/* =========================================================
   Chandan Anuth — Portfolio
   Design: slate/blueprint systems console aesthetic
   Layout: full-panel scroll-snap, slide-in reveals
   ========================================================= */

:root{
  --bg:            #0a0e14;
  --bg-alt:        #0d1219;
  --panel:         #11161f;
  --panel-2:       #141b26;
  --border:        #1e2733;
  --border-soft:   #182130;
  --text:          #e8edf2;
  --text-dim:      #97a3b3;
  --text-faint:    #5b6675;
  --accent:        #4fb3ff;
  --accent-soft:   rgba(79,179,255,.12);
  --accent-2:      #e3a94d;
  --accent-2-soft: rgba(227,169,77,.12);
  --ok:            #3ecf8e;

  --font-display: "Space Grotesk", "Segoe UI", sans-serif;
  --font-body:    "Inter", "Segoe UI", sans-serif;
  --font-mono:    "JetBrains Mono", "SFMono-Regular", Consolas, monospace;

  --sidebar-w: 300px;
  --radius: 10px;
  --radius-sm: 6px;
}

*,*::before,*::after{ box-sizing:border-box; }

@media (prefers-reduced-motion: reduce){
  *{ animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; }
  html{ scroll-behavior:auto !important; }
  .scroller{ scroll-behavior:auto !important; }
}

html,body{ height:100%; }
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;
  overflow:hidden;
}

/* faint blueprint grid wash */
body::before{
  content:"";
  position:fixed; inset:0;
  background-image:
    linear-gradient(var(--border-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-soft) 1px, transparent 1px);
  background-size:64px 64px;
  opacity:.32;
  pointer-events:none;
  z-index:0;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, black 40%, transparent 85%);
}

a{ color:var(--accent); text-decoration:none; }
a:hover{ color:#8ecbff; }
h1,h2,h3,h4{ font-family:var(--font-display); font-weight:600; margin:0; letter-spacing:-.01em; }
ul{ margin:0; padding:0; list-style:none; }
img{ max-width:100%; display:block; }
:focus-visible{ outline:2px solid var(--accent); outline-offset:3px; }

.eyebrow{
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--accent);
  display:flex;
  align-items:center;
  gap:.6rem;
  margin-bottom:.9rem;
}
.eyebrow::before{ content:"//"; color:var(--text-faint); }

.skip-link{
  position:absolute; left:-999px; top:0;
  background:var(--accent); color:#00121f; padding:.6rem 1rem;
  z-index:999; border-radius:0 0 6px 0; font-family:var(--font-mono); font-size:.85rem;
}
.skip-link:focus{ left:0; }

/* ---------------- Layout shell ---------------- */
.shell{
  position:relative; z-index:1;
  display:flex;
  height:100vh;
  height:100dvh;
}

/* ---------------- Sidebar ---------------- */
.sidebar{
  width:var(--sidebar-w);
  flex-shrink:0;
  position:relative;
  border-right:1px solid var(--border);
  background:linear-gradient(180deg, var(--bg-alt), #090c11);
  padding:2.1rem 1.6rem 1.6rem;
  display:flex;
  flex-direction:column;
  overflow-y:auto;
  z-index:40;
}

.id-card{
  border:1px solid var(--border);
  background:var(--panel);
  border-radius:var(--radius);
  padding:1.4rem 1.2rem 1.2rem;
  position:relative;
}
.id-card::before,.id-card::after,
.avatar-frame::before,.avatar-frame::after{
  content:""; position:absolute; width:10px; height:10px;
  border-color:var(--accent); opacity:.75;
}
.id-card::before{ top:-1px; left:-1px; border-top:2px solid; border-left:2px solid; }
.id-card::after{ bottom:-1px; right:-1px; border-bottom:2px solid; border-right:2px solid; }

.avatar-frame{ position:relative; width:84px; height:84px; margin:0 auto .95rem; }
.avatar-frame img{
  width:100%; height:100%; object-fit:cover; border-radius:50%;
  border:1px solid var(--border); filter:saturate(.92) contrast(1.03);
}
.avatar-frame::before{ top:-6px; left:-6px; border-top:1px solid; border-left:1px solid; opacity:.55; }
.avatar-frame::after{ bottom:-6px; right:-6px; border-bottom:1px solid; border-right:1px solid; opacity:.55; }

