/* =================================================================
   SAKIGAKE Robotics — Phase 1
   Aesthetic direction: Modern Tech (Stripe / Linear 系)
   Display & Logo: Space Grotesk (geometric sans)
   Body:           Noto Sans JP
   Label / Mono:   JetBrains Mono
   Kanji watermark: 玉ねぎ楷書激 v7改「魁」をアウトライン化したインラインSVG（フォント非依存）
   ================================================================= */

:root {
  --bg:        #0c0c0e;
  --fg:        #f1ece2;
  --fg-mute:   #8a8a8d;
  --line:      #2a2a2c;
  --accent:    #ff4d28;
  --tech:      #6ad4ff;
  --maxw:      1280px;
  --gutter:    clamp(1.25rem, 4vw, 3rem);
  --display:   "Space Grotesk", "Noto Sans JP", system-ui, sans-serif;
  --body:      "Noto Sans JP", system-ui, -apple-system, sans-serif;
  --mono:      "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --logo:      "Space Grotesk", "Noto Sans JP", system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--body);
  font-weight: 400;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  position: relative;
  overflow-x: hidden;
}

/* Subtle dotted background grid */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, .025) 1px, transparent 1px);
  background-size: 32px 32px;
  background-position: 0 0;
  pointer-events: none;
  z-index: 0;
}

.mono {
  font-family: var(--mono);
  font-size: .82rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--fg-mute);
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

/* ---------- 漢字「魁」ウォーターマーク ---------- */
.kanji-watermark {
  position: fixed;
  right: -3vw;
  bottom: -10vh;
  width: clamp(28rem, 60vw, 56rem);
  height: auto;
  color: var(--accent);
  fill: currentColor;
  opacity: .04;
  pointer-events: none;
  user-select: none;
  z-index: 0;
}

/* ---------- ヘッダー ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 1.25rem var(--gutter);
  background: color-mix(in oklab, var(--bg) 92%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.brand-link {
  display: inline-flex;
  align-items: baseline;
  gap: .55rem;
  text-decoration: none;
  color: var(--fg);
}

.brand-mark {
  font-family: var(--logo);
  font-weight: 600;
  font-size: 1.22rem;
  letter-spacing: .08em;
}

.brand-sub {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--fg-mute);
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  gap: clamp(1rem, 3vw, 2rem);
}

.site-nav a {
  font-family: var(--mono);
  font-size: .78rem;
  letter-spacing: .12em;
  color: var(--fg-mute);
  text-decoration: none;
  position: relative;
  padding-bottom: 3px;
  transition: color .25s ease;
}

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

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .28s ease;
}

.site-nav a:hover::after { transform: scaleX(1); }

/* ---------- メイン ---------- */
main { position: relative; z-index: 1; }

.section {
  padding: clamp(4rem, 10vw, 8rem) var(--gutter);
  max-width: var(--maxw);
  margin: 0 auto;
}

.section-label {
  font-family: var(--mono);
  font-size: .76rem;
  letter-spacing: .14em;
  color: var(--accent);
  margin-bottom: 2.5rem;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: .9rem;
}

.section-label .mono { color: var(--accent); }

.section-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, var(--line), transparent);
  max-width: 280px;
}

/* ---------- HERO ---------- */
.hero {
  padding: clamp(6rem, 14vw, 12rem) var(--gutter) clamp(6rem, 12vw, 10rem);
  max-width: var(--maxw);
  margin: 0 auto;
}

.hero-grid {
  display: grid;
  gap: 2.25rem;
  grid-template-columns: 1fr;
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: .8rem;
  animation: fadeUp .9s ease both;
}

.hero-label .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 6px color-mix(in oklab, var(--accent) 22%, transparent);
  animation: pulse 2.4s ease-in-out infinite;
}

.hero-title {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(2.2rem, 6.4vw, 5.2rem);
  line-height: 1.12;
  letter-spacing: -.025em;
  margin: 0;
  color: var(--fg);
  max-width: 28ch;
}

.hero-title .line { display: block; }
.hero-title .line-1 { animation: fadeUp 1s .15s ease both; }
.hero-title .line-2 {
  animation: fadeUp 1s .35s ease both;
  font-weight: 600;
  color: var(--accent);
}

