/* Neue Main CSS */
/* CSS Variables */

:root {
    /* Colors */
    --primary-color: #2563eb;
    --secondary-color: #7c3aed;
    --accent-color: #06b6d4;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --bg-color: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --border-color: #e5e7eb;
    --success-color: #10b981;
    --error-color: #ef4444;
    
    /* Dark Mode Colors */
    --dark-bg: #0f172a;
    --dark-bg-secondary: #1e293b;
    --dark-bg-tertiary: #334155;
    --dark-text: #f1f5f9;
    --dark-text-light: #cbd5e1;
    --dark-border: #475569;
    
    /* Spacing */
    --section-padding: 100px 0;
    --container-padding: 0 20px;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-code: 'Fira Code', monospace;
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --text-color: var(--dark-text);
    --text-light: var(--dark-text-light);
    --bg-color: var(--dark-bg);
    --bg-secondary: var(--dark-bg-secondary);
    --bg-tertiary: var(--dark-bg-tertiary);
    --border-color: var(--dark-border);
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-primary);
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.6;
    transition: var(--transition);
    overflow-x: hidden;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 1rem;
    color: var(--text-light);
}

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

a:hover {
    color: var(--secondary-color);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    outline: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-color);
    border: 2px solid var(--border-color);
}

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

/* Loading Screen */
#loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-color);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

#loader.fade-out {
    opacity: 0;
    pointer-events: none;
}

.loader-content {
    text-align: center;
}

.loader-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

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

/* Navigation */
#navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--bg-color);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: var(--transition);
}

#navbar.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}

[data-theme="dark"] #navbar.scrolled {
    background-color: rgba(15, 23, 42, 0.95);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: var(--text-color);
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    transition: width 0.3s ease;
}

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

.nav-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.language-toggle button,
.theme-toggle button {
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--text-color);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 0.5rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.language-toggle button:hover,
.theme-toggle button:hover {
    background-color: var(--bg-tertiary);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: var(--section-padding);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero-particles {
    width: 100%;
    height: 100%;
    position: relative;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: 1rem;
    animation: fadeInUp 0.8s ease;
}

.name-highlight {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: block;
}

.hero-subtitle {
    font-size: clamp(1.5rem, 3vw, 2rem);
    color: var(--text-light);
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.typing-cursor {
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 49% { opacity: 1; }
    50%, 100% { opacity: 0; }
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    animation: fadeInUp 0.8s ease 0.6s both;
}

.hero-social {
    display: flex;
    gap: 1rem;
    animation: fadeInUp 0.8s ease 0.8s both;
}

.hero-social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--bg-tertiary);
    color: var(--text-color);
    transition: var(--transition);
}

.hero-social a:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

.hero-image {
    animation: fadeInRight 0.8s ease 0.4s both;
}

.image-wrapper {
    position: relative;
    display: inline-block;
}

.hero-image img {
    width: 100%;
    max-width: 400px;
    height: auto;
    border-radius: 1rem;
    box-shadow: var(--shadow-xl);
}

.image-decoration {
    position: absolute;
    top: -20px;
    right: -20px;
    width: 100%;
    height: 100%;
    border: 3px solid var(--primary-color);
    border-radius: 1rem;
    z-index: -1;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-light);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { 
        transform: translateX(-50%) translateY(0); 
    }
    40% { 
        transform: translateX(-50%) translateY(-10px); 
    }
    60% { 
        transform: translateX(-50%) translateY(-5px); 
    }
}

/* Section Styles */
section {
    padding: var(--section-padding);
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    display: inline-block;
    width: 100%;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

/* Projects */
.projects-filter {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
}

.filter-btn {
    padding: 0.5rem 1.5rem;
    background-color: var(--bg-tertiary);
    border: none;
    border-radius: 2rem;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.filter-btn.active,
.filter-btn:hover {
    background-color: var(--primary-color);
    color: white;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    background-color: var(--bg-secondary);
    border-radius: 1rem;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow);
    position: relative;
}

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

/* Project Header with Status */
.project-header {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 10;
}

.project-status {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.8rem;
    border-radius: 2rem;
    font-size: 0.85rem;
    font-weight: 600;
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.project-status.completed {
    background-color: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #10b981;
}

.project-status.in-progress {
    background-color: rgba(251, 191, 36, 0.15);
    border: 1px solid rgba(251, 191, 36, 0.3);
    color: #f59e0b;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.project-status.completed .status-dot {
    background-color: #10b981;
}

