:root{
  color-scheme: light;
  --bg: #f6f7fb;
  --card: rgba(15,23,42,0.03);
  --card2: rgba(15,23,42,0.05);
  --text: rgba(15,23,42,0.92);
  --muted: rgba(15,23,42,0.68);
  --border: rgba(15,23,42,0.12);
  --shadow: 0 12px 40px rgba(2,6,23,0.12);
  --radius: 14px;
  --accent: #2563eb;
  --focus: 0 0 0 4px rgba(37,99,235,0.35);
}

*{box-sizing:border-box}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background: radial-gradient(1200px 700px at 20% -10%, rgba(37,99,235,0.14), transparent 55%),
              radial-gradient(900px 600px at 110% 10%, rgba(16,185,129,0.10), transparent 55%),
              var(--bg);
  color: var(--text);
}

.wrap{max-width: 1180px; margin: 0 auto; padding: 18px 18px 32px;}

.skip-link{
  position:absolute;
  top:-48px;
  left:12px;
  padding:10px 12px;
  background: var(--card2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  text-decoration: none;
}
.skip-link:focus{top:12px; outline:none; box-shadow: var(--focus);}

.app-header{
  position: sticky;
  top: 0;
  backdrop-filter: blur(10px);
  background: color-mix(in oklab, var(--bg) 86%, transparent);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}

.header-inner{display:flex; align-items:center; justify-content:space-between; gap:16px;}
.brand{display:flex; align-items:center; gap:12px; min-width: 0;}
.brand-logo{
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--card2) 90%, transparent);
  object-fit: cover;
}
.title{font-size: 22px; margin: 0 0 4px;}
.subtitle{margin:0; color: var(--muted); font-size: 13px;}
.header-actions{display:flex; gap:10px; align-items:center;}

.layout{display:grid; grid-template-columns: 1fr 1.1fr; gap: 16px; align-items:start;}
@media (max-width: 980px){ .layout{grid-template-columns: 1fr; } .app-header{position:static;} }

.right-col{
  display:flex;
  flex-direction:column;
  gap: 16px;
  min-width: 0;
}

.panel{
  background: linear-gradient(180deg, var(--card), transparent 180%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.panel-head{padding: 16px 16px 10px; border-bottom: 1px solid var(--border);}
.panel-head h2{margin:0; font-size: 16px;}
.panel-hint{margin: 6px 0 0; color: var(--muted); font-size: 12.5px;}

.form{padding: 14px 16px 16px;}
.grid{display:grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px;}
@media (max-width: 580px){ .grid{grid-template-columns: 1fr;} }
.span-2{grid-column: span 2;}
@media (max-width: 580px){ .span-2{grid-column: auto;} }

.field{display:flex; flex-direction:column; gap:6px;}
.label{font-size: 12.5px; color: var(--muted);}
.help{font-size: 12px; color: var(--muted); line-height: 1.3;}

.hint{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width: 18px;
  height: 18px;
  margin-left: 6px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  cursor: help;
  user-select: none;
  vertical-align: middle;
  position: relative;
  top: -1px;
}
.hint:focus{outline:none; box-shadow: var(--focus); color: var(--text);}
.hint:hover{color: var(--text);}

/* Tooltips are rendered in a fixed overlay so they never get clipped by panels. */
.tooltip{
  position: fixed;
  z-index: 100;
  width: min(360px, calc(100vw - 24px));
  padding: 10px 10px;
  border-radius: 12px;
  background: color-mix(in oklab, var(--bg) 86%, black);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  color: var(--text);
  font-size: 12.5px;
  line-height: 1.25;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 120ms ease, transform 120ms ease;
  pointer-events: none;
}
.tooltip.show{
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.tooltip .tooltip-arrow{
  position:absolute;
  width: 10px;
  height: 10px;
  background: color-mix(in oklab, var(--bg) 86%, black);
  border-left: 1px solid var(--border);
  border-top: 1px solid var(--border);
  rotate: 45deg;
}
.tooltip[data-placement="bottom"] .tooltip-arrow{
  top: -6px;
}
.tooltip[data-placement="top"] .tooltip-arrow{
  bottom: -6px;
  rotate: 225deg;
}

input, select, textarea{
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--card2) 92%, transparent);
  color: var(--text);
  padding: 10px 10px;
  font: inherit;
  outline: none;
}
input[type="checkbox"]{
  width:auto;
  padding:0;
  border-radius: 6px;
  background: transparent;
  accent-color: var(--accent);
}
.checkrow{
  display:flex;
  align-items:center;
  gap:10px;
  padding: 10px 10px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--card2) 92%, transparent);
}
.checktext{font-size: 13px; color: var(--text);}

