/* ═══════════════════════════════════════════════
   PROFESSIONAL PORTFOLIO — K. DULINA SAMPATH
   Clean · Modern · Internship-Ready
═══════════════════════════════════════════════ */

/* ───── Design Tokens ───── */
:root {
  /* Colours */
  --bg:         #0f1117;
  --bg-2:       #161923;
  --bg-3:       #1e2433;
  --surface:    rgba(255,255,255,0.04);
  --surface-hv: rgba(255,255,255,0.07);
  --border:     rgba(255,255,255,0.07);
  --border-hv:  rgba(255,255,255,0.14);

  --indigo:     #6366f1;
  --indigo-lt:  #818cf8;
  --sky:        #38bdf8;
  --emerald:    #34d399;
  --amber:      #fbbf24;
  --rose:       #fb7185;

  --text-1:     #f8fafc;
  --text-2:     #94a3b8;
  --text-3:     #64748b;

  /* Typography */
  --font:       'Inter', system-ui, sans-serif;
  --font-head:  'Sora', 'Inter', sans-serif;

  /* Spacing & layout */
  --nav-h:      68px;
  --px:         clamp(1.25rem, 5vw, 5rem);
  --container:  1200px;
  --radius:     12px;
  --radius-lg:  20px;
  --radius-xl:  28px;

  /* Motion */
  --ease:       cubic-bezier(0.4, 0, 0.2, 1);
  --t:          0.25s var(--ease);
  --t-slow:     0.45s var(--ease);
}

/* ───── Reset ───── */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{
  background:var(--bg);
  color:var(--text-1);
  font-family:var(--font);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
ul{list-style:none}
button{font-family:inherit;border:none;background:none;cursor:pointer}
input,textarea,select{font-family:inherit}
::-webkit-scrollbar{width:4px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:var(--indigo);border-radius:4px}

/* ───── Layout helpers ───── */
.container{
  max-width:var(--container);
  margin:0 auto;
  padding:0 var(--px);
}
.mt-1{margin-top:1rem}
.w-full{width:100%}

/* ───── Global background texture ───── */
body::before{
  content:'';
  position:fixed;
  top:-30%;left:60%;
  width:600px;height:600px;
  background:radial-gradient(circle,rgba(99,102,241,.12) 0%,transparent 65%);
  pointer-events:none;z-index:0;
}
body::after{
  content:'';
  position:fixed;
  bottom:-20%;left:-5%;
  width:500px;height:500px;
  background:radial-gradient(circle,rgba(56,189,248,.07) 0%,transparent 65%);
  pointer-events:none;z-index:0;
}

/* ══════════════════════════════════════
   UTILITY CLASSES
══════════════════════════════════════ */
.text-gradient{
  background:linear-gradient(135deg,var(--indigo-lt) 0%,var(--sky) 100%);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}

/* ══════════════════════════════════════
   BUTTONS
══════════════════════════════════════ */
.btn{
  display:inline-flex;align-items:center;gap:.5rem;
  padding:.65rem 1.5rem;
  font-size:.9rem;font-weight:600;
  border-radius:99px;
  transition:var(--t);
  cursor:pointer;
  white-space:nowrap;
}
.btn-primary{
  background:var(--indigo);
  color:#fff;
  box-shadow:0 0 0 0 rgba(99,102,241,0);
}
.btn-primary:hover{
  background:var(--indigo-lt);
  transform:translateY(-2px);
  box-shadow:0 8px 28px rgba(99,102,241,.4);
}
.btn-outline{
  border:1.5px solid var(--border-hv);
  color:var(--text-1);
  background:transparent;
}
.btn-outline:hover{
  border-color:var(--indigo);
  background:rgba(99,102,241,.08);
  transform:translateY(-2px);
}
.btn-ghost{
  color:var(--text-2);
  background:var(--surface);
  border:1.5px solid var(--border);
}
.btn-ghost:hover{
  background:var(--surface-hv);
  color:var(--text-1);
  transform:translateY(-2px);
}
.btn-sm{padding:.45rem 1.1rem;font-size:.83rem}

/* ══════════════════════════════════════
   HEADER / NAV
══════════════════════════════════════ */
.site-header{
  position:fixed;top:0;left:0;right:0;
  height:var(--nav-h);
  z-index:900;
  transition:background var(--t), box-shadow var(--t);
}
.site-header.scrolled{
  background:rgba(15,17,23,.92);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  box-shadow:0 1px 0 var(--border);
}
.header-inner{
  max-width:var(--container);
  margin:0 auto;
  padding:0 var(--px);
  height:100%;
  display:grid;
  grid-template-columns: 1fr auto 1fr;
  align-items:center;
}

/* Brand */
.brand{
  display:flex;align-items:center;gap:.55rem;
  font-weight:700;font-size:.95rem;
  color:var(--text-1);
  z-index:10;
}
.brand-dot{
  width:8px;height:8px;border-radius:50%;
  background:var(--indigo);
  flex-shrink:0;
}
.brand-logo{
  height:40px;width:auto;flex-shrink:0;
  display:block;
}

