/* --- 0. Grundlegende Einstellungen & Variablen --- */
:root {
    /* Modernes Farbschema für IT-Dienstleister */
    --primary-color: #2563eb;       /* Primäres Blau */
    --secondary-color: #3b82f6;     /* Sekundäres Blau */
    --accent-color: #10b981;        /* Akzent Grün */
    --text-dark: #1e293b;           /* Dunkles Blau-Grau für Text */
    --text-light: #f8fafc;          /* Heller Text */
    --bg-light: #ffffff;            /* Weißer Hintergrund */
    --bg-gray: #f1f5f9;             /* Sehr helles Grau-Blau */
    --bg-dark: #1e293b;             /* Dunkler Hintergrund */
    --border-color: #e2e8f0;        /* Rahmenfarbe */

    /* Typografie */
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Open Sans', sans-serif;
    --font-size-base: 16px;

    /* Abstände */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 32px;
    --spacing-lg: 64px;
    --section-padding: 100px;

    /* Schatten */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);

    /* Übergänge */
    --transition-speed-fast: 0.2s;
    --transition-speed-normal: 0.3s;
    --transition-speed-slow: 0.5s;
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- 1. Globales Reset & Basis-Styles --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-body);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-light);
    -webkit-font-smoothing: antialiased;
    scroll-behavior: smooth;
    overflow-x: hidden;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: all var(--transition-speed-normal) var(--ease-in-out);
}

a:hover {
    color: var(--secondary-color);
}

ul {
    list-style: none;
}

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

/* --- 2. Container und Sektionen --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    position: relative;
    z-index: 1;
}

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

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

.bg-gray {
    background-color: var(--bg-gray);
}

.bg-dark {
    background-color: var(--bg-dark);
    color: var(--text-light);
}

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

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

/* --- 3. Typografie --- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}

.bg-dark h1, 
.bg-dark h2, 
.bg-dark h3, 
.bg-dark h4, 
.bg-dark h5, 
.bg-dark h6 {
    color: var(--text-light);
}

h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
}

h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
}

h3 {
    font-size: 1.75rem;
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
    opacity: 0.9;
}

.bg-dark p {
    color: var(--text-light);
    opacity: 0.85;
}

/* --- 4. Buttons --- */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 50px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    text-align: center;
    transition: all var(--transition-speed-normal) var(--ease-in-out);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--text-light);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-primary::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.7s var(--ease-in-out);
    z-index: -1;
}

.btn-primary:hover::after {
    left: 100%;
}

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

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: var(--text-light);
    transform: translateY(-2px);
}

/* --- 5. Header (Navigation) --- */
.main-header {
    background-color: rgba(255, 255, 255, 0.98);
    padding: var(--spacing-sm) 0;
    position: sticky;
    top: 0;
    width: 100%;
    z-index: 1000;
    backdrop-filter: blur(8px);
    box-shadow: var(--shadow-sm);
}

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

.logo a {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-dark);
}

.logo img {
    height: 40px;
    width: auto;
}

.logo h1 {
    font-size: 1.75rem;
    margin-bottom: 0;
    color: var(--primary-color);
    font-weight: 700;
}

.main-nav ul {
    display: flex;
    gap: var(--spacing-md);
}

.main-nav a {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    padding: 8px 0;
    position: relative;
    color: var(--text-dark);
}

.main-nav a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-color);
    transition: width var(--transition-speed-normal) var(--ease-in-out);
}

.main-nav a:hover::after,
.main-nav a.active::after {
    width: 100%;
}

.language-switcher {
    display: flex;
    gap: 8px;
}

.lang-button {
    background: none;
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: 50px;
    cursor: pointer;
    font-family: var(--font-heading);
    font-size: 0.9rem;
    color: var(--text-dark);
    transition: all var(--transition-speed-normal) var(--ease-in-out);
}

.lang-button:hover:not(.active) {
    background-color: var(--bg-gray);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.lang-button.active {
    background-color: var(--primary-color);
    color: var(--text-light);
    border-color: var(--primary-color);
    cursor: default;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-dark);
    transition: transform var(--transition-speed-normal) ease;
}

/* --- 6. Hero Sektion --- */
.hero-section {
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.9) 0%, rgba(15, 23, 42, 0.95) 100%), 
                url('img/tech-bg.jpg') no-repeat center center/cover;
    color: var(--text-light);
    text-align: center;
    padding: calc(var(--section-padding) * 1.5) 0;
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('img/particles.png');
    background-size: cover;
    opacity: 0.15;
    animation: particleMove 20s linear infinite;
    z-index: 0;
}

.hero-section .container {
    position: relative;
    z-index: 2;
}

.hero-section h1 {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-light);
    animation: fadeInSlideUp 0.8s var(--ease-in-out) forwards;
}

.hero-section p {
    font-size: 1.25rem;
    max-width: 700px;
    margin: 0 auto var(--spacing-lg) auto;
    color: rgba(255, 255, 255, 0.9);
    animation: fadeInSlideUp 0.8s var(--ease-in-out) 0.2s forwards;
}

