:root {
  --brand: #015461;
  --brand-hover: #013e48;
  --brand-soft: #e7f2f3;
  --text: #0f172a;
  --muted: #5a6b73;
  --border: #e5e7eb;
  --bg: #eef2f4;
  --card: #ffffff;
  --font: "Inter", ui-sans-serif, system-ui, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--brand);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 20px 48px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.brand-icon img {
  width: 24px;
  height: 24px;
}

.brand-title {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-sub {
  font-size: 13px;
  color: var(--muted);
  margin-top: -2px;
}

nav {
  display: flex;
  gap: 16px;
  font-size: 14px;
  font-weight: 500;
}

nav a.active {
  color: var(--brand);
  font-weight: 600;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 32px;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

h1 {
  margin: 0 0 8px;
  font-size: 28px;
  letter-spacing: -0.03em;
}

.lead {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 15px;
}

h2 {
  margin: 28px 0 10px;
  font-size: 18px;
}

p,
li {
  font-size: 15px;
  color: #334155;
}

ul {
  padding-left: 20px;
}

.updated {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 20px;
}

.footer {
  margin-top: 28px;
  text-align: center;
  font-size: 13px;
  color: var(--muted);
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font: inherit;
  font-size: 14px;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(1, 84, 97, 0.12);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  background: var(--brand);
  color: #fff;
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.btn:hover {
  background: var(--brand-hover);
}

.success-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--brand-soft);
  color: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 16px;
}

.center {
  text-align: center;
}

@media (max-width: 600px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
  }

  nav {
    flex-wrap: wrap;
  }

  .card {
    padding: 20px;
  }
}