/* ==========================================================================
   Walldorf.net - Main Stylesheet
   Production-ready CSS with responsive design
   ========================================================================== */

/* CSS Variables for consistent theming */
:root {
    --primary-color: #003d7a;
    --secondary-color: #0066cc;
    --accent-color: #ffa500;
    --text-dark: #1a1a1a;
    --text-light: #4a4a4a;
    --text-muted: #767676;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --border-color: #e0e0e0;
    --success-color: #28a745;
    --error-color: #dc3545;

    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-serif: Georgia, 'Times New Roman', serif;

    --max-width: 1200px;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;

    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.2);

    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

/* Reset and Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--bg-white);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--text-dark);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
}

h2 {
    font-size: 2rem;
    margin-top: var(--spacing-lg);
}

h3 {
    font-size: 1.5rem;
    margin-top: var(--spacing-lg);
}

h4 {
    font-size: 1.25rem;
}

h5 {
    font-size: 1.125rem;
}

h6 {
    font-size: 1rem;
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-light);
}

a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

/* Layout Components */
.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

.header-top {
    background-color: rgba(0, 0, 0, 0.2);
    padding: var(--spacing-sm) 0;
}

.header-top .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
}

.header-contact a {
    color: white;
    margin-left: var(--spacing-md);
    opacity: 0.9;
}

.header-contact a:hover {
    opacity: 1;
    text-decoration: none;
}

.header-main {
    padding: var(--spacing-md) 0;
}

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

.logo {
    font-size: 1.75rem;
    font-weight: 800;
    color: white;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo:hover {
    color: white;
    text-decoration: none;
    opacity: 0.9;
}

/* Navigation */
.nav {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--spacing-sm);
    margin: 0;
    padding: 0;
}

.nav-list a {
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 4px;
    transition: background-color var(--transition-fast);
    font-weight: 500;
}

.nav-list a:hover,
.nav-list a.active {
    background-color: rgba(255, 255, 255, 0.2);
    text-decoration: none;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--spacing-sm);
}

/* Container */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.hero h1 {
    color: white;
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.hero p {
    color: rgba(255, 255, 255, 0.95);
    font-size: 1.25rem;
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
}

.hero-cta {
    display: inline-block;
    background-color: var(--accent-color);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: 4px;
    font-weight: 600;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.hero-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    text-decoration: none;
}

/* Breadcrumb */
.breadcrumb {
    background-color: var(--bg-light);
    padding: var(--spacing-md) 0;
    font-size: 0.875rem;
}

.breadcrumb-list {
    list-style: none;
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.breadcrumb-list li:not(:last-child)::after {
    content: '›';
    margin-left: var(--spacing-sm);
    color: var(--text-muted);
}

/* Main Content */
.main-content {
    padding: var(--spacing-xl) 0;
    min-height: 60vh;
}

.content-wrapper {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--spacing-lg);
}

.content-main {
    min-width: 0;
}

/* Sidebar */
.sidebar {
    background-color: var(--bg-light);
    padding: var(--spacing-lg);
    border-radius: 8px;
    height: fit-content;
    position: sticky;
    top: 100px;
}

.sidebar h3 {
    font-size: 1.25rem;
    margin-top: 0;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary-color);
}

.sidebar ul {
    list-style: none;
    padding: 0;
}

.sidebar ul li {
    margin-bottom: var(--spacing-sm);
}

.sidebar ul li a {
    display: block;
    padding: var(--spacing-sm);
    border-radius: 4px;
    transition: background-color var(--transition-fast);
}

.sidebar ul li a:hover {
    background-color: white;
    text-decoration: none;
}

/* Cards */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.card {
    background-color: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

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

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

.card-content {
    padding: var(--spacing-lg);
}

.card-title {
    margin-top: 0;
    margin-bottom: var(--spacing-sm);
}

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

.card-link {
    display: inline-block;
    margin-top: var(--spacing-md);
    font-weight: 600;
}

/* Info Boxes */
.info-box {
    background-color: var(--bg-light);
    border-left: 4px solid var(--primary-color);
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    border-radius: 4px;
}

.info-box.warning {
    border-left-color: var(--accent-color);
    background-color: #fff9e6;
}

.info-box.success {
    border-left-color: var(--success-color);
    background-color: #e8f5e9;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-lg) 0;
    background-color: white;
}

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

th {
    background-color: var(--bg-light);
    font-weight: 600;
    color: var(--text-dark);
}

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

/* Forms */
.form-group {
    margin-bottom: var(--spacing-lg);
}

label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}

input[type="text"],
input[type="email"],
input[type="tel"],
textarea,
select {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

textarea {
    min-height: 150px;
    resize: vertical;
}

button,
.btn {
    background-color: var(--primary-color);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
    display: inline-block;
}

button:hover,
.btn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-1px);
    text-decoration: none;
}

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

.btn-secondary:hover {
    background-color: #ff8c00;
}

/* Footer */
.footer {
    background-color: var(--text-dark);
    color: white;
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-section h4 {
    color: white;
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
}

.footer-section ul {
    list-style: none;
    padding: 0;
}

.footer-section ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-fast);
}

.footer-section a:hover {
    color: white;
    text-decoration: none;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

/* Map Container */
.map-container {
    height: 400px;
    margin: var(--spacing-lg) 0;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

/* Timeline */
.timeline {
    position: relative;
    padding: var(--spacing-lg) 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50px;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--border-color);
}

.timeline-item {
    position: relative;
    padding-left: 100px;
    margin-bottom: var(--spacing-xl);
}

.timeline-marker {
    position: absolute;
    left: 41px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: var(--primary-color);
    border: 3px solid white;
    box-shadow: var(--shadow-sm);
}

.timeline-year {
    position: absolute;
    left: 0;
    font-weight: 700;
    color: var(--primary-color);
}

.timeline-content {
    background-color: var(--bg-light);
    padding: var(--spacing-lg);
    border-radius: 8px;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.mt-0 { margin-top: 0 !important; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.hidden {
    display: none;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
    border: 0;
}

/* Responsive Design */
@media (max-width: 968px) {
    .content-wrapper {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
        order: -1;
    }

    .timeline::before {
        left: 30px;
    }

    .timeline-item {
        padding-left: 70px;
    }

    .timeline-marker {
        left: 21px;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

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

    .nav-list {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
        padding: var(--spacing-md);
        box-shadow: var(--shadow-md);
    }

    .nav-list.active {
        display: flex;
    }

    .nav-toggle {
        display: block;
    }

    .header-content {
        position: relative;
    }

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

    .footer-content {
        grid-template-columns: 1fr;
    }

    .footer-links {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-xl: 2rem;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

    .hero {
        padding: var(--spacing-lg) 0;
    }
}

/* Print Styles */
@media print {
    .header,
    .nav,
    .sidebar,
    .footer,
    .breadcrumb {
        display: none;
    }

    .main-content {
        padding: 0;
    }

    .content-wrapper {
        grid-template-columns: 1fr;
    }

    a {
        text-decoration: underline;
    }
}