:root {
    --bg: #f0f4f8;
    --card: #ffffff;
    --text: #0f172a;
    --muted: #64748b;
    --primary: #1d4ed8;
    --primary-hover: #1e40af;
    --primary-soft: #dbeafe;
    --border: #e2e8f0;
    --success: #059669;
    --danger: #dc2626;
    --warning: #b45309;
    --sidebar: #0f172a;
    --sidebar-text: #cbd5e1;
    --radius: 12px;
    --shadow: 0 1px 2px rgba(15, 23, 42, 0.05), 0 4px 12px rgba(15, 23, 42, 0.04);
    --tap: 44px;
    --font: "Segoe UI", "Heebo", Tahoma, Arial, sans-serif;
}

* { box-sizing: border-box; }

html {
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

a {
    color: var(--primary);
}

.app {
    display: grid;
    grid-template-columns: 250px 1fr;
    min-height: 100vh;
    min-height: 100dvh;
}

.mobile-topbar {
    display: none;
    position: sticky;
    top: 0;
    z-index: 40;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    background: var(--sidebar);
    color: #fff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.mobile-topbar-brand {
    font-weight: 700;
    font-size: 0.95rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
}

.nav-toggle {
    appearance: none;
    border: 0;
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    width: var(--tap);
    height: var(--tap);
    border-radius: 10px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
    padding: 0;
}

.nav-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
}

.nav-backdrop {
    display: none;
}

.sidebar {
    background: var(--sidebar);
    color: #fff;
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    position: sticky;
    top: 0;
    height: 100vh;
    height: 100dvh;
    overflow-y: auto;
}

.brand {
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.35;
    padding: 4px 8px;
}

.sidebar nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.sidebar a {
    color: var(--sidebar-text);
    text-decoration: none;
    padding: 11px 12px;
    border-radius: 10px;
    min-height: var(--tap);
    display: flex;
    align-items: center;
    transition: background 0.15s ease, color 0.15s ease;
}

.sidebar a:hover,
.sidebar a.active {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.sidebar a.active {
    background: rgba(37, 99, 235, 0.35);
}

.sidebar-footer {
    margin-top: auto;
    padding-top: 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-user {
    font-size: 0.85rem;
    color: #94a3b8;
    margin-bottom: 8px;
    padding: 0 8px;
}

.content {
    padding: 24px;
    min-width: 0;
}

.page-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.page-header h1 {
    margin: 0;
    font-size: clamp(1.35rem, 2.5vw, 1.75rem);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.tenant-banner {
    background: #eff6ff;
    border: 1px solid #93c5fd;
    padding: 10px 14px;
    border-radius: 10px;
    margin-bottom: 16px;
    font-size: 0.9rem;
}

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

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 14px;
}

.stat {
    background: linear-gradient(180deg, #fff 0%, var(--bg) 100%);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
}

.stat-label {
    color: var(--muted);
    font-size: 0.88rem;
    margin-bottom: 8px;
}

.stat-value {
    font-size: clamp(1.25rem, 3vw, 1.6rem);
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

.toolbar {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: flex-end;
    margin-bottom: 16px;
}

.toolbar > label,
.toolbar label {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 0.9rem;
    color: var(--muted);
    min-width: min(100%, 160px);
    flex: 1 1 160px;
}

.toolbar label > input,
.toolbar label > select,
.toolbar label > textarea {
    width: 100%;
}

input, select, textarea {
    padding: 11px 12px;
    border: 1px solid var(--border);
    border-radius: 10px;
    font: inherit;
    background: #fff;
    color: var(--text);
    min-height: var(--tap);
    width: 100%;
    max-width: 100%;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

textarea {
    min-height: 88px;
    resize: vertical;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: #93c5fd;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.table-wrap {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: #fff;
}

.table-wrap table {
    margin: 0;
    border: 0;
}

.table-wrap th:first-child,
.table-wrap td:first-child {
    padding-inline-start: 14px;
}

.table-wrap th:last-child,
.table-wrap td:last-child {
    padding-inline-end: 14px;
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 520px;
}

.card > table,
.receipt-preview table,
.receipt-payments-table,
.payments-table {
    min-width: 0;
}

th, td {
    padding: 12px 10px;
    border-bottom: 1px solid var(--border);
    text-align: right;
    vertical-align: middle;
}

th {
    background: #f8fafc;
    font-size: 0.85rem;
    color: var(--muted);
    font-weight: 600;
    white-space: nowrap;
}

tr:last-child td {
    border-bottom: 0;
}

tr:hover td {
    background: #f8fafc;
}

/* Buttons */
button,
.btn,
a.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: var(--tap);
    padding: 10px 18px;
    border-radius: 10px;
    border: 1px solid transparent;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s ease, filter 0.15s ease, border-color 0.15s ease;
}

button[type="submit"],
.btn-primary,
.btn-add-payment {
    background: var(--primary);
    color: #fff;
}

button[type="submit"]:hover,
.btn-primary:hover,
.btn-add-payment:hover {
    background: var(--primary-hover);
}

