/* The NERD Developers Club - Professional Stylesheet */
/* Next-Level Experience & Revolution Development */

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

:root {
    /* Light theme colors */
    --glass-bg: rgba(255, 255, 255, 0.72);
    --glass-border: rgba(0, 0, 0, 0.08);
    --blur-amount: 30px;
    --primary-blue: #0071e3;
    --accent-purple: #bf5af2;
    --accent-green: #30d158;
    --accent-orange: #ff9f0a;
    --text-primary: #1d1d1f;
    --text-secondary: rgba(0, 0, 0, 0.56);
    --light-bg: #f5f5f7;
    --pure-white: #ffffff;
    --card-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
    --hover-shadow: 0 20px 60px rgba(0, 113, 227, 0.15);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
    background: var(--light-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Animated Gradient Background */
.background-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    background: linear-gradient(180deg, #ffffff 0%, #f5f5f7 50%, #e8e8ed 100%);
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.3;
    animation: float 20s ease-in-out infinite;
    mix-blend-mode: normal;
}

.orb-1 {
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(0, 113, 227, 0.4), transparent);
    top: -300px;
    left: -300px;
    animation-duration: 25s;
}

.orb-2 {
    width: 1000px;
    height: 1000px;
    background: radial-gradient(circle, rgba(191, 90, 242, 0.3), transparent);
    bottom: -400px;
    right: -400px;
    animation-duration: 30s;
    animation-delay: 5s;
}

.orb-3 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(48, 209, 88, 0.25), transparent);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-duration: 35s;
    animation-delay: 10s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(100px, -50px) scale(1.1);
    }
    50% {
        transform: translate(-50px, 100px) scale(0.9);
    }
    75% {
        transform: translate(-100px, -30px) scale(1.05);
    }
}

/* Glass Navigation */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.3s ease;
}

header.scrolled {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-amount));
    -webkit-backdrop-filter: blur(var(--blur-amount));
    border-bottom: 1px solid var(--glass-border);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    text-decoration: none;
    transition: transform 0.3s ease;
}

.logo-link:hover {
    transform: scale(1.02);
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-main {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.logo-sub {
    font-size: 0.7rem;
    color: var(--text-secondary);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-top: -2px;
}

.nav-center {
    display: flex;
    gap: 1rem;
    list-style: none;
    flex: 1;
    justify-content: center;
}

.nav-links {
    display: flex;
    gap: 0.5rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.7rem 1.2rem;
    border-radius: 100px;
    transition: all 0.3s ease;
    font-weight: 500;
    font-size: 0.95rem;
}

.nav-links a:hover {
    background: rgba(0, 0, 0, 0.04);
    color: var(--text-primary);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.lang-switcher {
    display: flex;
    background: rgba(0, 0, 0, 0.04);
    border: 1px solid var(--glass-border);
    border-radius: 100px;
    padding: 0.2rem;
}

.lang-btn {
    padding: 0.5rem 1rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 100px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

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

.cta-nav {
    padding: 0.7rem 1.5rem;
    background: var(--primary-blue);
    color: white;
    text-decoration: none;
    border-radius: 100px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.cta-nav:hover {
    background: #0051a2;
    transform: scale(1.05);
    box-shadow: 0 8px 20px rgba(0, 113, 227, 0.3);
}

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    background: rgba(0, 0, 0, 0.04);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 100px;
    font-size: 1.2rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8rem 2rem 4rem;
    position: relative;
}

.hero-content {
    text-align: center;
    max-width: 1200px;
    z-index: 10;
}

.acronym-reveal {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    opacity: 0;
    animation: fadeInUp 1s ease forwards;
}

.acronym-highlight {
    color: var(--primary-blue);
    font-weight: 700;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
    from {
        opacity: 0;
        transform: translateY(20px);
    }
}

.hero h1 {
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #1d1d1f 0%, #86868b 50%, #1d1d1f 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -2px;
    line-height: 1.1;
}

.hero .tagline {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    margin-bottom: 3rem;
    color: var(--text-secondary);
    font-weight: 400;
    letter-spacing: -0.5px;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.btn {
    padding: 1rem 2.5rem;
    text-decoration: none;
    border-radius: 100px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    display: inline-block;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--primary-blue);
    color: white;
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.btn-primary:hover::before {
    transform: translateX(100%);
}

.btn-primary:hover {
    transform: scale(1.05);
    box-shadow: 0 12px 30px rgba(0, 113, 227, 0.3);
}

.btn-secondary {
    background: var(--pure-white);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.btn-secondary:hover {
    background: var(--glass-bg);
    transform: scale(1.05);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

/* Services Section */
.services {
    padding: 8rem 2rem;
    position: relative;
    background: var(--pure-white);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    margin-bottom: 1rem;
    font-weight: 700;
    background: linear-gradient(135deg, #1d1d1f 0%, #86868b 50%, #1d1d1f 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -1px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 5rem;
    font-size: 1.2rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 3rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    box-shadow: var(--card-shadow);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 113, 227, 0.3), transparent);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--hover-shadow);
    background: rgba(255, 255, 255, 0.9);
}

.service-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-purple));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 600;
    letter-spacing: -0.5px;
}

.service-card p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 2rem;
}

.service-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.service-features li {
    color: var(--text-secondary);
    padding-left: 1.5rem;
    position: relative;
    font-size: 0.95rem;
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-green);
    font-weight: bold;
}

/* About Section */
.about {
    padding: 8rem 2rem;
    position: relative;
    background: var(--light-bg);
}

.about-container {
    max-width: 1000px;
    margin: 0 auto;
    text-align: center;
}

.about-content {
    margin-bottom: 3rem;
}

.about-content h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 2rem;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    letter-spacing: -1px;
}

