/* ==========================================================================
   KARTHIKEYAN SELVAMANI — PORTFOLIO
   Design system: "signal scan" — dark lab console with aurora bloom,
   inspired by segmentation-mask overlays & terminal readouts.
   ========================================================================== */

:root{
  /* surfaces */
  --bg:            #06070d;
  --bg-alt:        #090b16;
  --surface:       rgba(255,255,255,0.045);
  --surface-2:     rgba(255,255,255,0.07);
  --border:        rgba(255,255,255,0.10);
  --border-soft:   rgba(255,255,255,0.06);

  /* text */
  --text:          #eef1fb;
  --text-dim:      #9aa1c2;
  --text-faint:    #5c6288;

  /* aurora / accent */
  --violet:        #8b6bf2;
  --cyan:          #22d3ee;
  --magenta:       #f472b6;
  --amber:         #fbbf3f;
  --accent:        #22d3ee;
  --accent-2:      #8b6bf2;

  /* type */
  --f-display: 'Space Grotesk', sans-serif;
  --f-body:    'Inter', sans-serif;
  --f-mono:    'JetBrains Mono', monospace;

  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 8px;

  --ease: cubic-bezier(.16,.84,.44,1);
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{ animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; }
}

body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--f-body);
  font-weight:400;
  line-height:1.6;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
button{ font-family:inherit; cursor:pointer; }
ul{ list-style:none; margin:0; padding:0; }
h1,h2,h3,h4,h5{ font-family:var(--f-display); margin:0; letter-spacing:-0.01em; }
p{ margin:0; }

::selection{ background:var(--accent); color:#06070d; }

.container{ max-width:1240px; margin:0 auto; padding:0 32px; }

::-webkit-scrollbar{ width:9px; }
::-webkit-scrollbar-track{ background:var(--bg); }
::-webkit-scrollbar-thumb{ background:linear-gradient(var(--violet),var(--cyan)); border-radius:10px; }

/* ==========================================================================
   LOADER
   ========================================================================== */
.loader{
  position:fixed; inset:0; z-index:9999;
  background:#06070d;
  display:flex; align-items:center; justify-content:center;
  transition:opacity .6s var(--ease), visibility .6s var(--ease);
}
.loader.hide{ opacity:0; visibility:hidden; }
.loader-inner{ text-align:center; font-family:var(--f-mono); }
.loader-mono{ color:var(--accent); font-size:15px; letter-spacing:.05em; margin-bottom:18px; }
.loader-bar{ width:220px; height:2px; background:var(--border); border-radius:2px; overflow:hidden; margin:0 auto; }
.loader-bar span{ display:block; height:100%; width:0%; background:linear-gradient(90deg,var(--violet),var(--cyan)); transition:width .25s ease; }
.loader-status{ margin-top:14px; font-size:11px; color:var(--text-faint); letter-spacing:.08em; text-transform:uppercase; }

/* ==========================================================================
   CURSOR GLOW
   ========================================================================== */
.cursor-glow{
  position:fixed; top:0; left:0; width:420px; height:420px;
  border-radius:50%; pointer-events:none; z-index:2;
  background:radial-gradient(circle, rgba(34,211,238,0.07) 0%, rgba(139,107,242,0.04) 40%, transparent 70%);
  transform:translate(-50%,-50%);
  transition:opacity .3s ease;
  will-change:transform;
}
@media (hover:none){ .cursor-glow{ display:none; } }

/* ==========================================================================
   SCROLL PROGRESS
   ========================================================================== */
.scroll-progress{ position:fixed; top:0; left:0; width:100%; height:3px; z-index:1001; background:transparent; }
.scroll-progress span{ display:block; height:100%; width:0%; background:linear-gradient(90deg,var(--violet),var(--cyan),var(--magenta)); box-shadow:0 0 12px rgba(34,211,238,.6); }

