/* ==========================================================================
   yasuhiro-otani.com — design system v3
   Bold editorial typography, stark black/white contrast, minimal corner
   nav, per-page distinct impact hero. Restrained monochrome + warm
   neutral accent palette (no neon, no gradients).
   ========================================================================== */

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

:root {
  --bg: #0a0a0a;
  --bg-light: #f4f1ea;
  --ink: #0a0a0a;
  --card: #141412;
  --border: #2a2a25;
  --accent: #bfae8a;
  --accent2: #8f887a;
  --accent3: #a89b7c;
  --text: #e9e6df;
  --muted: #948d7c;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Noto Sans JP', sans-serif;
  min-height: 100vh;
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
.link-accent { color: var(--accent); }
img { max-width: 100%; display: block; }
.mono { font-family: 'DM Mono', monospace; }

/* ----------------------------- layout ---------------------------------- */

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

section { padding: 64px 0; }

.section-eyebrow {
  font-family: 'DM Mono', monospace;
  font-size: .68rem;
  color: var(--muted);
  letter-spacing: .16em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.section-title {
  font-family: 'Noto Sans JP', sans-serif;
  font-weight: 900;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  letter-spacing: -.01em;
  margin-bottom: 18px;
  color: var(--text);
}

.section-title.pink { color: var(--accent2); }
.section-title.gold { color: var(--accent3); }
.section-title.cyan { color: var(--accent); }

.lead {
  font-size: .92rem;
  color: var(--muted);
  max-width: 640px;
  margin-bottom: 28px;
}

.light-section { background: var(--bg-light); color: var(--ink); }
.light-section .lead { color: #6b6558; }
.light-section .section-title { color: var(--ink); }

/* ----------------------------- corner nav -------------------------------- */

.corner-logo {
  position: fixed;
  top: 20px;
  left: 24px;
  z-index: 300;
  font-family: 'DM Mono', monospace;
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--text);
  mix-blend-mode: difference;
}

.corner-logo span { color: var(--accent2); }

.menu-trigger {
  position: fixed;
  top: 18px;
  right: 24px;
  z-index: 300;
  background: none;
  border: none;
  color: var(--text);
  font-family: 'DM Mono', monospace;
  font-size: .74rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  mix-blend-mode: difference;
}

.menu-trigger .bars {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 22px;
}

.menu-trigger .bars span {
  display: block;
  height: 1px;
  background: currentColor;
  transition: transform .25s ease, opacity .2s ease;
}

.nav-overlay.open ~ .menu-trigger .bars span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-overlay.open ~ .menu-trigger .bars span:nth-child(2) { opacity: 0; }
.nav-overlay.open ~ .menu-trigger .bars span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-12px);
  transition: opacity .3s ease, transform .3s ease, visibility 0s linear .3s;
}

.nav-overlay.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity .3s ease, transform .3s ease;
}

.nav-overlay-list {
  max-width: 1080px;
  margin: 0 auto;
  width: 100%;
}

.nav-overlay-list a {
  display: flex;
  align-items: baseline;
  gap: 18px;
  font-family: 'Noto Sans JP', sans-serif;
  font-weight: 900;
  font-size: clamp(2rem, 8vw, 4.6rem);
  letter-spacing: -.01em;
  padding: 10px 0;
  color: var(--text);
  opacity: .5;
  transition: opacity .2s, color .2s, transform .2s;
  border-bottom: 1px solid var(--border);
}

.nav-overlay-list a .idx {
  font-family: 'DM Mono', monospace;
  font-size: .8rem;
  color: var(--muted);
  font-weight: 400;
}

.nav-overlay-list a:hover,
.nav-overlay-list a.active {
  opacity: 1;
  color: var(--accent);
  transform: translateX(10px);
}

.nav-overlay-foot {
  max-width: 1080px;
  margin: 24px auto 0;
  width: 100%;
  font-family: 'DM Mono', monospace;
  font-size: .66rem;
  color: var(--muted);
  letter-spacing: .06em;
}

/* ----------------------------- glitch text ------------------------------- */

.glitch {
  position: relative;
  display: inline-block;
}

.glitch::before,
.glitch::after {
  content: attr(data-text);
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: inherit;
}

.glitch::before {
  color: var(--accent2);
  animation: glitchTop 4.5s infinite linear;
  clip-path: polygon(0 2%, 100% 2%, 100% 40%, 0 40%);
}

.glitch::after {
  color: var(--accent);
  animation: glitchBottom 3.7s infinite linear;
  clip-path: polygon(0 60%, 100% 60%, 100% 98%, 0 98%);
}

@keyframes glitchTop {
  0%, 88%, 100% { transform: translate(0, 0); opacity: 0; }
  89% { transform: translate(-6px, -2px); opacity: .85; }
  91% { transform: translate(5px, 1px); opacity: .85; }
  93% { transform: translate(-3px, 0); opacity: 0; }
}

