:root {
    --bh-bg: #13141C;
    --bh-panel: #181927;
    --bh-card: #1C1E2A;
    --bh-card-2: #1E2132;
    --bh-border: rgba(255,255,255,0.06);
    --bh-border-2: rgba(255,255,255,0.09);
    --bh-text: #E2E4F0;
    --bh-text-2: #C8CCE0;
    --bh-text-3: #7A7F9E;
    --bh-text-4: #5A5F7A;
    --bh-text-5: #3D4260;
    --bh-primary: #5C6BFF;
    --bh-primary-2: #6B79FF;
    --bh-accent: #8B5CF6;
    --bh-success: #4ADE80;
    --bh-warn: #FBB040;
    --bh-danger: #F87171;
    --bh-info: #22D3EE;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
    font-family: 'Space Grotesk', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
    background: var(--bh-bg);
    color: var(--bh-text);
    min-height: 100vh;
}

a, a:hover { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; }

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.09); border-radius: 3px; }

/* MudBlazor overrides for dark BillHub theme */
.mud-application-layout, .mud-main-content {
    background: var(--bh-bg) !important;
    color: var(--bh-text) !important;
}
.mud-input.mud-input-outlined .mud-input-outlined-border { border-color: var(--bh-border-2) !important; }
.mud-input-label { color: var(--bh-text-3) !important; }
.mud-input-slot input, .mud-input-slot textarea { color: var(--bh-text) !important; }
.mud-select-input input { color: var(--bh-text) !important; }
.mud-picker-inline .mud-input-outlined-border { border-color: var(--bh-border-2) !important; }

.bh-card {
    background: var(--bh-card);
    border: 1px solid var(--bh-border);
    border-radius: 12px;
    padding: 20px;
}
.bh-card-elevated {
    background: var(--bh-card-2);
    border: 1px solid var(--bh-border);
    border-radius: 14px;
    padding: 24px;
}

.bh-h1 { font-size: 21px; font-weight: 700; color: var(--bh-text); letter-spacing: -.4px; margin-bottom: 3px; }
.bh-h2 { font-size: 17px; font-weight: 700; color: var(--bh-text); letter-spacing: -.2px; }
.bh-subtle { font-size: 13.5px; color: var(--bh-text-4); }
.bh-hint { font-size: 12px; color: var(--bh-text-4); }
.bh-label { font-size: 11px; font-weight: 700; color: var(--bh-text-4); letter-spacing: .05em; text-transform: uppercase; }
.bh-amount-lg { font-size: 30px; font-weight: 700; letter-spacing: -1px; font-variant-numeric: tabular-nums; }
.bh-amount { font-size: 20px; font-weight: 700; letter-spacing: -.4px; font-variant-numeric: tabular-nums; color: var(--bh-text); }
.bh-mono { font-variant-numeric: tabular-nums; }

.bh-badge {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 3px 8px; border-radius: 100px;
    font-size: 11px; font-weight: 600; line-height: 1.6;
}
.bh-badge::before { content: ''; width: 5px; height: 5px; border-radius: 50%; flex-shrink: 0; }
.bh-badge-paid { background: rgba(74,222,128,0.12); color: var(--bh-success); }
.bh-badge-paid::before { background: var(--bh-success); }
.bh-badge-due { background: rgba(251,176,64,0.12); color: var(--bh-warn); }
.bh-badge-due::before { background: var(--bh-warn); }
.bh-badge-overdue { background: rgba(248,113,113,0.12); color: var(--bh-danger); }
.bh-badge-overdue::before { background: var(--bh-danger); }
.bh-badge-draft { background: rgba(148,163,184,0.09); color: #94A3B8; }
.bh-badge-draft::before { background: #94A3B8; }

.bh-btn-primary {
    background: var(--bh-primary); color: #fff;
    padding: 8px 16px; border-radius: 8px;
    font-size: 13px; font-weight: 600;
    display: inline-flex; align-items: center; gap: 6px;
    cursor: pointer; border: none; transition: background .15s;
    text-decoration: none;
}
.bh-btn-primary:hover { background: var(--bh-primary-2); color: #fff; }
.bh-btn-secondary {
    background: rgba(255,255,255,0.05); color: var(--bh-text-2);
    padding: 8px 14px; border-radius: 8px;
    font-size: 13px; font-weight: 500;
    border: 1px solid var(--bh-border-2);
    display: inline-flex; align-items: center; gap: 6px;
    cursor: pointer; text-decoration: none;
}
.bh-btn-secondary:hover { background: rgba(255,255,255,0.09); color: var(--bh-text); }
.bh-btn-ghost {
    background: none; border: none; color: var(--bh-text-3);
    padding: 4px 8px; border-radius: 6px; cursor: pointer;
    font-size: 12.5px; font-weight: 500;
    display: inline-flex; align-items: center; gap: 5px;
}
.bh-btn-ghost:hover { color: var(--bh-text-2); background: rgba(255,255,255,0.05); }
.bh-btn-danger {
    background: rgba(248,113,113,0.12); color: var(--bh-danger);
    padding: 8px 14px; border-radius: 8px;
    font-size: 13px; font-weight: 600;
    border: 1px solid rgba(248,113,113,0.25);
    display: inline-flex; align-items: center; gap: 6px;
    cursor: pointer;
}

