/* ============================================================
   CSS Variables & Reset
============================================================ */
:root {
    --bg-primary:    #07070f;
    --bg-secondary:  #0d0d1a;
    --bg-card:       #111122;
    --accent-1:      #7c3aed;
    --accent-2:      #06b6d4;
    --accent-grad:   linear-gradient(135deg, #7c3aed 0%, #06b6d4 100%);
    --text-primary:  #f1f5f9;
    --text-secondary:#94a3b8;
    --text-muted:    #64748b;
    --border:        rgba(124,58,237,.18);
    --border-hover:  rgba(124,58,237,.45);
    --shadow-xl:     0 24px 64px rgba(0,0,0,.55);
    --shadow-accent: 0 0 40px rgba(124,58,237,.28);
    --radius:        18px;
    --radius-sm:     10px;
    --font:          'Poppins', sans-serif;
    --ease:          cubic-bezier(.16,1,.3,1);
    --dur:           .35s;
}

*,*::before,*::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow-x: hidden;
    line-height: 1.7;
}
a { text-decoration:none; color:inherit; }
img { display:block; max-width:100%; }

/* ============================================================
   Utility
============================================================ */
.gradient-text {
    background: var(--accent-grad);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.btn {
    display: inline-flex;
    align-items: center;
    padding: 14px 34px;
    border-radius: 50px;
    font: 600 15px/1 var(--font);
    cursor: pointer;
    border: none;
    transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), background var(--dur);
}
.btn-primary {
    background: var(--accent-grad);
    color: #fff;
    box-shadow: 0 6px 24px rgba(124,58,237,.45);
}
.btn-primary:hover  { transform: translateY(-4px); box-shadow: 0 12px 36px rgba(124,58,237,.6); }
.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid rgba(124,58,237,.45);
}
.btn-outline:hover { background: rgba(124,58,237,.1); border-color: var(--accent-1); transform: translateY(-4px); }
.btn-full { width:100%; justify-content:center; }

.section-container { max-width:1200px; margin:0 auto; padding:110px 6%; }

.section-header { text-align:center; margin-bottom:72px; }

.section-tag {
    display: inline-block;
    background: rgba(6,182,212,.1);
    color: var(--accent-2);
    border: 1px solid rgba(6,182,212,.3);
    padding: 5px 20px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 14px;
}
.section-title { font-size: clamp(34px,5vw,52px); font-weight:700; }

/* ============================================================
   Scroll Reveal
============================================================ */
.reveal,.reveal-left,.reveal-right {
    opacity: 0;
    transition: opacity .8s var(--ease), transform .8s var(--ease);
}
.reveal       { transform: translateY(48px); }
.reveal-left  { transform: translateX(-48px); }
.reveal-right { transform: translateX(48px); }
.reveal.visible,.reveal-left.visible,.reveal-right.visible {
    opacity: 1; transform: none;
}

/* ============================================================
   Navbar
============================================================ */
#navbar {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 9999;
    padding: 22px 6%;
    transition: padding var(--dur), background var(--dur), box-shadow var(--dur);
}
#navbar.scrolled {
    background: rgba(7,7,15,.88);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--border);
    padding: 14px 6%;
    box-shadow: 0 4px 32px rgba(0,0,0,.4);
}
.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav-logo img { height: 44px; }
.nav-links { display:flex; list-style:none; gap:44px; }
.nav-link {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    position: relative;
    transition: color var(--dur);
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px; left: 0;
    width: 0; height: 2px;
    background: var(--accent-grad);
    border-radius: 2px;
    transition: width .4s var(--ease);
}
.nav-link:hover,.nav-link.active { color: var(--text-primary); }
.nav-link:hover::after,.nav-link.active::after { width:100%; }
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none; border: none;
    cursor: pointer; padding: 4px;
}
.nav-toggle span {
    display: block; width:24px; height:2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: transform var(--dur), opacity var(--dur);
}
.nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.nav-toggle.open span:nth-child(2) { opacity:0; }
.nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* ============================================================
   Hero
============================================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: var(--bg-primary);
}
#particles { position:absolute; inset:0; z-index:0; pointer-events:none; }

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 130px 6% 80px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
}

