:root{--bg: #f5f7fa;--panel: #ffffff;--panel-2: #eef1f6;--text: #1c2230;--muted: #6b7280;--border: #dfe3ea;--accent: #3b6cff;--mine: #3b6cff;--mine-text: #ffffff;--theirs: #eef1f6;--theirs-text: #1c2230;--ok: #1f9d57;--warn: #b97c12;--err: #d23b38}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}.app{max-width:640px;margin:0 auto;min-height:100vh;display:flex;flex-direction:column;padding:16px;gap:12px}.header{display:flex;align-items:center;justify-content:space-between}.header h1{font-size:20px;margin:0;letter-spacing:.5px}.status{font-size:12px;padding:4px 10px;border-radius:999px;background:var(--panel-2);color:var(--muted)}.status--connected{color:var(--ok)}.status--connecting{color:var(--warn)}.status--error,.status--disconnected{color:var(--err)}.id-bar{display:flex;align-items:center;gap:10px;background:var(--panel);border:1px solid var(--border);padding:10px 12px;border-radius:10px}.id-label{font-size:12px;color:var(--muted)}.id-value{flex:1;font-size:13px;background:var(--panel-2);padding:6px 8px;border-radius:6px;overflow-x:auto;white-space:nowrap}.connect,.composer{display:flex;gap:8px}.auth-tabs{display:flex;gap:8px;margin-bottom:10px}.auth-tabs .btn{flex:1}.new-group{margin-top:10px}.new-group summary{cursor:pointer;padding:4px 0;color:var(--accent, #2563eb)}.conv-list{margin-top:14px}.conv-list-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}.conv-item{display:block;width:100%;text-align:left;margin:4px 0;padding:10px 12px;border:1px solid var(--border, #e5e7eb);border-radius:8px;background:#fff;cursor:pointer;font-size:15px}.conv-item:hover{background:var(--card, #f3f4f6)}.input{flex:1;background:var(--panel);border:1px solid var(--border);color:var(--text);padding:10px 12px;border-radius:8px;font-size:14px}.input::placeholder{color:var(--muted)}.input:focus{outline:none;border-color:var(--accent)}.input:disabled{opacity:.55;background:var(--panel-2)}.btn{border:1px solid var(--border);background:var(--panel);color:var(--text);padding:10px 14px;border-radius:8px;font-size:14px;cursor:pointer}.btn:disabled{opacity:.5;cursor:not-allowed}.btn--primary{background:var(--accent);border-color:var(--accent);color:#fff}.chat{flex:1;background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:12px;overflow-y:auto;display:flex;flex-direction:column;gap:8px;min-height:240px}.empty{color:var(--muted);text-align:center;margin:auto;font-size:14px}.bubble{max-width:78%;padding:8px 12px;border-radius:14px;font-size:14px;line-height:1.35;display:flex;flex-direction:column;gap:2px}.bubble--mine{align-self:flex-end;background:var(--mine);color:var(--mine-text);border-bottom-right-radius:4px}.bubble--theirs{align-self:flex-start;background:var(--theirs);color:var(--theirs-text);border-bottom-left-radius:4px}.bubble-text{word-break:break-word}.bubble--mine .bubble-time{color:#ffffffb3}.bubble--theirs .bubble-time{color:var(--muted)}.bubble-time{font-size:10px;align-self:flex-end}.call-panel{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:16px;display:flex;flex-direction:column;gap:12px}.call-panel--idle{align-items:center;justify-content:center;padding:12px}.btn--call{width:100%}.btn--ok{background:var(--ok);border-color:var(--ok);color:#fff}.btn--danger{background:var(--err);border-color:var(--err);color:#fff}.btn--warn{background:var(--warn);border-color:var(--warn);color:#fff}.call-header{display:flex;flex-direction:column;gap:4px}.call-header h3{margin:0;font-size:15px;font-weight:600}.call-status{font-size:12px;padding:2px 8px;border-radius:4px;font-weight:700}.call-status--idle{background:var(--panel-2);color:var(--muted)}.call-status--calling,.call-status--reconnecting{background:var(--panel-2);color:var(--warn)}.call-status--incoming{background:var(--panel-2);color:var(--accent)}.call-status--connected{background:var(--panel-2);color:var(--ok)}.call-status--error{background:var(--panel-2);color:var(--err)}.call-error{color:var(--err);font-size:13px;margin-top:4px;padding:8px;background:#fdf2f2;border:1px