/* ==========================================================================
   AURORA BACKDROP
   ========================================================================== */
.aurora-field{ position:fixed; inset:0; z-index:0; overflow:hidden; pointer-events:none; }
.blob{ position:absolute; border-radius:50%; filter:blur(90px); opacity:.35; will-change:transform; }
.blob-a{ width:520px; height:520px; background:var(--violet); top:-140px; left:-100px; animation:drift1 22s ease-in-out infinite; }
.blob-b{ width:480px; height:480px; background:var(--cyan); top:20%; right:-160px; animation:drift2 26s ease-in-out infinite; }
.blob-c{ width:420px; height:420px; background:var(--magenta); bottom:-160px; left:30%; animation:drift3 30s ease-in-out infinite; opacity:.22; }
@keyframes drift1{ 0%,100%{ transform:translate(0,0) scale(1);} 50%{ transform:translate(60px,80px) scale(1.15);} }
@keyframes drift2{ 0%,100%{ transform:translate(0,0) scale(1);} 50%{ transform:translate(-70px,60px) scale(1.1);} }
@keyframes drift3{ 0%,100%{ transform:translate(0,0) scale(1);} 50%{ transform:translate(50px,-50px) scale(1.2);} }

.grid-overlay{
  position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse 80% 60% at 50% 0%, black 40%, transparent 100%);
}

/* ==========================================================================
   GLASS COMPONENTS
   ========================================================================== */
.glass{
  background:var(--surface);
  border:1px solid var(--border);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-radius:var(--radius-lg);
}

/* ==========================================================================
   NAVBAR
   ========================================================================== */
.navbar{
  position:fixed; top:0; left:0; width:100%; z-index:1000;
  padding:18px 0;
  transition:padding .3s var(--ease), background .3s var(--ease), border-color .3s var(--ease);
  border-bottom:1px solid transparent;
}
.navbar.scrolled{
  padding:10px 0;
  background:rgba(6,7,13,0.72);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border-soft);
}
.nav-inner{ max-width:1240px; margin:0 auto; padding:0 32px; display:flex; align-items:center; justify-content:space-between; gap:24px; }

.brand{ display:flex; align-items:center; gap:10px; }
.brand-mark-img{ height:36px; width:auto; filter:drop-shadow(0 0 10px rgba(34,211,238,.35)); }
.footer-logo{ height:44px; margin-bottom:16px; }
.brand-dot{ color:var(--accent); }
.brand-name{ font-family:var(--f-mono); font-size:13px; color:var(--text-dim); letter-spacing:.02em; }
.brand-name em{ color:var(--accent); font-style:normal; }

.nav-links{ display:flex; gap:6px; }
.nav-link{
  font-family:var(--f-mono); font-size:12.5px; color:var(--text-dim);
  padding:8px 12px; border-radius:20px; display:flex; align-items:center; gap:6px;
  transition:color .25s ease, background .25s ease;
}
.nav-link span{ color:var(--text-faint); font-size:10px; }
.nav-link:hover{ color:var(--text); background:var(--surface); }

.nav-actions{ display:flex; align-items:center; gap:12px; }
.nav-toggle{ display:none; flex-direction:column; gap:5px; background:none; border:none; padding:6px; }
.nav-toggle span{ width:22px; height:2px; background:var(--text); border-radius:2px; transition:.3s ease; }

/* ==========================================================================
   BUTTONS
   ========================================================================== */
.btn{
  position:relative; overflow:hidden;
  display:inline-flex; align-items:center; justify-content:center; gap:9px;
  font-family:var(--f-body); font-weight:600; font-size:14.5px;
  padding:14px 26px; border-radius:100px; border:1px solid transparent;
  transition:transform .25s var(--ease), box-shadow .25s var(--ease), background .25s ease, border-color .25s ease;
  white-space:nowrap;
}
.btn-sm{ padding:9px 18px; font-size:13px; }
.btn-primary{
  background:linear-gradient(135deg, var(--violet), var(--cyan));
  color:#06070d;
  box-shadow:0 8px 26px -8px rgba(34,211,238,.45);
}
.btn-primary:hover{ transform:translateY(-2px); box-shadow:0 14px 32px -8px rgba(34,211,238,.6); }
.btn-ghost{
  background:var(--surface); color:var(--text); border-color:var(--border);
}
.btn-ghost:hover{ transform:translateY(-2px); border-color:var(--accent); background:rgba(34,211,238,.06); }
.btn.full{ width:100%; }

.ripple{ }
.ripple .ripple-circle{
  position:absolute; border-radius:50%; background:rgba(255,255,255,.5);
  transform:scale(0); animation:ripple-anim .6s ease-out; pointer-events:none;
}
@keyframes ripple-anim{ to{ transform:scale(3); opacity:0; } }