@keyframes glitchBottom {
  0%, 91%, 100% { transform: translate(0, 0); opacity: 0; }
  92% { transform: translate(6px, 1px); opacity: .8; }
  94% { transform: translate(-5px, -1px); opacity: .8; }
  96% { transform: translate(2px, 0); opacity: 0; }
}

/* ----------------------------- scanlines / grain ------------------------- */

.scanlines {
  position: fixed;
  inset: 0;
  z-index: 250;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(255,255,255,.015) 0px,
    rgba(255,255,255,.015) 1px,
    transparent 1px,
    transparent 3px
  );
  mix-blend-mode: overlay;
}

/* ----------------------------- impact hero -------------------------------- */

.impact-hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 140px 24px 48px;
  overflow: hidden;
}

.impact-hero .hero-eyebrow {
  font-family: 'DM Mono', monospace;
  font-size: .7rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 14px;
  position: relative;
  z-index: 2;
}

.impact-hero h1 {
  font-family: 'Noto Sans JP', sans-serif;
  font-weight: 900;
  font-size: clamp(2.8rem, 11vw, 8rem);
  line-height: .96;
  letter-spacing: -.02em;
  position: relative;
  z-index: 2;
}

.impact-hero p.hero-desc {
  max-width: 520px;
  font-size: .92rem;
  color: var(--muted);
  margin-top: 20px;
  position: relative;
  z-index: 2;
}

.impact-hero.light { background: var(--bg-light); color: var(--ink); }
.impact-hero.light .hero-eyebrow { color: #8a8375; }
.impact-hero.light p.hero-desc { color: #5a5548; }

.impact-hero.compact { min-height: 56vh; padding-top: 120px; }

.impact-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  opacity: .8;
}

.hero-scroll-tag {
  position: absolute;
  bottom: 28px;
  right: 24px;
  font-family: 'DM Mono', monospace;
  font-size: .62rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
  z-index: 2;
}

/* ----------------------------- visual block (photo placeholder) ---------- */

.visual-block {
  position: relative;
  min-height: 60vh;
  background: #050505;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.visual-block::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 30% 20%, rgba(143,136,122,.10), transparent 55%),
    radial-gradient(circle at 75% 80%, rgba(191,174,138,.10), transparent 55%);
}

.visual-block .visual-label {
  position: relative;
  z-index: 1;
  font-family: 'DM Mono', monospace;
  font-size: .7rem;
  letter-spacing: .1em;
  color: var(--muted);
  border: 1px dashed rgba(168,155,124,.4);
  padding: 10px 16px;
  border-radius: 6px;
  background: rgba(168,155,124,.06);
}

.visual-block .visual-label.floating {
  position: absolute;
  bottom: 20px;
  left: 24px;
}

.portrait-silhouette {
  position: relative;
  z-index: 1;
  width: clamp(140px, 22vw, 240px);
  height: auto;
  fill: rgba(233, 230, 223, .1);
  stroke: rgba(233, 230, 223, .18);
  stroke-width: 1.5;
}

.visual-block img.visual-photo {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 20%;
}

.visual-block img.visual-photo.muted {
  filter: grayscale(.85) contrast(1.15) brightness(.65) sepia(.12);
}

/* ----------------------------- video embed -------------------------------- */

.video-embed {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  background: #050505;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.video-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.video-caption {
  font-family: 'DM Mono', monospace;
  font-size: .68rem;
  color: var(--muted);
  margin-top: 10px;
  font-style: italic;
}

blockquote.verse {
  border-left: 3px solid var(--accent3);
  padding: 4px 0 4px 18px;
  margin: 14px 0;
  font-size: .88rem;
  line-height: 2;
  color: var(--text);
}

/* ----------------------------- stat row (editorial numbers) -------------- */

.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 24px;
  margin: 24px 0;
}

.stat-row .stat {
  border-top: 1px solid var(--border);
  padding-top: 14px;
}

.light-section .stat-row .stat { border-top-color: #d8d2c2; }

.stat-num {
  font-family: 'Noto Sans JP', sans-serif;
  font-weight: 900;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--accent3);
}

.stat-label {
  font-family: 'DM Mono', monospace;
  font-size: .62rem;
  color: var(--muted);
  letter-spacing: .08em;
  margin-top: 6px;
  display: block;
}

/* ----------------------------- buttons ----------------------------------- */

.btn-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 26px;
  position: relative;
  z-index: 2;
}

.btn {
  font-family: 'DM Mono', monospace;
  font-size: .78rem;
  letter-spacing: .04em;
  padding: 12px 24px;
  border-radius: 8px;
  border: 1px solid var(--border);
  display: inline-block;
  transition: transform .15s, border-color .15s;
}

