:root {
    --bg: #0c121b;
    --panel: #141e2b;
    --panel-2: #182536;
    --line: #273548;
    --text: #f6f8fb;
    --muted: #8c9aae;
    --gold: #f2bd55;
    --green: #21c997;
    --red: #ff6678;
    --radius: 18px;
}

* { box-sizing: border-box; }
html { color-scheme: dark; }
body {
    margin: 0;
    min-height: 100vh;
    background: radial-gradient(circle at 10% 0, #17263a 0, var(--bg) 36rem);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
button { cursor: pointer; }

.topbar {
    max-width: 1180px;
    margin: 0 auto;
    padding: 24px 20px 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.topbar h1 { margin: 3px 0 0; font-size: clamp(22px, 4vw, 32px); }
.eyebrow { color: var(--muted); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; }
.admin-link, .admin-topbar nav a {
    border: 1px solid var(--line);
    background: rgba(20, 30, 43, .8);
    border-radius: 999px;
    padding: 10px 15px;
    font-size: 14px;
}
.container { width: min(1140px, calc(100% - 32px)); margin: 0 auto 64px; }
.panel, .snapshot-card {
    background: rgba(20, 30, 43, .95);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: 0 18px 45px rgba(0, 0, 0, .18);
}
.snapshot-card {
    padding: 18px 22px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    border-color: rgba(242, 189, 85, .35);
    background: linear-gradient(135deg, rgba(242, 189, 85, .13), rgba(20, 30, 43, .96) 52%);
}
.snapshot-card strong { display: block; margin-top: 5px; font-size: 20px; }
.snapshot-values { display: flex; gap: 34px; }
.snapshot-values div { display: grid; grid-template-columns: auto auto; column-gap: 7px; align-items: baseline; }
.snapshot-values span { grid-column: 1 / -1; color: var(--muted); font-size: 12px; }
.snapshot-values b { color: var(--gold); font-size: 22px; }
.snapshot-values small { color: var(--muted); }
.market-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 18px; }
.market-panel { overflow: hidden; }
.panel-head, .section-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 20px 22px 13px;
}
.panel-head h2, .section-title h2 { margin: 4px 0 0; font-size: 19px; }
.live-price { text-align: right; }
.live-price b { display: block; color: var(--gold); font-size: 24px; }
.live-price small { color: var(--muted); }
.chart-wrap { height: 290px; position: relative; }
.live-chart { width: 100%; height: 100%; }
.live-chart table { font-family: inherit !important; }
.chart-loading {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    color: var(--muted);
    background: var(--panel);
}
.chart-loading[hidden] { display: none; }
.error-text { color: var(--red); padding: 24px; text-align: center; }
.market-foot { padding: 11px 18px 15px; display: flex; justify-content: space-between; color: var(--muted); font-size: 11px; }
.calculator { margin-top: 18px; padding-bottom: 24px; }
.trade-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; padding: 0 22px 18px; }
.trade-side { overflow: hidden; border: 1px solid var(--line); border-radius: 16px; background: rgba(15, 24, 36, .72); }
.buyer-side { border-top: 3px solid var(--gold); }
.seller-side { border-top: 3px solid #63a8ff; }
.side-title { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 16px 16px 7px; }
.side-title h3 { margin: 4px 0 0; }
.trade-side .form-grid { padding-left: 16px; padding-right: 16px; }
.trade-side .formula-strip { margin-left: 16px; margin-right: 16px; }
.trade-side .grams-head { padding-left: 16px; padding-right: 16px; }
.trade-side .grams-head h4 { margin: 0; }
.trade-side .grams-list { padding-left: 16px; padding-right: 16px; }
.side-results { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; padding: 4px 16px 16px; }
.side-results .balance-box { margin: 0; padding: 12px; }
.side-results .balance-box strong { font-size: 20px; }
.profit-box { margin: 0 22px 18px; padding: 20px; border: 1px solid var(--line); border-radius: 15px; text-align: center; background: #101a27; }
.profit-box span { color: var(--muted); font-size: 12px; }
.profit-box strong { display: block; margin: 7px 0 3px; color: var(--gold); font-size: clamp(28px, 5vw, 40px); }
.profit-box p { margin: 0; font-weight: 700; }
.profit-box.positive { border-color: rgba(33, 201, 151, .5); background: rgba(33, 201, 151, .08); }
.profit-box.positive strong, .profit-box.positive p { color: var(--green); }
.profit-box.loss { border-color: rgba(255, 102, 120, .5); background: rgba(255, 102, 120, .08); }
.profit-box.loss strong, .profit-box.loss p { color: var(--red); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding: 8px 22px; }
label { display: block; color: #c8d0db; font-size: 13px; }
input, textarea {
    width: 100%;
    margin-top: 7px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: #0f1824;
    color: var(--text);
    padding: 13px 14px;
    outline: none;
}
input { min-height: 48px; }
input:focus, textarea:focus { border-color: var(--gold); box-shadow: 0 0 0 3px rgba(242, 189, 85, .12); }
.button {
    border: 1px solid var(--line);
    border-radius: 11px;
    background: var(--panel-2);
    color: var(--text);
    min-height: 42px;
    padding: 9px 15px;
}
.button.primary { background: var(--gold); border-color: var(--gold); color: #241b09; font-weight: 700; }
.button.ghost { background: transparent; }
.button.small { min-height: 36px; padding: 7px 12px; }
.button.full { width: 100%; display: block; text-align: center; }
.formula-strip {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    margin: 16px 22px;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--line);
}
.formula-strip div { padding: 14px; background: #111a27; }
.formula-strip span { display: block; color: var(--muted); font-size: 12px; }
.formula-strip b { display: block; margin-top: 6px; font-size: 17px; }
.grams-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 8px 22px; }
.grams-head h3 { margin: 0; font-size: 15px; }
.grams-list { display: grid; gap: 9px; padding: 0 22px 12px; }
.gram-row { display: grid; grid-template-columns: 1fr 46px; gap: 8px; }
.gram-row input { margin: 0; }
.remove-gram { border: 1px solid var(--line); border-radius: 11px; background: #211821; color: var(--red); font-size: 24px; }
.payment-row { align-items: stretch; }
.total-box { border: 1px solid var(--line); border-radius: 12px; background: #101a27; padding: 12px 15px; }
.total-box span, .total-box small { display: block; color: var(--muted); font-size: 12px; }
.total-box b { display: block; margin: 5px 0; color: var(--gold); font-size: 21px; }
.balance-box { margin: 18px 22px; padding: 20px; border-radius: 15px; text-align: center; border: 1px solid var(--line); background: #101a27; }
.balance-box span { display: block; color: var(--muted); font-size: 12px; }
.balance-box strong { display: block; margin: 7px 0 3px; font-size: clamp(26px, 6vw, 38px); }
.balance-box p { margin: 0; font-weight: 700; }
.balance-box.positive { border-color: rgba(255, 102, 120, .5); background: rgba(255, 102, 120, .08); }
.balance-box.positive strong, .balance-box.positive p { color: var(--red); }
.balance-box.negative { border-color: rgba(33, 201, 151, .5); background: rgba(33, 201, 151, .08); }
.balance-box.negative strong, .balance-box.negative p { color: var(--green); }
.save-trigger { width: calc(100% - 44px) !important; margin: 0 22px; min-height: 52px; }
.calculator-note { color: var(--muted); font-size: 12px; text-align: center; margin: 10px 22px 0; }

