/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #06060f;
  --bg-2: #0d0d1f;
  --bg-card: #111127;
  --accent: #7c5cfc;
  --accent-2: #a78bfa;
  --accent-glow: rgba(124, 92, 252, 0.35);
  --text: #e8e8f0;
  --text-muted: #8888aa;
  --border: rgba(255,255,255,0.08);
  --radius: 16px;
  --radius-sm: 10px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans JP', 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 0 24px;
  transition: background 0.3s, backdrop-filter 0.3s, border-color 0.3s;
  border-bottom: 1px solid transparent;
}

.header.scrolled {
  background: rgba(6, 6, 15, 0.85);
  backdrop-filter: blur(16px);
  border-color: var(--border);
}

.nav {
  max-width: 1100px;
  margin: 0 auto;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.04em;
}

.logo-mark {
  font-size: 22px;
  color: var(--accent);
  line-height: 1;
}

.nav-links {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 32px;
  font-size: 14px;
  font-weight: 500;
}

.nav-links a {
  color: var(--text-muted);
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--text); }

.btn-nav {
  background: var(--accent);
  color: #fff !important;
  padding: 8px 20px;
  border-radius: 100px;
  transition: opacity 0.2s, transform 0.2s !important;
}

.btn-nav:hover { opacity: 0.85; transform: translateY(-1px); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s;
}

/* ===== Mobile Menu ===== */
.mobile-menu {
  display: none;
  position: fixed;
  top: 68px; left: 0; right: 0;
  background: rgba(6, 6, 15, 0.97);
  backdrop-filter: blur(16px);
  z-index: 99;
  padding: 24px;
  border-bottom: 1px solid var(--border);
  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.3s, opacity 0.3s;
}

.mobile-menu.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu ul { list-style: none; }
.mobile-menu a {
  display: block;
  padding: 14px 0;
  font-size: 18px;
  font-weight: 500;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 100px;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
  font-family: inherit;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 24px var(--accent-glow);
}

.btn-primary:hover {
  opacity: 0.88;
  transform: translateY(-2px);
  box-shadow: 0 4px 32px var(--accent-glow);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-outline:hover {
  border-color: var(--accent-2);
  color: var(--accent-2);
  transform: translateY(-2px);
}

.btn-large { padding: 16px 40px; font-size: 16px; }

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  position: relative;
  overflow: hidden;
}

.stars {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.star {
  position: absolute;
  border-radius: 50%;
  background: #fff;
  animation: twinkle var(--dur, 3s) ease-in-out infinite;
  animation-delay: var(--delay, 0s);
}

@keyframes twinkle {
  0%, 100% { opacity: var(--min-op, 0.2); }
  50% { opacity: var(--max-op, 0.9); }
}

.hero-orb {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124,92,252,0.18) 0%, transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 760px;
}

.hero-eyebrow {
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--accent-2);
  font-weight: 500;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.hero-title {
  font-size: clamp(48px, 8vw, 88px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  background: linear-gradient(135deg, #fff 40%, var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 17px;
  color: var(--text-muted);
  line-height: 1.85;
  margin-bottom: 40px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Sections ===== */
.section { padding: 100px 24px; }

.section-dark { background: var(--bg-2); }

.container {
  max-width: 1100px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-eyebrow {
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--accent-2);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.85;
}

/* ===== Cards ===== */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.card:hover {
  transform: translateY(-6px);
  border-color: rgba(124,92,252,0.4);
  box-shadow: 0 8px 40px rgba(124,92,252,0.12);
}

.card-icon {
  font-size: 40px;
  margin-bottom: 20px;
}

.card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
}

.card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ===== About Table ===== */
.about-table-wrap {
  max-width: 760px;
  margin: 0 auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.about-table {
  width: 100%;
  border-collapse: collapse;
}

.about-table th,
.about-table td {
  padding: 20px 28px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 15px;
  line-height: 1.8;
}

.about-table tr:last-child th,
.about-table tr:last-child td {
  border-bottom: none;
}

.about-table th {
  width: 140px;
  color: var(--text-muted);
  font-weight: 500;
  white-space: nowrap;
  background: rgba(255,255,255,0.02);
}

.about-table td .sub {
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== Contact Form ===== */
.contact-form {
  max-width: 680px;
  margin: 0 auto;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.form-group label {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
}

.required { color: var(--accent-2); }

.form-group input,
.form-group textarea {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-size: 15px;
  color: var(--text);
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
  width: 100%;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(136,136,170,0.5);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group textarea { resize: vertical; min-height: 140px; }

.form-submit { text-align: center; margin-top: 8px; }

/* ===== Footer ===== */
.footer {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  padding: 48px 24px 32px;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-brand > div {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-brand p {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

.footer-links {
  display: flex;
  gap: 28px;
}

.footer-links a {
  font-size: 14px;
  color: var(--text-muted);
  transition: color 0.2s;
}

.footer-links a:hover { color: var(--text); }

.footer-bottom {
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== Helpers ===== */
.br-pc { display: inline; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .mobile-menu { display: block; }

  .form-row { grid-template-columns: 1fr; }

  .about-table th { width: 100px; padding: 16px; }
  .about-table td { padding: 16px; }

  .footer-inner { flex-direction: column; align-items: flex-start; }
  .footer-links { flex-wrap: wrap; gap: 16px; }

  .br-pc { display: none; }

  .hero-desc br { display: none; }
}

@media (max-width: 480px) {
  .hero-cta { flex-direction: column; align-items: center; }
  .btn { width: 100%; justify-content: center; }
  .about-table th, .about-table td { padding: 14px 16px; font-size: 14px; }
}