/* Desktop nav */
.primary-nav{
  display:flex;align-items:center;gap:.1rem;
  justify-content: center;
}
.nav-link{
  padding:.45rem .9rem;
  font-size:.875rem;font-weight:500;
  color:var(--text-2);
  border-radius:99px;
  transition:var(--t);
  position:relative;
}
.nav-link:hover,.nav-link.active{color:var(--text-1);background:var(--surface)}
.nav-link.active::after{
  content:'';
  position:absolute;bottom:4px;left:50%;transform:translateX(-50%);
  width:4px;height:4px;border-radius:50%;
  background:var(--indigo);
}

/* Header actions */
.header-actions{
  display:flex;align-items:center;gap:.75rem;
  z-index:10;
  justify-self: flex-end;
}

/* Burger */
.burger{
  display:none;flex-direction:column;gap:5px;
  padding:6px;border-radius:8px;
  transition:background var(--t);
}
.burger:hover{background:var(--surface)}
.burger span{
  display:block;width:20px;height:2px;
  background:var(--text-1);border-radius:2px;
  transition:var(--t);
}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* Mobile drawer */
.mobile-drawer{
  position:fixed;top:var(--nav-h);left:0;right:0;
  z-index:850;
  background:rgba(15,17,23,.97);
  backdrop-filter:blur(20px);
  padding:1.5rem var(--px) 2.5rem;
  border-bottom:1px solid var(--border);
  transform:translateY(-110%);
  transition:transform .35s var(--ease);
}
.mobile-drawer.open{transform:translateY(0)}
.mobile-drawer nav{display:flex;flex-direction:column;gap:.4rem}
.drawer-link{
  padding:.9rem 1rem;
  font-size:1rem;font-weight:500;
  color:var(--text-2);border-radius:var(--radius);
  transition:var(--t);
}
.drawer-link:hover{color:var(--text-1);background:var(--surface)}

.drawer-overlay{
  position:fixed;inset:0;z-index:800;
  background:rgba(0,0,0,.5);
  backdrop-filter:blur(2px);
  opacity:0;pointer-events:none;
  transition:opacity var(--t);
}
.drawer-overlay.active{opacity:1;pointer-events:all}

/* ══════════════════════════════════════
   SECTIONS — shared
══════════════════════════════════════ */
.section{
  position:relative;z-index:1;
  padding:6rem 0;
}
.section-eyebrow{
  display:inline-block;
  font-size:.78rem;font-weight:700;
  text-transform:uppercase;letter-spacing:.12em;
  color:var(--indigo-lt);
  margin-bottom:.75rem;
}
.section-heading{
  font-family:var(--font-head);
  font-size:clamp(1.9rem,3.5vw,2.75rem);
  font-weight:800;
  line-height:1.15;
  margin-bottom:1.25rem;
}
.section-desc{
  font-size:1.025rem;
  color:var(--text-2);
  max-width:52ch;
  line-height:1.75;
}
.section-intro{text-align:center;margin-bottom:3.5rem}
.section-intro .section-desc{margin:0 auto}

/* ══════════════════════════════════════
   ANIMATIONS
══════════════════════════════════════ */
@keyframes fade-up{
  from{opacity:0;transform:translateY(28px)}
  to  {opacity:1;transform:translateY(0)}
}
@keyframes fade-right{
  from{opacity:0;transform:translateX(30px)}
  to  {opacity:1;transform:translateX(0)}
}
@keyframes fade-left{
  from{opacity:0;transform:translateX(-30px)}
  to  {opacity:1;transform:translateX(0)}
}
@keyframes float{
  0%,100%{transform:translateY(0)}
  50%    {transform:translateY(-10px)}
}
@keyframes spin-slow{to{transform:rotate(360deg)}}
@keyframes pulse-ring{
  0%  {box-shadow:0 0 0 0 rgba(99,102,241,.5)}
  70% {box-shadow:0 0 0 8px rgba(99,102,241,0)}
  100%{box-shadow:0 0 0 0 rgba(99,102,241,0)}
}
@keyframes marquee{
  from{transform:translateX(0)}
  to  {transform:translateX(-50%)}
}

/* Scroll-triggered classes — visible by default, animated when .vis is added by JS */
.reveal-up   { opacity:0; transform:translateY(28px);  transition:opacity .7s var(--ease), transform .7s var(--ease); }
.reveal-left { opacity:0; transform:translateX(-28px); transition:opacity .7s var(--ease), transform .7s var(--ease); }
.reveal-right{ opacity:0; transform:translateX(28px);  transition:opacity .7s var(--ease), transform .7s var(--ease); }
/* Fallback: if JS never fires, show content anyway */
.no-js .reveal-up,.no-js .reveal-left,.no-js .reveal-right{ opacity:1; transform:none; }

.reveal-up.vis,.reveal-left.vis,.reveal-right.vis{
  opacity:1;
  transform:translate(0);
}

/* Entry animation delay via CSS custom prop on element */
.animate-up{
  animation:fade-up .65s var(--ease) var(--d,0ms) both;
}
.animate-right{
  animation:fade-right .7s var(--ease) var(--d,0ms) both;
}

/* ══════════════════════════════════════
   HERO
══════════════════════════════════════ */
.hero{
  min-height:100vh;
  display:flex;align-items:center;
  padding-top:var(--nav-h);
  position:relative;z-index:1;
}
.hero-grid{
  max-width:var(--container);
  margin:0 auto;
  padding:4rem var(--px) 6rem;
  display:grid;
  grid-template-columns:1fr 1fr;
  align-items:center;
  gap:4rem;
  width:100%;
}