/* Text side */
.hero-text { flex:1; max-width:600px; }

.hero-greeting {
    font-size: 16px;
    letter-spacing: 3px;
    color: var(--text-muted);
    font-weight: 400;
    margin-bottom: 10px;
    opacity: 0;
    animation: fadeUp .7s var(--ease) .2s forwards;
}
.hero-name {
    font-size: clamp(44px,6.5vw,76px);
    font-weight: 800;
    line-height: 1.08;
    margin-bottom: 18px;
    opacity: 0;
    animation: fadeUp .7s var(--ease) .4s forwards;
}
.hero-surname { display:block; color: var(--text-primary); }

.hero-role {
    font-size: clamp(20px,2.8vw,28px);
    font-weight: 500;
    color: var(--text-secondary);
    min-height: 42px;
    margin-bottom: 26px;
    opacity: 0;
    animation: fadeUp .7s var(--ease) .6s forwards;
}
.typed-text { color: var(--accent-2); font-weight:600; }
.cursor {
    display: inline-block;
    color: var(--accent-1);
    animation: blink 1s step-end infinite;
    margin-left: 1px;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

.hero-bio {
    font-size: 15.5px;
    color: var(--text-secondary);
    max-width: 500px;
    margin-bottom: 42px;
    line-height: 1.85;
    opacity: 0;
    animation: fadeUp .7s var(--ease) .8s forwards;
}
.hero-cta {
    display: flex; gap:16px; flex-wrap:wrap;
    margin-bottom: 44px;
    opacity: 0;
    animation: fadeUp .7s var(--ease) 1s forwards;
}
.hero-social {
    display: flex; gap:14px;
    opacity: 0;
    animation: fadeUp .7s var(--ease) 1.15s forwards;
}
.social-icon {
    width:44px; height:44px; border-radius:50%;
    border: 1px solid var(--border);
    background: rgba(124,58,237,.06);
    display: flex; align-items:center; justify-content:center;
    color: var(--text-secondary); font-size:16px;
    transition: all .35s var(--ease);
}
.social-icon:hover {
    background: var(--accent-grad);
    border-color: transparent;
    color: #fff;
    transform: translateY(-4px);
    box-shadow: 0 10px 24px rgba(124,58,237,.45);
}

/* Image side */
.hero-image {
    flex: 0 0 auto;
    opacity: 0;
    animation: fadeRight .9s var(--ease) .4s forwards;
}
.image-wrapper {
    position: relative;
    width: 390px; height: 390px;
    display: flex; align-items:center; justify-content:center;
}
.image-ring {
    position: absolute;
    border-radius: 50%;
    border: 1px solid rgba(124,58,237,.25);
    animation: spin linear infinite;
}
.ring-1 { inset:-20px; animation-duration:18s; }
.ring-2 { inset:-40px; animation-duration:28s; animation-direction:reverse; border-color:rgba(6,182,212,.15); }
@keyframes spin { to { transform: rotate(360deg); } }
.image-blob {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: var(--accent-grad);
    opacity: .12;
    filter: blur(20px);
    animation: pulse 4s ease-in-out infinite;
}
@keyframes pulse { 0%,100%{transform:scale(1);opacity:.12} 50%{transform:scale(1.08);opacity:.22} }
.profile-img {
    width: 340px; height: 340px;
    border-radius: 50%;
    object-fit: cover;
    position: relative; z-index:2;
    border: 3px solid rgba(124,58,237,.35);
    box-shadow: 0 0 64px rgba(124,58,237,.3), var(--shadow-xl);
}

/* Scroll indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px; left:50%;
    transform: translateX(-50%);
    z-index:1;
    display: flex; flex-direction:column; align-items:center; gap:8px;
}
.scroll-label { font-size:11px; letter-spacing:3px; color: var(--text-muted); text-transform:uppercase; }
.scroll-dot {
    width:8px; height:8px; border-radius:50%;
    background: var(--accent-1);
    animation: bounce 2s ease-in-out infinite;
}
@keyframes bounce { 0%,100%{transform:translateY(0);opacity:1} 50%{transform:translateY(10px);opacity:.3} }

