:root {
    --primary-color: #00ff9c;
    --secondary-color: #ff3864;
    --background: #0d1117;
    --background-light: #161b22;
    --text-primary: #e6e6e6;
    --text-secondary: #8b949e;
    --terminal-font: 'JetBrains Mono', 'Fira Code', monospace;
    --transition: all 0.25s cubic-bezier(0.645, 0.045, 0.355, 1);
    --border-radius: 4px;
}

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

body {
    background-color: var(--background);
    color: var(--text-primary);
    font-family: var(--terminal-font);
    line-height: 1.6;
    font-size: 16px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Navigation */
.navbar {
    background-color: var(--background);
    border-bottom: 1px solid var(--primary-color);
    position: fixed;
    width: 100%;
    z-index: 1000;
    padding: 1rem 0;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
}

.nav-links a:hover {
    color: var(--primary-color);
    background-color: rgba(0, 255, 156, 0.1);
}

.nav-links a::before {
    content: '$ ';
    color: var(--primary-color);
    opacity: 0;
    transition: var(--transition);
}

.nav-links a:hover::before {
    opacity: 1;
}

/* Section Headers */
section {
    padding: 5rem 0;
}

section h2 {
    font-size: 2rem;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

section h2::before {
    content: '#!/ ';
    color: var(--primary-color);
}

/* Cards */
.card {
    background-color: var(--background-light);
    border: 1px solid var(--primary-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 8px rgba(0, 255, 156, 0.2);
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.skill-category {
    background-color: var(--background-light);
    border: 1px solid rgba(0, 255, 156, 0.2);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    transition: var(--transition);
}

.skill-category:hover {
    border-color: var(--primary-color);
}

.skill-category h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.skill-category ul {
    list-style: none;
}

.skill-category li {
    color: var(--text-secondary);
    margin: 0.5rem 0;
    padding-left: 1rem;
    position: relative;
}

.skill-category li::before {
    content: '>';
    color: var(--primary-color);
    position: absolute;
    left: 0;
}

/* Certifications Section */
.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.certification-card {
    background-color: var(--background-light);
    border: 1px solid rgba(0, 255, 156, 0.2);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    transition: var(--transition);
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.certification-card:hover {
    border-color: var(--primary-color);
}

.certification-logo {
    color: var(--primary-color);
    font-size: 2rem;
}

.certification-content h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.certification-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Terminal Window */
.terminal-window {
    background-color: var(--background);
    border: 1px solid var(--primary-color);
    border-radius: var(--border-radius);
    width: 100%;
    max-width: 800px;
    margin: 2rem auto;
    overflow: hidden;
}

.terminal-header {
    background-color: var(--background-light);
    padding: 0.5rem 1rem;
    border-bottom: 1px solid var(--primary-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.terminal-title {
    color: var(--primary-color);
}

.terminal-content {
    padding: 1rem;
    max-height: 400px;
    overflow-y: auto;
}

.terminal-line {
    margin: 0.5rem 0;
    display: flex;
}

.terminal-prompt {
    color: var(--primary-color);
    margin-right: 0.5rem;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--background);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: var(--border-radius);
}

/* Footer */
footer {
    background-color: var(--background-light);
    padding: 2rem 0;
    border-top: 1px solid var(--primary-color);
    margin-top: 4rem;
}

footer a {
    color: var(--primary-color);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        font-size: 14px;
    }

    .container {
        padding: 0 1rem;
    }

    section {
        padding: 3rem 0;
    }

    .nav-links {
        gap: 1rem;
    }
}

/* Global Styles */
body {
    background-color: var(--background);
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(0, 255, 156, 0.08) 0%, transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(255, 60, 100, 0.08) 0%, transparent 25%);
    color: var(--text-primary);
    font-family: var(--terminal-font);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navigation */
nav {
    background: var(--background-light);
    backdrop-filter: blur(8px);
    border-bottom: var(--glass-border);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 1.5rem;
    font-family: var(--terminal-font);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo a::before {
    content: ">";
    color: var(--primary-color);
}

.logo a::after {
    content: "_";
    animation: blink 1s infinite;
}

.nav-links {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    align-items: center;
    gap: 2rem;
}