dialog { width: min(520px, calc(100% - 24px)); border: 1px solid var(--line); border-radius: 18px; background: var(--panel); color: var(--text); padding: 20px; }
dialog::backdrop { background: rgba(0, 0, 0, .72); backdrop-filter: blur(4px); }
dialog label { margin-top: 13px; }
.dialog-head { display: flex; align-items: center; justify-content: space-between; }
.dialog-head h2 { margin: 0; }
.dialog-head button { border: 0; background: transparent; color: var(--muted); font-size: 27px; }
.dialog-summary { display: grid; grid-template-columns: 1fr auto; gap: 9px 15px; margin: 17px 0; padding: 14px; background: #0f1824; border-radius: 12px; }
.dialog-summary span { color: var(--muted); }
.confirm-check { display: grid; grid-template-columns: 22px 1fr; align-items: start; gap: 9px; padding: 13px; margin-top: 15px; border: 1px solid rgba(242, 189, 85, .35); border-radius: 12px; background: rgba(242, 189, 85, .07); }
.confirm-check input { width: 20px; min-height: 20px; margin: 0; }
.confirm-check span { line-height: 1.5; }

.auth-page { display: grid; place-items: center; padding: 24px; }
.auth-card { width: min(430px, 100%); padding: 28px; border: 1px solid var(--line); border-radius: 20px; background: var(--panel); box-shadow: 0 25px 70px rgba(0,0,0,.35); }
.auth-card h1 { text-align: center; margin: 10px 0 24px; }
.auth-card label { margin-top: 14px; }
.auth-card .button { margin-top: 20px; }
.brand-mark { width: 52px; height: 52px; display: grid; place-items: center; margin: 0 auto; border-radius: 15px; background: var(--gold); color: #251b08; font-size: 25px; font-weight: 800; }
.back-link { display: block; margin-top: 22px; color: var(--muted); text-align: center; font-size: 13px; }
.alert { padding: 12px 14px; margin: 0 0 16px; border-radius: 11px; }
.alert.error { color: #ffdce0; background: rgba(255,102,120,.12); border: 1px solid rgba(255,102,120,.35); }
.alert.success { color: #ccf7ea; background: rgba(33,201,151,.12); border: 1px solid rgba(33,201,151,.35); }
.field-help { display: block; color: var(--muted); margin-top: 5px; }

