/* ==========================================================================
   Kagamiyato — Design System
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700;900&family=Space+Grotesk:wght@400;500;700&display=swap');

:root {
  --bg: #08090d;
  --bg-soft: #0d0f16;
  --surface: #12141d;
  --surface-2: #171a25;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #eef0f5;
  --text-dim: #9aa0b0;
  --text-faint: #5c6274;
  --accent: #7c8cff;
  --accent-2: #22d3ee;
  --accent-3: #f472b6;
  --success: #34d399;
  --warn: #fbbf24;
  --gradient: linear-gradient(120deg, #7c8cff 0%, #22d3ee 100%);
  --gradient-soft: linear-gradient(120deg, rgba(124,140,255,0.16) 0%, rgba(34,211,238,0.12) 100%);
  --radius: 18px;
  --radius-sm: 10px;
  --maxw: 1120px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

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

.display, h1, h2, h3, .logo {
  font-family: 'Space Grotesk', 'Noto Sans JP', sans-serif;
  letter-spacing: -0.02em;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { padding: 0; margin: 0; list-style: none; }

/* Background ambience */
.bg-glow {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse 60% 40% at 15% -10%, rgba(124,140,255,0.20), transparent 60%),
    radial-gradient(ellipse 50% 35% at 90% 10%, rgba(34,211,238,0.14), transparent 60%),
    radial-gradient(ellipse 60% 40% at 50% 120%, rgba(244,114,182,0.08), transparent 60%),
    var(--bg);
  pointer-events: none;
}
.bg-noise {
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.035;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }

/* ---------- Header ---------- */
header.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px) saturate(140%);
  background: rgba(8, 9, 13, 0.65);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
}
.logo {
  font-size: 20px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo .mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--gradient);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 900;
  color: #05060a;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 34px;
  font-size: 14px;
  color: var(--text-dim);
}
.nav-links a { position: relative; padding: 4px 0; transition: color .25s var(--ease); }
.nav-links a:hover { color: var(--text); }
.nav-links a.active { color: var(--text); }
.nav-links a::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -4px;
  height: 2px;
  background: var(--gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s var(--ease);
}
.nav-links a:hover::after,
.nav-links a.active::after { transform: scaleX(1); }
.nav-links .btn { padding: 8px 18px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 14.5px;
  font-weight: 500;
  border: 1px solid var(--border-strong);
  transition: all .3s var(--ease);
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary {
  background: var(--gradient);
  color: #05060a;
  border: none;
  font-weight: 700;
  box-shadow: 0 8px 30px -8px rgba(124,140,255,0.55);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 36px -8px rgba(124,140,255,0.7); }
.btn-ghost { background: rgba(255,255,255,0.03); color: var(--text); }
.btn-ghost:hover { background: rgba(255,255,255,0.08); border-color: var(--border-strong); }
.btn-disabled {
  background: rgba(255,255,255,0.03);
  color: var(--text-faint);
  border-color: var(--border);
  cursor: not-allowed;
}
.btn-sm { padding: 9px 18px; font-size: 13px; }

/* ---------- Hero ---------- */
.hero {
  padding: 128px 0 96px;
  text-align: center;
  position: relative;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--accent-2);
  background: rgba(34,211,238,0.08);
  border: 1px solid rgba(34,211,238,0.25);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 28px;
  font-weight: 500;
}
.hero h1 {
  font-size: clamp(38px, 6.4vw, 76px);
  font-weight: 700;
  margin: 0 0 22px;
  line-height: 1.12;
}
.hero h1 .grad {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p.lead {
  max-width: 620px;
  margin: 0 auto 40px;
  color: var(--text-dim);
  font-size: 17px;
  line-height: 1.9;
}
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.stats-row {
  display: flex;
  justify-content: center;
  gap: 56px;
  margin-top: 84px;
  flex-wrap: wrap;
}
.stat { text-align: center; }
.stat .num {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 34px;
  font-weight: 700;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat .label { font-size: 13px; color: var(--text-faint); margin-top: 4px; }

/* ---------- Sections ---------- */
section { padding: 100px 0; position: relative; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 64px; }
.section-head .eyebrow { margin-bottom: 18px; }
.section-head h2 { font-size: clamp(28px, 4vw, 42px); margin: 0 0 16px; }
.section-head p { color: var(--text-dim); font-size: 15.5px; }

