/* ============================================================
   CSS Variables
============================================================ */
:root {
  --bg:      #060606;
  --bg2:     #0d0d0d;
  --bg3:     #111;
  --text:    #e8e8e8;
  --muted:   #555;
  --accent:  #3b82f6;
  --accent2: #93c5fd;
  --border:  #1c1c1c;
  --font:    'Inter', 'Helvetica Neue', Arial, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  cursor: none;
}

/* ============================================================
   Page Transition — 白い斜めストリップ（右→左）
============================================================ */
#page-transition {
  position: fixed;
  inset: 0;
  z-index: 9000;
  pointer-events: none;
  overflow: hidden;
}

.pt-strip {
  position: absolute;
  top: -10%;
  height: 120%;
  background: #fff;
  transform: skewX(-10deg) translateX(130vw);
}

.pt-strip:nth-child(1) { left: -6%;  width: 26%; }
.pt-strip:nth-child(2) { left: 19%;  width: 26%; }
.pt-strip:nth-child(3) { left: 44%;  width: 26%; }
.pt-strip:nth-child(4) { left: 69%;  width: 26%; }
.pt-strip:nth-child(5) { left: 94%;  width: 26%; }

/* 初期カバー状態（トランジションなし） */
.pt-strip.pt-init {
  transform: skewX(-10deg) translateX(0) !important;
  transition: none !important;
}

/* 点滅防止：モジュールスクリプト実行前に白ストリップで覆う */
[data-pt-init] .pt-strip {
  transform: skewX(-10deg) translateX(0) !important;
  transition: none !important;
}

/* カバー: 右から左へ（右端ストリップが先に入る） */
.pt-strip.pt-cover {
  transform: skewX(-10deg) translateX(0);
  transition: transform 0.5s cubic-bezier(0.86, 0, 0.07, 1);
}
.pt-strip.pt-cover:nth-child(5) { transition-delay: 0s; }
.pt-strip.pt-cover:nth-child(4) { transition-delay: 0.07s; }
.pt-strip.pt-cover:nth-child(3) { transition-delay: 0.14s; }
.pt-strip.pt-cover:nth-child(2) { transition-delay: 0.21s; }
.pt-strip.pt-cover:nth-child(1) { transition-delay: 0.28s; }

/* リビール: そのまま左へ抜ける */
.pt-strip.pt-reveal {
  transform: skewX(-10deg) translateX(-130vw);
  transition: transform 0.5s cubic-bezier(0.86, 0, 0.07, 1);
}
.pt-strip.pt-reveal:nth-child(5) { transition-delay: 0s; }
.pt-strip.pt-reveal:nth-child(4) { transition-delay: 0.07s; }
.pt-strip.pt-reveal:nth-child(3) { transition-delay: 0.14s; }
.pt-strip.pt-reveal:nth-child(2) { transition-delay: 0.21s; }
.pt-strip.pt-reveal:nth-child(1) { transition-delay: 0.28s; }

/* ── 対角ワイプ（3Dプリンターカードクリック時 右→左） ── */
#printer-wipe {
  position: fixed;
  inset: 0;
  z-index: 9000;
  background: #fff;
  pointer-events: none;
  /* 初期値：右端を超えた位置（非表示） */
  clip-path: polygon(100% 0%, 300% 0%, 300% 100%, 165% 100%);
  transition: clip-path 0.7s cubic-bezier(0.86, 0, 0.07, 1);
}

/* カバー状態：右→左に斜線が走り画面全体を白で覆う */
#printer-wipe.pw-cover {
  clip-path: polygon(-65% 0%, 300% 0%, 300% 100%, 0% 100%);
}

/* ── 3Dプリンター スクロールセクション ── */
#printer-scroll {
  height: 280vh;
  position: relative;
}

.printer-sticky {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: hidden;
  background: var(--bg);
}

.printer-sticky #printer-canvas {
  position: absolute;
  inset: 0;
  width: 100% !important;
  height: 100% !important;
}

.printer-scroll-hint {
  position: absolute;
  bottom: 36px;
  left: 56px;
  font-size: 0.65rem;
  letter-spacing: 0.25em;
  color: var(--muted);
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 2;
  transition: opacity 0.4s;
}

/* テキストオーバーレイ（ズームイン後に出現） */
.printer-text-overlay {
  position: absolute;
  bottom: 80px;
  left: 72px;
  max-width: 520px;
  z-index: 2;
  opacity: 0;
  pointer-events: none;
}

.printer-text-overlay .tool-detail-label {
  font-size: 0.65rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.printer-text-overlay h2 {
  font-size: clamp(2.2rem, 4.5vw, 3.6rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 20px;
  line-height: 1.05;
}