/* copy column */
.hero-copy{display:flex;flex-direction:column;gap:0}

.pill-badge{
  display:inline-flex;align-items:center;gap:.55rem;
  padding:.4rem 1rem;border-radius:99px;
  border:1px solid rgba(52,211,153,.25);
  background:rgba(52,211,153,.07);
  color:var(--emerald);
  font-size:.8rem;font-weight:600;
  width:fit-content;margin-bottom:1.75rem;
}
.pulse-dot{
  width:7px;height:7px;border-radius:50%;
  background:var(--emerald);
  animation:pulse-ring 2s ease infinite;
}

.hero-headline{
  font-family:var(--font-head);
  font-size:clamp(2.5rem,5.5vw,4.25rem);
  font-weight:900;
  line-height:1.08;
  margin-bottom:1.5rem;
}
.hero-headline em{font-style:normal;color:var(--indigo-lt)}

.hero-sub{
  font-size:1.05rem;
  color:var(--text-2);
  line-height:1.75;
  max-width:48ch;
  margin-bottom:2.25rem;
}

.hero-ctas{
  display:flex;gap:.875rem;flex-wrap:wrap;
  margin-bottom:2.25rem;
}

.hero-social{
  display:flex;gap:.6rem;flex-wrap:wrap;
}
.social-pill{
  display:inline-flex;align-items:center;gap:.45rem;
  padding:.38rem .9rem;
  font-size:.8rem;font-weight:600;
  border-radius:99px;
  border:1px solid var(--border-hv);
  color:var(--text-2);
  transition:var(--t);
}
.social-pill:hover{
  border-color:var(--indigo);
  background:rgba(99,102,241,.08);
  color:var(--text-1);
  transform:translateY(-2px);
}

/* ID Card */
.hero-card-wrap{
  position:relative;
  display:flex;justify-content:center;align-items:center;
}
.id-card{
  position:relative;z-index:2;
  width:100%;max-width:400px;
  background:var(--bg-2);
  border:1px solid var(--border-hv);
  border-radius:var(--radius-xl);
  padding:2rem;
  display:flex;flex-direction:column;gap:1.25rem;
  box-shadow:0 30px 60px rgba(0,0,0,.35);
  transition:transform var(--t-slow), box-shadow var(--t-slow);
}
.id-card:hover{
  transform:translateY(-6px);
  box-shadow:0 40px 80px rgba(0,0,0,.45),0 0 0 1px rgba(99,102,241,.15);
}

.id-card-top{
  display:flex;align-items:center;gap:1rem;
}
.id-avatar{
  width:54px;height:54px;border-radius:50%;flex-shrink:0;
  background:linear-gradient(135deg,var(--indigo) 0%,var(--sky) 100%);
  display:grid;place-items:center;
  font-weight:800;font-size:.95rem;font-family:var(--font-head);
  color:#fff;letter-spacing:1px;
}
.id-meta{flex:1}
.id-meta h2{font-size:1rem;font-weight:700;line-height:1.2;margin-bottom:.15rem}
.id-meta p{font-size:.8rem;color:var(--text-2)}
.id-status{
  display:flex;align-items:center;gap:.35rem;
  font-size:.72rem;font-weight:600;
  color:var(--emerald);
  background:rgba(52,211,153,.08);
  border:1px solid rgba(52,211,153,.2);
  padding:.3rem .7rem;border-radius:99px;
  white-space:nowrap;
}
.id-status i{font-size:.55rem;animation:pulse-ring 2s ease infinite}

.id-divider{height:1px;background:var(--border)}

.id-attrs{display:flex;flex-direction:column;gap:.65rem}
.id-attrs li{
  display:flex;align-items:flex-start;gap:.75rem;
  font-size:.83rem;
}
.id-attrs li i{
  color:var(--indigo-lt);width:16px;flex-shrink:0;margin-top:.1rem;
}
.id-attrs li span{
  display:flex;flex-direction:column;gap:.05rem;
  color:var(--text-2);
}
.id-attrs li span strong{font-weight:600;color:var(--text-1);font-size:.82rem}

.id-stats{
  display:flex;align-items:center;justify-content:space-around;
  padding:1rem;background:var(--surface);
  border:1px solid var(--border);border-radius:var(--radius);
}
.id-stat{display:flex;flex-direction:column;align-items:center;gap:.2rem}
.id-stat strong{
  font-size:1.65rem;font-weight:800;font-family:var(--font-head);
  background:linear-gradient(135deg,var(--indigo-lt),var(--sky));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
  line-height:1;
}
.id-stat span{font-size:.7rem;color:var(--text-3);text-transform:uppercase;letter-spacing:.05em}
.id-stat-sep{width:1px;height:36px;background:var(--border)}

.id-tags{
  display:flex;flex-wrap:wrap;gap:.4rem;
}
.id-tags span{
  padding:.28rem .7rem;
  font-size:.72rem;font-weight:600;
  border-radius:99px;
  background:rgba(99,102,241,.1);
  color:var(--indigo-lt);
  border:1px solid rgba(99,102,241,.2);
}