.nav-links li a {
    position: relative;
    color: var(--text-secondary);
    transition: var(--transition);
}

.nav-links li a::before {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: var(--primary-color);
    transition: var(--transition);
}

.nav-links li a:hover {
    color: var(--primary-color);
}

.nav-links li a:hover::before {
    width: 100%;
}

/* Hamburger Menu */
.hamburger {
    display: none;
    cursor: pointer;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px 0;
    background-color: var(--primary-color);
    transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -5px);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: fixed;
        top: 60px;
        left: 0;
        width: 100%;
        height: auto;
        background-color: var(--background);
        border-bottom: 1px solid var(--primary-color);
        padding: 1rem;
        flex-direction: column;
        gap: 1rem;
    }

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

    .hamburger {
        display: block;
    }

    .nav-links li {
        width: 100%;
    }

    .nav-links a {
        display: block;
        width: 100%;
        padding: 0.8rem 1rem;
    }

    .nav-links a:hover {
        background-color: var(--background-light);
    }
}

/* Terminal Button Styles */
.terminal-item {
    position: relative;
}

.terminal-btn {
    background: var(--background-light);
    backdrop-filter: blur(16px);
    border: var(--glass-border);
    border-radius: 8px;
    color: var(--primary-color);
    padding: 8px 16px;
    cursor: pointer;
    font-family: var(--terminal-font);
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.terminal-btn:hover {
    background-color: var(--primary-color);
    color: var(--background-dark);
}

.terminal-btn i {
    font-size: 14px;
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: left;
    padding: 0 2rem;
}

.hero-content {
    width: 100%;
    max-width: 800px;
    opacity: 0;
    animation: fadeIn 1s forwards;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
    white-space: pre;
    border-right: 2px solid var(--primary-color);
    overflow: hidden;
    animation: typing 3.5s steps(40, end), blink-caret 0.75s step-end infinite;
}

.hero-content h2 {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    opacity: 0;
    animation: fadeIn 1s forwards 1s;
}

.typing-effect {
    font-size: 1.2rem;
    color: var(--text-primary);
    opacity: 0;
    animation: fadeIn 1s forwards 2s;
}

.typing-effect::before {
    content: ">";
    margin-right: 0.5rem;
}

/* Sections */
section {
    padding: 6rem 0;
    opacity: 0;
    animation: fadeIn 1s forwards;
}

section h2 {
    font-size: 2rem;
    margin-bottom: 3rem;
    text-align: left;
    color: var(--text-primary);
    position: relative;
    display: inline-block;
}

section h2::before {
    content: '>';
    color: var(--primary-color);
    margin-right: 1rem;
    opacity: 0.7;
}

section h2::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -10px;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), transparent);
}

/* About Section */
.about-content {
    display: flex;
    justify-content: flex-start;
    gap: 4rem;
    margin-top: 2rem;
}

.about-text {
    max-width: 600px;
    color: var(--text-secondary);
}

.about-text p {
    margin-bottom: 1.5rem;
}

.about-text p:last-child {
    margin-bottom: 0;
}

.about-text p::before {
    content: ">";
    margin-right: 0.5rem;
    color: var(--primary-color);
}

/* Projects Section */

/* Certifications Section */
.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.certification-card {
    background: var(--background-light);
    backdrop-filter: blur(8px);
    border-radius: 12px;
    border: var(--glass-border);
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    padding: 2rem;
}

.certification-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 12px 40px rgba(100, 255, 218, 0.1);
}

.certification-logo {
    font-size: 2.5rem;
    color: var(--primary-color);
    min-width: 60px;
    text-align: center;
}

.certification-content {
    flex: 1;
}

.certification-content h3 {
    color: var(--text-primary);
    font-size: 1.3rem;
    margin-bottom: 1rem;
    font-family: var(--terminal-font);
}

.certification-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.certification-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--terminal-font);
    font-size: 0.9rem;
}

.cert-issuer {
    color: var(--primary-color);
    padding: 0.3rem 0.8rem;
    background-color: rgba(100, 255, 218, 0.1);
    border-radius: 4px;
}

.cert-id {
    color: var(--text-secondary);
    font-style: italic;
}

@media (max-width: 768px) {
    .certifications-grid {
        grid-template-columns: 1fr;
    }

