/* ===== Design Tokens ===== */
:root {
    --c-bg: #f0f2f5;
    --c-card: #ffffff;
    --c-primary: #3b5bdb;
    --c-primary-light: #edf2ff;
    --c-red: #e03131;
    --c-red-bg: #fff5f5;
    --c-green: #2f9e44;
    --c-green-bg: #ebfbee;
    --c-orange: #e8590c;
    --c-orange-bg: #fff4e6;
    --c-text: #1a1a2e;
    --c-text2: #868e96;
    --c-text3: #adb5bd;
    --c-border: #e9ecef;
    --c-input: #f8f9fa;
    --c-dark: #1a1a2e;
    --c-dark2: #2d2d44;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
}

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
    font-family:-apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft YaHei','Helvetica Neue',sans-serif;
    background:var(--c-bg);color:var(--c-text);line-height:1.5;
    -webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent;
    min-height:100vh;
}
input,select,button{font-family:inherit;font-size:inherit}
button{cursor:pointer;border:none;background:none}

/* ===== Topbar ===== */
.topbar{background:var(--c-dark);padding:0 16px;position:sticky;top:0;z-index:100}
.topbar-inner{max-width:420px;margin:0 auto;display:flex;align-items:center;gap:8px;height:48px}
.topbar-icon{color:#748ffc;flex-shrink:0}
.topbar h1{font-size:16px;font-weight:600;color:#fff;letter-spacing:.3px}

/* ===== Main ===== */
.main{max-width:420px;margin:0 auto;padding:12px 12px 72px}

/* ===== Card ===== */
.card{background:var(--c-card);border-radius:var(--radius);margin-bottom:10px;box-shadow:var(--shadow);overflow:hidden}
.card-head{display:flex;align-items:center;justify-content:space-between;padding:12px 14px 0}
.card-head h2{font-size:14px;font-weight:600;color:var(--c-text)}
.card-head.dark{background:var(--c-dark);padding:12px 14px}
.card-head.dark h2{color:#e9ecef}
.card-body{padding:12px 14px 14px}
.sep{height:1px;background:var(--c-border);margin:10px 0}

/* ===== Row / Field ===== */
.row-2{display:flex;gap:10px}
.field{flex:1;min-width:0;margin-bottom:8px}
.field:last-child{margin-bottom:0}
.field label{display:block;font-size:11px;color:var(--c-text2);margin-bottom:3px;font-weight:500;letter-spacing:.2px}
.field input,.field select{
    width:100%;padding:8px 10px;
    border:1.5px solid var(--c-border);border-radius:var(--radius-sm);
    font-size:14px;color:var(--c-text);background:var(--c-input);
    transition:border-color .2s,background .2s,box-shadow .2s;
    -webkit-appearance:none;appearance:none;
}
.field input:focus,.field select:focus{
    outline:none;border-color:var(--c-primary);background:#fff;
    box-shadow:0 0 0 3px rgba(59,91,219,.1);
}
.field select{
    padding-right:28px;
    background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4l4 4 4-4' fill='none' stroke='%23868e96' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat:no-repeat;background-position:right 10px center;
}
.input-wrap{position:relative}
.input-wrap input{padding-right:30px}
.suffix{position:absolute;right:10px;bottom:10px;font-size:12px;color:var(--c-text3)}
.field.mini{max-width:80px}

/* ===== Fee Row ===== */
.fee-row{display:flex;align-items:flex-end;gap:8px}
.fee-row .field{margin-bottom:0}
.fee-tag{display:flex;flex-direction:column;align-items:center;padding:6px 8px;border-radius:6px;background:var(--c-input);border:1.5px solid var(--c-border);min-width:52px}
.ft-label{font-size:10px;color:var(--c-text3);margin-bottom:1px}
.ft-val{font-size:13px;font-weight:600;color:var(--c-text)}

/* ===== Buttons ===== */
.btn-add{
    display:inline-flex;align-items:center;gap:4px;
    background:var(--c-primary);color:#fff;border-radius:6px;padding:5px 12px;font-size:13px;font-weight:600;
}
.btn-add:active{opacity:.85}
.btn-ghost{background:var(--c-card);color:var(--c-text2);border:1.5px solid var(--c-border);border-radius:var(--radius-sm);padding:9px 18px;font-size:14px;font-weight:500}
.btn-ghost:active{background:var(--c-input)}
.btn-ghost-sm{color:var(--c-text3);font-size:12px;padding:4px 8px}
.btn-ghost-sm:active{color:var(--c-text2)}
.btn-primary{background:var(--c-primary);color:#fff;border-radius:var(--radius-sm);padding:10px 20px;font-size:14px;font-weight:600;box-shadow:0 2px 4px rgba(59,91,219,.2)}
.btn-primary:active{opacity:.85}
.btn-calc{width:100%;background:var(--c-primary);color:#fff;border-radius:var(--radius-sm);padding:10px;font-size:14px;font-weight:600;margin-top:4px;box-shadow:0 2px 4px rgba(59,91,219,.2)}
.btn-calc:active{opacity:.85}
.flex-2{flex:2}

