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

:root {
    /* Color Palette */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-primary: #2c3e50;
    --text-secondary: #5a6c7d;
    --accent: #4a90e2;
    --accent-hover: #357abd;
    --border: #e1e8ed;
    --shadow: rgba(0, 0, 0, 0.08);
    --shadow-hover: rgba(0, 0, 0, 0.12);
    
    /* Typography - System Font Stack (Inter-ähnlich) */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Transitions */
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   Container
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: sticky;
    top: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    transition: var(--transition);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-sm);
}

.logo {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 400;
    transition: var(--transition);
    position: relative;
    padding: var(--spacing-xs) 0;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--accent);
}

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--accent);
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.hamburger span {
    width: 25px;
    height: 2px;
    background-color: var(--text-primary);
    transition: var(--transition);
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 60px;
        left: -100%;
        flex-direction: column;
        background-color: var(--bg-primary);
        width: 100%;
        padding: var(--spacing-md);
        box-shadow: 0 4px 6px var(--shadow);
        transition: left 0.3s ease;
        gap: var(--spacing-sm);
        align-items: flex-start;
    }
    
    .nav-menu.active {
        left: 0;
    }
}

/* ============================================
   Availability Banner
   ============================================ */
.availability-banner {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
    color: white;
    padding: var(--spacing-sm) var(--spacing-sm);
    position: relative;
    overflow: hidden;
    animation: slideDown 0.6s ease-out;
}

.availability-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    animation: shimmer 3s infinite;
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes shimmer {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

.availability-content {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    text-align: center;
    position: relative;
    z-index: 1;
}

.availability-icon {
    font-size: 1.5rem;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.2);
    }
}

.availability-text {
    font-weight: 600;
    font-size: 1.125rem;
    letter-spacing: 0.5px;
}

.availability-details {
    font-size: 0.9375rem;
    opacity: 0.95;
    font-weight: 400;
}

.availability-link {
    background-color: white;
    color: var(--accent);
    padding: 0.5rem 1.25rem;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9375rem;
    transition: var(--transition);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    white-space: nowrap;
}

.availability-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
    background-color: #f0f0f0;
}

@media (max-width: 768px) {
    .availability-content {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .availability-text {
        font-size: 1rem;
    }
    
    .availability-details {
        font-size: 0.875rem;
    }
    
    .availability-link {
        margin-top: var(--spacing-xs);
    }
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    padding: var(--spacing-xl) var(--spacing-sm);
    text-align: center;
    background: linear-gradient(to bottom, var(--bg-primary), var(--bg-secondary));
}

.hero-content {
    max-width: 700px;
    margin: 0 auto;
}

.profile-image-wrapper {
    margin-bottom: var(--spacing-md);
}

.profile-image {
    width: 144px;
    height: auto;
    border-radius: 16px;
    object-fit: cover;
    object-position: center;
    border: 4px solid var(--bg-primary);
    box-shadow: 0 8px 24px var(--shadow);
    transition: var(--transition);
}

.profile-image:hover {
    transform: scale(1.05);
    box-shadow: 0 12px 32px var(--shadow-hover);
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    font-weight: 400;
}

@media (min-width: 768px) {
    .hero {
        padding: calc(var(--spacing-xl) * 1.5) var(--spacing-sm);
    }
    
    .profile-image {
        width: 176px;
        height: auto;
    }
    
    .hero-title {
        font-size: 3.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
}

/* ============================================
   About Section
   ============================================ */
.about {
    padding: var(--spacing-xl) var(--spacing-sm);
    background-color: var(--bg-primary);
}

.section-title {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    text-align: center;
}

.facts-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    max-width: 600px;
    margin: 0 auto;
}

.fact-item {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-md);
    background-color: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.fact-item:hover {
    box-shadow: 0 4px 12px var(--shadow);
    transform: translateY(-2px);
}

.fact-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.fact-value {
    font-size: 1.125rem;
    color: var(--text-primary);
    font-weight: 500;
}

