/* =========================================================================
   SABIN SHARMA — Security Portfolio
   Design tokens
   ========================================================================= */
:root{
  --bg:        #0a0c10;
  --bg-panel:  #10131a;
  --bg-elev:   #161a22;
  --border:    #242a35;
  --border-soft: #1a1e27;

  --text:      #e9ebf0;
  --text-dim:  #8b93a3;
  --text-faint:#5c6579;

  --amber:     #ffb454;
  --amber-dim: #cf9445;
  --cyan:      #55c8e0ff;
  --cyan:      #4fc3f7;

  --font-display: "Space Grotesk", sans-serif;
  --font-body:    "Inter", sans-serif;
  --font-mono:    "JetBrains Mono", monospace;

  --radius: 8px;
  --radius-sm: 4px;
  --maxw: 1180px;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img {
  max-width: 100%;
  display: block;
}

.img-circle {
  width: 130px;
  height: 130px;
  border-radius: 50%;
  object-fit: cover;
  /* object-position: center; */
  margin-left: 40px;
  border: 2px solid var(--amber);
  box-shadow: 0 0 8px var(--amber),
              0 0 16px rgba(255, 180, 84, 0.35);
  animation: photo-glow 2.5s ease-in-out infinite;
}

@keyframes photo-glow {
  0%, 100% {
    box-shadow: 0 0 8px var(--amber),
                0 0 16px rgba(255, 180, 84, 0.35);
  }
  50% {
    box-shadow: 0 0 12px var(--amber),
                0 0 24px rgba(255, 180, 84, 0.45);
  }
}
a{ color:inherit; text-decoration:none; }
ul{ list-style:none; margin:0; padding:0; }
h1,h2,h3,h4,h5{ font-family:var(--font-display); margin:0; font-weight:600; }
p{ margin:0; }
::selection{ background:var(--amber); color:#101216; }
:focus-visible{ outline:2px solid var(--cyan); outline-offset:2px; }

.container{
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 28px;
}

/* subtle background grid texture on dark sections */
.grid-tex{
  position:relative;
}
.grid-tex::before{
  content:"";
  position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 100%);
  pointer-events:none;
}

/* =========================================================================
   Eyebrow / terminal-prompt labels — signature motif
   ========================================================================= */
.prompt{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:0.82rem;
  color:var(--cyan);
  letter-spacing:0.3px;
  margin-bottom:14px;
}
.prompt::before{
  content:"";
  width:7px; height:7px;
  border-radius:50%;
  background:var(--amber);
  box-shadow:0 0 8px var(--amber);
  flex-shrink:0;
}
.prompt .cmd{ color:var(--text-dim); }
.prompt .arg{ color:var(--amber); }

.section-head{
  max-width:640px;
  margin-bottom:48px;
}
.section-head h2{
  font-size:clamp(1.6rem, 2.6vw, 2.1rem);
  letter-spacing:-0.01em;
  margin-bottom:10px;
}
.section-head p{
  color:var(--text-dim);
  font-size:1rem;
}

section{
  padding:96px 0;
  border-bottom:1px solid var(--border-soft);
}
section.tight{ padding:72px 0; }

/* =========================================================================
   Buttons
   ========================================================================= */
.btn{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:0.82rem;
  letter-spacing:0.2px;
  padding:12px 22px;
  border-radius:var(--radius-sm);
  border:1px solid var(--border);
  transition:border-color .18s ease, transform .18s ease, background .18s ease, color .18s ease;
  cursor:pointer;
  white-space:nowrap;
}
.btn:hover{ transform:translateY(-1px); }
.btn-primary{
  background:var(--amber);
  color:#161005;
  border-color:var(--amber);
  font-weight:600;
}
.btn-primary:hover{ background:#ffc978; }
.btn-ghost{
  background:transparent;
  color:var(--text);
}
.btn-ghost:hover{ border-color:var(--cyan); color:var(--cyan); }
.btn-row{ display:flex; flex-wrap:wrap; gap:14px; }