.hero-sub {
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  color: var(--fg-mute);
  max-width: 36ch;
  margin: 0;
  animation: fadeUp 1s .55s ease both;
}

.hero-meta {
  margin-top: 1rem;
  animation: fadeUp 1s .75s ease both;
}

/* ---------- ABOUT ---------- */
.about-content {
  display: grid;
  gap: 1.75rem;
  max-width: 62ch;
}

.about-lead {
  font-family: var(--display);
  font-size: clamp(1.4rem, 2.4vw, 1.95rem);
  font-weight: 500;
  line-height: 1.55;
  color: var(--fg);
  margin: 0;
}

.about em {
  font-style: normal;
  font-weight: 600;
  color: var(--accent);
}

.about-body {
  color: var(--fg-mute);
  max-width: 56ch;
  margin: 0;
}

/* ---------- PRODUCTS ---------- */
.product-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.product-card {
  position: relative;
  padding: 2.25rem 1.75rem 2rem;
  border: 1px solid var(--line);
  background: color-mix(in oklab, var(--bg) 60%, #ffffff 1.5%);
  transition: transform .35s ease, border-color .35s ease, background .35s ease;
}

.product-card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in oklab, var(--accent) 60%, var(--line));
  background: color-mix(in oklab, var(--bg) 60%, var(--accent) 4%);
}

.product-no {
  position: absolute;
  top: 1rem; right: 1rem;
  color: var(--fg-mute);
}

.product-name {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.55rem;
  letter-spacing: -.005em;
  line-height: 1.2;
  margin: 0 0 .4rem 0;
}

.product-tagline {
  font-family: var(--mono);
  font-size: .76rem;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--tech);
  margin: 0 0 1.5rem 0;
}

.product-desc {
  font-size: .96rem;
  color: var(--fg-mute);
  line-height: 1.75;
  margin: 0;
}

/* ---------- AVAILABLE NOW (PycoBlocks) ---------- */
.available-inner {
  display: grid;
  gap: 1.1rem;
  max-width: 60ch;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  width: fit-content;
}

.status-badge .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--tech);
  box-shadow: 0 0 0 6px color-mix(in oklab, var(--tech) 22%, transparent);
  animation: pulse 2.4s ease-in-out infinite;
}

.status-badge .mono {
  color: var(--tech);
  font-size: .76rem;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.available-name {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(2rem, 5vw, 3.2rem);
  letter-spacing: -.02em;
  line-height: 1.1;
  margin: .3rem 0 0 0;
}

.available-tagline {
  font-size: .78rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--fg-mute);
  margin: 0;
}

.available-desc {
  color: var(--fg-mute);
  line-height: 1.8;
  margin: .4rem 0 0 0;
}

.available-desc em {
  font-style: normal;
  font-weight: 600;
  color: var(--accent);
}

.cta-link {
  justify-self: start;
  margin-top: 1rem;
  padding: .95rem 1.8rem;
  background: var(--accent);
  color: #fff;
  font-family: var(--mono);
  font-size: .82rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid var(--accent);
  transition: transform .25s ease, background .25s ease, box-shadow .25s ease;
}

.cta-link:hover {
  background: color-mix(in oklab, var(--accent) 88%, #000);
  transform: translateX(3px);
  box-shadow: -3px 0 0 0 color-mix(in oklab, var(--accent) 40%, transparent);
}

.cta-link span {
  display: inline-block;
  margin-left: .4rem;
  transition: transform .25s ease;
}

.cta-link:hover span { transform: translateX(2px); }

/* ---------- NOTIFY ---------- */
.notify-inner {
  display: grid;
  gap: 1.5rem;
  max-width: 56ch;
}

.notify-title {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  line-height: 1.3;
  margin: 0;
  letter-spacing: -.01em;
}

.notify-body {
  color: var(--fg-mute);
  margin: 0;
}

.notify-form {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
  margin-top: .5rem;
}

.notify-form input[type="email"] {
  flex: 1 1 220px;
  min-width: 0;
  padding: .95rem 1rem;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--fg);
  font-family: var(--body);
  font-size: 1rem;
  outline: none;
  transition: border-color .2s ease, box-shadow .2s ease;
}