.id-name{ text-align:center; font-size:1.28rem; }
.id-role{
  text-align:center; color:var(--text-dim); font-size:.86rem;
  margin-top:.35rem; padding-bottom:1rem; border-bottom:1px dashed var(--border);
}
.id-meta{
  display:flex; justify-content:space-between; align-items:center;
  margin-top:.9rem; font-family:var(--font-mono); font-size:.72rem; color:var(--text-faint);
}
.status-dot{
  display:inline-block; width:7px; height:7px; border-radius:50%;
  background:var(--ok); margin-right:.45rem; box-shadow:0 0 0 3px rgba(62,207,142,.15);
}
.status-pill{ color:var(--ok); }
#clock{ color:var(--text-dim); }

.side-nav{ margin-top:1.6rem; }
.side-nav li + li{ margin-top:.15rem; }
.side-nav button{
  width:100%; background:none; cursor:pointer; font-family:var(--font-body);
  display:flex; align-items:center; gap:.7rem;
  padding:.55rem .6rem; border-radius:var(--radius-sm); border:none; border-left:2px solid transparent;
  color:var(--text-dim); font-size:.87rem; font-weight:500; text-align:left;
  transition:background .15s ease, color .15s ease, border-color .15s ease;
}
.side-nav button .tag{
  font-family:var(--font-mono); font-size:.68rem; color:var(--text-faint);
  border:1px solid var(--border); border-radius:4px; padding:.1rem .35rem; min-width:2rem; text-align:center;
}
.side-nav button:hover{ color:var(--text); background:var(--panel-2); }
.side-nav button.active{ color:var(--text); background:var(--accent-soft); border-left-color:var(--accent); }
.side-nav button.active .tag{ color:var(--accent); border-color:var(--accent); }

.side-foot{ margin-top:auto; padding-top:1.5rem; }
.social-row{ display:flex; gap:.55rem; flex-wrap:wrap; }
.social-row a{
  width:2.35rem; height:2.35rem; display:flex; align-items:center; justify-content:center;
  border:1px solid var(--border); border-radius:50%; color:var(--text-dim); font-size:.95rem;
  transition:all .15s ease;
}
.social-row a:hover{ color:var(--accent); border-color:var(--accent); transform:translateY(-2px); }
.social-row a.text-link{ width:auto; padding:0 .7rem; border-radius:999px; font-family:var(--font-mono); font-size:.7rem; }

/* progress rail: shows position within the scroller */
.rail{
  margin-top:1.4rem; height:3px; border-radius:99px; background:var(--border-soft); overflow:hidden;
}
.rail-fill{ height:100%; width:0%; background:linear-gradient(90deg, var(--accent), var(--accent-2)); transition:width .2s ease; }

/* mobile top bar */
.topbar{
  display:none;
  position:fixed; top:0; left:0; right:0; z-index:50;
  background:rgba(10,14,20,.92); backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
  padding:.8rem 1rem;
  align-items:center; justify-content:space-between;
}
.topbar .brand{ display:flex; align-items:center; gap:.6rem; font-family:var(--font-display); font-weight:600; }
.topbar .brand img{ width:34px; height:34px; border-radius:50%; object-fit:cover; }
.menu-btn{
  background:none; border:1px solid var(--border); border-radius:6px;
  width:38px; height:38px; color:var(--text); font-size:1.1rem; cursor:pointer;
}

/* ---------------- Scroller / panels ---------------- */
.scroller{
  flex:1; min-width:0; position:relative; z-index:1;
  height:100vh; height:100dvh;
  overflow-y:scroll;
  scroll-snap-type: y proximity;
  scroll-behavior:smooth;
}
.panel{
  min-height:100vh; min-height:100dvh;
  scroll-snap-align:start;
  display:flex; flex-direction:column; justify-content:center;
  padding:5.4rem clamp(1.4rem, 4vw, 3rem) 4rem;
  border-bottom:1px solid var(--border-soft);
  position:relative;
}
.panel-inner{ width:100%; max-width:860px; margin:0 auto; }
.panel:last-of-type{ border-bottom:none; }
.panel h2{ font-size:1.9rem; margin-bottom:2rem; }

/* slide-in reveal primitives */
.rL,.rR,.rU{ opacity:0; transition:opacity .7s cubic-bezier(.16,.8,.3,1), transform .7s cubic-bezier(.16,.8,.3,1); }
.rL{ transform:translateX(-42px); }
.rR{ transform:translateX(42px); }
.rU{ transform:translateY(28px); }
.panel.active .rL,.panel.active .rR,.panel.active .rU{ opacity:1; transform:none; }
.panel.active .stagger > *{ transition-delay:calc(var(--i, 0) * 70ms); }

