:root{--brand:#06c755;--brand-dark:#05a847;--brand-soft:#e7f9ee;--bg:#f4f5f7;--surface:#fff;--border:#e6e8eb;--text:#1a1d21;--text-sub:#8a919a;--danger:#eb4e3d;--warning-bg:#fff8e1;--warning-text:#8a6d3b;--bubble-me:#06c755;--bubble-me-text:#fff;--bubble-other:#fff;--radius:12px;--shadow:0 1px 2px rgba(16,24,32,.06),0 4px 16px rgba(16,24,32,.06);--shadow-pop:0 8px 30px rgba(16,24,32,.16)}*{box-sizing:border-box}body,html{margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Hiragino Sans,Noto Sans JP,Yu Gothic UI,sans-serif;font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased}.app{max-width:520px;margin:0 auto;height:100dvh;overflow-y:auto;background:var(--surface);display:flex;flex-direction:column}@media (min-width:560px){.app{border-left:1px solid var(--border);border-right:1px solid var(--border)}}main{padding:16px;flex:1 1;display:flex;flex-direction:column}h1{font-size:20px;margin:4px 0 16px}h1,h2{font-weight:700}h2{font-size:15px;margin:20px 0 8px}a{color:var(--brand-dark);text-decoration:none}a:hover{text-decoration:underline}p{margin:8px 0}input,select,textarea{font:inherit;color:inherit;background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:10px 14px;outline:none;transition:border-color .15s,box-shadow .15s}input:focus,textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(6,199,85,.15)}input::placeholder{color:var(--text-sub)}button{font:inherit;font-weight:600;color:#fff;background:var(--brand);border:none;border-radius:10px;padding:9px 16px;cursor:pointer;transition:background .15s,opacity .15s,transform .05s}button:hover{background:var(--brand-dark)}button:active{transform:translateY(1px)}button:disabled{opacity:.5;cursor:default;transform:none}button.ghost{background:transparent;color:var(--text);border:1px solid var(--border);font-weight:500}button.ghost:hover{background:var(--bg)}button.danger{background:transparent;color:var(--danger);border:1px solid var(--border);font-weight:500}button.danger:hover{background:#fdf0ee}button.icon{background:transparent;color:var(--text);border:none;padding:6px;font-size:20px;line-height:1;border-radius:10px}button.icon:hover{background:var(--bg)}button.sm{padding:6px 12px;font-size:13px;border-radius:8px}.nav{gap:4px;padding:10px 12px;border-bottom:1px solid var(--border);background:var(--surface);position:-webkit-sticky;position:sticky;top:0;z-index:10}.nav,.nav-brand{display:flex;align-items:center}.nav-brand{gap:8px;font-weight:800;font-size:15px;margin-right:auto;color:var(--text)}.nav-brand:hover{text-decoration:none}.nav-logo{width:26px;height:26px;border-radius:8px;background:var(--brand);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:14px;font-weight:800}.nav a.tab{color:var(--text-sub);font-size:13px;font-weight:600;padding:6px 10px;border-radius:8px}.nav a.tab:hover{text-decoration:none;background:var(--bg)}.nav a.tab.active{color:var(--brand-dark);background:var(--brand-soft)}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:14px}.list{list-style:none;padding:0;margin:0;flex-direction:column}.list,.row{display:flex}.row{align-items:center;gap:12px}.muted{color:var(--text-sub)}.error,.muted{font-size:13px}.error{color:var(--danger)}.notice{color:var(--brand-dark);font-size:13px}.avatar{width:44px;height:44px;border-radius:50%;background:var(--brand-soft);color:var(--brand-dark);font-size:17px;flex-shrink:0}.avatar,.badge{display:inline-flex;align-items:center;justify-content:center;font-weight:700}.badge{background:var(--brand);color:#fff;border-radius:999px;min-width:20px;height:20px;padding:0 6px;font-size:11px}.auth{flex:1 