@media (min-width: 768px) {
    .facts-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ============================================
   Current Focus Section
   ============================================ */
.current-focus {
    padding: var(--spacing-xl) var(--spacing-sm);
    background-color: var(--bg-secondary);
}

.focus-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    max-width: 900px;
    margin: 0 auto;
}

.focus-card {
    background-color: var(--bg-primary);
    padding: var(--spacing-md);
    border-radius: 12px;
    border: 1px solid var(--border);
    box-shadow: 0 2px 8px var(--shadow);
    transition: var(--transition);
}

.focus-card:hover {
    box-shadow: 0 8px 24px var(--shadow-hover);
    transform: translateY(-4px);
}

.card-link-wrapper {
    text-decoration: none;
    color: inherit;
    display: block;
    cursor: pointer;
}

.card-link-wrapper:hover {
    text-decoration: none;
}

.focus-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.focus-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.7;
}

.card-link {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    display: inline-block;
}

.card-link:hover {
    color: var(--accent-hover);
}

@media (min-width: 768px) {
    .focus-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ============================================
   Projects Page
   ============================================ */
.projects-page {
    padding: var(--spacing-xl) var(--spacing-sm);
    background-color: var(--bg-primary);
}

.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    text-align: center;
    color: var(--text-primary);
}

.timeline {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--border);
}

.timeline-item {
    position: relative;
    padding-left: 80px;
    margin-bottom: var(--spacing-xl);
}

.timeline-year {
    position: absolute;
    left: 0;
    top: 0;
    width: 60px;
    height: 60px;
    background-color: var(--accent);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: 0 4px 12px var(--shadow);
    box-sizing: border-box;
    line-height: 1.2;
    text-align: center;
    padding: 4px;
}

.timeline-content {
    background-color: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: 12px;
    border: 1px solid var(--border);
    box-shadow: 0 2px 8px var(--shadow);
}

.timeline-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.role-title {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    margin-bottom: var(--spacing-sm);
    font-style: italic;
}

.project-details {
    margin-top: var(--spacing-md);
}

.project-item {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border);
}

.project-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.project-item h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.project-item p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.7;
}

.project-link {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    border-bottom: 1px solid transparent;
}

.project-link:hover {
    color: var(--accent-hover);
    border-bottom-color: var(--accent-hover);
}

.project-image-wrapper {
    margin: var(--spacing-md) 0;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 12px var(--shadow);
    max-width: 50%;
    margin-left: auto;
    margin-right: auto;
}

.project-image {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition);
}

.project-image:hover {
    transform: scale(1.02);
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.tag {
    background-color: var(--bg-primary);
    color: var(--accent);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8125rem;
    font-weight: 500;
    border: 1px solid var(--accent);
    transition: var(--transition);
}

.tag:hover {
    background-color: var(--accent);
    color: white;
}

@media (max-width: 768px) {
    .projects-page {
        padding: var(--spacing-md) var(--spacing-xs);
    }
    
    .page-title {
        font-size: 1.75rem;
        margin-bottom: var(--spacing-md);
    }
    
    .container {
        padding: 0 var(--spacing-xs);
    }
    
    .timeline::before {
        left: 15px;
    }
    
    .timeline-item {
        padding-left: 50px;
        margin-bottom: var(--spacing-md);
    }
    
    .timeline-year {
        width: 30px;
        height: 30px;
        font-size: 0.65rem;
        padding: 2px;
        left: 0;
    }
    
    .timeline-content {
        padding: var(--spacing-sm);
    }
    
    .timeline-content h3 {
        font-size: 1.25rem;
        margin-bottom: var(--spacing-xs);
    }
    
    .role-title {
        font-size: 0.875rem;
        margin-bottom: var(--spacing-xs);
    }
    
    .project-details {
        margin-top: var(--spacing-sm);
    }
    
    .project-item {
        margin-bottom: var(--spacing-sm);
        padding-bottom: var(--spacing-sm);
    }
    
    .project-item h4 {
        font-size: 1rem;
    }
    
    .project-item p {
        font-size: 0.9375rem;
        line-height: 1.6;
    }
    
    .project-image-wrapper {
        margin: var(--spacing-sm) 0;
        max-width: 100%;
    }
    