/* Decorative rings behind card */
.deco-ring{
  position:absolute;border-radius:50%;z-index:0;
  border:1px solid rgba(99,102,241,.12);
  pointer-events:none;
}
.deco-ring-1{width:300px;height:300px;top:-40px;right:-40px;animation:spin-slow 30s linear infinite}
.deco-ring-2{width:200px;height:200px;bottom:-20px;left:-20px;border-color:rgba(56,189,248,.1);animation:spin-slow 20s linear infinite reverse}

.deco-blob-1{
  position:absolute;z-index:0;pointer-events:none;
  width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(99,102,241,.14) 0%,transparent 60%);
  top:-10%;right:-10%;filter:blur(40px);
}

/* Scroll cue */
.scroll-cue{
  position:absolute;bottom:2.5rem;left:50%;transform:translateX(-50%);
  display:flex;flex-direction:column;align-items:center;gap:.5rem;
  color:var(--text-3);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;
  z-index:2;
}
.scroll-bar{
  width:1.5px;height:44px;
  background:linear-gradient(to bottom,var(--indigo),transparent);
  animation:scroll-drop 2s ease-in-out infinite;
}
@keyframes scroll-drop{
  0%  {opacity:1;transform:scaleY(0);transform-origin:top}
  50% {opacity:1;transform:scaleY(1);transform-origin:top}
  51% {transform:scaleY(1);transform-origin:bottom}
  100%{opacity:0;transform:scaleY(0);transform-origin:bottom}
}

/* ══════════════════════════════════════
   MARQUEE STRIP
══════════════════════════════════════ */
.marquee-wrap{
  position:relative;z-index:1;
  overflow:hidden;
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
  padding:.9rem 0;
  background:rgba(99,102,241,.03);
}
.marquee-track{
  display:flex;align-items:center;gap:1.5rem;
  white-space:nowrap;width:max-content;
  animation:marquee 40s linear infinite;
}
.marquee-track span{
  font-size:.8rem;font-weight:600;
  color:var(--text-3);
  text-transform:uppercase;letter-spacing:.05em;
}
.marquee-track .mx{color:var(--indigo-lt);font-size:.65rem}
.marquee-wrap:hover .marquee-track{animation-play-state:paused}

/* ══════════════════════════════════════
   ABOUT SECTION
══════════════════════════════════════ */
.about-section{background:var(--bg)}

.about-grid{
  display:grid;grid-template-columns:1fr 1.2fr;
  align-items:start;gap:4.5rem;
}

/* Visual column */
.about-visual{display:flex;flex-direction:column;gap:1.25rem}

.about-photo-frame{
  position:relative;
  width:100%;aspect-ratio:3/4;max-width:340px;
}
.about-photo-placeholder{
  width:100%;height:100%;border-radius:var(--radius-xl);
  background:linear-gradient(135deg,var(--bg-3) 0%,rgba(99,102,241,.12) 100%);
  border:1px solid var(--border-hv);
  display:flex;align-items:center;justify-content:center;
  font-size:5rem;color:rgba(99,102,241,.4);
  overflow:hidden;
}

.about-edu-badge{
  position:absolute;bottom:-1.5rem;right:-1.5rem;
  display:flex;align-items:center;gap:.65rem;
  padding:.75rem 1.1rem;
  background:var(--bg-2);border:1px solid var(--border-hv);
  border-radius:var(--radius);
  backdrop-filter:blur(10px);
  font-size:.8rem;
  box-shadow:0 8px 24px rgba(0,0,0,.3);
  max-width:220px;
}
.about-edu-badge i{color:var(--indigo-lt);flex-shrink:0;font-size:1rem}
.about-edu-badge strong{font-size:.79rem;display:block;margin-bottom:.1rem}
.about-edu-badge span{font-size:.72rem;color:var(--text-2)}

/* Credential cards */
.cred-list{display:flex;flex-direction:column;gap:.6rem;padding-top:1rem}
.cred-card{
  display:flex;align-items:center;gap:.9rem;
  padding:.9rem 1rem;
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);
  transition:var(--t);
}
.cred-card:hover{background:var(--surface-hv);border-color:var(--border-hv);transform:translateX(4px)}
.cred-icon{
  width:36px;height:36px;border-radius:8px;flex-shrink:0;
  background:rgba(var(--ci-rgb,99,102,241),.12);
  display:grid;place-items:center;
  color:var(--ci,var(--indigo-lt));
  font-size:1rem;
}
.cred-body{flex:1;display:flex;flex-direction:column;gap:.1rem}
.cred-body strong{font-size:.81rem;color:var(--text-1)}
.cred-body span{font-size:.72rem;color:var(--text-3)}
.cred-check{color:var(--emerald);font-size:.85rem;opacity:.8}

/* Content column */
.about-content{display:flex;flex-direction:column}
.about-para{font-size:.98rem;color:var(--text-2);line-height:1.8;margin-bottom:.9rem}
.about-para strong{color:var(--text-1);font-weight:600}

.about-facts{
  display:grid;grid-template-columns:1fr 1fr;gap:.6rem;
  margin:1.5rem 0 2rem;
}
.fact-item{
  display:flex;flex-direction:column;gap:.25rem;
  padding:.85rem 1rem;
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);transition:var(--t);
}
.fact-item:hover{border-color:var(--indigo);background:rgba(99,102,241,.04)}
.fact-label{font-size:.7rem;color:var(--text-3);text-transform:uppercase;letter-spacing:.06em;font-weight:600}
.fact-value{font-size:.87rem;font-weight:600;color:var(--text-1)}
.fact-value.available{color:var(--emerald);display:flex;align-items:center;gap:.35rem}
.fact-value.available i{font-size:.6rem;animation:pulse-ring 2s ease infinite}