/* =========================================================================
   Header / Sidebar nav
   ========================================================================= */
#header{
  position:fixed;
  top:0; left:0; bottom:0;
  width:260px;
  background:var(--bg-panel);
  border-right:1px solid var(--border);
  display:flex;
  flex-direction:column;
  padding:34px 26px;
  z-index:100;
  overflow-y:auto;
}
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:26px;
}
.brand-mark{
  width:40px; height:40px;
  border-radius:var(--radius-sm);
  background:linear-gradient(155deg, var(--amber), var(--amber-dim));
  display:flex; align-items:center; justify-content:center;
  font-family:var(--font-mono);
  font-weight:700;
  color:#161005;
  font-size:1.05rem;
}
.brand h1{ font-size:1.05rem; letter-spacing:0.5px; }
.brand span{ display:block; font-family:var(--font-mono); font-size:0.7rem; color:var(--text-faint); letter-spacing:1px; }


.status-chip{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-family:var(--font-mono);
  font-size:0.7rem;
  color:var(--amber);
  background:rgba(255,180,84,0.08);
  border:1px solid rgba(255,180,84,0.25);
  padding:5px 10px;
  border-radius:20px;
  margin-bottom:24px;
  letter-spacing:0.4px;
}
.status-chip i{ width:3px; height:6px; border-radius:50%; background:var(--amber); box-shadow:0 0 6px var(--amber); }

.navmenu{ flex:1; }
.navmenu ul{ display:flex; flex-direction:column; gap:2px; }
.navmenu a{
  display:flex;
  align-items:center;
  gap:11px;
  font-family:var(--font-mono);
  font-size:0.86rem;
  color:var(--text-dim);
  padding:9px 10px;
  border-radius:var(--radius-sm);
  border-left:2px solid transparent;
  transition:all .15s ease;
}
.navmenu a i{ font-size:0.95rem; width:18px; text-align:center; }
.navmenu a:hover{ color:var(--text); background:var(--bg-elev); }
.navmenu a.active{ color:var(--amber); border-left-color:var(--amber); background:var(--bg-elev); }

.side-social{
  display:flex;
  gap:14px;
  padding-top:20px;
  border-top:1px solid var(--border-soft);
  margin-top:20px;
}
.side-social a{ color:var(--text-faint); font-size:1.05rem; transition:color .15s; }
.side-social a:hover{ color:var(--cyan); }

.header-toggle{
  display:none;
  position:fixed;
  top:16px; right:16px;
  z-index:200;
  background:var(--bg-elev);
  border:1px solid var(--border);
  color:var(--text);
  width:42px; height:42px;
  border-radius:var(--radius-sm);
  align-items:center; justify-content:center;
  font-size:1.2rem;
  cursor:pointer;
}

main{ margin-left:260px; }

/* =========================================================================
   Hero
   ========================================================================= */
#hero{
  min-height:88vh;
  display:flex;
  align-items:center;
  position:relative;
  background:var(--bg);
  border-bottom:1px solid var(--border-soft);
}
#hero .container{ position:relative; z-index:2; }
#hero .eyebrow-row{ margin-bottom:22px; }
#hero h2{
  font-size:clamp(2.4rem, 5.5vw, 4.2rem);
  line-height:1.03;
  letter-spacing:-0.02em;
  margin-bottom:18px;
}
#hero h2 .accent{ color:var(--amber); }
#hero .role-line{
  font-family:var(--font-mono);
  font-size:clamp(1rem, 1.6vw, 1.25rem);
  color:var(--text-dim);
  min-height:1.6em;
  margin-bottom:30px;
}
#hero .role-line .typed{ color:var(--cyan); }
#hero .role-line .cursor{
  display:inline-block;
  width:9px; height:1.05em;
  background:var(--cyan);
  margin-left:2px;
  transform:translateY(2px);
  animation:blink 1s step-end infinite;
}
@keyframes blink{ 50%{ opacity:0; } }

#hero .lede{
  max-width:560px;
  color:var(--text-dim);
  font-size:1.05rem;
  margin-bottom:34px;
}