.btn-secondary {
    background: #fff;
    color: var(--text);
    border-color: var(--border);
}

.btn-secondary:hover {
    background: var(--bg);
}

.btn-danger {
    background: var(--danger);
    color: #fff;
}

a.link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

a.link:hover {
    text-decoration: underline;
}

.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 0.8rem;
    background: var(--primary-soft);
    color: var(--primary);
    font-weight: 600;
}

.badge.customer { background: #dcfce7; color: var(--success); }
.badge.supplier { background: #fee2e2; color: var(--danger); }

.amount { white-space: nowrap; font-variant-numeric: tabular-nums; }
.amount.positive { color: var(--danger); }
.amount.negative { color: var(--success); }

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

.meta-list {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 8px 16px;
}

.meta-list dt { color: var(--muted); }
.meta-list dd { margin: 0; }

.actions-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    margin-top: 16px;
}

.contact-picker-wrap {
    min-width: min(100%, 360px);
    flex: 1 1 320px;
}

.contact-picker-label-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 6px;
}

.contact-picker-label {
    display: block;
    margin: 0;
    font-size: 0.95rem;
}

.contact-picker-add-btn {
    border: 1px solid #0f766e;
    background: #fff;
    color: #0f766e;
    border-radius: 8px;
    padding: 4px 10px;
    min-height: 32px;
    font: inherit;
    font-size: 0.82rem;
    font-weight: 700;
    cursor: pointer;
}

.contact-picker-add-btn:hover {
    background: #f0fdfa;
}

.contact-picker-create {
    position: fixed;
    inset: 0;
    z-index: 1200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    box-sizing: border-box;
}

.contact-picker-create[hidden] {
    display: none !important;
}

.contact-picker-create-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.45);
}

.contact-picker-create-dialog {
    position: relative;
    z-index: 1;
    width: min(560px, 100%);
    max-height: calc(100vh - 32px);
    overflow: auto;
    padding: 16px;
    border: 1px solid #99f6e4;
    border-radius: 12px;
    background: #fff;
    box-shadow: 0 18px 48px rgba(15, 23, 42, 0.22);
    box-sizing: border-box;
}

.contact-picker-create-title {
    margin: 0 0 12px;
    font-size: 1.05rem;
    font-weight: 700;
    color: #0f766e;
}

.contact-picker-create-grid {
    display: grid;
    grid-template-columns: 110px 1fr 1fr 1fr;
    gap: 8px;
}

.contact-picker-create-grid label {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 0.8rem;
    color: var(--muted);
}

.contact-picker-create-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin-top: 12px;
}

.contact-create-save {
    background: #0f766e;
    border-color: #0f766e;
    min-height: 36px;
    padding: 6px 12px;
    font-size: 0.88rem;
}

body.contact-create-open {
    overflow: hidden;
}

.contact-create-error {
    color: #b91c1c;
    font-size: 0.82rem;
}

.contact-picker-wrap.is-compact .contact-picker-card {
    padding: 8px 10px;
}

.contact-picker-wrap.is-compact .contact-picker-meta {
    display: none;
}

.contact-picker-wrap.is-compact .contact-picker-card-head {
    margin-bottom: 0;
}

.contact-picker-wrap.is-compact .contact-picker-view {
    display: none;
}

@media (max-width: 720px) {
    .contact-picker-create-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.contact-picker {
    position: relative;
}

.contact-picker-search {
    width: 100%;
}

.contact-picker-clear {
    position: absolute;
    left: 8px;
    top: 50%;
    transform: translateY(-50%);
    border: 0;
    background: var(--bg);
    color: var(--primary);
    cursor: pointer;
    padding: 4px 10px;
    border-radius: 6px;
    font: inherit;
    font-size: 0.85rem;
    min-height: 32px;
}

.contact-picker-results {
    position: absolute;
    z-index: 30;
    top: calc(100% + 4px);
    right: 0;
    left: 0;
    max-height: 280px;
    overflow: auto;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

.contact-picker-option {
    display: block;
    width: 100%;
    border: 0;
    background: transparent;
    text-align: right;
    padding: 12px 14px;
    cursor: pointer;
    font: inherit;
    border-bottom: 1px solid var(--border);
    min-height: var(--tap);
}

