/* ===== CSS Variables - Dark Theme ===== */
:root {
    --primary-color: #60a5fa;
    --secondary-color: #3b82f6;
    --accent-color: #93c5fd;
    --coffee-accent: #d4a574;
    --physics-accent: #60a5fa;
    --text-color: #e5e7eb;
    --text-light: #9ca3af;
    --text-muted: #6b7280;
    --bg-color: #000000;
    --bg-secondary: #0a0a0a;
    --bg-tertiary: #1a1a1a;
    --bg-dark: #000000;
    --border-color: #334155;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 20px rgba(96, 165, 250, 0.3);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    position: relative;
    overflow-x: hidden;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

/* Ensure all text elements wrap properly */
p, h1, h2, h3, h4, h5, h6, span, a, li, div {
    word-wrap: break-word;
    overflow-wrap: break-word;
    hyphens: auto;
}

/* Force break very long words that don't have natural break points */
.cv-item *, .skill-category *, .blog-card *, .publication-item *, 
.blog-content *, .cv-subtitle, .cv-details, .cv-list li,
.abstract, .authors, .journal {
    word-break: break-word;
}

/* ===== Animated Background - Bubble Chamber ===== */
.animated-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    background: linear-gradient(180deg, #000814 0%, #001d3d 50%, #000814 100%);
}

.bubble-chamber-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* Section-specific background overlays */
section {
    position: relative;
    background: transparent;
}

section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-color);
    opacity: 0.75;
    z-index: 0;
    pointer-events: none;
}

/* Ensure content is above the overlay */
section > .container {
    position: relative;
    z-index: 1;
}

/* Make hero fully transparent to show background */
.hero::before {
    opacity: 0;
}

/* Performance optimization */
.particle, .connection-line, .energy-wave {
    will-change: transform, opacity;
    pointer-events: none;
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    .particle, .connection-line, .energy-wave {
        animation: none !important;
    }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

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

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

/* ===== Language Selector ===== */
.language-selector {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 999;
    display: flex;
    gap: 0.5rem;
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(10px);
    padding: 0.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.lang-btn {
    padding: 0.5rem;
    border: 2px solid transparent;
    background: transparent;
    color: var(--text-color);
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    line-height: 1;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.flag-icon {
    width: 28px;
    height: 23px;
    border-radius: 3px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    transition: var(--transition);
}

.lang-btn:hover .flag-icon {
    transform: scale(1.1);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
}

.lang-btn:hover {
    border-color: var(--primary-color);
    background: rgba(96, 165, 250, 0.1);
    transform: scale(1.1);
}

.lang-btn.active {
    background: rgba(96, 165, 250, 0.2);
    border-color: var(--primary-color);
    box-shadow: 0 0 15px rgba(96, 165, 250, 0.3);
}

/* ===== Navigation ===== */
#navbar {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    opacity: 0;
    transform: translateY(-10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.logo.visible {
    opacity: 1;
    transform: translateY(0);
}

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

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

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

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    color: white;
    text-align: center;
    padding: 80px 20px 40px;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 800px;
    position: relative;
    z-index: 1;
    background: rgba(30, 41, 59, 0.6);
    padding: 2rem 2.5rem;
    border-radius: 20px;
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
}

.hero-title {
    font-size: 2.8rem;
    margin-bottom: 0.8rem;
    animation: fadeInUp 0.8s ease;
}

.highlight {
    color: #fbbf24;
    text-shadow: 0 0 30px rgba(251, 191, 36, 0.5);
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 1.2rem;
    opacity: 0.95;
    animation: fadeInUp 1s ease;
}

.hero-description {
    font-size: 1rem;
    margin-bottom: 1.5rem;
    opacity: 0.9;
    line-height: 1.8;
    animation: fadeInUp 1.2s ease;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1.4s ease;
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

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

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

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

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

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-color);
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 2px;
}

/* ===== About Section ===== */
.about {
    background: transparent;
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-text p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    color: var(--text-light);
    line-height: 1.8;
}

.skills {
    margin-top: 2rem;
}

.skills h3 {
    margin-bottom: 1rem;
    color: var(--text-color);
}

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

.tag {
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.about-image {
    display: flex;
    justify-content: center;
}

.image-placeholder {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    box-shadow: var(--shadow-glow);
    border: 2px solid var(--border-color);
    overflow: hidden;
    position: relative;
}

.about-image .image-placeholder img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
}

/* ===== Projects Section ===== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.project-card {
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-glow);
    border-color: var(--primary-color);
}

