:root {
  --bg: #0b1020;
  --bg-soft: #111733;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-strong: rgba(255, 255, 255, 0.08);
  --border: rgba(255, 255, 255, 0.08);
  --text: #e7ecf5;
  --text-dim: #a4adc2;
  --accent: #6ee7b7;
  --accent-2: #60a5fa;
  --accent-3: #f472b6;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
  --radius: 16px;
  --max: 1100px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  margin: 0;
  font-family: "Inter", "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(800px 500px at 10% -10%, rgba(110, 231, 183, 0.12), transparent 60%),
    radial-gradient(900px 600px at 110% 10%, rgba(96, 165, 250, 0.14), transparent 60%),
    radial-gradient(700px 500px at 50% 110%, rgba(244, 114, 182, 0.10), transparent 60%);
  z-index: -1;
  pointer-events: none;
}

a {
  color: var(--accent-2);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--accent);
}

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

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(11, 16, 32, 0.65);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s ease;
}

.nav {
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text);
}

.brand img {
  width: 56px;
  height: 56px;
  object-fit: contain;
  background: #fff;
  border-radius: 12px;
  padding: 6px;
}

.brand span {
  font-size: 17px;
}

.nav-links {
  display: flex;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--text-dim);
  font-size: 14px;
  padding: 8px 14px;
  border-radius: 999px;
  transition: all 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
  background: var(--surface-strong);
}

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  width: 40px;
  height: 40px;
  border-radius: 10px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  position: relative;
}

.menu-toggle span::before,
.menu-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--text);
  transition: transform 0.25s ease;
}

.menu-toggle span::before { top: -6px; }
.menu-toggle span::after { top: 6px; }

.menu-toggle.open span { background: transparent; }
.menu-toggle.open span::before { transform: translateY(6px) rotate(45deg); }
.menu-toggle.open span::after { transform: translateY(-6px) rotate(-45deg); }

/* Sections */
main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 96px 0 32px;
  scroll-margin-top: 70px;
}

.section-eyebrow {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
  font-weight: 600;
}

.section-title {
  font-size: clamp(28px, 4vw, 40px);
  margin: 0 0 32px;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.25;
}

/* Hero */
.hero {
  padding: 140px 0 64px;
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 56px;
  align-items: center;
}

.hero-text h1 {
  font-size: clamp(36px, 5.6vw, 60px);
  font-weight: 800;
  line-height: 1.15;
  margin: 0 0 20px;
  letter-spacing: -0.02em;
}

.hero-text h1 .accent {
  background: linear-gradient(120deg, var(--accent), var(--accent-2) 60%, var(--accent-3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-text p {
  color: var(--text-dim);
  font-size: 18px;
  margin: 0 0 28px;
  max-width: 540px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn-primary {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  color: #0b1020;
  box-shadow: 0 12px 30px rgba(110, 231, 183, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 40px rgba(110, 231, 183, 0.35);
  color: #0b1020;
}

.btn-ghost {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
}

.btn-ghost:hover {
  background: var(--surface-strong);
  color: var(--text);
}

.hero-logo {
  position: relative;
  justify-self: center;
  background: #fff;
  border-radius: 28px;
  padding: 28px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.hero-logo img {
  width: 280px;
  height: 280px;
  object-fit: contain;
  display: block;
}

.hero-logo::after {
  content: "";
  position: absolute;
  inset: -20px;
  border-radius: 36px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2), var(--accent-3));
  filter: blur(40px);
  opacity: 0.35;
  z-index: -1;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 28px;
}

.tag {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  color: var(--text-dim);
}

/* Card layouts */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(110, 231, 183, 0.4);
  background: var(--surface-strong);
}

.card h3 {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 700;
}

.card p {
  margin: 0;
  color: var(--text-dim);
  font-size: 14px;
}

.card .icon {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(110, 231, 183, 0.15), rgba(96, 165, 250, 0.15));
  border: 1px solid var(--border);
  margin-bottom: 14px;
  font-size: 20px;
}

