:root{--bg: #FDF3E6;--paper: #FFFFFF;--sunk: #F5E9DA;--ink: #2A2140;--muted: #7D7290;--line: #EADCCB;--orange: #FF7A1A;--teal: #2FCDB0;--coral: #FF4D63;--violet: #7B5BD6;--sun: #FFC94D;--on-accent: #FFFFFF;--shadow: 0 1px 2px rgba(42, 33, 64, .06), 0 6px 20px rgba(42, 33, 64, .06);--font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Hiragino Sans", "Noto Sans CJK JP", "Noto Sans SC", sans-serif;--r-lg: 22px;--r-md: 16px;--r-sm: 10px;color-scheme:light}@media(prefers-color-scheme:dark){:root{--bg: #1B1626;--paper: #262035;--sunk: #201A2D;--ink: #F7EEE3;--muted: #A99FBB;--line: #382F4A;--orange: #FF8A33;--teal: #3ED9BD;--coral: #FF6175;--violet: #9579EA;--sun: #FFD066;--on-accent: #1B1626;--shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, 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70%,transparent)}.nav-in{display:flex;gap:6px;background:var(--paper);border-radius:999px;padding:6px;box-shadow:var(--shadow)}.nav button{width:56px;height:46px;border-radius:999px;display:grid;place-items:center;color:var(--muted)}.nav button[aria-current=page]{background:var(--orange);color:var(--on-accent)}.chat{flex:1;display:flex;flex-direction:column;gap:12px;padding-block:8px 20px}.bub{max-width:86%;padding:12px 14px;border-radius:18px;font-size:15.5px;animation:pop .25s ease-out}.bub.partner{background:var(--paper);border-bottom-left-radius:6px;box-shadow:var(--shadow);align-self:flex-start;display:flex;gap:10px;align-items:flex-start}.bub.partner button{color:var(--orange)}.bub.learner{background:var(--teal);color:var(--on-accent);border-bottom-right-radius:6px;align-self:flex-end}.bub.live{background:transparent;color:var(--ink);border:2px dashed var(--teal)}@keyframes 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svg{flex:none;color:var(--orange);margin-top:1px}.doc-photo{display:block;width:100%;max-height:260px;overflow:hidden;border-radius:var(--r-lg);box-shadow:var(--shadow);padding:0}.doc-photo img{display:block;width:100%;height:100%;object-fit:cover}.row3{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.doc-result{display:flex;flex-direction:column;gap:10px}.doc-result h2{font-size:18px}.terms{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}.terms li{display:grid;grid-template-columns:28px auto 1fr;gap:8px;align-items:center;font-size:14px}.terms li span{color:var(--muted)}.terms button{color:var(--orange)}