:root {
  color-scheme: light;
  --bg: #eef2f6;
  --panel: #ffffff;
  --text: #17202a;
  --muted: #657386;
  --line: #d7dee8;
  --accent: #006d77;
  --accent-dark: #00565f;
  --success: #0f7b45;
  --warning: #9a6200;
  --error: #b42318;
  --shadow: 0 18px 45px rgba(31, 42, 55, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 34px 0;
  display: grid;
  grid-template-columns: minmax(320px, 430px) 1fr;
  gap: 22px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 24px;
}

.heading {
  margin-bottom: 22px;
}

.eyebrow {
  margin: 0 0 7px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: 30px;
  line-height: 1.12;
}

h2 {
  margin-bottom: 0;
  font-size: 24px;
}

.form {
  display: grid;
  gap: 16px;
}

label {
  display: grid;
  gap: 8px;
  color: #2b3542;
  font-size: 14px;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid #c8d2df;
  border-radius: 6px;
  padding: 12px 13px;
  font: inherit;
  color: var(--text);
  background: #fbfcfe;
}

textarea {
  resize: vertical;
  min-height: 180px;
  line-height: 1.45;
}

input:focus,
select:focus,
textarea:focus {
  outline: 3px solid rgba(0, 109, 119, 0.18);
  border-color: var(--accent);
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.grid.compact {
  grid-template-columns: 1fr 120px;
}

button {
  min-height: 46px;
  border: 0;
  border-radius: 6px;
  padding: 0 18px;
  background: var(--accent);
  color: white;
  font-weight: 800;
  cursor: pointer;
}

button:hover {
  background: var(--accent-dark);
}

button:disabled {
  cursor: wait;
  opacity: 0.7;
}

button.secondary {
  min-height: 38px;
  background: #e8edf3;
  color: #283445;
}

.results-panel {
  min-height: 520px;
}

.results-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.summary {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px 14px;
  margin-bottom: 16px;
  background: #f8fafc;
  font-weight: 700;
}

.summary.muted {
  color: var(--muted);
  font-weight: 500;
}

.summary.success {
  color: var(--success);
  border-color: rgba(15, 123, 69, 0.25);
  background: #eefaf4;
}

.summary.warning {
  color: var(--warning);
  border-color: rgba(154, 98, 0, 0.24);
  background: #fff8e8;
}

.summary.error {
  color: var(--error);
  border-color: rgba(180, 35, 24, 0.24);
  background: #fff1f0;
}

.results {
  display: grid;
  gap: 12px;
}

.result {
  border: 1px solid var(--line);
  border-left-width: 5px;
  border-radius: 8px;
  padding: 16px;
  background: white;
}

.result.ok {
  border-left-color: var(--success);
}

.result.bad {
  border-left-color: var(--error);
}

.result-top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
}

.result h3 {
  margin-bottom: 5px;
  font-size: 18px;
}

.result p {
  margin-bottom: 0;
  color: var(--muted);
}

.result strong {
  color: var(--accent);
}

dl {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 14px 0;
}

dt {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

dd {
  margin: 4px 0 0;
  font-weight: 700;
}

summary {
  cursor: pointer;
  color: var(--accent);
  font-weight: 700;
}

ul {
  margin: 12px 0 0;
  padding-left: 18px;
}

li + li {
  margin-top: 8px;
}

li span {
  display: block;
  font-weight: 700;
}

li small {
  color: var(--muted);
}

@media (max-width: 860px) {
  .shell {
    grid-template-columns: 1fr;
    width: min(100% - 22px, 680px);
    padding: 18px 0;
  }

  .grid,
  .grid.compact {
    grid-template-columns: 1fr;
  }

  .panel {
    padding: 18px;
  }
}