/* ============================================
   GLOBAL STYLES & RESET
   ============================================ */

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

*:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 4px;
}

::selection {
    background-color: rgba(143, 94, 255, 0.35);
    color: var(--color-text-primary);
}

:root {
    /* Modern Space Theme Palette */
    --color-background: #000000;
    --color-background-alt: #030305;
    --color-surface: rgba(10, 10, 12, 0.7);
    --color-surface-hover: rgba(20, 20, 25, 0.8);
    --color-primary: #ffffff;
    --color-secondary: #a1a1aa;
    --color-accent: #8f5eff;
    --color-accent-secondary: #3b82f6;
    --color-accent-glow: rgba(143, 94, 255, 0.5);
    
    --color-text-primary: #ffffff;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;
    
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-hover: rgba(255, 255, 255, 0.15);
    
    --gradient-primary: linear-gradient(135deg, #8f5eff 0%, #3b82f6 100%);
    --gradient-text: linear-gradient(135deg, #ffffff 0%, #cbd5e1 100%);
    --gradient-surface: linear-gradient(180deg, rgba(255, 255, 255, 0.03) 0%, rgba(255, 255, 255, 0.0) 100%);
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
    --font-heading: 'Space Grotesk', sans-serif;
    
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 20px rgba(143, 94, 255, 0.15);
    
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 24px;
    --radius-full: 9999px;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    color: var(--color-text-primary);
    background-color: var(--color-background);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* ============================================
   SPACE BACKGROUND & ATMOSPHERE
   ============================================ */

/* Stars Background */
.space-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
    background: radial-gradient(circle at 50% 0%, #1a1a2e 0%, #000000 100%);
}

.stars-small, .stars-medium, .stars-large {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: transparent;
}

.stars-small {
    background-image: 
        radial-gradient(1px 1px at 10% 10%, white, transparent),
        radial-gradient(1px 1px at 20% 20%, white, transparent),
        radial-gradient(1px 1px at 30% 30%, white, transparent),
        radial-gradient(1px 1px at 40% 40%, white, transparent),
        radial-gradient(1px 1px at 50% 50%, white, transparent),
        radial-gradient(1px 1px at 60% 60%, white, transparent),
        radial-gradient(1px 1px at 70% 70%, white, transparent),
        radial-gradient(1px 1px at 80% 80%, white, transparent),
        radial-gradient(1px 1px at 90% 90%, white, transparent);
    background-size: 550px 550px;
    opacity: 0.6;
    animation: starTwinkle 4s infinite alternate;
}

.stars-medium {
    background-image: 
        radial-gradient(2px 2px at 15% 15%, white, transparent),
        radial-gradient(2px 2px at 35% 35%, white, transparent),
        radial-gradient(2px 2px at 55% 55%, white, transparent),
        radial-gradient(2px 2px at 75% 75%, white, transparent),
        radial-gradient(2px 2px at 95% 95%, white, transparent);
    background-size: 350px 350px;
    opacity: 0.4;
}

/* Subtle Planet/Glow elements */
.planet-glow-1 {
    position: fixed;
    top: -10%;
    right: -5%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(143, 94, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(60px);
    z-index: -1;
}

.planet-glow-2 {
    position: fixed;
    bottom: -10%;
    left: -10%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(80px);
    z-index: -1;
}

@keyframes starTwinkle {
    0% { opacity: 0.4; }
    100% { opacity: 0.8; }
}

/* ============================================
   TYPOGRAPHY & UTILITIES
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--color-text-primary);
    line-height: 1.2;
    font-weight: 600;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition-base);
    font-size: 0.95rem;
    cursor: pointer;
}

.btn-primary {
    background: var(--color-primary);
    color: #000;
    border: 1px solid var(--color-primary);
}

.btn-primary:hover {
    background: transparent;
    color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.3);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-text-primary);
    transform: translateY(-2px);
}

/* ============================================
   NAVIGATION
   ============================================ */

.navigation-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 80px;
    display: flex;
    align-items: center;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition-base);
}

.nav-container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-text-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: var(--transition-base);
    transform: translateX(-50%);
}

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

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    position: relative;
}

.hero-container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.profile-image-wrapper {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    padding: 3px;
    background: var(--gradient-primary);
    margin-bottom: 2rem;
    position: relative;
}

.profile-image-wrapper::before {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    background: var(--gradient-primary);
    filter: blur(10px);
    opacity: 0.5;
    z-index: -1;
}

.profile-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    border: 3px solid var(--color-background);
}

.hero-title {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 0.5rem;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 30px rgba(255, 255, 255, 0.1);
}

