/* --- Global Reset & Variablen --- */
:root {
    --bg-dark: #08090c;
    --bg-card: rgba(22, 24, 33, 0.7);
    --bg-card-hover: rgba(28, 31, 43, 0.9);
    --border-color: rgba(255, 255, 255, 0.08);
    
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    
    --purple: #a855f7;
    --cyan: #06b6d4;
    --gray-dark: #1f2937;
    
    --glow-purple: rgba(168, 85, 247, 0.4);
    --glow-cyan: rgba(6, 182, 212, 0.4);
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    overflow-x: hidden;
    line-height: 1.6;
}

/* Custom Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: var(--gray-dark); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--purple); }

/* --- Hilfsklassen --- */
.text-gradient {
    background: linear-gradient(135deg, var(--cyan), var(--purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* --- Header & Navigation --- */
.main-header {
    position: fixed;
    top: 0; left: 0; width: 100%;
    z-index: 1000;
    background: rgba(8, 9, 12, 0.7);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo {
    height: 60px;
    width: auto;
    filter: invert(1) brightness(1.2); /* Invertiert dein schwarzes Logo zu Weiß */
}

.brand-name {
    font-weight: 800;
    letter-spacing: 1px;
    font-size: 1.2rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 25px;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.3s;
}

.nav-links a:hover { color: var(--text-main); }

.btn-sm {
    background: rgba(255, 255, 255, 0.05);
    padding: 8px 16px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

/* --- Hero Sektion --- */
.hero-section {
    min-height: 85vh; /* Etwas mehr Höhe für besseres Spacing */
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 160px 20px 80px 20px;
    background: radial-gradient(circle at 50% 35%, rgba(168, 85, 247, 0.12), transparent 55%);
}

.hero-content { 
    max-width: 850px; 
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-title { 
    font-size: 3.8rem; 
    font-weight: 800; 
    line-height: 1.15; 
    margin-bottom: 25px; 
    letter-spacing: -1px;
}

.hero-subtitle { 
    color: var(--text-main); 
    font-size: 1.25rem; 
    margin-bottom: 15px; 
    font-weight: 400; 
    line-height: 1.7;
    max-width: 750px;
}

.hero-tagline {
    color: var(--text-muted);
    font-size: 1.05rem;
    font-weight: 300;
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    align-items: center;
    gap: 20px;
}

.hero-contact-btn {
    padding: 14px 28px !important;
    border-radius: 30px !important;
    text-decoration: none;
    font-weight: 600;
    color: var(--text-main) !important;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.03);
}

.hero-contact-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--cyan);
    box-shadow: 0 0 15px var(--glow-cyan);
}

.cta-button {
    background: linear-gradient(135deg, var(--purple), var(--cyan));
    color: #fff;
    padding: 14px 32px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    box-shadow: 0 4px 20px var(--glow-purple);
    transition: transform 0.3s, box-shadow 0.3s;
    display: inline-block;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px var(--glow-cyan);
}

/* --- Timeline Sektion --- */
.timeline-section { max-width: 1100px; margin: 0 auto; padding: 100px 20px; }
.section-header { text-align: center; margin-bottom: 80px; }
.section-header h2 { font-size: 2.5rem; margin-bottom: 100px; }
.section-header p { color: var(--text-muted); }

/* Das eigentliche Timeline-Gerüst */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

/* Die vertikale Center-Linie */
.timeline::after {
    content: '';
    position: absolute;
    width: 2px;
    background: linear-gradient(to bottom, var(--cyan), var(--purple), transparent);
    top: 0; bottom: 0; left: 50%;
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    width: 50%;
    padding: 20px 40px;
    opacity: 0; /* Für die JS-Animation */
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.25, 1, 0.5, 1);
}

.timeline-item.left { left: 0; text-align: right; }
.timeline-item.right { left: 50%; text-align: left; }

/* Timeline Punkte auf der Linie */
.timeline-dot {
    position: absolute;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--bg-dark);
    border: 3px solid var(--cyan);
    top: 45px;
    z-index: 10;
    transition: background 0.3s, transform 0.3s;
}

.timeline-item.left .timeline-dot { right: -8px; }
.timeline-item.right .timeline-dot { left: -8px; border-color: var(--purple); }

/* Cards Design */
.content-card {
    background: var(--bg-card);
    padding: 30px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    position: relative;
    transition: all 0.4s ease;
    backdrop-filter: blur(6px);
}

.timeline-item.left .content-card { border-right: 3px solid var(--cyan); }
.timeline-item.right .content-card { border-left: 3px solid var(--purple); }

/* Hover Effekte */
.timeline-item:hover .content-card {
    transform: translateY(-5px);
    background: var(--bg-card-hover);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.timeline-item.left:hover .timeline-dot { background: var(--cyan); transform: scale(1.3); }
.timeline-item.right:hover .timeline-dot { background: var(--purple); transform: scale(1.3); }

/* Card Internals */
.year-badge {
    font-size: 0.85rem;
    font-weight: 800;
    color: var(--cyan);
    letter-spacing: 1px;
    display: inline-block;
    margin-bottom: 10px;
}
.timeline-item.right .year-badge { color: var(--purple); }

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.timeline-item.left .card-header { flex-direction: row-reverse; }

.status-badge {
    font-size: 0.75rem;
    padding: 4px 10px;
    border-radius: 12px;
    font-weight: 600;
}
.status-badge.active { background: rgba(6, 182, 212, 0.15); color: var(--cyan); }
.status-badge.archived { background: var(--gray-dark); color: var(--text-muted); }

.project-desc { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 20px; font-weight: 300; }

.tech-stack {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}
.timeline-item.left .tech-stack { justify-content: flex-end; }

.tech-stack span {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.8rem;
    color: var(--text-main);
}

.project-link {
    color: var(--text-main);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    transition: opacity 0.3s;
}
.project-link:hover { opacity: 0.7; }

/* JS Trigger Klasse */
.timeline-item.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Footer --- */
footer {
    text-align: center;
    padding: 40px 20px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* --- Responsive Media Queries (Mobile First für die Timeline) --- */
@media screen and (max-width: 768px) {
    .hero-title { font-size: 2.5rem; }
    .hero-subtitle { font-size: 1.1rem; }
    .hero-buttons { flex-direction: column; width: 100%; gap: 15px; }
    .cta-button, .hero-contact-btn { width: 100%; text-align: center; }
    
    .timeline::after { left: 20px; } /* Linie nach ganz links verschieben */
    
    .timeline-item {
        width: 100%;
        padding-left: 55px;
        padding-right: 0;
        text-align: left !important;
    }
    
    .timeline-item.right { left: 0; }
    
    .timeline-dot { left: 12px !important; top: 45px; }
    
    .timeline-item.left .content-card { border-right: none; border-left: 3px solid var(--cyan); }
    .timeline-item.left .card-header, .timeline-item.left .tech-stack { flex-direction: row; justify-content: flex-start; }
    
    .header-container { flex-direction: column; gap: 15px; }
}