:root {
  --bg-dark: #0A0F0B;
  --bg-dark-surface: #10160F;
  --bg-light: #F6F8F5;
  --bg-light-surface: #EFF3EC;
  --ink: #10160D;
  --ink-muted: #5B6659;
  --ink-inverse: #E9F1E6;
  --ink-inverse-muted: #97A793;
  --accent: #2E9E4C;
  --accent-bright: #8CE06A;
  --accent-deep: #123018;
  --border-light: #DDE5D9;
  --border-dark: #23301F;

  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --space-7: 96px;
  --space-8: 128px;

  --radius-sm: 6px;
  --radius-md: 12px;

  --font-display: "Zen Kaku Gothic New", "Space Grotesk", sans-serif;
  --font-body: "Noto Sans JP", "Space Grotesk", sans-serif;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg-light);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-anchor: none;
}

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

a {
  color: inherit;
}

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: var(--space-1) var(--space-2);
  z-index: 100;
}
.skip-link:focus {
  left: var(--space-2);
  top: var(--space-2);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 11px 22px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 180ms var(--ease-out), background-color 180ms var(--ease-out), border-color 180ms var(--ease-out);
}
.btn:focus-visible {
  outline: 2px solid var(--accent-bright);
  outline-offset: 3px;
}
.btn-accent {
  background: var(--accent);
  color: #fff;
}
.btn-accent:hover {
  background: #268a42;
  transform: translateY(-1px);
}
.btn-accent:active {
  transform: translateY(0);
}
.btn-ghost {
  background: transparent;
  border-color: var(--border-light);
  color: var(--ink);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.btn-lg {
  padding: 15px 30px;
  font-size: 1.05rem;
}

/* ---------- Scroll progress ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-bright), var(--accent));
  z-index: 60;
  transition: width 80ms linear;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 15, 11, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-dark);
  transition: box-shadow 250ms var(--ease-out), background-color 250ms var(--ease-out);
}
.site-header.is-scrolled {
  background: rgba(8, 12, 9, 0.98);
  box-shadow: 0 8px 30px -18px rgba(0, 0, 0, 0.6);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  height: 72px;
  transition: height 250ms var(--ease-out);
}
.site-header.is-scrolled .header-inner {
  height: 60px;
}
.site-header.is-scrolled .brand-logo {
  height: 48px;
}
.brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  margin-right: auto;
}
.brand-logo {
  height: 60px;
  width: auto;
  filter: brightness(1.15);
  transition: filter 200ms var(--ease-out);
}
.brand:hover .brand-logo {
  filter: brightness(1.35) drop-shadow(0 0 10px rgba(140, 224, 106, 0.5));
}
.main-nav {
  display: flex;
  gap: var(--space-4);
}
.main-nav a {
  position: relative;
  color: var(--ink-inverse-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  padding-bottom: 4px;
  transition: color 150ms var(--ease-out);
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-bright), var(--accent));
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 250ms var(--ease-out);
}
.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--accent-bright);
}
.main-nav a:hover::after,
.main-nav a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}
.header-cta {
  padding: 9px 18px;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 34px;
  height: 34px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--ink-inverse);
  border-radius: 2px;
  transition: transform 200ms var(--ease-out), opacity 200ms var(--ease-out);
}
.nav-toggle:focus-visible {
  outline: 2px solid var(--accent-bright);
  outline-offset: 2px;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background: var(--bg-dark);
  color: var(--ink-inverse);
  overflow: hidden;
  padding: var(--space-8) 0 var(--space-7);
}
.hero-aurora {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}
.aurora-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.35;
  will-change: transform;
}
.blob-1 {
  width: 480px;
  height: 480px;
  top: -160px;
  right: -80px;
  background: radial-gradient(circle, var(--accent-bright), transparent 70%);
  animation: driftOne 16s ease-in-out infinite;
}
.blob-2 {
  width: 380px;
  height: 380px;
  bottom: -140px;
  left: 8%;
  background: radial-gradient(circle, var(--accent), transparent 70%);
  animation: driftTwo 20s ease-in-out infinite;
}
@keyframes driftOne {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-40px, 30px) scale(1.1); }
}
@keyframes driftTwo {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -20px) scale(1.08); }
}
.hero-hex-field {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  animation: hexDrift 40s linear infinite;
}
@keyframes hexDrift {
  0% { transform: translate(0, 0); }
  100% { transform: translate(-24px, -18px); }
}
.hero-spotlight {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: radial-gradient(600px circle at var(--x, 50%) var(--y, 30%), rgba(140, 224, 106, 0.12), transparent 60%);
  pointer-events: none;
}
.hero-panel {
  position: absolute;
  top: -10%;
  right: -12%;
  width: 55%;
  height: 130%;
  background: linear-gradient(160deg, var(--accent) 0%, var(--accent-deep) 100%);
  clip-path: polygon(38% 0, 100% 0, 100% 100%, 12% 100%);
  opacity: 0.16;
  z-index: 0;
}
.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-5);
  align-items: center;
}
.hero-copy {
  max-width: 640px;
}
.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 340px;
}
.hero-visual-ring {
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  border: 1px solid var(--border-dark);
  animation: spinSlow 30s linear infinite;
}
.hero-visual-ring::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 50%;
  width: 8px;
  height: 8px;
  background: var(--accent-bright);
  border-radius: 50%;
  box-shadow: 0 0 16px 4px rgba(140, 224, 106, 0.6);
}
@keyframes spinSlow {
  to { transform: rotate(360deg); }
}
.hero-visual-logo {
  position: relative;
  width: 78%;
  max-width: 340px;
  filter: drop-shadow(0 0 34px rgba(46, 158, 76, 0.45));
  animation: floatLogo 5s ease-in-out infinite;
}
@keyframes floatLogo {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}
.eyebrow {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--accent-bright);
  margin: 0 0 var(--space-3);
}
.hero-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-3);
}
.grad-text {
  background: linear-gradient(100deg, var(--accent-bright), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-lead {
  font-size: 1.05rem;
  color: var(--ink-inverse-muted);
  max-width: 52ch;
  margin: 0 0 var(--space-4);
}
.hero-actions {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.hero .btn-ghost {
  border-color: var(--border-dark);
  color: var(--ink-inverse);
}
.hero .btn-ghost:hover {
  border-color: var(--accent-bright);
  color: var(--accent-bright);
}