.admin-topbar nav { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.snapshot-refresh { display: flex; justify-content: flex-end; margin: 0 0 12px; }
.manual-snapshot { display: grid; grid-template-columns: minmax(220px, 360px) auto; align-items: end; justify-content: end; gap: 10px; margin: 0 0 18px; }
.admin-summary { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 18px; }
.admin-summary div { padding: 18px; border: 1px solid var(--line); border-radius: 15px; background: var(--panel); }
.admin-summary span, .admin-summary small { color: var(--muted); }
.admin-summary b { display: block; margin: 4px 0; font-size: 26px; }
.admin-summary .debt-me b { color: var(--red); }
.admin-summary .debt-them b { color: var(--green); }
.admin-summary .profit-summary b { color: var(--gold); }
.bill-panel { padding: 20px; }
.month-filter { display: flex; align-items: end; gap: 10px; margin-bottom: 18px; }
.month-filter label { flex: 1; max-width: 260px; }
.bill-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.bill-card { padding: 17px; border: 1px solid var(--line); border-radius: 15px; background: #101925; }
.bill-card.cancelled { opacity: .55; }
.bill-card-head { display: flex; justify-content: space-between; gap: 10px; }
.bill-card h3 { margin: 5px 0 0; }
.status-pill { align-self: start; padding: 5px 8px; border-radius: 999px; background: rgba(33,201,151,.12); color: var(--green); font-size: 11px; }
.cancelled .status-pill { background: rgba(140,154,174,.12); color: var(--muted); }
.bill-result { display: flex; align-items: baseline; justify-content: space-between; margin: 15px 0; padding: 12px; border-radius: 11px; }
.bill-result.positive { background: rgba(255,102,120,.09); color: var(--red); }
.bill-result.negative { background: rgba(33,201,151,.09); color: var(--green); }
.bill-result b { font-size: 20px; }
.bill-profit { display: flex; align-items: baseline; justify-content: space-between; margin: 10px 0 15px; padding: 12px; border-radius: 11px; background: rgba(33,201,151,.09); color: var(--green); }
.bill-profit.loss { background: rgba(255,102,120,.09); color: var(--red); }
.bill-side-title { margin: 14px 0 8px; color: var(--gold); font-size: 13px; }
.bill-details { display: grid; grid-template-columns: 1fr 1fr; gap: 9px 16px; margin: 0; }
.bill-details div { border-bottom: 1px solid rgba(39,53,72,.65); padding-bottom: 7px; }
.bill-details dt { color: var(--muted); font-size: 11px; }
.bill-details dd { margin: 3px 0 0; font-size: 13px; }
.bill-note { padding: 10px; border-radius: 9px; background: var(--panel-2); font-size: 13px; }
.bill-meta { color: var(--muted); font-size: 10px; margin: 13px 0 9px; }
.bill-card form .button { min-height: 37px; font-size: 12px; }
.empty-state { padding: 50px 10px; color: var(--muted); text-align: center; }

@media (max-width: 760px) {
    .topbar { padding: 18px 16px 12px; align-items: flex-start; }
    .container { width: min(100% - 20px, 620px); margin-bottom: 34px; }
    .admin-link { padding: 9px 12px; }
    .snapshot-card { align-items: flex-start; padding: 16px; }
    .snapshot-values { gap: 14px; }
    .snapshot-values b { font-size: 18px; }
    .market-grid, .bill-list, .trade-grid { grid-template-columns: 1fr; }
    .chart-wrap { height: 260px; }
    .form-grid { grid-template-columns: 1fr; }
    .formula-strip { grid-template-columns: 1fr; }
    .formula-strip div { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
    .formula-strip b { margin: 0; text-align: right; }
    .section-title { align-items: flex-start; }
    .section-title .button { max-width: 135px; }
    .admin-topbar { display: block; }
    .admin-topbar nav { justify-content: flex-start; margin-top: 14px; }
    .admin-summary { grid-template-columns: 1fr 1fr; }
    .admin-summary div:first-child { grid-column: 1 / -1; }
    .side-results { grid-template-columns: 1fr; }
    .manual-snapshot { grid-template-columns: 1fr; justify-content: stretch; }
}

@media (max-width: 430px) {
    .snapshot-card { display: block; }
    .snapshot-values { margin-top: 15px; justify-content: space-between; }
    .snapshot-values div { flex: 1; }
    .panel-head, .section-title { padding: 17px 15px 10px; }
    .form-grid, .grams-list { padding-left: 15px; padding-right: 15px; }
    .formula-strip, .balance-box { margin-left: 15px; margin-right: 15px; }
    .grams-head { padding-left: 15px; padding-right: 15px; }
    .save-trigger { width: calc(100% - 30px) !important; margin-left: 15px; margin-right: 15px; }
    .trade-grid { padding-left: 15px; padding-right: 15px; }
    .profit-box { margin-left: 15px; margin-right: 15px; }
    .live-price b { font-size: 20px; }
}