/* ===== Trade List ===== */
.trades-list{display:flex;flex-direction:column;gap:6px;padding:0 14px 14px}
.trade-item{
    display:flex;align-items:flex-start;gap:10px;
    padding:10px 12px;background:var(--c-input);border-radius:var(--radius-sm);position:relative;
    transition:background .15s;cursor:pointer;
}
.trade-item:active{background:#e9ecef}
.trade-badge{font-size:11px;font-weight:700;padding:2px 8px;border-radius:4px;min-width:32px;text-align:center;letter-spacing:.5px;margin-top:2px}
.trade-badge.buy{background:var(--c-red-bg);color:var(--c-red)}
.trade-badge.sell{background:var(--c-green-bg);color:var(--c-green)}
.trade-body{flex:1;min-width:0}
.trade-body .t-price{font-size:14px;font-weight:600}
.trade-body .t-meta{font-size:11px;color:var(--c-text3);margin-top:1px}
.trade-body .t-fee{font-size:11px;color:var(--c-text2);margin-top:2px;display:flex;gap:6px;flex-wrap:wrap}
.trade-body .t-fee span{display:inline-flex;align-items:center;gap:2px}
.trade-right{text-align:right;flex-shrink:0;margin-top:2px}
.trade-right .t-amount{font-size:14px;font-weight:700}
.trade-right .t-amount.buy{color:var(--c-red)}
.trade-right .t-amount.sell{color:var(--c-green)}
.trade-right .t-fee-total{font-size:10px;color:var(--c-orange);margin-top:1px}
.trade-del{position:absolute;top:2px;right:4px;color:var(--c-text3);font-size:13px;width:22px;height:22px;display:flex;align-items:center;justify-content:center;border-radius:50%}
.trade-del:active{color:var(--c-red);background:var(--c-red-bg)}

/* ===== Empty State ===== */
.empty{display:flex;flex-direction:column;align-items:center;padding:28px 14px;color:var(--c-text3)}
.empty svg{margin-bottom:8px}
.empty p{font-size:14px;color:var(--c-text2)}
.empty span{font-size:12px;margin-top:2px}

/* ===== Result Card ===== */
.card-result{background:var(--c-dark)}
.result-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px;padding:0 14px 14px}
.r-item{background:rgba(255,255,255,.08);border-radius:var(--radius-sm);padding:10px 8px;text-align:center}
.r-item.hero{background:rgba(255,255,255,.14)}
.r-label{display:block;font-size:10px;color:rgba(255,255,255,.55);margin-bottom:2px;letter-spacing:.3px}
.r-value{display:block;font-size:17px;font-weight:700;color:#fff}
.r-item.hero .r-value{font-size:20px;color:#748ffc}
.r-unit{font-size:10px;color:rgba(255,255,255,.4)}

/* ===== Stats Card ===== */
.card-stats{border:1.5px solid var(--c-border)}
.stats-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px;padding:0 14px 14px}
.stat-item{background:var(--c-input);border-radius:var(--radius-sm);padding:10px 8px;text-align:center}
.stat-label{display:block;font-size:10px;color:var(--c-text3);margin-bottom:2px;letter-spacing:.3px}
.stat-value{display:block;font-size:15px;font-weight:700;color:var(--c-text)}
.stat-value.warn{color:var(--c-orange)}
.stat-value.profit{color:var(--c-green)}
.stat-value.loss{color:var(--c-red)}
.stat-unit{font-size:10px;color:var(--c-text3)}

/* ===== Profit Card ===== */
.card-profit{border:1.5px solid var(--c-border)}
.profit-result{margin-top:10px;display:flex;flex-direction:column;gap:6px}
.p-row{display:flex;align-items:center;justify-content:space-between;padding:8px 12px;background:var(--c-input);border-radius:var(--radius-sm)}
.p-row.main{padding:12px}
.p-label{font-size:13px;color:var(--c-text2)}
.p-val{text-align:right}
.p-value{font-size:17px;font-weight:700;color:var(--c-text)}
.p-row.main .p-value{font-size:24px}
.p-value.profit{color:var(--c-green)}
.p-value.loss{color:var(--c-red)}
.p-value.hl{color:var(--c-primary)}
.p-unit{font-size:11px;color:var(--c-text3);margin-left:2px}

