styles.css

/* ===== CSS Variables ===== */
:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --bg-card: #1c2128;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --accent-primary: #2dd4bf;
    --accent-secondary: #14b8a6;
    --accent-dark: #0d9488;
    --border-color: #30363d;
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.3);
    --modal-overlay: rgba(0, 0, 0, 0.8);
    --transition: all 0.3s ease;
    --radius: 12px;
    --radius-sm: 8px;
}

/* Light Mode */
[data-theme="light"] {
    --bg-primary: #ebebeb;
    --bg-secondary: #d0d8db;
    --bg-tertiary: #e8f2fd;
    --bg-card: #f3fbff;
    --text-primary: #1f2328;
    --text-secondary: #656d76;
    --text-muted: #8b949e;
    --accent-primary: #064742;
    --accent-secondary: #0b5c52;
    --accent-dark: #000000;
    --border-color: #244361;
    --shadow: 0 8px 24px rgba(140, 149, 159, 0.2);
    --shadow-sm: 0 4px 12px rgba(140, 149, 159, 0.15);
    --modal-overlay: rgba(0, 0, 0, 0.5);
}

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

html {
    scroll-behavior: smooth;
}

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

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

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

/* ===== Header/Navigation ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 0 2rem;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.nav-links {
    display: flex;
    gap: 0.5rem;
}

.nav-link {
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    border: none;
    background: none;
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.nav-link.active {
    color: var(--accent-primary);
    background: rgba(45, 212, 191, 0.1);
}

/* Theme Toggle */
.theme-toggle {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: var(--transition);
    margin-left: 0.5rem;
}

.theme-toggle:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: rotate(15deg);
}

[data-theme="light"] .theme-toggle .fa-sun {
    display: none;
}

[data-theme="dark"] .theme-toggle .fa-moon,
:root:not([data-theme]) .theme-toggle .fa-moon {
    display: none;
}

/* ===== Main Container ===== */
.main-container {
    max-width: 100%;
    margin: 0;
    padding: 70px 0 0 0;
    min-height: 100vh;
}

.main-container:has(.about-hero) {
    padding: 70px 0 0 0;
}

/* ===== Section Styles ===== */
.section {
    animation: fadeIn 0.4s ease;
}

.section:not(:has(.about-hero)) {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

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

.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.section-title i {
    color: var(--accent-primary);
}

/* ===== About/CV Section ===== */
.about-hero {
    display: flex;
    gap: 0;
    margin-bottom: 0;
    align-items: stretch;
    min-height: calc(100vh - 100px);
}

.profile-sidebar {
    width: 500px;
    min-width: 500px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: 2rem;
    position: fixed;
    top: 70px;
    left: 0;
    bottom: 0;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.profile-card {
    background: transparent;
    border-radius: 0;
    padding: 0;
    text-align: center;
    border: none;
    position: static;
    width: 100%;
}

.profile-image {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: var(--bg-primary);
    border: 4px solid var(--accent-primary);
}

.profile-name {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.profile-title {
    color: var(--accent-primary);
    font-weight: 500;
    margin-bottom: 1.5rem;
}

.contact-info {
    text-align: left;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.contact-item:last-child {
    border-bottom: none;
}

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

.about-content {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-left: 500px;
    padding: 2rem 4rem;
    width: calc(100% - 500px);
    max-width: none;
    align-items: center;
}

.about-content .card {
    width: 100%;
    max-width: 900px;
}

/* ===== Card Styles ===== */
.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 2rem;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.card:hover {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-sm);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-title i {
    color: var(--accent-primary);
}

/* ===== Education ===== */
.education-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.education-item {
    padding: 1rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--accent-primary);
}

.education-degree {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.education-school {
    color: var(--accent-primary);
    font-size: 0.95rem;
}

.education-details {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

/* ===== Experience Timeline ===== */
.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent-primary), var(--accent-dark));
}

.timeline-item {
    position: relative;
    padding-bottom: 2rem;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: -2rem;
    top: 0;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent-primary);
    transform: translateX(-5px);
    box-shadow: 0 0 0 4px var(--bg-primary);
}

.timeline-date {
    color: var(--accent-primary);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.timeline-title {
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.timeline-company {
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.timeline-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

.timeline-description li {
    margin-bottom: 0.5rem;
    padding-left: 0.5rem;
}

/* ===== Skills ===== */
.skills-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.skill-tag {
    background: rgba(45, 212, 191, 0.15);
    color: var(--accent-primary);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid rgba(45, 212, 191, 0.3);
    transition: var(--transition);
}

.skill-tag:hover {
    background: rgba(45, 212, 191, 0.25);
    transform: translateY(-2px);
}

.skill-category {
    margin-bottom: 1.5rem;
}

.skill-category:last-child {
    margin-bottom: 0;
}

.skill-category-title {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    font-weight: 500;
}

/* ===== Projects Grid ===== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 1.5rem;
}

.project-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.project-icon {
    font-size: 2.5rem;
    color: var(--accent-primary);
}

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

.project-link {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    transition: var(--transition);
}

