:root{--fex-primary:#7c3aed;--fex-primary-dark:#6d28d9;--fex-bg:#fff;--fex-border:#e5e7eb;--fex-text:#111827;--fex-text-muted:#6b7280;--fex-hover:#f3f4f6;--fex-active:#ede9fe;--fex-shadow:0 4px 24px rgba(0,0,0,.12);--fex-radius:10px}.fex-cs-switcher{position:relative;display:inline-block;font-family:inherit;font-size:14px;z-index:9999}.fex-cs-current{display:flex;align-items:center;gap:6px;padding:8px 14px;background:var(--fex-bg);border:2px solid var(--fex-border);border-radius:var(--fex-radius);cursor:pointer;user-select:none;font-weight:600;color:var(--fex-text);transition:border-color .2s,box-shadow .2s;white-space:nowrap}.fex-cs-current:hover,.fex-cs-switcher.fex-open .fex-cs-current{border-color:var(--fex-primary);box-shadow:0 0 0 3px rgba(124,58,237,.15)}.fex-cs-symbol{color:var(--fex-text-muted);font-size:12px}.fex-cs-arrow{font-size:10px;color:var(--fex-text-muted);transition:transform .2s}.fex-cs-switcher.fex-open .fex-cs-arrow{transform:rotate(180deg)}.fex-cs-dropdown{display:none;position:absolute;top:calc(100% + 6px);right:0;left:auto;min-width:240px;background:var(--fex-bg);border:1px solid var(--fex-border);border-radius:var(--fex-radius);box-shadow:var(--fex-shadow);list-style:none;margin:0;padding:6px 0;max-height:320px;overflow-y:auto;scroll-behavior:smooth}.fex-cs-dropdown::-webkit-scrollbar{width:5px}.fex-cs-dropdown::-webkit-scrollbar-track{background:0 0}.fex-cs-dropdown::-webkit-scrollbar-thumb{background:var(--fex-border);border-radius:3px}.fex-cs-switcher.fex-open .fex-cs-dropdown{display:block;animation:fexFadeIn .15s ease}@keyframes fexFadeIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.fex-cs-option{display:flex;align-items:center;gap:8px;padding:9px 14px;cursor:pointer;color:var(--fex-text);transition:background .1s}.fex-cs-option:hover{background:var(--fex-hover)}.fex-cs-option.fex-cs-active{background:var(--fex-active);color:var(--fex-primary);font-weight:600}.fex-cs-opt-name{flex:1;font-size:13px}.fex-cs-opt-code{font-weight:700;font-size:12px;color:var(--fex-primary)}.fex-cs-opt-symbol{font-size:12px;color:var(--fex-text-muted)}.fex-cs-loading .fex-cs-current:after{content:'';display:inline-block;width:12px;height:12px;border:2px solid var(--fex-border);border-top-color:var(--fex-primary);border-radius:50%;animation:fexSpin .6s linear infinite;margin-left:6px}@keyframes fexSpin{to{transform:rotate(360deg)}}.fex-cs-converter{background:var(--fex-bg);border:1px solid var(--fex-border);border-radius:var(--fex-radius);padding:20px;max-width:420px;font-size:14px}.fex-cs-conv-title{margin:0 0 16px;font-size:16px;font-weight:700;color:var(--fex-text)}.fex-cs-conv-row{display:flex;gap:10px;align-items:center}.fex-cs-conv-input{flex:0 0 110px;padding:9px 12px;border:1px solid var(--fex-border);border-radius:8px;font-size:15px;font-weight:600;color:var(--fex-text);width:110px}.fex-cs-conv-result{background:var(--fex-hover)}.fex-cs-conv-select{flex:1;padding:9px 10px;border:1px solid var(--fex-border);border-radius:8px;font-size:13px;color:var(--fex-text);cursor:pointer}.fex-cs-conv-equals{text-align:center;font-size:22px;color:var(--fex-primary);margin:8px 0;cursor:pointer}.fex-cs-conv-note{margin:12px 0 0;font-size:11px;color:var(--fex-text-muted)}