:root{font-family:Inter,"Microsoft YaHei",sans-serif;color:#16243a;background:#f4f7fc;--blue:#2d7fe5;--purple:#9650c7;--green:#26a21c;--border:#d7e0ec}
*{box-sizing:border-box}body{margin:0}button,input{font:inherit}
header{display:flex;justify-content:space-between;align-items:center;padding:16px max(18px,calc((100% - 1220px)/2));background:linear-gradient(100deg,#2878df,#4e7dde);color:#fff}
h1{font-size:22px;margin:0 0 5px}h2{font-size:20px;margin:0 0 18px}.account{display:flex;align-items:center;gap:12px}.account form{margin:0}
main{max-width:1220px;margin:20px auto;padding:0 14px}nav{display:flex;gap:8px;margin-bottom:14px}
.panel{background:#fff;border:1px solid var(--border);border-radius:11px;padding:20px;margin-bottom:16px;box-shadow:0 3px 14px #20304a0b}.parameters{border-top:3px solid var(--purple)}.result{border-top:3px solid var(--green)}.rates{border-top:3px solid var(--purple)}
button{background:var(--blue);color:#fff;border:0;border-radius:6px;padding:10px 14px;cursor:pointer;font-weight:700}.secondary,nav button:not(.active),.choice{background:#fff;color:#273950;border:1px solid #cfd8e5}.choice.active,.actions button.active{background:var(--blue);border-color:var(--blue);color:#fff}
.field-row{display:flex;align-items:center;gap:12px;margin:12px 0;min-height:40px}.field-label{width:88px;flex:none;font-weight:600}.choice-group{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.choice{padding:8px 14px}.choice input{width:110px}.currency-picker{display:grid;gap:10px;margin-bottom:14px}.favorite-box{display:flex;align-items:flex-start;gap:12px;min-height:58px;padding:10px;border:1px solid #f0c45b;border-radius:8px;background:#fffaf0}.favorite-box .field-label{padding-top:8px}.favorite-chip{display:inline-flex;align-items:center;padding:0;overflow:hidden}.favorite-chip .currency-select{border:0;border-radius:0;background:transparent;color:inherit;padding:8px 10px}.favorite-chip .unpin{border:0;border-left:1px solid #ffffff55;border-radius:0;background:transparent;color:inherit;padding:8px 9px}.currency-menus{display:grid;grid-template-columns:repeat(5,minmax(100px,1fr));gap:9px}.currency-menu{position:relative}.currency-menu>summary{list-style:none;background:#fff;border:1px solid #cfd8e5;border-radius:7px;padding:10px 12px;font-weight:700;text-align:center;cursor:pointer}.currency-menu>summary::-webkit-details-marker{display:none}.currency-menu[open]>summary{background:var(--blue);color:#fff}.currency-options{position:absolute;z-index:10;top:calc(100% + 5px);left:0;min-width:220px;max-height:320px;overflow:auto;background:#fff;border:1px solid var(--border);border-radius:8px;box-shadow:0 10px 28px #20304a33;padding:6px}.currency-option{display:flex;align-items:center;width:100%;border-radius:5px}.currency-option:hover{background:#edf4ff}.currency-option .currency-select{flex:1;text-align:left;background:transparent;color:#273950;font-weight:500}.currency-option .pin-toggle{background:transparent;color:#d28b00;padding:8px 10px;font-size:18px}.currency-choice{min-width:62px}
input{border:1px solid #c8d3e1;border-radius:6px;padding:9px 11px;min-width:150px}.remark input{flex:1}.error{background:#fff0f0;color:#b82424;padding:10px;border-radius:7px;margin:12px 0}
.result #total{display:block;color:var(--blue);font-size:40px;margin:10px 0 6px}pre{font:inherit;white-space:pre-wrap;line-height:1.55;margin:0 0 8px}.copy-status{height:22px;color:#198b29}.actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px}
.table-wrap{overflow:auto;margin-top:10px}table{border-collapse:collapse;width:100%;min-width:660px}th,td{text-align:center;padding:8px;border-bottom:1px solid #e3e9f1}th{background:var(--purple);color:#fff}.tag{padding:2px 8px;border-radius:12px;background:#e6f4ea;color:#187a3a}.tag.cash{background:#fff1dc;color:#9c5900}.rate-selector{margin-top:12px}.history-item{padding:12px 0;border-bottom:1px solid #e5eaf1}
.login{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#2878df,#874bb4)}.login-card{width:min(420px,calc(100% - 32px));background:#fff;padding:36px;border-radius:16px}.login-card form{display:grid;gap:16px}.login-card h1{color:#273142}
@media(max-width:700px){header{align-items:flex-start}.account{flex-direction:column;align-items:flex-end}.field-row,.favorite-box{align-items:flex-start;flex-direction:column}.field-label{width:auto}.currency-menus{grid-template-columns:repeat(2,1fr)}.remark input{width:100%}.result #total{font-size:32px}.panel{padding:16px}}