:root {
  color-scheme: light;
  --ink: #153744;
  --muted: #5d747b;
  --sky: #3da8b4;
  --sky-deep: #0b6d7c;
  --sky-dark: #104b5d;
  --gold: #c89b62;
  --line: rgba(21, 55, 68, .13);
  --paper: rgba(255, 255, 255, .88);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { min-height: 100vh; margin: 0; color: var(--ink); background: #f4f8f7; font-feature-settings: "palt"; }
::selection { color: #fff; background: var(--sky-deep); }
button, input { font: inherit; }
button, .button { min-height: 48px; border: 0; border-radius: 999px; padding: .78rem 1.35rem; color: #fff; background: linear-gradient(135deg, var(--sky-deep), var(--sky-dark)); box-shadow: 0 8px 20px rgba(11, 109, 124, .17); font-weight: 760; cursor: pointer; text-decoration: none; text-align: center; transition: transform .18s ease, box-shadow .18s ease, filter .18s ease; }
button:hover, .button:hover { filter: brightness(.96); transform: translateY(-1px); box-shadow: 0 11px 26px rgba(11, 109, 124, .22); }
button:focus-visible, .button:focus-visible, input:focus-visible, a:focus-visible { outline: 3px solid rgba(61, 168, 180, .34); outline-offset: 3px; }
button.secondary { color: var(--ink); background: #edf5f5; box-shadow: none; }
.sky { position: fixed; inset: 0; z-index: -1; background: radial-gradient(circle at 12% 3%, rgba(177, 226, 228, .72) 0, transparent 34%), radial-gradient(circle at 94% 24%, rgba(241, 213, 178, .64) 0, transparent 31%), linear-gradient(155deg, #f9fcfb 0%, #eef6f5 52%, #f8f3ed 100%); }
.site-header { display: flex; justify-content: space-between; align-items: center; max-width: 1120px; margin: auto; padding: 1.35rem clamp(1rem, 4vw, 2.4rem) 1.05rem; }
.brand { display: grid; color: var(--ink); text-decoration: none; font-family: "Iowan Old Style", "Hiragino Mincho ProN", Georgia, serif; font-size: 1.28rem; font-weight: 650; letter-spacing: .02em; }
.brand small { margin-top: .18rem; color: var(--sky-deep); font: 760 .61rem/1.2 ui-sans-serif, system-ui; letter-spacing: .19em; }
.demo-badge { border: 1px solid rgba(11, 109, 124, .24); border-radius: 999px; padding: .44rem .8rem; color: var(--sky-deep); background: rgba(255,255,255,.74); box-shadow: 0 5px 18px rgba(21,55,68,.05); font-size: .78rem; font-weight: 800; backdrop-filter: blur(12px); }
.safety-banner { position: relative; display: flex; flex-wrap: wrap; gap: .35rem .8rem; max-width: 1040px; margin: 0 auto 1rem; padding: .9rem 1rem .9rem 2.9rem; border: 1px solid rgba(11,109,124,.17); border-radius: 1rem; background: rgba(245,251,250,.8); box-shadow: 0 10px 35px rgba(21,55,68,.045); font-size: .87rem; backdrop-filter: blur(14px); }
.safety-banner::before { position: absolute; top: .78rem; left: 1rem; display: grid; width: 1.35rem; height: 1.35rem; place-items: center; border-radius: 50%; color: #fff; background: var(--sky-deep); content: "i"; font-family: Georgia, serif; font-size: .86rem; font-style: italic; font-weight: 700; }
.safety-banner span { color: var(--muted); }
.demo-nav { position: sticky; top: .5rem; z-index: 2; display: flex; gap: .45rem; max-width: 1040px; margin: 0 auto 1rem; padding: .5rem; overflow-x: auto; border: 1px solid var(--line); border-radius: 999px; background: rgba(255,255,255,.84); backdrop-filter: blur(18px); box-shadow: 0 10px 30px rgba(21,55,68,.08); }
.demo-nav[hidden] { display: none; }
.demo-nav button { flex: 0 0 auto; min-height: 40px; padding: .55rem .95rem; color: var(--ink); background: transparent; font-size: .85rem; }
.demo-nav button:hover { background: #e8f3f3; box-shadow: none; }
main { width: min(1040px, calc(100% - 2rem)); min-height: 55vh; margin: 0 auto; padding: clamp(1.5rem, 4vw, 3.35rem) 0 4rem; outline: none; }
.hero { display: grid; grid-template-columns: 1.08fr .92fr; gap: clamp(2rem, 5vw, 4.5rem); align-items: center; min-height: 56vh; }
.eyebrow { margin: 0 0 .8rem; color: var(--sky-deep); font-size: .72rem; font-weight: 850; letter-spacing: .19em; text-transform: uppercase; }