.project-status.in-progress .status-dot {
    background-color: #f59e0b;
}

@keyframes pulse {
    0% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.6;
        transform: scale(1.2);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

/* Dark mode adjustments for status */
[data-theme="dark"] .project-status.completed {
    background-color: rgba(16, 185, 129, 0.2);
    border-color: rgba(16, 185, 129, 0.4);
}

[data-theme="dark"] .project-status.in-progress {
    background-color: rgba(251, 191, 36, 0.2);
    border-color: rgba(251, 191, 36, 0.4);
}

/* Project Image Container - Icon Version */
.project-image {
    height: 200px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.project-image i {
    font-size: 4rem;
    color: white;
    transition: all 0.3s ease;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

/* Hover Effects für Project Cards */
.project-card:hover .project-image {
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
}

.project-card:hover .project-image i {
    transform: scale(1.1) rotate(5deg);
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

/* Gradient Animation für Project Images */
.project-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, 
        transparent, 
        rgba(255, 255, 255, 0.1), 
        transparent
    );
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.project-card:hover .project-image::before {
    transform: translateX(100%);
}

/* Spezielle Icons für verschiedene Kategorien */
.project-card[data-category="research"] .project-image {
    background: linear-gradient(135deg, var(--primary-color), #8b5cf6);
}

.project-card[data-category="development"] .project-image {
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
}

/* Zusätzliche Icon-Animationen */
@keyframes iconPulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.project-image i {
    animation: iconPulse 3s ease-in-out infinite;
}

.project-card:hover .project-image i {
    animation: none;
}

/* Icon-spezifische Styles */
.project-image .fa-microchip {
    /* Ray Tracer - 3D Look */
    filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.3));
}

.project-image .fa-gamepad {
    /* Gaming - Playful */
    transform-origin: center;
}

.project-image .fa-mobile-alt {
    /* Mobile - Clean */
    font-weight: 300;
}

.project-image .fa-brain {
    /* AI/ML - Smart */
    filter: drop-shadow(0 0 15px rgba(255, 255, 255, 0.4));
}

.project-image .fa-graduation-cap {
    /* Education - Academic */
    transform-origin: center bottom;
}

.project-image .fa-lungs {
    /* Medical/Health - Care */
    filter: drop-shadow(0 0 12px rgba(255, 255, 255, 0.35));
}

.project-content {
    padding: 1.5rem;
}

/* Modernized Tech Tags */
.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1rem 0;
}

.tech-tag {
    font-size: 0.75rem;
    padding: 0.35rem 0.75rem;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(124, 58, 237, 0.1));
    border: 1px solid rgba(37, 99, 235, 0.2);
    border-radius: 0.5rem;
    color: var(--text-color);
    font-weight: 500;
    letter-spacing: 0.025em;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.tech-tag::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(37, 99, 235, 0.2), transparent);
    transition: left 0.5s ease;
}

.tech-tag:hover::before {
    left: 100%;
}

.tech-tag:hover {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.2), rgba(124, 58, 237, 0.2));
    border-color: rgba(37, 99, 235, 0.4);
    transform: translateY(-1px);
}

/* Dark mode for tech tags */
[data-theme="dark"] .tech-tag {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.15), rgba(124, 58, 237, 0.15));
    border-color: rgba(37, 99, 235, 0.3);
}

[data-theme="dark"] .tech-tag:hover {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.25), rgba(124, 58, 237, 0.25));
    border-color: rgba(37, 99, 235, 0.5);
}

.project-title {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.project-description {
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.project-links {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.project-links a {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border: 1px solid var(--primary-color);
    border-radius: 0.5rem;
    transition: all 0.3s ease;
}

.project-links a:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .project-header {
        top: 0.75rem;
        right: 0.75rem;
    }
    
    .project-status {
        font-size: 0.8rem;
        padding: 0.35rem 0.7rem;
    }
    
    .project-image {
        height: 180px;
    }
    
    .project-image i {
        font-size: 3.5rem;
    }
    
    .tech-tag {
        font-size: 0.7rem;
        padding: 0.3rem 0.6rem;
    }
}

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

.skill-category {
    background-color: var(--bg-secondary);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow);
}

.skill-category h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.skill-items {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.skill-item {
    padding: 0.5rem 1rem;
    background-color: var(--bg-tertiary);
    border-radius: 0.5rem;
    font-size: 0.9rem;
    transition: var(--transition);
}