.hero-section .btn {
    animation: fadeInSlideUp 0.8s var(--ease-in-out) 0.4s forwards;
}

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

@keyframes particleMove {
    0% { background-position: 0 0; }
    100% { background-position: 1000px 1000px; }
}

/* --- 7. Dienstleistungen Sektion --- */
.services-section {
    position: relative;
}

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

.service-item {
    background: white;
    padding: var(--spacing-lg);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: all var(--transition-speed-normal) var(--ease-in-out);
    position: relative;
    z-index: 1;
    border: 1px solid var(--border-color);
}

.service-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    opacity: 0;
    z-index: -1;
    transition: opacity 0.3s var(--ease-in-out);
}

.service-item:hover::before {
    opacity: 0.05;
}

.service-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    transition: all 0.3s var(--ease-in-out);
}

.service-item:hover i {
    transform: translateY(-5px);
    color: var(--accent-color);
}

.service-item h3 {
    margin-bottom: var(--spacing-xs);
}

.service-item p {
    margin-bottom: var(--spacing-md);
    font-size: 0.95rem;
}

/* --- 8. Portfolio Sektion --- */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.portfolio-item {
    background-color: var(--bg-light);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-speed-normal) var(--ease-in-out);
    position: relative;
}

.portfolio-item img {
    width: 100%;
    height: 280px;
    object-fit: cover;
    transition: transform var(--transition-speed-slow) var(--ease-in-out);
}

.portfolio-item:hover img {
    transform: scale(1.05);
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(30, 41, 59, 0.85);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity var(--transition-speed-normal) var(--ease-in-out);
    padding: var(--spacing-md);
    text-align: center;
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-overlay h3 {
    color: var(--text-light);
    margin-bottom: var(--spacing-sm);
    transform: translateY(20px);
    transition: transform var(--transition-speed-normal) var(--ease-in-out) 0.1s;
}

.portfolio-overlay p {
    color: rgba(255, 255, 255, 0.85);
    transform: translateY(20px);
    transition: transform var(--transition-speed-normal) var(--ease-in-out) 0.2s;
}

.portfolio-item:hover .portfolio-overlay h3,
.portfolio-item:hover .portfolio-overlay p {
    transform: translateY(0);
}

/* --- 9. Tech-Stack Sektion --- */
.tech-stack {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
    margin: var(--spacing-lg) auto;
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.tech-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: white;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-speed-normal) var(--ease-in-out);
}

.tech-icon img {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.tech-item:hover .tech-icon {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

/* --- 10. Prozess-Sektion --- */
.process-steps {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.process-step {
    flex: 1;
    min-width: 250px;
    max-width: 300px;
    position: relative;
    padding: var(--spacing-md);
    background-color: white;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-speed-normal) var(--ease-in-out);
}

.process-step:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.process-step-number {
    position: absolute;
    top: -20px;
    left: 20px;
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-family: var(--font-heading);
}

/* --- 11. Statistiken --- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
    font-family: var(--font-heading);
}

.stat-label {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* --- 12. Testimonials --- */
.testimonials {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
}

.testimonial-card {
    flex: 1;
    min-width: 300px;
    max-width: 400px;
    background-color: white;
    padding: var(--spacing-md);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    position: relative;
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: 20px;
    left: 20px;
    font-size: 4rem;
    font-family: serif;
    color: var(--primary-color);
    opacity: 0.1;
    line-height: 1;
}

.testimonial-content {
    margin-bottom: var(--spacing-md);
    font-style: italic;
    position: relative;
    z-index: 1;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.testimonial-author img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
}

.testimonial-author-info h4 {
    margin-bottom: 4px;
}

.testimonial-author-info p {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* --- 13. CTA Sektion --- */
.cta-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    text-align: center;
    padding: var(--section-padding) 0;
    position: relative;
    overflow: hidden;
}

.cta-section h2 {
    color: white;
    margin-bottom: var(--spacing-md);
}

.cta-section p {
    max-width: 700px;
    margin: 0 auto var(--spacing-lg) auto;
    color: rgba(255, 255, 255, 0.9);
}

/* --- 14. Kontaktformular --- */
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 16px 20px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background-color: white;
  font-family: var(--font-body);
  transition: all 0.3s ease;
}

.contact-form label {
  position: absolute;
  top: 16px;
  left: 20px;
  color: var(--text-dark);
  transition: all 0.3s ease;
  pointer-events: none;
}

/* Floating Label-Effekt */
input:focus + label,
textarea:focus + label,
input:not(:placeholder-shown) + label,
textarea:not(:placeholder-shown) + label {
  transform: translateY(-30px) scale(0.9);
  color: var(--primary-color);
}

/* --- 15. Footer --- */
.main-footer {
    background-color: var(--bg-dark);
    color: var(--text-light);
    padding: var(--section-padding) 0 var(--spacing-md) 0;
    font-size: 0.95rem;
    border-top: 5px solid var(--primary-color);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-col h3 {
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
    font-size: 1.2rem;
}