/* ===== Fee Preview (in modal) ===== */
.fee-preview{margin-top:10px;background:var(--c-input);border-radius:var(--radius-sm);padding:10px 12px}
.fp-title{font-size:12px;font-weight:600;color:var(--c-text2);margin-bottom:6px}
.fp-grid{display:grid;grid-template-columns:1fr 1fr;gap:4px 12px}
.fp-item{display:flex;justify-content:space-between;font-size:12px}
.fp-item.total{border-top:1px solid var(--c-border);padding-top:4px;margin-top:2px;grid-column:span 2;font-weight:600}
.fp-label{color:var(--c-text3)}
.fp-val{color:var(--c-text);font-weight:500}
.fp-item.total .fp-val{color:var(--c-orange)}

/* ===== Fee Detail Modal ===== */
.fd-trade{padding:12px 0;border-bottom:1px solid var(--c-border)}
.fd-trade:last-child{border-bottom:none}
.fd-trade-head{display:flex;align-items:center;gap:8px;margin-bottom:8px}
.fd-badge{font-size:11px;font-weight:700;padding:2px 8px;border-radius:4px}
.fd-badge.buy{background:var(--c-red-bg);color:var(--c-red)}
.fd-badge.sell{background:var(--c-green-bg);color:var(--c-green)}
.fd-trade-info{font-size:13px;font-weight:600}
.fd-grid{display:grid;grid-template-columns:1fr 1fr;gap:4px 16px;font-size:12px}
.fd-item{display:flex;justify-content:space-between}
.fd-item .fd-k{color:var(--c-text3)}
.fd-item .fd-v{font-weight:500;color:var(--c-text)}
.fd-total{display:flex;justify-content:space-between;font-size:13px;font-weight:600;padding-top:6px;margin-top:6px;border-top:1px solid var(--c-border)}
.fd-total .fd-v{color:var(--c-orange)}

/* ===== Action Bar ===== */
.action-bar{display:flex;align-items:center;gap:10px;margin-bottom:10px;padding:0 2px}

/* ===== History ===== */
.history-list{display:flex;flex-direction:column;gap:6px;padding:0 14px 14px}
.history-item{display:flex;align-items:center;gap:10px;padding:10px 12px;background:var(--c-input);border-radius:var(--radius-sm);cursor:pointer;transition:background .15s}
.history-item:active{background:#e9ecef}
.h-info{flex:1}
.h-info .h-name{font-size:14px;font-weight:600}
.h-info .h-code{font-size:11px;color:var(--c-text3)}
.h-summary{text-align:right}
.h-summary .h-shares{font-size:13px;font-weight:600}
.h-summary .h-cost{font-size:11px;color:var(--c-text3)}
.h-del{color:var(--c-text3);font-size:14px;padding:4px}
.h-del:active{color:var(--c-red)}

/* ===== Overlay / Sheet ===== */
.overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:200;align-items:flex-end;justify-content:center}
.overlay.active{display:flex}
.sheet{background:var(--c-card);border-radius:16px 16px 0 0;width:100%;max-width:420px;max-height:85vh;overflow-y:auto;animation:slideUp .25s cubic-bezier(.4,0,.2,1);padding-bottom:env(safe-area-inset-bottom,0)}
@keyframes slideUp{from{transform:translateY(100%)}to{transform:translateY(0)}}
.sheet-handle{width:36px;height:4px;background:#d0d0d0;border-radius:2px;margin:8px auto 0}
.sheet-head{display:flex;align-items:center;justify-content:space-between;padding:12px 16px 8px}
.sheet-head h3{font-size:16px;font-weight:600}
.sheet-close{color:var(--c-text3);font-size:22px;width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:50%}
.sheet-close:active{background:var(--c-input)}
.sheet-body{padding:0 16px 16px}
.sheet-foot{display:flex;gap:10px;padding:12px 16px;border-top:1px solid var(--c-border)}

/* ===== Type Switch ===== */
.type-switch{display:flex;gap:8px;margin-bottom:14px}
.ts-btn{flex:1;cursor:pointer;text-align:center}
.ts-btn input{display:none}
.ts-btn span{display:block;padding:10px;border:2px solid var(--c-border);border-radius:var(--radius-sm);font-size:15px;font-weight:600;color:var(--c-text3);transition:all .2s}
.ts-btn.buy.active span{border-color:var(--c-red);background:var(--c-red-bg);color:var(--c-red)}
.ts-btn.sell.active span{border-color:var(--c-green);background:var(--c-green-bg);color:var(--c-green)}

/* ===== Toast ===== */
.toast{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);background:rgba(26,26,46,.82);color:#fff;padding:8px 20px;border-radius:8px;font-size:13px;font-weight:500;z-index:999;animation:fadeIn .15s ease;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px)}
@keyframes fadeIn{from{opacity:0;transform:translate(-50%,-50%) scale(.95)}to{opacity:1;transform:translate(-50%,-50%) scale(1)}}

@media(min-width:420px){.main{padding:16px 16px 72px}}