    .tag {
        font-size: 0.75rem;
        padding: 0.2rem 0.6rem;
    }
}

/* ============================================
   CV Page
   ============================================ */
.cv-page {
    padding: var(--spacing-xl) var(--spacing-sm);
    background-color: var(--bg-primary);
}

.cv-section {
    margin-bottom: var(--spacing-xl);
}

.cv-section h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--border);
}

.cv-item {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.cv-item:hover {
    box-shadow: 0 4px 12px var(--shadow);
}

.cv-period {
    font-weight: 600;
    color: var(--accent);
    font-size: 0.9375rem;
}

.cv-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.cv-location {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    margin-bottom: var(--spacing-sm);
    font-style: italic;
}

.cv-content ul {
    list-style: none;
    padding-left: 0;
}

.cv-content li {
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
    line-height: 1.7;
}

.cv-content li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
}

.skills-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.skills-category {
    background-color: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: 8px;
    border: 1px solid var(--border);
}

.skills-category h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.skills-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.skill-tag {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    padding: 0.375rem 0.875rem;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.skill-tag:hover {
    background-color: var(--accent);
    color: white;
    border-color: var(--accent);
}

@media (max-width: 768px) {
    .cv-item {
        grid-template-columns: 1fr;
    }
    
    .cv-period {
        margin-bottom: var(--spacing-xs);
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
}

@media (min-width: 768px) {
    .skills-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ============================================
   Contact Page
   ============================================ */
.contact-page {
    padding: var(--spacing-xl) var(--spacing-sm);
    background-color: var(--bg-primary);
}

.contact-content {
    max-width: 800px;
    margin: 0 auto;
}

.contact-intro {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.contact-intro h2 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.contact-intro .lead {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.contact-details {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.contact-item {
    background-color: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: 12px;
    border: 1px solid var(--border);
    box-shadow: 0 2px 8px var(--shadow);
}

.contact-item h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.contact-item p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.7;
}

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

.contact-item a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

.contact-item ul {
    list-style: none;
    padding-left: 0;
}

.contact-item li {
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
    line-height: 1.7;
}

.contact-item li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
}

.contact-cta {
    text-align: center;
    background-color: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: 12px;
    border: 1px solid var(--border);
    box-shadow: 0 2px 8px var(--shadow);
}

.contact-cta p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
}

.btn-large {
    padding: 0.875rem 2rem;
    font-size: 1.125rem;
}

@media (min-width: 768px) {
    .contact-details {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ============================================
   Legal Pages
   ============================================ */
.legal-page {
    padding: var(--spacing-xl) var(--spacing-sm);
    background-color: var(--bg-primary);
}

.legal-content {
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: 12px;
    border: 1px solid var(--border);
}

.legal-content h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.legal-content h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.legal-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background-color: var(--bg-secondary);
    padding: var(--spacing-md) var(--spacing-sm);
    text-align: center;
    border-top: 1px solid var(--border);
    margin-top: var(--spacing-xl);
}

.footer p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-xs);
}

.footer-links {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--accent);
    text-decoration: underline;
}

.footer-separator {
    color: var(--text-secondary);
    opacity: 0.5;
}

/* ============================================
   Cookie Banner
   ============================================ */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border);
    box-shadow: 0 -4px 12px var(--shadow);
    padding: var(--spacing-md);
    z-index: 10000;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.cookie-banner.show {
    transform: translateY(0);
}

.cookie-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    align-items: center;
}

.cookie-content p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-align: center;
    margin: 0;
}

.cookie-buttons {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: center;
}

.btn {
    padding: 0.625rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-family);
}

.btn-primary {
    background-color: var(--accent);
    color: white;
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

@media (min-width: 768px) {
    .cookie-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
    
    .cookie-content p {
        text-align: left;
        flex: 1;
    }
    
    .cookie-buttons {
        flex-wrap: nowrap;
    }
}

/* ============================================
   Scroll Reveal Animation
   ============================================ */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}