/* ===============================================
   ZahnPROjekt Landing Page - Modern CSS
   =============================================== */

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

:root {
    --primary-blue: #7DB4D4;
    --dark-blue: #4A90B0;
    --light-blue: #A5CAE0;
    --gray-dark: #333333;
    --gray-medium: #666666;
    --gray-light: #F5F5F5;
    --white: #FFFFFF;
    --accent: #5BA3C7;
    
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --transition: all 0.3s ease;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.16);
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-body);
    color: var(--gray-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--gray-dark);
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-align: center;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--gray-medium);
    text-align: center;
    margin-bottom: 3rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 32px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    border-radius: 8px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--dark-blue));
    color: var(--white);
    box-shadow: var(--shadow-sm);
}

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

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

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

.btn-full {
    width: 100%;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.logo img {
    height: 50px;
    width: auto;
}

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

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-blue);
    transition: var(--transition);
}

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

.nav-link.cta-nav {
    background: var(--primary-blue);
    color: var(--white);
    padding: 8px 20px;
    border-radius: 6px;
}

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

.nav-link.cta-nav:hover {
    background: var(--dark-blue);
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--gray-dark);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-image {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(74, 144, 176, 0.85), rgba(125, 180, 212, 0.75));
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: var(--white);
    padding: 2rem;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-title .highlight {
    color: var(--white);
    position: relative;
    display: inline-block;
}

.hero-title .highlight::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--white);
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2.5rem;
    font-weight: 300;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Animations */
.fade-in {
    animation: fadeIn 1s ease-in;
}

.fade-in-delay {
    animation: fadeIn 1s ease-in 0.3s both;
}

.fade-in-delay-2 {
    animation: fadeIn 1s ease-in 0.6s both;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: -130px;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-indicator span {
    display: block;
    width: 20px;
    height: 30px;
    border: 2px solid var(--white);
    border-radius: 15px;
    position: relative;
}

.scroll-indicator span::after {
    content: '';
    position: absolute;
    top: 5px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--white);
    border-radius: 2px;
    animation: scroll 1.5s infinite;
}

@keyframes scroll {
    0% {
        top: 5px;
        opacity: 1;
    }
    100% {
        top: 15px;
        opacity: 0;
    }
}

/* Why Us Section */
.why-us {
    padding: 6rem 0;
    background: var(--white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.feature-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    margin-bottom: 1rem;
    display: flex;
    justify-content: center;
    align-items: center;
}

.feature-icon i,
.feature-icon svg {
    width: 48px;
    height: 48px;
    stroke: var(--primary-blue);
    stroke-width: 2;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--primary-blue);
}

.feature-card p {
    color: var(--gray-medium);
    line-height: 1.6;
}

.image-showcase {
    margin-top: 4rem;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.image-showcase img {
    width: 100%;
    height: auto;
    display: block;
}

/* Positions Section */
.positions {
    padding: 6rem 0;
    background: var(--gray-light);
}

.positions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.position-card {
    background: var(--white);
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

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

.position-header {
    margin-bottom: 1.5rem;
}

.position-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-blue), var(--dark-blue));
    color: var(--white);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.position-card h3 {
    font-size: 1.6rem;
    color: var(--gray-dark);
}

.position-content {
    margin: 2rem 0;
}

.position-section {
    margin-bottom: 1.5rem;
}

.position-section h4 {
    color: var(--primary-blue);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

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

.position-section ul li {
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: 0.5rem;
    color: var(--gray-medium);
}

.position-section ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-blue);
    font-weight: bold;
}

.position-section p {
    color: var(--gray-medium);
    line-height: 1.6;
}

.equipment-showcase {
    display: flex;
    align-items: center;
    gap: 3rem;
    background: var(--white);
    padding: 3rem;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
}

.equipment-showcase img {
    width: 40%;
    border-radius: 12px;
    object-fit: cover;
}

.equipment-text h4 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--gray-dark);
}

.equipment-text p {
    color: var(--gray-medium);
    font-size: 1.1rem;
    line-height: 1.6;
}

/* About Lab Section */
.about-lab {
    padding: 6rem 0;
    background: var(--white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    margin-bottom: 4rem;
}

.about-text h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: var(--primary-blue);
}

.about-text p {
    color: var(--gray-medium);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.about-highlights {
    display: flex;
    gap: 2rem;
    margin-top: 2rem;
}

.highlight-item {
    display: flex;
    flex-direction: column;
    text-align: center;
}

.highlight-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-blue);
    font-family: var(--font-heading);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 80px;
}

.highlight-number i,
.highlight-number svg {
    width: 60px;
    height: 60px;
    stroke: var(--primary-blue);
    stroke-width: 2.5;
}

