/* ===== CSS Reset & Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #0ea5e9;
    --success-color: #10b981;
    --background: #f8fafc;
    --surface: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --text-tertiary: #94a3b8;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --transition: all 0.2s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* ===== Top Navigation ===== */
.top-nav {
    background: var(--surface);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--text-primary);
}

.brand-icon {
    width: 32px;
    height: 32px;
    color: var(--primary-color);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 0.25rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== Container ===== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* ===== Toolbar (Search & Filters) ===== */
.toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
    align-items: center;
}

.search-wrapper {
    position: relative;
    flex: 1;
    min-width: 250px;
}

.search-wrapper .search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    color: var(--text-tertiary);
    pointer-events: none;
}

#search-input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 3rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 0.9375rem;
    font-family: inherit;
    background: var(--surface);
    color: var(--text-primary);
    transition: var(--transition);
}

#search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

#search-input::placeholder {
    color: var(--text-tertiary);
}

.filter-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.filter-btn,
.map-toggle-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1rem;
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.filter-btn svg,
.map-toggle-btn svg {
    width: 18px;
    height: 18px;
}

.filter-btn:hover,
.map-toggle-btn:hover {
    background: var(--background);
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-1px);
}

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

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

.map-toggle-btn:hover {
    background: var(--primary-dark);
    color: white;
}

/* ===== Map Container ===== */
.map-container {
    position: relative;
    height: 0;
    overflow: hidden;
    border-radius: var(--radius-xl);
    margin-bottom: 2rem;
    box-shadow: var(--shadow-lg);
    transition: height 0.3s ease;
}

.map-container.active {
    height: 500px;
}

#map {
    width: 100%;
    height: 100%;
    border-radius: var(--radius-xl);
}

.map-close-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface);
    border: none;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    cursor: pointer;
    z-index: 1000;
    transition: var(--transition);
}

.map-close-btn svg {
    width: 20px;
    height: 20px;
    color: var(--text-primary);
}

.map-close-btn:hover {
    background: var(--background);
    transform: scale(1.05);
}

/* ===== Cards Grid ===== */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    background: var(--surface);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    cursor: pointer;
}

.card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

.card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    display: block;
}

.card-content {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.card-description {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.6;
    flex: 1;
}

.card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.card-popularity,
.card-date,
.card-distance {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    padding: 0.25rem 0.75rem;
    background: var(--background);
    border-radius: var(--radius-md);
}

.card-buttons {
    display: flex;
    gap: 0.75rem;
    margin-top: auto;
}

.view-on-map-button,
.open-model-link {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    text-align: center;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-family: inherit;
}

.view-on-map-button {
    background: var(--background);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.view-on-map-button:hover {
    background: var(--surface);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.open-model-link {
    background: var(--primary-color);
    color: white;
}

.open-model-link:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

/* ===== Footer ===== */
.footer {
    background: var(--surface);
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
    padding: 2rem 0;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1.5rem;
    text-align: center;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.social-link {
    display: block;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.social-link:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.social-link img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.copyright {
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .container {
        padding: 1.5rem 1rem;
    }

    .nav-container {
        padding: 1rem;
    }

    .brand-text {
        font-size: 1.125rem;
    }

    .mobile-toggle {
        display: flex;
    }

    .toolbar {
        gap: 0.75rem;
    }

    .search-wrapper {
        width: 100%;
        order: -1;
    }

    .filter-group {
        width: 100%;
        justify-content: space-between;
    }

    .filter-btn span {
        display: none;
    }

    .filter-btn,
    .map-toggle-btn {
        flex: 1;
        justify-content: center;
        padding: 0.625rem 0.75rem;
    }

    .map-toggle-btn {
        width: 100%;
    }

    .map-container.active {
        height: 400px;
    }

    .cards-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

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

    .view-on-map-button,
    .open-model-link {
        width: 100%;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .cards-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}

@media (min-width: 1400px) {
    .cards-grid {
        grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    }
}

/* ===== Accessibility ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
button:focus-visible,
a:focus-visible,
input:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}