webpage/html/style.css

/* ==========================================
   1. RESET & BASIS STILE
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    overflow-x: hidden;
}

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

/* ==========================================
   2. HEADER & NAVIGATION
   ========================================== */
header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #667eea;
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: #333;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: #667eea;
}

/* Hamburger Icon (Standard versteckt) */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
    z-index: 1100;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: #667eea;
    border-radius: 3px;
    transition: all 0.3s ease;
}

/* ==========================================
   3. HERO SECTION
   ========================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    padding-top: 80px;
}

.hero-content {
    max-width: 800px;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, #091e7a, #667eea);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.hero p {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* ==========================================
   4. BUTTONS & CTAs
   ========================================== */
.cta-button {
    display: inline-block;
    background: #667eea;
    color: white;
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

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

.demo-button {
    background: #667eea;
    color: white;
    padding: 0.8rem 1.5rem;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 500;
    transition: background 0.3s, transform 0.3s;
}

.demo-button:hover {
    background: #5a6fd8;
    transform: translateY(-2px);
}

/* ==========================================
   5. SECTIONS & CONTENT CARDS
   ========================================== */
section {
    padding: 5rem 0;
    background: white;
}

.section-dark {
    background: #f8f9fa;
}

h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

.about-text {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    font-size: 1.1rem;
    line-height: 1.8;
}

.projects, .tech-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.project-card, .tech-card {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    text-align: center;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.project-card h3, .tech-card h3 {
    color: #667eea;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.project-card p, .tech-card p {
    color: #666;
    line-height: 1.6;
}

/* ==========================================
   6. FOOTER
   ========================================== */
footer {
    background: #333;
    color: white;
    text-align: center;
    padding: 3rem 0;
    position: relative;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s;
}

.footer-links a:hover {
    opacity: 0.7;
}

/* Separator Line zwischen Content und Footer */
footer::before {
    content: '';
    position: absolute;
    top: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 2px;
    background: linear-gradient(90deg, transparent, #667eea, transparent);
    border-radius: 1px;
}

/* ==========================================
   7. MOBILE RESPONSIVENESS (BREAKPOINTS)
   ========================================== */

@media (max-width: 768px) {
    /* Zeige Hamburger-Icon */
    .hamburger {
        display: flex;
    }

    /* Verwandle Nav-Links in Dropdown */
    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(255, 255, 255, 0.98);
        flex-direction: column;
        gap: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease-in-out;
        box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
        backdrop-filter: blur(10px);
    }

    /* Wenn Menü offen ist */
    .nav-links.mobile-open {
        max-height: 500px;
    }

    .nav-links li {
        width: 100%;
        text-align: center;
        border-bottom: 1px solid #eee;
    }

    .nav-links a {
        padding: 1.2rem;
        display: block;
    }

    /* Hamburger Animation zum X */
    .hamburger.active span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    .hamburger.active span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    /* Hero Text für Mobile */
    .hero h1 {
        font-size: 2.2rem;
    }
    .hero p {
        font-size: 1.1rem;
    }
}

/* Tablet Portrait */
@media (min-width: 769px) and (max-width: 1024px) {
    section {
        padding: 4rem 0;
    }
    
    footer {
        padding: 2.5rem 0;
    }
    
    .demo-buttons {
        gap: 0.8rem;
    }
}

/* Desktop */
@media (min-width: 1025px) {
    section {
        padding: 5rem 0;
    }
    
    footer {
        padding: 3rem 0;
    }
}

/* Extra Large Desktop */
@media (min-width: 1400px) {
    .container {
        max-width: 1400px;
    }
}