:root{--bg:#070b12;--panel:#101620;--border:#263245;--text:#f3f6fb;--muted:#9caab9;--accent:#9fc4e7;--warm:#dbc490;--shadow:0 28px 70px rgba(0,0,0,.42)}
*{box-sizing:border-box}html{min-height:100%;background:#060910}body{margin:0;min-height:100vh;color:var(--text);font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:radial-gradient(circle at 20% 0,#142236 0,transparent 34%),#070b12}
.site-nav{height:62px;display:flex;align-items:center;justify-content:space-between;padding:0 20px;border-bottom:1px solid rgba(255,255,255,.07);background:rgba(7,11,18,.78);backdrop-filter:blur(12px);position:sticky;top:0;z-index:20}.nav-brand{font-weight:800;color:#fff;text-decoration:none}.site-nav nav{display:flex;gap:8px}.site-nav nav a{color:#aab7c8;text-decoration:none;padding:8px 11px;border-radius:999px;border:1px solid rgba(255,255,255,.07)}.site-nav nav a.active,.site-nav nav a:hover{color:#fff;border-color:rgba(159,196,231,.35);background:rgba(159,196,231,.07)}
.app-shell{display:grid;grid-template-columns:minmax(360px,420px) minmax(0,1fr);gap:18px;align-items:start;min-height:calc(100vh - 62px);padding:18px}.sidebar,.workspace{background:linear-gradient(180deg,rgba(16,22,32,.985),rgba(10,15,23,.985));border:1px solid var(--border);border-radius:22px;box-shadow:var(--shadow)}.sidebar{padding:20px}.workspace{padding:18px;min-width:0}.brand-block{padding:4px 2px 18px}.brand-block h1,.topbar h2{margin:0;font-size:23px}.brand-block p,.topbar p,.help,.microcopy{margin:6px 0 0;color:var(--muted);font-size:13px;line-height:1.5}.eyebrow{font-size:10px;font-weight:850;letter-spacing:.16em;color:#a9cce9;display:block;margin-bottom:5px}
.panel-section{padding:16px;margin-bottom:14px;background:rgba(255,255,255,.024);border:1px solid rgba(255,255,255,.065);border-radius:16px}.panel-section.compact{padding:14px 16px}.panel-section h2{margin:0 0 14px;font-size:15px}.section-head{display:flex;align-items:center;justify-content:space-between}.badge{font-size:9px;letter-spacing:.12em;color:#b9ddca;border:1px solid rgba(185,221,202,.28);border-radius:999px;padding:5px 8px}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:12px}.effects-grid,.scene-grid,.preset-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}label{display:grid;gap:8px;color:#e7edf4;font-size:13px;margin-bottom:12px}input[type="text"],input[type="number"],select,button{width:100%;border-radius:12px;border:1px solid #344055;background:#0a1019;color:#f4f7fb;padding:10px 12px;font-size:13px}input:focus,select:focus{outline:2px solid rgba(159,196,231,.2);border-color:#607d9b}button{cursor:pointer;transition:.2s ease}button:hover{transform:translateY(-1px);border-color:#52677f}button.active{background:rgba(159,196,231,.12);border-color:rgba(159,196,231,.46)}button.primary{background:linear-gradient(135deg,#b3d1eb,#d8c28b);color:#10151d;border-color:transparent;font-weight:850}
input[type="range"]{width:100%;appearance:none;height:6px;border-radius:999px;background:#263246}input[type="range"]::-webkit-slider-thumb{appearance:none;width:18px;height:18px;border-radius:50%;background:linear-gradient(135deg,#b3d1eb,#d8c28b);border:2px solid #fff}.inline-check{display:flex;align-items:center;gap:9px;background:#0b111a;border:1px solid #2a3445;padding:10px 11px;border-radius:12px;margin-bottom:0}.inline-check input{width:16px;height:16px}.file-upload{background:#0b111a;border:1px dashed #43536a;border-radius:13px;padding:12px}.file-upload input{max-width:100%;font-size:12px;color:var(--muted)}
.actions{display:grid;grid-template-columns:1fr 1fr;gap:10px}.status{min-height:42px;background:#0c131d;border:1px solid #29394b;border-radius:12px;padding:10px 12px;color:#e7f0f8;font-size:13px;display:flex;align-items:center}.topbar{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:14px}.pill-row{display:flex;gap:8px;flex-wrap:wrap}.pill{padding:8px 12px;border-radius:999px;border:1px solid rgba(255,255,255,.09);background:rgba(255,255,255,.035);font-size:12px;color:#d9e3ee}.loop-pill{color:#b9ddca;border-color:rgba(185,221,202,.25)}.canvas-wrap{display:grid;place-items:center;min-height:360px;padding:20px;border-radius:18px;border:1px solid rgba(255,255,255,.06);background:radial-gradient(circle at top,rgba(130,165,210,.07),transparent 38%),rgba(255,255,255,.01)}canvas{display:block;width:100%;height:auto;max-width:100%;border-radius:18px;background:#07101c;box-shadow:0 24px 56px rgba(0,0,0,.5)}
@media(min-width:1220px){.workspace{position:sticky;top:80px}}@media(max-width:1219px){.app-shell{grid-template-columns:1fr}.workspace{position:static}}@media(max-width:650px){.app-shell{padding:10px}.sidebar,.workspace{border-radius:14px}.two-col,.actions,.scene-grid,.preset-grid,.effects-grid{grid-template-columns:1fr}}
.unique-row{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:10px;color:var(--muted);font-size:12px}
.mini-btn{width:auto;padding:6px 9px;font-size:11px;border-radius:9px}
.batch-status{margin-top:10px;padding:9px 11px;border-radius:10px;background:rgba(255,255,255,.035);border:1px solid rgba(255,255,255,.07);color:var(--muted);font-size:12px;line-height:1.4}


