:root {
  --accent: #1d7f6b;
  --accent-dark: #145d50;
  --accent-soft: #e8f2ef;
  --text: #1b1f1e;
  --muted: #5a6360;
  --bg: #ffffff;
  --border: #e0e4e7;
  --surface: #f0f0ed;
  --radius: 12px;
  --container: 1100px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--text);
  background-color: #f6f5f2;
  background-image:
    radial-gradient(circle at 15% 10%, rgba(29, 127, 107, 0.08), transparent 32%),
    linear-gradient(0deg, rgba(29, 127, 107, 0.03) 1px, transparent 1px);
  background-size: auto, 100% 28px;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

.container {
  width: min(100% - 2rem, var(--container));
  margin: 0 auto;
}

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

.site-header {
  position: sticky;
  top: 0;
  background: linear-gradient(90deg, rgba(232, 242, 239, 0.96), rgba(255, 255, 255, 0.96));
  border-bottom: 1px solid rgba(29, 127, 107, 0.18);
  z-index: 10;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  gap: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background:
    linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.35),
    0 2px 6px rgba(17, 77, 65, 0.18);
  position: relative;
  flex: 0 0 28px;
}

.brand-mark::before {
  content: "";
  position: absolute;
  inset: 6px 7px 6px 8px;
  border-radius: 0 10px 10px 0;
  background: rgba(255, 255, 255, 0.92);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.95rem;
}

.nav-links a {
  padding: 0.35rem 0.6rem;
  border-radius: 999px;
}

.nav-links a.active,
.nav-links a:hover {
  background: var(--surface);
}

.menu-toggle {
  display: none;
  border: 1px solid var(--border);
  background: var(--bg);
  padding: 0.45rem 0.7rem;
  border-radius: 999px;
  font-size: 0.9rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.2rem;
  border-radius: 999px;
  border: 1px solid var(--accent);
  font-weight: 600;
  transition: background 0.2s ease, color 0.2s ease, border 0.2s ease;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.cta-secondary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn-primary:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
}

.btn:disabled,
.btn.is-working {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  color: #fff;
  opacity: 0.88;
  cursor: wait;
}

.btn-secondary {
  background: transparent;
  color: var(--accent);
}

.hero {
  padding: 3rem 0 2rem;
}

.hero .container {
  max-width: 920px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2rem, 3.6vw, 3rem);
  line-height: 1.2;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.05rem;
  margin-bottom: 1.2rem;
}

.section {
  padding: 2.5rem 0;
}

.section > .container {
  max-width: 980px;
}

.section h2 {
  font-size: clamp(1.5rem, 2.5vw, 2.1rem);
  margin-bottom: 1rem;
  text-align: center;
}

.section p {
  margin-bottom: 0.8rem;
}

.hero p,
.section p,
.list,
.card {
  text-align: left;
}

.grid {
  display: grid;
  gap: 1.2rem;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.grid-wide {
  gap: 2rem;
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.card {
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent-soft);
  border-radius: var(--radius);
  background: #ffffff;
  padding: 1.2rem;
}

.card-head {
  margin-bottom: 1rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--border);
}

.list {
  padding-left: 1.1rem;
}

.list li {
  margin-bottom: 0.5rem;
}

.section-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1rem;
  justify-content: center;
}

.cta-inline {
  flex-wrap: nowrap;
  justify-content: flex-start;
}

.notice {
  background: #ffffff;
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  border: 1px solid var(--border);
}

.site-footer {
  border-top: 1px solid rgba(29, 127, 107, 0.25);
  padding: 2rem 0 2.5rem;
  margin-top: 2rem;
  background: linear-gradient(180deg, #ffffff 0%, #edf4f2 100%);
}

.footer-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  font-size: 0.95rem;
}

form {
  display: grid;
  gap: 1rem;
}

label {
  font-weight: 600;
  margin-bottom: 0.35rem;
  display: inline-block;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.7rem 0.8rem;
  font: inherit;
}

textarea {
  min-height: 140px;
  resize: vertical;
}

.checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
}

.form-note {
  font-size: 0.9rem;
  color: var(--muted);
}

[data-form-message] {
  min-height: 1.4rem;
}

[data-form-message].is-success {
  color: var(--accent-dark);
}

[data-form-message].is-error {
  color: #9f2f2f;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 860px) {
  .nav-links {
    position: absolute;
    left: 1rem;
    right: 1rem;
    top: 64px;
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.9rem;
    display: none;
    flex-direction: column;
    align-items: flex-start;
  }

  .nav-links.open {
    display: flex;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .nav-links .btn {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 640px) {
  .section-cta {
    flex-direction: column;
    align-items: stretch;
  }

  .section-cta .btn {
    width: 100%;
  }
}