/* ============================================
   ShareX超入門 — 原宿かわいい / ポップ デザインシステム
   ============================================ */

:root{
  --pink:      #FF6FA5;
  --pink-deep: #FF4488;
  --pink-soft: #FFE1EC;
  --yellow:    #FFD93D;
  --yellow-soft:#FFF3C4;
  --cyan:      #4DD9E8;
  --cyan-soft: #D6F9FC;
  --purple:    #9B6BFF;
  --purple-soft:#EBE0FF;
  --ink:       #3A2E3F;
  --ink-soft:  #6E5E72;
  --cream:     #FFF7F2;
  --white:     #FFFFFF;
  --dark:      #2A1E33;
  --dark-card: #3A2A45;

  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --shadow-card: 0 10px 0 rgba(58,46,63,0.08), 0 18px 34px rgba(58,46,63,0.10);
  --shadow-btn: 0 6px 0 var(--pink-deep);
  --max-w: 880px;

  color-scheme: light;
}

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

body{
  margin:0;
  background: var(--cream);
  color: var(--ink);
  font-family:"M PLUS Rounded 1c","Hiragino Maru Gothic ProN","Yu Gothic",sans-serif;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}

img{ max-width:100%; display:block; }

h1,h2,h3{ line-height:1.35; }

.skip-link{
  position:absolute; left:-999px; top:0;
  background:var(--pink); color:#fff; padding:10px 16px; border-radius:0 0 10px 0; z-index:200;
}
.skip-link:focus{ left:0; }

strong{ color:var(--pink-deep); }

/* ---------- reveal animation ---------- */
.reveal{
  opacity:0; transform:translateY(22px);
  transition:opacity .6s ease, transform .6s ease;
}
.reveal.is-visible{ opacity:1; transform:translateY(0); }

/* ============ NAV ============ */
.site-nav{
  position:sticky; top:0; z-index:100;
  background:rgba(255,247,242,0.88);
  backdrop-filter:blur(8px);
  border-bottom:3px solid var(--white);
  box-shadow:0 2px 14px rgba(58,46,63,0.06);
}
.nav-inner{
  max-width:1100px; margin:0 auto;
  display:flex; align-items:center; justify-content:space-between;
  padding:10px 20px;
}
.nav-logo{
  display:flex; align-items:center; gap:8px;
  text-decoration:none; color:var(--ink); font-weight:800; font-size:1.15rem;
}
.nav-logo-icon{ font-size:1.4rem; }
.nav-logo-sub{ color:var(--pink); margin-left:2px; }

.nav-links{ display:flex; gap:6px; }
.nav-links a{
  text-decoration:none; color:var(--ink-soft); font-weight:700; font-size:.88rem;
  padding:8px 12px; border-radius:999px; transition:background .2s, color .2s, transform .15s;
  white-space:nowrap;
}
.nav-links a:hover{ background:var(--pink-soft); color:var(--pink-deep); transform:translateY(-1px); }

.nav-toggle{
  display:none; flex-direction:column; gap:5px;
  background:none; border:none; cursor:pointer; padding:8px;
}
.nav-toggle span{ width:24px; height:3px; border-radius:2px; background:var(--pink-deep); }

/* ============ HERO ============ */
.hero{
  position:relative; overflow:hidden;
  padding:72px 20px 60px;
  text-align:center;
  background:linear-gradient(180deg,#FFF0F6 0%, var(--cream) 100%);
}
.blob{ position:absolute; border-radius:50%; filter:blur(2px); opacity:.55; z-index:0; }
.blob-1{ width:220px; height:220px; background:var(--yellow-soft); top:-60px; left:-60px; }
.blob-2{ width:260px; height:260px; background:var(--cyan-soft); bottom:-80px; right:-60px; }
.blob-3{ width:160px; height:160px; background:var(--purple-soft); top:40%; right:6%; display:none; }

.sticker{
  position:absolute; z-index:1;
  font-weight:800; font-size:.85rem;
  padding:8px 14px; border-radius:999px;
  background:var(--white); color:var(--pink-deep);
  box-shadow:var(--shadow-card);
  transform:rotate(-8deg);
}
.sticker-1{ top:18%; left:6%; background:var(--yellow); color:var(--ink); transform:rotate(-10deg); }
.sticker-2{ top:12%; right:5%; transform:rotate(9deg); }
.sticker-3{ bottom:8%; left:8%; background:var(--cyan-soft); color:var(--ink); transform:rotate(-6deg); display:none; }

