:root{
  --pink:#E91B89;
  --purple:#7B37A8;
  --blue:#5BAADE;
  --gradient:linear-gradient(135deg,#E91B89 0%,#7B37A8 50%,#5BAADE 100%);
  --ink:#1A1A1A;
  --ink-2:#2C2C2C;
  --ink-3:#3A3A3A;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.14);
  --text:#EDEDED;
  --text-mute:#9A9A9A;
  --bg:#101012;
  --panel:#17171A;
  --panel-2:#1E1E22;
  --radius:6px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:'Zen Kaku Gothic New','Noto Sans JP',system-ui,sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:14px;
  line-height:1.55;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}

/* ---------- TOPBAR ---------- */
.topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:14px 24px;
  border-bottom:1px solid var(--line);
  background:rgba(16,16,18,.85);
  backdrop-filter:blur(8px);
  position:sticky;top:0;z-index:50;
}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);text-decoration:none;font-family:'Oswald',sans-serif;letter-spacing:.08em}
.brand-mark{
  display:inline-grid;place-items:center;
  width:34px;height:34px;
  background:var(--gradient);
  font-weight:700;font-size:14px;
  color:#fff;
  border-radius:4px;
}
.brand-name{font-size:18px;font-weight:600}
.topnav{display:flex;gap:18px}
.topnav a{color:var(--text-mute);text-decoration:none;font-size:13px;font-weight:500;letter-spacing:.04em}
.topnav a:hover{color:var(--text)}

/* ---------- STUDIO LAYOUT ---------- */
.studio{
  flex:1;
  display:grid;
  grid-template-columns:340px 1fr;
  gap:0;
  min-height:0;
}
.panel{
  background:var(--panel);
  border-right:1px solid var(--line);
  padding:20px 18px;
  overflow-y:auto;
  max-height:calc(100vh - 63px);
}
.stage{
  display:flex;
  flex-direction:column;
  padding:24px;
  gap:14px;
  min-width:0;
}

/* ---------- BLOCK ---------- */
.block{
  margin-bottom:18px;
  padding-bottom:18px;
  border-bottom:1px solid var(--line);
}
.block:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}
.block-title{
  font-family:'Oswald',sans-serif;
  font-size:12px;
  font-weight:600;
  letter-spacing:.18em;
  margin:0 0 12px;
  color:var(--text-mute);
  text-transform:uppercase;
}
details.block > summary.block-title{
  cursor:pointer;
  list-style:none;
  position:relative;
  padding-right:20px;
}
details.block > summary.block-title::-webkit-details-marker{display:none}
details.block > summary.block-title::after{
  content:"+";
  position:absolute;right:0;top:-2px;
  font-size:16px;color:var(--text-mute);
  transition:transform .15s;
}
details.block[open] > summary.block-title::after{content:"−"}

/* ---------- FORM FIELDS ---------- */
.file-field,.text-field,.toggle{display:block;margin-bottom:10px}
.text-field span,.file-label{
  display:block;
  font-size:11px;
  color:var(--text-mute);
  margin-bottom:4px;
  letter-spacing:.02em;
}
.text-field input[type=text],
.text-field input[type=number],
.text-field textarea,
.text-field select{
  width:100%;
  padding:8px 10px;
  background:var(--panel-2);
  border:1px solid var(--line-2);
  border-radius:var(--radius);
  color:var(--text);
  font-family:inherit;
  font-size:13px;
  transition:border-color .15s,background .15s;
}
.text-field input[type=range]{width:100%}
.text-field input[type=color]{
  width:100%;height:34px;
  background:var(--panel-2);
  border:1px solid var(--line-2);
  border-radius:var(--radius);
  cursor:pointer;
}
.text-field textarea{resize:vertical;font-family:'JetBrains Mono','Consolas',monospace;font-size:12px}
.text-field input:focus,.text-field textarea:focus,.text-field select:focus{
  outline:none;border-color:var(--pink);
}
.file-field input[type=file]{
  width:100%;
  font-size:12px;
  color:var(--text-mute);
  padding:8px 0;
}
.file-status{
  display:inline-block;
  font-size:11px;
  color:var(--text-mute);
  margin-top:2px;
}