.hero-subtitle {
    font-size: clamp(1.1rem, 3vw, 1.5rem);
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
    font-weight: 300;
}

.social-links {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.social-links a {
    color: var(--color-text-secondary);
    transition: var(--transition-fast);
    font-size: 1.5rem;
}

.social-links a:hover {
    color: var(--color-text-primary);
    transform: translateY(-3px);
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    opacity: 0.7;
    animation: float 3s ease-in-out infinite;
}

.scroll-indicator span {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-text-primary), transparent);
}

@keyframes float {
    0%, 100% { transform: translate(-50%, 0); }
    50% { transform: translate(-50%, 10px); }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   SECTIONS COMMON
   ============================================ */

section {
    padding: var(--spacing-xl) 0;
    position: relative;
    z-index: 1;
}

.section-container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 4rem;
    text-align: center;
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* ============================================
   ABOUT SECTION
   ============================================ */

.about-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.about-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    text-align: center;
    transition: var(--transition-base);
    backdrop-filter: blur(10px);
}

.about-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-border-hover);
    background: var(--color-surface-hover);
    box-shadow: var(--shadow-glow);
}

.about-icon {
    font-size: 2.5rem;
    color: var(--color-accent);
    margin-bottom: 1.5rem;
    display: inline-flex;
    padding: 1rem;
    background: rgba(143, 94, 255, 0.1);
    border-radius: 50%;
}

.about-card h3 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.about-card p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ============================================
   PROJECTS SECTION
   ============================================ */

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
}

.project-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition-base);
    group: project-card;
}

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

.project-image-wrapper {
    width: 100%;
    aspect-ratio: 16/9;
    position: relative;
    overflow: hidden;
}

.project-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

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

.neubau-gradient {
    background: linear-gradient(45deg, #1a1a1a, #333333);
    display: flex;
    align-items: center;
    justify-content: center;
}

.neubau-logo-wrapper {
    text-align: center;
    color: white;
}

.neubau-logo {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2rem;
    font-weight: bold;
    letter-spacing: -1px;
}

.project-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-fast);
    backdrop-filter: blur(2px);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-view-btn {
    padding: 0.75rem 1.5rem;
    background: white;
    color: black;
    border: none;
    border-radius: var(--radius-full);
    font-weight: 600;
    cursor: pointer;
    transform: translateY(20px);
    transition: var(--transition-base);
}

.project-card:hover .project-view-btn {
    transform: translateY(0);
}

.project-content {
    padding: 2rem;
}

.project-title {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.project-description {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tag {
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    color: var(--color-text-secondary);
}

.project-external-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-accent);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
}

.project-external-link:hover {
    text-decoration: underline;
}

/* ============================================
   CERTIFICATES SECTION
   ============================================ */

.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.certificate-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    transition: var(--transition-base);
}

.certificate-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--color-text-primary);
}

.certificate-icon {
    font-size: 1.5rem;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
}

.certificate-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.certificate-card p {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin-bottom: 1rem;
}

.certificate-link {
    margin-top: auto;
    font-size: 0.85rem;
    color: var(--color-accent);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* ============================================
   CONTACT SECTION
   ============================================ */

.contact-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
    background: var(--color-surface);
    padding: 3rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.contact-text {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
}

.contact-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    padding: 3rem 0;
    text-align: center;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* ============================================
   MODAL
   ============================================ */

.modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: #0f0f11;
    width: 100%;
    max-width: 900px;
    max-height: 90vh;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    position: relative;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    transform: scale(0.95);
    transition: var(--transition-base);
}

.modal.active .modal-content {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.modal-body {
    overflow-y: auto;
    padding: 2rem;
}

.modal-body img {
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
}

.modal-description h2 {
    margin-bottom: 0.5rem;
}

.modal-description h3 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-size: 1.1rem;
    color: var(--color-text-primary);
}

.modal-description p, .modal-description li {
    color: var(--color-text-secondary);
    margin-bottom: 0.5rem;
}

.modal-description ul {
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}

/* ============================================
   MOBILE RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
        z-index: 1001;
    }
    
    .mobile-menu-toggle span {
        display: block;
        width: 24px;
        height: 2px;
        background: white;
        margin: 5px 0;
        transition: var(--transition-base);
    }

    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        width: 80%;
        background: #050505;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2rem;
        transform: translateX(100%);
        transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        border-left: 1px solid var(--color-border);
        backdrop-filter: blur(20px);
    }

    .nav-links.active {
        transform: translateX(0);
        box-shadow: -10px 0 30px rgba(0,0,0,0.5);
    }

    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
    }
    
    .contact-buttons {
        flex-direction: column;
    }
}