/* ---------- Section titles ---------- */
.section-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.8rem, 3.4vw, 2.4rem);
  letter-spacing: -0.01em;
  margin: 0 0 var(--space-1);
}
.section-lead {
  color: var(--ink-muted);
  margin: 0 0 var(--space-5);
  max-width: 60ch;
}

/* ---------- Services ---------- */
.services {
  padding: var(--space-7) 0;
}
.service-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}
.service-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  transform-style: preserve-3d;
  transition: transform 200ms var(--ease-out), box-shadow 200ms var(--ease-out), border-color 200ms var(--ease-out);
  will-change: transform;
}
.service-card:hover {
  border-color: var(--accent);
  box-shadow: 0 20px 40px -22px rgba(20, 60, 30, 0.4);
}
.service-icon {
  width: 34px;
  height: 34px;
  color: var(--accent);
  margin-bottom: var(--space-2);
  transition: transform 300ms var(--ease-out);
}
.service-card:hover .service-icon {
  transform: scale(1.12) rotate(-6deg);
}
.service-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 0 6px;
}
.service-card p {
  color: var(--ink-muted);
  margin: 0;
  font-size: 0.95rem;
}

/* ---------- Process ---------- */
.process {
  background: var(--bg-light-surface);
  padding: var(--space-7) 0;
}
.eyebrow-dark {
  color: var(--accent);
}
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-4);
}
.process-step-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: var(--space-1);
}
.process-num {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  flex: none;
  width: 44px;
  height: 40px;
  transition: transform 250ms var(--ease-out);
}
.process-step:hover .process-num {
  transform: translateY(-3px) scale(1.06);
}
.process-num svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.process-num polygon {
  fill: var(--accent);
}
.process-num span {
  position: relative;
  z-index: 1;
  color: #fff;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.05rem;
}
.process-step h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0;
}
.process-step p {
  color: var(--ink-muted);
  margin: 0;
  font-size: 0.92rem;
}
.process-grid .reveal:nth-child(1) { transition-delay: 0ms; }
.process-grid .reveal:nth-child(2) { transition-delay: 90ms; }
.process-grid .reveal:nth-child(3) { transition-delay: 180ms; }
.process-grid .reveal:nth-child(4) { transition-delay: 270ms; }

