/* Лендинг «Дневник гипертоника» — простой адаптивный стиль, без библиотек. */
:root {
  --color-bg: #f7f9fb;
  --color-surface: #ffffff;
  --color-text: #1f2933;
  --color-muted: #52606d;
  --color-primary: #1476cc;
  --color-primary-dark: #0f5ba3;
  --color-border: #d9e2ec;
  --radius: 12px;
  --shadow: 0 2px 8px rgba(31, 41, 51, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 16px;
}

/* Hero */
.hero {
  background: linear-gradient(160deg, #1476cc 0%, #0f5ba3 100%);
  color: #ffffff;
  text-align: center;
  padding: 72px 0;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  line-height: 1.2;
}

.hero-sub {
  margin: 0 auto 32px;
  max-width: 560px;
  font-size: 1.15rem;
  opacity: 0.92;
}

/* Кнопки */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: var(--radius);
  font-size: 1.1rem;
  font-weight: 600;
  text-decoration: none;
  transition: background-color 0.15s ease;
}

.btn-primary {
  background: #ffffff;
  color: var(--color-primary-dark);
}

.btn-primary:hover,
.btn-primary:focus {
  background: #e6f0fa;
}

/* Секции */
.section {
  padding: 56px 0;
}

.section-alt {
  background: var(--color-surface);
}

.section h2 {
  margin: 0 0 32px;
  text-align: center;
  font-size: 1.7rem;
}

/* Карточки проблем */
.cards {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 1.15rem;
}

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

/* Шаги */
.steps {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: step;
}

.step {
  text-align: center;
  padding: 24px 16px;
}

.step-icon {
  font-size: 2.4rem;
}

.step h3 {
  margin: 12px 0 8px;
}

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

/* Доверие */
.trust {
  list-style: none;
  margin: 0 auto;
  padding: 0;
  max-width: 560px;
  display: grid;
  gap: 12px;
}

.trust li {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px 20px;
}

.trust li::before {
  content: "✓ ";
  color: var(--color-primary);
  font-weight: 700;
}

/* FAQ */
.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  padding: 4px 20px;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  padding: 12px 0;
}

.faq-item p {
  margin: 0 0 16px;
  color: var(--color-muted);
}

/* Футер */
.footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 32px 0;
  text-align: center;
  color: var(--color-muted);
}

.footer-links a {
  color: var(--color-primary);
  text-decoration: none;
}

.footer-links a:hover,
.footer-links a:focus {
  text-decoration: underline;
}

.footer-author {
  margin: 12px 0 0;
}