:root {
  --bg: #f4f7f8;
  --panel: #ffffff;
  --ink: #1f2937;
  --muted: #4b5563;
  --accent: #0f766e;
  --accent-soft: #dff7f3;
  --border: #d7e3e1;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.65;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 0%, #d7f1ed 0%, rgba(215, 241, 237, 0) 45%),
    radial-gradient(circle at 90% 10%, #e6f6ff 0%, rgba(230, 246, 255, 0) 38%),
    var(--bg);
}

.container {
  max-width: 940px;
  margin: 2rem auto;
  padding: 0 1rem 2rem;
}

.hero,
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 8px 24px rgba(15, 118, 110, 0.08);
}

.hero {
  padding: 1.5rem;
  margin-bottom: 1rem;
  border-top: 5px solid var(--accent);
}

.tag {
  display: inline-block;
  background: var(--accent-soft);
  color: #0c5f58;
  border: 1px solid #bdebe3;
  border-radius: 999px;
  padding: 0.2rem 0.7rem;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

h1 {
  margin: 0.8rem 0 0.6rem;
  font-size: 1.9rem;
  line-height: 1.3;
  color: #0c5f58;
}

h2 {
  margin: 0 0 0.55rem;
  color: var(--accent);
  font-size: 1.14rem;
}

p {
  margin: 0.45rem 0;
}

a {
  color: #0b6b63;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.lead,
.intro,
.updated,
.answer {
  color: var(--muted);
}

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

.feature-card {
  grid-column: 1 / -1;
}

.card {
  padding: 1.2rem;
}

ul {
  margin: 0.2rem 0 0;
  padding-left: 1.2rem;
}

li {
  margin: 0.35rem 0;
}

.faq-item + .faq-item {
  margin-top: 0.9rem;
  padding-top: 0.9rem;
  border-top: 1px dashed var(--border);
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.65rem 0.8rem;
  background: #fcfefe;
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  color: #14534d;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  float: right;
  font-weight: 700;
  color: var(--accent);
}

.faq-item[open] summary::after {
  content: "-";
}

.question {
  margin: 0;
  font-weight: 700;
  color: #14534d;
}

.faq-section {
  margin-top: 1rem;
}

.site-footer {
  margin-top: 1rem;
  border-top: 1px solid var(--border);
  background: #edf4f3;
}

.footer-inner {
  max-width: 940px;
  margin: 0 auto;
  padding: 0.9rem 1rem;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.footer-nav a {
  color: #0c5f58;
  font-size: 0.92rem;
  font-weight: 600;
}

.privacy-page .container {
  max-width: 900px;
}

.privacy-page .footer-inner {
  max-width: 900px;
}

.privacy-page .card {
  padding: 1.5rem;
}

.privacy-page h1 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1.8rem;
}

.privacy-page h2 {
  margin-top: 1.5rem;
  margin-bottom: 0.4rem;
  font-size: 1.12rem;
}

@media (min-width: 760px) {
  .grid {
    grid-template-columns: 1.1fr 0.9fr;
  }
}

@media (max-width: 759px) {
  body {
    line-height: 1.58;
    background: var(--bg);
  }

  .container {
    margin: 0;
    padding: 0;
  }

  .hero,
  .card {
    border-left: 0;
    border-right: 0;
    border-radius: 0;
    box-shadow: none;
  }

  .hero {
    padding: 1rem 0.9rem 1.1rem;
    margin-bottom: 0.5rem;
  }

  .card {
    padding: 0.95rem 0.9rem;
  }

  h1 {
    font-size: 1.55rem;
    margin: 0.7rem 0 0.5rem;
  }

  h2 {
    font-size: 1.05rem;
    margin-bottom: 0.45rem;
  }

  .tag {
    font-size: 0.76rem;
    padding: 0.18rem 0.62rem;
  }

  .lead,
  .intro,
  .updated,
  .answer,
  p,
  li {
    font-size: 0.97rem;
  }

  .lead,
  .intro,
  .answer,
  p,
  li {
    line-height: 1.58;
  }

  ul {
    padding-left: 1.05rem;
  }

  li {
    margin: 0.3rem 0;
  }

  .faq-item {
    padding: 0.65rem 0.7rem;
    border-left: 0;
    border-right: 0;
    border-radius: 0;
  }

  .faq-item summary {
    position: relative;
    padding-right: 1.5rem;
    line-height: 1.45;
  }

  .faq-item summary::after {
    float: none;
    position: absolute;
    right: 0.7rem;
  }

  .faq-section {
    margin-top: 0.5rem;
  }

  .site-footer {
    margin-top: 0.5rem;
  }

  .footer-inner {
    padding: 0.8rem 0.9rem;
  }

  .footer-nav {
    gap: 0.6rem 0.85rem;
  }
}