solid #fde8e8;border-radius:6px}.video-container{position:relative;display:grid;grid-template-columns:1fr;gap:12px;background:#000;border-radius:8px;padding:8px;overflow:hidden;min-height:200px}.video-wrapper{position:relative;width:100%;height:100%;display:flex;justify-content:center;align-items:center;background:#111;border-radius:6px}.video{width:100%;max-height:360px;object-fit:cover;border-radius:6px;background:#000}.local-video-wrapper.pip{position:absolute;bottom:16px;right:16px;width:120px;height:90px;border:2px solid var(--panel);box-shadow:0 4px 12px #0000004d;z-index:10}.local-video-wrapper.pip .video{height:100%;max-height:100%;object-fit:cover}.video-label{position:absolute;bottom:8px;left:8px;background:#0009;color:#fff;font-size:11px;padding:2px 6px;border-radius:4px;pointer-events:none}.call-controls{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}.file-transfer{display:flex;flex-direction:column;gap:6px;min-width:180px;padding:2px 0}.file-info{display:flex;flex-direction:column;gap:2px}.file-name{font-weight:500;font-size:13px;word-break:break-all;white-space:pre-wrap}.file-size{font-size:11px;opacity:.8}.file-progress-container{display:flex;align-items:center;gap:8px;margin-top:4px}.file-progress-bar-bg{flex:1;height:6px;background:#0000001a;border-radius:3px;overflow:hidden;position:relative}.bubble--mine .file-progress-bar-bg{background:#ffffff4d}.file-progress-bar{height:100%;background:var(--accent);border-radius:3px;transition:width .1s ease}.bubble--mine .file-progress-bar{background:#fff}.file-progress-text{font-size:11px;font-weight:700}.file-cancel-btn{background:transparent;border:1px solid currentColor;color:inherit;font-size:10px;font-weight:500;padding:2px 6px;border-radius:4px;cursor:pointer;margin-left:auto;display:inline-flex;align-items:center;justify-content:center;transition:background-color .2s,opacity .2s}.file-cancel-btn:hover{background:#ffffff26}.file-download-link{display:inline-flex;align-items:center;justify-content:center;background:var(--accent);color:#fff;border:1px solid var(--accent);border-radius:6px;padding:6px 12px;font-size:12px;font-weight:500;text-decoration:none;margin-top:4px;cursor:pointer;text-align:center;transition:background-color .2s,opacity .2s}.file-download-link:hover{opacity:.9}.bubble--mine .file-download-link{background:#fff;color:var(--accent);border-color:#fff}.bubble--mine .file-download-link:hover{background:#ffffffe6}.file-error-text{font-size:11px;color:var(--err);font-weight:500}.bubble--mine .file-error-text{color:#fcc}.device-selectors{display:flex;flex-direction:column;gap:12px;width:100%;margin-bottom:16px;padding:4px}.selector-group{display:flex;flex-direction:column;gap:4px;align-items:flex-start}.selector-group label{font-size:11px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}.selector-group select{width:100%;padding:8px 10px;border-radius:6px;border:1px solid var(--border);background:var(--panel);color:var(--text);font-size:13px}.selector-group select:focus{outline:none;border-color:var(--accent)}.status--secure{background:#1f9d5714;border:1px solid rgba(31,157,87,.2)}.security-status--secure{color:var(--ok);font-weight:600}.local-video-wrapper.pip .video-label{font-size:9px;padding:1px 4px;bottom:4px;left:4px;max-width:90%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}@media (max-width: 480px){.app{padding:8px;gap:8px}.header h1{font-size:18px}.status{font-size:11px;padding:3px 8px}.id-bar{padding:8px 10px;gap:8px;flex-wrap:wrap}.id-label{font-size:11px}.id-value{font-size:12px;padding:4px 6px;flex-basis:100%;order:3}.btn{padding:8px 12px;font-size:13px}.chat{padding:8px;min-height:200px}.bubble{max-width:88%;padding:8px 10px}.composer{gap:6px}.composer .btn{padding:8px 10px}.composer .input{padding:8px 10px;font-size:13px}.call-panel{padding:10px;gap:8px}.local-video-wrapper.pip{width:90px;height:68px;bottom:8px;right:8px}}