/* ---------- FILE DROP (custom clickable area) ---------- */
.file-hidden{
  position:absolute;
  width:1px;height:1px;
  opacity:0;
  pointer-events:none;
}
.file-drop{
  display:block;
  border:2px dashed var(--line-2);
  border-radius:6px;
  padding:18px 12px;
  background:var(--panel-2);
  cursor:pointer;
  text-align:center;
  transition:all .15s;
  margin-bottom:10px;
  position:relative;
}
.file-drop:hover{
  border-color:var(--pink);
  background:rgba(233,27,137,0.06);
}
.file-drop.has-file{
  border-style:solid;
  border-color:var(--pink);
  background:rgba(233,27,137,0.10);
}
.file-drop-compact{
  padding:12px 10px;
}
.file-drop-icon{
  font-size:22px;
  color:var(--pink);
  margin-bottom:4px;
  line-height:1;
}
.file-drop-compact .file-drop-icon{
  font-size:16px;
  margin-bottom:2px;
}
.file-drop-title{
  font-size:13px;
  font-weight:600;
  color:var(--text);
  margin-bottom:3px;
  word-break:break-all;
}
.file-drop-hint{
  font-size:11px;
  color:var(--text-mute);
}
.field-hint{
  display:block !important;
  font-size:11px;
  color:var(--text-mute);
  margin:6px 0 0 !important;
  font-style:italic;
}
.row{display:flex;gap:8px}
.row .text-field{flex:1;margin-bottom:0}
.row .flex{flex:2}

.toggle{
  display:flex;align-items:center;gap:8px;
  padding:8px 10px;
  background:var(--panel-2);
  border:1px solid var(--line-2);
  border-radius:var(--radius);
  cursor:pointer;
  font-size:13px;
  transition:background .15s,border-color .15s;
}
.toggle:hover{border-color:var(--line-2)}
.toggle input[type=checkbox]{
  width:14px;height:14px;
  accent-color:var(--pink);
  cursor:pointer;
}

/* ---------- SEGMENTED CONTROL ---------- */
.seg{
  display:flex;
  background:var(--panel-2);
  border:1px solid var(--line-2);
  border-radius:var(--radius);
  padding:3px;
  margin-bottom:10px;
}
.seg-btn{
  flex:1;
  background:transparent;
  border:none;
  color:var(--text-mute);
  padding:7px 10px;
  font-family:'Oswald',sans-serif;
  font-size:12px;
  letter-spacing:.08em;
  cursor:pointer;
  border-radius:4px;
  transition:all .15s;
}
.seg-btn:hover{color:var(--text)}
.seg-btn.active{
  background:var(--ink);
  color:#fff;
  box-shadow:inset 0 0 0 1px var(--pink);
}

/* ---------- BUTTONS ---------- */
.btn-primary,.btn-ghost,.btn-record{
  border:none;
  border-radius:var(--radius);
  padding:9px 16px;
  font-family:'Oswald',sans-serif;
  font-size:13px;
  letter-spacing:.06em;
  cursor:pointer;
  transition:all .15s;
}
.btn-primary{
  background:var(--gradient);
  color:#fff;
  font-weight:600;
}
.btn-primary:disabled{opacity:.35;cursor:not-allowed}
.btn-primary:hover:not(:disabled){filter:brightness(1.1)}

.btn-ghost{
  background:var(--panel-2);
  color:var(--text);
  border:1px solid var(--line-2);
}
.btn-ghost:hover{border-color:var(--pink);color:var(--pink)}
.btn-ghost:disabled{opacity:.4;cursor:not-allowed}

.btn-record{
  background:#fff;
  color:var(--ink);
  font-weight:700;
}
.btn-record:disabled{opacity:.35;cursor:not-allowed;background:var(--panel-2);color:var(--text-mute)}
.btn-record:hover:not(:disabled){background:var(--pink);color:#fff}
.btn-record.recording{
  background:var(--pink);color:#fff;
  animation:pulse 1.2s infinite;
}
@keyframes pulse{
  0%,100%{box-shadow:0 0 0 0 rgba(233,27,137,.6)}
  50%{box-shadow:0 0 0 8px rgba(233,27,137,0)}
}

