:root{color-scheme:light;--ink:#12201c;--muted:#66736f;--line:#dbe5e1;--green:#0c8c64;--green-dark:#076347;--mint:#dff7ed;--cream:#f7f8f3}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--cream);font-family:-apple-system,BlinkMacSystemFont,Hiragino Sans,Yu Gothic UI,sans-serif}a{color:inherit;text-decoration:none}button{font:inherit}.site-header{height:68px;display:flex;align-items:center;justify-content:space-between;padding:0 5vw;background:rgba(247,248,243,.92);border-bottom:1px solid var(--line);position:-webkit-sticky;position:sticky;top:0;z-index:10;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.brand{font-size:20px;font-weight:800;letter-spacing:-.03em}.brand span{color:var(--green)}.site-header nav{display:flex;gap:26px;color:var(--muted);font-size:14px}.shell{width:min(1160px,90vw);margin:0 auto}.hero{min-height:calc(100vh - 68px);display:grid;grid-template-columns:1.05fr .95fr;grid-gap:8vw;gap:8vw;align-items:center}.hero h1{font-size:clamp(44px,6vw,82px);letter-spacing:-.065em;line-height:1.03;margin:12px 0 24px}.hero p{color:var(--muted);line-height:1.9;max-width:580px}.eyebrow{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--green);font-weight:800}.primary-button{display:inline-flex;border:0;border-radius:999px;padding:14px 24px;color:white;background:var(--green);font-weight:700;cursor:pointer}.hero-card{padding:26px;border-radius:32px;background:#fff;box-shadow:0 28px 70px rgba(18,32,28,.12);transform:rotate(1deg)}.mock-message{width:-moz-fit-content;width:fit-content;max-width:82%;padding:12px 16px;border-radius:18px;margin:14px 0;line-height:1.5}.incoming{background:#edf1ef}.outgoing{background:var(--mint);margin-left:auto}.file-card{margin:26px 6%;padding:22px;border:1px solid var(--line);border-radius:22px;display:grid;grid-gap:8px;gap:8px}.file-card small,.file-card span{color:var(--muted);font-size:12px}.file-card strong{font-size:30px}.progress{height:8px;background:#e8efec;border-radius:99px;overflow:hidden}.progress i{display:block;width:68%;height:100%;background:var(--green)}.notice{grid-column:1/-1;background:#fff4cf;color:#705b08;border:1px solid #f0d56c;padding:12px 16px;border-radius:14px;font-size:13px}.page-grid{min-height:calc(100vh - 68px);display:grid;grid-template-columns:340px 1fr;background:white}.conversation-list{border-right:1px solid var(--line);padding:28px}.section-title{display:flex;align-items:center;justify-content:space-between}.section-title h1{margin:0}.section-title button{border:0;background:var(--mint);color:var(--green-dark);width:36px;height:36px;border-radius:50%}.empty-list{color:var(--muted);line-height:1.7;margin-top:50px;font-size:14px}.conversation-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:40px}.conversation-empty p{color:var(--muted);max-width:470px;line-height:1.8}.link-mark{width:72px;height:72px;border-radius:24px;display:grid;place-items:center;background:var(--green);color:#fff;font-size:34px;font-weight:900}.settings{padding:64px 0;max-width:760px}.settings section{background:#fff;border:1px solid var(--line);border-radius:20px;padding:22px;margin:18px 0}.settings h2{font-size:16px}.settings p{color:var(--muted)}.danger-button{border:1px solid #e6a0a0;color:#a01818;background:#fff5f5;padding:10px 14px;border-radius:12px}.pairing-panel{display:grid;justify-items:center;grid-gap:8px;gap:8px}.pairing-panel img{border-radius:18px;border:10px solid white;box-shadow:0 12px 35px rgba(18,32,28,.12)}.secondary-button{border:1px solid var(--line);padding:10px 16px;border-radius:999px;color:var(--muted)}.room-button,.secondary-button{background:white;cursor:pointer}.room-button{display:block;width:100%;border:0;border-bottom:1px solid var(--line);text-align:left;padding:16px;font:inherit}.conversation-pane{display:flex;flex-direction:column;min-height:75vh;padding:20px}.message-list{display:flex;flex:1 1;flex-direction:column;gap:8px;overflow:auto;padding:16px 0}.message{align-self:flex-start;max-width:75%;padding:10px 12px;border-radius:14px;background:#eef2f1;white-space:pre-wrap}.message.own{align-self:flex-end;background:#ccefe2}.composer{display:flex;gap:8px}.composer textarea{flex:1 1;min-height:44px;resize:vertical;border:1px solid var(--line);border-radius:12px;padding:10px;font:inherit}@media (max-width:760px){.hero{grid-template-columns:1fr;padding:60px 0}.hero-card{display:none}.page-grid{grid-template-columns:1fr}.conversation-list{display:none}.site-header nav{gap:14px}}