.printer-text-overlay p {
  color: rgba(255,255,255,0.6);
  font-size: 1.17rem;
  line-height: 1.9;
  font-weight: 300;
}

.printer-scroll-hint::before {
  content: '';
  display: block;
  width: 40px;
  height: 1px;
  background: var(--muted);
}

/* 背景モード：アニメーション完了後 */
.printer-sticky.bg-mode {
  position: fixed !important;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

/* テキストボックスセクション */
.printer-bg-section {
  position: relative;
  z-index: 5;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 80px 120px;
  border-top: none;
}

.printer-textbox {
  position: fixed;
  right: 120px;
  bottom: 80px;
  max-width: 560px;
  z-index: 5;
  background: rgba(6, 6, 6, 0.78);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid rgba(255,255,255,0.08);
  border-left: 3px solid var(--accent);
  padding: 56px 60px;
  opacity: 0;
  pointer-events: none;
}

.printer-textbox .tool-detail-label {
  font-size: 0.65rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 18px;
}

.printer-textbox h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 24px;
}

.printer-textbox p {
  color: rgba(255,255,255,0.65);
  font-size: 1.2rem;
  line-height: 1.9;
  font-weight: 300;
}

/* ============================================================
   Custom Cursor (PC only)
============================================================ */
#cursor {
  position: fixed;
  width: 60px;
  height: 60px;
  background: #fff;
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: width 0.15s, height 0.15s, opacity 0.15s;
  mix-blend-mode: difference;
}

body:not(:hover) #cursor { opacity: 0; }

/* ============================================================
   Header
============================================================ */
#header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 56px;
  transition: background 0.4s, padding 0.4s;
}

#header.scrolled {
  background: rgba(6,6,6,0.85);
  backdrop-filter: blur(12px);
  padding: 16px 56px;
  border-bottom: 1px solid var(--border);
}

#header .logo {
  font-size: 2.4rem;
  margin-left: -20px;
  font-weight: 900;
  color: #fff;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: color 0.3s;
}

/* ============================================================
   Language Switch
============================================================ */
.lang-switch {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 1.44rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  margin-left: auto;
}

.lang-btn {
  cursor: pointer;
  color: #fff;
  opacity: 0.35;
  transition: opacity 0.2s;
  user-select: none;
  padding: 2px 4px;
}

.lang-btn:hover    { opacity: 0.7; }
.lang-btn.lang-active { opacity: 1; }

.lang-sep-v {
  color: #fff;
  opacity: 0.2;
  font-weight: 300;
}

@media (max-width: 768px) {
  .lang-switch { font-size: 1.3rem; }
  .lang-btn, .lang-sep-v { color: #fff !important; }
}

/* ============================================================
   Side Nav（右固定・縦書き・斜め区切り線）
============================================================ */
#side-nav {
  position: fixed;
  right: 28px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 100;
  display: flex;
  flex-direction: column;
  align-items: center;
}

#side-nav a {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  padding: 18px 10px;
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  text-decoration: none;
  opacity: 0.45;
  transition: color 0.3s, opacity 0.2s;
}

#side-nav a:hover,
#side-nav a.nav-active { opacity: 1; }

.nav-sep {
  display: block;
  width: 36px;
  height: 1px;
  background: #fff;
  transform: rotate(-35deg);
  margin: 4px 0;
  transition: background 0.3s;
}


/* ============================================================
   Sections — 共通
============================================================ */
section {
  position: relative;
  z-index: 1;
  padding: 120px 56px;
  display: block;
  border-top: 1px solid var(--border);
}

#about, #events, #support, #sns, #tools { min-height: 100vh; }

#events { background: var(--bg3); }
#sns    { background: var(--bg3); }

/* ============================================================
   White Section — About / Support
   白いパネルが左から右へスライドイン
============================================================ */
.white-section {
  background: transparent;
  border-top-color: rgba(180,180,180,0.2);
}

.white-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  clip-path: polygon(0 0, var(--reveal-p, 0%) 0, var(--reveal-p, 0%) 100%, 0 100%);
  z-index: 0;
}

.white-section > * {
  position: relative;
  z-index: 1;
}

/* White section 内のテキスト色 */
.white-section h2 {
  color: #111;
  border-color: rgba(0,0,0,0.1);
}

.white-section .sec-num {
  color: var(--accent);
}

.white-section .sec-text p {
  color: #555;
}

.white-section .about-card {
  background: rgba(59,130,246,0.05);
  border-color: rgba(59,130,246,0.3);
}