.hero-inner{ position:relative; z-index:2; max-width:640px; margin:0 auto; }

.eyebrow{
  display:inline-block; font-weight:700; font-size:.82rem;
  color:var(--pink-deep); background:var(--pink-soft);
  padding:6px 16px; border-radius:999px; margin:0 0 18px;
}

.hero-logo{
  display:block; width:112px; height:112px; margin:0 auto 18px;
  border-radius:50%;
  background:var(--white);
  padding:10px;
  box-shadow:var(--shadow-card);
  animation:logoPop .6s ease .1s both;
}
@keyframes logoPop{
  0%{ transform:scale(.6) rotate(-12deg); opacity:0; }
  70%{ transform:scale(1.08) rotate(4deg); opacity:1; }
  100%{ transform:scale(1) rotate(0); }
}
@media (prefers-reduced-motion: reduce){
  .hero-logo{ animation:none; }
}

.hero-title{
  font-size:clamp(1.9rem, 6vw, 2.9rem);
  font-weight:900; margin:0 0 14px; letter-spacing:.01em;
}
.hero-title-accent{
  background:linear-gradient(90deg, var(--pink), var(--purple));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}

.hero-sub{ font-size:1.1rem; font-weight:700; margin:0 0 28px; color:var(--ink-soft); }
.hero-sub strong{ font-size:1.3em; }

.free-badges{
  display:flex; gap:10px; justify-content:center; flex-wrap:wrap;
  margin:0 0 22px;
}
.free-badge{
  position:relative; overflow:hidden;
  display:inline-flex; align-items:center; gap:6px;
  background:linear-gradient(135deg, #FFF6D8 0%, #FFD93D 55%, #FFB300 100%);
  color:#5C3D00;
  font-weight:800; font-size:.92rem;
  padding:9px 18px; border-radius:999px;
  border:2px solid #FFEFB8;
  box-shadow:0 4px 0 rgba(58,46,63,0.08), 0 0 12px rgba(255,190,0,0.45);
  animation:goldGlow 2.4s ease-in-out infinite;
}
.free-badge::after{
  content:"";
  position:absolute; top:0; left:-60%;
  width:45%; height:100%;
  background:linear-gradient(115deg, transparent, rgba(255,255,255,0.85), transparent);
  transform:skewX(-20deg);
  animation:goldShine 2.8s ease-in-out infinite;
}
@keyframes goldGlow{
  0%, 100%{ box-shadow:0 4px 0 rgba(58,46,63,0.08), 0 0 8px rgba(255,190,0,0.35); }
  50%{ box-shadow:0 4px 0 rgba(58,46,63,0.08), 0 0 18px rgba(255,190,0,0.8); }
}
@keyframes goldShine{
  0%{ left:-60%; }
  45%{ left:130%; }
  100%{ left:130%; }
}
@media (prefers-reduced-motion: reduce){
  .free-badge{ animation:none; }
  .free-badge::after{ display:none; }
}

.ai-banner{
  background:var(--white); border-radius:var(--radius-md);
  padding:22px 20px; margin:0 0 22px;
  box-shadow:var(--shadow-card);
  border:3px solid var(--pink-soft);
}
.ai-banner-line1{ margin:0 0 4px; font-weight:800; font-size:1.05rem; }
.ai-banner-line2{ margin:0; font-weight:900; font-size:1.35rem; }
.mark{
  background:linear-gradient(180deg, transparent 60%, var(--yellow) 60%);
  padding:0 4px;
}
.mark-dark{ background:linear-gradient(180deg, transparent 60%, var(--purple) 60%); color:#fff; }

.hero-note{ font-size:.92rem; color:var(--ink-soft); margin:0 0 30px; }

.cta-button{
  display:inline-block; text-decoration:none;
  background:var(--pink); color:#fff; font-weight:800; font-size:1.05rem;
  padding:16px 34px; border-radius:999px;
  box-shadow:var(--shadow-btn);
  transition:transform .15s, box-shadow .15s;
}
.cta-button:hover{ transform:translateY(-2px); }
.cta-button:active{ transform:translateY(3px); box-shadow:0 2px 0 var(--pink-deep); }