/* ==========================================================================
   HERO
   ========================================================================== */
.hero{
  position:relative; min-height:100vh; display:flex; flex-direction:column; justify-content:center;
  padding:150px 0 60px; overflow:hidden;
}
#particles-js{ position:absolute; inset:0; z-index:0; }

.hero-inner{
  position:relative; z-index:2; max-width:1240px; margin:0 auto; padding:0 32px;
  display:grid; grid-template-columns:1.15fr .85fr; gap:60px; align-items:center;
}

.eyebrow{
  display:inline-flex; align-items:center; gap:9px;
  font-family:var(--f-mono); font-size:12px; letter-spacing:.08em; color:var(--accent);
  border:1px solid var(--border); background:var(--surface);
  padding:8px 16px; border-radius:100px; margin-bottom:26px;
}
.dot-pulse{ width:7px; height:7px; border-radius:50%; background:var(--accent); box-shadow:0 0 0 rgba(34,211,238,.6); animation:pulse-dot 1.8s infinite; }
@keyframes pulse-dot{ 0%{ box-shadow:0 0 0 0 rgba(34,211,238,.55);} 70%{ box-shadow:0 0 0 9px rgba(34,211,238,0);} 100%{ box-shadow:0 0 0 0 rgba(34,211,238,0);} }

.hero-title{
  font-size:clamp(34px, 4.6vw, 60px); line-height:1.08; font-weight:700; color:var(--text);
}
.grad-text{
  background:linear-gradient(120deg,var(--violet),var(--cyan) 60%, var(--magenta));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}

.hero-typed-row{
  font-family:var(--f-mono); font-size:17px; color:var(--text-dim); margin:22px 0 22px;
  min-height:26px;
}
.typed-prefix{ color:var(--accent); }
#typed{ color:var(--text); }
.typed-cursor{ color:var(--accent); animation:blink 1s step-end infinite; }
@keyframes blink{ 50%{ opacity:0; } }

.hero-desc{ max-width:560px; color:var(--text-dim); font-size:16px; line-height:1.75; margin-bottom:34px; }
.hero-desc strong{ color:var(--text); font-weight:600; }

.hero-cta{ display:flex; gap:14px; margin-bottom:52px; flex-wrap:wrap; }

.hero-stats{ display:flex; gap:36px; flex-wrap:wrap; }
.hstat{ display:flex; flex-direction:column; }
.hstat-num{ font-family:var(--f-display); font-size:30px; font-weight:700; color:var(--text); }
.hstat-num::after{ content:'+'; color:var(--accent); }
.hstat-label{ font-size:12px; color:var(--text-faint); font-family:var(--f-mono); margin-top:2px; }

/* ---- hero visual / orb ---- */
.hero-visual{ position:relative; display:flex; align-items:center; justify-content:center; min-height:440px; }
.orb-stage{ position:relative; width:380px; height:380px; }

.orb-ring{ position:absolute; inset:0; border:1px solid var(--border); border-radius:50%; }
.ring-1{ animation:spin 30s linear infinite; }
.ring-2{ inset:34px; border-style:dashed; border-color:rgba(139,107,242,.3); animation:spin 46s linear infinite reverse; }
.ring-3{ inset:68px; border-color:rgba(34,211,238,.25); animation:spin 60s linear infinite; }
@keyframes spin{ to{ transform:rotate(360deg); } }

.ai-orb{
  position:absolute; inset:96px; border-radius:50%;
  background:radial-gradient(circle at 32% 28%, rgba(139,107,242,.85), rgba(34,211,238,.55) 45%, rgba(6,7,13,.9) 78%);
  box-shadow:0 0 70px rgba(139,107,242,.45), inset 0 0 60px rgba(0,0,0,.5);
  animation:float-orb 6s ease-in-out infinite;
  overflow:hidden;
}
@keyframes float-orb{ 0%,100%{ transform:translateY(0);} 50%{ transform:translateY(-14px);} }
.orb-core{
  position:absolute; inset:22%; border-radius:50%;
  background:radial-gradient(circle, rgba(255,255,255,.9), rgba(34,211,238,.15) 70%, transparent 100%);
  filter:blur(2px); opacity:.8;
}
.orb-scan{
  position:absolute; left:0; right:0; height:2px;
  background:linear-gradient(90deg, transparent, var(--cyan), transparent);
  box-shadow:0 0 14px 2px rgba(34,211,238,.8);
  animation:scan-move 3.2s ease-in-out infinite;
}
@keyframes scan-move{ 0%{ top:8%; opacity:0;} 10%{opacity:1;} 50%{ top:88%; opacity:1;} 60%{opacity:0;} 100%{ top:8%; opacity:0;} }