.white-section .about-card h3 {
  color: #111;
}

.white-section .about-card p {
  color: #555;
}

.white-section .support-lead {
  color: #555;
}

/* White section 内の reveal に遅延をつけて背景のあとに出す */
.white-section .reveal {
  transition-delay: 0.35s;
}

/* Support 用の青いボタン */
.cta-blue {
  background: var(--accent);
  color: #fff;
  border: none;
}

.cta-blue:hover {
  background: #2563eb;
}

.sec-num {
  position: absolute;
  left: 80%;
  top: 50%;
  transform: translateX(-50%) translateY(-50%);
  font-size: 14rem;
  line-height: 1;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  pointer-events: none;
}

.sec-body { max-width: 800px; }

section h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 48px;
  color: #fff;
}

/* ============================================================
   Scroll Reveal
============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ============================================================
   About
============================================================ */
.sec-text p {
  color: #999;
  font-size: 1.2rem;
  margin-bottom: 20px;
  line-height: 1.9;
}

.about-card {
  margin-top: 56px;
  padding: 40px 44px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  background: rgba(59,130,246,0.04);
}

a.about-card {
  display: block;
  text-decoration: none;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}

a.about-card:hover {
  border-left-color: #2563eb;
  background: rgba(59,130,246,0.08);
}

.about-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.about-card-header h3 { margin-bottom: 0; }

.about-card-arrow {
  font-size: 1.4rem;
  color: var(--accent);
  transition: transform 0.2s;
}

a.about-card:hover .about-card-arrow {
  transform: translateX(6px);
}

.about-card-label {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-bottom: 14px;
  text-transform: uppercase;
}

.about-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.about-card p {
  color: #888;
  font-size: 1.2rem;
  line-height: 1.8;
}

/* ============================================================
   Tool Cards
============================================================ */
#tools {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  padding: 0;
  border-top: 1px solid var(--border);
}

.tool-card {
  background: var(--bg);
  display: flex;
  flex-direction: column;
  text-decoration: none;
  transition: background 0.2s;
  overflow: hidden;
}

.tool-card:hover { background: var(--bg2); }

.tool-card-img {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px;
}

.tool-card-img svg {
  width: 100%;
  max-width: 130px;
  height: auto;
  transition: transform 0.3s ease;
}

.tool-card:hover .tool-card-img svg { transform: scale(1.06); }

/* 3Dモデルキャンバス in カード */
.tool-card-img--canvas {
  padding: 0;
  overflow: hidden;
  position: relative;
}

.card-3d-canvas {
  position: absolute;
  inset: 0;
  width: 100% !important;
  height: 100% !important;
  display: block;
}

/* ズームオーバーレイ */
.zoom-overlay {
  pointer-events: none;
}

.tool-card-name {
  padding: 18px 24px;
  font-size: 2rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.06em;
  border-top: 1px solid var(--border);
}

/* ============================================================
   Tool Detail Sections
============================================================ */
.tool-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  padding: 0;
  min-height: 540px;
  border-top: 1px solid var(--border);
}

.tool-detail-canvas-wrap {
  position: relative;
  background: var(--bg);
  min-height: 480px;
  overflow: hidden;
}

#printer-canvas {
  position: absolute;
  inset: 0;
  width: 100% !important;
  height: 100% !important;
}

.tool-detail-body {
  padding: 80px 60px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  z-index: 1;
}

.tool-detail-label {
  font-size: 0.65rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

.tool-detail h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 28px;
  color: #fff;
}

.tool-detail p {
  color: #999;
  font-size: 1.2rem;
  line-height: 1.9;
}

/* white-section バリアント */
.tool-detail.white-section .tool-detail-body h2 { color: #111; }
.tool-detail.white-section .tool-detail-body p  { color: #555; }

/* 縦積みバリアント（3Dプリンター） */
.tool-detail--stacked {
  display: flex;
  flex-direction: column;
}

.tool-detail--stacked .tool-detail-canvas-wrap {
  width: 100%;
  height: 72vh;
  min-height: 480px;
}

.tool-detail--stacked .tool-detail-body {
  padding: 64px 120px;
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
}

/* AI visual */
.tool-ai-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(59,130,246,0.03);
  padding: 40px;
}

.ai-anim-svg { width: 80%; max-width: 280px; height: auto; }

.ai-node {
  animation: aiPulse 2s ease-in-out infinite;
}

.ai-node:nth-child(odd)  { animation-delay: 0s;    }
.ai-node:nth-child(even) { animation-delay: 1s; }

@keyframes aiPulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.3; }
}

/* Programming code visual */
.tool-code-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px;
}