/* =========================================================================
   About
   ========================================================================= */
.about-grid{
  display:grid;
  grid-template-columns:0.85fr 1.15fr;
  gap:56px;
  align-items:start;
}
.about-photo{
  border-radius:var(--radius);
  overflow:hidden;
  border:1px solid var(--border);
}
.about-copy h3{ font-size:1.35rem; margin-bottom:14px; }
.about-copy p{ color:var(--text-dim); margin-bottom:16px; }
.about-copy p:last-of-type{ margin-bottom:0; }

.fact-grid{
  margin-top:30px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px 28px;
}
.fact{
  display:flex;
  flex-direction:column;
  gap:3px;
  padding-bottom:12px;
  border-bottom:1px solid var(--border-soft);
}
.fact .k{ font-family:var(--font-mono); font-size:0.72rem; color:var(--text-faint); letter-spacing:1px; text-transform:uppercase; }
.fact .v{ font-size:0.95rem; color:var(--text); }
.fact .v a:hover{ color:var(--cyan); }

.focus-row{
  margin-top:34px;
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.focus-chip{
  font-family:var(--font-mono);
  font-size:0.78rem;
  color:var(--text-dim);
  border:1px solid var(--border);
  padding:7px 13px;
  border-radius:20px;
}
.focus-chip i{ color:var(--amber); margin-right:6px; }

/* =========================================================================
   Skills
   ========================================================================= */
.skills-grid{
  display:grid;
  grid-template-columns:repeat(2, 1fr);
  gap:36px 48px;
}
.skill-cat h5{
  font-family:var(--font-mono);
  color:var(--text);
  font-size:0.8rem;
  letter-spacing:1.5px;
  text-transform:uppercase;
  margin-bottom:14px;
  padding-bottom:10px;
  border-bottom:1px solid var(--border);
  display:flex;
  align-items:center;
  gap:9px;
}
.skill-cat h5 i{ color:var(--amber); }
.skill-tags{ display:flex; flex-wrap:wrap; gap:8px; }
.skill-tag{
  background:var(--bg-panel);
  border:1px solid var(--border);
  color:var(--text-dim);
  font-family:var(--font-mono);
  font-size:0.76rem;
  padding:6px 12px;
  border-radius:var(--radius-sm);
  transition:border-color .18s, color .18s;
}
.skill-tag:hover{ border-color:var(--cyan); color:var(--cyan); }
.skill-cat{ margin-bottom:8px; }

/* =========================================================================
   Timeline (Resume)
   ========================================================================= */
.timeline-cols{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
}
.tl-label{
  font-family:var(--font-mono);
  font-size:0.75rem;
  letter-spacing:2px;
  text-transform:uppercase;
  color:var(--amber);
  margin-bottom:22px;
  padding-bottom:10px;
  border-bottom:1px solid var(--border);
}
.tl-item{
  position:relative;
  padding-left:22px;
  border-left:1px solid var(--border);
  padding-bottom:28px;
}
.tl-item:last-child{ padding-bottom:0; }
.tl-item::before{
  content:"";
  position:absolute;
  left:-4.5px; top:4px;
  width:8px; height:8px;
  border-radius:50%;
  background:var(--bg);
  border:2px solid var(--cyan);
}
.tl-item h4{ font-size:1rem; margin-bottom:3px; }
.tl-item .meta{
  font-family:var(--font-mono);
  font-size:0.75rem;
  color:var(--amber);
  margin-bottom:8px;
  display:block;
}
.tl-item p, .tl-item ul{ color:var(--text-dim); font-size:0.92rem; }
.tl-item ul{ margin-top:6px; padding-left:18px; list-style:disc; }
.tl-item ul li{ margin-bottom:4px; }

