:root {
  --bg: #F4F1EA;
  --ink: #1C2421;
  --sub: #5B6661;
  --brand: #1F6F5C;
  --brand-soft: #DCEFE8;
  --line: #E2DDD2;
  --card: #FFFFFF;
  --warn: #FFF4D6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121715;
    --ink: #ECF1EE;
    --sub: #A5B1AB;
    --brand: #6FD1B4;
    --brand-soft: #1B2E28;
    --line: #26302C;
    --card: #19201D;
    --warn: #2A2617;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.7 "Pretendard Variable", Pretendard, -apple-system, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  word-break: keep-all;
  overflow-wrap: anywhere;
}
main, .top, footer { max-width: 640px; margin: 0 auto; padding: 0 20px; }

.top { display: flex; align-items: center; gap: 10px; padding-top: 20px; font-weight: 700; }
.top img { border-radius: 10px; }

section { padding: 36px 0; border-bottom: 1px solid var(--line); }
section:last-child { border-bottom: 0; }
h1 { font-size: clamp(28px, 7.4vw, 40px); line-height: 1.3; letter-spacing: -0.02em; margin: 6px 0 16px; }
h2 { font-size: 22px; line-height: 1.4; letter-spacing: -0.01em; margin: 0 0 14px; }
p { margin: 0 0 12px; }

.hero { padding-top: 40px; }
.kicker { color: var(--brand); font-weight: 700; font-size: 15px; margin: 0; }
.lead { color: var(--sub); font-size: 18px; }
.meta { color: var(--sub); font-size: 14px; margin-top: 10px; }

.btn {
  display: inline-block;
  margin-top: 12px;
  padding: 16px 30px;
  border-radius: 14px;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
  font-size: 18px;
  text-decoration: none;
  transition: transform .15s ease, box-shadow .15s ease;
  box-shadow: 0 6px 18px rgba(31, 111, 92, .25);
}
.btn:active { transform: translateY(1px) scale(.99); }
@media (prefers-color-scheme: dark) { .btn { color: #0D1A16; } }

.finds ul { list-style: none; margin: 0; padding: 0; }
.finds li {
  display: grid;
  grid-template-columns: 7.5em 1fr;
  gap: 4px 14px;
  padding: 14px 0;
  border-top: 1px dashed var(--line);
}
.finds li:first-child { border-top: 0; }
.finds b { color: var(--brand); }
.finds span { color: var(--sub); }
@media screen and (max-width: 420px) { .finds li { grid-template-columns: 1fr; } }

.safe { background: var(--brand-soft); border-radius: 18px; padding: 26px 22px; margin: 28px 0; border: 0; }

.steps ol { margin: 0 0 14px; padding-left: 1.3em; }
.steps li { margin-bottom: 8px; }
.note { color: var(--sub); font-size: 15px; }

.warn p { background: var(--warn); padding: 16px 18px; border-radius: 12px; }

.cta { text-align: center; }
.cert { text-align: left; margin-top: 26px; color: var(--sub); font-size: 14px; }
.cert summary { cursor: pointer; }
.cert code { font-size: 12px; word-break: break-all; }

footer { color: var(--sub); font-size: 13px; padding: 24px 20px 48px; }

.err { text-align: center; padding: 80px 0; }
.err a { color: var(--brand); }