:root {
    --bg-color: #0a0a0f;
    --primary-text-color: #e0e0e0;
    --secondary-text-color: #a0a0a0;
    --accent-color: #00ffff;
    --accent-hover-color: #00dddd;
    --card-bg-color: #1a1a2e;
    --border-color: #333344;
    --glow-color: rgba(0, 255, 255, 0.25);
    --font-primary: 'Inter', sans-serif;
    --font-mono: 'Roboto Mono', monospace;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-primary);
    background-color: var(--bg-color);
    color: var(--primary-text-color);
    line-height: 1.6;
    cursor: none;
    overflow-x: hidden;
}

/* Preloader Styles */
.preloader {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background-color: var(--bg-color);
    display: flex; flex-direction: column; justify-content: center; align-items: center;
    z-index: 10000; opacity: 1; transition: opacity 0.5s ease-out;
}
.loader-text {
    font-family: var(--font-mono); color: var(--accent-color);
    margin-bottom: 20px; font-size: 1.2em;
}
.loader-bar-container {
    width: 200px; height: 5px; background-color: var(--border-color);
    border-radius: 3px; overflow: hidden;
}
.loader-bar {
    width: 0%; height: 100%; background-color: var(--accent-color); border-radius: 3px;
}

/* Real-time Custom Cursor */
.custom-cursor {
    position: fixed; width: 10px; height: 10px; background-color: var(--accent-color);
    border-radius: 50%; pointer-events: none; transform: translate(-50%, -50%);
    z-index: 9999; opacity: 0.8;
    transition: width 0.2s ease, height 0.2s ease, background-color 0.2s ease, opacity 0.2s ease, border-radius 0.2s ease, border 0.2s ease;
}
.custom-cursor.pointer-hover { width: 35px; height: 35px; background-color: rgba(0,255,255,0.15); border: 2px solid var(--accent-color); }
.custom-cursor.text-input-hover { width: 3px; height: 25px; background-color: var(--accent-color); border-radius: 1px; border: none; }
.custom-cursor.clicking { transform: translate(-50%, -50%) scale(0.8); opacity: 1; }

/* Site Structure & Header */
.site-header {
    position: fixed; top: 0; left: 0; width: 100%;
    padding: 15px 40px; display: flex; justify-content: space-between; align-items: center;
    z-index: 1000; background-color: rgba(10,10,15,0.9); backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    opacity: 0; transform: translateY(-100%); will-change: transform, opacity;
}
.logo { font-family:var(--font-mono); font-size:1.5em; color:var(--accent-color); font-weight:700; transition:text-shadow 0.3s ease; }
.logo:hover { text-shadow: 0 0 10px var(--accent-color); }
/* Theme toggle in header */
.site-header #theme-toggle { background:transparent; border:1px solid var(--border-color); color:var(--accent-color); padding:6px 10px; border-radius:6px; cursor:pointer; font-family:var(--font-mono); margin-right:12px; }
.site-header #theme-toggle:hover { box-shadow:0 0 10px rgba(0,255,255,0.06); background:rgba(0,0,0,0.12); }
.site-header nav.main-nav a {
    color:var(--primary-text-color); text-decoration:none; margin-left:25px; font-size:0.9em;
    transition:color 0.3s ease, text-shadow 0.3s ease; font-family:var(--font-mono); position:relative; padding-bottom:3px;
}
.site-header nav.main-nav a::after {
    content:''; position:absolute; left:0; bottom:0; width:100%; height:1px; background-color:var(--accent-color);
    transform:scaleX(0); transform-origin:right; transition:transform 0.3s ease-out;
}
.site-header nav.main-nav a:hover::after,
.site-header nav.main-nav a.active-nav-link::after {
    transform:scaleX(1); transform-origin:left;
}
.site-header nav.main-nav a:hover,
.site-header nav.main-nav a.active-nav-link {
    color:var(--accent-color);
    text-shadow: 0 0 3px var(--accent-color);
}