.project-image .image-placeholder {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.2rem;
    font-weight: 600;
    border-bottom: 1px solid var(--border-color);
}

.project-content {
    padding: 1.5rem;
}

.project-content h3 {
    margin-bottom: 1rem;
    color: var(--text-color);
}

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

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

.tag-small {
    background: var(--bg-tertiary);
    color: var(--primary-color);
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
}

/* ===== Publications Section ===== */
.publications {
    background: transparent;
}

.publications-list {
    max-width: 900px;
    margin: 0 auto;
}

.publication-item {
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(10px);
    padding: 2rem;
    margin-bottom: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.publication-item:hover {
    box-shadow: var(--shadow-glow);
    border-color: var(--primary-color);
}

.publication-item h3 {
    color: var(--text-color);
    margin-bottom: 0.75rem;
}

.authors {
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

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

.abstract {
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.pub-link {
    color: var(--primary-color);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

/* ===== Contact Section ===== */
.contact-intro {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 3rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

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

.contact-item h3 {
    margin-bottom: 0.5rem;
    color: var(--text-color);
    font-size: 1rem;
}

.contact-item p {
    color: var(--text-light);
    margin-bottom: 0.25rem;
    font-size: 0.95rem;
}

.contact-form {
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
    background: var(--bg-tertiary);
    color: var(--text-color);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.1);
}

.form-group textarea {
    resize: vertical;
}

.privacy-consent {
    margin-top: 1rem !important;
    margin-bottom: 1.5rem !important;
    text-align: center !important;
}

.privacy-checkbox {
    display: inline-flex !important;
    align-items: center !important;
    gap: 0.35rem !important;
    font-size: 0.85rem;
    color: var(--text-muted);
    cursor: pointer;
}

.privacy-checkbox input[type="checkbox"] {
    margin: 0 !important;
    padding: 0 !important;
    cursor: pointer;
    flex-shrink: 0;
    width: 16px;
    height: 16px;
}

.privacy-text {
    white-space: nowrap;
    display: inline;
    line-height: 1;
}

.privacy-link {
    color: var(--primary-color);
    text-decoration: underline;
    white-space: nowrap;
}

.privacy-link:hover {
    color: #3b82f6;
}

.form-note {
    margin-top: 1rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ===== Footer ===== */
.footer {
    background: var(--bg-dark);
    color: var(--text-light);
    text-align: center;
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
}

.footer p {
    margin-bottom: 0.5rem;
    opacity: 0.8;
}

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

/* ===== Passion Cards (About Section) ===== */
.passions-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.passion-card {
    background: rgba(30, 41, 59, 0.5);
    backdrop-filter: blur(10px);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    transition: var(--transition);
}

.passion-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.passion-card h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.intro-highlight {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-color);
    border-left: 4px solid var(--primary-color);
    padding-left: 1rem;
    margin-bottom: 2rem !important;
}

/* ===== CV/LinkedIn Section ===== */
.cv-section {
    background: transparent;
}

.linkedin-summary {
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 3rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.linkedin-header {
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: 2rem;
    align-items: center;
}

.linkedin-photo img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center;
}

.linkedin-photo .image-placeholder {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
}

.linkedin-info h3 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.linkedin-title {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.linkedin-location {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.linkedin-links {
    display: flex;
    gap: 1rem;
}

.linkedin-btn {
    background: #0077b5;
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    transition: var(--transition);
}

.linkedin-btn:hover {
    background: #005582;
    transform: translateY(-2px);
}

.cv-section-block {
    margin-bottom: 3rem;
}

.cv-section-title {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.cv-item {
    background: rgba(30, 41, 59, 0.5);
    backdrop-filter: blur(10px);
    padding: 1.5rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    overflow-wrap: break-word;
    word-wrap: break-word;
}

.cv-item:hover {
    box-shadow: var(--shadow);
}

.cv-item-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.cv-item-header h4 {
    color: var(--text-color);
    font-size: 1.3rem;
}

.cv-date {
    color: var(--text-light);
    font-weight: 600;
    font-size: 0.95rem;
}

.cv-subtitle {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.cv-details {
    color: var(--text-light);
    margin-bottom: 1rem;
}

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

.cv-list li {
    color: var(--text-light);
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.cv-list li::before {
    content: '▪';
    color: var(--primary-color);
    position: absolute;
    left: 0;
    font-size: 1.2rem;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.skill-category {
    background: rgba(30, 41, 59, 0.5);
    backdrop-filter: blur(10px);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    overflow-wrap: break-word;
    word-wrap: break-word;
}

