*{box-sizing:border-box;margin:0;padding:0}:root{--bg: #0e1117;--panel: #181c25;--panel-2: #1f2430;--text: #e8ecf3;--text-dim: #8a93a6;--accent: #4f8cff;--accent-dim: #2c4f8f;--green: #3ddc97;--red: #ff6b6b;--key: #232936;--key-fn: #2e3545;--radius: 14px}html,body{height:100%;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang TC,Microsoft JhengHei,Noto Sans TC,sans-serif;-webkit-font-smoothing:antialiased;overscroll-behavior:none}#root{height:100%}.app{max-width:440px;margin:0 auto;height:100dvh;display:flex;flex-direction:column;padding:env(safe-area-inset-top) 12px calc(env(safe-area-inset-bottom) + 8px)}.header{display:flex;align-items:center;justify-content:space-between;padding:12px 4px 8px}.header h1{font-size:20px;font-weight:700}.refresh{background:none;border:none;color:var(--text-dim);font-size:12px;cursor:pointer;padding:6px}.sources{display:flex;gap:8px;overflow-x:auto;padding:4px 2px 10px;scrollbar-width:none}.sources::-webkit-scrollbar{display:none}.source-chip{flex:0 0 auto;display:flex;align-items:center;gap:5px;background:var(--panel);color:var(--text-dim);border:1px solid transparent;border-radius:999px;padding:8px 14px;font-size:14px;cursor:pointer;white-space:nowrap}.source-chip.active{background:var(--accent-dim);border-color:var(--accent);color:var(--text)}.chip-sub{font-size:10px;background:#ffffff1f;border-radius:4px;padding:1px 4px}.panel{background:var(--panel);border-radius:var(--radius);padding:12px;display:flex;flex-direction:column;gap:4px}.row{display:flex;align-items:center;justify-content:space-between;gap:10px;background:var(--panel-2);border-radius:10px;padding:10px 12px;min-height:64px}.currency-btn{display:flex;align-items:center;gap:7px;background:none;border:none;color:var(--text);font-size:16px;cursor:pointer;flex:0 0 auto;padding:4px 0}.currency-btn .flag{font-size:22px}.currency-btn .code{font-weight:700}.currency-btn .name{color:var(--text-dim);font-size:13px}.currency-btn .caret{color:var(--text-dim);font-size:11px}.amount{font-size:clamp(22px,7vw,30px);font-weight:600;font-variant-numeric:tabular-nums;overflow-x:auto;white-space:nowrap;text-align:right;flex:1 1 auto;scrollbar-width:none}.amount::-webkit-scrollbar{display:none}.amount.result{color:var(--green)}.mid-row{display:flex;align-items:center;gap:10px;padding:2px 4px}.swap{background:var(--panel-2);border:1px solid var(--key-fn);color:var(--accent);width:34px;height:34px;border-radius:50%;font-size:16px;cursor:pointer;flex:0 0 auto}.rate-line{color:var(--text-dim);font-size:13px}.notice{color:var(--red);font-size:13px;padding:6px 4px 2px}.notice button{background:none;border:none;color:var(--accent);font-size:13px;cursor:pointer;text-decoration:underline;margin-left:4px}.op-indicator{color:var(--text-dim);font-size:13px;text-align:right;padding:2px 6px 0;font-variant-numeric:tabular-nums}.keypad{flex:1 1 auto;display:grid;grid-template-columns:repeat(4,1fr);grid-template-rows:repeat(5,1fr);gap:8px;padding:12px 0 4px;min-height:260px}.key{background:var(--key);border:none;border-radius:12px;color:var(--text);font-size:22px;font-weight:500;cursor:pointer;touch-action:manipulation;user-select:none;-webkit-user-select:none;transition:filter .08s}.key:active{filter:brightness(1.4)}.key.fn{background:var(--key-fn);color:var(--red);font-size:19px}.key.op{background:var(--key-fn);color:var(--accent)}.key.eq{background:var(--accent);grid-row:span 2}.key.zero{grid-column:span 2}.footer{text-align:center;color:var(--text-dim);font-size:11px;padding:6px 0 2px}.sheet-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0000008c;display:flex;align-items:flex-end;justify-content:center;z-index:10}.sheet{background:var(--panel);border-radius:18px 18px 0 0;width:100%;max-width:440px;padding:10px 16px calc(env(safe-area-inset-bottom) + 16px);animation:slide-up .18s ease-out}@keyframes slide-up{0%{transform:translateY(40%);opacity:.5}to{transform:translateY(0);opacity:1}}.sheet-handle{width:38px;height:4px;border-radius:2px;background:var(--key-fn);margin:2px auto 10px}.sheet h2{font-size:15px;color:var(--text-dim);margin-bottom:8px}.currency-list{list-style:none;max-height:56dvh;overflow-y:auto}.currency-item{display:flex;align-items:center;gap:10px;width:100%;background:none;border:none;color:var(--text);font-size:17px;padding:13px 6px;cursor:pointer;border-bottom:1px solid rgba(255,255,255,.05)}.currency-item .flag{font-size:24px}.currency-item .code{font-weight:700;min-width:48px;text-align:left}.currency-item .name{color:var(--text-dim);flex:1;text-align:left}.currency-item .tag{font-size:11px;color:var(--red);border:1px solid var(--red);border-radius:5px;padding:2px 6px}