1;flex-direction:column;padding:24px;gap:8px}.auth,.auth-logo{display:flex;justify-content:center}.auth-logo{width:64px;height:64px;border-radius:18px;background:var(--brand);color:#fff;align-items:center;font-size:30px;font-weight:800;margin:0 auto 8px}.auth h1{text-align:center;margin-bottom:20px}.auth form{display:grid;grid-gap:10px;gap:10px}.auth .sub{text-align:center;color:var(--text-sub);font-size:13px;margin-top:16px}.conv-row{display:flex;align-items:center;gap:12px;padding:12px 8px;border-bottom:1px solid var(--border);color:inherit;border-radius:10px}.conv-row:hover{background:var(--bg);text-decoration:none}.conv-main{flex:1 1;min-width:0}.conv-name{font-weight:700;font-size:15px}.conv-preview{color:var(--text-sub);font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.conv-meta{display:flex;flex-direction:column;align-items:flex-end;gap:4px;font-size:11px;color:var(--text-sub)}.chat{padding:0}.chat,.chat-log{min-height:0}.chat-header{display:flex;align-items:center;gap:6px;padding:10px 12px;border-bottom:1px solid var(--border);background:var(--surface);position:-webkit-sticky;position:sticky;top:0;z-index:10}.chat-title{font-weight:700;font-size:16px;margin-right:auto;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.chat-log{flex:1 1;overflow-y:auto;background:var(--bg);padding:12px;display:flex;flex-direction:column;gap:10px}.bubble{border-radius:16px;padding:8px 12px;overflow-wrap:anywhere;box-shadow:0 1px 1px rgba(16,24,32,.04)}.bubble.me{background:var(--bubble-me);color:var(--bubble-me-text);border-bottom-right-radius:4px}.bubble.other{background:var(--bubble-other);color:var(--text);border:1px solid var(--border);border-bottom-left-radius:4px}.bubble.bare{background:transparent;border:none;box-shadow:none;padding:0}.msg-meta{margin-top:2px}.msg-meta,.sender-name{display:block;color:var(--text-sub);font-size:11px}.sender-name{margin-bottom:2px}.reaction-chip{display:inline-flex;align-items:center;gap:3px;border:1px solid var(--border);background:var(--surface);border-radius:999px;padding:1px 8px;cursor:pointer;font-size:13px;color:var(--text);box-shadow:0 1px 1px rgba(16,24,32,.04)}.reaction-chip.mine{border-color:var(--brand);background:var(--brand-soft)}.msg-menu{display:inline-block;text-align:left;margin-top:6px;padding:10px;border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow-pop)}.chat-bar,.msg-menu{background:var(--surface)}.chat-bar{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:8px 12px;border-top:1px solid var(--border);font-size:13px}.chat-bar.accent{background:var(--brand-soft);color:var(--brand-dark)}.chat-bar.warning{background:var(--warning-bg);color:var(--warning-text)}.chat-bar.danger-soft{background:#fdf0ee;color:var(--danger)}.input-bar{display:flex;align-items:center;gap:6px;padding:10px 12px;border-top:1px solid var(--border);background:var(--surface);position:-webkit-sticky;position:sticky;bottom:0}.input-bar input:not([type]),.input-bar input[type=text]{flex:1 1;border-radius:999px;background:var(--bg);border-color:transparent;min-width:0}.input-bar input:focus{background:var(--surface);border-color:var(--brand)}.picker{border-top:1px solid var(--border);background:var(--surface);padding:10px 12px}.picker-tabs{display:flex;gap:6px;align-items:center;margin-bottom:8px}.picker-tab{border:none;border-radius:999px;padding:3px 12px;cursor:pointer;font-size:12px;font-weight:600;background:var(--bg);color:var(--text)}.picker-tab.active{background:var(--brand);color:#fff}.coin-chip{display:inline-flex;align-items:center;gap:6px;background:var(--warning-bg);color:var(--warning-text);font-weight:700;border-radius:999px;padding:4px 12px;font-size:14px}