.contact-picker-option:last-child {
    border-bottom: 0;
}

.contact-picker-option:hover,
.contact-picker-option.active {
    background: var(--primary-soft);
}

.contact-picker-option-name {
    display: block;
    font-weight: 600;
}

.contact-picker-option-meta {
    display: block;
    color: var(--muted);
    font-size: 0.85rem;
    margin-top: 4px;
}

.contact-picker-empty {
    padding: 14px;
    color: var(--muted);
    font-size: 0.9rem;
}

.contact-picker-details {
    margin-top: 10px;
}

.contact-picker-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 14px;
}

.contact-picker-card-head {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 8px;
}

.contact-picker-meta {
    display: grid;
    grid-template-columns: 90px 1fr;
    gap: 6px 12px;
    margin: 0 0 8px;
}

.contact-picker-meta dt {
    color: var(--muted);
    margin: 0;
}

.contact-picker-meta dd {
    margin: 0;
}

.contact-picker-view {
    font-size: 0.85rem;
}

.create-with-preview {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, 420px);
    gap: 20px;
    align-items: start;
}

.create-preview-sticky {
    position: sticky;
    top: 16px;
}

.create-preview-card h2 {
    margin: 0 0 12px;
    font-size: 1.05rem;
}

.receipt-preview {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 20px;
    font-size: 0.82rem;
    line-height: 1.45;
    box-shadow: inset 0 0 0 1px rgba(0,0,0,0.02);
}

.receipt-preview .preview-header {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    border-bottom: 2px solid #111;
    padding-bottom: 10px;
    margin-bottom: 12px;
}

.receipt-preview .preview-header h3 {
    margin: 0 0 4px;
    font-size: 1rem;
}

.receipt-preview .preview-header h4 {
    margin: 0 0 8px;
    font-size: 0.95rem;
}

.receipt-preview .preview-party {
    background: #f8fafc;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 10px 12px;
    margin-bottom: 12px;
}

.receipt-preview .preview-party h5 {
    margin: 0 0 6px;
    color: #555;
    font-size: 0.78rem;
    font-weight: 600;
}

.receipt-preview .preview-amount {
    text-align: center;
    border: 2px dashed #bbb;
    border-radius: 8px;
    padding: 14px;
    margin: 12px 0;
}

.receipt-preview .preview-amount strong {
    display: block;
    font-size: 1.35rem;
    margin-top: 4px;
}

.receipt-preview table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 12px;
    min-width: 0;
}

.receipt-preview th,
.receipt-preview td {
    border: 1px solid #ddd;
    padding: 6px 8px;
    text-align: right;
    vertical-align: top;
}

.receipt-preview th {
    background: #f3f4f6;
    font-size: 0.75rem;
}

.receipt-preview .preview-totals {
    width: 100%;
    max-width: 220px;
    margin-right: auto;
}

.receipt-preview .preview-totals div {
    display: flex;
    justify-content: space-between;
    padding: 4px 0;
    border-bottom: 1px solid #eee;
}

.receipt-preview .preview-totals .grand {
    font-weight: 700;
    border-top: 2px solid #111;
    border-bottom: 0;
    margin-top: 6px;
    padding-top: 8px;
}

.receipt-preview .preview-note {
    color: #666;
    font-size: 0.78rem;
    margin-top: 8px;
}

.receipt-preview .preview-empty {
    color: var(--muted);
    font-style: italic;
}

.payment-details td {
    background: #fafafa;
    padding-top: 0;
}

.payment-details-inner {
    display: none;
    flex-wrap: wrap;
    gap: 10px;
    padding: 10px 0 4px;
}

.payment-details-inner.active {
    display: flex;
}

.payment-details-inner label {
    font-size: 0.85rem;
}

.payment-details-inner input {
    display: block;
    margin-top: 4px;
    min-width: 120px;
}

.payments-table .remove-line {
    border: 0;
    background: transparent;
    color: var(--danger);
    cursor: pointer;
    font-size: 1.1rem;
    line-height: 1;
    padding: 4px 8px;
    min-height: var(--tap);
}

.receipt-create-page .receipt-section {
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.receipt-create-page .receipt-section:last-of-type {
    border-bottom: 0;
}

.receipt-create-page h2 {
    margin: 0 0 14px;
    font-size: 1.05rem;
}

.receipt-payments-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 0;
}

.receipt-payments-table th,
.receipt-payments-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    text-align: right;
    vertical-align: top;
}

.receipt-payments-table th {
    background: var(--bg);
    font-size: 0.9rem;
}

.receipt-payments-table .payment-details-cell {
    color: #444;
    font-size: 0.9rem;
    line-height: 1.5;
}