.notify-form input[type="email"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--accent) 25%, transparent);
}

.notify-form input[type="email"]::placeholder {
  color: var(--fg-mute);
  font-family: var(--mono);
  font-size: .9rem;
}

.notify-form button {
  padding: .95rem 1.6rem;
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
  font-family: var(--mono);
  font-size: .82rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  cursor: pointer;
  transition: transform .25s ease, background .25s ease, box-shadow .25s ease;
}

.notify-form button:hover {
  background: color-mix(in oklab, var(--accent) 88%, #000);
  transform: translateX(3px);
  box-shadow: -3px 0 0 0 color-mix(in oklab, var(--accent) 40%, transparent);
}

.notify-form button span {
  display: inline-block;
  margin-left: .35rem;
  transition: transform .25s ease;
}

.notify-form button:hover span { transform: translateX(2px); }

.notify-note {
  color: var(--fg-mute);
  margin: 0;
}

.notify-note a {
  color: var(--fg);
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  transition: color .2s ease, border-color .2s ease;
}

.notify-note a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ---------- CONTACT ---------- */
.contact-inner {
  display: grid;
  gap: 1.25rem;
  max-width: 62ch;
}

.contact-lead {
  color: var(--fg-mute);
  margin: 0;
}

.contact-mail {
  font-family: var(--display);
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 600;
  letter-spacing: -.015em;
  color: var(--accent);
  text-decoration: none;
  display: inline-block;
  border-bottom: 1px solid color-mix(in oklab, var(--accent) 50%, transparent);
  padding-bottom: .15rem;
  transition: border-color .25s ease, transform .25s ease;
  align-self: flex-start;
  width: fit-content;
}

.contact-mail:hover {
  border-color: var(--accent);
  transform: translateX(4px);
}

/* ---------- FOOTER ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 4rem;
  padding: 1.5rem var(--gutter);
  position: relative;
  z-index: 1;
}

.footer-grid {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-nav a {
  color: var(--fg-mute);
  text-decoration: none;
  transition: color .2s ease;
}

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

/* ---------- DOC PAGE (privacy.html) ---------- */
.doc-main {
  padding: clamp(4rem, 10vw, 8rem) var(--gutter);
  max-width: 720px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.doc-label {
  margin-bottom: 1.5rem;
  color: var(--accent);
}

.doc-title {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.2;
  margin: 0 0 2rem 0;
  letter-spacing: -.02em;
}

.doc-lead {
  font-family: var(--display);
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--fg);
  margin: 0 0 3rem 0;
  line-height: 1.75;
}

.doc-section { margin-bottom: 2.25rem; }

.doc-section h2 {
  font-family: var(--body);
  font-weight: 500;
  font-size: 1.05rem;
  letter-spacing: .01em;
  margin: 0 0 .6rem 0;
  display: flex;
  align-items: baseline;
  gap: .85rem;
}

.doc-section h2 .mono {
  color: var(--accent);
  font-size: .82rem;
}

.doc-section p {
  margin: 0;
  color: var(--fg-mute);
}

.doc-section p + p { margin-top: .8rem; }

.doc-mail {
  font-family: var(--mono);
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in oklab, var(--accent) 40%, transparent);
  transition: border-color .2s ease;
}

.doc-mail:hover { border-color: var(--accent); }

.doc-meta {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  color: var(--fg-mute);
}

/* ---------- アニメーション ---------- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { transform: scale(1);    opacity: .85; }
  50%      { transform: scale(1.25); opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- レスポンシブ ---------- */
@media (max-width: 768px) {
  .site-header { padding: 1rem var(--gutter); }
  .brand-sub { display: none; }
  .site-nav { gap: 1rem; }
  .site-nav a { font-size: .7rem; }

  .kanji-watermark {
    right: -8vw;
    bottom: -6vh;
    width: 28rem;
    opacity: .035;
  }

  .hero-title { font-size: clamp(1.9rem, 8vw, 3.2rem); max-width: 18ch; }
  .section-label::after { display: none; }

  .notify-form { flex-direction: column; align-items: stretch; }
  .notify-form button { justify-content: center; }
}