:root {
    --bg: #f7f7fb;
    --card: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --border: #e5e7eb;
    --primary: #1d4ed8;
    --primary-dark: #1e40af;
    --success: #166534;
    --warning: #92400e;
    --danger: #991b1b;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: #111827;
    color: white;
    flex-wrap: wrap;
}
.topbar a { color: white; }
.brand a {
    font-weight: 800;
    font-size: 1.1rem;
}
.navlinks {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}
.nav-user {
    display: flex;
    align-items: center;
    gap: 1rem;
}
.container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 1.5rem;
}
.narrow {
    max-width: 780px;
}
.hero {
    margin-bottom: 1rem;
}
.page-header {
    margin-bottom: 1rem;
}
.cards, .grid-2, .grid-3 {
    display: grid;
    gap: 1rem;
}
.cards {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    margin-bottom: 1rem;
}
.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    margin-bottom: 1rem;
}
.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.card, .login-card, .receipt, .card-light {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1rem 1.2rem;
    box-shadow: 0 10px 30px rgba(17, 24, 39, 0.04);
}
.card { margin-bottom: 1rem; }
.card-light {
    background: #f9fafb;
    margin-top: 0.75rem;
}
.list-item {
    border-top: 1px solid var(--border);
    padding-top: 1rem;
    margin-top: 1rem;
}
.list-item:first-of-type {
    border-top: none;
    margin-top: 0;
    padding-top: 0;
}
.list-item.compact {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: flex-start;
}
.stat-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
}
.title-line {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}
.meta {
    font-size: 0.92rem;
    color: var(--muted);
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
}
.muted {
    color: var(--muted);
}
.badge {
    display: inline-flex;
    padding: 0.3rem 0.7rem;
    border-radius: 999px;
    background: #e0e7ff;
    color: #312e81;
    font-size: 0.85rem;
    font-weight: 700;
}
.badge.highlight {
    background: #dbeafe;
    color: #1e3a8a;
}
.form-stack {
    display: grid;
    gap: 0.85rem;
}
.inline-form {
    display: flex;
    gap: 0.75rem;
    align-items: end;
    flex-wrap: wrap;
}
label {
    display: grid;
    gap: 0.35rem;
    font-weight: 600;
}
.checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
input, textarea, select {
    width: 100%;
    padding: 0.75rem 0.85rem;
    border: 1px solid #cbd5e1;
    border-radius: 10px;
    font: inherit;
    background: white;
}
textarea {
    resize: vertical;
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    border: none;
    border-radius: 10px;
    padding: 0.8rem 1rem;
    font: inherit;
    cursor: pointer;
    text-decoration: none;
}
.btn-primary {
    background: var(--primary);
    color: white;
}
.btn-primary:hover {
    background: var(--primary-dark);
    text-decoration: none;
}
.btn-light, .btn-link {
    background: #eef2ff;
    color: #312e81;
}
.btn-link {
    padding: 0.5rem 0.75rem;
}
.flash {
    border-radius: 12px;
    padding: 0.9rem 1rem;
    margin-bottom: 1rem;
    font-weight: 600;
}
.flash.ok {
    background: #dcfce7;
    color: var(--success);
}
.flash.warn {
    background: #fef3c7;
    color: var(--warning);
}
.flash.err {
    background: #fee2e2;
    color: var(--danger);
}
.login-body {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 1rem;
}
.login-card {
    width: 100%;
    max-width: 520px;
}
.info-box {
    margin-top: 1rem;
    padding: 0.9rem 1rem;
    background: #eff6ff;
    border-radius: 12px;
    color: #1e3a8a;
}
.receipt-body {
    background: #ffffff;
}
.receipt {
    max-width: 940px;
    margin: 2rem auto;
}
.receipt-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}
.receipt-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}
.receipt-grid > div {
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 0.8rem;
}
@media (max-width: 900px) {
    .nav-user, .navlinks, .topbar {
        width: 100%;
    }
}
@media print {
    .receipt-actions, .topbar {
        display: none !important;
    }
    body {
        background: #fff;
    }
    .receipt {
        box-shadow: none;
        border: none;
        margin: 0;
        padding: 0;
    }
}
.table-scroll {
    width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    margin-top: 0.75rem;
    border-radius: 16px;
}

.payments-table {
    width: max-content;
    min-width: 1350px;
    border-collapse: separate;
    border-spacing: 0;
}

.payments-table th,
.payments-table td {
    padding: 10px 12px;
    vertical-align: top;
    line-height: 1.35;
    font-size: 0.95rem;
}