.bh-input {
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--bh-border-2);
    border-radius: 8px;
    color: var(--bh-text);
    padding: 9px 13px; font-size: 14px; width: 100%;
    transition: border-color .15s;
    font-family: inherit;
}
.bh-input:focus { border-color: var(--bh-primary); background: rgba(92,107,255,0.05); outline: none; }
.bh-input::placeholder { color: #4A4F6A; }
.bh-input-label { font-size: 12px; font-weight: 600; color: var(--bh-text-3); margin-bottom: 6px; display: block; letter-spacing: .03em; }

/* Layout */
.bh-shell { display: flex; height: 100vh; overflow: hidden; }
.bh-sidebar {
    width: 236px; flex-shrink: 0;
    background: var(--bh-panel);
    border-right: 1px solid var(--bh-border);
    display: flex; flex-direction: column;
    transition: width .22s cubic-bezier(.4,0,.2,1);
    overflow: hidden;
}
.bh-sidebar-logo {
    height: 62px; padding: 0 14px;
    display: flex; align-items: center; gap: 10px;
    border-bottom: 1px solid var(--bh-border); flex-shrink: 0;
}
.bh-logo-mark {
    width: 30px; height: 30px; flex-shrink: 0;
    background: linear-gradient(135deg, var(--bh-primary), var(--bh-accent));
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
}
.bh-logo-text {
    font-size: 17px; font-weight: 700; letter-spacing: -.2px;
    color: var(--bh-text);
}
.bh-nav-group {
    font-size: 10px; font-weight: 700; color: var(--bh-text-5);
    letter-spacing: .1em; text-transform: uppercase;
    padding: 10px 8px 5px; display: block;
}
.bh-nav-item {
    display: flex; align-items: center; gap: 10px;
    padding: 8px 10px; border-radius: 8px; cursor: pointer;
    color: var(--bh-text-3); font-size: 13.5px; font-weight: 500;
    transition: background .15s, color .15s;
    white-space: nowrap; user-select: none; text-decoration: none;
    border: none; background: none; width: 100%;
    text-align: left; font-family: inherit;
}
.bh-nav-item:hover { background: rgba(255,255,255,0.05); color: var(--bh-text-2); }
.bh-nav-item.active { background: rgba(92,107,255,0.14); color: #8B9AFF; }
.bh-nav-icon { flex-shrink: 0; width: 18px; height: 18px; display: flex; align-items: center; justify-content: center; }

.bh-main { flex: 1; display: flex; flex-direction: column; min-width: 0; overflow: hidden; }
.bh-topbar {
    height: 62px; flex-shrink: 0;
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 24px; border-bottom: 1px solid var(--bh-border);
    background: var(--bh-panel);
}
.bh-topbar-search {
    display: flex; align-items: center; gap: 10px;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--bh-border);
    border-radius: 8px; padding: 6px 12px;
    min-width: 260px; color: var(--bh-text-3); font-size: 13px;
    cursor: pointer;
}
.bh-topbar-user {
    display: flex; align-items: center; gap: 10px; padding: 4px 10px;
    border-radius: 8px; cursor: pointer; color: var(--bh-text-2);
    font-size: 13px; font-weight: 500;
}
.bh-topbar-user:hover { background: rgba(255,255,255,0.05); }
.bh-avatar {
    width: 30px; height: 30px; border-radius: 50%;
    background: linear-gradient(135deg, var(--bh-primary), var(--bh-accent));
    display: flex; align-items: center; justify-content: center;
    font-size: 12px; font-weight: 700; color: #fff;
}