.about-content p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    max-width: 700px;
    margin: 0 auto;
}

.stat-card {
    background: var(--pure-white);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.stat-card:hover {
    transform: scale(1.05);
    box-shadow: 0 12px 30px rgba(0, 113, 227, 0.15);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-green), var(--accent-orange));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-secondary);
    margin-top: 0.5rem;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Technologies Section */
.technologies {
    padding: 8rem 2rem;
    position: relative;
    background: var(--pure-white);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1.5rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.tech-item:hover {
    transform: scale(1.1);
    background: var(--pure-white);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.tech-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.tech-name {
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-align: center;
}

/* Contact Section */
.contact {
    padding: 8rem 2rem;
    position: relative;
    background: var(--light-bg);
}

.contact-container {
    max-width: 600px;
    margin: 0 auto;
}

.contact-grid {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3rem;
    margin-top: 4rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    width: 100%;
    max-width: 500px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.contact-item:hover {
    box-shadow: 0 8px 20px rgba(0, 113, 227, 0.12);
    transform: translateX(10px);
}

.contact-item-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, rgba(191, 90, 242, 0.15), rgba(191, 90, 242, 0.25));
    border: 1px solid rgba(191, 90, 242, 0.2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-item-content h4 {
    color: var(--text-primary);
    margin-bottom: 0.3rem;
    font-size: 1rem;
}

.contact-item-content p,
.contact-item-content a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
}

.contact-item-content a:hover {
    color: var(--primary-blue);
}

/* Footer */
footer {
    padding: 4rem 2rem 2rem;
    border-top: 1px solid var(--glass-border);
    background: var(--pure-white);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-brand h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    white-space: nowrap;
}

.footer-brand p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
    white-space: nowrap;
}

.footer-social {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(0, 0, 0, 0.04);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: var(--primary-blue);
    color: white;
    transform: scale(1.1);
}

.footer-column {
    display: flex;
    align-items: baseline;
    gap: 1rem;
}

.footer-column h4 {
    color: var(--text-primary);
    margin-bottom: 0;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    white-space: nowrap;
}

.footer-column ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-column ul li {
    margin-bottom: 0;
}

.footer-column ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
    white-space: nowrap;
}

.footer-column ul li a:hover {
    color: var(--primary-blue);
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Language specific content */
.lang-content {
    display: none;
}

.lang-content.active {
    display: block;
}

/* Impressum & Datenschutz Modal */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
    z-index: 2000;
    overflow-y: auto;
}

.modal-overlay.active {
    display: block;
}

.modal-content {
    position: relative;
    max-width: 900px;
    margin: 4rem auto;
    padding: 3rem;
    background: var(--pure-white);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    color: var(--text-primary);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.modal-close {
    position: absolute;
    top: 2rem;
    right: 2rem;
    background: var(--primary-blue);
    color: white;
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.modal-close:hover {
    transform: scale(1.1);
    background: #0051a2;
}

.modal-content h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.modal-content h3 {
    font-size: 1.5rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.modal-content h4 {
    font-size: 1.2rem;
    margin-top: 1.5rem;
    margin-bottom: 0.8rem;
    color: var(--text-primary);
}

.modal-content p,
.modal-content address,
.modal-content ul {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
    font-style: normal;
}

.modal-content ul {
    padding-left: 2rem;
}

.modal-content a {
    color: var(--primary-blue);
    text-decoration: none;
}

.modal-content a:hover {
    text-decoration: underline;
}

.footer-links-container {
    display: flex;
    flex-wrap: nowrap;
    gap: 3rem;
    align-items: baseline;
    overflow-x: visible;
}

/* Desktop-specific footer styles */
@media (min-width: 1025px) {
    .footer-content {
        grid-template-columns: minmax(400px, 1fr) minmax(800px, 3fr);
    }
    
    .footer-brand p {
        white-space: nowrap;
    }
}

/* Mobile Responsive */
@media (max-width: 1024px) {
    body {
        overflow-x: hidden;
    }

    .about-stats {
        grid-template-columns: 1fr;
    }

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

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 0 1rem;
    }

    .footer-links-container {
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
        overflow-x: visible;
    }

    .footer-brand {
        margin-bottom: 1rem;
    }

    .footer-brand p {
        white-space: normal;
        word-wrap: break-word;
    }

    .footer-column {
        flex-direction: column;
        gap: 0.5rem;
    }

    .footer-column ul {
        flex-direction: column;
        gap: 0.5rem;
        padding-left: 1rem;
    }
}

@media (max-width: 768px) {
    .nav-center {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--glass-bg);
        backdrop-filter: blur(var(--blur-amount));
        flex-direction: column;
        padding: 1rem;
        gap: 0.5rem;
    }

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

    .hero h1 {
        font-size: 3rem;
    }

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

    .about-stats {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        font-size: 0.9rem;
        padding: 0 1rem;
    }

    .footer-links-container {
        flex-direction: column;
        gap: 1rem;
    }

    .footer-brand h3 {
        font-size: 1.2rem;
    }

    .footer-brand p {
        font-size: 0.9rem;
        line-height: 1.5;
    }

    .footer-column {
        flex-direction: column;
        gap: 0.5rem;
    }

    .footer-column h4 {
        font-size: 0.9rem;
    }

    .footer-column ul {
        flex-direction: column;
        gap: 0.5rem;
        padding-left: 1rem;
    }

    .footer-column ul li a {
        font-size: 0.85rem;
    }

    .modal-content {
        margin: 1rem;
        padding: 2rem;
    }

    /* Fix für horizontales Scrolling auf Mobile */
    html, body {
        overflow-x: hidden;
        max-width: 100%;
    }

    .contact-item {
        padding: 1rem;
    }

    .service-card {
        padding: 2rem;
    }
}