    .certification-card {
        padding: 1.5rem;
    }

    .certification-logo {
        font-size: 2rem;
        min-width: 50px;
    }

    .certification-content h3 {
        font-size: 1.2rem;
    }

    .certification-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
}

/* Contact Section */
.contact-content {
    display: flex;
    justify-content: flex-start;
    align-items: flex-start;
    flex-direction: column;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.contact-item::before {
    content: "$";
    color: var(--primary-color);
}

.contact-item a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.contact-item a:hover {
    color: var(--primary-color);
    text-shadow: 0 0 8px var(--primary-color);
}

/* Footer */
footer {
    background-color: var(--background-light);
    padding: 2rem 0;
    text-align: center;
    color: var(--text-secondary);
    border-top: var(--glass-border);
}

/* Responsive Design */
@media (max-width: 1200px) {
    .container {
        padding: 0 4rem;
    }
}

@media (max-width: 992px) {
    .container {
        padding: 0 2rem;
    }

    .skills-grid,
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .hero-content h2 {
        font-size: 1.3rem;
    }
}

@media (max-width: 768px) {
    .skills-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }

    .container {
        padding: 0 1rem;
    }

    section {
        padding: 4rem 0;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-content h2 {
        font-size: 1.1rem;
    }

    .about-content {
        text-align: left;
    }

    .project-card {
        margin: 0 1rem;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 1.8rem;
    }

    .hero-content h2 {
        font-size: 1rem;
    }

    .typing-effect {
        font-size: 0.9rem;
    }

    .skill-card,
    .project-card {
        padding: 1.5rem;
    }

    .contact-item a {
        font-size: 0.9rem;
    }

    .terminal-output {
        font-size: 0.8rem;
    }
}

/* Touch Device Optimizations */
@media (hover: none) {
    .project-card:hover::before {
        transform: scaleX(1);
    }

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

    .skill-card:hover {
        transform: none;
    }
}

/* Animations */
@keyframes typing {
    from { width: 0 }
    to { width: 100% }
}

@keyframes blink-caret {
    from, to { border-color: transparent }
    50% { border-color: var(--primary-color) }
}

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

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

/* Terminal Overlay */
#terminal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

#terminal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.terminal-window {
    width: 80%;
    max-width: 800px;
    background: var(--background-light);
    backdrop-filter: blur(16px);
    border: var(--glass-border);
    border-radius: 5px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    animation: fadeIn 0.3s ease;
}

.terminal-header {
    background-color: var(--background-lighter);
    padding: 0.5rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: var(--glass-border);
}

.terminal-title {
    color: var(--primary-color);
    font-family: var(--terminal-font);
}

.terminal-close {
    color: var(--text-primary);
    cursor: pointer;
    font-size: 1.5rem;
    transition: color 0.3s ease;
}

.terminal-close:hover {
    color: var(--accent-color);
}

.terminal-content {
    padding: 1rem;
    max-height: 60vh;
    overflow-y: auto;
    font-family: var(--terminal-font);
}

.terminal-output {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.terminal-input-line {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.prompt {
    color: var(--primary-color);
}

.terminal-input {
    background: none;
    border: none;
    color: var(--text-primary);
    font-family: var(--terminal-font);
    font-size: 1rem;
    flex: 1;
    outline: none;
}

.terminal-output p {
    margin: 0.25rem 0;
}

.terminal-output .error {
    color: var(--accent-color);
}

.terminal-output .success {
    color: var(--primary-color);
}

.terminal-output .info {
    color: var(--secondary-color);
}

/* Hidden class */
.hidden {
    display: none !important;
}

/* Easter Egg Hints */
.easter-egg-hint {
    font-size: 0.8rem;
    opacity: 0.6;
    margin-top: 0.5rem;
    cursor: help;
}

/* Matrix Effect */
.matrix-effect {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9998;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.matrix-effect.active {
    opacity: 0.1;
}

/* Konami Code Effect */
.konami-active {
    animation: rainbow-text 2s linear infinite;
}

@keyframes rainbow-text {
    0% { color: var(--primary-color); }
    25% { color: var(--secondary-color); }
    50% { color: var(--accent-color); }
    75% { color: #50fa7b; }
    100% { color: var(--primary-color); }
}