/* User menu dropdown */
.bh-user-menu { position: relative; }
.bh-user-menu > button {
    background: none; border: none; font-family: inherit;
}
.bh-user-menu-dropdown {
    position: absolute; top: calc(100% + 6px); right: 0;
    min-width: 220px;
    background: var(--bh-card-2);
    border: 1px solid var(--bh-border-2);
    border-radius: 10px;
    box-shadow: 0 12px 32px rgba(0,0,0,0.35);
    padding: 6px;
    display: none;
    z-index: 200;
}
.bh-user-menu[data-open="true"] .bh-user-menu-dropdown {
    display: block;
    animation: bh-menu-in .14s ease;
}
@keyframes bh-menu-in {
    from { opacity: 0; transform: translateY(-4px); }
    to   { opacity: 1; transform: translateY(0); }
}
.bh-user-menu-header {
    padding: 10px 12px 8px;
    border-bottom: 1px solid var(--bh-border);
    margin-bottom: 4px;
}
.bh-user-menu-item {
    display: flex; align-items: center; gap: 10px;
    padding: 9px 12px;
    font-size: 13px; color: var(--bh-text-2);
    border-radius: 6px;
    text-decoration: none; cursor: pointer;
    background: none; border: none; font-family: inherit;
    width: 100%; text-align: left;
}
.bh-user-menu-item:hover {
    background: rgba(92,107,255,0.10);
    color: var(--bh-text);
}
.bh-user-menu-danger { color: var(--bh-danger); }
.bh-user-menu-danger:hover {
    background: rgba(248,113,113,0.10);
    color: var(--bh-danger);
}
.bh-user-menu-divider {
    height: 1px; background: var(--bh-border);
    margin: 4px 0;
}
.bh-user-menu-form { margin: 0; padding: 0; }

.bh-page { flex: 1; overflow-y: auto; padding: 28px 32px; }

.bh-metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; margin-bottom: 18px; }
.bh-dash-2c { display: grid; grid-template-columns: 1fr 296px; gap: 16px; margin-bottom: 16px; }
.bh-prov-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }

.bh-mob-nav {
    display: none; position: fixed; bottom: 0; left: 0; right: 0;
    height: 62px; background: var(--bh-card); border-top: 1px solid var(--bh-border-2);
    z-index: 50; align-items: center; justify-content: space-around; padding: 0 4px;
}
.bh-mob-nav-item {
    display: flex; flex-direction: column; align-items: center; gap: 3px;
    padding: 8px 10px; cursor: pointer;
    color: var(--bh-text-5); font-size: 9.5px; font-weight: 500;
    flex: 1; text-decoration: none;
    border: none; background: none; font-family: inherit;
}
.bh-mob-nav-item.active { color: var(--bh-primary); }

.bh-bill-avatar {
    display: flex; align-items: center; justify-content: center;
    border-radius: 10px; flex-shrink: 0; font-weight: 700;
    width: 38px; height: 38px; font-size: 13px;
}

.bh-tbl { width: 100%; border-collapse: collapse; }
.bh-tbl th {
    padding: 9px 14px; text-align: left;
    font-size: 11px; font-weight: 700; color: var(--bh-text-5);
    letter-spacing: .07em; text-transform: uppercase;
    border-bottom: 1px solid var(--bh-border);
}
.bh-tbl td {
    padding: 11px 14px; font-size: 13.5px; color: var(--bh-text-2);
    border-bottom: 1px solid rgba(255,255,255,0.04);
    vertical-align: middle;
}
.bh-tbl tbody tr { transition: background .12s; }
.bh-tbl tbody tr:hover { background: rgba(255,255,255,0.025); }

.bh-upload-zone {
    border: 1.5px dashed rgba(92,107,255,0.35);
    border-radius: 16px;
    padding: 56px 40px;
    text-align: center;
    cursor: pointer;
    transition: all .2s;
    background: rgba(92,107,255,0.025);
}
.bh-upload-zone:hover { border-color: var(--bh-primary); background: rgba(92,107,255,0.07); }
.bh-upload-zone.dragging { border-color: var(--bh-primary); background: rgba(92,107,255,0.12); }

@media (max-width: 1200px) {
    .bh-dash-2c { grid-template-columns: 1fr; }
    .bh-metric-grid { grid-template-columns: repeat(2, 1fr); }
    .bh-prov-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .bh-sidebar { display: none !important; }
    .bh-mob-nav { display: flex; }
    .bh-page { padding: 18px 16px 90px; }
    .bh-metric-grid { grid-template-columns: repeat(2, 1fr); gap: 11px; }
    .bh-prov-grid { grid-template-columns: 1fr; }
    .bh-topbar { padding: 0 16px; }
    .bh-topbar-search { min-width: 0; flex: 1; margin-right: 12px; }
}

/* Blazor error UI */
h1:focus { outline: none; }
.valid.modified:not([type=checkbox]) { outline: 1px solid #26b050; }
.invalid { outline: 1px solid #e50000; }
.validation-message { color: var(--bh-danger); font-size: 12px; margin-top: 4px; }

.blazor-error-boundary {
    background: #b32121; padding: 1rem; color: white; border-radius: 8px;
}
.blazor-error-boundary::after { content: "An error has occurred."; }

#blazor-error-ui {
    background: #FBB040; color: #13141C;
    bottom: 0; box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.2);
    display: none; left: 0; padding: 0.6rem 1.25rem 0.7rem 1.25rem; position: fixed; width: 100%; z-index: 1000;
}
#blazor-error-ui .dismiss { cursor: pointer; position: absolute; right: 0.75rem; top: 0.5rem; }