/* Desktop viewport layout: only the left control rail scrolls. */
html,body{
  height:100%;
  min-height:0;
  overflow:hidden;
}
body{
  overscroll-behavior:none;
}
.site-nav{
  position:relative;
  top:auto;
  flex:0 0 62px;
}
.app-shell{
  height:calc(100vh - 62px);
  min-height:0;
  align-items:stretch;
  overflow:hidden;
  padding:18px;
}
.sidebar{
  height:100%;
  min-height:0;
  overflow-y:auto;
  overflow-x:hidden;
  overscroll-behavior:contain;
  scrollbar-gutter:stable;
  padding:24px 26px 30px 24px;
}
.workspace{
  height:100%;
  min-height:0;
  overflow:hidden;
  padding:20px;
  display:flex;
  flex-direction:column;
  position:static;
}
.topbar{
  flex:0 0 auto;
  padding:2px 2px 0;
}
.canvas-wrap{
  flex:1 1 auto;
  min-height:0;
  height:auto;
  overflow:hidden;
  padding:22px;
}
.canvas-wrap canvas{
  width:auto;
  height:auto;
  max-width:100%;
  max-height:100%;
}

/* Keep every control comfortably away from card borders. */
.panel-section{
  padding:20px;
  margin-bottom:16px;
}
.panel-section.compact{
  padding:18px 20px;
}
.panel-section:last-child{
  margin-bottom:0;
}
.file-upload{
  padding:14px 15px;
}
.status,
.batch-status{
  padding:12px 14px;
}
.actions{
  gap:12px;
}
.two-col{
  gap:14px;
}
.effects-grid,
.scene-grid,
.preset-grid{
  gap:10px;
}
.inline-check{
  padding:11px 13px;
}

/* Scrollbar belongs to the left rail, not the browser viewport. */
.sidebar{
  scrollbar-width:thin;
  scrollbar-color:#8fb7d8 rgba(143,183,216,.10);
}
.sidebar::-webkit-scrollbar{
  width:10px;
}
.sidebar::-webkit-scrollbar-track{
  background:rgba(143,183,216,.10);
  border-radius:999px;
  margin:10px 0;
}
.sidebar::-webkit-scrollbar-thumb{
  background:#8fb7d8;
  border-radius:999px;
  border:2px solid transparent;
  background-clip:padding-box;
}
.sidebar::-webkit-scrollbar-thumb:hover{
  filter:brightness(1.12);
}

/* Smaller screens still keep scrolling inside the control rail. */
@media(max-width:1219px){
  .app-shell{
    grid-template-columns:minmax(330px,42%) minmax(0,1fr);
    height:calc(100vh - 62px);
    overflow:hidden;
  }
  .workspace{
    position:static;
  }
}
@media(max-width:760px){
  .app-shell{
    grid-template-columns:1fr;
    padding:10px;
  }
  .workspace{
    display:none;
  }
  .sidebar{
    padding:18px 20px 24px 18px;
  }
}


/* Polished dropdown controls: custom chevron with safe inset from the border. */
.two-col{
  grid-template-columns:repeat(2,minmax(0,1fr));
}
.two-col > label,
.panel-section label{
  min-width:0;
}
select{
  -webkit-appearance:none;
  appearance:none;
  min-height:48px;
  padding:11px 50px 11px 14px;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' viewBox='0 0 18 18' fill='none'%3E%3Cpath d='M4.5 6.75L9 11.25L13.5 6.75' stroke='%23DCE7F2' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position:right 17px center;
  background-size:18px 18px;
  cursor:pointer;
  line-height:1.25;
  text-overflow:ellipsis;
}
select:hover{
  border-color:#526983;
}
select:focus{
  background-position:right 17px center;
}
select::-ms-expand{
  display:none;
}
@media(max-width:980px){
  select{
    padding-right:46px;
    background-position:right 15px center;
  }
}