.exportrow{
  display:flex;
  flex-wrap:wrap;
  gap: 10px;
  align-items:center;
}
.exportrow .btn{
  flex: 1 1 240px;
  display:flex;
  align-items:center;
  justify-content:center;
  gap: 6px;
}
input:focus, select:focus, textarea:focus{box-shadow: var(--focus); border-color: color-mix(in oklab, var(--accent) 65%, var(--border));}
input[type="color"]{padding:0; height: 42px; cursor:pointer;}
input[type="file"]{padding: 8px 10px; cursor:pointer;}

.divider{height:1px; margin: 14px 0; background: var(--border);}

.btn{
  border: 1px solid color-mix(in oklab, var(--accent) 40%, var(--border));
  background: linear-gradient(180deg, color-mix(in oklab, var(--accent) 25%, var(--card2)), color-mix(in oklab, var(--accent) 10%, var(--card2)));
  color: var(--text);
  padding: 10px 12px;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 650;
}
.btn:hover{filter: brightness(1.06);}
.btn:active{transform: translateY(1px);}
.btn:focus{outline:none; box-shadow: var(--focus);}
.btn-secondary{border-color: var(--border); background: color-mix(in oklab, var(--card2) 90%, transparent);}
.btn-ghost{border-color: var(--border); background: transparent;}

.design-grid{
  padding: 14px 16px;
  display:grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 10px;
}
@media (max-width: 980px){ .design-grid{grid-template-columns: repeat(2, minmax(0,1fr));} }
@media (max-width: 520px){ .design-grid{grid-template-columns: 1fr;} }

.design-card{
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--card2) 82%, transparent);
  border-radius: 14px;
  padding: 12px;
  text-align: left;
  display:flex;
  flex-direction:column;
  gap: 8px;
  min-height: 86px;
  cursor: pointer;
}
.design-card:hover{border-color: color-mix(in oklab, var(--accent) 45%, var(--border));}
.design-card[data-selected="true"]{
  border-color: color-mix(in oklab, var(--accent) 70%, var(--border));
  background: linear-gradient(180deg, color-mix(in oklab, var(--accent) 18%, var(--card2)), color-mix(in oklab, var(--accent) 6%, var(--card2)));
}
.design-name{font-weight: 850; font-size: 13.5px; letter-spacing: 0.01em;}
.design-desc{margin:4px 0 0; color: var(--muted); font-size: 12.5px; line-height: 1.35;}
.design-card:focus{outline:none; box-shadow: var(--focus);}

.preview-head{display:flex; align-items:center; justify-content:space-between; gap: 10px; flex-wrap:wrap;}
.preview-head h2{flex: 1 1 140px;}
.preview-actions{display:flex; flex-wrap:wrap; gap: 8px; justify-content:flex-end;}

.preview-shell{padding: 14px 16px 16px;}
.notice{
  margin: 10px 16px 16px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--card2) 90%, transparent);
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.35;
}
.notice strong{color: var(--text);}
.notice:empty{display:none;}
.preview{
  background: white;
  color: #111827;
  border-radius: 14px;
  border: 1px solid rgba(0,0,0,0.10);
  padding: 14px;
  overflow:auto;
  min-height: 160px;
}

.tips{padding: 0 16px 16px;}
.tips summary{cursor:pointer; color: var(--muted); font-weight: 650;}
.tips ul{margin: 10px 0 0; color: var(--muted); font-size: 12.5px; line-height: 1.35;}
.tips strong{color: var(--text);}