.orb-tag{
  position:absolute; font-family:var(--f-mono); font-size:11px; color:var(--text);
  background:rgba(6,7,13,.85); border:1px solid var(--border); border-radius:100px;
  padding:5px 11px; white-space:nowrap; animation:tag-float 5s ease-in-out infinite;
  backdrop-filter:blur(6px);
}
.t1{ top:2%; left:-4%; animation-delay:.2s; }
.t2{ top:66%; left:-14%; animation-delay:1.1s; }
.t3{ top:12%; right:-10%; animation-delay:.6s; }
.t4{ bottom:2%; right:-6%; animation-delay:1.6s; }
@keyframes tag-float{ 0%,100%{ transform:translateY(0);} 50%{ transform:translateY(-8px);} }

.chat-preview{
  position:absolute; bottom:-30px; left:50%; transform:translateX(-50%);
  width:250px; background:rgba(9,11,22,.85); border:1px solid var(--border); border-radius:var(--radius-md);
  padding:14px 16px; backdrop-filter:blur(14px); font-family:var(--f-mono); font-size:11.5px;
  box-shadow:0 20px 50px -20px rgba(0,0,0,.7);
}
.chat-preview-head{ display:flex; align-items:center; gap:7px; color:var(--text-dim); margin-bottom:9px; font-size:11px; }
.chat-dot{ width:7px; height:7px; border-radius:50%; background:#34d399; box-shadow:0 0 8px #34d399; }
.chat-line{ display:flex; align-items:center; gap:7px; color:var(--text-faint); padding:3px 0; }
.chat-line.success{ color:#34d399; }
.chat-line i{ width:12px; font-size:10px; }

.scroll-cue{
  position:absolute; bottom:26px; left:50%; transform:translateX(-50%); z-index:2;
  display:flex; flex-direction:column; align-items:center; gap:8px;
  font-family:var(--f-mono); font-size:10px; letter-spacing:.15em; color:var(--text-faint);
  animation:bob 2.4s ease-in-out infinite;
}
@keyframes bob{ 0%,100%{ transform:translate(-50%,0);} 50%{ transform:translate(-50%,8px);} }

/* ==========================================================================
   SECTIONS — shared
   ========================================================================== */
.section{ position:relative; z-index:1; padding:120px 0; }
.section-alt{ background:linear-gradient(180deg, transparent, rgba(255,255,255,.015) 12%, rgba(255,255,255,.015) 88%, transparent); }
.section-head{ margin-bottom:56px; max-width:640px; }
.section-eyebrow{
  font-family:var(--f-mono); font-size:12.5px; letter-spacing:.1em; color:var(--accent);
  display:block; margin-bottom:14px; text-transform:uppercase;
}
.section-title{ font-size:clamp(28px,3.4vw,42px); font-weight:700; margin-bottom:12px; }
.section-sub{ color:var(--text-dim); font-size:16px; }

/* ==========================================================================
   ABOUT
   ========================================================================== */
.about-grid{ display:grid; grid-template-columns:.85fr 1.15fr; gap:44px; align-items:start; }
.about-card{ padding:38px 30px; text-align:center; }
.avatar-photo{
  width:120px; height:120px; margin:0 auto 20px; border-radius:26px;
  padding:3px;
  background:linear-gradient(135deg,var(--cyan),var(--violet));
  box-shadow:0 14px 40px -10px rgba(34,211,238,.4);
}
.avatar-photo img{
  width:100%; height:100%; object-fit:cover; border-radius:24px;
  filter:saturate(1.05) contrast(1.02);
}
.about-card h3{ font-size:21px; margin-bottom:4px; }
.about-role{ color:var(--text-dim); font-size:13.5px; font-family:var(--f-mono); margin-bottom:26px; }
.about-facts{ text-align:left; display:flex; flex-direction:column; gap:14px; margin-bottom:26px; }
.about-facts li{ display:flex; align-items:center; gap:11px; font-size:13.5px; color:var(--text-dim); }
.about-facts i{ color:var(--accent); width:16px; text-align:center; }
.fact-crest{ width:16px; height:16px; object-fit:contain; border-radius:3px; }
.about-socials{ display:flex; gap:10px; justify-content:center; }
.social-btn{
  width:40px; height:40px; border-radius:12px; display:flex; align-items:center; justify-content:center;
  background:var(--surface); border:1px solid var(--border); color:var(--text-dim);
  transition:.25s var(--ease);
}
.social-btn:hover{ color:#06070d; background:var(--accent); border-color:var(--accent); transform:translateY(-3px); }