.skill-category h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.skill-category ul {
    list-style: none;
    padding: 0;
}

.skill-category ul li {
    color: var(--text-light);
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.skill-category ul li::before {
    content: '✓';
    color: var(--primary-color);
    position: absolute;
    left: 0;
    font-weight: bold;
}

.cv-download {
    text-align: center;
    margin-top: 3rem;
}

/* ===== Publications Section ===== */
.section-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 2rem;
    color: var(--text-light);
    font-size: 1.1rem;
}

.publications-filter {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 3rem;
}

.filter-btn {
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--border-color);
    background: white;
    color: var(--text-color);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

.filter-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

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

.publication-item {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
    overflow-wrap: break-word;
    word-wrap: break-word;
}

.publication-year {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-align: center;
}

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

.publication-links .btn {
    padding: 0.6rem 1.2rem;
    border: 2px solid var(--primary-color);
    background: transparent;
    color: var(--primary-color);
    text-decoration: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.publication-links .btn:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(96, 165, 250, 0.3);
}

.publication-links .btn::before {
    font-size: 1rem;
}

.publication-links .btn:first-child::before {
    content: '📄';
}

.publication-links .btn:last-child::before {
    content: '🔗';
}

.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-light);
    font-size: 1.1rem;
}

/* ===== Blog Section ===== */
.blog {
    background: transparent;
}

.blog-categories {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 3rem;
}

.blog-categories-left {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.subscribe-btn {
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--primary-color);
    background: var(--primary-color);
    color: white;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
}

.subscribe-btn:hover {
    background: #3b82f6;
    border-color: #3b82f6;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(96, 165, 250, 0.3);
}

.blog-category-btn {
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--border-color);
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(10px);
    color: var(--text-color);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

.blog-category-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: rgba(30, 41, 59, 0.8);
}

.blog-category-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* ===== Blog Subscription (Hidden - now in overlay) ===== */
.blog-subscription {
    display: none;
}

/* ===== Subscription Modal Overlay ===== */
.subscription-modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(8px);
    z-index: 10000;
    overflow-y: auto;
    padding: 2rem;
    animation: fadeIn 0.3s ease;
}

.subscription-modal-overlay.active {
    display: flex;
    justify-content: center;
    align-items: center;
}

.subscription-modal-content {
    background: rgba(30, 41, 59, 0.95);
    backdrop-filter: blur(20px);
    border: 2px solid var(--primary-color);
    border-radius: 20px;
    padding: 3rem;
    max-width: 600px;
    width: 100%;
    text-align: center;
    box-shadow: 0 20px 60px rgba(96, 165, 250, 0.3);
    position: relative;
    animation: slideUp 0.3s ease;
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.subscription-modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: transparent;
    border: none;
    font-size: 2rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.subscription-modal-close:hover {
    color: var(--text-color);
    background: rgba(255, 255, 255, 0.1);
    transform: rotate(90deg);
}

.subscription-modal-content .subscription-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    animation: bounce 1s ease infinite;
}

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

.subscription-modal-content .subscription-title {
    font-size: 2rem;
    color: var(--text-color);
    margin-bottom: 1rem;
}

.subscription-modal-content .subscription-description {
    color: var(--text-muted);
    margin-bottom: 2rem;
    font-size: 1.1rem;
    line-height: 1.6;
}

.subscription-modal-content .subscription-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.subscription-modal-content .subscription-form input[type="email"] {
    padding: 1rem 1.5rem;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    background: rgba(15, 23, 42, 0.8);
    color: var(--text-color);
    font-size: 1.1rem;
    transition: var(--transition);
}

.subscription-modal-content .subscription-form input[type="email"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(96, 165, 250, 0.15);
}

.subscription-modal-content .subscription-form .privacy-consent {
    display: inline-flex !important;
    align-items: center !important;
    gap: 0.35rem !important;
    text-align: center !important;
    justify-content: center !important;
}

.subscription-modal-content .subscription-form .privacy-consent input[type="checkbox"] {
    width: auto !important;
    margin: 0 !important;
    cursor: pointer;
}

.subscription-modal-content .subscription-form .privacy-consent label {
    display: inline !important;
    margin: 0 !important;
    font-size: 0.9rem;
    color: var(--text-muted);
    cursor: pointer;
}