.receipt-payments-table #payments-empty td {
    text-align: center;
    padding: 20px;
}

.receipt-empty,
.receipt-hint {
    color: var(--muted);
    font-size: 0.92rem;
    margin: 0;
}

.receipt-payments-table .remove-payment {
    border: 0;
    background: transparent;
    color: var(--danger);
    cursor: pointer;
    font-size: 1.2rem;
    line-height: 1;
    padding: 2px 8px;
    min-height: var(--tap);
}

.current-payment-box {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
}

.draft-fields {
    display: none;
    margin-top: 12px;
}

.draft-fields.active {
    display: block;
}

.btn-add-payment {
    margin-top: 16px;
}

.draft-error {
    color: var(--danger);
    margin: 10px 0 0;
    font-size: 0.9rem;
}

.receipt-summary-box {
    background: #f8fafc;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px 20px;
}

.receipt-summary-lines {
    max-width: 360px;
    margin-bottom: 16px;
}

.receipt-summary-lines > div {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid #e5e7eb;
}

.receipt-summary-lines .grand {
    font-size: 1.1rem;
    border-top: 2px solid #111;
    border-bottom: 0;
    margin-top: 6px;
    padding-top: 12px;
}

#save-receipt-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.link-btn {
    background: none;
    border: 0;
    color: var(--primary);
    cursor: pointer;
    font: inherit;
    padding: 0;
    text-decoration: underline;
    min-height: auto;
}

.link-btn.danger {
    color: var(--danger);
}

/* Login */
.login-page {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px 16px;
    background:
        radial-gradient(1200px 500px at 10% -10%, #dbeafe 0%, transparent 55%),
        radial-gradient(900px 400px at 100% 0%, #e0e7ff 0%, transparent 50%),
        var(--bg);
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 28px 24px;
    box-shadow: var(--shadow);
}

.login-card h1 {
    margin: 0 0 8px;
    font-size: 1.5rem;
}

.login-card .login-sub {
    color: var(--muted);
    margin: 0 0 20px;
    font-size: 0.95rem;
}

.login-card label {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 14px;
    font-size: 0.92rem;
    color: var(--muted);
}

.login-card .login-error {
    color: var(--danger);
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: 10px;
    padding: 10px 12px;
    margin-bottom: 14px;
}

.login-card .login-hint {
    color: var(--muted);
    font-size: 0.85rem;
    margin-top: 14px;
}

@media (max-width: 1100px) {
    .create-with-preview {
        grid-template-columns: 1fr;
    }

    .create-preview-sticky {
        position: static;
    }
}

@media (max-width: 900px) {
    .app {
        grid-template-columns: 1fr;
    }

    .mobile-topbar {
        display: flex;
    }

    .nav-backdrop {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(15, 23, 42, 0.45);
        z-index: 45;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.2s ease;
    }

    body.nav-open .nav-backdrop {
        opacity: 1;
        pointer-events: auto;
    }

    .sidebar {
        position: fixed;
        top: 0;
        bottom: 0;
        right: 0;
        width: min(300px, 86vw);
        z-index: 50;
        transform: translateX(105%);
        transition: transform 0.22s ease;
        box-shadow: -8px 0 30px rgba(0, 0, 0, 0.25);
        height: 100dvh;
    }

    body.nav-open .sidebar {
        transform: translateX(0);
    }

    .content {
        padding: 16px;
    }

    .page-header {
        margin-bottom: 14px;
    }

    .card {
        padding: 16px;
        border-radius: 12px;
    }

    .grid-2 {
        grid-template-columns: 1fr;
    }

    .meta-list {
        grid-template-columns: 1fr;
        gap: 2px 0;
    }

    .meta-list dt {
        margin-top: 8px;
    }

    .toolbar {
        gap: 10px;
    }

    .toolbar > label,
    .toolbar label {
        min-width: 100%;
        flex: 1 1 100%;
    }

    .toolbar > button,
    .toolbar > .btn,
    .actions-row > button,
    .actions-row > .btn,
    .actions-row > a.btn {
        width: 100%;
    }

    .contact-picker-wrap {
        min-width: 100%;
        flex: 1 1 100%;
    }

    .stats {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 10px;
    }

    .stat {
        padding: 12px;
    }

    .stat-value {
        font-size: 1.25rem;
    }
}

@media (max-width: 480px) {
    .stats {
        grid-template-columns: 1fr;
    }

    .content {
        padding: 12px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .sidebar,
    .nav-backdrop,
    button,
    .btn {
        transition: none;
    }
}