.about-text p{ color:var(--text-dim); font-size:15.5px; line-height:1.85; margin-bottom:18px; }
.about-text strong{ color:var(--text); font-weight:600; }

.about-counters{ display:grid; grid-template-columns:repeat(4,1fr); gap:14px; margin-top:32px; }
.counter-card{
  background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-md);
  padding:18px 10px; text-align:center;
}
.counter-num{ font-family:var(--f-display); font-size:24px; font-weight:700; color:var(--accent); }
.counter-plus{ font-family:var(--f-display); font-size:20px; color:var(--accent); }
.counter-label{ display:block; font-size:11px; color:var(--text-faint); margin-top:6px; font-family:var(--f-mono); line-height:1.4; }

/* ==========================================================================
   TECH GRID
   ========================================================================== */
.tech-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:22px; }
.tech-card{
  padding:30px 26px; transition:transform .35s var(--ease), border-color .35s ease, box-shadow .35s ease;
}
.tech-card:hover{ transform:translateY(-6px); border-color:rgba(34,211,238,.35); box-shadow:0 20px 50px -22px rgba(34,211,238,.35); }
.tech-icon{
  width:52px; height:52px; border-radius:14px; display:flex; align-items:center; justify-content:center;
  background:linear-gradient(135deg, rgba(139,107,242,.18), rgba(34,211,238,.18));
  color:var(--accent); font-size:20px; margin-bottom:18px;
}
.tech-card h3{ font-size:18px; margin-bottom:8px; }
.tech-card p{ color:var(--text-dim); font-size:14px; line-height:1.6; margin-bottom:18px; }
.tech-chips{ display:flex; flex-wrap:wrap; gap:8px; }
.tech-chips span{
  font-family:var(--f-mono); font-size:11px; color:var(--text-dim);
  border:1px solid var(--border-soft); padding:5px 10px; border-radius:100px;
}

/* ==========================================================================
   SKILLS
   ========================================================================== */
.skills-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:40px; margin-bottom:50px; }
.skills-col h4{ font-family:var(--f-mono); font-size:13px; color:var(--accent); letter-spacing:.06em; text-transform:uppercase; margin-bottom:22px; }
.skill-bar{ margin-bottom:20px; }
.skill-top{ display:flex; justify-content:space-between; font-size:13.5px; margin-bottom:8px; color:var(--text-dim); }
.skill-top span:first-child{ color:var(--text); font-weight:500; }
.bar-track{ height:6px; border-radius:6px; background:var(--surface); overflow:hidden; border:1px solid var(--border-soft); }
.bar-fill{ height:100%; width:0%; border-radius:6px; background:linear-gradient(90deg,var(--violet),var(--cyan)); transition:width 1.4s var(--ease); }

.chip-cloud{ display:flex; flex-wrap:wrap; gap:11px; }
.chip{
  font-family:var(--f-mono); font-size:12.5px; color:var(--text-dim);
  background:var(--surface); border:1px solid var(--border); padding:8px 16px; border-radius:100px;
  transition:.3s var(--ease); animation:chip-bob 4.5s ease-in-out infinite;
}
.chip:nth-child(odd){ animation-delay:.4s; }
.chip:nth-child(3n){ animation-delay:.9s; }
.chip:hover{ color:#06070d; background:var(--accent); border-color:var(--accent); transform:translateY(-4px); }
@keyframes chip-bob{ 0%,100%{ transform:translateY(0);} 50%{ transform:translateY(-5px);} }