/* ---------------- Hero ---------------- */
.hero{ padding-top:6rem; }
#hero-canvas{ position:absolute; inset:0; width:100%; height:100%; z-index:0; opacity:.55; }
.hero .panel-inner{ position:relative; z-index:1; }
.hero h1{
  font-size:clamp(2.6rem, 5.6vw, 4.3rem); line-height:1.03;
  background:linear-gradient(100deg, #f2f6fa 20%, var(--accent) 65%, var(--accent-2) 100%);
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.hero .role{ margin-top:.9rem; font-size:1.2rem; color:var(--text-dim); font-weight:500; }
.hero .lede{ margin-top:1.4rem; max-width:56ch; color:var(--text-dim); font-size:1.02rem; }
.hero .lede a{ border-bottom:1px dotted var(--accent); }
.hero-ctas{ display:flex; gap:.8rem; margin-top:2.1rem; flex-wrap:wrap; }
.btn{
  font-family:var(--font-mono); font-size:.82rem; font-weight:500;
  padding:.75rem 1.3rem; border-radius:var(--radius-sm); border:1px solid var(--border); color:var(--text);
  display:inline-flex; align-items:center; gap:.5rem; cursor:pointer; background:none;
  transition:all .15s ease;
}
.btn:hover{ color:var(--text); }
.btn-primary{ background:var(--accent); border-color:var(--accent); color:#00131f; }
.btn-primary:hover{ background:#6cc0ff; color:#00131f; }
.btn-ghost:hover{ border-color:var(--accent); background:var(--accent-soft); }

.stat-strip{ display:flex; gap:2.4rem; margin-top:3.2rem; flex-wrap:wrap; padding-top:2rem; border-top:1px solid var(--border-soft); }
.stat-strip .stat b{ display:block; font-family:var(--font-display); font-size:1.7rem; color:var(--text); }
.stat-strip .stat span{ font-size:.8rem; color:var(--text-faint); font-family:var(--font-mono); }
.scroll-cue{
  position:absolute; bottom:1.6rem; left:50%; transform:translateX(-50%);
  font-family:var(--font-mono); font-size:.68rem; color:var(--text-faint);
  display:flex; flex-direction:column; align-items:center; gap:.4rem; z-index:1;
}
.scroll-cue i{ animation:bob 1.8s ease-in-out infinite; }
@keyframes bob{ 0%,100%{ transform:translateY(0); } 50%{ transform:translateY(5px); } }

/* ---------------- Experience timeline ---------------- */
.timeline{ position:relative; padding-left:1.9rem; }
.timeline::before{
  content:""; position:absolute; left:5px; top:.4rem; bottom:.4rem; width:1px;
  background:linear-gradient(var(--border), var(--border) 92%, transparent);
}
.t-item{ position:relative; padding-bottom:2.6rem; }
.t-item:last-child{ padding-bottom:0; }
.t-item::before{
  content:""; position:absolute; left:-1.9rem; top:.35rem; width:11px; height:11px; border-radius:50%;
  background:var(--bg); border:2px solid var(--accent);
}
.t-item.current::before{ background:var(--accent); box-shadow:0 0 0 4px var(--accent-soft); }
.t-head{ display:flex; justify-content:space-between; align-items:baseline; gap:1rem; flex-wrap:wrap; }
.t-role{ font-size:1.15rem; font-weight:600; font-family:var(--font-display); }
.t-org{ color:var(--accent-2); font-size:.9rem; margin-top:.15rem; }
.t-date{
  font-family:var(--font-mono); font-size:.75rem; color:var(--text-faint); white-space:nowrap;
  border:1px solid var(--border); border-radius:999px; padding:.25rem .7rem;
}
.t-summary{ margin-top:.7rem; color:var(--text-dim); font-size:.95rem; }
.t-details{ margin-top:.8rem; }
.t-details li{ position:relative; padding-left:1.1rem; color:var(--text-dim); font-size:.92rem; margin-top:.45rem; }
.t-details li::before{ content:"›"; position:absolute; left:0; color:var(--accent); }
.t-stack{ margin-top:.9rem; font-size:.78rem; color:var(--text-faint); }
.t-stack b{ color:var(--text-dim); font-weight:500; }

/* ---------------- Education ---------------- */
.edu-card{
  display:flex; justify-content:space-between; align-items:baseline; gap:1rem; flex-wrap:wrap;
  padding:1.3rem 1.4rem; border:1px solid var(--border); border-radius:var(--radius); background:var(--panel);
}
.edu-card h3{ font-size:1.05rem; }
.edu-card p{ margin:.3rem 0 0; color:var(--text-dim); font-size:.9rem; }