/* Hidden Features */
.hidden {
    display: none !important;
}

.glitch-text {
    position: relative;
    animation: glitch 1s linear infinite;
}

@keyframes glitch {
    2%, 64% { transform: translate(2px, 0) skew(0deg); }
    4%, 60% { transform: translate(-2px, 0) skew(0deg); }
    62% { transform: translate(0, 0) skew(5deg); }
}

/* Pulsierender Effekt für den Terminal-Button */
.terminal-btn::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border: 1px solid var(--primary-color);
    border-radius: 4px;
    animation: pulse 2s infinite;
    opacity: 0;
    left: 0;
    top: 0;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 0.5;
    }
    70% {
        transform: scale(1.05);
        opacity: 0;
    }
    100% {
        transform: scale(1);
        opacity: 0;
    }
}

/* CV Download Button */
.cv-download {
    margin: 2rem 0;
}

.cv-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background-color: var(--background-light);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    padding: 12px 24px;
    border-radius: 4px;
    text-decoration: none;
    font-family: var(--terminal-font);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.cv-btn:hover {
    background-color: var(--primary-color);
    color: var(--background-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(100, 255, 218, 0.2);
}

.cv-btn i {
    font-size: 1.2rem;
}

.cv-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(100, 255, 218, 0.1);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.cv-btn:hover::before {
    width: 300px;
    height: 300px;
}

/* Legal Pages (Impressum & Datenschutz) */
.legal-content {
    max-width: 800px;
    margin: 120px auto 60px;
    padding: 0 20px;
    color: var(--text-primary);
}

.legal-content h1 {
    color: var(--primary-color);
    margin-bottom: 2rem;
    font-size: 2.5rem;
}

.legal-content h2 {
    color: var(--text-primary);
    margin: 2rem 0 1rem;
    font-size: 1.8rem;
}

.legal-content h3 {
    color: var(--text-secondary);
    margin: 1.5rem 0 1rem;
    font-size: 1.4rem;
}

.legal-content h4 {
    color: var(--text-secondary);
    margin: 1rem 0;
    font-size: 1.2rem;
}

.legal-content p {
    margin: 1rem 0;
    line-height: 1.6;
}

.legal-content ul {
    margin: 1rem 0;
    padding-left: 2rem;
}

.legal-content li {
    margin: 0.5rem 0;
    line-height: 1.6;
}

/* Footer Links */
.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

@media (max-width: 768px) {
    .legal-content {
        margin: 100px auto 40px;
        padding: 0 15px;
    }

    .legal-content h1 {
        font-size: 2rem;
    }

    .legal-content h2 {
        font-size: 1.6rem;
    }

    .legal-content h3 {
        font-size: 1.3rem;
    }

    .legal-content h4 {
        font-size: 1.1rem;
    }
}

/* Certifications Section */
.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.certification-card {
    background: var(--background-light);
    backdrop-filter: blur(8px);
    border-radius: 12px;
    border: var(--glass-border);
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    padding: 2rem;
}

.certification-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 12px 40px rgba(100, 255, 218, 0.1);
}

.certification-logo {
    font-size: 2.5rem;
    color: var(--primary-color);
    min-width: 60px;
    text-align: center;
}

.certification-content {
    flex: 1;
}

.certification-content h3 {
    color: var(--text-primary);
    font-size: 1.3rem;
    margin-bottom: 1rem;
    font-family: var(--terminal-font);
}

.certification-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.certification-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--terminal-font);
    font-size: 0.9rem;
}

.cert-issuer {
    color: var(--primary-color);
    padding: 0.3rem 0.8rem;
    background-color: rgba(100, 255, 218, 0.1);
    border-radius: 4px;
}

.cert-id {
    color: var(--text-secondary);
    font-style: italic;
}

@media (max-width: 768px) {
    .certifications-grid {
        grid-template-columns: 1fr;
    }

    .certification-card {
        padding: 1.5rem;
    }

    .certification-logo {
        font-size: 2rem;
        min-width: 50px;
    }

    .certification-content h3 {
        font-size: 1.2rem;
    }

    .certification-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
}