.skill-item:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

/* Achievements */
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.achievement-card {
    background-color: var(--bg-secondary);
    border-radius: 1rem;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    height: 480px;
    overflow: hidden;
    position: relative;
}

.achievement-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.achievement-icon {
    width: 100%;
    height: 240px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-size: 4rem;
    margin-bottom: 0;
}

.achievement-image {
    width: 100%;
    height: 200px;
    margin-bottom: 0;
    overflow: hidden;
    position: relative;
}

.achievement-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.achievement-card:hover .achievement-image img {
    transform: scale(1.1);
}

.achievement-card h3 {
    font-size: 1.25rem;
    margin: 1rem 1rem 0.5rem;
    min-height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.achievement-date {
    font-size: 0.9rem;
    color: var(--text-light);
    margin: 0 1rem 0.5rem;
    font-weight: 700;
}

.achievement-card p:not(.achievement-date) {
    padding: 0 1.5rem;
    font-size: 0.95rem;
    flex: 1;
    display: flex;
    align-items: center;
}

.achievement-link {
    margin-top: auto;
    padding: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    font-weight: 500;
    transition: var(--transition);
}

.achievement-link:hover {
    gap: 0.75rem;
}

/* CV Section */
.cv-section {
    padding: var(--section-padding);
}

.cv-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 3rem;
    max-width: 900px;
    margin: 0 auto;
}

.cv-card {
    background-color: var(--bg-secondary);
    border-radius: 1rem;
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.cv-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.cv-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.cv-preview {
    margin-bottom: 1.5rem;
    cursor: pointer;
}

/* PDF Preview mit Hintergrundbild */
.cv-document {
    position: relative;
    width: 100%;
    height: 300px;
    background-image: url("../images/Paul_Hartung_CV_ENG.png");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    border: 2px solid var(--border-color);
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    transition: var(--transition);
}

/* Für German CV */
.cv-document.german {
    background-image: url("../images/Paul_Hartung_CV_GER.png");
}

/* Semi-transparenter Overlay für bessere Lesbarkeit */
.cv-document::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(1px);
    transition: var(--transition);
}

.cv-document:hover::before {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(0px);
}

/* PDF Icon wird kleiner und weniger prominent */
.cv-icon {
    font-size: 2rem;
    color: var(--primary-color);
    opacity: 0.8;
    position: relative;
    z-index: 2;
    background: rgba(255, 255, 255, 0.9);
    padding: 1rem;
    border-radius: 50%;
    transition: var(--transition);
}

[data-theme="dark"] .cv-icon {
    background: rgba(15, 23, 42, 0.9);
}

.cv-document:hover .cv-icon {
    opacity: 0;
    transform: scale(0.8);
}

/* Hover Overlay - "View PDF" Text */
.cv-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(37, 99, 235, 0.95);
    color: white;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    opacity: 0;
    transition: var(--transition);
    z-index: 3;
}

.cv-overlay i {
    font-size: 3rem;
}

.cv-overlay span {
    font-size: 1.2rem;
    font-weight: 600;
}

.cv-document:hover .cv-overlay {
    opacity: 1;
}

/* Download Button */
.cv-download {
    width: 100%;
    justify-content: center;
}

/* Zoom effect on hover */
.cv-preview a {
    display: block;
    transition: var(--transition);
}

.cv-preview:hover a {
    transform: perspective(1000px) rotateX(2deg);
}

/* Shimmer effect */
.cv-document::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.2),
        transparent
    );
    transition: left 0.6s ease;
    z-index: 1;
}

.cv-document:hover::after {
    left: 100%;
}

/* Responsive adjustments for CV section */
@media (max-width: 768px) {
    .cv-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .cv-document {
        height: 250px;
    }
    
    .cv-icon {
        font-size: 1.5rem;
        padding: 0.75rem;
    }
    
    .cv-overlay i {
        font-size: 2.5rem;
    }
}

@media (max-width: 480px) {
    .cv-card {
        padding: 1.5rem;
    }
    
    .cv-document {
        height: 200px;
    }
    
    .cv-icon {
        font-size: 1.25rem;
        padding: 0.5rem;
    }
    
    .cv-card h3 {
        font-size: 1.25rem;
    }
}

/* Contact */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-details {
    margin: 2rem 0;
}

