/* ==========================================================================
   Ashburn Adventure Guide - Modern Stylesheet
   ========================================================================== */

/* CSS Variables for consistent theming */
:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #f59e0b;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --success-color: #10b981;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
}

/* ==========================================================================
   Base Styles
   ========================================================================== */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

/* ==========================================================================
   Navigation
   ========================================================================== */

.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

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

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

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

.nav-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 3px;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
    position: relative;
    height: 600px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-align: center;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.2);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    padding: 2rem;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.hero-stats .stat {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
}

.hero-stats .stat i {
    font-size: 1.5rem;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background-color: var(--accent-color);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-lg);
}

.download-btn:hover {
    background-color: #d97706;
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

/* ==========================================================================
   Sections
   ========================================================================== */

.section {
    padding: 4rem 1.5rem;
}

.section-alt {
    background-color: var(--bg-light);
}

.container {
    max-width: 1280px;
    margin: 0 auto;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 2rem;
    text-align: center;
}

.subsection-title {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
    margin-top: 2rem;
}

/* ==========================================================================
   Grid Layouts
   ========================================================================== */

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

/* ==========================================================================
   Cards
   ========================================================================== */

.card {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

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

.card-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
}

.card-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    z-index: 1;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
    position: relative;
    z-index: 2;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.card:hover .card-image img {
    transform: scale(1.05);
}

/* Fallback for broken images */
.card-image img[src=""],
.card-image img:not([src]),
.card-image img[src*="error"] {
    opacity: 0;
}

.card-content {
    padding: 1.5rem;
}

.card-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.card-subtitle {
    font-size: 0.95rem;
    color: var(--text-light);
    font-style: italic;
    margin-bottom: 1rem;
}

.card-content p {
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.card-content ul {
    margin-left: 1.5rem;
    color: var(--text-light);
}

.card-content ul li {
    margin-bottom: 0.5rem;
}

/* ==========================================================================
   Badges
   ========================================================================== */

.distance-badge,
.difficulty-badge {
    display: inline-block;
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.distance-badge {
    background-color: #dbeafe;
    color: #1e40af;
}

.difficulty-badge {
    margin-left: 0.5rem;
}

.difficulty-badge.easy {
    background-color: #d1fae5;
    color: #065f46;
}

.difficulty-badge.moderate {
    background-color: #fef3c7;
    color: #92400e;
}

.difficulty-badge.hard {
    background-color: #fee2e2;
    color: #991b1b;
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.card-links {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    min-width: 120px;
    text-align: center;
}

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

.btn-primary:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background-color: #e5e7eb;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ==========================================================================
   Callouts & Tip Boxes
   ========================================================================== */

.callout,
.tip-box {
    background-color: #eff6ff;
    border-left: 4px solid var(--primary-color);
    padding: 1rem 1.25rem;
    margin: 1.5rem 0;
    border-radius: var(--radius-md);
}

.callout h4 {
    margin-bottom: 0.75rem;
    color: var(--primary-color);
}

.tip-box {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    background-color: #fef3c7;
    border-left-color: var(--accent-color);
}

.tip-box i {
    font-size: 1.5rem;
    color: var(--accent-color);
    flex-shrink: 0;
}

/* ==========================================================================
   Itinerary Section
   ========================================================================== */

.itinerary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.itinerary-card {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border-top: 4px solid var(--primary-color);
}

.day-header {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: var(--radius-lg);
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.itinerary-card h3 {
    font-size: 1.75rem;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
}

.itinerary-item {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-light);
}

.itinerary-item:last-child {
    border-bottom: none;
}

.itinerary-item strong {
    color: var(--text-dark);
}

/* ==========================================================================
   Tables
   ========================================================================== */

.distance-table {
    overflow-x: auto;
    margin: 2rem 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

thead {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

th,
td {
    padding: 1rem 1.5rem;
    text-align: left;
}

th {
    font-weight: 700;
    font-size: 1.1rem;
}

tbody tr {
    border-bottom: 1px solid var(--border-color);
}

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

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

/* ==========================================================================
   Seasonal Events
   ========================================================================== */

.seasonal-events {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.event-month {
    background: var(--bg-white);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border-top: 3px solid var(--primary-color);
}

.event-month h4 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-weight: 700;
}

.event-month ul {
    list-style: none;
}

.event-month li {
    padding: 0.5rem 0;
    color: var(--text-light);
    border-bottom: 1px solid var(--border-color);
}

.event-month li:last-child {
    border-bottom: none;
}

/* ==========================================================================
   Insider Tips
   ========================================================================== */

.insider-tips {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.tip-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease;
}

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

.tip-card i {
    font-size: 2rem;
    margin-bottom: 0.75rem;
    opacity: 0.9;
}

.tip-card p {
    line-height: 1.6;
    margin: 0;
}

.tip-card strong {
    display: block;
    margin-bottom: 0.25rem;
    font-size: 1.1rem;
}

/* ==========================================================================
   Resources Section
   ========================================================================== */

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.resource-category {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.resource-category h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
}

.resource-category ul {
    list-style: none;
}

.resource-category li {
    margin-bottom: 0.75rem;
}

.resource-category a {
    color: var(--text-dark);
    text-decoration: none;
    transition: color 0.3s ease;
    display: inline-block;
}

.resource-category a:hover {
    color: var(--primary-color);
    transform: translateX(4px);
}

.resource-category a::before {
    content: '→ ';
    color: var(--primary-color);
    font-weight: 700;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    color: white;
    padding: 3rem 1.5rem;
    text-align: center;
}

.footer p {
    margin-bottom: 0.75rem;
}

.footer-tagline {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 1.5rem 0;
}

.footer-update {
    opacity: 0.7;
    font-size: 0.9rem;
}

/* ==========================================================================
   Scroll to Top Button
   ========================================================================== */

.scroll-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-lg);
    z-index: 999;
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}

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

/* ==========================================================================
   Responsive Design
   ========================================================================== */

@media (max-width: 768px) {
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        gap: 0;
        padding: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-menu.active {
        max-height: 500px;
    }

    .nav-menu li {
        border-bottom: 1px solid var(--border-color);
    }

    .nav-link {
        display: block;
        padding: 1rem 1.5rem;
    }

    .nav-link::after {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .hero-stats {
        flex-direction: column;
        gap: 1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .subsection-title {
        font-size: 1.5rem;
    }

    .grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .itinerary-grid {
        grid-template-columns: 1fr;
    }

    .resources-grid {
        grid-template-columns: 1fr;
    }

    .seasonal-events {
        grid-template-columns: 1fr;
    }

    .insider-tips {
        grid-template-columns: 1fr;
    }

    .scroll-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 45px;
        height: 45px;
        font-size: 1.25rem;
    }
}

@media (max-width: 480px) {
    .hero {
        height: 500px;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .section {
        padding: 3rem 1rem;
    }

    .card-content {
        padding: 1.25rem;
    }

    .download-btn {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
    .navbar,
    .scroll-to-top,
    .download-btn {
        display: none;
    }

    .section {
        page-break-inside: avoid;
    }

    .card {
        page-break-inside: avoid;
    }
}