/* ============================================================
   About
============================================================ */
.about-section {
    background: var(--bg-secondary);
    position: relative;
}
.about-section::before {
    content:''; position:absolute; top:0; left:0; right:0; height:1px;
    background: var(--accent-grad); opacity:.25;
}
.about-content { display:flex; gap:80px; align-items:flex-start; }
.about-image-col { flex:0 0 auto; }
.about-img-wrapper { position:relative; width:300px; }
.about-img {
    width:100%; border-radius:var(--radius);
    position:relative; z-index:1;
    box-shadow: var(--shadow-xl);
}
.about-img-deco {
    position:absolute; inset:0; top:14px; left:14px;
    border:2px solid var(--accent-1);
    border-radius:var(--radius); z-index:0; opacity:.4;
}
.about-stats { display:flex; gap:14px; margin-top:20px; }
.stat-card {
    flex:1; background:var(--bg-card);
    border:1px solid var(--border);
    border-radius:var(--radius-sm);
    padding:18px 14px; text-align:center;
    transition: transform .35s var(--ease), border-color .35s, box-shadow .35s;
}
.stat-card:hover {
    transform:translateY(-6px);
    border-color: var(--accent-1);
    box-shadow: 0 0 28px rgba(124,58,237,.2);
}
.stat-number {
    display:block; font-size:34px; font-weight:800;
    background: var(--accent-grad);
    -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text;
}
.stat-label { font-size:11.5px; color:var(--text-secondary); font-weight:500; }

.about-info-col { flex:1; }
.about-desc { font-size:15.5px; color:var(--text-secondary); margin-bottom:30px; line-height:1.85; }

.about-details { display:grid; grid-template-columns:1fr 1fr; gap:14px; margin-bottom:34px; }
.detail-item { display:flex; align-items:center; gap:12px; color:var(--text-secondary); font-size:13.5px; }
.detail-item i { color:var(--accent-2); font-size:15px; width:18px; flex-shrink:0; }

/* Tabs */
.tab-group { margin-bottom:36px; }
.tab-nav {
    display:flex; gap:0;
    background: var(--bg-card);
    border:1px solid var(--border);
    border-radius:50px; padding:4px;
    width:fit-content; margin-bottom:24px;
}
.tab-btn {
    padding:9px 26px;
    background:none; border:none;
    color:var(--text-muted); font:500 13.5px var(--font);
    cursor:pointer; border-radius:50px;
    transition: background .3s, color .3s;
}
.tab-btn.active {
    background: var(--accent-grad);
    color:#fff; font-weight:600;
}
.tab-panel { display:none; }
.tab-panel.active { display:block; animation: fadeIn .35s var(--ease); }
@keyframes fadeIn { from{opacity:0;transform:translateY(10px)} to{opacity:1;transform:none} }

.skills-grid { display:flex; flex-wrap:wrap; gap:10px; }
.skill-tag {
    padding:7px 16px;
    background:rgba(124,58,237,.1);
    border:1px solid rgba(124,58,237,.22);
    border-radius:50px;
    font-size:13px; color:var(--text-secondary); font-weight:500;
    transition: all .3s var(--ease); cursor:default;
}
.skill-tag:hover { background:rgba(124,58,237,.2); border-color:var(--accent-1); color:var(--text-primary); transform:translateY(-2px); }

.timeline-list { display:flex; flex-direction:column; gap:22px; padding-left:22px; border-left:2px solid var(--border); }
.timeline-item { position:relative; padding-left:18px; }
.timeline-item::before {
    content:''; position:absolute;
    left:-27px; top:9px;
    width:10px; height:10px; border-radius:50%;
    background: var(--accent-grad);
    box-shadow: 0 0 10px rgba(124,58,237,.5);
}
.timeline-date { display:block; font-size:11.5px; color:var(--accent-2); font-weight:700; letter-spacing:.5px; margin-bottom:4px; }
.timeline-item h4 { font-size:15px; font-weight:600; color:var(--text-primary); margin-bottom:2px; }
.timeline-item p  { font-size:13px; color:var(--text-secondary); }

/* ============================================================
   Expertise / Skills Cards
============================================================ */
.expertise-section { background: var(--bg-primary); }
.expertise-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:28px; }
.expertise-card {
    background: var(--bg-card);
    border:1px solid var(--border);
    border-radius:var(--radius);
    padding:38px 30px;
    position:relative; overflow:hidden;
    transition: transform .45s var(--ease), border-color .35s, box-shadow .45s;
}
.expertise-card::before {
    content:''; position:absolute;
    top:0; left:0; right:0; height:2px;
    background: var(--accent-grad); opacity:0;
    transition: opacity .35s;
}
.expertise-card:hover {
    transform:translateY(-10px);
    border-color:var(--border-hover);
    box-shadow: 0 24px 48px rgba(0,0,0,.45), 0 0 48px rgba(124,58,237,.12);
}
.expertise-card:hover::before { opacity:1; }
.card-icon {
    width:60px; height:60px; border-radius:16px;
    background:rgba(124,58,237,.12);
    display:flex; align-items:center; justify-content:center;
    font-size:26px; color:var(--accent-1);
    margin-bottom:22px;
    transition: background .35s, color .35s, box-shadow .35s;
}
.expertise-card:hover .card-icon {
    background: var(--accent-grad); color:#fff;
    box-shadow:0 10px 24px rgba(124,58,237,.4);
}
.expertise-card h3 { font-size:18px; font-weight:600; margin-bottom:12px; }
.expertise-card p  { font-size:14px; color:var(--text-secondary); line-height:1.75; }

