/* ============================================
   Leon Fischer Portfolio - Modern Glassmorphism Neon Theme
   ============================================ */

/* CSS Variables */
:root {
    /* Colors - Dark Mode (default) */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);

    /* Neon Colors */
    --neon-purple: #a855f7;
    --neon-purple-glow: rgba(168, 85, 247, 0.5);
    --neon-cyan: #06b6d4;
    --neon-cyan-glow: rgba(6, 182, 212, 0.5);
    --neon-pink: #ec4899;
    --neon-pink-glow: rgba(236, 72, 153, 0.5);
    --neon-blue: #3b82f6;
    --neon-blue-glow: rgba(59, 130, 246, 0.5);

    /* Text */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    /* Success/Error */
    --success: #22c55e;
    --success-glow: rgba(34, 197, 94, 0.4);
    --error: #ef4444;
    --error-glow: rgba(239, 68, 68, 0.4);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

/* App Container */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* Animated Background */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float 20s infinite ease-in-out;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: linear-gradient(135deg, var(--neon-purple), var(--neon-pink));
    top: -200px;
    right: -200px;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue));
    bottom: -150px;
    left: -150px;
    animation-delay: -7s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, var(--neon-pink), var(--neon-purple));
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(50px, -50px) scale(1.1);
    }
    50% {
        transform: translate(-30px, 30px) scale(0.95);
    }
    75% {
        transform: translate(-50px, -20px) scale(1.05);
    }
}

/* Header */
.header {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-md);
    position: relative;
    z-index: 1;
}

.header-name {
    font-size: 3rem;
    font-weight: 900;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 400;
    letter-spacing: 0.5px;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-md);
    position: relative;
    z-index: 1;
}

/* Content Sections */
.content-section {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-2xl) var(--spacing-md);
    position: relative;
}

/* Navigation Section */
.nav-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
    margin: var(--spacing-2xl) 0;
    position: relative;
    z-index: 1;
}

/* Navigation */
.navigation-list {
    display: flex;
    gap: var(--spacing-xl);
    justify-content: center;
    flex-wrap: wrap;
}

.nav-link {
    position: relative;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    padding: var(--spacing-sm) 0;
    transition: all var(--transition-normal);
    letter-spacing: 0.5px;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--neon-cyan);
    transition: width var(--transition-normal);
}

.nav-link:hover {
    color: var(--neon-cyan);
}

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

.nav-link.active {
    color: var(--neon-cyan);
}

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

/* Remove old screen styles - no longer needed for onepager */

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

/* Glass Card */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow:
        0 8px 32px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.glass-card h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    text-align: center;
    background: linear-gradient(135deg, var(--text-primary), var(--neon-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-name {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: var(--spacing-xl);
    text-align: center;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Social Icons */
.social-icons {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
    justify-content: center;
}

.social-icon {
    height: 44px;
    width: 44px;
    color: var(--text-secondary);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    transition: all var(--transition-fast);
    text-decoration: none;
}

.social-icon:hover:not(.coming) {
    color: var(--neon-cyan);
    background: rgba(6, 182, 212, 0.15);
    border: 1px solid var(--neon-cyan);
    transform: translateY(-3px);
    box-shadow: 0 0 15px var(--neon-cyan-glow);
}

.social-icon.coming {
    cursor: not-allowed;
    opacity: 0.6;
}

.social-icon.coming:hover {
    transform: none;
}

.social-icon.coming:hover::after {
    content: 'demnächst';
    position: absolute;
    top: 3.5rem;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 6px;
    font-size: 0.75rem;
    padding: 0.375rem 0.75rem;
    color: var(--neon-purple);
    background: rgba(168, 85, 247, 0.15);
    border: 1px solid rgba(168, 85, 247, 0.3);
    width: max-content;
    transition: all var(--transition-fast);
    font-weight: 500;
}

/* Experience List */
.experience-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.experience-card {
    background: rgba(168, 85, 247, 0.05);
    border: 1px solid rgba(168, 85, 247, 0.2);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.experience-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--neon-purple-glow), transparent);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.experience-card:hover {
    border-color: rgba(168, 85, 247, 0.4);
    box-shadow: 0 8px 30px rgba(168, 85, 247, 0.15);
    transform: translateY(-2px);
}

