:root{
  --bg: #0b0d12;
  --text: #e9ecf3;
  --muted: #a9b1c6;
  --border: rgba(255,255,255,0.10);
  --shadow: 0 18px 40px rgba(0,0,0,.45);
}

*{ box-sizing: border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  background: radial-gradient(1000px 600px at 20% -10%, rgba(43,103,246,.25), transparent 60%),
              radial-gradient(900px 500px at 90% 0%, rgba(0, 255, 194, .08), transparent 55%),
              var(--bg);
  color: var(--text);
}

.page{ max-width: 1200px; margin: 0 auto; padding: 18px; }

.header{
  display:flex; justify-content: space-between; align-items: flex-start; gap: 16px;
  padding: 18px 18px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.03));
  box-shadow: var(--shadow);
}

h1{ margin: 0 0 6px 0; font-size: 20px; letter-spacing: 0.2px; }
.sub{ margin: 0; color: var(--muted); font-size: 13px; line-height: 1.35; }

.header-actions{ display:flex; gap: 10px; flex-wrap: wrap; justify-content: flex-end; }

.main{ margin-top: 14px; display:grid; grid-template-columns: 420px 1fr; gap: 14px; }
@media (max-width: 980px){ .main{ grid-template-columns: 1fr; } }

.panel, .canvas{
  border: 1px solid var(--border);
  border-radius: 18px;
  background: rgba(18,22,37,0.78);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.panel{ padding: 14px; }

.panel-head{
  display:flex; justify-content: space-between; align-items: center; gap: 10px;
  margin-bottom: 10px;
}

h2{ margin:0; font-size: 15px; letter-spacing: 0.2px; }

.unit-toggle{ display:flex; gap: 8px; }

.chip{
  border:1px solid var(--border);
  border-radius: 999px;
  padding: 6px 10px;
  background: rgba(255,255,255,0.04);
  display:flex;
  align-items:center;
  gap: 8px;
  cursor: pointer;
  user-select:none;
}
.chip input{ margin:0; }
.chip span{ font-size: 12px; color: var(--text); opacity: .9; }

.grid{ display:grid; grid-template-columns: 1fr 1fr; gap: 10px; }

.field{ display:flex; flex-direction: column; gap: 6px; }
.field.inline{ min-width: 0; }

label{ font-size: 12px; color: var(--muted); }

input[type="number"]{
  width: 100%;
  padding: 10px 10px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(0,0,0,0.20);
  color: var(--text);
  outline: none;
}
input[type="number"]:focus{
  border-color: rgba(43,103,246,.55);
  box-shadow: 0 0 0 4px rgba(43,103,246,.14);
}

.hint{ font-size: 11px; color: var(--muted); opacity: 0.85; line-height: 1.2; }

.options{
  margin-top: 12px;
  display:flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: flex-end;
}

.check{
  display:flex; align-items:center; gap: 8px;
  cursor:pointer; user-select:none;
  padding: 10px 10px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
}
.check span{ font-size: 12px; color: var(--text); opacity: .9; }

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

.footer-row{ display:flex; justify-content: space-between; align-items:center; gap: 12px; }
.status{ font-size: 12px; color: var(--muted); min-height: 18px; }

.btn{
  border: 1px solid rgba(43,103,246,0.55);
  background: rgba(43,103,246,0.18);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 12px;
  cursor: pointer;
  font-size: 12px;
  letter-spacing: 0.2px;
}
.btn:hover{ background: rgba(43,103,246,0.26); }
.btn:active{ transform: translateY(1px); }

.btn-ghost{ border-color: var(--border); background: rgba(255,255,255,0.04); }
.btn-ghost:hover{ background: rgba(255,255,255,0.06); }

.btn[aria-pressed="true"]{
  border-color: rgba(0,255,194,0.55);
  background: rgba(0,255,194,0.12);
}

.canvas{ display:flex; flex-direction: column; background: rgba(15,19,32,0.78); }

.canvas-head{
  padding: 14px 14px 10px 14px;
  border-bottom: 1px solid var(--border);
  display:flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.tools{ display:flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; align-items:center; }

.select{
  display:flex;
  align-items:center;
  gap: 8px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.04);
  border-radius: 12px;
}
.select span{ font-size: 12px; color: var(--muted); }
.select select{
  border: 1px solid var(--border);
  background: rgba(0,0,0,0.20);
  color: var(--text);
  border-radius: 10px;
  padding: 6px 8px;
  outline: none;
  font-size: 12px;
}

.workspace{ position: relative; min-height: 620px; }
.svg-wrap{ height: 620px; padding: 0; cursor: grab; }
.svg-wrap.dragging{ cursor: grabbing; }
.svg-wrap.editing{ cursor: default; }
.svg-wrap.measuring{ cursor: crosshair; }

.hud{
  position:absolute;
  left: 12px;
  top: 12px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(0,0,0,0.25);
  backdrop-filter: blur(8px);
  max-width: calc(100% - 24px);
  pointer-events: none;
}
.hud-row{
  display:flex;
  gap: 16px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}
.hud .k{ color: rgba(233,236,243,0.9); margin-right: 6px; }

.legend{
  padding: 10px 14px 14px 14px;
  border-top: 1px solid var(--border);
  display:flex;
  gap: 16px;
  color: var(--muted);
  font-size: 12px;
  flex-wrap: wrap;
}

.swatch{ display:inline-block; width: 14px; height: 3px; margin-right: 8px; vertical-align: middle; border-radius: 999px; }
.swatch-outline{ background: rgba(233,236,243,0.95); }
.swatch-seam{ background: rgba(0, 255, 194, 0.75); }
.swatch-guide{ background: rgba(169,177,198,0.75); }
.swatch-handle{ background: rgba(43,103,246,0.9); }
.swatch-body{ background: rgba(255,255,255,0.22); }

@media print{
  body{ background: white; color: black; }
  .header, .panel, .legend, .canvas-head, .hud{ display:none !important; }
  .page, .main, .canvas, .svg-wrap{ padding:0; margin:0; border:0; box-shadow:none; }
  .svg-wrap{ height:auto; }
}