:root{--bg: #eef2f7;--card: #ffffff;--text: #0f172a;--muted: #64748b;--hint: #94a3b8;--border: #e2e8f0;--field-bg: #f8fafc;--field-focus: #2563eb;--shadow: 0 1px 3px rgba(15, 23, 42, .08), 0 4px 14px rgba(15, 23, 42, .06);--danger: #dc2626;--danger-bg: #fee2e2;--accent-soft: #dbeafe;--copy-bg: #eff6ff;--copy-text: #2563eb;--clear-bg: #ef4444;--clear-text: #ffffff}html[data-theme=dark]{--bg: #0b1220;--card: #111a2c;--text: #e2e8f0;--muted: #94a3b8;--hint: #64748b;--border: #1e293b;--field-bg: #0b1220;--field-focus: #3b82f6;--shadow: 0 1px 3px rgba(0, 0, 0, .5), 0 6px 18px rgba(0, 0, 0, .4);--danger: #f87171;--danger-bg: #3a1518;--accent-soft: #1e3a5f;--copy-bg: #16283f;--copy-text: #93c5fd;--clear-bg: #dc2626;--clear-text: #ffffff}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);min-height:100dvh;transition:background-color .25s ease,color .25s ease;padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom);padding-left:env(safe-area-inset-left);padding-right:env(safe-area-inset-right)}.app{max-width:640px;margin:0 auto;padding:16px 16px 32px;display:flex;flex-direction:column;gap:14px}.app-header{display:flex;align-items:center;justify-content:space-between;padding:4px 2px}.app-title{margin:0;font-size:22px;font-weight:700;letter-spacing:.5px}.icon-btn{width:44px;height:44px;border-radius:12px;border:1px solid var(--border);background:var(--card);color:var(--text);font-size:20px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;box-shadow:var(--shadow);transition:transform .1s ease}.icon-btn:active{transform:scale(.94)}.converter{display:flex;flex-direction:column;gap:14px}.card{background:var(--card);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow);padding:14px 14px 16px;transition:background-color .25s ease,border-color .25s ease}.card-head{display:flex;align-items:center;gap:8px;margin-bottom:12px}.badge{display:inline-block;font-size:12px;font-weight:700;color:#fff;padding:3px 8px;border-radius:6px;letter-spacing:.5px;line-height:1.2}.badge-green{background:#22c55e}.badge-amber{background:#f59e0b}.badge-blue{background:#3b82f6}.badge-purple{background:#a855f7}.base-name{font-size:15px;font-weight:600;color:var(--muted)}.hint{margin-left:auto;font-size:12px;color:var(--hint);font-variant-numeric:tabular-nums}.row{display:flex;gap:10px;align-items:stretch}.field{flex:1;min-width:0;height:52px;padding:0 14px;font-size:20px;font-family:SF Mono,JetBrains Mono,Cascadia Code,Consolas,Roboto Mono,monospace;font-variant-numeric:tabular-nums;color:var(--text);background:var(--field-bg);border:1px solid var(--border);border-radius:12px;outline:none;transition:border-color .15s ease,box-shadow .15s ease}.field:focus{border-color:var(--field-focus);box-shadow:0 0 0 3px var(--accent-soft)}.field::placeholder{color:var(--hint)}.copy-btn{flex:0 0 auto;min-width:64px;height:52px;padding:0 14px;font-size:15px;font-weight:600;color:var(--copy-text);background:var(--copy-bg);border:1px solid var(--border);border-radius:12px;cursor:pointer;transition:transform .1s ease,opacity .1s ease}.copy-btn:active{transform:scale(.96);opacity:.85}.actions{display:flex;justify-content:center;margin-top:4px}.clear-btn{width:100%;height:52px;font-size:16px;font-weight:700;color:var(--clear-text);background:var(--clear-bg);border:none;border-radius:14px;cursor:pointer;box-shadow:var(--shadow);transition:transform .1s ease,opacity .1s ease}.clear-btn:active{transform:scale(.98);opacity:.9}.toast{position:fixed;left:50%;bottom:calc(40px + env(safe-area-inset-bottom));transform:translate(-50%) translateY(20px);background:#0f172aeb;color:#fff;padding:10px 18px;border-radius:12px;font-size:14px;opacity:0;pointer-events:none;transition:opacity .2s ease,transform .2s ease;z-index:50;max-width:86vw;word-break:break-all;text-align:center}.toast.show{opacity:1;transform:translate(-50%) translateY(0)}.error-box{display:none;background:var(--danger-bg);color:var(--danger);border:1px solid var(--danger);border-radius:12px;padding:12px 14px;font-size:14px;line-height:1.5;word-break:break-all}.error-box.show{display:block}@media (min-width: 520px){.converter{display:grid;grid-template-columns:1fr 1fr;gap:14px}}