/* Page Content Wrapper & Section Visibility */
#page-content-wrapper {
    padding-top: 70px; /* Header height, adjust if header changes */
    position: relative;
    min-height: calc(100vh - 70px);
}
.page-section {
    padding: 60px 20px;
    min-height: calc(100vh - 70px - 60px); /* header - footer approx */
    display: none; /* Hidden by default, JS adds .active-section */
    opacity: 0;    /* Hidden by default for GSAP animation */
    background-color: transparent; /* make transparent so background canvas is visible */
    position: relative;
    z-index: 1;
    /* animation: fadeInSection 0.6s forwards ease-out; GSAP handles fade in */
}
.page-section.active-section {
    display: block; /* Default for content sections */
    z-index: 2;
}
/* Hero Section Specific Display */
#hero.page-section {
    padding: 20px;
    justify-content: center;
    align-items: center;
    text-align: center;
    min-height: calc(100vh - 70px);
    overflow: hidden;
}
#hero.page-section.active-section {
    display: flex; /* Hero needs flex for its content centering */
}

.hero-content { z-index:2; position:relative; }
.hero-title { font-size:clamp(2.2rem,7vw,4rem); font-family:var(--font-mono); color:var(--primary-text-color); margin-bottom:20px; font-weight:700; letter-spacing:-2px; line-height:1.2; }
.hero-title .char { display:inline-block; opacity:0; transform:translateY(20px) scale(.8) rotateX(-45deg); filter:blur(3px); will-change:transform,opacity,filter; }
.hero-subtitle { font-size:clamp(1rem,3vw,1.4rem); color:var(--secondary-text-color); font-weight:300; opacity: 0; transform: translateY(15px); }
#plexus-canvas { position:absolute; top:0; left:0; width:100%; height:100%; z-index:1; }

/* ASCII Terminal Styles */
.ascii-terminal-container {
    margin-top: 30px;
    width: 100%;
    max-width: 420px;
    padding: 15px 20px;
    background-color: rgba(10, 20, 30, 0.75);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.08);
    font-family: var(--font-mono);
    font-size: 0.85em;
    line-height: 1.45;
    opacity: 0;
    transform: translateY(15px);
    will-change: opacity, transform;
    min-height: 80px;
    box-sizing: border-box;
    text-align: left;
}
#ascii-terminal-output {
    margin: 0; padding: 0; white-space: pre-wrap; word-break: break-all;
    color: var(--accent-color); display: inline;
}
#ascii-terminal-output::after {
    content: '_'; opacity: 1; animation: blinkCursor 1s step-end infinite;
    margin-left: 1px; font-weight: bold;
}
@keyframes blinkCursor { 50% { opacity: 0; } }


.container { max-width:900px; margin:0 auto; }
.content-section h2 {
    font-family:var(--font-mono); font-size:2.3em; color:var(--accent-color);
    margin-bottom:30px; position:relative; padding-bottom:10px; display:inline-block;
}
.content-section h2::before { content:'[ '; color:var(--accent-color); opacity:.6; font-weight:normal; margin-right:5px; }
.content-section h2::after { content:''; position:absolute; left:0; bottom:0; width:calc(100% + 10px); height:2px; background-color:var(--accent-color); opacity:.7; }

/* About Section Specific */
.about-layout { display:flex; gap:40px; align-items:flex-start; }
.about-text-content { flex:2; }
.about-text-content p { margin-bottom:1.2em; color:var(--secondary-text-color); line-height:1.7; color:var(--primary-text-color); }
.about-text-content p:first-of-type { color:var(--primary-text-color); font-size:1.05em; }
.about-image-container { flex:1; text-align:center; padding-top:20px; }
#about-me-image { width:100%; max-width:280px; height:auto; border-radius:8px; border:2px solid var(--border-color); box-shadow:0 5px 15px rgba(0,0,0,.2); }
.image-caption { font-family:var(--font-mono); font-size:.85em; color:var(--secondary-text-color); margin-top:10px; font-style:italic; }