.hero-keyboard{
  position:relative; z-index:2;
  max-width:640px; margin:44px auto 0;
  background:var(--white); border-radius:var(--radius-lg);
  padding:18px 18px 20px;
  box-shadow:var(--shadow-card);
}
.hero-keyboard-img{ width:100%; border-radius:var(--radius-md); }
.key-row{ display:flex; align-items:center; gap:10px; justify-content:flex-start; flex-wrap:wrap; }
.key{
  display:inline-flex; align-items:center; justify-content:center;
  background:#fff; color:var(--ink); font-weight:800; font-size:.95rem;
  padding:10px 16px; border-radius:10px;
  box-shadow:0 4px 0 rgba(0,0,0,0.18);
  transition:transform .12s;
}
.key-wide{ background:var(--yellow); }
.key-plus{ color:var(--ink-soft); font-weight:800; }
.key-demo-note{ color:var(--pink-deep); font-weight:800; text-align:center; margin:14px 0 0; font-size:.95rem; }

/* ============ SECTION shells ============ */
.section{ padding:64px 20px; }
.section-white{ background:var(--white); }
.section-cream{ background:var(--cream); }
.section-pop{ background:linear-gradient(160deg, var(--purple-soft), var(--cyan-soft)); }
.section-dark{ background:var(--dark); color:#fff; }
.section-complete{
  background:linear-gradient(160deg, var(--pink-soft), var(--yellow-soft));
  position:relative;
}

.section-inner{ max-width:var(--max-w); margin:0 auto; }

.step-eyebrow{
  display:inline-block; font-weight:800; font-size:.85rem;
  color:var(--purple); background:var(--purple-soft);
  padding:6px 16px; border-radius:999px; margin:0 0 12px;
}
.section-title{
  font-size:clamp(1.5rem, 4.2vw, 2.1rem); font-weight:900; margin:0 0 16px;
}
.section-title.small-title{ font-size:clamp(1.3rem,3.6vw,1.7rem); text-align:center; }
.section-title.center{ text-align:center; }
.section-title.on-dark{ color:#fff; }
.section-lead{ font-size:1.02rem; color:var(--ink-soft); margin:0 0 30px; }
.section-lead.center{ text-align:center; }

/* ============ flow list (STEP0) ============ */
.flow-list{
  list-style:none; padding:0; margin:0 0 28px;
  display:flex; flex-wrap:wrap; gap:14px;
}
.flow-list li{
  display:flex; align-items:center; gap:10px;
  background:var(--pink-soft); font-weight:700;
  padding:12px 20px; border-radius:999px;
}
.flow-num{
  display:inline-flex; align-items:center; justify-content:center;
  width:26px; height:26px; border-radius:50%;
  background:var(--pink); color:#fff; font-size:.85rem; font-weight:800;
}

.dl-button{
  display:flex; align-items:center; gap:14px;
  text-decoration:none; color:var(--ink);
  background:var(--white); border:3px solid var(--yellow);
  border-radius:var(--radius-md); padding:18px 24px; max-width:380px;
  box-shadow:var(--shadow-card); transition:transform .15s;
}
.dl-button:hover{ transform:translateY(-3px); }
.dl-button-icon{ font-size:1.8rem; }
.dl-button-title{ display:block; font-weight:800; font-size:1.05rem; }
.dl-button-sub{ display:block; font-size:.82rem; color:var(--ink-soft); }

/* ============ OS download cards (STEP0) ============ */
.dl-os-cards{
  display:grid; grid-template-columns:1fr 1fr; gap:22px; margin-top:8px; align-items:stretch;
}
.dl-os-card{
  background:var(--white); border-radius:var(--radius-lg);
  padding:28px 24px; box-shadow:var(--shadow-card);
  display:flex; flex-direction:column; align-items:center; text-align:center;
}
.dl-os-win{ border:4px solid var(--pink); }
.dl-os-mac{ border:3px solid var(--purple-soft); background:var(--cream); justify-content:center; }

.dl-os-label{ font-weight:900; font-size:1.08rem; margin:0 0 4px; }
.dl-os-sub{ font-weight:700; color:var(--pink-deep); margin:0 0 20px; }