.resume-cta{ margin-top:44px; }

/* =========================================================================
   Projects — prominent
   ========================================================================= */
.project-grid{
  display:grid;
  grid-template-columns:repeat(2, 1fr);
  gap:26px;
}
.project-card{
  background:var(--bg-panel);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:30px;
  display:flex;
  flex-direction:column;
  transition:border-color .2s ease, transform .2s ease;
}
.project-card:hover{ border-color:var(--amber); transform:translateY(-3px); }
.project-card.featured{ grid-column:span 2; display:grid; grid-template-columns:auto 1fr; gap:28px; align-items:center; }
.project-icon{
  width:52px; height:52px;
  border-radius:var(--radius-sm);
  background:rgba(255,180,84,0.08);
  border:1px solid rgba(255,180,84,0.25);
  display:flex; align-items:center; justify-content:center;
  font-size:1.4rem;
  color:var(--amber);
  margin-bottom:18px;
  flex-shrink:0;
}
.project-card.featured .project-icon{ margin-bottom:0; }
.project-stack{
  font-family:var(--font-mono);
  font-size:0.72rem;
  color:var(--cyan);
  letter-spacing:0.4px;
  margin-bottom:10px;
  text-transform:uppercase;
}
.project-card h4{ font-size:1.1rem; margin-bottom:10px; }
.project-card p{ color:var(--text-dim); font-size:0.92rem; flex:1; margin-bottom:20px; }
.project-links{ display:flex; gap:12px; flex-wrap:wrap; }
.project-links a{
  display:inline-flex; align-items:center; gap:7px;
  font-family:var(--font-mono);
  font-size:0.78rem;
  color:var(--text);
  border:1px solid var(--border);
  padding:8px 14px;
  border-radius:var(--radius-sm);
  transition:all .15s;
}
.project-links a:hover{ border-color:var(--cyan); color:var(--cyan); }
.project-links a.primary{ background:var(--amber); color:#161005; border-color:var(--amber); font-weight:600; }
.project-links a.primary:hover{ background:#ffc978; color:#161005; }

.more-projects{
  margin-top:26px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  flex-wrap:wrap;
  background:var(--bg-elev);
  border:1px dashed var(--border);
  border-radius:var(--radius);
  padding:22px 28px;
}
.more-projects p{ color:var(--text-dim); font-size:0.92rem; }
.more-projects strong{ color:var(--text); display:block; font-family:var(--font-mono); font-size:0.95rem; margin-bottom:4px; }

/* =========================================================================
   Write-ups — prominent
   ========================================================================= */
#writeups{ background:var(--bg-panel); }
.writeup-banner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
  background:var(--bg-elev);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:28px 32px;
  margin-bottom:34px;
}
.writeup-banner .txt strong{ display:block; font-size:1.05rem; margin-bottom:6px; }
.writeup-banner .txt p{ color:var(--text-dim); font-size:0.92rem; max-width:520px; }

.writeup-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:22px;
}
.writeup-card{
  background:var(--bg);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:24px;
  transition:border-color .2s ease, transform .2s ease;
}
.writeup-card:hover{ border-color:var(--cyan); transform:translateY(-3px); }
.writeup-card .tag-row{ display:flex; gap:6px; flex-wrap:wrap; margin-bottom:14px; }
.writeup-card .tag{
  font-family:var(--font-mono);
  font-size:0.68rem;
  color:var(--amber);
  background:rgba(255,180,84,0.08);
  border:1px solid rgba(255,180,84,0.2);
  padding:3px 9px;
  border-radius:3px;
}
.writeup-card i.wu-icon{ font-size:1.3rem; color:var(--cyan); margin-bottom:12px; display:block; }
.writeup-card h4{ font-size:1rem; margin-bottom:8px; }
.writeup-card p{ color:var(--text-dim); font-size:0.86rem; margin-bottom:16px; }
.writeup-card a.read-more{
  font-family:var(--font-mono);
  font-size:0.78rem;
  color:var(--text);
  display:inline-flex; align-items:center; gap:6px;
}
.writeup-card a.read-more:hover{ color:var(--cyan); }

/* =========================================================================
   Services
   ========================================================================= */
.service-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:24px;
}
.service-card{
  padding:26px;
  border:1px solid var(--border);
  border-radius:var(--radius);
  background:var(--bg-panel);
}
.service-card i{ font-size:1.5rem; color:var(--amber); margin-bottom:16px; display:block; }
.service-card h4{ font-size:1.02rem; margin-bottom:10px; }
.service-card p{ color:var(--text-dim); font-size:0.9rem; }

