/* =========================================================
   AKASH BAMBHANIYA — PORTFOLIO
   Tokens
========================================================= */
/* Fonts are self-hosted (variable, Latin subset): no third-party requests,
   and each family is one file instead of one per weight. */
@font-face{
  font-family:'Space Grotesk';
  font-style:normal;
  font-weight:300 700;
  font-display:swap;
  src:url(fonts/space-grotesk-latin-wght-normal.woff2) format('woff2');
}
@font-face{
  font-family:'Inter';
  font-style:normal;
  font-weight:100 900;
  font-display:swap;
  src:url(fonts/inter-latin-wght-normal.woff2) format('woff2');
}
@font-face{
  font-family:'JetBrains Mono';
  font-style:normal;
  font-weight:100 800;
  font-display:swap;
  src:url(fonts/jetbrains-mono-latin-wght-normal.woff2) format('woff2');
}

:root{
  /* color */
  --bg:            #07080d;
  --bg-raised:     #0c0e16;
  --surface:       rgba(255,255,255,0.045);
  --surface-hi:    rgba(255,255,255,0.08);
  --border:        rgba(255,255,255,0.09);
  --border-hi:     rgba(255,255,255,0.16);
  --grid-line:     rgba(255,255,255,0.045);
  --glow-opacity:  0.35;
  --header-bg:     rgba(10,12,20,0.55);
  --menu-bg:       rgba(7,8,13,0.97);
  --terminal-bg:   rgba(13,15,24,0.65);
  --shadow-strong: rgba(0,0,0,0.6);
  --btn-text:      #04120f;
  --cyan-2:        #6be3d4;
  color-scheme:    dark;

  --cyan:          #35e6d1;
  --violet:        #9b6bff;

  --text:          #eef1f8;
  --text-muted:    #8890a4;
  --text-dim:      #7b8299;

  /* type */
  --font-head: 'Space Grotesk', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* layout */
  --maxw: 1180px;
  --gutter: clamp(1.25rem, 5vw, 3rem);
  --radius-lg: 20px;
  --radius-md: 12px;
  --radius-sm: 8px;

  --ease: cubic-bezier(.22,1,.36,1);

  /* Soft tints and glow strengths, derived from --cyan / --violet
     with color-mix() rather than separate hard-coded rgba values —
     change the two hex values above and every glow/tint follows. */
  --cyan-soft:     color-mix(in srgb, var(--cyan) 14%, transparent);
  --violet-soft:   color-mix(in srgb, var(--violet) 16%, transparent);
  --cyan-glow-edge:color-mix(in srgb, var(--cyan) 65%, transparent);
  --cyan-glow-hi:  color-mix(in srgb, var(--cyan) 30%, transparent);
  --cyan-glow-lo:  color-mix(in srgb, var(--cyan) 12%, transparent);
}

/* =========================================================
   Light theme — only the tokens change; every component reads
   them, so nothing else needs a light-mode override.
   (theme.js sets data-theme="light" on <html>.)
========================================================= */
:root[data-theme="light"]{
  --bg:            #f4f6fb;
  --bg-raised:     #ffffff;
  --surface:       rgba(255,255,255,0.75);
  --surface-hi:    #ffffff;
  --border:        rgba(18,23,38,0.10);
  --border-hi:     rgba(18,23,38,0.18);
  --grid-line:     rgba(18,23,38,0.06);
  --glow-opacity:  0.16;
  --header-bg:     rgba(255,255,255,0.72);
  --menu-bg:       #ffffff;
  --shadow-strong: rgba(30,40,80,0.16);
  --btn-text:      #ffffff;
  --cyan-2:        #0b8a7f;

  /* Accents darkened so they stay readable as text on a light page */
  --cyan:          #0a7f75;
  --violet:        #6a3fd8;

  --text:          #121726;
  --text-muted:    #454d63;
  --text-dim:      #636b81;
  color-scheme:    light;
}
/* The hero code window stays dark in both themes (like a real editor),
   so give it the dark palette back inside light mode. */
:root[data-theme="light"] .terminal{
  --terminal-bg:   rgba(13,15,24,0.94);
  --text:          #eef1f8;
  --text-muted:    #8890a4;
  --text-dim:      #7b8299;
  --cyan:          #35e6d1;
  --violet:        #9b6bff;
  --border:        rgba(255,255,255,0.09);
  --border-hi:     rgba(255,255,255,0.16);
}

*,*::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(--font-body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  transition:background-color .35s ease, color .35s ease;
}

a{ color:inherit; text-decoration:none; }
ul{ list-style:none; margin:0; padding:0; }
h1,h2,h3{ font-family:var(--font-head); margin:0; letter-spacing:-0.01em; }
p{ margin:0; }

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:4px;
}

/* Selection is left ON everywhere by default — this is a portfolio,
   people should be able to select and copy bio text and
   contact details.
   It's turned OFF only on interface chrome: things a visitor clicks
   or drags across rather than reads, where an accidental text
   highlight looks broken rather than useful. */
.site-header,
.btn,
.badge,
.scroll-cue,
.service-icon,
.chip-mono,
.timeline-node,
.stat-label{
  user-select:none;
  -webkit-user-select:none;
}