.code-block {
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  line-height: 1.9;
  background: rgba(59,130,246,0.04);
  border: 1px solid rgba(59,130,246,0.2);
  border-left: 3px solid var(--accent);
  padding: 32px 36px;
  white-space: pre;
  overflow: auto;
  margin: 0;
}

.c-kw  { color: #93c5fd; }
.c-fn  { color: #60a5fa; }
.c-str { color: #86efac; }

/* ============================================================
   Events
============================================================ */
.event-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.event-card {
  padding: 36px;
  border: 1px solid var(--border);
  transition: border-color 0.2s;
  text-decoration: none;
  display: block;
}

.event-card:hover { border-color: var(--accent); }

.event-status {
  display: inline-block;
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 3px 10px;
  margin-bottom: 20px;
}

.event-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.event-date {
  font-size: 0.8rem;
  color: var(--accent2);
  margin-bottom: 14px;
  letter-spacing: 0.05em;
}

.event-card p {
  color: #777;
  font-size: 1.13rem;
  line-height: 1.8;
}

/* ============================================================
   Support
============================================================ */
.support-lead {
  color: #888;
  font-size: 1.25rem;
  line-height: 2;
  margin-bottom: 40px;
}

/* ============================================================
   SNS
============================================================ */
.link-row {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.link-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
  color: #fff;
  text-decoration: none;
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  transition: color 0.2s, padding-left 0.2s;
}

.link-item:first-child { border-top: 1px solid var(--border); }

.link-item:hover {
  color: var(--accent);
  padding-left: 12px;
}

.link-arrow {
  font-size: 1rem;
  color: var(--accent);
  opacity: 0;
  transition: opacity 0.2s;
}

.link-item:hover .link-arrow { opacity: 1; }

.contact-note {
  margin-top: 36px;
  color: #bbb;
  font-size: 1.05rem;
  line-height: 1.9;
  max-width: 560px;
  border-left: 3px solid var(--accent);
  padding-left: 20px;
}

.link-item--text {
  cursor: default;
  transition: none;
}

.link-item--text:hover {
  color: #fff;
  padding-left: 0;
}

.link-email {
  font-size: 1rem;
  font-weight: 400;
  color: #bbb;
  letter-spacing: 0.02em;
  user-select: all;
}

/* ============================================================
   Contact Page — 白背景・通常カーソル
============================================================ */
body.contact-page {
  background: #fff;
  cursor: auto;
}

body.contact-page #cursor { display: none; }

body.contact-page #header {
  background: rgba(255,255,255,0.95);
  border-bottom: 1px solid #e5e5e5;
}

body.contact-page #header.scrolled {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
}

body.contact-page #header .logo { color: #111; }

body.contact-page #side-nav a { color: #111; }
body.contact-page .nav-sep { background: #111; }

body.contact-page section h2 { color: #111; }

body.contact-page .contact-section { background: #fff; }

body.contact-page .form-group input,
body.contact-page .form-group textarea {
  background: #f9f9f9;
  border: 1px solid #e0e0e0;
  border-bottom: 1px solid rgba(59,130,246,0.4);
  color: #111;
}

body.contact-page .form-group input::placeholder,
body.contact-page .form-group textarea::placeholder { color: #aaa; }

body.contact-page .form-group input:focus,
body.contact-page .form-group textarea:focus {
  background: #fff;
  border-color: var(--accent);
}

body.contact-page footer {
  background: #fff;
  border-top: 1px solid #e5e5e5;
  color: #888;
}

body.contact-page .footer-logo { color: #111; }

/* ============================================================
   Contact Form
============================================================ */
.contact-section {
  min-height: 100vh;
  padding-top: 160px;
  background: var(--bg);
}

.form-group {
  margin-bottom: 32px;
}

.form-group label {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-bottom: 1px solid rgba(59,130,246,0.25);
  color: var(--text);
  font-family: var(--font);
  font-size: 1.1rem;
  padding: 16px 20px;
  outline: none;
  transition: border-color 0.2s, background 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  background: rgba(59,130,246,0.04);
}

.form-group textarea {
  resize: vertical;
  min-height: 200px;
  line-height: 1.7;
}

.contact-submit-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 18px 48px;
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: background 0.2s, gap 0.2s;
}

.contact-submit-btn:hover { background: #2563eb; gap: 18px; }
.contact-submit-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.form-notice {
  margin-top: 32px;
  padding: 24px 28px;
  font-size: 1.1rem;
  line-height: 1.8;
}

.form-success-msg {
  border: 1px solid var(--accent);
  border-left: 3px solid var(--accent);
  color: var(--accent2);
}