/* ---------- About ---------- */
.about {
  padding: var(--space-7) 0;
}
.about-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--space-5);
  align-items: center;
}
.about-text p {
  color: var(--ink-muted);
  max-width: 56ch;
}
.about-mark {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.about-mark img {
  position: relative;
  width: 100%;
  max-width: 260px;
  margin: 0 auto;
  animation: breathe 6s ease-in-out infinite;
}
.about-mark-glow {
  position: absolute;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(140, 224, 106, 0.35), transparent 70%);
  filter: blur(20px);
  border-radius: 50%;
  animation: breathe 6s ease-in-out infinite;
}
@keyframes breathe {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.05); opacity: 0.85; }
}

/* ---------- Contact ---------- */
.contact {
  position: relative;
  background: var(--bg-dark);
  color: var(--ink-inverse);
  padding: var(--space-7) 0;
  overflow: hidden;
}
.contact-panel {
  position: absolute;
  left: -15%;
  bottom: -30%;
  width: 50%;
  height: 140%;
  background: linear-gradient(200deg, var(--accent) 0%, var(--accent-deep) 100%);
  clip-path: polygon(0 0, 70% 0, 40% 100%, 0 100%);
  opacity: 0.14;
  z-index: 0;
}
.contact-inner {
  position: relative;
  z-index: 1;
}
.contact .section-lead {
  color: var(--ink-inverse-muted);
}
.contact-card {
  background: var(--bg-dark-surface);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  max-width: 420px;
}
.contact-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  margin: 0 0 var(--space-2);
}
.contact-name span {
  color: var(--ink-inverse-muted);
  font-weight: 500;
  font-size: 0.9rem;
}
.contact-list {
  list-style: none;
  margin: 0 0 var(--space-3);
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.contact-list li {
  display: flex;
  gap: var(--space-2);
  font-size: 0.95rem;
  border-bottom: 1px solid var(--border-dark);
  padding-bottom: 10px;
}
.contact-list a {
  text-decoration: none;
  color: var(--ink-inverse);
}
.contact-list a:hover,
.contact-list a:focus-visible {
  color: var(--accent-bright);
}
.contact-label {
  color: var(--ink-inverse-muted);
  min-width: 4.5em;
  font-size: 0.85rem;
}
.contact-cta {
  width: 100%;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--bg-dark);
  border-top: 1px solid var(--border-dark);
  padding: var(--space-3) 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}
.footer-inner p {
  color: var(--ink-inverse-muted);
  font-size: 0.85rem;
  margin: 0;
}
.footer-logo {
  height: 34px;
  width: auto;
}

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 500ms var(--ease-out), transform 500ms var(--ease-out);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .btn,
  .service-card,
  .brand-logo,
  .service-icon,
  .process-num {
    transition: none;
  }
  .process-grid .reveal {
    transition-delay: 0ms;
  }
  .aurora-blob,
  .hero-hex-field,
  .hero-visual-ring,
  .hero-visual-logo,
  .about-mark img,
  .about-mark-glow {
    animation: none !important;
  }
}

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .service-grid {
    grid-template-columns: 1fr;
  }
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .about-inner {
    grid-template-columns: 1fr;
  }
  .about-mark {
    order: -1;
  }
  .about-mark img {
    max-width: 160px;
  }
  .about-mark-glow {
    width: 160px;
    height: 160px;
  }
  .hero-inner {
    grid-template-columns: 1fr;
  }
  .hero-visual {
    height: 220px;
    order: -1;
  }
  .hero-visual-ring {
    width: 200px;
    height: 200px;
  }
}

@media (max-width: 720px) {
  .header-cta {
    display: none;
  }
  .main-nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg-dark-surface);
    border-bottom: 1px solid var(--border-dark);
    flex-direction: column;
    padding: var(--space-2) var(--space-3);
    gap: var(--space-2);
    display: none;
  }
  .main-nav.is-open {
    display: flex;
  }
  .nav-toggle {
    display: flex;
  }
  .nav-toggle.is-open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .nav-toggle.is-open span:nth-child(2) {
    opacity: 0;
  }
  .nav-toggle.is-open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
  .hero {
    padding: var(--space-6) 0 var(--space-5);
  }
  .process-grid {
    grid-template-columns: 1fr;
  }
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
}