/* --- Global Styles & Variables --- */
:root {
    --primary-color: #2563eb;
    --primary-color-light: #dbeafe;
    --secondary-color: #f1f5f9;
    --text-color: #334155;
    --text-color-light: #64748b;
    --border-color: #e2e8f0;
    --white: #ffffff;
    --danger-color: #dc2626;
    --warning-color: #f97316;
    --success-color: #16a34a;
    --font-family: 'Inter', sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--secondary-color);
    color: var(--text-color);
    line-height: 1.6;
}

/* --- App Layout --- */
.app-container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background-color: var(--white);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
}

.main-content {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

/* --- Sidebar --- */
.sidebar-header {
    margin-bottom: 2.5rem;
}

.sidebar-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
}

.sidebar-header p {
    font-size: 0.875rem;
    color: var(--text-color-light);
}

.sidebar-nav {
    list-style: none;
}

.sidebar-nav li a {
    display: block;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    margin-bottom: 0.5rem;
    transition: background-color 0.2s, color 0.2s;
}

.sidebar-nav li a:hover {
    background-color: var(--secondary-color);
}

.sidebar-nav li.active a {
    background-color: var(--primary-color);
    color: var(--white);
}

/* --- Page Header --- */
.page-header {
    margin-bottom: 2rem;
}

.page-header h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.page-header p {
    color: var(--text-color-light);
}

/* --- Summary Tiles --- */
.summary-tiles {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.tile {
    background-color: var(--white);
    padding: 1.5rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
}

.tile h3 {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-color-light);
    margin-bottom: 0.5rem;
}

.tile .tile-value {
    font-size: 2.25rem;
    font-weight: 700;
}

/* --- Page Actions --- */
.page-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.page-actions h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

#add-property-btn {
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
}

#add-property-btn:hover {
    background-color: #1d4ed8;
}

/* --- Property List --- */
#property-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1.5rem;
}

.property-card {
    background-color: var(--white);
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.card-header {
    padding: 1.5rem;
}

.card-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.card-header p {
    color: var(--text-color-light);
}

.card-body {
    padding: 0 1.5rem 1.5rem;
}

.rent-details, .tenant-info, .lease-period {
    margin-bottom: 1rem;
}

.rent-details {
    display: flex;
    gap: 1rem;
}

.rent-details > div {
    flex: 1;
    background-color: var(--secondary-color);
    padding: 1rem;
    border-radius: 0.5rem;
}

.rent-details span {
    font-size: 0.875rem;
    color: var(--text-color-light);
    display: block;
    margin-bottom: 0.25rem;
}

.rent-details strong {
    font-size: 1.25rem;
    font-weight: 600;
}

.tenant-info h4, .lease-period h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.card-footer {
    padding: 1rem 1.5rem;
    background-color: var(--secondary-color);
    display: flex;
    gap: 1rem;
}

.card-footer button {
    background-color: var(--primary-color-light);
    color: var(--primary-color);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-weight: 500;
    cursor: pointer;
}

.status-bar {
    padding: 0.75rem 1.5rem;
    text-align: center;
    font-weight: 600;
    color: var(--white);
}

.status-bar.critical { background-color: var(--danger-color); }
.status-bar.warning { background-color: var(--warning-color); }
.status-bar.normal { background-color: var(--success-color); }

/* --- Form Layout --- */
.form-layout {
    max-width: 800px;
    margin: 0 auto;
}

.form-section {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.form-section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group input[type="date"],
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 1rem;
}

.form-group input[readonly] {
    background-color: var(--secondary-color);
}

.checkbox-group {
    display: flex;
    align-items: center;
}

.checkbox-group input {
    margin-right: 0.5rem;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

.form-actions button {
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid var(--border-color);
}

.form-actions button[type="submit"] {
    background-color: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

.form-actions #cancel-btn {
    background-color: var(--white);
    color: var(--text-color);
}

/* --- Table Styles --- */
.table-container {
    background-color: var(--white);
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
    overflow: hidden;
}

table {
    width: 100%;
    border-collapse: collapse;
}

table th, table td {
    padding: 1rem 1.5rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

table th {
    background-color: var(--secondary-color);
    font-weight: 600;
}

table tbody tr:last-child td {
    border-bottom: none;
}

table tbody tr:hover {
    background-color: var(--secondary-color);
}

.status {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: capitalize;
}

.status-pending { background-color: #fef9c3; color: #a16207; }
.status-sent { background-color: var(--primary-color-light); color: var(--primary-color); }
.status-paid { background-color: #dcfce7; color: #166534; }