h1 { max-width: 12ch; margin: 0 0 1.15rem; font-family: "Iowan Old Style", "Hiragino Mincho ProN", Georgia, serif; font-size: clamp(2.65rem, 5.4vw, 4.15rem); font-weight: 650; line-height: 1.08; letter-spacing: -.035em; }
.lead { max-width: 35rem; color: var(--muted); font-size: 1.03rem; line-height: 1.95; }
.panel { position: relative; border: 1px solid rgba(21,55,68,.12); border-radius: 1.55rem; padding: clamp(1.35rem, 4vw, 2.25rem); background: var(--paper); box-shadow: 0 24px 70px rgba(21,55,68,.1); backdrop-filter: blur(16px); }
.join-panel { overflow: hidden; }
.join-panel::before { position: absolute; inset: 0 0 auto; height: 4px; background: linear-gradient(90deg, var(--sky-deep), var(--gold)); content: ""; }
.join-panel form, .upload-panel { display: grid; gap: 1.1rem; }
label { display: grid; gap: .45rem; font-weight: 760; }
input[type="text"], input:not([type]) { width: 100%; min-height: 50px; border: 1px solid rgba(21,55,68,.16); border-radius: .9rem; padding: .78rem .95rem; color: var(--ink); background: rgba(255,255,255,.92); box-shadow: inset 0 1px 2px rgba(21,55,68,.025); }
.check { grid-template-columns: auto 1fr; align-items: start; color: var(--muted); font-size: .86rem; font-weight: 550; line-height: 1.55; }
.check input { margin-top: .2rem; width: 1.1rem; height: 1.1rem; accent-color: var(--sky-deep); }
.page-head { display: flex; justify-content: space-between; gap: 1.5rem; align-items: end; margin-bottom: 1.75rem; }
.page-head h1, .detail h1, .upload-panel h1, .centered h1 { max-width: none; font-size: clamp(2.15rem, 4.6vw, 3.4rem); }
.page-head p { max-width: 34rem; color: var(--muted); line-height: 1.75; }
.photo-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; }
.photo-card { display: grid; gap: .5rem; }
.photo-card > button { display: block; padding: 0; overflow: hidden; border: 1px solid rgba(21,55,68,.09); border-radius: 1.35rem; color: var(--ink); background: rgba(255,255,255,.94); text-align: left; box-shadow: 0 16px 42px rgba(21,55,68,.09); }
.photo-card > button:hover { transform: translateY(-3px); box-shadow: 0 22px 50px rgba(21,55,68,.14); }
.photo-card img { display: block; width: 100%; aspect-ratio: 3/2; object-fit: cover; border-bottom: 1px solid rgba(21,55,68,.07); }
.photo-card span { display: grid; gap: .25rem; padding: .95rem 1rem 1.05rem; }
.photo-card strong { font-size: 1.02rem; }
.photo-card small { color: var(--muted); }
.detail { max-width: 800px; margin: auto; }
.detail > img { display: block; width: 100%; margin-bottom: 1.7rem; border: 1px solid rgba(21,55,68,.08); border-radius: 1.1rem; box-shadow: 0 18px 48px rgba(21,55,68,.1); }
.actions { display: flex; flex-wrap: wrap; gap: .65rem; margin: 1.25rem 0; }
.danger { margin-top: .5rem; color: #8a2830; background: #ffeaec; }
.facts { display: flex; flex-wrap: wrap; gap: .5rem; }
.facts span { border: 1px solid rgba(11,109,124,.1); border-radius: 999px; padding: .46rem .72rem; color: var(--sky-deep); background: #eaf5f3; font-size: .79rem; font-weight: 800; }
.link-button { min-height: auto; padding: 0 .3rem; color: var(--sky-deep); background: transparent; text-decoration: underline; }
.centered, .empty { max-width: 680px; margin: 3rem auto; text-align: center; }
footer { padding: 2rem 1.5rem 3rem; color: var(--muted); text-align: center; font-size: .8rem; }
@media (max-width: 720px) {
  .site-header { padding-inline: 1rem; }
  .safety-banner, .demo-nav { margin-inline: 1rem; }
  .safety-banner { display: grid; padding: .9rem 1rem .9rem 2.9rem; }
  .demo-nav { gap: .2rem; padding: .35rem; }
  .demo-nav button { min-height: 38px; padding: .5rem .7rem; font-size: .8rem; }
  .hero { grid-template-columns: 1fr; gap: 2.1rem; min-height: auto; }
  h1 { max-width: none; font-size: clamp(2.45rem, 12vw, 3.25rem); }
  .lead { font-size: 1rem; line-height: 1.82; }
  .page-head { display: grid; align-items: start; }
  .photo-grid { grid-template-columns: 1fr; }
  main { padding-top: 1.8rem; }
}
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; } }