.footer-col ul {
    margin-top: var(--spacing-sm);
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col a {
    color: var(--text-light);
    opacity: 0.85;
    transition: all var(--transition-speed-normal) ease;
}

.footer-col a:hover {
    color: var(--secondary-color);
    opacity: 1;
    transform: translateX(3px);
}

.social-icons {
    display: flex;
    gap: var(--spacing-sm);
}

.social-icons a {
    display: inline-block;
    opacity: 1;
}

.social-icons img {
    height: 32px;
    width: 32px;
    filter: brightness(0) invert(1);
    transition: all var(--transition-speed-normal) ease;
}

.social-icons img:hover {
    transform: scale(1.15) rotate(5deg);
    filter: brightness(0) invert(1) drop-shadow(0 0 5px var(--secondary-color));
}

.copyright {
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    padding-top: var(--spacing-md);
    opacity: 0.7;
    font-size: 0.9rem;
}

/* --- 16. Scroll-Animationen --- */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s var(--ease-in-out), transform 0.8s var(--ease-in-out);
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- 17. Responsive Anpassungen --- */
@media (max-width: 992px) {
    h1 {
        font-size: 2.8rem;
    }
    h2 {
        font-size: 2.2rem;
    }
    .hero-section {
        min-height: 65vh;
    }
    .section-padding {
        padding: 80px 0;
    }
}

@media (max-width: 768px) {
    .header-content {
        justify-content: space-between;
    }
    .main-nav {
        display: none;
        flex-direction: column;
        width: 100%;
        background-color: rgba(255, 255, 255, 0.98);
        position: absolute;
        top: 100%;
        left: 0;
        box-shadow: var(--shadow-md);
        padding: var(--spacing-sm) 0;
        z-index: 900;
    }
    .main-nav.active {
        display: flex;
    }
    .main-nav ul {
        flex-direction: column;
        gap: 0;
        width: 100%;
    }
    .main-nav ul li {
        width: 100%;
        text-align: center;
        border-bottom: 1px solid var(--border-color);
    }
    .main-nav ul li:last-child {
        border-bottom: none;
    }
    .main-nav a {
        display: block;
        padding: var(--spacing-sm) 0;
        font-size: 1.1rem;
    }
    .main-nav a::after {
        display: none;
    }
    .menu-toggle {
        display: block;
    }
    .language-switcher {
        order: 3;
        margin-left: var(--spacing-sm);
    }
    h1 {
        font-size: 2.4rem;
    }
    h2 {
        font-size: 2rem;
    }
    .hero-section {
        min-height: 50vh;
        padding: var(--section-padding) 0;
    }
    .hero-section h1, .hero-section p, .hero-section .btn {
        animation: none;
        opacity: 1;
        transform: none;
    }
    .services-grid, .portfolio-grid, .footer-content {
        grid-template-columns: 1fr;
    }
    .process-steps {
        flex-direction: column;
        align-items: center;
    }
    .process-step {
        max-width: 100%;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-col {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: 1.5rem;
    }
    h1 {
        font-size: 2rem;
    }
    h2 {
        font-size: 1.7rem;
    }
    .btn {
        padding: 10px 20px;
    }
    .lang-button {
        padding: 6px 12px;
    }
    .stats-grid {
        grid-template-columns: 1fr;
    }
    .tech-stack {
        gap: var(--spacing-sm);
    }
    .tech-icon {
        width: 50px;
        height: 50px;
    }
    .tech-icon img {
        width: 30px;
        height: 30px;
    }
}
/* --- Projects Page Styles --- */
.hero-projects {
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.9) 0%, rgba(15, 23, 42, 0.95) 100%), 
                url('img/projects-hero-bg.jpg') no-repeat center center/cover;
    min-height: 60vh;
}

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

.filter-btn {
    padding: 10px 20px;
    border: none;
    background-color: var(--bg-light);
    color: var(--text-dark);
    border-radius: 50px;
    cursor: pointer;
    font-family: var(--font-heading);
    font-weight: 600;
    transition: all var(--transition-speed-normal) var(--ease-in-out);
}

.filter-btn:hover, .filter-btn.active {
    background-color: var(--primary-color);
    color: var(--text-light);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.project-card {
    background-color: var(--bg-light);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-speed-normal) var(--ease-in-out);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.project-image {
    position: relative;
    height: 250px;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-speed-slow) var(--ease-in-out);
}

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

.project-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background-color: var(--accent-color);
    color: var(--text-light);
    padding: 5px 15px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
}

.project-content {
    padding: var(--spacing-md);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.project-content h3 {
    margin-bottom: var(--spacing-xs);
}

.project-content p {
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: var(--spacing-md);
}

.project-tech span {
    background-color: var(--bg-gray);
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 0.8rem;
    color: var(--primary-color);
}

/* Responsive Anpassungen für Projects Page */
@media (max-width: 768px) {
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .project-image {
        height: 200px;
    }
}

@media (max-width: 480px) {
    .filter-btn {
        padding: 8px 15px;
        font-size: 0.9rem;
    }
    
    .hero-projects {
        min-height: 50vh;
    }
}