/* ==========================================================================
   TIMELINE
   ========================================================================== */
.timeline{ position:relative; max-width:800px; margin:0 auto; padding-left:34px; border-left:1px solid var(--border); }
.tl-item{ position:relative; padding-bottom:38px; }
.tl-item:last-child{ padding-bottom:0; }
.tl-dot{
  position:absolute; left:-40px; top:6px; width:13px; height:13px; border-radius:50%;
  background:var(--bg); border:2px solid var(--accent); box-shadow:0 0 0 4px rgba(34,211,238,.12);
}
.tl-card{ padding:22px 24px; }
.tl-date{ font-family:var(--f-mono); font-size:11.5px; color:var(--accent); letter-spacing:.05em; }
.tl-card h3{ font-size:17px; margin:8px 0 8px; }
.tl-card p{ color:var(--text-dim); font-size:14px; line-height:1.7; }

/* ==========================================================================
   PROJECTS
   ========================================================================== */
.project-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:26px; }
.project-card{
  overflow:hidden; transition:transform .1s linear, box-shadow .35s ease, border-color .35s ease;
  transform-style:preserve-3d; will-change:transform;
}
.project-card:hover{ border-color:rgba(34,211,238,.3); box-shadow:0 26px 60px -26px rgba(34,211,238,.3); }
.project-media{
  position:relative; height:150px; display:flex; align-items:center; justify-content:center;
  background:linear-gradient(135deg, rgba(139,107,242,.16), rgba(34,211,238,.1));
  border-bottom:1px solid var(--border-soft);
}
.project-glyph{ font-size:52px; color:rgba(255,255,255,.14); }
.project-media-photo{ overflow:hidden; padding:0; }
.project-media-photo img{
  width:100%; height:100%; object-fit:cover; object-position:top center;
  filter:saturate(1.05);
  transition:transform .6s var(--ease);
}
.project-card:hover .project-media-photo img{ transform:scale(1.06); }
.project-media-photo::after{
  content:''; position:absolute; inset:0;
  background:linear-gradient(180deg, rgba(6,7,13,.05), rgba(6,7,13,.55));
}
.project-tag{
  position:absolute; top:14px; left:16px; z-index:2; font-family:var(--f-mono); font-size:10.5px;
  color:var(--accent); background:rgba(6,7,13,.7); border:1px solid var(--border); padding:5px 12px; border-radius:100px;
}
.project-body{ padding:26px 26px 28px; }
.project-body h3{ font-size:20px; margin-bottom:10px; }
.project-body p{ color:var(--text-dim); font-size:14px; line-height:1.7; margin-bottom:18px; }
.project-tech{ display:flex; flex-wrap:wrap; gap:8px; margin-bottom:22px; }
.project-tech span{ font-family:var(--f-mono); font-size:11px; color:var(--text-dim); border:1px solid var(--border-soft); padding:5px 10px; border-radius:100px; }
.project-links{ display:flex; gap:10px; flex-wrap:wrap; }

/* ==========================================================================
   RESEARCH / LEADERSHIP
   ========================================================================== */
.research-card{ display:flex; gap:26px; padding:34px; margin-bottom:44px; align-items:flex-start; }
.research-badge{
  flex:none; width:58px; height:58px; border-radius:16px; display:flex; align-items:center; justify-content:center;
  background:linear-gradient(135deg,var(--violet),var(--cyan)); color:#06070d; font-size:22px;
}
.research-content h3{ font-size:19px; line-height:1.4; margin-bottom:10px; }
.research-content p{ color:var(--text-dim); font-size:14px; margin-bottom:6px; }
.research-meta{ font-family:var(--f-mono); font-size:12px !important; color:var(--text-faint) !important; margin-bottom:18px !important; }

.stats-band{ display:grid; grid-template-columns:repeat(4,1fr); gap:20px; margin-bottom:50px; }
.stat-block{
  text-align:center; padding:28px 12px; border:1px solid var(--border); border-radius:var(--radius-md); background:var(--surface);
}
.stat-block .counter-num{ font-size:34px; }
.counter-suffix{ font-family:var(--f-display); font-size:22px; color:var(--accent); }
.stat-block-label{ display:block; margin-top:8px; font-family:var(--f-mono); font-size:11.5px; color:var(--text-faint); }

.badge-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:18px; margin-bottom:44px; }
.badge-card{
  padding:22px 18px; border:1px solid var(--border); border-radius:var(--radius-md); background:var(--surface);
  text-align:center; transition:.3s var(--ease);
}
.badge-card:hover{ transform:translateY(-5px); border-color:rgba(139,107,242,.4); }
.badge-card i{ font-size:22px; color:var(--accent); margin-bottom:12px; }
.badge-img{ width:44px; height:44px; object-fit:contain; margin:0 auto 12px; }
.badge-card h4{ font-size:13.5px; margin-bottom:6px; line-height:1.4; }
.badge-card span{ font-family:var(--f-mono); font-size:11px; color:var(--text-faint); }

