:root {
  --bg: #F8FAFC;
  --surface: #ffffff;
  --primary: #4F46E5;
  --secondary: #7C3AED;
  --text-main: #0F172A;
  --text-muted: #64748B;
  --success: #10B981;
  --border: #E2E8F0;
  --radius-lg: 12px;
  --radius-md: 8px;
  --shadow-soft: 0 4px 20px -2px rgba(79, 70, 229, 0.10);
  --shadow-hover: 0 10px 25px -5px rgba(79, 70, 229, 0.15), 0 8px 10px -6px rgba(79, 70, 229, 0.10);
  --btn-shadow: 0 4px 14px 0 rgba(79, 70, 229, 0.30);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  padding: 40px 20px;
  font-family: "Plus Jakarta Sans", Inter, system-ui, sans-serif;
  color: var(--text-main);
  background: radial-gradient(circle at 20% 15%, rgba(79, 70, 229, 0.08), transparent 45%),
              radial-gradient(circle at 85% 10%, rgba(124, 58, 237, 0.08), transparent 40%),
              var(--bg);
  position: relative;
  overflow-x: hidden;
}

body::before,
body::after {
  content: "";
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  filter: blur(110px);
  opacity: 0.32;
  pointer-events: none;
  z-index: 0;
}

body::before { background: linear-gradient(135deg, rgba(79,70,229,0.45), rgba(124,58,237,0.20)); top: -200px; left: -170px; }
body::after { background: linear-gradient(120deg, rgba(124,58,237,0.40), rgba(79,70,229,0.22)); bottom: -220px; right: -190px; }

h1 {
  margin: 0 0 18px;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 3px rgba(79, 70, 229, 0.18);
  position: relative;
  z-index: 1;
}

.layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(320px, 1.7fr) minmax(300px, 1fr);
  gap: 20px;
  align-items: start;
}

.u-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-soft);
  transition: box-shadow 0.24s ease;
  transform: none;
  position: relative;
}

.u-card:hover {
  box-shadow: var(--shadow-soft);
  transform: none;
}

.u-row {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

input, select, button, textarea {
  font: inherit;
  border-radius: var(--radius-md);
}

input,
select,
textarea {
  border: 1px solid var(--border);
  padding: 0.65rem 0.8rem;
  background: #fff;
  color: var(--text-main);
  width: 100%;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.22);
}

.image-area {
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: #f8fbff;
  min-height: 360px;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

.image-area img {
  max-width: 100%;
  max-height: 100%;
  border-radius: var(--radius-lg);
  transform: translateZ(0);
}

.picker {
  position: absolute;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 3px solid rgba(255,255,255,0.95);
  box-shadow: 0 2px 18px rgba(79, 70, 229, 0.55);
  pointer-events: none;
  transform: translate(-50%, -50%);
  display: flex;
  justify-content: center;
  align-items: center;
}

.picker::after {
  content: '+';
  color: var(--primary);
  font-weight: 900;
  font-size: 18px;
}

.marker {
  position:absolute;
  width:22px;
  height:22px;
  border-radius:50%;
  border:2px solid #fff;
  box-shadow:0 0 0 2px rgba(79,70,229,0.45);
  transform:translate(-50%,-50%);
  cursor: crosshair;
}

table {
  width:100%;
  border-collapse: collapse;
  margin-top: 6px;
  background: #fff;
  border-radius: 10px;
  overflow: hidden;
}

th, td {
  padding: 8px 10px;
  border-bottom: 1px solid #F1F5F9;
  text-align:left;
  color: var(--text-main);
}

th:nth-child(2), td:nth-child(2) {
  width: 60px;
}

.swatch {
  width: 26px;
  height: 26px;
  border-radius: 999px;
  border: 1px solid var(--border);
  display:inline-block;
}

.underlined {
  border:none;
  border-bottom:1px solid #94A3B8;
  padding: 2px 4px;
  width: 100%;
  background: transparent;
}

.code-box {
  width: 100%;
  min-height: 150px;
  margin-top: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: #f8fafc;
  padding: 12px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  overflow:auto;
  white-space: pre;
  line-height: 1.65;
  font-size: 0.94rem;
}

.hidden { display:none; }

.label-inline {
  font-size:0.9rem;
  margin-right:6px;
  font-weight:600;
  color: var(--text-main);
}

.control-grid {
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:12px;
  align-items:center;
}

.var-type-buttons {
  display: flex;
  gap: 4px;
}

.btn {
  cursor:pointer;
  border-radius: 999px;
  border: 1px solid transparent;
  padding: 8px 16px;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
  color: #fff;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.22);
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 14px -4px rgba(79, 70, 229, 0.30);
}

.btn:active {
  transform: translateY(0);
  box-shadow: 0 4px 10px rgba(79, 70, 229, 0.22);
}

.btn.danger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 70px;
  height: 28px;
  padding: 0 10px;
  font-size: 0.8rem;
  border-radius: 999px;
  border: 1px solid #d1d5db;
  background: #ffffff;
  color: var(--text-main);
  box-shadow: none;
}

.btn.danger:hover,
.btn.danger:focus {
  background: #f8fafc;
  box-shadow: none;
}

.format-btn {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text-main);
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.08);
}

.format-btn.active {
  background: linear-gradient(90deg, #4F46E5, #7C3AED);
  color: #fff;
  border-color: transparent;
}

.var-type-btn {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text-main);
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.08);
}

.var-type-btn.active {
  background: linear-gradient(90deg, #4F46E5, #7C3AED);
  color: #fff;
  border-color: transparent;
}

.topline {
  font-size:0.95rem;
  color: var(--text-muted);
  margin-bottom:6px;
}

@media (max-width: 900px) {
  body { padding: 24px 14px; }
  .layout { grid-template-columns: 1fr; }
  .u-card { transform: none; }
}