:root {
  --bg: #eef3f6;
  --surface: #ffffff;
  --surface-soft: #edf4f8;
  --border: #d3dde5;
  --text: #182028;
  --muted: #556270;
  --accent: #3d6a84;
  --accent-soft: #dfeaf1;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Helvetica Neue", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top right, #f8fbfd 0%, #edf3f7 48%, #e7eef3 100%);
}

.page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 28px 18px 40px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 10px 26px rgba(37, 59, 79, 0.06);
  padding: 20px;
}

.hero,
.preview-grid,
.history-grid {
  display: grid;
  gap: 18px;
}

.hero {
  grid-template-columns: 1.7fr 1fr;
  margin-bottom: 18px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin: 0 0 8px;
  font-size: 0.82rem;
}

.lead,
.muted {
  color: var(--muted);
}

.status-panel {
  padding: 16px;
  border-radius: 14px;
  background: var(--surface-soft);
}

.controls,
.button-row,
.metric-grid,
.canvas-grid {
  display: grid;
  gap: 14px;
}

.controls {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.button-row {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  margin-top: 16px;
}

.preview-grid,
.history-grid {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  margin-top: 18px;
}

.canvas-grid,
.metric-grid {
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

label {
  display: grid;
  gap: 8px;
  color: var(--muted);
}

input,
select,
button {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 11px 12px;
  font: inherit;
  background: #fff;
}

button {
  cursor: pointer;
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

button:disabled {
  cursor: default;
  background: #90a7b7;
  border-color: #90a7b7;
}

figure {
  margin: 0;
  background: var(--accent-soft);
  padding: 12px;
  border-radius: 14px;
}

canvas {
  width: 100%;
  height: auto;
  image-rendering: pixelated;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fff;
}

.metric-card {
  background: var(--surface-soft);
  border-radius: 14px;
  padding: 12px;
}

.metric-card span {
  display: block;
  color: var(--muted);
  font-size: 0.84rem;
  margin-bottom: 6px;
}

.plain-list {
  margin: 0;
  padding-left: 18px;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  text-align: left;
  padding: 10px 8px;
  border-bottom: 1px solid var(--border);
  font-size: 0.94rem;
}

@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
  }
}