.dl-primary-btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  text-decoration:none; color:#fff; background:var(--pink);
  font-weight:800; font-size:1.02rem; text-align:center;
  padding:17px 26px; border-radius:999px; width:100%;
  box-shadow:var(--shadow-btn);
  transition:transform .15s, box-shadow .15s;
}
.dl-primary-btn:hover{ transform:translateY(-2px); }
.dl-primary-btn:active{ transform:translateY(3px); box-shadow:0 2px 0 var(--pink-deep); }

.dl-os-note{ font-size:.85rem; color:var(--ink-soft); margin:16px 0 14px; }

.dl-sub-link{
  font-size:.85rem; font-weight:700; color:var(--purple);
  text-decoration:none; border-bottom:2px solid var(--purple-soft);
  padding-bottom:2px;
}
.dl-sub-link:hover{ color:var(--pink-deep); border-color:var(--pink-soft); }

.dl-os-mac-body{ font-size:.92rem; color:var(--ink-soft); margin:0 0 20px; line-height:1.7; }
.dl-os-mac-body strong{ color:var(--purple); }

.dl-mac-links{ display:flex; flex-direction:column; gap:10px; width:100%; }
.dl-mac-links a{
  display:block; text-decoration:none; font-weight:700; font-size:.92rem;
  color:var(--ink); background:var(--white); border:2px solid var(--purple-soft);
  padding:13px 16px; border-radius:999px; transition:background .15s, transform .15s;
}
.dl-mac-links a:hover{ background:var(--purple-soft); transform:translateY(-1px); }

/* ============ taskbar notice ============ */
.taskbar-notice{
  display:flex; flex-direction:column; align-items:center;
  max-width:420px; margin:0 auto; text-align:center;
}
.taskbar-mock{
  display:flex; align-items:center; justify-content:center; gap:16px;
  background:var(--ink); border-radius:16px;
  padding:14px 22px; box-shadow:0 10px 24px rgba(58,46,63,0.22);
}
.taskbar-mock-dot{
  width:20px; height:20px; border-radius:6px;
  background:rgba(255,255,255,0.18);
}
.taskbar-icon-wrap{
  display:flex; align-items:center; justify-content:center;
  width:52px; height:52px; border-radius:14px;
  background:rgba(255,255,255,0.08);
  box-shadow:0 0 0 3px var(--yellow), 0 0 18px rgba(255,217,61,0.7);
  animation:taskbarPulse 1.8s ease-in-out infinite;
}
.taskbar-icon-img{ width:34px; height:34px; }
@keyframes taskbarPulse{
  0%, 100%{ box-shadow:0 0 0 3px var(--yellow), 0 0 14px rgba(255,217,61,0.55); }
  50%{ box-shadow:0 0 0 5px var(--yellow), 0 0 22px rgba(255,217,61,0.9); }
}
.taskbar-arrow{
  font-size:1.6rem; margin:6px 0 14px;
  animation:taskbarBounce 1.4s ease-in-out infinite;
}
@keyframes taskbarBounce{
  0%, 100%{ transform:translateY(0); }
  50%{ transform:translateY(-6px); }
}
.taskbar-notice-text{
  background:var(--white); border-radius:var(--radius-md);
  padding:18px 22px; box-shadow:var(--shadow-card);
  font-weight:600; font-size:.98rem; margin:0;
}
@media (prefers-reduced-motion: reduce){
  .taskbar-icon-wrap{ animation:none; }
  .taskbar-arrow{ animation:none; }
}

/* ============ icon cards ============ */
.icon-cards{
  display:grid; grid-template-columns:repeat(3,1fr); gap:22px; margin-bottom:32px;
}
.icon-card{
  background:var(--white); border-radius:var(--radius-lg);
  padding:22px; box-shadow:var(--shadow-card);
  border:3px solid var(--pink-soft);
  display:flex; flex-direction:column;
}
.icon-card-head{ display:flex; align-items:center; gap:10px; margin-bottom:6px; }
.icon-card-emoji{ font-size:1.6rem; }
.icon-card h3{ margin:0; font-size:1.1rem; }
.icon-card-desc{ margin:0 0 14px; font-weight:700; }
.icon-card-desc.small{ font-weight:500; font-size:.88rem; color:var(--ink-soft); margin-top:6px; }
.icon-card-warn{ color:var(--pink-deep); font-weight:800; margin:6px 0 4px; }
.icon-card-escape{ font-size:.85rem; color:var(--ink-soft); margin:0; }