.subscription-modal-content .subscription-form .privacy-consent .privacy-link {
    color: var(--primary-color);
    text-decoration: underline;
    margin-left: 0;
}

.subscription-modal-content .subscription-form .privacy-consent .privacy-link:hover {
    color: #3b82f6;
}

.subscription-modal-content .subscription-form button {
    padding: 1rem 2rem;
    font-size: 1.1rem;
    border-radius: 12px;
}

.subscription-modal-content .subscription-note {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.subscription-modal-content .subscription-note .privacy-link {
    color: var(--primary-color);
    text-decoration: underline;
}

.subscription-modal-content .subscription-note .privacy-link:hover {
    color: #3b82f6;
}

/* Responsive subscription modal */
@media (max-width: 768px) {
    .subscription-modal-overlay {
        padding: 1rem;
    }
    
    .subscription-modal-content {
        padding: 2rem 1.5rem;
    }
    
    .subscription-modal-content .subscription-icon {
        font-size: 3rem;
    }
    
    .subscription-modal-content .subscription-title {
        font-size: 1.5rem;
    }
    
    .blog-categories {
        justify-content: center;
    }
    
    .blog-categories-left {
        width: 100%;
        justify-content: center;
    }
    
    .subscribe-btn {
        width: 100%;
        justify-content: center;
    }
}

/* Old subscription inline styles - kept for backwards compatibility */
@media (max-width: 768px) {
    .subscription-content {
        padding: 2rem 1.5rem;
    }
    
    .subscription-form {
        flex-direction: column;
    }
    
    .subscription-form button {
        width: 100%;
    }
}

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

.blog-card {
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    overflow-wrap: break-word;
    word-wrap: break-word;
}

.blog-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.blog-image {
    position: relative;
    height: 200px;
}

.blog-image .image-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
}

.blog-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    color: white;
}

.blog-badge.coffee {
    background: #6f4e37;
}

.blog-badge.physics {
    background: #2563eb;
}

.blog-badge.general {
    background: #059669;
}

.blog-content {
    padding: 1.5rem;
}

.blog-meta {
    display: flex;
    justify-content: space-between;
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.blog-date {
    font-weight: 600;
}

.blog-read-time {
    font-style: italic;
}

.blog-content h3 {
    margin-bottom: 1rem;
    color: var(--text-color);
}

.blog-content p {
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.7;
}

/* ===== Blog Actions (Like Button) ===== */
.blog-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    padding-top: 0.5rem;
}

.like-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(30, 41, 59, 0.6);
    border: 2px solid var(--border-color);
    border-radius: 25px;
    color: var(--text-color);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.like-btn:hover {
    border-color: var(--primary-color);
    background: rgba(30, 41, 59, 0.8);
    transform: translateY(-2px);
}

.like-btn.liked {
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
}

.like-btn.liked .like-icon {
    animation: heartBeat 0.5s ease;
}

@keyframes heartBeat {
    0%, 100% { transform: scale(1); }
    25% { transform: scale(1.3); }
    50% { transform: scale(1.1); }
    75% { transform: scale(1.2); }
}

.like-icon {
    font-size: 1.2rem;
    display: inline-block;
    filter: grayscale(100%);
    transition: filter 0.3s ease;
}

.like-btn.liked .like-icon {
    filter: grayscale(0%);
}

.like-count {
    font-weight: 700;
    min-width: 20px;
    text-align: center;
}

.like-text {
    font-size: 0.85rem;
}

/* ===== Comment Button ===== */
.comment-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(30, 41, 59, 0.6);
    border: 2px solid var(--border-color);
    border-radius: 25px;
    color: var(--text-color);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.comment-btn:hover {
    border-color: var(--primary-color);
    background: rgba(30, 41, 59, 0.8);
    transform: translateY(-2px);
}

.comment-icon {
    font-size: 1.2rem;
    display: inline-block;
}

.comment-count {
    font-weight: 700;
    min-width: 20px;
    text-align: center;
}

.comment-text {
    font-size: 0.85rem;
}

.read-more {
    color: var(--primary-color);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: none;
    border: none;
    padding: 0;
    font-size: 1rem;
    font-family: inherit;
    cursor: pointer;
    transition: var(--transition);
}

.read-more:hover {
    gap: 0.75rem;
}

/* ===== Contact Section Updates ===== */
.contact-content {
    display: grid;
    grid-template-columns: 1.2fr 2fr 1.2fr;
    gap: 2rem;
    align-items: start;
}

