:root {
--bg: #f6f7f8;
--surface: #ffffff;
--text: #15181d;
--muted: #566070;
--line: #dde1e6;
--accent: #1f6f54;
--accent-text: #ffffff;
--accent-soft: #e4f0eb;
--radius: 8px;
--max: 1120px;
--font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
:root {
--bg: #101316;
--surface: #171b1f;
--text: #eceff1;
--muted: #a0a9b3;
--line: #2a3037;
--accent: #5cc4a0;
--accent-text: #0b1511;
--accent-soft: #16251f;
}
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
margin: 0;
background: var(--bg);
color: var(--text);
font-family: var(--font);
font-size: 1.0625rem;
line-height: 1.65;
}
a { color: inherit; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
.skip {
position: absolute; left: 1rem; top: -4rem; background: var(--accent); color: var(--accent-text);
padding: .6rem 1rem; border-radius: var(--radius); z-index: 10; text-decoration: none; font-weight: 600;
}
.skip:focus { top: 1rem; }
.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }
.nav { border-bottom: 1px solid var(--line); background: var(--bg); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 1.5rem; }
.brand { font-weight: 700; font-size: 1.15rem; letter-spacing: -.01em; text-decoration: none; white-space: nowrap; }
.nav ul { display: flex; gap: 1.75rem; list-style: none; margin: 0; padding: 0; }
.nav ul a { text-decoration: none; color: var(--muted); font-size: .98rem; }
.nav ul a:hover { color: var(--text); }
.btn {
display: inline-block; white-space: nowrap; text-decoration: none; font-weight: 600; font-size: 1rem;
padding: .8rem 1.35rem; border-radius: var(--radius); border: 1px solid transparent;
background: var(--accent); color: var(--accent-text);
transition: transform .15s ease, opacity .15s ease;
}
.btn:hover { opacity: .92; }
.btn:active { transform: translateY(1px); }
.btn.ghost { background: transparent; color: var(--text); border-color: var(--line); }
.btn.ghost:hover { border-color: var(--muted); opacity: 1; }
.nav .btn { padding: .6rem 1.1rem; font-size: .95rem; }
.hero { padding: 5rem 0 5rem; }
.hero h1 {
font-size: clamp(2.2rem, 4.8vw, 3.7rem); line-height: 1.06; letter-spacing: -.03em;
margin: 0 0 1.5rem; max-width: 27ch; font-weight: 700;
}
.hero p { font-size: clamp(1.1rem, 1.6vw, 1.3rem); color: var(--muted); max-width: 34ch; margin: 0 0 2.25rem; line-height: 1.5; }
.actions { display: flex; flex-wrap: wrap; gap: .85rem; }
section { padding: 5.5rem 0; }
section.alt { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
h2 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); line-height: 1.12; letter-spacing: -.02em; margin: 0 0 1.25rem; font-weight: 700; max-width: 30ch; }
h3 { font-size: 1.15rem; margin: 0 0 .6rem; font-weight: 650; letter-spacing: -.005em; }
.lead { color: var(--muted); max-width: 60ch; margin: 0 0 3rem; }
.scope { display: grid; grid-template-columns: 1.25fr 1fr; gap: 4rem; }
.scope ul { list-style: none; padding: 0; margin: 0; display: grid; gap: .85rem; }
.scope li { padding-left: 1.25rem; position: relative; }
.scope li::before { content: ""; position: absolute; left: 0; top: .78em; width: .5rem; height: 2px; background: var(--accent); }
.scope .keep { border-left: 2px solid var(--accent); padding-left: 2rem; }
.scope .keep p { color: var(--muted); margin: 1.25rem 0 0; }
.steps { display: grid; gap: 0; max-width: 860px; }
.step { display: grid; grid-template-columns: 15rem 1fr; gap: 2rem; padding: 1.75rem 0; border-top: 1px solid var(--line); }
.step:last-child { border-bottom: 1px solid var(--line); }
.step h3 { margin: 0; font-size: 1.25rem; }
.step p { margin: 0; color: var(--muted); }
.example { display: grid; grid-template-columns: 1fr 1.25fr; gap: 1.5rem; align-items: start; }
.msg { border: 1px solid var(--line); border-radius: var(--radius); padding: 1.6rem 1.75rem; background: var(--bg); }
.msg.reply { background: var(--accent-soft); border-color: transparent; border-left: 3px solid var(--accent); }
.msg .who { font-size: .9rem; font-weight: 650; color: var(--muted); margin: 0 0 .75rem; }
.msg p { margin: 0 0 .8rem; }
.msg p:last-child { margin-bottom: 0; }
.note { color: var(--muted); font-size: .95rem; margin: 1.5rem 0 0; }
.about { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; }
.about p { margin: 0 0 1rem; color: var(--muted); }
.about p:last-child { margin-bottom: 0; }
.about .first { color: var(--text); font-size: 1.2rem; line-height: 1.55; }
.faq { max-width: 780px; }
details { border-top: 1px solid var(--line); padding: 1.15rem 0; }
details:last-of-type { border-bottom: 1px solid var(--line); }
summary { cursor: pointer; font-weight: 600; font-size: 1.1rem; list-style: none; display: flex; justify-content: space-between; gap: 1rem; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--accent); font-size: 1.4rem; line-height: 1; font-weight: 400; }
details[open] summary::after { content: "-"; }
details p { margin: .85rem 0 0; color: var(--muted); max-width: 62ch; }
.final { text-align: left; }
.final h2 { max-width: 20ch; }
.final p { color: var(--muted); max-width: 52ch; margin: 0 0 2rem; }
footer { border-top: 1px solid var(--line); padding: 2.5rem 0 3rem; color: var(--muted); font-size: .95rem; }
footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem 2rem; }
footer ul { display: flex; gap: 1.5rem; list-style: none; margin: 0; padding: 0; flex-wrap: wrap; }
footer a { text-decoration: none; }
footer a:hover { text-decoration: underline; }
.legal { padding: 4rem 0 5rem; max-width: 760px; }
.legal h1 { font-size: clamp(2rem, 4vw, 2.8rem); letter-spacing: -.02em; line-height: 1.1; margin: 0 0 2rem; }
.legal h2 { font-size: 1.3rem; max-width: none; margin: 2.25rem 0 .6rem; }
.legal p, .legal li { color: var(--muted); }
.legal strong { color: var(--text); }
@media (max-width: 767px) {
body { font-size: 1rem; }
.nav ul { display: none; }
.hero { padding: 3.5rem 0 3.5rem; }
section { padding: 3.5rem 0; }
.scope, .about, .example { grid-template-columns: 1fr; gap: 2.25rem; }
.scope .keep { padding-left: 1.25rem; }
.step { grid-template-columns: 1fr; gap: .5rem; padding: 1.4rem 0; }
.actions .btn { width: 100%; text-align: center; }
}
@media (prefers-reduced-motion: reduce) {
html { scroll-behavior: auto; }
.btn { transition: none; }
}