/* Skills Section */
.skills-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(270px,1fr)); gap:25px; }
.skill-card { background-color:var(--card-bg-color); padding:20px; border-radius:6px; border:1px solid var(--border-color); transition:transform .3s ease,box-shadow .3s ease; will-change:transform,box-shadow; position:relative; overflow:visible; }
.skill-card:hover { transform:translateY(-5px) scale(1.01); box-shadow:0 0 20px -5px var(--glow-color),0 6px 15px rgba(0,0,0,.2); }
.skill-card::after { content: attr(data-level) '%'; position:absolute; right:12px; top:12px; font-family:var(--font-mono); color:var(--secondary-text-color); font-size:.85em; }
.skill-card h3 { color:var(--primary-text-color); font-family:var(--font-primary); font-size:1.3em; margin-bottom:8px; }
.skill-card p { color:var(--secondary-text-color); font-size:.9em; margin-bottom:8px; }
.skill-card .skill-bar { position:relative; height:8px; background:linear-gradient(90deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01)); border-radius:6px; margin-top:6px; overflow:hidden; border:1px solid rgba(255,255,255,0.02); }
.skill-card .skill-bar .skill-fill { position:absolute; left:0; top:0; bottom:0; width:0%; background: linear-gradient(90deg, var(--accent-color), var(--accent-hover-color)); box-shadow:0 6px 18px rgba(0,255,255,0.06); border-radius:6px; }

/* Projects Section */
.projects-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(300px,1fr)); gap:30px; }
.project-card { background-color:var(--card-bg-color); border-radius:8px; border:1px solid var(--border-color); overflow:hidden; display:flex; flex-direction:column; transition:transform .3s ease,box-shadow .3s ease; }
.project-card-link-wrapper { text-decoration:none; color:inherit; display:flex; flex-direction:column; height:100%; }
.project-card:hover { transform:translateY(-7px) scale(1.01); box-shadow:0 0 30px -7px var(--glow-color),0 8px 20px rgba(0,0,0,.25); }
.project-card.tilt { transform: perspective(800px) rotateX(0) rotateY(0) translateZ(0); transition:transform .15s ease; }
.project-card .project-card-content { transition:transform .15s ease; }
.project-card-image-container { width:100%; padding-top:58%; position:relative; background-color:#252530; overflow:hidden; }
.project-card-image-container img { position:absolute; top:0; left:0; width:100%; height:100%; object-fit:cover; transition:transform .35s ease; }
.project-card:hover .project-card-image-container img { transform:scale(1.05); }
.project-card-content { padding:20px; display:flex; flex-direction:column; flex-grow:1; }
.project-card-content h3 { color:var(--primary-text-color); font-family:var(--font-primary); font-size:1.25em; margin-bottom:8px; line-height:1.3; }
.project-tags { margin-bottom:10px; display:flex; flex-wrap:wrap; gap:6px; }
.project-tags span { font-family:var(--font-mono); font-size:.7em; color:var(--accent-color); background-color:rgba(0,255,255,.08); padding:3px 7px; border-radius:3px; border:1px solid rgba(0,255,255,.15); }
.project-excerpt { color:var(--secondary-text-color); font-size:.88em; line-height:1.5; margin-bottom:12px; flex-grow:1; }
.project-cta { color:var(--accent-color); text-decoration:none; font-weight:500; font-family:var(--font-mono); font-size:.85em; align-self:flex-start; margin-top:auto; padding:5px 0; transition:letter-spacing .3s ease,color .3s ease; }
.project-card:hover .project-cta { letter-spacing:.5px; color:var(--accent-hover-color); }

/* Blog Section */
.blog-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(300px,1fr)); gap:30px; }
.blog-post-card { background-color:var(--card-bg-color); border-radius:8px; border:1px solid var(--border-color); overflow:hidden; transition:transform .3s ease,box-shadow .3s ease; display:flex; flex-direction:column; }
.blog-post-link { text-decoration:none; color:inherit; display:flex; flex-direction:column; height:100%; }
.blog-post-card:hover { transform:translateY(-7px) scale(1.01); box-shadow:0 0 30px -7px var(--glow-color),0 8px 20px rgba(0,0,0,.25); }
.blog-post-image-container { width:100%; padding-top:56.25%; position:relative; background-color:#252530; overflow:hidden; }
.blog-post-image-container img { position:absolute; top:0; left:0; width:100%; height:100%; object-fit:cover; transition:transform .35s ease; }
.blog-post-card:hover .blog-post-image-container img { transform:scale(1.05); }
.blog-post-content { padding:20px; display:flex; flex-direction:column; flex-grow:1; }
.blog-post-meta { font-family:var(--font-mono); font-size:.75em; color:var(--secondary-text-color); margin-bottom:8px; }
.blog-post-meta span { color:var(--accent-color); }
.blog-post-content h3 { font-size:1.2em; color:var(--primary-text-color); margin-bottom:10px; line-height:1.35; }
.blog-post-excerpt { font-size:.88em; color:var(--secondary-text-color); line-height:1.55; margin-bottom:12px; flex-grow:1; }
.blog-post-cta { font-family:var(--font-mono); color:var(--accent-color); font-size:.85em; text-decoration:none; align-self:flex-start; margin-top:auto; transition:letter-spacing .3s ease; }
.blog-post-card:hover .blog-post-cta { letter-spacing:.5px; }