/* About */
.about {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 48px;
  align-items: start;
}

.about-avatar {
  position: relative;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  aspect-ratio: 2 / 3;
  background: var(--bg-soft);
}

.about-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}

.about-avatar::after {
  content: "";
  position: absolute;
  inset: -16px;
  border-radius: 32px;
  background: linear-gradient(135deg, var(--accent-2), var(--accent-3));
  filter: blur(40px);
  opacity: 0.25;
  z-index: -1;
}

.about-text p {
  color: var(--text-dim);
  margin: 0 0 14px;
}

.about-text .motto {
  margin-top: 22px;
}

.motto {
  background: linear-gradient(135deg, rgba(110, 231, 183, 0.08), rgba(96, 165, 250, 0.08));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

.motto h3 {
  margin: 0 0 8px;
  font-size: 16px;
  color: var(--accent);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.motto p {
  margin: 0;
  font-size: 18px;
  color: var(--text);
  font-weight: 500;
}

/* Brand */
.brand-grid {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 48px;
  align-items: center;
}

.brand-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  border-radius: 24px;
  padding: 32px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  position: relative;
}

.brand-logo::after {
  content: "";
  position: absolute;
  inset: -16px;
  border-radius: 32px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  filter: blur(36px);
  opacity: 0.25;
  z-index: -1;
}

.brand-logo img {
  width: 100%;
  max-width: 240px;
  height: auto;
}

.brand-text p {
  color: var(--text-dim);
  margin: 0 0 14px;
}

.brand-text .motto {
  margin-top: 24px;
}

@media (max-width: 860px) {
  .brand-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .brand-logo {
    max-width: 320px;
    margin: 0 auto;
  }
}

/* Timeline */
.timeline {
  position: relative;
  border-left: 2px solid var(--border);
  margin-left: 8px;
  padding-left: 28px;
}

.timeline-item {
  position: relative;
  padding-bottom: 28px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -36px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 0 4px rgba(110, 231, 183, 0.15);
}

.timeline-period {
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.06em;
}

.timeline-item h3 {
  margin: 4px 0 6px;
  font-size: 17px;
}

.timeline-item p {
  margin: 0;
  color: var(--text-dim);
  font-size: 14px;
}

/* Skills */
.skill-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.skill-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
}

.skill-block h4 {
  margin: 0 0 10px;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--accent-2);
  text-transform: uppercase;
}

.skill-block .pills {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.pill {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--surface-strong);
  color: var(--text);
  border: 1px solid var(--border);
}

/* Contact */
.contact {
  text-align: center;
  background: linear-gradient(135deg, rgba(110, 231, 183, 0.08), rgba(96, 165, 250, 0.06));
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 56px 24px;
  margin-bottom: 32px;
}

.contact p {
  color: var(--text-dim);
  max-width: 560px;
  margin: 0 auto 24px;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  text-align: center;
  color: var(--text-dim);
  font-size: 13px;
}

.site-footer a {
  color: var(--text-dim);
}

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

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: 120px;
  }

  .hero-text p { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-tags { justify-content: center; }
  .hero-logo { order: -1; }
  .hero-logo img { width: 220px; height: 220px; }

  .about {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .about-avatar {
    max-width: 280px;
    margin: 0 auto;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .nav-links {
    position: fixed;
    inset: 64px 0 auto 0;
    background: rgba(11, 16, 32, 0.95);
    backdrop-filter: blur(14px);
    flex-direction: column;
    padding: 20px;
    border-bottom: 1px solid var(--border);
    gap: 4px;
    transform: translateY(-150%);
    transition: transform 0.3s ease;
  }

  .nav-links.open {
    transform: translateY(0);
  }

  .nav-links a {
    display: block;
    padding: 12px 16px;
    border-radius: 12px;
  }
}

@media (max-width: 480px) {
  section { padding: 72px 0 16px; }
  .contact { padding: 40px 20px; }
}