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

.contact-item i {
    color: var(--primary-color);
    width: 20px;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--bg-tertiary);
    border-radius: 50%;
    transition: var(--transition);
}

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

/* Contact Form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    position: relative;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    background-color: var(--bg-tertiary);
    border: 2px solid transparent;
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
    color: var(--text-color);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: var(--bg-color);
}

.form-group label {
    position: absolute;
    left: 1rem;
    top: 1rem;
    color: var(--text-light);
    transition: var(--transition);
    pointer-events: none;
}

.form-group input:focus ~ label,
.form-group input:not(:placeholder-shown) ~ label,
.form-group textarea:focus ~ label,
.form-group textarea:not(:placeholder-shown) ~ label {
    top: -0.75rem;
    left: 0.75rem;
    font-size: 0.85rem;
    color: var(--primary-color);
    background-color: var(--bg-color);
    padding: 0 0.5rem;
}

.form-status {
    text-align: center;
    margin-top: 1rem;
}

/* Security Features Styling */
.security-features {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin: 1.5rem 0;
}

.security-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 2rem;
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: var(--shadow);
}

.security-badge i {
    font-size: 1rem;
}

/* Connection Status */
.connection-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background-color: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
}

[data-theme="dark"] .connection-status {
    background-color: #064e3b;
    color: #86efac;
    border-color: #065f46;
}

.connection-status i {
    color: #10b981;
}

[data-theme="dark"] .connection-status i {
    color: #34d399;
}

/* CAPTCHA Styling */
.captcha-group {
    background-color: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

.captcha-group:hover {
    border-color: var(--primary-color);
}

.captcha-question {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    font-size: 1.1rem;
    color: var(--text-color);
}

.captcha-question i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

.captcha-question strong {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-size: 1.3rem;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    border: 2px dashed var(--primary-color);
    min-width: 120px;
    text-align: center;
    font-family: var(--font-code);
}

.captcha-refresh {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 35px;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-light);
}

.captcha-refresh:hover {
    background-color: var(--primary-color);
    color: white;
    transform: rotate(180deg);
}

.captcha-input {
    margin: 0;
    max-width: 200px;
}

.captcha-input input {
    text-align: center;
    font-size: 1.1rem;
    font-weight: 600;
}

/* Success state for correct CAPTCHA */
.captcha-group.correct {
    border-color: var(--success-color);
    background-color: rgba(16, 185, 129, 0.1);
}

.captcha-group.correct .captcha-question i {
    color: var(--success-color);
}

/* Error state for incorrect CAPTCHA */
.captcha-group.error {
    border-color: var(--error-color);
    background-color: rgba(239, 68, 68, 0.1);
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* Security Notice */
.security-notice {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin-top: 1rem;
    padding: 0.75rem;
    background-color: var(--bg-tertiary);
    border-radius: 0.5rem;
    border-left: 4px solid var(--primary-color);
}

.security-notice i {
    color: var(--primary-color);
    margin-top: 0.1rem;
    flex-shrink: 0;
}

.security-notice small {
    color: var(--text-light);
    line-height: 1.4;
}

/* Form Status Messages */
.form-status {
    display: none;
    margin-top: 1rem;
}

.status-message {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    border-radius: 0.5rem;
    font-weight: 500;
}

.status-message.success {
    background-color: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.status-message.error {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

[data-theme="dark"] .status-message.success {
    background-color: #064e3b;
    color: #86efac;
    border-color: #065f46;
}

[data-theme="dark"] .status-message.error {
    background-color: #7f1d1d;
    color: #fca5a5;
    border-color: #991b1b;
}

/* Update button styling */
.btn-primary i {
    margin-right: 0.5rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .security-features {
        flex-direction: column;
    }
    
    .security-badge {
        justify-content: center;
    }
    
    .captcha-question {
        flex-wrap: wrap;
        justify-content: center;
        text-align: center;
    }
    
    .captcha-question strong {
        min-width: 100px;
        font-size: 1.2rem;
    }
    
    .project-image {
        height: 180px;
    }
    
    .project-image i {
        font-size: 3.5rem;
    }
}

@media (max-width: 480px) {
    .project-image {
        height: 160px;
    }
    
    .project-image i {
        font-size: 3rem;
    }
}

/* Footer */
.footer {
    background-color: var(--bg-secondary);
    text-align: center;
    padding: 2rem 0;
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--secondary-color);
    transform: translateY(-3px);
}

/* Animations */
@keyframes fadeIn {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

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