/* ---------- STAGE ---------- */
.stage-wrap{
  flex:1;
  display:grid;place-items:center;
  background:#000;
  border-radius:6px;
  position:relative;
  overflow:hidden;
  min-height:0;
}
#canvas{
  max-width:100%;
  max-height:100%;
  width:auto;
  height:auto;
  background:#000;
  display:block;
}
.stage-empty{
  position:absolute;inset:0;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;
  pointer-events:none;
  color:var(--text-mute);
}
.stage-empty.hidden{display:none}
.stage-empty a{color:var(--pink);pointer-events:auto}
.empty-eyebrow{
  font-family:'Oswald',sans-serif;
  letter-spacing:.32em;
  font-size:11px;
  color:var(--pink);
  margin:0;
}
.empty-title{font-size:15px;margin:6px 0 4px;color:var(--text)}
.empty-sub{font-size:12px;margin:0}

/* ---------- TRANSPORT ---------- */
.transport{
  display:flex;align-items:center;gap:10px;
  padding:10px 14px;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
}
.transport .grow{flex:1}
.time{
  font-family:'JetBrains Mono','Consolas',monospace;
  color:var(--text-mute);
  font-size:13px;
  letter-spacing:.04em;
}

.export-bar{
  display:flex;align-items:center;gap:12px;
  padding:10px 14px;
  background:var(--panel-2);
  border:1px solid var(--pink);
  border-radius:var(--radius);
}
.export-status{font-size:12px;color:var(--text)}
#exportProgress{flex:1;height:6px}
#exportProgress::-webkit-progress-bar{background:var(--ink);border-radius:3px}
#exportProgress::-webkit-progress-value{background:var(--gradient);border-radius:3px}

/* ---------- FOOTER ---------- */
.footer{
  border-top:1px solid var(--line);
  background:var(--ink);
  padding:18px 24px;
}
.footer-inner{
  display:flex;align-items:center;justify-content:space-between;
  max-width:1400px;margin:0 auto;
  color:var(--text-mute);font-size:12px;
}
.footer-inner nav{display:flex;gap:18px}
.footer-inner a{color:var(--text-mute);text-decoration:none}
.footer-inner a:hover{color:var(--text)}

/* ---------- STATIC PAGES (usage/about/etc) ---------- */
.page{max-width:760px;margin:40px auto;padding:0 24px}
.page h1{
  font-family:'Oswald',sans-serif;
  font-size:32px;font-weight:600;
  letter-spacing:.04em;
  margin:0 0 8px;
  background:var(--gradient);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
}
.page .lead{color:var(--text-mute);font-size:15px;margin:0 0 32px}
.page h2{
  font-family:'Oswald',sans-serif;
  font-size:14px;font-weight:600;letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--pink);
  margin:36px 0 12px;
  padding-bottom:8px;
  border-bottom:1px solid var(--line-2);
}
.page h3{font-size:15px;font-weight:600;margin:20px 0 8px;color:var(--text)}
.page p,.page li{color:var(--text);font-size:14px;line-height:1.75}
.page ol,.page ul{padding-left:1.4em}
.page code{
  background:var(--panel-2);
  border:1px solid var(--line-2);
  padding:2px 6px;border-radius:4px;
  font-family:'JetBrains Mono','Consolas',monospace;
  font-size:12px;
}
.page .steps{
  list-style:none;padding:0;
  counter-reset:step;
}
.page .steps > li{
  counter-increment:step;
  position:relative;
  padding:12px 12px 12px 48px;
  background:var(--panel);
  border:1px solid var(--line-2);
  border-radius:var(--radius);
  margin-bottom:10px;
}
.page .steps > li::before{
  content:counter(step);
  position:absolute;left:14px;top:12px;
  width:24px;height:24px;
  display:grid;place-items:center;
  background:var(--gradient);color:#fff;
  font-family:'Oswald',sans-serif;font-size:12px;font-weight:600;
  border-radius:50%;
}
.page .callout{
  margin:20px 0;
  padding:12px 14px;
  background:var(--panel);
  border-left:3px solid var(--pink);
  border-radius:4px;
  font-size:13px;
}

/* ---------- 404 ---------- */
.notfound{
  flex:1;display:grid;place-items:center;text-align:center;padding:60px 24px;
}
.notfound h1{
  font-family:'Oswald',sans-serif;
  font-size:80px;margin:0;
  background:var(--gradient);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
}
.notfound a{color:var(--pink)}

/* ---------- RESPONSIVE ---------- */
@media (max-width:900px){
  .studio{grid-template-columns:1fr}
  .panel{
    max-height:none;
    border-right:none;
    border-bottom:1px solid var(--line);
  }
  .stage{padding:14px}
  .footer-inner{flex-direction:column;gap:10px;align-items:flex-start}
}