/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Farben */
    --color-primary: #2c3e50; /* Anthrazit/Schiefergrau */
    --color-accent: #c0392b; /* Ziegelrot */
    --color-accent-light: #e74c3c; /* Helles Orange-Rot */
    --color-secondary: #ecf0f1; /* Helles Grau */
    --color-white: #ffffff;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-border: #ddd;
    
    /* Typografie */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    /* Abstände */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Container */
    --container-max-width: 1200px;
    --container-padding: 1.5rem;
    
    /* Transitions */
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-text);
    background-color: var(--color-white);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

ul {
    list-style: none;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.section {
    padding: var(--spacing-xl) 0;
}

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

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-light);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: var(--color-accent-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(192, 57, 43, 0.3);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-white);
    border: 2px solid var(--color-white);
}

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

/* ============================================
   HEADER & NAVIGATION
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(44, 62, 80, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    background-color: rgba(44, 62, 80, 0.98);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem var(--container-padding);
    max-width: var(--container-max-width);
    margin: 0 auto;
}

.nav-logo a {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    transition: var(--transition);
}

.nav-logo a:hover {
    transform: translateY(-1px);
}

.logo-text {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-white);
    letter-spacing: 1.5px;
    line-height: 1.1;
}

.logo-subtitle {
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--color-accent);
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-top: 2px;
}

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

.nav-link {
    color: var(--color-white);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 1rem;
    position: relative;
    transition: var(--transition);
    border-radius: 4px;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--color-accent);
    background-color: rgba(192, 57, 43, 0.1);
}

.nav-link:hover::before,
.nav-link.active::before {
    width: 80%;
}

.nav-cta {
    background-color: var(--color-accent);
    color: var(--color-white) !important;
    padding: 0.6rem 1.5rem !important;
    border-radius: 6px;
    font-weight: 600;
    margin-left: var(--spacing-sm);
    transition: var(--transition);
}

.nav-cta::before {
    display: none;
}

.nav-cta:hover {
    background-color: var(--color-accent-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(192, 57, 43, 0.3);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.nav-toggle span {
    width: 28px;
    height: 3px;
    background-color: var(--color-white);
    border-radius: 2px;
    transition: var(--transition);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, #34495e 100%);
    background-image: url('Bilder/01-hero-hintergrund.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: var(--color-white);
    text-align: center;
    padding-top: 80px;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(44, 62, 80, 0.7);
}

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

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.hero-features {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--spacing-lg);
}

.hero-feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.95rem;
}

.hero-icon {
    width: 24px;
    height: 24px;
    background-color: var(--color-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.875rem;
}

/* ============================================
   SERVICES SECTION
   ============================================ */
.services {
    background-color: var(--color-secondary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.service-card {
    background-color: var(--color-white);
    padding: var(--spacing-md);
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.service-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-sm);
    color: var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(192, 57, 43, 0.1);
    border-radius: 12px;
    transition: var(--transition);
}

.service-icon svg {
    width: 36px;
    height: 36px;
    stroke: var(--color-accent);
}

.service-card:hover .service-icon {
    background-color: var(--color-accent);
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(192, 57, 43, 0.2);
}

.service-card:hover .service-icon svg {
    stroke: var(--color-white);
}

.service-card h3 {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.service-link {
    color: var(--color-accent);
    font-weight: 600;
    display: inline-block;
    margin-top: var(--spacing-xs);
}

.service-link:hover {
    color: var(--color-accent-light);
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about {
    background-color: var(--color-white);
}

.about-content {
    max-width: 1000px;
    margin: 0 auto;
}

.about-text {
    margin-bottom: var(--spacing-lg);
}

.about-text p {
    margin-bottom: var(--spacing-sm);
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-text);
}

.about-text strong {
    color: var(--color-primary);
    font-weight: 600;
}

.about-team {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.team-card {
    background-color: var(--color-secondary);
    padding: var(--spacing-md);
    border-radius: 8px;
    text-align: center;
}

.team-avatar {
    width: 100px;
    height: 100px;
    background-color: var(--color-primary);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    margin: 0 auto var(--spacing-sm);
    overflow: hidden;
}

.team-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    display: block;
}

.team-card h3 {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.team-role {
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.team-bio {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

/* ============================================
   WHY US SECTION
   ============================================ */
.why-us {
    background-color: var(--color-secondary);
}

.why-us-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.why-us-card {
    background-color: var(--color-white);
    padding: var(--spacing-md);
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.why-us-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.why-us-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-sm);
    color: var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(192, 57, 43, 0.1);
    border-radius: 12px;
    transition: var(--transition);
}

.why-us-icon svg {
    width: 36px;
    height: 36px;
    stroke: var(--color-accent);
}

.why-us-card:hover .why-us-icon {
    background-color: var(--color-accent);
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(192, 57, 43, 0.2);
}

.why-us-card:hover .why-us-icon svg {
    stroke: var(--color-white);
}

.why-us-card h3 {
    font-size: 1.25rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.why-us-card p {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

