:root {
    --brand: #1a56db;
    --ink: #111827;
    --ink-soft: #4b5563;
    --border: #e5e7eb;
    --bg: #f7f8fa;
    --card: #ffffff;
    --green: #067647;
    --red: #b42318;
    --amber: #b54708;
}

[data-theme="dark"] {
    --brand: #4c8dff;
    --ink: #e5e7eb;
    --ink-soft: #9aa4b2;
    --border: #2a2f3a;
    --bg: #0f1319;
    --card: #171b23;
    --green: #3ecf8e;
    --red: #ef6a6a;
    --amber: #e2a03f;
}

[data-theme="dark"] body { color: var(--ink); }
[data-theme="dark"] .sidebar { background: #0a0c10; }
[data-theme="dark"] .badge-buy { background: #0e3324; }
[data-theme="dark"] .badge-sell { background: #3a1717; }
[data-theme="dark"] .badge-open { background: #3a2c0e; }
[data-theme="dark"] .badge-settled { background: #0e3324; }
[data-theme="dark"] .badge-cancelled { background: #23262e; color: var(--ink-soft); }
[data-theme="dark"] tr:hover td { background: #1c212b; }
[data-theme="dark"] .flash-success { background: #0e3324; }
[data-theme="dark"] .flash-danger { background: #3a1717; }
[data-theme="dark"] .flash-info { background: #10233d; color: #8db4f5; }
[data-theme="dark"] .filter-bar input, [data-theme="dark"] .filter-bar select,
[data-theme="dark"] form.stacked input, [data-theme="dark"] form.stacked select,
[data-theme="dark"] form.stacked textarea { background: #1a1f28; color: var(--ink); }
[data-theme="dark"] .stat-value, [data-theme="dark"] h1, [data-theme="dark"] h2 { color: var(--ink); }
[data-theme="dark"] .login-card { background: var(--card); }
[data-theme="dark"] #nominal_amount, [data-theme="dark"] #hedge_nominal_amount, [data-theme="dark"] #fee_preview {
    background: #1a1f28 !important;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--ink);
    font-size: 14px;
}

a { color: var(--brand); text-decoration: none; }

.app-shell { display: flex; min-height: 100vh; }

.sidebar {
    width: 220px;
    background: #111827;
    color: #e5e7eb;
    display: flex;
    flex-direction: column;
    padding: 20px 0;
    flex-shrink: 0;
}
.sidebar-brand {
    font-weight: 700;
    font-size: 16px;
    padding: 0 20px 20px;
    color: #fff;
    border-bottom: 1px solid #262f3d;
    margin-bottom: 10px;
}
.nav-section {
    padding: 16px 20px 4px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #6b7280;
}
.nav-link {
    display: block;
    padding: 9px 20px;
    color: #cbd5e1;
    font-size: 13.5px;
}
.nav-link:hover { background: #1f2937; color: #fff; }
.nav-link.active { background: var(--brand); color: #fff; }
.sidebar-footer { margin-top: auto; padding-top: 16px; border-top: 1px solid #262f3d; }
.sidebar-user { padding: 9px 20px 2px; font-size: 12.5px; color: #9ca3af; }
.role-tag {
    background: #262f3d; color: #9ca3af; padding: 1px 6px; border-radius: 4px;
    font-size: 10px; margin-left: 4px; vertical-align: middle;
}

.content { flex: 1; padding: 28px 32px; max-width: 1400px; }

h1 { font-size: 20px; margin: 0 0 4px; }
h2 { font-size: 15px; margin: 0 0 12px; color: var(--ink); }
.page-header { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: 20px; }
.subtitle { color: var(--ink-soft); font-size: 13px; margin: 0; }

.btn {
    display: inline-block; background: var(--brand); color: #fff; border: none;
    padding: 8px 16px; border-radius: 6px; font-size: 13.5px; cursor: pointer; font-weight: 500;
}
.btn:hover { opacity: 0.9; }
.btn-secondary { background: var(--card); color: var(--ink); border: 1px solid var(--border); }
.btn-disabled {
    display: inline-flex; align-items: center; gap: 6px;
    background: var(--border); color: var(--ink-soft); border: 1px solid var(--border);
    padding: 8px 16px; border-radius: 6px; font-size: 13.5px; font-weight: 500;
    cursor: not-allowed; opacity: 0.75;
}

.card {
    background: var(--card); border: 1px solid var(--border); border-radius: 8px;
    padding: 18px 20px; margin-bottom: 20px;
}

.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 20px; }
.stat-card { background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 16px 18px; }
.stat-label { font-size: 12px; color: var(--ink-soft); text-transform: uppercase; letter-spacing: 0.03em; }
.stat-value { font-size: 22px; font-weight: 700; margin-top: 4px; }
.stat-sub { font-size: 12px; color: var(--ink-soft); margin-top: 2px; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--ink-soft); font-weight: 600; font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.03em; }
tr:hover td { background: #fafbfc; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 11px; font-weight: 600; }
.badge-buy { background: #dcfce7; color: var(--green); }
.badge-sell { background: #fee2e2; color: var(--red); }
.badge-open { background: #fef3c7; color: var(--amber); }
.badge-settled { background: #dcfce7; color: var(--green); }
.badge-cancelled { background: #f3f4f6; color: var(--ink-soft); }

.filter-bar { display: flex; gap: 10px; align-items: end; margin-bottom: 18px; flex-wrap: wrap; }
.filter-bar label { display: block; font-size: 11.5px; color: var(--ink-soft); margin-bottom: 4px; }
.filter-bar input, .filter-bar select { padding: 6px 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px; }

form.stacked label { display: block; font-size: 12.5px; color: var(--ink-soft); margin: 12px 0 4px; font-weight: 500; }
form.stacked input, form.stacked select, form.stacked textarea {
    width: 100%; padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 13.5px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }

.flash-stack { margin-bottom: 16px; }
.flash-stack-standalone { max-width: 400px; margin: 20px auto 0; }
.flash { padding: 10px 14px; border-radius: 6px; font-size: 13.5px; margin-bottom: 8px; }
.flash-success { background: #dcfce7; color: var(--green); }
.flash-danger { background: #fee2e2; color: var(--red); }
.flash-info { background: #dbeafe; color: #1e40af; }

.login-wrap { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-card { background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 32px; width: 340px; }
.login-card h1 { text-align: center; margin-bottom: 4px; }
.login-card .subtitle { text-align: center; margin-bottom: 20px; }

.help-text { font-size: 12px; color: var(--ink-soft); margin-top: 4px; }
.section-divider { border: none; border-top: 1px solid var(--border); margin: 24px 0; }
.empty-state { color: var(--ink-soft); font-size: 13px; padding: 20px 0; text-align: center; }