/* =========================================================================
   Contact
   ========================================================================= */
.contact-grid{
  display:grid;
  grid-template-columns:0.85fr 1.15fr;
  gap:48px;
}
.contact-info{ display:flex; flex-direction:column; gap:20px; }
.contact-info .item{ display:flex; gap:14px; align-items:flex-start; }
.contact-info .item i{
  width:38px; height:38px;
  border-radius:var(--radius-sm);
  border:1px solid var(--border);
  display:flex; align-items:center; justify-content:center;
  color:var(--amber);
  flex-shrink:0;
}
.contact-info .item h3{ font-size:0.9rem; margin-bottom:3px; }
.contact-info .item p, .contact-info .item a{ color:var(--text-dim); font-size:0.92rem; }
.contact-info .item a:hover{ color:var(--cyan); }

.contact-social{ display:flex; gap:12px; margin-top:6px; }
.contact-social a{
  width:38px; height:38px;
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  display:flex; align-items:center; justify-content:center;
  color:var(--text-dim);
  transition:all .15s;
}
.contact-social a:hover{ border-color:var(--cyan); color:var(--cyan); }

form.contact-form{ display:flex; flex-direction:column; gap:16px; }
.form-row{ display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.contact-form label{
  font-family:var(--font-mono);
  font-size:0.72rem;
  color:var(--text-faint);
  letter-spacing:0.5px;
  text-transform:uppercase;
  margin-bottom:6px;
  display:block;
}
.contact-form input, .contact-form textarea{
  width:100%;
  background:var(--bg-panel);
  border:1px solid var(--border);
  color:var(--text);
  padding:12px 14px;
  border-radius:var(--radius-sm);
  font-family:var(--font-body);
  font-size:0.92rem;
}
.contact-form input:focus, .contact-form textarea:focus{
  outline:none;
  border-color:var(--cyan);
  box-shadow:0 0 0 3px rgba(79,195,247,0.12);
}
.contact-form textarea{ resize:vertical; min-height:130px; }
.form-status{ font-family:var(--font-mono); font-size:0.8rem; }
.form-status.ok{ color:#4ade80; }
.form-status.err{ color:#f87171; }

/* =========================================================================
   Footer
   ========================================================================= */
#footer{
  padding:28px 0;
  text-align:center;
  color:var(--text-faint);
  font-family:var(--font-mono);
  font-size:0.78rem;
}
#footer a:hover{ color:var(--cyan); }

/* Scroll to top */
#scroll-top{
  position:fixed;
  right:24px; bottom:24px;
  width:44px; height:44px;
  border-radius:50%;
  background:var(--amber);
  color:#161005;
  display:flex; align-items:center; justify-content:center;
  font-size:1.2rem;
  z-index:90;
  opacity:0;
  visibility:hidden;
  transform:translateY(8px);
  transition:all .25s ease;
}
#scroll-top.show{ opacity:1; visibility:visible; transform:translateY(0); }

/* Reveal-on-scroll */
.reveal{ opacity:0; transform:translateY(18px); transition:opacity .6s ease, transform .6s ease; }
.reveal.in{ opacity:1; transform:translateY(0); }

/* =========================================================================
   Responsive
   ========================================================================= */
@media (max-width:1080px){
  .about-grid, .contact-grid{ grid-template-columns:1fr; }
  .about-photo{ max-width:280px; }
  .skills-grid, .timeline-cols{ grid-template-columns:1fr; gap:40px; }
  .project-grid{ grid-template-columns:1fr; }
  .project-card.featured{ grid-template-columns:1fr; }
  .writeup-grid{ grid-template-columns:1fr 1fr; }
  .service-grid{ grid-template-columns:1fr 1fr; }
}

@media (max-width:900px){
  #header{
    transform:translateX(-100%);
    transition:transform .25s ease;
    width:78%;
    max-width:300px;
  }
  #header.open{ transform:translateX(0); }
  .header-toggle{ display:flex; }
  main{ margin-left:0; }
  .form-row{ grid-template-columns:1fr; }
}

@media (max-width:600px){
  section{ padding:64px 0; }
  .container{ padding:0 20px; }
  .writeup-grid, .service-grid{ grid-template-columns:1fr; }
  .fact-grid{ grid-template-columns:1fr; }
}