.about-actions{display:flex;gap:.75rem;flex-wrap:wrap}

/* ══════════════════════════════════════
   SKILLS SECTION
══════════════════════════════════════ */
.skills-section{background:var(--bg-2)}

/* Container */
.skills-showcase{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:1.5rem;
}
/* Category card */
.skill-category{
  background:var(--bg-3);border:1px solid var(--border);
  border-radius:var(--radius-xl);padding:1.75rem;
  transition:var(--t-slow);
}
.skill-category:hover{
  border-color:var(--border-hv);
  transform:translateY(-4px);
  box-shadow:0 16px 40px rgba(0,0,0,.25);
}
.sc-head{
  display:flex;align-items:center;gap:.85rem;
  margin-bottom:1.5rem;
}
.sc-icon{
  width:42px;height:42px;border-radius:12px;
  display:grid;place-items:center;font-size:1.15rem;
  background:rgba(from var(--ci) r g b / .12);
  color:var(--ci, var(--indigo));
}
/* Fallback */
.skill-category:nth-child(1) .sc-icon{background:rgba(79,70,229,.12);color:#6366f1}
.skill-category:nth-child(2) .sc-icon{background:rgba(14,165,233,.12);color:#38bdf8}
.skill-category:nth-child(3) .sc-icon{background:rgba(251,113,133,.12);color:#fb7185}
.skill-category:nth-child(4) .sc-icon{background:rgba(16,185,129,.12);color:#34d399}
.skill-category:nth-child(5) .sc-icon{background:rgba(251,191,36,.12);color:#fbbf24}

.sc-head h3{
  font-size:1.05rem;font-weight:700;font-family:var(--font-head);
}
.sc-items{
  display:flex;flex-wrap:wrap;gap:.6rem;
}
.sc-item{
  display:inline-flex;align-items:center;gap:.45rem;
  padding:.45rem .85rem;
  background:var(--surface);border:1px solid var(--border);
  border-radius:99px;
  font-size:.82rem;font-weight:600;color:var(--text-1);
  transition:var(--t);
}
.sc-item:hover{
  background:var(--surface-hv);border-color:var(--border-hv);
  transform:translateY(-2px);
}
.sc-item i{
  font-size:.9rem;color:var(--text-3);
}
.sc-item:hover i{
  color:var(--indigo-lt);
}

/* ══════════════════════════════════════
   PROJECTS SECTION
══════════════════════════════════════ */
.projects-section{background:var(--bg)}

/* Filter tabs */
.filter-tabs{
  display:flex;gap:.5rem;flex-wrap:wrap;
  justify-content:center;margin-bottom:2.5rem;
}
.ftab{
  padding:.42rem 1.1rem;
  font-size:.83rem;font-weight:600;
  border-radius:99px;
  border:1px solid var(--border);
  color:var(--text-2);
  background:var(--surface);
  transition:var(--t);
}
.ftab:hover{color:var(--text-1);border-color:var(--border-hv)}
.ftab.active{
  background:var(--indigo);
  color:#fff;
  border-color:var(--indigo);
}

/* Grid */
.projects-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(340px,1fr));
  gap:1.25rem;
  margin-bottom:2.5rem;
}

.project-card{
  background:var(--bg-2);border:1px solid var(--border);
  border-radius:var(--radius-lg);padding:1.5rem;
  display:flex;flex-direction:column;gap:1.25rem;
  transition:var(--t-slow);position:relative;overflow:hidden;
}
.proj-img-wrap{
  width:100%;aspect-ratio:16/9;border-radius:var(--radius);
  overflow:hidden;position:relative;flex-shrink:0;
  border:1px solid rgba(255,255,255,0.04);
}
.proj-img{
  width:100%;height:100%;object-fit:cover;object-position:top;
  transition:transform var(--t-slow);
}
.project-card:hover .proj-img{transform:scale(1.05)}
.proj-content{
  display:flex;flex-direction:column;gap:.9rem;flex:1;
}
.project-card::before{
  content:'';
  position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--indigo),var(--sky));
  opacity:0;transition:opacity var(--t);
}
.project-card:hover::before{opacity:1}
.project-card:hover{
  border-color:var(--border-hv);
  transform:translateY(-4px);
  box-shadow:0 20px 50px rgba(0,0,0,.3);
}
.project-card.featured{
  grid-column:span 2;
  flex-direction:row;gap:2rem;align-items:stretch;
  background:linear-gradient(135deg,rgba(99,102,241,.06) 0%,var(--bg-2) 100%);
  border-color:rgba(99,102,241,.2);
}
.project-card.featured .proj-img-wrap{
  flex: 0 0 50%; max-width: 50%; height: auto;
}
.project-card.featured::before{opacity:1}