.experience-card:hover::before {
    opacity: 0.05;
}

/* Timeline */
.timeline {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    position: relative;
    padding: 0.5rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 9px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--neon-cyan), var(--neon-purple));
    z-index: 0;
}


.timeline-item {
    display: flex;
    gap: 1.5rem;
    position: relative;
    z-index: 1;
}

.timeline-marker {
    width: 20px;
    height: 20px;
    min-width: 20px;
    background: var(--bg-primary);
    border: 2px solid var(--neon-cyan);
    border-radius: 50%;
    position: relative;
    top: 4px;
    box-shadow: 0 0 8px rgba(6, 182, 212, 0.4);
}

.timeline-content {
    flex: 1;
    background: rgba(168, 85, 247, 0.05);
    border: 1px solid rgba(168, 85, 247, 0.2);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
}

.timeline-content:hover {
    border-color: rgba(168, 85, 247, 0.4);
    box-shadow: 0 8px 30px rgba(168, 85, 247, 0.15);
}

.exp-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.exp-header h3 {
    font-size: 1.125rem;
    color: var(--text-primary);
    flex: 1;
}

.exp-date {
    color: var(--neon-purple);
    font-weight: 600;
    font-size: 0.875rem;
    white-space: nowrap;
}

.exp-company {
    color: var(--neon-cyan);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    position: relative;
    z-index: 1;
}

.exp-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    position: relative;
    z-index: 1;
}

/* Skills Grid */
.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    position: relative;
    z-index: 1;
}

.skill-tag {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    background: rgba(6, 182, 212, 0.1);
    border: 1px solid rgba(6, 182, 212, 0.3);
    border-radius: 20px;
    font-size: 0.8125rem;
    color: var(--neon-cyan);
    font-weight: 500;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.skill-tag:hover {
    background: rgba(6, 182, 212, 0.2);
    border-color: rgba(6, 182, 212, 0.5);
    box-shadow: 0 0 10px rgba(6, 182, 212, 0.3);
}

/* Skill System Type Colors */
/* Frontend - Cyan */
.skill-frontend {
    background: rgba(6, 182, 212, 0.1);
    border-color: rgba(6, 182, 212, 0.3);
    color: #06b6d4;
}

.skill-frontend:hover {
    background: rgba(6, 182, 212, 0.2);
    border-color: rgba(6, 182, 212, 0.5);
    box-shadow: 0 0 10px rgba(6, 182, 212, 0.4);
}

/* Backend - Green */
.skill-backend {
    background: rgba(34, 197, 94, 0.1);
    border-color: rgba(34, 197, 94, 0.3);
    color: #22c55e;
}

.skill-backend:hover {
    background: rgba(34, 197, 94, 0.2);
    border-color: rgba(34, 197, 94, 0.5);
    box-shadow: 0 0 10px rgba(34, 197, 94, 0.4);
}

/* Tools & Systems - Orange/Amber */
.skill-tools {
    background: rgba(234, 179, 8, 0.1);
    border-color: rgba(234, 179, 8, 0.3);
    color: #eab308;
}

.skill-tools:hover {
    background: rgba(234, 179, 8, 0.2);
    border-color: rgba(234, 179, 8, 0.5);
    box-shadow: 0 0 10px rgba(234, 179, 8, 0.4);
}

/* Projects */
.project-item {
    display: block;
    background: rgba(6, 182, 212, 0.08);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    transition: all var(--transition-normal);
    text-decoration: none;
    color: inherit;
}

.project-item:hover {
    border-color: var(--neon-cyan);
    background: rgba(6, 182, 212, 0.12);
    box-shadow: 0 8px 24px rgba(6, 182, 212, 0.2);
    transform: translateY(-2px);
}

.project-header {
    margin-bottom: var(--spacing-lg);
}

.project-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.project-title h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin: 0;
}

.project-status {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 0.375rem 0.75rem;
    background: rgba(34, 197, 94, 0.15);
    color: var(--success);
    border-radius: var(--radius-sm);
}

.project-description {
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.6;
}

.project-skills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

/* Tech Stack - Skills */
.tech-stack {
    margin: 0;
    padding: 0;
    border: none;
}

/* Skills Legend */
.skills-legend {
    display: flex;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    justify-content: center;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.legend-frontend {
    background: #06b6d4;
}

