:root {
  color-scheme: light;
  --bg: #f3f0e7;
  --panel: rgba(255, 255, 255, 0.92);
  --panel-border: rgba(19, 33, 45, 0.12);
  --ink: #1b2d3a;
  --muted: #667481;
  --accent: #2d6f77;
  --shadow: 0 24px 60px rgba(19, 33, 45, 0.12);
  --radius: 22px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(45, 111, 119, 0.15), transparent 28%),
    linear-gradient(180deg, #faf8f2 0%, var(--bg) 100%);
}

button,
input {
  font: inherit;
}

.page-shell {
  width: min(1140px, calc(100vw - 28px));
  margin: 0 auto;
  padding: 34px 0 56px;
}

.hero {
  margin-bottom: 22px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  letter-spacing: 0.18em;
  font-weight: 700;
  font-size: 0.8rem;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.1rem);
  line-height: 1.05;
}

.hero-copy,
.panel-copy,
.helper-copy {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.55;
}

.layout-grid,
.summary-grid {
  display: grid;
  gap: 18px;
}

.layout-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.summary-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 20px 0;
}

.panel,
.summary-card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.panel {
  padding: 22px;
}

.panel h2 {
  margin: 0 0 12px;
  font-size: 1.05rem;
}

.field-grid {
  display: grid;
  gap: 14px;
}

.two-col {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.field-full {
  grid-column: 1 / -1;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.field span {
  font-size: 0.92rem;
  color: var(--muted);
}

.field input {
  min-height: 48px;
  width: 100%;
  padding: 0 14px;
  border: 1px solid rgba(19, 33, 45, 0.14);
  border-radius: 14px;
  background: #fff;
  color: var(--ink);
}

.field input:focus {
  outline: 2px solid rgba(45, 111, 119, 0.24);
  border-color: var(--accent);
}

.check-list {
  display: grid;
  gap: 12px;
}

.check-row {
  display: flex;
  align-items: start;
  gap: 10px;
  color: var(--ink);
  line-height: 1.45;
}

.check-row input {
  margin-top: 3px;
}

.summary-card {
  padding: 20px 22px;
}

.summary-label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.92rem;
}

.summary-card strong {
  font-size: clamp(1.65rem, 4vw, 2.5rem);
}

.panel-visual {
  padding-bottom: 18px;
}

.visual-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.primary-button {
  min-height: 46px;
  padding: 0 18px;
  border: 0;
  border-radius: 14px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}

#viz {
  width: 100%;
  min-height: 380px;
  border-radius: 18px;
  border: 1px solid rgba(19, 33, 45, 0.16);
  background:
    linear-gradient(180deg, rgba(45, 111, 119, 0.05), rgba(45, 111, 119, 0.01)),
    #fff;
}

@media (max-width: 980px) {
  .layout-grid,
  .summary-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .page-shell {
    width: min(100vw - 18px, 1140px);
    padding: 24px 0 36px;
  }

  .panel,
  .summary-card {
    padding: 18px;
    border-radius: 18px;
  }

  .two-col {
    grid-template-columns: 1fr;
  }

  .visual-head {
    flex-direction: column;
  }

  .primary-button {
    width: 100%;
  }
}