/* ============================================================
   Tab sub-label
============================================================ */
.tab-sub-label {
    font-size: 11px; font-weight: 700; letter-spacing: 1.5px;
    text-transform: uppercase; color: var(--text-muted);
    margin-bottom: 10px; margin-top: 4px;
}

/* ============================================================
   Certifications Section
============================================================ */
.certs-section { background: var(--bg-primary); }
.certs-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 20px; }
.cert-card {
    display: flex; align-items: center; gap: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 28px;
    transition: transform .4s var(--ease), border-color .35s, box-shadow .4s;
}
.cert-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-hover);
    box-shadow: 0 16px 40px rgba(0,0,0,.4), 0 0 30px rgba(124,58,237,.1);
}
.cert-icon {
    width: 52px; height: 52px; border-radius: 14px;
    background: rgba(124,58,237,.12); flex-shrink: 0;
    display: flex; align-items: center; justify-content: center;
    font-size: 22px; color: var(--accent-1);
    transition: background .35s, color .35s, box-shadow .35s;
}
.cert-card:hover .cert-icon {
    background: var(--accent-grad); color: #fff;
    box-shadow: 0 8px 20px rgba(124,58,237,.4);
}
.cert-info h4 { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.cert-info span { font-size: 12.5px; color: var(--text-muted); }

/* ============================================================
   Portfolio
============================================================ */
.portfolio-section { background: var(--bg-secondary); }
.portfolio-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:28px; }
.portfolio-card {
    background: var(--bg-card);
    border:1px solid var(--border);
    border-radius:var(--radius); overflow:hidden;
    transition: transform .4s var(--ease), border-color .35s, box-shadow .4s;
}
.portfolio-card:hover {
    transform:translateY(-10px);
    border-color:var(--border-hover);
    box-shadow:0 24px 48px rgba(0,0,0,.4), 0 0 40px rgba(124,58,237,.1);
}
.portfolio-img-wrap { position:relative; overflow:hidden; aspect-ratio:16/9; }
.portfolio-img-wrap img { width:100%; height:100%; object-fit:cover; transition:transform .6s var(--ease); }
.portfolio-card:hover .portfolio-img-wrap img { transform:scale(1.1); }
.portfolio-overlay {
    position:absolute; inset:0;
    background:rgba(7,7,15,.75);
    backdrop-filter:blur(4px);
    display:flex; align-items:center; justify-content:center;
    opacity:0; transition:opacity .35s;
}
.portfolio-card:hover .portfolio-overlay { opacity:1; }
.pf-links { display:flex; gap:14px; }
.pf-link {
    width:50px; height:50px; border-radius:50%;
    background: var(--accent-grad);
    display:flex; align-items:center; justify-content:center;
    color:#fff; font-size:18px;
    transform:scale(.75); opacity:0;
    transition: transform .35s var(--ease), opacity .35s, box-shadow .35s;
    transition-delay: calc(var(--i,.0) * .06s);
}
.portfolio-card:hover .pf-link { transform:scale(1); opacity:1; }
.pf-link:nth-child(1) { --i:0; }
.pf-link:nth-child(2) { --i:1; }
.pf-link:hover { transform:scale(1.15)!important; box-shadow:0 10px 24px rgba(124,58,237,.5); }
.portfolio-meta { padding:20px 24px; }
.pf-tag { font-size:11.5px; font-weight:700; letter-spacing:1px; text-transform:uppercase; color:var(--accent-2); display:block; margin-bottom:8px; }
.portfolio-meta h3 { font-size:17px; font-weight:600; }