/* ---------- App Cards ---------- */
.grid-apps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.card-app {
  background: linear-gradient(180deg, var(--surface), var(--surface-2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  position: relative;
  overflow: hidden;
  transition: transform .4s var(--ease), border-color .4s var(--ease), box-shadow .4s var(--ease);
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.card-app::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-soft);
  opacity: 0;
  transition: opacity .4s var(--ease);
  pointer-events: none;
}
.card-app:hover {
  transform: translateY(-6px);
  border-color: var(--border-strong);
  box-shadow: 0 24px 48px -20px rgba(0,0,0,0.6);
}
.card-app:hover::before { opacity: 1; }
.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 900;
  color: #05060a;
}
.card-app h3 { font-size: 20px; margin: 0; }
.card-app p { color: var(--text-dim); font-size: 14.5px; margin: 0; flex-grow: 1; }
.card-app .tags { display: flex; gap: 8px; flex-wrap: wrap; }
.tag {
  font-size: 11.5px;
  padding: 5px 11px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  color: var(--text-dim);
  letter-spacing: 0.02em;
}
.status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 500;
}
.status .dot { width: 7px; height: 7px; border-radius: 50%; }
.status.live .dot { background: var(--success); box-shadow: 0 0 8px var(--success); }
.status.live { color: var(--success); }
.status.dev .dot { background: var(--warn); box-shadow: 0 0 8px var(--warn); }
.status.dev { color: var(--warn); }
.card-app .row-bottom { display: flex; align-items: center; justify-content: space-between; margin-top: 6px; }
.card-app .more { font-size: 13.5px; color: var(--accent-2); display: inline-flex; align-items: center; gap: 4px; transition: gap .25s var(--ease); }
.card-app:hover .more { gap: 8px; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.in-view { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: .08s; }
.reveal-delay-2 { transition-delay: .16s; }
.reveal-delay-3 { transition-delay: .24s; }
.reveal-delay-4 { transition-delay: .32s; }

/* ---------- About / philosophy ---------- */
.philosophy {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 64px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.philosophy .quote {
  font-size: 24px;
  line-height: 1.65;
  font-weight: 500;
}
.philosophy .quote .grad {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.principle-list { display: flex; flex-direction: column; gap: 22px; }
.principle { display: flex; gap: 16px; }
.principle .num {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 13px;
  color: var(--accent-2);
  border: 1px solid var(--border-strong);
  border-radius: 50%;
  width: 30px; height: 30px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.principle h4 { margin: 0 0 4px; font-size: 15.5px; }
.principle p { margin: 0; font-size: 13.5px; color: var(--text-dim); }

/* ---------- Detail page ---------- */
.detail-hero {
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--border);
}
.breadcrumb { font-size: 13px; color: var(--text-faint); margin-bottom: 28px; display: flex; gap: 8px; align-items: center; }
.breadcrumb a:hover { color: var(--text-dim); }
.detail-head { display: flex; gap: 28px; align-items: flex-start; flex-wrap: wrap; }
.detail-icon {
  width: 76px; height: 76px;
  border-radius: 20px;
  background: var(--gradient);
  display: flex; align-items: center; justify-content: center;
  font-size: 30px; font-weight: 900; color: #05060a;
  flex-shrink: 0;
}
.detail-head h1 { font-size: clamp(28px, 4.5vw, 44px); margin: 0 0 10px; }
.detail-head .sub { color: var(--text-dim); font-size: 15.5px; max-width: 560px; }
.detail-meta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 18px; }
.detail-actions { display: flex; gap: 14px; margin-top: 28px; flex-wrap: wrap; }

.detail-body {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 56px;
  padding: 64px 0;
  align-items: start;
}
.detail-body h2 { font-size: 22px; margin: 0 0 20px; }
.feature-list { display: flex; flex-direction: column; gap: 0; margin-bottom: 48px; }
.feature-item {
  display: flex; gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}
.feature-item:last-child { border-bottom: none; }
.feature-item .ico {
  width: 34px; height: 34px; border-radius: 9px;
  background: rgba(124,140,255,0.12);
  border: 1px solid rgba(124,140,255,0.3);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent-2); flex-shrink: 0; font-size: 15px;
}
.feature-item p { margin: 0; font-size: 14.5px; color: var(--text-dim); line-height: 1.8; }
.feature-item strong { color: var(--text); font-weight: 500; display: block; margin-bottom: 3px; }