.contact-info {
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.contact-form {
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(10px);
    padding: 2.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.contact-info-form {
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.form-title {
    margin-bottom: 1.5rem;
    color: var(--text-color);
    font-size: 1.25rem;
    text-align: center;
}

.contact-form .form-title {
    font-size: 1.5rem;
}

.contact-info h3 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .language-selector {
        top: auto;
        bottom: 20px;
        right: 20px;
        flex-direction: column;
    }

    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-color);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .about-image {
        order: -1;
    }

    .image-placeholder {
        width: 250px;
        height: 250px;
    }

    .linkedin-header {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .linkedin-photo {
        display: flex;
        justify-content: center;
    }

    .linkedin-links {
        justify-content: center;
    }

    .publication-item {
        grid-template-columns: 1fr;
    }

    .publication-year {
        text-align: left;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .contact-info-form {
        grid-column: span 1;
    }

    .section-title {
        font-size: 2rem;
    }

    section {
        padding: 3rem 0;
    }
    
    .like-btn,
    .comment-btn {
        padding: 0.4rem 0.8rem;
        font-size: 0.85rem;
        gap: 0.4rem;
    }
    
    .like-icon,
    .comment-icon {
        font-size: 1rem;
    }
    
    .like-text,
    .comment-text {
        display: none;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}

/* ===== Blog Modal Styles ===== */
.blog-modal {
    display: none;
    position: fixed;
    z-index: 10000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(8px);
    overflow-y: auto;
    animation: fadeIn 0.3s ease;
}

.blog-modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.blog-modal-content {
    background: #ffffff;
    border-radius: 12px;
    max-width: 900px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: slideUp 0.4s ease;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

/* Custom scrollbar for modal */
.blog-modal-content::-webkit-scrollbar {
    width: 12px;
}

.blog-modal-content::-webkit-scrollbar-track {
    background: #e5e7eb;
    border-radius: 0 12px 12px 0;
}

.blog-modal-content::-webkit-scrollbar-thumb {
    background: #6b7280;
    border-radius: 6px;
}

.blog-modal-content::-webkit-scrollbar-thumb:hover {
    background: #4b5563;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.blog-modal-close {
    position: sticky;
    top: 1rem;
    right: 1rem;
    float: right;
    font-size: 2.5rem;
    font-weight: 300;
    color: #1f2937;
    background: rgba(243, 244, 246, 0.9);
    border: none;
    border-radius: 50%;
    width: 45px;
    height: 45px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    z-index: 10;
    margin-bottom: -45px;
}

.blog-modal-close:hover {
    background: var(--primary-color);
    transform: rotate(90deg);
}

.blog-modal-header {
    padding: 3rem 3rem 2rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.blog-modal-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.blog-modal-badge.coffee {
    background: rgba(111, 78, 55, 0.15);
    color: #6f4e37;
}

.blog-modal-badge.physics {
    background: rgba(37, 99, 235, 0.15);
    color: #2563eb;
}

.blog-modal-badge.general {
    background: rgba(5, 150, 105, 0.15);
    color: #059669;
}

.blog-modal-title {
    font-size: 2.25rem;
    color: #1f2937;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.blog-modal-meta {
    display: flex;
    gap: 1.5rem;
    color: #6b7280;
    font-size: 0.95rem;
}

.blog-modal-body {
    padding: 2rem 3rem 2rem;
    color: #374151;
    line-height: 1.8;
    font-size: 1.1rem;
}

.blog-modal-body p {
    margin-bottom: 1.5rem;
}

.blog-modal-body p:last-child {
    margin-bottom: 0;
}

.blog-modal-footer {
    padding: 2rem 3rem 3rem;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.blog-modal-actions {
    display: flex;
    align-items: center;
}

.blog-modal-like-btn {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    background: #e5e7eb;
    border: 2px solid #9ca3af;
    color: #1f2937;
}

.blog-modal-like-btn:hover {
    background: #d1d5db;
    border-color: #6b7280;
}

.blog-modal-like-btn.liked {
    background: #fee2e2;
    border-color: #ef4444;
    color: #991b1b;
}

.blog-modal-like-btn .like-icon {
    font-size: 1.4rem;
}

.blog-modal-like-btn .like-count {
    font-size: 1.1rem;
    min-width: 30px;
    font-weight: 700;
    color: #1f2937;
}

.blog-modal-like-btn .like-text {
    color: #1f2937;
    font-weight: 600;
}

.blog-modal-download {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    transition: var(--transition);
}

