:root {
  --ink: #141414; --paper: #F5F3EE; --graphite: #585858; --line: #d9d6cf;
  --bg: var(--paper); --fg: var(--ink); --muted: var(--graphite); --card: #fff;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: var(--ink); --fg: var(--paper); --muted: #9a9790; --line: #2c2c2c; --card: #1c1c1c; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.55 "Geist", -apple-system, Helvetica, Arial, sans-serif; }
a { color: inherit; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
@media (max-width: 600px) { .wrap { padding: 0 16px; } }

header.top { display: flex; align-items: center; justify-content: space-between; padding: 22px 0; }
header.top .logo { height: 22px; display: block; }
header.top nav a { text-decoration: none; font-weight: 600; font-size: 14px; border: 1.5px solid var(--fg); padding: 8px 14px; }
header.top nav { display: flex; align-items: center; gap: 10px; white-space: nowrap; }
header.top nav select { font: 600 14px/1 "Geist", -apple-system, sans-serif; color: var(--fg); background: transparent; border: 0; padding: 8px 4px; cursor: pointer; }
header.top nav select option { color: #141414; }
@media (max-width: 420px) { header.top nav a { padding: 8px 10px; font-size: 13px; } }
.logo-dark { display: none; }
@media (prefers-color-scheme: dark) { .logo-light { display: none; } .logo-dark { display: block; } }

.hero { padding: 72px 0 56px; display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.hero h1 { font-size: clamp(40px, 6vw, 72px); line-height: 1.02; letter-spacing: -0.03em; margin: 0 0 20px; font-weight: 700; }
.hero p.lead { font-size: 19px; color: var(--muted); max-width: 30em; margin: 0 0 28px; }
.badge { display: inline-block; font: 600 12px/1 "Geist Mono", ui-monospace, monospace; letter-spacing: .08em; text-transform: uppercase; border: 1.5px solid var(--fg); padding: 6px 9px; margin-bottom: 22px; }
.btn { display: inline-block; background: var(--fg); color: var(--bg); text-decoration: none; font-weight: 600; padding: 14px 22px; border: 0; font-size: 16px; cursor: pointer; font-family: inherit; }
.btn:disabled { opacity: .5; cursor: wait; }
.square { aspect-ratio: 1; background: var(--fg); position: relative; max-width: 420px; width: 100%; justify-self: end; }
.square::after { content: ""; position: absolute; left: 65%; top: 25%; width: 15%; height: 55%; background: var(--bg); transform-origin: 50% 100%; animation: tip 6s ease-in-out infinite; }
@keyframes tip { 0%, 80%, 100% { transform: rotate(0); } 88% { transform: rotate(-90deg) translateX(-30%); } }
@media (prefers-reduced-motion: reduce) { .square::after { animation: none; } }
@media (max-width: 820px) { .hero { grid-template-columns: 1fr; padding-top: 32px; } .square { justify-self: start; max-width: 220px; } }

section { padding: 56px 0; border-top: 1px solid var(--line); }
section h2 { font-size: 28px; letter-spacing: -0.02em; margin: 0 0 28px; }
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.features div { background: var(--bg); padding: 22px; }
.features h3 { margin: 0 0 6px; font-size: 16px; }
.features p { margin: 0; color: var(--muted); font-size: 15px; }
@media (max-width: 820px) { .features { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .features { grid-template-columns: 1fr; } }

.shots { display: grid; grid-template-columns: 2fr 1fr; gap: 16px; }
.shots figure { margin: 0; }
.shots img, .shots .ph { width: 100%; display: block; border: 1px solid var(--line); background: var(--card); }
.shots .ph { aspect-ratio: 16/10; display: grid; place-items: center; color: var(--muted); font-size: 14px; }
.shots figcaption { font-size: 13px; color: var(--muted); margin-top: 8px; }
@media (max-width: 700px) { .shots { grid-template-columns: 1fr; } }

.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
@media (max-width: 820px) { .cols { grid-template-columns: 1fr; gap: 24px; } }
ul.plain { padding: 0; margin: 0; list-style: none; }
ul.plain li { padding: 10px 0; border-bottom: 1px solid var(--line); }
ul.plain li b { display: inline-block; min-width: 9em; }

form.join { display: grid; gap: 14px; max-width: 520px; }
form.join label { display: grid; gap: 6px; font-size: 14px; font-weight: 600; }
form.join input { font: inherit; padding: 12px 14px; border: 1.5px solid var(--fg); background: var(--card); color: var(--fg); border-radius: 0; width: 100%; }
form.join .hp { position: absolute; left: -9999px; }
form.join .small { font-size: 13px; color: var(--muted); font-weight: 400; }
.result { padding: 16px; border: 1.5px solid var(--fg); display: none; }
.result.show { display: block; }
.result.err { border-color: #b3261e; color: #b3261e; }

footer { padding: 40px 0 60px; color: var(--muted); font-size: 14px; border-top: 1px solid var(--line); }

/* Function pages (link used, admin list) */
body.msg main { max-width: 860px; margin: 0 auto; padding: 64px 16px; }
body.msg h1 { font-size: 30px; letter-spacing: -0.02em; }
body.msg .mark-img { display: block; margin-bottom: 32px; }
@media (prefers-color-scheme: dark) { body.msg .mark-img { filter: invert(1); } }
body.msg table { border-collapse: collapse; width: 100%; font-size: 14px; display: block; overflow-x: auto; }
body.msg th, body.msg td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); white-space: nowrap; }

/* Privacy & Terms page */
article.legal { max-width: 720px; padding: 40px 0 56px; }
article.legal h1 { font-size: clamp(32px, 5vw, 48px); letter-spacing: -0.03em; margin: 0 0 6px; }
article.legal h2 { font-size: 20px; margin: 36px 0 8px; }
article.legal p, article.legal li { color: var(--fg); }
article.legal ul { padding-left: 20px; }
article.legal li { margin: 6px 0; }
article.legal .small { color: var(--muted); font-size: 14px; }
header.top nav a.lang-link { border: 0; padding: 8px 6px; color: var(--muted); }
header.top nav a.lang-link.on { color: var(--fg); text-decoration: underline; }
form.join label.consent { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; font-size: 14px; }
form.join label.consent input { width: 18px; height: 18px; flex: none; margin: 2px 0 0; padding: 0; accent-color: var(--fg); }