.shot-img{
  display:block; width:100%; border-radius:var(--radius-sm);
  background:var(--dark); margin-bottom:6px;
  box-shadow:0 6px 18px rgba(58,46,63,0.14);
}
.shot-img-wide{ margin:0 0 28px; box-shadow:var(--shadow-card); }

.summary-box{
  background:var(--ink); color:#fff; border-radius:var(--radius-lg);
  padding:24px; text-align:center;
}
.summary-box-title{ font-weight:900; font-size:1.15rem; margin:0 0 16px; }
.summary-box-grid{
  display:grid; grid-template-columns:repeat(3,1fr); gap:14px;
}
.summary-box-grid div{ display:flex; flex-direction:column; gap:4px; }
.summary-box-grid strong{ color:var(--yellow); font-size:.98rem; }
.summary-box-grid span{ color:#fff; font-size:.88rem; }

/* ============ big key cards ============ */
.key-big-cards{ display:grid; grid-template-columns:1fr 1fr; gap:22px; margin-top:28px; }
.key-big-card{
  border-radius:var(--radius-lg); padding:28px 22px; text-align:center;
  box-shadow:var(--shadow-card);
}
.key-big-pink{ background:var(--white); border:4px solid var(--pink); }
.key-big-purple{ background:var(--white); border:4px solid var(--purple); }
.key-big-label{ font-weight:800; font-size:1.1rem; margin:0 0 18px; }
.key-row-big{ justify-content:center; margin-bottom:16px; }
.key-lg{ font-size:1.1rem; padding:14px 20px; }
.key-big-desc{ font-weight:700; margin:0; color:var(--ink-soft); }
.key-big-desc-sub{ font-size:.85rem; }
.try-key{ max-width:420px; margin:24px auto 0; }

/* ============ mini flow ============ */
.mini-flow{
  display:flex; align-items:center; justify-content:center; gap:14px; flex-wrap:wrap;
  margin-bottom:34px;
}
.mini-flow-item{
  background:var(--cyan-soft); font-weight:800; padding:12px 18px; border-radius:999px;
}
.mini-flow-arrow{ font-weight:800; color:var(--ink-soft); }

/* ============ settings preview (STEP1 intro) ============ */
.settings-preview{ text-align:center; }
.settings-preview-lead{ font-weight:700; font-size:1.02rem; color:var(--ink-soft); margin:0 0 14px; }
.settings-preview-lead strong{ font-size:1.15em; }

/* ============ step cards ============ */
.step-cards{ list-style:none; padding:0; margin:0 0 24px; display:flex; flex-direction:column; gap:14px; }
.step-card{
  display:flex; align-items:center; gap:16px;
  background:var(--white); border-radius:var(--radius-md);
  padding:16px 20px; box-shadow:var(--shadow-card);
}
.step-card p{ margin:0; font-weight:600; }
.step-card-num{
  flex:none; display:flex; align-items:center; justify-content:center;
  width:36px; height:36px; border-radius:50%;
  background:var(--purple); color:#fff; font-weight:900; font-size:1.05rem;
}

.done-banner{
  text-align:center; font-size:1.3rem; font-weight:900; color:var(--pink-deep);
  animation:pop .5s ease;
}

@keyframes pop{
  0%{ transform:scale(.7); opacity:0; }
  70%{ transform:scale(1.08); opacity:1; }
  100%{ transform:scale(1); }
}

/* ============ filename preview ============ */
.filename-preview{
  background:var(--dark); color:#fff; border-radius:var(--radius-lg);
  padding:24px; text-align:center; margin-bottom:30px;
}
.filename-preview-title{ font-weight:800; margin:0 0 12px; }
.filename-preview code{
  display:block; font-family:monospace; font-size:.95rem;
  color:var(--yellow); margin-bottom:6px;
}
.filename-preview-note{ margin:12px 0 0; font-size:.9rem; color:#e6d9ea; }