.note-box {
  background: rgba(251,191,36,0.06);
  border: 1px solid rgba(251,191,36,0.25);
  border-radius: var(--radius-sm);
  padding: 20px 22px;
  font-size: 13.5px;
  color: var(--text-dim);
  margin-bottom: 24px;
}
.note-box strong { color: var(--warn); display: block; margin-bottom: 6px; font-size: 13px; }

.sidebar-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  margin-bottom: 20px;
}
.sidebar-card h4 { font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-faint); margin: 0 0 16px; }
.meta-row { display: flex; justify-content: space-between; font-size: 13.5px; padding: 10px 0; border-bottom: 1px solid var(--border); }
.meta-row:last-child { border-bottom: none; }
.meta-row .k { color: var(--text-faint); }
.meta-row .v { color: var(--text); text-align: right; }

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--border);
  padding: 56px 0 32px;
  margin-top: 60px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-brand p { color: var(--text-dim); font-size: 13.5px; max-width: 300px; margin-top: 14px; }
.footer-col h5 { font-size: 12.5px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-faint); margin: 0 0 16px; }
.footer-col ul { display: flex; flex-direction: column; gap: 11px; }
.footer-col a { font-size: 13.5px; color: var(--text-dim); transition: color .25s var(--ease); }
.footer-col a:hover { color: var(--text); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 28px; border-top: 1px solid var(--border);
  font-size: 12.5px; color: var(--text-faint); flex-wrap: wrap; gap: 12px;
}

/* ---------- Legal pages ---------- */
.legal { padding: 90px 0 120px; max-width: 760px; margin: 0 auto; }
.legal h1 { font-size: 34px; margin-bottom: 8px; }
.legal .updated { color: var(--text-faint); font-size: 13px; margin-bottom: 48px; }
.legal h2 { font-size: 19px; margin: 44px 0 14px; padding-top: 4px; }
.legal p, .legal li { color: var(--text-dim); font-size: 14.5px; line-height: 1.95; }
.legal ul { padding-left: 20px; list-style: disc; display: block; }
.legal li { margin-bottom: 8px; }
.legal table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 14px; }
.legal table th, .legal table td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--border); color: var(--text-dim); }
.legal table th { color: var(--text-faint); font-weight: 500; width: 30%; }

/* ---------- Pricing block ---------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 20px 0 36px;
}
.price-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 22px;
}
.price-card.highlight { border-color: rgba(124,140,255,0.4); background: linear-gradient(180deg, var(--surface), var(--surface-2)); }
.price-card .plan-name { font-size: 12.5px; color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 10px; }
.price-card .plan-price { font-family: 'Space Grotesk', sans-serif; font-size: 26px; font-weight: 700; margin-bottom: 6px; }
.price-card .plan-price small { font-size: 13px; font-weight: 400; color: var(--text-faint); }
.price-card .plan-note { font-size: 12.5px; color: var(--text-dim); }

/* ---------- Contact modal ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5,6,10,0.7);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s var(--ease);
}
.modal-overlay.open { opacity: 1; pointer-events: auto; }
.modal-box {
  width: 100%;
  max-width: 460px;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 32px;
  transform: translateY(16px) scale(0.98);
  transition: transform .3s var(--ease);
  box-shadow: 0 30px 80px -20px rgba(0,0,0,0.7);
}
.modal-overlay.open .modal-box { transform: translateY(0) scale(1); }
.modal-box h3 { font-size: 19px; margin: 0 0 6px; }
.modal-box .modal-desc { font-size: 13px; color: var(--text-dim); margin: 0 0 22px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 12.5px; color: var(--text-faint); margin-bottom: 7px; }
.field input, .field textarea {
  width: 100%;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
  resize: vertical;
  transition: border-color .25s var(--ease);
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--accent); }
.field-hp { position: absolute; left: -9999px; top: -9999px; }
.modal-actions-row { display: flex; gap: 10px; justify-content: flex-end; margin-top: 22px; }
.modal-status { font-size: 13px; margin-top: 14px; min-height: 18px; }
.modal-status.success { color: var(--success); }
.modal-status.error { color: var(--accent-3); }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .nav-links { display: none; }
  .philosophy { grid-template-columns: 1fr; padding: 40px 28px; }
  .detail-body { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .stats-row { gap: 32px; }
}