  box-shadow: 0 0 0 4px rgba(52, 227, 192, 0.12);
}
.timeline__year {
  font-family: var(--font-latin);
  font-weight: 800;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  background: var(--grad-fusion);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.timeline__body h3 { font-family: var(--font-serif); font-size: 1.25rem; margin-bottom: 0.4rem; }
.timeline__body p { margin: 0; color: var(--text-dim); font-size: 0.96rem; }

/* ---------- Contact ---------- */
.contact__inner {
  background: linear-gradient(180deg, var(--surface), var(--bg-2));
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: clamp(2rem, 5vw, 4rem);
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  position: relative;
  overflow: hidden;
}
.contact__inner::after {
  content: ""; position: absolute; top: -30%; right: -10%;
  width: 28rem; height: 28rem; border-radius: 50%;
  background: radial-gradient(circle, rgba(77, 124, 255, 0.18), transparent 65%);
  pointer-events: none;
}
.contact .section__head { grid-column: 1 / -1; margin-bottom: 0; }
.contact__lead { color: var(--text-dim); max-width: 46ch; margin: 1rem 0 0; }
.contact__form { display: flex; flex-direction: column; gap: 1.1rem; position: relative; }
.field { display: flex; flex-direction: column; gap: 0.45rem; }
.field label { font-size: 0.85rem; font-weight: 700; color: var(--text-dim); }
.field label span {
  font-family: var(--font-mono);
  font-size: 0.64rem; color: var(--teal); font-weight: 500;
  margin-left: 0.4rem; padding: 0.05rem 0.4rem;
  border: 1px solid var(--line-strong); border-radius: 4px;
}
.field input, .field textarea {
  font-family: inherit; font-size: 0.98rem; color: var(--text);
  background: rgba(4, 6, 13, 0.6);
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  padding: 0.85rem 1rem;
  transition: border-color 0.3s, box-shadow 0.3s;
  resize: vertical;
}
.field input::placeholder, .field textarea::placeholder { color: var(--text-mut); }
.field input:focus, .field textarea:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(52, 227, 192, 0.12);
}
.contact__note { font-size: 0.85rem; color: var(--text-dim); min-height: 1.2em; margin: 0.3rem 0 0; }
.contact__note.is-error { color: #ff7a8a; }
.contact__access { align-self: start; position: relative; }
.contact__info-label {
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.14em;
  color: var(--text-mut); margin: 0 0 0.4rem;
}
.contact__info-value { font-size: 1.05rem; color: var(--text); word-break: break-word; margin: 0 0 1rem; }

/* 固定（操作不可・ボタン非表示）の地図表示。
   iframe を枠より大きくして余白でクロップし、地図UI（ズーム/全画面/ロゴ等）を枠外へ追い出す。
   pointer-events: none でドラッグ・ズーム等の操作も無効化。 */
.contact__map-frame {
  position: relative;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  overflow: hidden;
  background: var(--bg-2);
  height: clamp(240px, 34vw, 320px);
}
.contact__map-frame iframe {
  position: absolute;
  top: -58px; left: -58px;
  width: calc(100% + 116px);
  height: calc(100% + 116px);
  border: 0;
  pointer-events: none;
  /* ダークテーマに馴染ませる地図の暗転 */
  filter: invert(0.9) hue-rotate(180deg) brightness(0.95) contrast(0.9);
}

/* ---------- Footer ---------- */
.footer {
  position: relative; z-index: 1;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 3rem clamp(1.25rem, 5vw, 3rem);
  border-top: 1px solid var(--line);
}
.footer__top {
  display: flex; flex-wrap: wrap; gap: 1.5rem;
  justify-content: space-between; align-items: center;
  margin-bottom: 2rem;
}
.footer__brand .nav__name { font-size: 1.1rem; }
.footer__links { display: flex; flex-wrap: wrap; gap: 1.2rem 1.8rem; }
.footer__links a { font-size: 0.9rem; color: var(--text-dim); transition: color 0.3s; }
.footer__links a:hover { color: var(--teal); }
.footer__copy { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-mut); margin: 0; }

/* ---------- Reveal animation ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
  will-change: opacity, transform;
}
[data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .cards--3, .cards--4 { grid-template-columns: repeat(2, 1fr); }
  .contact__inner { grid-template-columns: 1fr; }
  .works__layout { grid-template-columns: 1fr; }
  .works__detail { position: relative; top: 0; order: -1; }
}
@media (max-width: 720px) {
  .nav__links {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(78vw, 320px);
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 1.6rem;
    padding: 2rem;
    background: rgba(8, 11, 22, 0.96);
    -webkit-backdrop-filter: blur(18px);
            backdrop-filter: blur(18px);
    border-left: 1px solid var(--line);
    transform: translateX(100%);
    transition: transform 0.45s var(--ease);
  }
  .nav.is-open .nav__links { transform: translateX(0); }
  .nav__links a { font-size: 1.1rem; }
  .nav__toggle { display: flex; z-index: 60; }
  .timeline__item { grid-template-columns: 1fr; gap: 0.4rem; }
}
@media (max-width: 540px) {
  .cards--3, .cards--4 { grid-template-columns: 1fr; }
  .hero__actions .btn { flex: 1; justify-content: center; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition-duration: 0.01ms !important; }
  [data-reveal] { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}