.legend-backend {
    background: #22c55e;
}

.legend-tools {
    background: #eab308;
}

.legend-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Footer */
.footer {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--text-muted);
    font-size: 0.875rem;
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    align-items: center;
}

.footer-link {
    color: var(--neon-cyan);
    text-decoration: none;
    font-size: 0.8rem;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--neon-purple);
    text-decoration: underline;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    overflow-y: auto;
    backdrop-filter: blur(5px);
}

.modal:target {
    display: block;
}

.modal-content {
    background: var(--bg-primary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    margin: 2rem auto;
    max-width: 700px;
    position: relative;
    color: var(--text-primary);
}

.modal-close {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    font-size: 2rem;
    color: var(--text-secondary);
    text-decoration: none;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.modal-close:hover {
    color: var(--neon-cyan);
}

.modal-content h2 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--text-primary), var(--neon-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.modal-content h3 {
    font-size: 1.1rem;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    color: var(--neon-cyan);
}

.modal-content p {
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
    color: var(--text-secondary);
}

.modal-content a {
    color: var(--neon-cyan);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.modal-content a:hover {
    color: var(--neon-purple);
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    .logo {
        font-size: 2rem;
    }

    .logo-icon {
        font-size: 1.5rem;
    }

    .glass-card {
        padding: var(--spacing-lg);
        border-radius: var(--radius-lg);
    }

    .nav-section {
        margin: var(--spacing-lg) 0;
    }

    .navigation-list {
        gap: var(--spacing-md);
    }

    .nav-link {
        font-size: 0.85rem;
    }

    .content-section {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .project-card {
        grid-template-columns: 1fr;
    }

    .project-image {
        height: 200px;
    }

    .orb-1, .orb-2, .orb-3 {
        filter: blur(60px);
        opacity: 0.25;
    }

    .orb-1 {
        width: 300px;
        height: 300px;
    }

    .orb-2 {
        width: 250px;
        height: 250px;
    }

    .orb-3 {
        width: 200px;
        height: 200px;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

    .header {
        padding: var(--spacing-lg) var(--spacing-sm);
    }

    .logo {
        font-size: 1.75rem;
    }

    .glass-card {
        padding: var(--spacing-md);
    }

    .glass-card h2 {
        font-size: 1.5rem;
    }

    .nav-section {
        margin: var(--spacing-md) 0;
    }

    .navigation-list {
        gap: var(--spacing-md);
    }

    .nav-link {
        font-size: 0.75rem;
        padding: var(--spacing-xs) 0;
    }

    .content-section {
        padding: var(--spacing-lg) var(--spacing-sm);
    }

    .social-icons {
        gap: 1rem;
    }

    .social-icon {
        height: 36px;
        width: 36px;
    }

    .experience-card {
        padding: var(--spacing-md);
    }

    .exp-header {
        flex-direction: column;
    }

    .project-image {
        height: 150px;
    }
}

/* Large screens */
@media (min-width: 1200px) {
    .main-content {
        padding: var(--spacing-xl);
    }

    .screen {
        max-width: 900px;
    }
}

/* Animations for elements entering */
.experience-card {
    animation: slideUp 0.4s ease forwards;
    opacity: 0;
}

.experience-card:nth-child(1) { animation-delay: 0.1s; }
.experience-card:nth-child(2) { animation-delay: 0.15s; }
.experience-card:nth-child(3) { animation-delay: 0.2s; }

.project-card {
    animation: slideUp 0.4s ease forwards;
    opacity: 0;
}

.project-card:nth-child(1) { animation-delay: 0.1s; }
.project-card:nth-child(2) { animation-delay: 0.2s; }

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

/* Loading State */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
}

.loading::after {
    content: '';
    width: 40px;
    height: 40px;
    border: 3px solid var(--glass-border);
    border-top-color: var(--neon-purple);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .orb {
        animation: none;
    }
}

/* Focus styles */
button:focus-visible,
.nav-link:focus-visible,
.social-icon:focus-visible,
.project-card:focus-visible {
    outline: 2px solid var(--neon-cyan);
    outline-offset: 2px;
}

/* Selection Color */
::selection {
    background-color: var(--neon-purple);
    color: var(--text-primary);
}