/* Cat badge */
.proj-cat-badge{
  display:inline-flex;align-items:center;gap:.4rem;
  font-size:.72rem;font-weight:700;
  padding:.25rem .75rem;border-radius:99px;
  text-transform:uppercase;letter-spacing:.04em;
  width:fit-content;
}
.proj-cat-badge.security{background:rgba(251,113,133,.1);color:#fb7185;border:1px solid rgba(251,113,133,.2)}
.proj-cat-badge.web     {background:rgba(56,189,248,.1); color:#38bdf8;border:1px solid rgba(56,189,248,.2)}
.proj-cat-badge.algo    {background:rgba(251,191,36,.1); color:#fbbf24;border:1px solid rgba(251,191,36,.2)}

.proj-title{font-size:1.05rem;font-weight:700;font-family:var(--font-head);line-height:1.3}
.project-card.featured .proj-title{font-size:1.3rem}
.proj-desc{font-size:.87rem;color:var(--text-2);line-height:1.7;flex:1}

/* Impact row (featured) */
.proj-impact{
  display:flex;gap:1.5rem;padding:.85rem 1.1rem;
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);
}
.impact-item{display:flex;flex-direction:column;gap:.15rem}
.impact-item strong{font-size:1.15rem;font-weight:800;font-family:var(--font-head);color:var(--indigo-lt)}
.impact-item span{font-size:.72rem;color:var(--text-3);text-transform:uppercase;letter-spacing:.04em}

.proj-footer{
  display:flex;justify-content:space-between;align-items:center;
  gap:.75rem;flex-wrap:wrap;margin-top:auto;
}

.proj-tech{display:flex;flex-wrap:wrap;gap:.4rem}
.proj-tech span{
  padding:.2rem .6rem;font-size:.72rem;font-weight:600;
  border-radius:99px;
  background:rgba(255,255,255,.04);border:1px solid var(--border);
  color:var(--text-3);
}
.proj-links{display:flex;gap:.4rem}
.proj-link{
  width:34px;height:34px;border-radius:8px;
  border:1px solid var(--border);
  display:grid;place-items:center;
  color:var(--text-2);font-size:.875rem;
  transition:var(--t);
}
.proj-link:hover{color:var(--text-1);border-color:var(--indigo);background:rgba(99,102,241,.1)}

.projects-footer{display:flex;justify-content:center}

/* ══════════════════════════════════════
   METRICS STRIP
══════════════════════════════════════ */
.metrics-strip{
  position:relative;z-index:1;
  border-top:1px solid var(--border);border-bottom:1px solid var(--border);
  background:var(--bg-2);padding:3rem 0;
}
.metrics-inner{
  display:flex;align-items:center;justify-content:center;
  gap:0;flex-wrap:wrap;
}
.metric{
  display:flex;flex-direction:column;align-items:center;gap:.3rem;
  padding:1.25rem 3.5rem;text-align:center;
}
.metric strong{
  font-size:clamp(2rem,4vw,3rem);font-weight:900;
  font-family:var(--font-head);line-height:1;
  background:linear-gradient(135deg,var(--indigo-lt),var(--sky));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.metric span{
  font-size:.75rem;color:var(--text-3);
  text-transform:uppercase;letter-spacing:.08em;font-weight:600;
}
.metric-sep{width:1px;height:56px;background:var(--border)}

/* ══════════════════════════════════════
   CONTACT SECTION
══════════════════════════════════════ */
.contact-section{background:var(--bg)}

.contact-grid{
  display:grid;grid-template-columns:1fr 1.2fr;
  align-items:start;gap:4rem;
}
.contact-info{display:flex;flex-direction:column}
.contact-desc{font-size:.98rem;color:var(--text-2);line-height:1.8;margin-bottom:2rem}

.contact-channels{display:flex;flex-direction:column;gap:.6rem}
.channel-card{
  display:flex;align-items:center;gap:1rem;
  padding:.9rem 1rem;
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);transition:var(--t);
}
.channel-card:hover{
  border-color:var(--indigo);
  background:rgba(99,102,241,.05);
  transform:translateX(4px);
}
.channel-icon{
  width:40px;height:40px;min-width:40px;border-radius:10px;flex-shrink:0;
  display:grid;place-items:center;font-size:1rem;
  background:rgba(99,102,241,.1);color:var(--ci,var(--indigo-lt));
}
.channel-card:nth-child(2) .channel-icon{background:rgba(0,119,181,.1);color:#0ea5e9}
.channel-card:nth-child(3) .channel-icon{background:rgba(255,255,255,.06);color:var(--text-1)}
.channel-card:nth-child(4) .channel-icon{background:rgba(225,48,108,.1);color:#e1306c} /* Instagram */
.channel-text{flex:1;display:flex;flex-direction:column;gap:.15rem}
.channel-card strong{font-size:.83rem;font-weight:700;color:var(--text-1)}
.channel-card span{font-size:.76rem;color:var(--text-2)}
.channel-arrow{color:var(--text-3);font-size:.78rem;transition:var(--t)}
.channel-card:hover .channel-arrow{color:var(--indigo-lt);transform:translateX(3px)}