/* ---------------- Skills ---------------- */
.skill-groups{ display:grid; gap:1.6rem; }
.skill-group h4{
  font-family:var(--font-mono); font-size:.72rem; letter-spacing:.1em; text-transform:uppercase;
  color:var(--text-faint); margin-bottom:.75rem; font-weight:500;
}
.chip-row{ display:flex; flex-wrap:wrap; gap:.55rem; }
.chip{
  font-size:.85rem; padding:.42rem .85rem; border:1px solid var(--border); border-radius:999px;
  color:var(--text-dim); background:var(--panel); transition:all .15s ease;
}
.chip:hover{ border-color:var(--accent); color:var(--text); background:var(--accent-soft); }

.cert-heading{ margin-top:3.2rem; }
.cert-grid{ display:grid; grid-template-columns:repeat(auto-fill, minmax(120px,1fr)); gap:1rem; margin-top:1.4rem; }
.cert-card{
  border:1px solid var(--border); border-radius:var(--radius); background:var(--panel);
  padding:1rem .8rem; display:flex; flex-direction:column; align-items:center; text-align:center; gap:.6rem;
  transition:transform .15s ease, border-color .15s ease;
}
.cert-card:hover{ transform:translateY(-3px); border-color:var(--accent-2); }
.cert-card img{ height:56px; width:auto; object-fit:contain; }
.cert-card span{ font-size:.72rem; color:var(--text-faint); line-height:1.35; }

.lang-heading{ margin-top:3.2rem; }
.lang-table{ width:100%; border-collapse:collapse; margin-top:1.2rem; font-size:.92rem; }
.lang-table th{
  text-align:left; font-family:var(--font-mono); font-size:.7rem; text-transform:uppercase; letter-spacing:.08em;
  color:var(--text-faint); padding-bottom:.6rem; border-bottom:1px solid var(--border); font-weight:500;
}
.lang-table td{ padding:.65rem 0; border-bottom:1px solid var(--border-soft); color:var(--text-dim); }
.lang-table td:first-child{ color:var(--text); }

/* ---------------- Courses accordion ---------------- */
.hint{ color:var(--text-faint); font-size:.85rem; margin-top:-1.3rem; margin-bottom:1.6rem; display:block; }
.acc-item{ border:1px solid var(--border); border-radius:var(--radius); background:var(--panel); margin-bottom:.7rem; overflow:hidden; }
.acc-trigger{
  width:100%; display:flex; justify-content:space-between; align-items:center; gap:1rem;
  background:none; border:none; color:var(--text); text-align:left; cursor:pointer;
  padding:1rem 1.2rem; font-size:.95rem; font-weight:500; font-family:var(--font-body);
}
.acc-trigger .t-date{ margin-left:auto; }
.acc-trigger .chevron{ transition:transform .2s ease; color:var(--text-faint); flex-shrink:0; }
.acc-item.open .chevron{ transform:rotate(180deg); }
.acc-panel{ max-height:0; overflow:hidden; transition:max-height .3s cubic-bezier(.16,.8,.3,1); }
.acc-item.open .acc-panel{ max-height:220px; }
.acc-inner{ padding:0 1.2rem 1.1rem; color:var(--text-dim); font-size:.9rem; }
.acc-inner img{ margin-top:.6rem; height:26px; }

/* ---------------- Portfolio slider ---------------- */
.pf-count{ font-family:var(--font-mono); font-size:.8rem; color:var(--text-faint); margin-bottom:1.2rem; }
.pf-viewport{ overflow:hidden; border-radius:var(--radius); touch-action:pan-y; }
.pf-track{ display:flex; transition:transform .5s cubic-bezier(.16,.8,.3,1); will-change:transform; }
.pf-card{
  flex:0 0 100%; border:1px solid var(--border); background:var(--panel); border-radius:var(--radius);
  padding:1.8rem 1.9rem; min-height:1px;
}
.pf-top{ display:flex; justify-content:space-between; align-items:flex-start; gap:1rem; flex-wrap:wrap; }
.pf-num{ font-family:var(--font-mono); font-size:.75rem; color:var(--accent); }
.pf-tag{
  font-family:var(--font-mono); font-size:.68rem; color:var(--accent-2); border:1px solid var(--border);
  border-radius:999px; padding:.2rem .6rem; white-space:nowrap;
}
.pf-card h3{ font-size:1.25rem; margin-top:.5rem; }
.pf-org{ color:var(--text-dim); font-size:.85rem; margin-top:.3rem; font-family:var(--font-mono); }
.pf-grid{ display:grid; grid-template-columns:1fr 1fr; gap:1.4rem; margin-top:1.4rem; }
.pf-block h4{
  font-family:var(--font-mono); font-size:.68rem; text-transform:uppercase; letter-spacing:.08em;
  color:var(--text-faint); margin-bottom:.55rem;
}
.pf-block ul li{ position:relative; padding-left:1rem; color:var(--text-dim); font-size:.88rem; margin-top:.4rem; }
.pf-block ul li::before{ content:"–"; position:absolute; left:0; color:var(--text-faint); }
.pf-block.result h4{ color:var(--ok); }
.pf-block.result ul li::before{ content:"✓"; color:var(--ok); font-size:.75rem; }