/* ============ code card ============ */
.code-card{
  display:flex; align-items:center; justify-content:space-between; gap:14px; flex-wrap:wrap;
  background:var(--ink); border-radius:var(--radius-md);
  padding:18px 22px; margin-bottom:10px;
}
.code-card code{
  font-family:monospace; font-size:1.05rem; color:var(--yellow); font-weight:700;
  word-break:break-all;
}
.copy-btn{
  flex:none; background:var(--pink); color:#fff; border:none; font-weight:800;
  padding:12px 22px; border-radius:999px; cursor:pointer; font-size:.92rem;
  box-shadow:0 4px 0 var(--pink-deep); transition:transform .12s, background .2s;
}
.copy-btn:hover{ transform:translateY(-2px); }
.copy-btn:active{ transform:translateY(2px); box-shadow:0 2px 0 var(--pink-deep); }
.copy-btn.is-copied{ background:var(--cyan); box-shadow:0 4px 0 #2fb6c4; }
.code-hint{ font-size:.85rem; color:var(--ink-soft); margin:0 0 30px; }

.code-explain, .version-note{
  background:var(--white); border-radius:var(--radius-md);
  padding:16px 20px; margin-bottom:14px; box-shadow:var(--shadow-card);
}
.code-explain summary, .version-note summary{
  cursor:pointer; font-weight:700; color:var(--purple);
}
.code-explain-list{ list-style:none; padding:0; margin:14px 0 0; display:grid; grid-template-columns:repeat(2,1fr); gap:8px; }
.code-explain-list code{ color:var(--pink-deep); font-weight:800; margin-right:6px; }
.version-note p{ margin:12px 0 0; font-size:.9rem; color:var(--ink-soft); }

/* ============ try flow ============ */
.try-flow{
  display:flex; flex-direction:column; align-items:center; gap:6px; margin-top:34px;
}
.try-flow-step{
  background:var(--white); border-radius:999px; padding:12px 24px;
  font-weight:800; box-shadow:var(--shadow-card); display:flex; align-items:center; gap:8px;
}
.try-flow-emoji{ font-size:1.2rem; }
.try-flow-arrow{ font-weight:800; color:var(--purple); }

/* ============ folder mock ============ */
.folder-mock{
  background:var(--dark); border-radius:var(--radius-lg);
  padding:26px; max-width:440px; margin:0 auto 40px;
  box-shadow:var(--shadow-card);
}
.folder-mock-title{ color:#fff; font-weight:800; margin:0 0 14px; }
.folder-mock-list{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:8px; }
.folder-file{
  font-family:monospace; color:var(--yellow); background:rgba(255,255,255,0.06);
  padding:9px 14px; border-radius:8px; font-size:.88rem;
  opacity:0; animation:fileIn .5s ease forwards;
}
.folder-file:nth-child(1){ animation-delay:.1s; }
.folder-file:nth-child(2){ animation-delay:.35s; }
.folder-file:nth-child(3){ animation-delay:.6s; }
.folder-file:nth-child(4){ animation-delay:.85s; }
@keyframes fileIn{
  from{ opacity:0; transform:translateX(-10px); }
  to{ opacity:1; transform:translateX(0); }
}

/* ============ AI flow ============ */
.ai-flow-cards{ display:grid; grid-template-columns:1fr 1fr; gap:20px; margin:30px 0; }
.ai-flow-card{
  background:var(--dark-card); border-radius:var(--radius-lg); padding:24px;
  border:2px solid rgba(255,255,255,0.08);
}
.ai-flow-steps{ display:flex; flex-direction:column; align-items:center; gap:8px; text-align:center; }
.ai-flow-steps span{ font-weight:700; }
.ai-flow-arrow{ color:var(--pink); font-weight:800; }
.ai-banner-dark{ background:var(--dark-card); border-color:transparent; }
.ai-banner-dark .ai-banner-line1{ color:#fff; }
.ai-banner-dark .ai-banner-line2{ color:#fff; }

/* ============ complete ============ */
.complete-badge{
  display:block; text-align:center; font-weight:900; font-size:1.6rem;
  color:var(--pink-deep); margin:0 0 8px;
}
.complete-grid{
  display:grid; grid-template-columns:repeat(4,1fr); gap:16px; margin:34px 0;
}
.complete-item{
  background:var(--white); border-radius:var(--radius-md); padding:20px 14px;
  text-align:center; box-shadow:var(--shadow-card);
}
.complete-emoji{ font-size:2rem; display:block; margin-bottom:10px; }
.complete-item p{ margin:0; }
.complete-item-sub{ font-size:.82rem; color:var(--ink-soft); margin-top:4px !important; }
.complete-final{ text-align:center; font-size:1.2rem; font-weight:800; }