.payments-table thead th {
    position: sticky;
    top: 0;
    z-index: 1;
    background: #f8fafc;
    white-space: nowrap;
}

/* Columnas cortas: que no se rompan */
.payments-table th:nth-child(1),
.payments-table td:nth-child(1),
.payments-table th:nth-child(2),
.payments-table td:nth-child(2),
.payments-table th:nth-child(3),
.payments-table td:nth-child(3),
.payments-table th:nth-child(6),
.payments-table td:nth-child(6),
.payments-table th:nth-child(8),
.payments-table td:nth-child(8),
.payments-table th:nth-child(9),
.payments-table td:nth-child(9),
.payments-table th:nth-child(10),
.payments-table td:nth-child(10),
.payments-table th:nth-child(11),
.payments-table td:nth-child(11),
.payments-table th:nth-child(12),
.payments-table td:nth-child(12) {
    white-space: nowrap;
}

/* Vecino */
.payments-table th:nth-child(5),
.payments-table td:nth-child(5) {
    min-width: 240px;
}

/* Concepto */
.payments-table th:nth-child(7),
.payments-table td:nth-child(7) {
    min-width: 220px;
}

/* Detalle */
.payments-table th:nth-child(1),
.payments-table td:nth-child(1) {
    min-width: 90px;
}

/* Estado */
.payments-table th:nth-child(2),
.payments-table td:nth-child(2) {
    min-width: 95px;
}

/* Unidad */
.payments-table th:nth-child(3),
.payments-table td:nth-child(3) {
    min-width: 85px;
}

/* Teléfono */
.payments-table th:nth-child(6),
.payments-table td:nth-child(6) {
    min-width: 110px;
}

/* Pago */
.payments-table th:nth-child(11),
.payments-table td:nth-child(11) {
    min-width: 130px;
}

/* Referencia / recibo */
.payments-table th:nth-child(12),
.payments-table td:nth-child(12) {
    min-width: 180px;
}

.payments-table td small,
.payments-table td .muted,
.payments-table td .subtext {
    display: block;
    margin-top: 0.2rem;
    line-height: 1.3;
}

@media (max-width: 1400px) {
    .payments-table th,
    .payments-table td {
        padding: 8px 10px;
        font-size: 0.9rem;
    }
}


.grid-4 {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    margin-bottom: 1rem;
}

.grid-span-2 {
    grid-column: span 2;
}

.button-row {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    align-items: center;
}

.button-row.compact {
    gap: 0.5rem;
}

.inline-form {
    display: inline;
    margin: 0;
}

.btn-small {
    padding: 0.45rem 0.7rem;
    font-size: 0.86rem;
}

.btn-danger {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.btn-danger:hover {
    background: #fecaca;
    text-decoration: none;
}

.badge.info {
    background: #dbeafe;
    color: #1e3a8a;
}

.admin-tabs {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.tab-link {
    display: inline-flex;
    align-items: center;
    padding: 0.7rem 1rem;
    border-radius: 999px;
    background: #eef2ff;
    color: #1e3a8a;
    font-weight: 600;
    text-decoration: none;
}

.tab-link:hover {
    background: #dbeafe;
    text-decoration: none;
}

.tab-link.active {
    background: #1d4ed8;
    color: white;
}

.water-entry-grid {
    align-items: end;
}

.water-table,
.water-admin-table {
    width: 100%;
    min-width: 980px;
    border-collapse: collapse;
}

.water-table th,
.water-table td,
.water-admin-table th,
.water-admin-table td {
    padding: 0.85rem 0.75rem;
    border-top: 1px solid var(--border);
    vertical-align: top;
    font-size: 0.93rem;
}

.water-table thead th,
.water-admin-table thead th {
    border-top: none;
    color: var(--muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    white-space: nowrap;
}

.water-table tbody tr:first-child td,
.water-admin-table tbody tr:first-child td {
    border-top: 1px solid var(--border);
}

.water-table td:nth-child(5),
.water-admin-table td:nth-child(8) {
    min-width: 160px;
}

.water-admin-table td:nth-child(2) {
    min-width: 210px;
}

@media (max-width: 900px) {
    .grid-span-2 {
        grid-column: auto;
    }
}


.login-card-wide {
    max-width: 760px;
}

.badge.warning {
    background: #fef3c7;
    color: #92400e;
}

.badge.success {
    background: #dcfce7;
    color: #166534;
}