:root {
    --primary-blue: #003580;
    --accent-green: #00a699;
    --secondary-blue: #0066cc;
    --light-bg: #ffffff;
    --dark-bg: #1a1a1a;
    --dark-secondary: #2d2d2d;
    --text-light: #333333;
    --text-dark: #e0e0e0;
    --border-light: #e0e0e0;
    --border-dark: #404040;
    --success: #00a699;
    --danger: #e74c3c;
    --warning: #f39c12;
}

[data-theme="dark"] {
    --primary-blue: #003580;
    --accent-green: #00c0a3;
    --secondary-blue: #0077ff;
    --light-bg: #1a1a1a;
    --dark-bg: #0d0d0d;
    --dark-secondary: #1f1f1f;
    --text-light: #e0e0e0;
    --text-dark: #e0e0e0;
    --border-light: #404040;
    --border-dark: #505050;
}

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

html, body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    font-size: 16px;
    background-color: var(--light-bg);
    color: var(--text-light);
    line-height: 1.5;
    transition: background-color 0.3s ease, color 0.3s ease;
}

[data-theme="dark"] html, [data-theme="dark"] body {
    background-color: var(--dark-bg);
    color: var(--text-dark);
}

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

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

a {
    color: var(--primary-blue);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 0.375rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
    text-decoration: none;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background-color: var(--secondary-blue);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 53, 128, 0.3);
}

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

.btn-success:hover {
    background-color: #00a699;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 198, 163, 0.3);
}

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

.btn-danger:hover {
    background-color: #c0392b;
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
}

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

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

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

[data-theme="dark"] label {
    color: var(--text-dark);
}

input, textarea, select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-light);
    border-radius: 0.375rem;
    font-family: inherit;
    font-size: 1rem;
    background-color: var(--light-bg);
    color: var(--text-light);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

[data-theme="dark"] input, [data-theme="dark"] textarea, [data-theme="dark"] select {
    background-color: var(--dark-secondary);
    color: var(--text-dark);
    border-color: var(--border-dark);
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 53, 128, 0.1);
}

/* Cards */
.card {
    background-color: var(--light-bg);
    border: 1px solid var(--border-light);
    border-radius: 0.5rem;
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

[data-theme="dark"] .card {
    background-color: var(--dark-secondary);
    border-color: var(--border-dark);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}

.card:hover {
    box-shadow: 0 4px 16px rgba(0, 53, 128, 0.15);
    transform: translateY(-4px);
}

.card-header {
    border-bottom: 2px solid var(--border-light);
    margin-bottom: 1rem;
    padding-bottom: 1rem;
}

[data-theme="dark"] .card-header {
    border-bottom-color: var(--border-dark);
}

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

.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

@media (max-width: 768px) {
    .grid-2, .grid-3 {
        grid-template-columns: 1fr;
    }
}

/* Navbar */
.navbar {
    background-color: var(--light-bg);
    border-bottom: 2px solid var(--border-light);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .navbar {
    background-color: var(--dark-secondary);
    border-bottom-color: var(--border-dark);
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

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

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

.navbar-menu a {
    color: var(--text-light);
    font-weight: 500;
}

[data-theme="dark"] .navbar-menu a {
    color: var(--text-dark);
}

.navbar-menu a:hover {
    color: var(--primary-blue);
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    padding: 0.5rem;
}

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

.alert-info {
    background-color: #e3f2fd;
    color: #01579b;
    border-left-color: #2196f3;
}

[data-theme="dark"] .alert-info {
    background-color: #0d2c54;
    color: #64b5f6;
}

.alert-success {
    background-color: #e8f5e9;
    color: #1b5e20;
    border-left-color: #4caf50;
}

[data-theme="dark"] .alert-success {
    background-color: #1b5e20;
    color: #81c784;
}

.alert-danger {
    background-color: #ffebee;
    color: #b71c1c;
    border-left-color: #f44336;
}

[data-theme="dark"] .alert-danger {
    background-color: #5d1f1a;
    color: #ef5350;
}

/* Utilities */
.text-center {
    text-align: center;
}

.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; }

.px-2 { padding-left: 1rem; padding-right: 1rem; }
.py-2 { padding-top: 1rem; padding-bottom: 1rem; }
.px-3 { padding-left: 1.5rem; padding-right: 1.5rem; }
.py-3 { padding-top: 1.5rem; padding-bottom: 1.5rem; }

.flex {
    display: flex;
}

.justify-between {
    justify-content: space-between;
}

.items-center {
    align-items: center;
}

.gap-2 {
    gap: 1rem;
}

.gap-3 {
    gap: 1.5rem;
}

/* Loading */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--border-light);
    border-radius: 50%;
    border-top-color: var(--primary-blue);
    animation: spin 0.6s linear infinite;
}

[data-theme="dark"] .spinner {
    border-color: var(--border-dark);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Accommodation Card */
.accommodation-card {
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.accommodation-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.accommodation-info {
    flex-grow: 1;
    padding: 1rem;
}

.accommodation-type {
    display: inline-block;
    background-color: var(--accent-green);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 0.25rem;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.accommodation-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin: 0.5rem 0;
}

.accommodation-details {
    display: flex;
    gap: 1rem;
    font-size: 0.875rem;
    color: #666;
    margin: 1rem 0;
}

[data-theme="dark"] .accommodation-details {
    color: #999;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background-color: var(--light-bg);
    border-radius: 0.5rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

[data-theme="dark"] .modal-content {
    background-color: var(--dark-secondary);
}

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

[data-theme="dark"] .modal-header {
    border-bottom-color: var(--border-dark);
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-light);
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

[data-theme="dark"] .modal-footer {
    border-top-color: var(--border-dark);
}

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

[data-theme="dark"] .close-btn {
    color: var(--text-dark);
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 1.8rem;
    }

    h2 {
        font-size: 1.4rem;
    }

    .navbar-menu {
        gap: 1rem;
    }

    .container {
        padding: 0 0.5rem;
    }
}