/* ==========================================
   REAL ESTATE WEBSITE - CORE STYLES
   ========================================== */

:root {
    --primary-color: #2563EB;
    --secondary-color: #1E40AF;
    --success-color: #10B981;
    --danger-color: #EF4444;
    --warning-color: #F59E0B;
    --info-color: #3B82F6;
    --dark-color: #1F2937;
    --light-color: #F3F4F6;
    --border-color: #E5E7EB;
    --text-color: #111827;
    --text-light: #6B7280;
    --shadow: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.15);
}

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

html, body {
    height: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #FFFFFF;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--secondary-color);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 1rem;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.container-fluid {
    width: 100%;
    padding-left: 1rem;
    padding-right: 1rem;
}

/* Grid */
.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Flexbox */
.flex {
    display: flex;
    gap: 1rem;
}

.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.flex-center {
    display: flex;
    justify-content: center;
    align-items: center;
}

.flex-column {
    flex-direction: column;
}

/* Forms */
form {
    margin-bottom: 1.5rem;
}

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

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-color);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
input[type="time"],
input[type="datetime-local"],
input[type="tel"],
input[type="url"],
input[type="search"],
input[type="color"],
select,
textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

textarea {
    resize: vertical;
    min-height: 120px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    border: none;
    border-radius: 0.375rem;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--secondary-color);
    box-shadow: var(--shadow);
}

.btn-secondary {
    background-color: var(--light-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

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

.btn-success {
    background-color: var(--success-color);
    color: white;
}

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

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-block {
    width: 100%;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Cards */
.card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--light-color);
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
    background-color: var(--light-color);
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1.5rem;
}

th {
    background-color: var(--light-color);
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid var(--border-color);
}

td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

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

/* Alerts */
.alert {
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
    border-radius: 0.375rem;
    border-left: 4px solid;
}

.alert-success {
    background-color: #D1F2E8;
    color: #065F46;
    border-color: var(--success-color);
}

.alert-danger {
    background-color: #FEE2E2;
    color: #991B1B;
    border-color: var(--danger-color);
}

.alert-warning {
    background-color: #FEF3C7;
    color: #92400E;
    border-color: var(--warning-color);
}

.alert-info {
    background-color: #DBEAFE;
    color: #1E3A8A;
    border-color: var(--info-color);
}

.alert-close {
    float: right;
    cursor: pointer;
    font-weight: bold;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: 9999px;
}

.badge-success {
    background-color: #D1F2E8;
    color: #065F46;
}

.badge-danger {
    background-color: #FEE2E2;
    color: #991B1B;
}

.badge-warning {
    background-color: #FEF3C7;
    color: #92400E;
}

.badge-info {
    background-color: #DBEAFE;
    color: #1E3A8A;
}

/* Header */
.header {
    background-color: white;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav a {
    font-weight: 500;
    transition: color 0.3s ease;
}

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

/* Footer */
.footer {
    background-color: var(--dark-color);
    color: white;
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    color: white;
    margin-bottom: 1rem;
}

.footer-section a {
    color: #D1D5DB;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    padding-top: 1rem;
    border-top: 1px solid #374151;
    text-align: center;
    color: #D1D5DB;
}

/* Pagination */
.pagination {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    margin: 2rem 0;
}

.pagination a,
.pagination span {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    color: var(--primary-color);
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.pagination a:hover {
    background-color: var(--primary-color);
    color: white;
}

.pagination .active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.pagination .disabled {
    color: var(--text-light);
    cursor: not-allowed;
    opacity: 0.5;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: white;
    padding: 2rem;
    border-radius: 0.5rem;
    max-width: 600px;
    width: 90%;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-light);
}

/* Loading spinner */
.spinner {
    border: 4px solid var(--light-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Progress bar */
.progress {
    width: 100%;
    height: 6px;
    background-color: var(--light-color);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.progress-bar {
    height: 100%;
    background-color: var(--primary-color);
    width: 0%;
    transition: width 0.3s ease;
}

/* Utility classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.text-muted { color: var(--text-light); }
.text-danger { color: var(--danger-color); }
.text-success { color: var(--success-color); }
.text-warning { color: var(--warning-color); }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

.hidden { display: none !important; }
.invisible { visibility: hidden; }

.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }

/* Responsive */
@media (max-width: 1024px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
    
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.25rem; }
    h3 { font-size: 1.1rem; }
    
    .nav {
        gap: 1rem;
    }
    
    .grid, .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .header-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    table {
        font-size: 0.875rem;
    }
    
    th, td {
        padding: 0.5rem;
    }
}

@media (max-width: 480px) {
    h1 { font-size: 1.25rem; }
    
    .container {
        padding: 0 0.5rem;
    }
    
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
    
    .modal-content {
        padding: 1rem;
    }
}

/* Print styles */
@media print {
    .btn, .nav, .header, .footer {
        display: none;
    }
    
    body {
        background-color: white;
    }
}