/* Contact form */
.contact-form-wrap{}
.contact-form{
  background:var(--bg-2);border:1px solid var(--border);
  border-radius:var(--radius-xl);padding:2.5rem;
  display:flex;flex-direction:column;gap:1.1rem;
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.field-group{display:flex;flex-direction:column;gap:.45rem}
.field-group label{
  font-size:.77rem;font-weight:700;
  color:var(--text-2);text-transform:uppercase;letter-spacing:.06em;
}
.field-group label span{color:var(--rose)}
.field-group input,
.field-group textarea,
.field-group select{
  width:100%;padding:.8rem 1rem;
  background:var(--surface);
  border:1.5px solid var(--border);border-radius:10px;
  color:var(--text-1);font-size:.92rem;
  outline:none;transition:var(--t);
  -webkit-appearance:none;appearance:none;
}
.field-group input::placeholder,
.field-group textarea::placeholder{color:var(--text-3)}
.field-group select{cursor:pointer;background-color:var(--surface)}
.field-group select option{background:#161923;color:var(--text-1)}
.field-group input:focus,
.field-group textarea:focus,
.field-group select:focus{
  border-color:var(--indigo);
  background:rgba(99,102,241,.04);
  box-shadow:0 0 0 3px rgba(99,102,241,.12);
}
.field-group textarea{resize:vertical;min-height:120px}
.form-msg{
  text-align:center;font-size:.84rem;min-height:1.2em;
  transition:var(--t);
}
.form-msg.ok{color:var(--emerald)}
.form-msg.err{color:var(--rose)}

/* ══════════════════════════════════════
   FOOTER
══════════════════════════════════════ */
.site-footer{
  position:relative;z-index:1;
  background:var(--bg-2);
  border-top:1px solid var(--border);
  padding:3.5rem 0 0;
}
.footer-grid{
  display:grid;grid-template-columns:2fr 1fr 1fr;
  gap:2.5rem;padding-bottom:2.5rem;
  border-bottom:1px solid var(--border);
}
.footer-brand{display:flex;flex-direction:column;gap:.85rem}
.footer-brand .brand{font-size:1rem}
.footer-brand p{font-size:.83rem;color:var(--text-3);line-height:1.7}

.footer-nav,.footer-connect{display:flex;flex-direction:column;gap:.55rem}
.footer-nav strong,.footer-connect strong{
  font-size:.75rem;font-weight:700;
  text-transform:uppercase;letter-spacing:.08em;
  color:var(--text-3);margin-bottom:.3rem;
}
.footer-nav a,.footer-connect a{
  font-size:.855rem;color:var(--text-2);
  display:flex;align-items:center;gap:.5rem;
  transition:var(--t);width:fit-content;
}
.footer-nav a:hover,.footer-connect a:hover{color:var(--indigo-lt);transform:translateX(3px)}
.footer-connect a i{width:14px}

.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;
  padding:1.25rem 0;
  font-size:.8rem;color:var(--text-3);
}
.back-top{
  display:flex;align-items:center;gap:.4rem;
  font-weight:600;color:var(--text-2);font-size:.8rem;
  transition:var(--t);
}
.back-top:hover{color:var(--indigo-lt)}

/* ══════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════ */
@media(max-width:1024px){
  .hero-grid{grid-template-columns:1fr;text-align:center;padding-top:5rem;padding-bottom:5rem}
  .hero-copy{align-items:center}
  .hero-sub{text-align:center}
  .hero-ctas,.hero-social{justify-content:center}
  .hero-card-wrap{order:-1;max-width:420px;margin:0 auto;width:100%}
  .scroll-cue{display:none}

  .about-grid,.contact-grid{grid-template-columns:1fr;gap:3rem}
  .about-visual{max-width:340px;margin:0 auto}
  .about-photo-frame{max-width:100%}

  .project-card.featured{grid-column:1;flex-direction:column;gap:1rem}

  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:span 2}
}

@media (max-width:1150px){
  .primary-nav{display:none}
  .burger{display:flex}
  .header-inner{grid-template-columns: 1fr auto}
}

@media(max-width:768px){
  .header-actions .btn-sm:not(.burger){display:none}
  .burger{display:flex}

  .bars-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}

  .metrics-inner{gap:0}
  .metric{padding:1rem 2rem}
  .metric-sep{display:none}

  .footer-grid{grid-template-columns:1fr}
  .footer-brand{grid-column:1}

  .projects-grid{grid-template-columns:1fr}
  .project-card.featured{grid-column:1}

  .section{padding:4rem 0}
}


@media(max-width:480px){
  .id-card{padding:1.5rem}
  .hero-headline{font-size:2.3rem}
  .about-facts{grid-template-columns:1fr}
  .contact-form{padding:1.5rem}
}

/* ══════════════════════════════════════
   EDUCATION TIMELINE
══════════════════════════════════════ */
.edu-timeline{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:1.5rem 1.75rem;
  margin-top:.5rem;
}
.edu-timeline-title{
  font-size:.85rem;font-weight:700;
  color:var(--indigo-lt);
  text-transform:uppercase;letter-spacing:.08em;
  margin-bottom:1.25rem;
  display:flex;align-items:center;gap:.55rem;
}
.edu-timeline-title i{font-size:.9rem}

.edu-item{
  display:flex;align-items:flex-start;gap:1rem;
  position:relative;
  padding-bottom:1.1rem;
}
.edu-item:last-child{padding-bottom:0}
.edu-item:not(:last-child)::before{
  content:'';
  position:absolute;left:7px;top:18px;bottom:0;
  width:1px;background:var(--border);
}
.edu-dot{
  width:15px;height:15px;border-radius:50%;flex-shrink:0;margin-top:2px;
  background:var(--indigo);
  border:2px solid var(--bg);
  box-shadow:0 0 0 2px var(--indigo);
  position:relative;z-index:1;
}
.edu-body{display:flex;flex-direction:column;gap:.18rem}
.edu-year{
  font-size:.72rem;font-weight:700;
  color:var(--indigo-lt);
  text-transform:uppercase;letter-spacing:.05em;
}
.edu-degree{font-size:.87rem;font-weight:700;color:var(--text-1)}
.edu-school{font-size:.78rem;color:var(--text-2)}