.highlight-label {
    font-size: 0.9rem;
    color: var(--gray-medium);
    font-weight: 500;
}

.about-images {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

.about-image-main img,
.about-image-secondary img {
    width: 100%;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.team-section {
    background: var(--gray-light);
    padding: 3rem;
    border-radius: 16px;
}

.team-content {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 3rem;
    align-items: center;
}

.team-image img {
    width: 100%;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.team-text h3 {
    font-size: 1.6rem;
    margin-bottom: 1rem;
    color: var(--gray-dark);
}

.team-text p {
    color: var(--gray-medium);
    line-height: 1.8;
    margin-bottom: 1rem;
}

/* What We Offer Section */
.what-we-offer {
    padding: 6rem 0;
    background: var(--gray-light);
}

.offer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.offer-item {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

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

.offer-icon {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 1rem;
}

.offer-icon i,
.offer-icon svg {
    width: 40px;
    height: 40px;
    stroke: var(--primary-blue);
    stroke-width: 2;
}

.offer-item h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--gray-dark);
}

.offer-item p {
    color: var(--gray-medium);
    font-size: 0.95rem;
}

/* Contact Section */
.contact-section {
    padding: 6rem 0;
    background: var(--white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-intro h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--primary-blue);
}

.contact-intro p {
    color: var(--gray-medium);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 2rem;
}

.contact-info-box {
    background: var(--gray-light);
    padding: 2rem;
    border-radius: 12px;
}

.contact-detail {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    align-items: flex-start;
}

.contact-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-icon i,
.contact-icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--primary-blue);
    stroke-width: 2;
}

.contact-detail strong {
    display: block;
    color: var(--gray-dark);
    margin-bottom: 0.25rem;
}

.contact-detail a {
    color: var(--primary-blue);
    text-decoration: none;
    transition: var(--transition);
}

.contact-detail a:hover {
    color: var(--dark-blue);
}

.contact-detail p {
    color: var(--gray-medium);
    margin: 0;
}

/* Application Form */
.contact-form-wrapper {
    background: var(--gray-light);
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
}

.application-form h4 {
    font-size: 1.6rem;
    margin-bottom: 0.5rem;
    color: var(--gray-dark);
}

.form-description {
    color: var(--gray-medium);
    margin-bottom: 2rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

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

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--gray-dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #E0E0E0;
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
}

.form-group textarea {
    resize: vertical;
}

.form-note {
    font-size: 0.85rem;
    color: var(--gray-medium);
    margin-top: 1rem;
    text-align: center;
}

/* Footer */
.footer {
    background: var(--white);
    color: var(--gray-dark);
    padding: 4rem 0 2rem;
    border-top: 4px solid var(--primary-blue);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: -4px;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--dark-blue), var(--primary-blue));
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-logo {
    height: 60px;
    width: auto;
    margin-bottom: 1rem;
}

.footer-section h4 {
    color: var(--gray-dark);
    margin-bottom: 1rem;
    font-size: 1.1rem;
    font-weight: 600;
}

.footer-section p {
    color: var(--gray-medium);
    font-size: 0.95rem;
    line-height: 1.6;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: var(--gray-medium);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section a:hover {
    color: var(--primary-blue);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--gray-light);
}

.footer-bottom p {
    color: var(--gray-medium);
    font-size: 0.9rem;
}

/* Scroll to Top Button */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--primary-blue);
    color: var(--white);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    z-index: 999;
}

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

.scroll-top:hover {
    background: var(--dark-blue);
    transform: translateY(-4px);
}

/* AOS Animations */
[data-aos] {
    opacity: 0;
    transition-property: opacity, transform;
}

[data-aos].aos-animate {
    opacity: 1;
}

[data-aos="fade-up"] {
    transform: translateY(50px);
}

[data-aos="fade-up"].aos-animate {
    transform: translateY(0);
}

[data-aos="fade-right"] {
    transform: translateX(-50px);
}

[data-aos="fade-right"].aos-animate {
    transform: translateX(0);
}

[data-aos="fade-left"] {
    transform: translateX(50px);
}

[data-aos="fade-left"].aos-animate {
    transform: translateX(0);
}

[data-aos="zoom-in"] {
    transform: scale(0.9);
}

[data-aos="zoom-in"].aos-animate {
    transform: scale(1);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.8rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .team-content {
        grid-template-columns: 1fr;
    }
    
    .equipment-showcase {
        flex-direction: column;
    }
    
    .equipment-showcase img {
        width: 100%;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-md);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(7px, 7px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .positions-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .about-highlights {
        flex-direction: column;
        gap: 1rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero {
        min-height: 500px;
    }
    
    .hero-title {
        font-size: 1.6rem;
    }
    
    .section-title {
        font-size: 1.6rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 0.9rem;
    }
}