/* ============================================================
   Contact
============================================================ */
.contact-section { background: var(--bg-primary); }
.contact-content { display:grid; grid-template-columns:1fr 1.5fr; gap:64px; align-items:start; }
.contact-info h3 { font-size:28px; font-weight:700; margin-bottom:14px; }
.contact-info > p { color:var(--text-secondary); margin-bottom:40px; line-height:1.85; }
.contact-items { display:flex; flex-direction:column; gap:26px; }
.contact-item { display:flex; align-items:center; gap:20px; }
.contact-icon {
    width:52px; height:52px; border-radius:var(--radius-sm);
    background:rgba(124,58,237,.1); border:1px solid var(--border);
    display:flex; align-items:center; justify-content:center;
    color:var(--accent-1); font-size:18px; flex-shrink:0;
    transition: background .35s, color .35s, box-shadow .35s, border-color .35s;
}
.contact-item:hover .contact-icon {
    background: var(--accent-grad); color:#fff;
    border-color:transparent; box-shadow:0 10px 24px rgba(124,58,237,.4);
}
.contact-item div span { display:block; font-size:11px; font-weight:700; letter-spacing:.8px; text-transform:uppercase; color:var(--text-muted); margin-bottom:4px; }
.contact-item div a,
.contact-item div p { font-size:14.5px; color:var(--text-secondary); font-weight:500; transition:color .3s; }
.contact-item div a:hover { color:var(--accent-2); }

.contact-form {
    background: var(--bg-card); border:1px solid var(--border);
    border-radius:var(--radius); padding:44px;
    display:flex; flex-direction:column; gap:16px;
}
.form-row { display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.contact-form input,
.contact-form textarea {
    width:100%; padding:14px 18px;
    background:var(--bg-secondary);
    border:1px solid var(--border);
    border-radius:var(--radius-sm);
    color:var(--text-primary); font:400 14px var(--font);
    outline:none; resize:none;
    transition: border-color .3s, box-shadow .3s;
}
.contact-form input::placeholder,
.contact-form textarea::placeholder { color:var(--text-muted); }
.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--accent-1);
    box-shadow: 0 0 0 3px rgba(124,58,237,.15);
}
.form-full { width:100%!important; }

/* ============================================================
   Footer
============================================================ */
.footer {
    background: var(--bg-secondary);
    border-top:1px solid var(--border);
    padding: 32px 6%;
}
.footer-inner {
    max-width:1200px; margin:0 auto;
    display:flex; align-items:center; justify-content:space-between;
}
.footer-inner p { font-size:13.5px; color:var(--text-muted); }
.footer-inner p i { color:#ef4444; }
.footer-social { display:flex; gap:18px; }
.footer-social a { color:var(--text-muted); font-size:15px; transition:color .3s, transform .3s; }
.footer-social a:hover { color:var(--accent-1); transform:translateY(-3px); }

/* ============================================================
   Keyframes
============================================================ */
@keyframes fadeUp    { from{opacity:0;transform:translateY(32px)} to{opacity:1;transform:none} }
@keyframes fadeRight { from{opacity:0;transform:translateX(40px)}  to{opacity:1;transform:none} }

/* ============================================================
   Responsive
============================================================ */
@media (max-width:1060px) {
    .about-content { flex-direction:column; gap:52px; align-items:center; }
    .about-img-wrapper { width:280px; }
    .about-details { grid-template-columns:1fr; }
    .expertise-grid { grid-template-columns:repeat(2,1fr); }
    .portfolio-grid  { grid-template-columns:repeat(2,1fr); }
    .contact-content { grid-template-columns:1fr; gap:48px; }
}
@media (max-width:860px) {
    .hero-content { flex-direction:column-reverse; text-align:center; padding-top:140px; gap:40px; }
    .hero-text { max-width:100%; }
    .hero-bio   { max-width:100%; }
    .hero-cta,.hero-social { justify-content:center; }
    .image-wrapper { width:280px; height:280px; }
    .profile-img   { width:248px; height:248px; }
}
@media (max-width:1060px) {
    .certs-grid { grid-template-columns: 1fr; }
}
@media (max-width:720px) {
    .nav-links {
        display:none;
        position:fixed; top:72px; left:0; right:0;
        background:rgba(7,7,15,.97); backdrop-filter:blur(24px);
        flex-direction:column; align-items:center;
        padding:32px 6%; gap:28px;
        border-bottom:1px solid var(--border);
    }
    .nav-links.open { display:flex; animation:fadeIn .3s var(--ease); }
    .nav-toggle { display:flex; }
    .section-container { padding:80px 5%; }
    .expertise-grid { grid-template-columns:1fr; }
    .portfolio-grid  { grid-template-columns:1fr; }
    .contact-form { padding:28px 22px; }
    .form-row { grid-template-columns:1fr; }
    .footer-inner { flex-direction:column; gap:16px; text-align:center; }
}