.leadership-row{ display:flex; flex-wrap:wrap; gap:12px; }
.lead-chip{
  display:flex; align-items:center; gap:9px; font-size:13px; color:var(--text-dim);
  border:1px solid var(--border); padding:11px 18px; border-radius:100px; background:var(--surface);
}
.lead-chip i{ color:var(--accent); }

/* ==========================================================================
   CONTACT
   ========================================================================== */
.contact-grid{ display:grid; grid-template-columns:.85fr 1.15fr; gap:44px; }
.contact-info{ display:flex; flex-direction:column; gap:16px; }
.contact-line{
  display:flex; align-items:center; gap:16px; padding:18px 20px; border:1px solid var(--border);
  border-radius:var(--radius-md); background:var(--surface); transition:.3s var(--ease);
}
a.contact-line:hover{ border-color:var(--accent); transform:translateX(4px); }
.contact-line i{ font-size:17px; color:var(--accent); width:20px; text-align:center; }
.contact-line span{ display:block; font-family:var(--f-mono); font-size:11px; color:var(--text-faint); margin-bottom:3px; }
.contact-line strong{ font-size:14px; color:var(--text); font-weight:500; }
.contact-socials{ justify-content:flex-start; margin-top:10px; }

.contact-form{ padding:34px; display:flex; flex-direction:column; gap:18px; }
.form-row{ display:flex; flex-direction:column; gap:8px; }
.form-row label{ font-family:var(--f-mono); font-size:12px; color:var(--text-dim); }
.form-row input, .form-row textarea{
  background:rgba(255,255,255,.03); border:1px solid var(--border); border-radius:var(--radius-sm);
  padding:13px 16px; color:var(--text); font-family:var(--f-body); font-size:14px; resize:vertical;
  transition:border-color .25s ease, background .25s ease;
}
.form-row input:focus, .form-row textarea:focus{ outline:none; border-color:var(--accent); background:rgba(34,211,238,.05); }
.form-note{ font-family:var(--f-mono); font-size:12px; color:var(--accent); min-height:16px; }

/* ==========================================================================
   GALLERY / SNAPSHOTS
   ========================================================================== */
.snap-grid{
  display:grid; grid-template-columns:repeat(4,1fr); grid-auto-rows:220px; gap:18px;
}
.snap-item{
  position:relative; border-radius:var(--radius-md); overflow:hidden; cursor:pointer;
  border:1px solid var(--border); background:var(--surface);
}
.snap-item.span-2{ grid-column:span 2; }
.snap-item img{ width:100%; height:100%; object-fit:cover; transition:transform .5s var(--ease), filter .5s ease; }
.snap-item:hover img{ transform:scale(1.05); filter:brightness(1.05); }
.snap-item::after{
  content:'\f00e'; font-family:'Font Awesome 6 Free'; font-weight:900;
  position:absolute; top:14px; right:14px; width:34px; height:34px; border-radius:50%;
  background:rgba(6,7,13,.65); border:1px solid var(--border); color:var(--text);
  display:flex; align-items:center; justify-content:center; font-size:13px;
  opacity:0; transition:opacity .3s ease;
}
.snap-item:hover::after{ opacity:1; }
.snap-caption{
  position:absolute; left:0; right:0; bottom:0; padding:14px 16px;
  font-family:var(--f-mono); font-size:11.5px; color:var(--text);
  background:linear-gradient(0deg, rgba(6,7,13,.85), transparent);
}

.lightbox{
  position:fixed; inset:0; z-index:2000; background:rgba(4,5,10,.92); backdrop-filter:blur(10px);
  display:flex; align-items:center; justify-content:center; padding:40px;
  opacity:0; visibility:hidden; transition:.3s ease;
}
.lightbox.open{ opacity:1; visibility:visible; }
.lightbox img{ max-width:90vw; max-height:88vh; border-radius:var(--radius-md); border:1px solid var(--border); box-shadow:0 30px 90px -20px rgba(0,0,0,.7); }
.lightbox-close{
  position:absolute; top:24px; right:28px; width:44px; height:44px; border-radius:50%;
  background:var(--surface); border:1px solid var(--border); color:var(--text); font-size:16px;
  display:flex; align-items:center; justify-content:center; transition:.25s ease;
}
.lightbox-close:hover{ background:var(--accent); color:#06070d; }