/* Contact Section */
.contact-form { display:flex; flex-direction:column; gap:18px; margin-bottom:25px; }
.contact-form input, .contact-form textarea { background-color:var(--card-bg-color); border:1px solid var(--border-color); color:var(--primary-text-color); padding:12px 15px; border-radius:5px; font-family:var(--font-primary); font-size:.95em; transition:border-color .3s ease,box-shadow .3s ease; }
.contact-form input:focus, .contact-form textarea:focus { outline:none; border-color:var(--accent-color); box-shadow:0 0 8px var(--glow-color); }
.contact-form input::placeholder, .contact-form textarea::placeholder { color:var(--secondary-text-color); font-family:var(--font-mono); }
.btn-primary { background-color:var(--accent-color); color:var(--bg-color); border:none; padding:12px 18px; border-radius:5px; font-family:var(--font-mono); font-weight:700; cursor:pointer; font-size:.95em; transition:background-color .3s ease,box-shadow .3s ease,transform .2s ease; }
.btn-primary:hover { background-color:var(--accent-hover-color); box-shadow:0 0 12px var(--glow-color); transform:translateY(-2px); }
.btn-primary:active { transform:translateY(0px); }
.form-status-message { margin-top:15px; text-align:center; font-family:var(--font-mono); font-size:.85em; min-height:1.2em; }
.form-status-message.success { color:var(--accent-color); }
.form-status-message.error { color:#ff6b6b; }
.social-links { text-align:center; margin-top:30px; }
.social-links a { color:var(--secondary-text-color); text-decoration:none; margin:0 12px; transition:color .3s ease,text-shadow .3s ease; font-size:0.9em; }
.social-links a:hover { color:var(--accent-color); text-shadow:0 0 8px var(--accent-color); }

/* Footer */
.site-footer-bottom { text-align:center; padding:25px 20px; font-size:.85em; color:var(--secondary-text-color); border-top:1px solid var(--border-color); font-family:var(--font-mono); position:relative; z-index:1; background-color:var(--bg-color); }

/* Project Modal / Lightbox */
.project-modal { position:fixed; inset:0; display:flex; justify-content:center; align-items:center; background:rgba(0,0,0,0.75); z-index:20000; opacity:0; pointer-events:none; transition:opacity .25s ease; }
.project-modal.open { opacity:1; pointer-events:auto; }
.project-modal .modal-card { background:var(--card-bg-color); border:1px solid var(--border-color); padding:18px; border-radius:8px; max-width:900px; width:94%; max-height:82vh; overflow:auto; box-shadow:0 10px 40px rgba(0,0,0,.6); }
.project-modal .modal-close { background:transparent; border:0; color:var(--secondary-text-color); font-size:1.1em; cursor:pointer; float:right; }

/* Back to top */
.back-to-top { position:fixed; right:18px; bottom:18px; background:var(--accent-color); color:var(--bg-color); padding:10px 12px; border-radius:8px; box-shadow:0 8px 24px rgba(0,255,255,0.07); z-index:15000; display:none; cursor:pointer; font-family:var(--font-mono); border:none; }
.back-to-top.show { display:block; }

/* Light/Dark theme variations */
body.theme-light {
    --bg-color: #f8f9fa;
    --primary-text-color: #1a1a2e;
    --secondary-text-color: #495057;
    --card-bg-color: #ffffff;
    --border-color: #dee2e6;
    --accent-color: #0066cc;
    --accent-hover-color: #0052a3;
    --glow-color: rgba(0, 102, 204, 0.15);
}

body.theme-light .matrix-canvas {
    opacity: 0.04;
    filter: brightness(0.6);
}

body.theme-light .site-header {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

body.theme-light .project-card,
body.theme-light .skill-card,
body.theme-light .blog-post-card,
body.theme-light .challenge-card,
body.theme-light .ctf-redirect-box {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

body.theme-light .project-card:hover,
body.theme-light .skill-card:hover,
body.theme-light .blog-post-card:hover {
    box-shadow: 0 4px 16px rgba(0, 102, 204, 0.12);
}

body.theme-light .back-to-top {
    background: var(--accent-color);
    box-shadow: 0 4px 12px rgba(0, 102, 204, 0.25);
}

body.theme-light .preloader {
    background-color: #f8f9fa;
}

body.theme-light .ascii-terminal-container {
    background-color: rgba(240, 245, 250, 0.9);
    border-color: var(--border-color);
}

body.theme-light #plexus-canvas {
    opacity: 0.15;
    filter: brightness(0.7);
}