/* ══════════════════════════════════════
   CERTIFICATES SECTION
══════════════════════════════════════ */
.certs-section{background:var(--bg-2)}

.certs-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(320px,1fr));
  gap:1.5rem;
}

.cert-card{
  background:var(--bg-3);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  overflow:hidden;
  display:flex;flex-direction:column;
  transition:var(--t-slow);
}
.cert-card:hover{
  border-color:var(--border-hv);
  transform:translateY(-5px);
  box-shadow:0 20px 50px rgba(0,0,0,.35);
}

.cert-img-wrap{
  position:relative;overflow:hidden;
  aspect-ratio:16/10;
  background:var(--bg);
}
.cert-img-wrap img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .5s var(--ease);
}
.cert-card:hover .cert-img-wrap img{transform:scale(1.04)}

.cert-overlay{
  position:absolute;inset:0;
  background:rgba(0,0,0,.5);
  display:flex;align-items:center;justify-content:center;
  opacity:0;transition:opacity var(--t);
  cursor:pointer;
  color:#fff;font-size:1.5rem;
}
.cert-card:hover .cert-overlay{opacity:1}

.cert-body{
  padding:1.5rem;
  display:flex;flex-direction:column;gap:.75rem;
  flex:1;
}

.cert-issuer{
  display:flex;align-items:center;gap:.65rem;
}
.cert-issuer-icon{
  width:32px;height:32px;border-radius:8px;flex-shrink:0;
  background:rgba(var(--ci,99,102,241),.12);
  display:grid;place-items:center;
  color:var(--ci,var(--indigo-lt));font-size:.9rem;
}
/* Explicit fallbacks for cert icons */
.cert-card:nth-child(1) .cert-issuer-icon{background:rgba(99,102,241,.12);color:#818cf8}
.cert-card:nth-child(2) .cert-issuer-icon{background:rgba(239,68,68,.12);color:#ef4444}
.cert-card:nth-child(3) .cert-issuer-icon{background:rgba(14,165,233,.12);color:#38bdf8}
.cert-card:nth-child(4) .cert-issuer-icon{background:rgba(139,92,246,.12);color:#8b5cf6}
.cert-card:nth-child(5) .cert-issuer-icon{background:rgba(16,185,129,.12);color:#34d399}

.cert-issuer span{font-size:.75rem;color:var(--text-3);font-weight:600}

.cert-title{
  font-size:1rem;font-weight:700;
  font-family:var(--font-head);
  color:var(--text-1);line-height:1.3;
}

.cert-desc{
  font-size:.82rem;color:var(--text-2);
  line-height:1.7;flex:1;
}

.cert-badge{
  display:inline-flex;align-items:center;gap:.4rem;
  padding:.3rem .8rem;
  font-size:.72rem;font-weight:700;
  border-radius:99px;width:fit-content;
  background:rgba(52,211,153,.1);
  color:var(--emerald);
  border:1px solid rgba(52,211,153,.2);
}
.cert-badge.distinction{
  background:rgba(251,191,36,.1);
  color:var(--amber);
  border-color:rgba(251,191,36,.2);
}
.cert-badge.leadership{
  background:rgba(139,92,246,.1);
  color:#a78bfa;
  border-color:rgba(139,92,246,.2);
}
.cert-badge.competition{
  background:rgba(56,189,248,.1);
  color:var(--sky);
  border-color:rgba(56,189,248,.2);
}

/* ══════════════════════════════════════
   CERTIFICATE LIGHTBOX
══════════════════════════════════════ */
.cert-lightbox{
  position:fixed;inset:0;z-index:9999;
  display:flex;align-items:center;justify-content:center;
  pointer-events:none;opacity:0;
  transition:opacity .3s var(--ease);
}
.cert-lightbox.open{opacity:1;pointer-events:all}

.cert-lightbox-backdrop{
  position:absolute;inset:0;
  background:rgba(0,0,0,.9);
  backdrop-filter:blur(8px);
  cursor:pointer;
}
.cert-lightbox-inner{
  position:relative;z-index:1;
  max-width:90vw;max-height:90vh;
  display:flex;align-items:center;justify-content:center;
}
.cert-lightbox-inner img{
  max-width:100%;max-height:90vh;
  border-radius:var(--radius);
  box-shadow:0 30px 80px rgba(0,0,0,.6);
  object-fit:contain;
}
.cert-lightbox-close{
  position:absolute;top:-2.5rem;right:0;
  color:#fff;font-size:1.4rem;
  padding:.4rem .6rem;
  border-radius:50%;
  background:rgba(255,255,255,.12);
  transition:background var(--t);
  cursor:pointer;border:none;
}
.cert-lightbox-close:hover{background:rgba(255,255,255,.25)}

/* Responsive adjustments for new components */
@media(max-width:768px){
  .certs-grid{grid-template-columns:1fr}
  .edu-timeline{padding:1.25rem}
}