.btn:hover { transform: translateY(-2px); }

.btn.primary {
  background: rgba(191,174,138,.12);
  border-color: var(--accent);
  color: var(--accent);
}

.btn.ghost { color: var(--text); opacity: .8; }
.btn.ghost:hover { border-color: var(--accent2); opacity: 1; }

.light-section .btn { border-color: #cfc8b8; color: var(--ink); }
.light-section .btn.primary { border-color: var(--ink); color: var(--ink); background: rgba(10,10,10,.05); }

/* ----------------------------- badges ------------------------------------ */

.badge-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 18px;
  position: relative;
  z-index: 2;
}

.badge {
  font-family: 'DM Mono', monospace;
  font-size: .62rem;
  color: var(--accent);
  border: 1px solid rgba(191,174,138,.4);
  border-radius: 99px;
  padding: 5px 12px;
  letter-spacing: .06em;
}

.badge.pink { color: var(--accent2); border-color: rgba(143,136,122,.4); }
.badge.gold { color: var(--accent3); border-color: rgba(168,155,124,.4); }

/* ----------------------------- cards ------------------------------------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.light-section .card { background: #fff; border-color: #e4ded0; }

.card-icon {
  font-family: 'DM Mono', monospace;
  font-size: .95rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: .06em;
}

.card h3 { font-size: 1rem; font-weight: 700; }
.card p { font-size: .8rem; color: var(--muted); }

.card-price {
  font-family: 'DM Mono', monospace;
  font-size: .78rem;
  font-weight: 700;
  color: var(--accent3);
  letter-spacing: .02em;
}
.card-price small { display: block; font-weight: 400; color: var(--muted); font-size: .68rem; margin-top: 2px; }

.card a.card-link {
  margin-top: auto;
  font-family: 'DM Mono', monospace;
  font-size: .72rem;
  color: var(--accent2);
  font-weight: 700;
}

.concept-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent2);
  border-radius: 8px;
  padding: 16px 18px;
  font-size: .85rem;
  line-height: 1.9;
}

.concept-box strong { color: var(--accent2); }

.point-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent3);
  border-radius: 8px;
  padding: 14px 16px;
  font-size: .8rem;
  line-height: 1.9;
  margin-top: 12px;
}

.point-box strong { display: block; margin-bottom: 2px; color: var(--accent3); }
.point-box.cyan { border-left-color: var(--accent); }
.point-box.cyan strong { color: var(--accent); }
.point-box.pink { border-left-color: var(--accent2); }
.point-box.pink strong { color: var(--accent2); }

/* ----------------------------- placeholder note --------------------------- */

.placeholder-note {
  background: rgba(168, 155, 124, .08);
  border: 1px dashed rgba(168, 155, 124, .4);
  border-radius: 8px;
  padding: 10px 14px;
  font-family: 'DM Mono', monospace;
  font-size: .68rem;
  color: var(--accent3);
  margin-bottom: 20px;
}

.light-section .placeholder-note { color: #8a7a4a; background: rgba(138,122,74,.08); }

/* ----------------------------- forms --------------------------------------- */

.form-field { margin-bottom: 16px; }

.form-field label {
  display: block;
  font-family: 'DM Mono', monospace;
  font-size: .68rem;
  color: var(--muted);
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.form-field input,
.form-field textarea {
  width: 100%;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
  color: var(--text);
  font-family: 'Noto Sans JP', sans-serif;
  font-size: .85rem;
}

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

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.form-submit {
  font-family: 'DM Mono', monospace;
  font-size: .8rem;
  letter-spacing: .04em;
  padding: 12px 28px;
  border-radius: 8px;
  border: 1px solid var(--accent);
  background: rgba(191,174,138,.14);
  color: var(--accent);
  cursor: pointer;
}

.form-submit:hover { transform: translateY(-2px); }

/* ----------------------------- footer -------------------------------------- */

.site-footer {
  text-align: center;
  padding: 32px 20px;
  color: var(--muted);
  font-size: .68rem;
  border-top: 1px solid var(--border);
  margin-top: 40px;
  font-family: 'DM Mono', monospace;
}

.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--accent); }

.footer-links {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-top: 10px;
  flex-wrap: wrap;
}

.footer-social {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-top: 14px;
  flex-wrap: wrap;
  font-family: 'DM Mono', monospace;
  font-size: .64rem;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.footer-social a { color: var(--muted); }
.footer-social a:hover { color: var(--accent2); }

@media (max-width: 640px) {
  .impact-hero { padding-top: 110px; }
  .nav-overlay-list a { font-size: clamp(1.8rem, 11vw, 3rem); gap: 10px; }
  .card-grid { grid-template-columns: 1fr; }
  .stat-row { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 16px; }
  blockquote.verse { font-size: .82rem; padding-left: 14px; }
}