.form-error-msg {
  border: 1px solid #ef4444;
  border-left: 3px solid #ef4444;
  color: #fca5a5;
}

/* ============================================================
   Footer
============================================================ */
footer {
  position: relative;
  z-index: 1;
  background: var(--bg);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 32px 56px;
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.06em;
}

.footer-logo {
  font-weight: 900;
  color: #fff;
  font-size: 0.9rem;
  letter-spacing: 0.06em;
}

/* ============================================================
   スクロールスナップ（サイズ2・3 / ホームページのみ）
============================================================ */

/* ============================================================
   タブレット (1300px以下) — 数字が本文に重なるため非表示
============================================================ */
@media (max-width: 1300px) {
  /* 数字をセクション右上に移動・縮小（本文と重ならない） */
  .sec-num {
    font-size: 5.6rem;   /* 14rem × 0.4 */
    left: auto;
    right: 88px;
    top: 90px;
    transform: none;
  }

  #tools {
    grid-template-columns: repeat(3, 1fr);
    padding-top: 150px;
    background: var(--bg);
  }

  .event-grid { grid-template-columns: 1fr; }

  section {
    padding: 100px 100px 100px 48px;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
  }

  /* 3Dプリンター：オーバーレイを上部に移動、テキストボックスを縮小 */
  .printer-text-overlay {
    top: 200px;
    bottom: auto;
  }

  .printer-textbox {
    left: 24px;
    right: 24px;
    max-width: none;
    padding: 32px 36px;
  }

  .printer-textbox h2 {
    font-size: clamp(1.4rem, 2.2vw, 2rem);
    margin-bottom: 16px;
  }

  .printer-textbox p {
    font-size: 1.05rem;
    line-height: 1.75;
  }
}

/* ============================================================
   スマホ (768px以下) — 高速・シンプル
============================================================ */
@media (max-width: 768px) {

  body { cursor: auto; }
  #cursor { display: none; }
  #bg-canvas { display: none; }

  body { cursor: auto; }
  #cursor { display: none; }

  #header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 52px;
    padding: 0 20px;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    z-index: 100;
    justify-content: flex-start;
    transition: none;
  }

  #header.scrolled {
    height: 52px;
    padding: 0 20px;
    background: var(--bg);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  #header .logo {
    font-size: 1.8rem;
    line-height: 1;
    margin-left: 0;
    color: #fff !important;
  }

  #side-nav {
    position: fixed;
    top: 52px;
    left: 0;
    right: 0;
    width: 100%;
    transform: none;
    flex-direction: row;
    justify-content: center;
    gap: 24px;
    padding: 10px 20px;
    border-bottom: 1px solid var(--border);
    background: var(--bg);
    z-index: 101;
  }

  #side-nav a {
    writing-mode: horizontal-tb;
    font-size: 0.72rem;
    padding: 4px 0;
    color: #fff !important;
    opacity: 1;
  }

  .nav-sep { display: none; }

  .sec-num { top: 160px; right: 10px; }

  section {
    grid-template-columns: 1fr;
    padding: 170px 20px 64px;
  }


  #tools { grid-template-columns: 1fr; }

  /* ツールカード：横長・左文字・右画像 */
  .tool-card {
    flex-direction: row-reverse;
    min-height: 160px;
  }

  .tool-card-img {
    width: 180px;
    min-width: 180px;
    height: auto;
    aspect-ratio: auto;
    align-self: stretch;
    padding: 16px;
  }

  .tool-card-name {
    border-top: none;
    border-right: 1px solid var(--border);
    flex: 1;
    display: flex;
    align-items: center;
    font-size: 1.5rem;
  }

  .tool-detail { grid-template-columns: 1fr; }
  .tool-detail-canvas-wrap { min-height: 300px; }
  .tool-detail-body { padding: 68px 20px 48px; }
  .tool-code-visual { padding-top: 110px; }

  .printer-textbox {
    right: 16px;
    left: 16px;
    bottom: 100px;
    max-width: none;
    padding: 20px;
  }

  .printer-textbox h2 {
    font-size: 1.25rem;
    margin-bottom: 10px;
  }

  .printer-textbox p {
    font-size: 0.93rem;
    line-height: 1.7;
  }

  .printer-text-overlay {
    top: 210px;
    bottom: auto;
    left: 20px;
    max-width: calc(100% - 40px);
  }

  .printer-scroll-hint { left: 20px; }

  .event-grid { grid-template-columns: 1fr; }

  footer {
    flex-direction: column;
    gap: 10px;
    padding: 28px 20px;
    text-align: center;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}