.project-link:hover {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

.project-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.project-date {
    color: var(--accent-primary);
    font-size: 0.85rem;
    margin-bottom: 0.75rem;
}

.project-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    flex-grow: 1;
    margin-bottom: 1rem;
}

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

.tech-tag {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.75rem;
    font-weight: 500;
}

/* ===== Research Section ===== */
.research-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.research-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.research-card:hover {
    border-color: var(--accent-primary);
}

.research-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.research-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}

.research-meta span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.research-meta i {
    color: var(--accent-primary);
}

.research-abstract {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

.research-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
    color: var(--accent-primary);
    font-weight: 500;
    font-size: 0.9rem;
}

.research-link:hover {
    text-decoration: underline;
}

/* ===== Blog Section ===== */
.blog-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.blog-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition);
}

.blog-card:hover {
    border-color: var(--accent-primary);
    transform: translateX(8px);
}

.blog-date {
    color: var(--accent-primary);
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
}

.blog-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.blog-excerpt {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-primary);
    font-weight: 500;
    font-size: 0.9rem;
    margin-top: 1rem;
}

/* ===== Modal ===== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--modal-overlay);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 2rem;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: var(--radius);
    max-width: 800px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
    padding: 2rem;
    border: 1px solid var(--border-color);
    position: relative;
}

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

.modal-close:hover {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

.modal-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    padding-right: 3rem;
}

.modal-date {
    color: var(--accent-primary);
    margin-bottom: 1.5rem;
}

.modal-body {
    color: var(--text-secondary);
    line-height: 1.8;
}

.modal-body p {
    margin-bottom: 1rem;
}

/* ===== Full-Page Blog View ===== */
.blog-fullpage {
    max-width: 100% !important;
    padding: 2rem !important;
    min-height: calc(100vh - 70px);
    animation: fadeIn 0.4s ease;
}

.blog-fullpage-pdf {
    display: flex;
    flex-direction: column;
}

.blog-back-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.25rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 2rem;
}

.blog-back-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateX(-4px);
}

.blog-full-article {
    max-width: 820px;
    margin: 0 auto;
    width: 100%;
}

.blog-fullpage-pdf .blog-full-article {
    max-width: 100%;
}

.blog-full-header {
    margin-bottom: 2.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.blog-full-date {
    color: var(--accent-primary);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
}

.blog-full-title {
    font-size: 2.25rem;
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-primary);
}

.blog-full-body {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.9;
}

.blog-full-body p {
    margin-bottom: 1.25rem;
}

/* ===== Full-Page PDF Viewer ===== */
.blog-pdf-body {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.blog-pdf-viewer {
    width: 100%;
    height: calc(100vh - 280px);
    min-height: 500px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: #fff;
}

.pdf-download-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--accent-primary);
    color: var(--bg-primary);
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
}

.pdf-download-link:hover {
    background: var(--accent-secondary);
    color: var(--bg-primary);
    transform: translateY(-2px);
}

/* ===== Achievements ===== */
.achievements-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.achievement-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

.achievement-item i {
    color: var(--accent-primary);
    margin-top: 0.2rem;
}

/* ===== Footer ===== */
.footer {
    text-align: center;
    padding: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 3rem;
}

/* ===== Responsive ===== */

/* Large screens - wider sidebar */
@media (min-width: 1400px) {
    .profile-sidebar {
        width: 500px;
        min-width: 500px;
    }
    
    .about-content {
        margin-left: 500px;
        width: calc(100% - 500px);
    }
}

/* Medium-large screens */
@media (min-width: 901px) and (max-width: 1399px) {
    .profile-sidebar {
        width: 350px;
        min-width: 350px;
    }
    
    .about-content {
        margin-left: 350px;
        width: calc(100% - 350px);
        padding: 2rem 3rem;
    }
}

@media (max-width: 900px) {
    .about-hero {
        flex-direction: column;
        min-height: auto;
    }
    
    .profile-sidebar {
        position: static;
        width: 100%;
        min-width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding: 2rem;
    }
    
    .about-content {
        margin-left: 0;
        width: 100%;
        padding: 2rem;
    }
    
    .about-content .card {
        max-width: 100%;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .header {
        padding: 0 1rem;
    }
    
    .header-content {
        flex-direction: column;
        height: auto;
        padding: 1rem 0;
        gap: 1rem;
    }
    
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav-link {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
    }
    
    .main-container {
        padding-top: 140px;
    }
    
    .section:not(:has(.about-hero)) {
        padding: 1rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }

    .blog-fullpage {
        padding: 1rem !important;
    }

    .blog-full-title {
        font-size: 1.5rem;
    }

    .blog-full-body {
        font-size: 0.95rem;
    }

    .blog-pdf-viewer {
        height: calc(100vh - 260px);
        min-height: 350px;
    }
    
    .profile-image {
        width: 140px;
        height: 140px;
        font-size: 3rem;
    }
    
    .profile-sidebar {
        padding: 1.5rem;
    }
    
    .about-content {
        padding: 1.5rem;
    }
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-dark);
}