:root {
  color: #18212f;
  background: #eef3f0;
  font-family:
    "Inter", "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background:
    radial-gradient(circle at 20% 12%, rgba(43, 124, 105, 0.18), transparent 30%),
    linear-gradient(145deg, #f7faf7 0%, #edf3f0 54%, #e5ece7 100%);
}

button,
input {
  font: inherit;
}

.shell {
  width: min(1180px, calc(100vw - 40px));
  margin: 0 auto;
  padding: 42px 0;
}

.hero {
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 12px;
  color: #247463;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
}

h1 {
  max-width: 780px;
  font-size: clamp(36px, 6vw, 76px);
  line-height: 0.96;
  letter-spacing: -0.06em;
}

h2 {
  font-size: 22px;
}

.lead {
  max-width: 720px;
  margin: 18px 0 0;
  color: #5a6878;
  font-size: 17px;
  line-height: 1.8;
}

.grid,
.dashboard {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.card {
  padding: 24px;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(211, 222, 218, 0.9);
  border-radius: 22px;
  box-shadow: 0 24px 70px rgba(20, 45, 38, 0.09);
}

.span-2 {
  grid-column: span 2;
}

.form {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.form.inline {
  grid-template-columns: 110px 160px 1fr auto;
  align-items: end;
}

label {
  display: grid;
  gap: 7px;
  color: #405062;
  font-size: 14px;
}

input {
  height: 42px;
  padding: 0 12px;
  color: #111827;
  background: #ffffff;
  border: 1px solid #cbd8d2;
  border-radius: 12px;
}

input:focus {
  border-color: #247463;
  outline: 3px solid rgba(36, 116, 99, 0.14);
}

button {
  min-height: 42px;
  padding: 0 18px;
  color: #ffffff;
  background: #247463;
  border: 0;
  border-radius: 12px;
  cursor: pointer;
}

button:hover {
  background: #1b5f51;
}

.message {
  min-height: 24px;
  color: #247463;
  line-height: 1.6;
}

.output,
.code {
  overflow: auto;
  margin: 16px 0 0;
  padding: 16px;
  color: #d9f6ec;
  background: #15221f;
  border-radius: 16px;
  line-height: 1.7;
  white-space: pre-wrap;
}

.stats {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
  margin: 18px 0;
}

.stat {
  padding: 14px;
  background: #edf6f2;
  border: 1px solid #d5e7de;
  border-radius: 14px;
}

.stat strong {
  display: block;
  font-size: 24px;
}

.stat span {
  color: #64748b;
  font-size: 13px;
}

.table {
  overflow: auto;
  margin-top: 16px;
}

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

th,
td {
  padding: 10px 8px;
  border-bottom: 1px solid #e1e9e5;
  text-align: left;
  white-space: nowrap;
}

th {
  color: #64748b;
  font-size: 13px;
}

.hidden {
  display: none;
}

@media (max-width: 800px) {
  .shell {
    width: min(100vw - 24px, 720px);
    padding: 28px 0;
  }

  .grid,
  .dashboard,
  .form.inline,
  .stats {
    grid-template-columns: 1fr;
  }

  .span-2 {
    grid-column: span 1;
  }
}