/* ============================================
   REFERENCES SECTION
   ============================================ */
.references {
    background-color: var(--color-white);
}

.references-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.reference-card {
    background-color: var(--color-white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.reference-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.reference-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-primary) 0%, #34495e 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.reference-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.reference-placeholder {
    color: var(--color-white);
    font-size: 1.125rem;
    opacity: 0.7;
}

.reference-info {
    padding: var(--spacing-md);
}

.reference-info h3 {
    font-size: 1.25rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.reference-location {
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.reference-info p {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

/* ============================================
   PROCESS SECTION
   ============================================ */
.process {
    background-color: var(--color-secondary);
}

.process-timeline {
    max-width: 900px;
    margin: var(--spacing-lg) auto 0;
    position: relative;
}

.process-step {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.process-step:last-child {
    margin-bottom: 0;
}

.process-number {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background-color: var(--color-accent);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
}

.process-step h3 {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.process-step p {
    color: var(--color-text-light);
    line-height: 1.8;
}

/* ============================================
   FAQ SECTION
   ============================================ */
.faq {
    background-color: var(--color-white);
}

.faq-list {
    max-width: 800px;
    margin: var(--spacing-lg) auto 0;
}

.faq-item {
    background-color: var(--color-secondary);
    border-radius: 8px;
    margin-bottom: var(--spacing-sm);
    overflow: hidden;
}

.faq-question {
    padding: var(--spacing-md);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq-question:hover {
    background-color: rgba(44, 62, 80, 0.05);
}

.faq-question h3 {
    font-size: 1.125rem;
    color: var(--color-primary);
    font-weight: 600;
}

.faq-icon {
    font-size: 1.5rem;
    color: var(--color-accent);
    font-weight: 300;
    transition: var(--transition);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 var(--spacing-md) var(--spacing-md);
    color: var(--color-text-light);
    line-height: 1.8;
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact {
    background-color: var(--color-secondary);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.contact-info {
    background-color: var(--color-white);
    padding: var(--spacing-md);
    border-radius: 8px;
    height: fit-content;
}

.contact-info h3 {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.contact-item {
    margin-bottom: var(--spacing-md);
}

.contact-item strong {
    display: block;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
    font-size: 0.95rem;
}

.contact-item p {
    color: var(--color-text-light);
    line-height: 1.8;
}

.contact-item a {
    color: var(--color-accent);
}

.contact-item a:hover {
    color: var(--color-accent-light);
    text-decoration: underline;
}

.contact-form {
    background-color: var(--color-white);
    padding: var(--spacing-md);
    border-radius: 8px;
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-family: var(--font-family);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(192, 57, 43, 0.1);
}

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-xs);
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    margin-top: 0.25rem;
}

.checkbox-group label {
    margin-bottom: 0;
    font-weight: 400;
    font-size: 0.95rem;
}

.checkbox-group a {
    color: var(--color-accent);
}

.contact-map {
    margin-top: var(--spacing-lg);
}

.map-placeholder {
    background-color: var(--color-secondary);
    padding: var(--spacing-xl);
    text-align: center;
    border-radius: 8px;
    color: var(--color-text-light);
}

.map-note {
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
    font-style: italic;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.footer-col h3,
.footer-col h4 {
    margin-bottom: var(--spacing-sm);
    font-size: 1.125rem;
}

.footer-col p {
    margin-bottom: var(--spacing-xs);
    font-size: 0.95rem;
    opacity: 0.9;
    line-height: 1.8;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-col a {
    color: var(--color-white);
    opacity: 0.9;
    transition: var(--transition);
}

.footer-col a:hover {
    opacity: 1;
    color: var(--color-accent);
}

.footer-social {
    margin-bottom: var(--spacing-sm);
}

.footer-note {
    font-size: 0.875rem;
    opacity: 0.8;
    margin-top: var(--spacing-sm);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.875rem;
    opacity: 0.8;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
    :root {
        --container-padding: 1rem;
        --spacing-xl: 3rem;
        --spacing-lg: 2rem;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100vh;
        background-color: rgba(44, 62, 80, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        padding: 5rem var(--spacing-md) var(--spacing-md);
        transition: var(--transition);
        box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
        justify-content: flex-start;
        gap: 0;
    }
    
    .nav-menu li {
        width: 100%;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .nav-menu li:last-child {
        border-bottom: none;
        margin-top: var(--spacing-sm);
    }
    
    .nav-link {
        display: block;
        padding: 1rem;
        width: 100%;
        text-align: left;
        font-size: 1.125rem;
    }
    
    .nav-link::before {
        display: none;
    }
    
    .nav-cta {
        margin-left: 0;
        text-align: center;
        width: 100%;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .logo-text {
        font-size: 1.5rem;
    }
    
    .logo-subtitle {
        font-size: 0.7rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .why-us-grid {
        grid-template-columns: 1fr;
    }
    
    .references-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    
    .process-step {
        flex-direction: column;
        text-align: center;
    }
    
    .process-number {
        margin: 0 auto var(--spacing-sm);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .hero-features {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}