/* ============ extra ============ */
.extra-cards-hint{ font-size:.85rem; color:var(--ink-soft); margin:0 0 16px; }
.extra-cards{ display:grid; grid-template-columns:repeat(3,1fr); gap:18px; }
.extra-card{
  display:block; text-decoration:none; color:inherit;
  background:var(--white); border-radius:var(--radius-md); padding:22px;
  text-align:center; box-shadow:var(--shadow-card);
  border:2px solid transparent;
  transition:transform .15s, border-color .15s, box-shadow .15s;
}
.extra-card:hover{ transform:translateY(-3px); border-color:var(--purple-soft); }
.extra-emoji{ font-size:1.8rem; display:block; margin-bottom:10px; }
.extra-card h3{ margin:0 0 6px; font-size:1rem; }
.extra-card p{ margin:0; font-size:.85rem; color:var(--ink-soft); }
.extra-card code{ font-family:monospace; font-size:.8rem; }
.extra-card-cta{
  display:block; margin-top:12px; font-size:.78rem; font-weight:800; color:var(--purple);
}

/* ============ footer ============ */
.site-footer{
  background:var(--dark); color:#fff; text-align:center; padding:40px 20px;
}
.footer-logo{ color:#fff; text-decoration:none; font-weight:800; font-size:1.1rem; }
.site-footer p{ margin:10px 0 0; color:#cbb9d1; font-size:.85rem; }

.share-x-btn{
  display:inline-flex; align-items:center; gap:8px;
  margin-top:26px;
  background:#fff; color:var(--dark);
  text-decoration:none; font-weight:800; font-size:.92rem;
  padding:13px 24px; border-radius:999px;
  transition:transform .15s, background .15s;
}
.share-x-btn svg{ width:16px; height:16px; fill:currentColor; }
.share-x-btn:hover{ transform:translateY(-2px); background:var(--yellow); }
.share-hint{ margin:12px 0 0 !important; font-size:.8rem; color:#cbb9d1; }

/* ============ to-top ============ */
.to-top{
  position:fixed; right:18px; bottom:18px; z-index:90;
  width:48px; height:48px; border-radius:50%;
  background:var(--pink); color:#fff; border:none; font-size:1.3rem; cursor:pointer;
  box-shadow:0 6px 16px rgba(255,68,136,0.4);
  transition:transform .15s, opacity .2s;
}
.to-top:hover{ transform:translateY(-3px); }

.sp-only{ display:none; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width:860px){
  .icon-cards{ grid-template-columns:1fr; }
  .key-big-cards{ grid-template-columns:1fr; }
  .ai-flow-cards{ grid-template-columns:1fr; }
  .complete-grid{ grid-template-columns:repeat(2,1fr); }
  .extra-cards{ grid-template-columns:repeat(2,1fr); }
  .code-explain-list{ grid-template-columns:1fr; }
  .dl-os-cards{ grid-template-columns:1fr; }
}

@media (max-width:640px){
  .sp-only{ display:inline; }
  .nav-links{
    position:fixed; top:60px; left:0; right:0;
    flex-direction:column; background:var(--white);
    padding:14px 20px; gap:2px;
    box-shadow:0 10px 20px rgba(0,0,0,0.08);
    transform:translateY(-8px); opacity:0; pointer-events:none;
    transition:opacity .2s, transform .2s;
  }
  .nav-links.is-open{ transform:translateY(0); opacity:1; pointer-events:auto; }
  .nav-links a{ padding:12px 10px; border-radius:10px; }
  .nav-toggle{ display:flex; }

  .hero{ padding:56px 16px 44px; }
  .blob-3, .sticker-3{ display:none; }
  .sticker{ font-size:.72rem; padding:6px 10px; }

  .section{ padding:48px 16px; }
  .complete-grid{ grid-template-columns:1fr 1fr; }
  .extra-cards{ grid-template-columns:1fr; }
  .summary-box-grid{ grid-template-columns:1fr; text-align:left; }

  .key{ font-size:.85rem; padding:9px 13px; }
  .key-lg{ font-size:1rem; padding:12px 16px; }

  .code-card{ flex-direction:column; align-items:stretch; text-align:center; }
  .copy-btn{ width:100%; }
}

/* ============ reduced motion ============ */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  .reveal{ transition:none; opacity:1; transform:none; }
  .folder-file{ animation:none; opacity:1; }
  .done-banner{ animation:none; }
}