.output{padding: 0 16px 16px;}
.output-head{display:flex; align-items:center; justify-content:space-between; gap: 10px;}
.output h3{margin:0; font-size: 14px;}
.output-area{
  margin-top: 10px;
  min-height: 160px;
  resize: vertical;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 12.5px;
  line-height: 1.35;
}

.footer{
  margin-top: 14px;
  padding: 14px 0 18px;
  border-top: 1px solid var(--border);
}
.footer-inner{
  display:grid;
  grid-template-columns: 1.1fr 1.4fr 1fr;
  gap: 12px;
  align-items:start;
}
@media (max-width: 820px){
  .footer-inner{grid-template-columns: 1fr; gap: 10px;}
}
.footer-col{
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--card2) 90%, transparent);
  border-radius: 14px;
  padding: 12px;
  min-width: 0;
}
.footer-title{font-size: 12px; font-weight: 850; letter-spacing: 0.01em; margin: 0 0 8px;}
.footer p{margin:0; color: var(--muted); font-size: 12.5px; line-height: 1.45;}
.footer-nav{
  display:flex;
  flex-wrap:wrap;
  gap: 8px;
  align-items:center;
}
.footer-nav a{
  color: var(--text);
  text-decoration:none;
  border: 1px solid var(--border);
  background: white;
  padding: 6px 10px;
  border-radius: 999px;
}
.footer-nav a:hover{border-color: color-mix(in oklab, var(--accent) 55%, var(--border));}
.footer-meta-row{
  display:flex;
  flex-wrap:wrap;
  gap: 8px;
  align-items:center;
  color: var(--muted);
  font-size: 12.5px;
}
.footer-meta-row #versionInfo{
  display:inline;
  min-width: 0;
  overflow-wrap: anywhere;
}
.footer-meta-row a{
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.footer-meta-row a:hover{
  border-bottom-color: color-mix(in oklab, var(--accent) 55%, var(--border));
}
.footer-chip{
  display:inline-flex;
  align-items:center;
  gap: 6px;
  border: 1px solid var(--border);
  background: white;
  padding: 6px 10px;
  border-radius: 999px;
}

.pwa-muted{color: var(--muted);}
.pwa-link{
  color: var(--text);
  text-decoration:none;
  border: 1px solid color-mix(in oklab, var(--accent) 40%, var(--border));
  background: color-mix(in oklab, var(--accent) 12%, var(--card2));
  padding: 5px 10px;
  border-radius: 999px;
  font-weight: 750;
}
.pwa-link:hover{filter: brightness(1.06);}

.toast{
  position: fixed;
  right: 16px;
  bottom: 16px;
  background: color-mix(in oklab, var(--bg) 84%, black);
  border: 1px solid var(--border);
  padding: 10px 12px;
  border-radius: 14px;
  box-shadow: var(--shadow);
  max-width: 360px;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 160ms ease, transform 160ms ease;
  pointer-events: none;
}
.toast.show{opacity: 1; transform: translateY(0);}

.modal{
  position: fixed;
  inset: 0;
  z-index: 50;
}
.modal[hidden]{display:none;}
.modal-backdrop{
  position:absolute;
  inset:0;
  background: rgba(0,0,0,0.48);
}
.modal-card{
  position: relative;
  width: min(860px, calc(100vw - 24px));
  max-height: calc(100vh - 24px);
  margin: 12px auto;
  background: color-mix(in oklab, var(--bg) 92%, black);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  display:flex;
  flex-direction:column;
  overflow: hidden;
}
.modal-head{
  padding: 14px 14px;
  border-bottom: 1px solid var(--border);
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap: 10px;
}
.modal-title{font-weight: 850; font-size: 14px;}
.modal-subtitle{color: var(--muted); font-size: 12.5px; margin-top: 2px;}
.modal-body{padding: 14px; overflow:auto;}
.modal-preview{
  background: white;
  border-radius: 14px;
  border: 1px solid rgba(0,0,0,0.10);
  padding: 14px;
  color: #111827;
}
.modal-foot{
  padding: 12px 14px;
  border-top: 1px solid var(--border);
  display:flex;
  justify-content:flex-end;
}