/* CTF Redirect Box Styles */
.ctf-redirect-box {
    background: var(--card-bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 48px 32px;
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.ctf-icon {
    font-size: 4em;
    margin-bottom: 20px;
    animation: float 3s ease-in-out infinite;
}

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

.ctf-redirect-box h3 {
    font-family: var(--font-mono);
    color: var(--accent-color);
    font-size: 1.8em;
    margin-bottom: 16px;
}

.ctf-redirect-box p {
    color: var(--primary-text-color);
    line-height: 1.7;
    margin-bottom: 20px;
}

.ctf-features {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    margin: 24px 0;
}

.ctf-features span {
    font-family: var(--font-mono);
    font-size: 0.85em;
    color: var(--accent-color);
    background: rgba(0, 255, 255, 0.05);
    padding: 6px 14px;
    border-radius: 6px;
    border: 1px solid rgba(0, 255, 255, 0.15);
}

body.theme-light .ctf-features span {
    background: rgba(0, 102, 204, 0.08);
    border-color: rgba(0, 102, 204, 0.2);
}

.btn-ctf {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-hover-color));
    color: var(--bg-color);
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1em;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 255, 255, 0.3);
    margin-top: 12px;
}

.btn-ctf:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(0, 255, 255, 0.4);
}

body.theme-light .btn-ctf {
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(0, 102, 204, 0.25);
}

body.theme-light .btn-ctf:hover {
    box-shadow: 0 6px 25px rgba(0, 102, 204, 0.35);
}

.ctf-note {
    margin-top: 20px;
    font-size: 0.85em;
    color: var(--secondary-text-color);
    font-style: italic;
}

/* Matrix / falling binary background canvas */
.matrix-canvas { position:fixed; inset:0; z-index:0; pointer-events:none; opacity:0.28; mix-blend-mode:screen; }

/* Ensure all UI sits above the matrix canvas */
.site-wrapper { position:relative; z-index:5; }

/* Responsive Adjustments */
@media (max-width:768px) {
    body { cursor:auto; }
    .custom-cursor { display:none!important; }
    .site-header { padding:15px 20px; flex-direction:column; gap:10px; }
    .site-header nav.main-nav { display:flex; gap:10px; justify-content:center; width:100%; flex-wrap:wrap; }
    .site-header nav.main-nav a { margin-left:0; font-size:.8em; padding:4px 6px; }
    #page-content-wrapper { padding-top:110px; }
    .page-section, #hero.full-screen-section { min-height:calc(100vh - 110px - 50px); padding: 40px 15px; }
    .content-section h2 { font-size:1.8em; margin-bottom: 25px; }
    .hero-title { font-size:clamp(1.6rem,8vw,2.2rem); }
    .hero-subtitle { font-size: clamp(0.9rem, 2.5vw, 1.1rem); }
    .about-layout { flex-direction:column; }
    .about-image-container { order:-1; margin-bottom:25px; max-width:180px; align-self:center; }
    .projects-grid, .blog-grid, .skills-grid { grid-template-columns:1fr; gap: 20px; }
    .skill-card, .project-card, .blog-post-card { padding: 15px; }
    .project-card-content h3, .blog-post-content h3, .skill-card h3 { font-size: 1.1em; }
    .project-excerpt, .blog-post-excerpt, .skill-card p { font-size: 0.85em; }
    .ascii-terminal-container { max-width: 90%; font-size: 0.75em; padding: 10px; min-height: 60px; margin-top: 20px;}
    .ctf-redirect-box { padding: 32px 20px; }
    .ctf-icon { font-size: 3em; }
    .ctf-redirect-box h3 { font-size: 1.4em; }
    .ctf-features { flex-direction: column; align-items: center; }
}