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer{ position:relative; z-index:1; border-top:1px solid var(--border-soft); padding:70px 0 0; }
.footer-inner{ display:grid; grid-template-columns:1.1fr .7fr 1fr; gap:40px; padding-bottom:50px; }
.footer-brand p{ color:var(--text-dim); font-size:13.5px; margin:16px 0 20px; max-width:280px; line-height:1.7; }
.footer-links h5{ font-family:var(--f-mono); font-size:12px; color:var(--accent); text-transform:uppercase; letter-spacing:.08em; margin-bottom:18px; }
.footer-links a{ display:block; color:var(--text-dim); font-size:14px; margin-bottom:12px; transition:.25s ease; }
.footer-links a:hover{ color:var(--accent); padding-left:4px; }
.footer-terminal pre{
  font-family:var(--f-mono); font-size:12.5px; color:var(--text-dim); background:var(--surface);
  border:1px solid var(--border); border-radius:var(--radius-md); padding:20px; line-height:1.8; margin:0;
  white-space:pre-wrap;
}
.footer-terminal pre > *{ color:var(--accent); }
.footer-bottom{ border-top:1px solid var(--border-soft); padding:22px 0; text-align:center; }
.footer-bottom p{ font-size:12.5px; color:var(--text-faint); font-family:var(--f-mono); }

/* ==========================================================================
   BACK TO TOP
   ========================================================================== */
.back-to-top{
  position:fixed; bottom:28px; right:28px; z-index:900;
  width:48px; height:48px; border-radius:50%; border:1px solid var(--border);
  background:rgba(9,11,22,.8); backdrop-filter:blur(10px); color:var(--text);
  display:flex; align-items:center; justify-content:center; font-size:16px;
  opacity:0; visibility:hidden; transform:translateY(10px);
  transition:.3s var(--ease);
}
.back-to-top.show{ opacity:1; visibility:visible; transform:translateY(0); }
.back-to-top:hover{ background:var(--accent); color:#06070d; border-color:var(--accent); }

/* ==========================================================================
   AOS OVERRIDES (avoid conflicting inline transforms with tilt/magnetic)
   ========================================================================== */
[data-aos]{ pointer-events:auto; }

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 1080px){
  .hero-inner{ grid-template-columns:1fr; }
  .hero-visual{ order:-1; min-height:340px; }
  .about-grid, .contact-grid{ grid-template-columns:1fr; }
  .tech-grid{ grid-template-columns:repeat(2,1fr); }
  .skills-grid{ grid-template-columns:1fr 1fr; }
  .stats-band, .badge-grid{ grid-template-columns:repeat(2,1fr); }
  .project-grid{ grid-template-columns:1fr; }
  .footer-inner{ grid-template-columns:1fr; }
}

@media (max-width: 760px){
  .nav-links{ position:fixed; top:64px; left:16px; right:16px; flex-direction:column; background:rgba(9,11,22,.96); border:1px solid var(--border); border-radius:var(--radius-md); padding:14px; gap:2px; backdrop-filter:blur(16px); transform:translateY(-14px); opacity:0; visibility:hidden; transition:.3s var(--ease); }
  .nav-links.open{ transform:translateY(0); opacity:1; visibility:visible; }
  .nav-link{ padding:12px 14px; }
  .nav-toggle{ display:flex; }
  .nav-actions .btn-sm span{ display:none; }
  .container{ padding:0 20px; }
  .hero-inner{ padding:0 20px; }
  .hero-stats{ gap:22px; }
  .about-counters{ grid-template-columns:repeat(2,1fr); }
  .skills-grid{ grid-template-columns:1fr; }
  .tech-grid{ grid-template-columns:1fr; }
  .stats-band, .badge-grid{ grid-template-columns:1fr 1fr; }
  .research-card{ flex-direction:column; }
  .section{ padding:80px 0; }
  .snap-grid{ grid-template-columns:repeat(2,1fr); grid-auto-rows:170px; }
  .snap-item.span-2{ grid-column:span 2; }
}