.blog-modal-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(96, 165, 250, 0.3);
}

/* ===== Blog Modal Comments Section ===== */
.blog-modal-comments {
    padding: 2rem 3rem;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.comments-title {
    font-size: 1.5rem;
    color: #1f2937;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.comments-count-display {
    font-size: 1.2rem;
    color: #6b7280;
}

.comment-form {
    background: #e5e7eb;
    padding: 1.5rem;
    border-radius: 12px;
    margin-bottom: 2rem;
    border: 1px solid #d1d5db;
}

.comment-form .form-group {
    margin-bottom: 1rem;
}

.comment-form input,
.comment-form textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #9ca3af;
    border-radius: 8px;
    background: #ffffff;
    color: #1f2937;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.comment-form input::placeholder,
.comment-form textarea::placeholder {
    color: #6b7280;
}

.comment-form textarea {
    resize: vertical;
    min-height: 80px;
}

.comment-form input:focus,
.comment-form textarea:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.comment-submit-btn {
    width: 100%;
    padding: 0.75rem 1.5rem;
    background: #60a5fa !important;
    color: white !important;
    border: none !important;
}

.comment-submit-btn:hover {
    background: #3b82f6 !important;
}

.comments-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.comment-item {
    background: #f3f4f6 !important;
    padding: 1.25rem;
    border-radius: 10px;
    border-left: 3px solid #60a5fa;
    position: relative;
}

.comment-item::before {
    display: none !important;
}

.comment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
    position: relative;
    z-index: 10;
}

.comment-author {
    font-weight: 700 !important;
    color: #60a5fa !important;
    font-size: 1rem;
}

.comment-item strong.comment-author {
    color: #60a5fa !important;
    font-weight: 700 !important;
}

.comment-item .comment-header strong {
    color: #60a5fa !important;
    font-weight: 700 !important;
}

.comment-date {
    font-size: 0.85rem;
    color: #4b5563 !important;
}

.comment-body {
    color: #000000 !important;
    line-height: 1.6;
    font-size: 1rem !important;
    font-weight: 600 !important;
    position: relative;
    z-index: 10;
    background: transparent !important;
    text-shadow: 0 0 1px #000000;
}

.comment-text {
    color: #6b7280 !important;
    line-height: 1.6;
    font-size: 1rem !important;
    font-weight: 500 !important;
    position: relative;
    z-index: 10;
    background: transparent !important;
    margin: 0 !important;
}

.comments-empty {
    text-align: center;
    padding: 2rem;
    color: #6b7280;
    font-style: italic;
}

.blog-modal-download svg {
    transition: var(--transition);
}

.blog-modal-download:hover svg {
    transform: translateY(2px);
}

/* Scrollbar styling for modal */
.blog-modal-content::-webkit-scrollbar {
    width: 10px;
}

.blog-modal-content::-webkit-scrollbar-track {
    background: var(--bg-primary);
    border-radius: 0 12px 12px 0;
}

.blog-modal-content::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 5px;
}

.blog-modal-content::-webkit-scrollbar-thumb:hover {
    background: #3b82f6;
}

/* Responsive modal */
@media (max-width: 768px) {
    .blog-modal.active {
        padding: 1rem;
    }
    
    .blog-modal-header {
        padding: 2rem 1.5rem 1.5rem;
    }
    
    .blog-modal-title {
        font-size: 1.75rem;
    }
    
    .blog-modal-body {
        padding: 1.5rem 1.5rem 1rem;
        font-size: 1rem;
    }
    
    .blog-modal-comments {
        padding: 1.5rem;
    }
    
    .comments-title {
        font-size: 1.25rem;
    }
    
    .comment-form {
        padding: 1rem;
    }
    
    .blog-modal-footer {
        padding: 1.5rem;
        flex-direction: column;
        gap: 1rem;
    }
    
    .blog-modal-like-btn {
        width: 100%;
        justify-content: center;
    }
    
    .blog-modal-download {
        width: 100%;
        justify-content: center;
    }
    
    .blog-modal-close {
        width: 40px;
        height: 40px;
        font-size: 2rem;
    }
}

/* ===== CMS Loading States ===== */
.cms-loader {
    text-align: center;
    padding: 3rem;
    color: var(--text-light);
    font-size: 1.1rem;
    grid-column: 1 / -1;
}

.cms-loader::before {
    content: '⚛️';
    display: block;
    font-size: 3rem;
    margin-bottom: 1rem;
    animation: spin 2s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}