.pf-controls{ display:flex; align-items:center; gap:1rem; margin-top:1.5rem; }
.pf-arrow{
  width:2.6rem; height:2.6rem; border-radius:50%; border:1px solid var(--border); background:var(--panel);
  color:var(--text); cursor:pointer; display:flex; align-items:center; justify-content:center; transition:all .15s ease;
}
.pf-arrow:hover{ border-color:var(--accent); color:var(--accent); }
.pf-arrow:disabled{ opacity:.35; cursor:default; }
.pf-dots{ display:flex; gap:.5rem; flex:1; flex-wrap:wrap; }
.pf-dots button{
  width:8px; height:8px; border-radius:50%; border:none; background:var(--border); cursor:pointer; padding:0;
  transition:all .2s ease;
}
.pf-dots button.active{ background:var(--accent); width:22px; border-radius:5px; }

/* ---------------- Interests ---------------- */
.interest-grid{ display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); gap:1rem; }
.interest-card{ border:1px solid var(--border); border-radius:var(--radius); background:var(--panel); padding:1.2rem 1.3rem; }
.interest-card h4{ font-size:1rem; margin-bottom:.5rem; }
.interest-card p{ color:var(--text-dim); font-size:.88rem; margin:0; }

/* ---------------- Contact panel ---------------- */
.contact-grid{ display:flex; flex-wrap:wrap; gap:.9rem; margin-top:1.8rem; }
.contact-card{
  display:flex; align-items:center; gap:.8rem; border:1px solid var(--border); border-radius:var(--radius);
  background:var(--panel); padding:1rem 1.3rem; color:var(--text); font-size:.92rem; transition:all .15s ease; flex:1 1 220px;
}
.contact-card:hover{ border-color:var(--accent); background:var(--accent-soft); color:var(--text); }
.contact-card i{ color:var(--accent); font-size:1.05rem; }
.site-footer{
  margin-top:2.6rem; padding-top:1.6rem; border-top:1px solid var(--border-soft);
  color:var(--text-faint); font-size:.8rem; font-family:var(--font-mono);
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:.6rem;
}

/* ---------------- Responsive ---------------- */
@media (max-width:991px){
  :root{ --sidebar-w:0px; }
  .shell{ display:block; height:auto; }
  .sidebar{
    position:fixed; top:60px; left:0; bottom:0; transform:translateX(-100%);
    transition:transform .25s ease; width:280px; box-shadow:0 10px 40px rgba(0,0,0,.5);
  }
  .sidebar.open{ transform:translateX(0); }
  .scroller{ height:calc(100vh - 60px); height:calc(100dvh - 60px); margin-top:60px; }
  .topbar{ display:flex; }
  .panel{ padding:3.4rem clamp(1.2rem,6vw,2rem) 2.8rem; min-height:auto; }
  .hero{ min-height:calc(100vh - 60px); min-height:calc(100dvh - 60px); padding-top:2rem; }
  .stat-strip{ gap:1.6rem; }
  .pf-grid{ grid-template-columns:1fr; }
  .scrim{ display:none; position:fixed; inset:0; top:60px; background:rgba(0,0,0,.5); z-index:39; }
  .scrim.show{ display:block; }
}

@media (min-width:992px) and (max-width:1240px){
  :root{ --sidebar-w:264px; }
  .panel-inner{ max-width:740px; }
}

@media (max-width:767px){
  .hero{ padding-top:1.6rem; }
  .hero h1{ font-size:clamp(2.1rem, 9vw, 2.8rem); }
  .stat-strip{ gap:1.4rem 2rem; margin-top:2.4rem; padding-top:1.6rem; }
  .panel h2{ font-size:1.6rem; margin-bottom:1.5rem; }
  .id-card{ max-width:320px; margin:0 auto; }
}

@media (max-width:560px){
  .t-head{ flex-direction:column; align-items:flex-start; }
  .cert-grid{ grid-template-columns:repeat(auto-fill,minmax(100px,1fr)); }
  .hero-ctas{ flex-direction:column; align-items:stretch; }
  .hero-ctas .btn{ justify-content:center; }
  .site-footer{ flex-direction:column; align-items:flex-start; gap:.6rem; }
  .contact-card{ flex:1 1 100%; }
}