/* Experience Highlights in About Section */
.experience-highlights {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.experience-highlights h3 {
    font-family: var(--font-mono);
    color: var(--accent-color);
    font-size: 1.1em;
    margin-bottom: 16px;
}

.experience-item {
    background: var(--card-bg-color);
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 12px;
    border-left: 3px solid var(--accent-color);
}

.experience-item .exp-title {
    font-weight: 600;
    color: var(--primary-text-color);
}

.experience-item .exp-company {
    color: var(--accent-color);
    font-family: var(--font-mono);
}

.experience-item .exp-date {
    display: block;
    font-size: 0.85em;
    color: var(--secondary-text-color);
    font-family: var(--font-mono);
    margin: 4px 0 8px;
}

.experience-item p {
    font-size: 0.9em;
    color: var(--secondary-text-color);
    margin: 0;
}

/* Certification Badges */
.certifications-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin-top: 16px;
}

.cert-badge {
    background: linear-gradient(135deg, var(--accent-color), var(--accent-hover-color));
    color: var(--bg-color);
    font-family: var(--font-mono);
    font-size: 0.75em;
    font-weight: 700;
    padding: 6px 12px;
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 255, 255, 0.2);
}

body.theme-light .cert-badge {
    box-shadow: 0 2px 8px rgba(0, 102, 204, 0.2);
}

/* Tools Section */
.tools-section {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.tools-section h3 {
    font-family: var(--font-mono);
    color: var(--accent-color);
    font-size: 1.3em;
    margin-bottom: 20px;
}

.tools-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.tool-tag {
    background: var(--card-bg-color);
    color: var(--primary-text-color);
    font-family: var(--font-mono);
    font-size: 0.85em;
    padding: 8px 16px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.tool-tag:hover {
    border-color: var(--accent-color);
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.15);
    transform: translateY(-2px);
}

/* Contact Info */
.contact-info {
    text-align: center;
    margin-top: 16px;
    font-family: var(--font-mono);
    font-size: 0.9em;
    color: var(--secondary-text-color);
}

/* Resume Download Button */
.resume-download-section {
    margin-top: 30px;
    padding-top: 20px;
}

.btn-download-resume {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-hover-color));
    color: var(--bg-color);
    padding: 14px 28px;
    border-radius: 8px;
    text-decoration: none;
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.95em;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 255, 255, 0.25);
}

.btn-download-resume:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(0, 255, 255, 0.4);
}

.download-icon {
    font-size: 1.3em;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

body.theme-light .btn-download-resume {
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(0, 102, 204, 0.25);
}

body.theme-light .btn-download-resume:hover {
    box-shadow: 0 6px 25px rgba(0, 102, 204, 0.35);
}

/* Certifications Section */
.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.cert-card {
    background: var(--card-bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px 24px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.cert-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color), var(--accent-hover-color));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.cert-card:hover::before {
    transform: scaleX(1);
}

.cert-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(0, 255, 255, 0.15);
    border-color: var(--accent-color);
}

.cert-icon {
    font-size: 3.5em;
    margin-bottom: 16px;
    filter: grayscale(0.3);
    transition: all 0.3s ease;
}

.cert-card:hover .cert-icon {
    filter: grayscale(0);
    transform: scale(1.1) rotate(5deg);
}

.cert-card h3 {
    color: var(--primary-text-color);
    font-size: 1.2em;
    margin-bottom: 12px;
    font-family: var(--font-primary);
    line-height: 1.3;
}

.cert-issuer {
    color: var(--accent-color);
    font-family: var(--font-mono);
    font-size: 0.9em;
    margin-bottom: 8px;
}

.cert-code {
    display: inline-block;
    background: rgba(0, 255, 255, 0.1);
    color: var(--accent-color);
    padding: 6px 16px;
    border-radius: 20px;
    font-family: var(--font-mono);
    font-size: 0.85em;
    font-weight: 700;
    margin: 12px 0;
    border: 1px solid rgba(0, 255, 255, 0.2);
}

.cert-skills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin-top: 16px;
}

.cert-skills span {
    background: var(--bg-color);
    color: var(--secondary-text-color);
    padding: 5px 12px;
    border-radius: 4px;
    font-size: 0.75em;
    font-family: var(--font-mono);
    border: 1px solid var(--border-color);
}

