:root {
  color-scheme: dark;
  --ink: #f5fbf8;
  --muted: #abc9c5;
  --deep: #03162d;
  --panel: rgba(7, 42, 58, 0.78);
  --line: rgba(175, 231, 213, 0.18);
  --coral: #ff857f;
  --foam: #a8f0d5;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 50% -10%, rgba(26, 151, 145, 0.42), transparent 42rem),
    linear-gradient(180deg, #05283d 0%, var(--deep) 65%);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

a { color: var(--foam); }

.shell {
  width: min(760px, calc(100% - 36px));
  margin: 0 auto;
  padding: 56px 0 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 34px;
  color: var(--ink);
  text-decoration: none;
}

.mark {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border-radius: 15px;
  color: var(--coral);
  background: linear-gradient(145deg, #0d4b57, #051a34);
  border: 1px solid var(--line);
  font-size: 26px;
}

.brand strong { font-size: 1.25rem; letter-spacing: 0.01em; }

.card {
  padding: clamp(24px, 5vw, 44px);
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--panel);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(18px);
}

h1 { margin: 0 0 10px; font-size: clamp(2rem, 7vw, 3.4rem); line-height: 1.1; }
h2 { margin: 36px 0 10px; color: var(--foam); font-size: 1.2rem; }
p, li { color: var(--muted); }
ul { padding-left: 1.25rem; }
.lead { font-size: 1.08rem; }
.meta { margin-bottom: 30px; color: #7facaa; font-size: 0.92rem; }
.rule { height: 1px; margin: 32px 0; background: var(--line); }
.links { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.links a {
  padding: 10px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  text-decoration: none;
}
.en { margin-top: 48px; padding-top: 38px; border-top: 1px solid var(--line); }
footer { padding-top: 26px; color: #779f9d; font-size: 0.86rem; text-align: center; }