/* Statistics Section */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.stat-card {
    background: var(--card-bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 40px 20px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.stat-card::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 255, 255, 0.1), transparent);
    transform: translate(-50%, -50%);
    transition: width 0.5s ease, height 0.5s ease;
}

.stat-card:hover::after {
    width: 300px;
    height: 300px;
}

.stat-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 10px 30px rgba(0, 255, 255, 0.2);
    border-color: var(--accent-color);
}

.stat-icon {
    font-size: 3em;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.stat-number {
    font-size: 3em;
    font-weight: 700;
    color: var(--accent-color);
    font-family: var(--font-mono);
    margin-bottom: 8px;
    position: relative;
    z-index: 1;
}

.stat-label {
    color: var(--secondary-text-color);
    font-size: 0.95em;
    font-family: var(--font-primary);
    position: relative;
    z-index: 1;
}

/* Timeline Section */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 40px auto 0;
    padding: 20px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, 
        transparent,
        var(--accent-color) 10%,
        var(--accent-color) 90%,
        transparent
    );
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 50px;
    width: calc(50% - 40px);
}

.timeline-item:nth-child(odd) {
    margin-left: 0;
    text-align: right;
    padding-right: 40px;
}

.timeline-item:nth-child(even) {
    margin-left: calc(50% + 40px);
    text-align: left;
    padding-left: 40px;
}

.timeline-marker {
    position: absolute;
    top: 0;
    width: 20px;
    height: 20px;
    background: var(--accent-color);
    border: 4px solid var(--bg-color);
    border-radius: 50%;
    box-shadow: 0 0 0 4px var(--border-color), 0 0 20px rgba(0, 255, 255, 0.5);
    z-index: 2;
    transition: all 0.3s ease;
}

.timeline-item:nth-child(odd) .timeline-marker {
    right: -50px;
}

.timeline-item:nth-child(even) .timeline-marker {
    left: -50px;
}

.timeline-item:hover .timeline-marker {
    transform: scale(1.3);
    box-shadow: 0 0 0 6px var(--border-color), 0 0 30px rgba(0, 255, 255, 0.8);
}

.timeline-content {
    background: var(--card-bg-color);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 24px;
    transition: all 0.3s ease;
}

.timeline-item:hover .timeline-content {
    transform: scale(1.02);
    box-shadow: 0 8px 25px rgba(0, 255, 255, 0.15);
    border-color: var(--accent-color);
}

.timeline-date {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-hover-color));
    color: var(--bg-color);
    padding: 6px 14px;
    border-radius: 20px;
    font-family: var(--font-mono);
    font-size: 0.8em;
    font-weight: 700;
    margin-bottom: 12px;
}

.timeline-content h3 {
    color: var(--primary-text-color);
    font-size: 1.3em;
    margin-bottom: 8px;
    font-family: var(--font-primary);
}

.timeline-org {
    color: var(--accent-color);
    font-family: var(--font-mono);
    font-size: 0.9em;
    margin-bottom: 12px;
}

.timeline-content p {
    color: var(--secondary-text-color);
    line-height: 1.6;
    font-size: 0.9em;
}

/* Responsive Timeline */
@media (max-width: 768px) {
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item,
    .timeline-item:nth-child(odd),
    .timeline-item:nth-child(even) {
        width: 100%;
        margin-left: 0;
        text-align: left;
        padding-left: 60px;
        padding-right: 0;
    }
    
    .timeline-marker,
    .timeline-item:nth-child(odd) .timeline-marker,
    .timeline-item:nth-child(even) .timeline-marker {
        left: 10px;
        right: auto;
    }
    
    .certifications-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .stat-card {
        padding: 30px 15px;
    }
    
    .stat-number {
        font-size: 2.2em;
    }
    
    .stat-icon {
        font-size: 2.5em;
    }
}


/* Responsive for new sections */
@media (max-width: 768px) {
    .experience-item {
        padding: 12px;
    }
    
    .certifications-badges {
        gap: 6px;
    }
    
    .cert-badge {
        font-size: 0.7em;
        padding: 5px 10px;
    }
    
    .tools-section {
        margin-top: 30px;
        padding-top: 20px;
    }
    
    .tool-tag {
        font-size: 0.8em;
        padding: 6px 12px;
    }
}