/* =========================================================
   Skip link — invisible until a keyboard user tabs to it,
   then jumps straight to <main>, past the header/nav.
========================================================= */
.skip-link{
  position:absolute;
  top:-100px;
  left:12px;
  z-index:1000;
  padding:10px 18px;
  background:var(--bg-raised);
  color:var(--text);
  border:1px solid var(--cyan);
  border-radius:var(--radius-sm);
  font-family:var(--font-mono);
  font-size:0.85rem;
  transition:top .2s var(--ease);
}
.skip-link:focus{
  top:12px;
}

/* =========================================================
   Background layer — grid + glows
========================================================= */
.bg-layer{
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  overflow:hidden;
}
.bg-grid{
  position:absolute;
  inset:-2px;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse 70% 60% at 50% 0%, #000 40%, transparent 85%);
  animation:grid-drift 50s linear infinite;
}
@keyframes grid-drift{
  from{ background-position:0 0, 0 0; }
  to{ background-position:64px 64px, 64px 64px; }
}
.bg-glow{
  position:absolute;
  border-radius:50%;
  filter:blur(110px);
  opacity:var(--glow-opacity);
}
.bg-glow--cyan{
  width:520px; height:520px;
  top:-160px; left:-120px;
  background:var(--cyan);
}
.bg-glow--violet{
  width:560px; height:560px;
  top:60px; right:-200px;
  background:var(--violet);
  opacity:calc(var(--glow-opacity) - 0.07);
}

/* =========================================================
   Header
========================================================= */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  padding:14px var(--gutter) 0;
}
.header-inner{
  max-width:var(--maxw);
  margin:0 auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:12px 20px;
  border:1px solid var(--border);
  border-radius:var(--radius-md);
  background:var(--header-bg);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
}

.logo{
  font-family:var(--font-head);
  font-weight:700;
  font-size:1.25rem;
  color:var(--text);
}
.logo-dot{ color:var(--cyan); }

.main-nav{
  display:flex;
  align-items:center;
  gap:2rem;
}
.nav-link{
  white-space:nowrap;
  font-size:0.92rem;
  color:var(--text-muted);
  position:relative;
  padding:4px 0;
  transition:color .25s var(--ease);
}
.nav-link:hover{ color:var(--text); }
.nav-link::after{
  content:'';
  position:absolute;
  left:0; bottom:-2px;
  width:0; height:1px;
  background:var(--cyan);
  transition:width .25s var(--ease);
}
.nav-link:hover::after{ width:100%; }

.nav-link--cta{
  color:var(--text);
  padding:8px 16px;
  border:1px solid var(--border-hi);
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:0.8rem;
}
.nav-link--cta::after{ display:none; }
.nav-link--cta:hover{
  border-color:var(--cyan);
  box-shadow:0 0 18px var(--cyan-soft);
}

@media (min-width: 761px){
  .main-nav{ margin-left:auto; }
}

/* Theme switcher: shows the sun in dark mode (click → light) and the
   moon in light mode (click → dark). */
.theme-toggle{
  display:flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
  width:40px; height:40px;
  margin-left:1.25rem;
  padding:0;
  border:1px solid var(--border-hi);
  border-radius:50%;
  background:var(--surface);
  color:var(--text);
  cursor:pointer;
  transition:border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.theme-toggle:hover{
  border-color:var(--cyan);
  box-shadow:0 0 18px var(--cyan-soft);
}
.theme-toggle svg{ width:19px; height:19px; }

/* Visually hidden, still read by screen readers */
.sr-only{
  position:absolute;
  width:1px; height:1px;
  margin:-1px; padding:0;
  overflow:hidden;
  clip:rect(0,0,0,0);
  white-space:nowrap;
  border:0;
}
.theme-toggle .icon-moon{ display:none; }
:root[data-theme="light"] .theme-toggle .icon-sun{ display:none; }
:root[data-theme="light"] .theme-toggle .icon-moon{ display:block; }

.nav-toggle{
  display:none;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:36px; height:36px;
  background:none;
  border:none;
  cursor:pointer;
  padding:0;
}
.nav-toggle span{
  display:block;
  width:100%;
  height:2px;
  background:var(--text);
  border-radius:2px;
  transition:transform .25s var(--ease), opacity .25s var(--ease);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2){ opacity:0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }

/* =========================================================
   Hero
========================================================= */
.hero{
  position:relative;
  z-index:1;
  max-width:var(--maxw);
  margin:0 auto;
  padding:clamp(3rem,8vw,6.5rem) var(--gutter) 4rem;
}
.hero-inner{
  display:grid;
  grid-template-columns:1.1fr 0.9fr;
  gap:clamp(2rem,5vw,4rem);
  align-items:center;
}

.badge{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:0.78rem;
  letter-spacing:0.06em;
  color:var(--cyan);
  padding:7px 14px;
  border:1px solid var(--border-hi);
  border-radius:999px;
  background:var(--cyan-soft);
  margin-bottom:1.75rem;
}
.badge-dot{
  position:relative;
  width:6px; height:6px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 8px 2px var(--cyan);
  animation:pulse 2s ease-in-out infinite;
}
.badge-dot::before{
  content:'';
  position:absolute;
  inset:-5px;
  border-radius:50%;
  border:1px solid var(--cyan);
  opacity:0.8;
  animation:radar-ping 2.4s ease-out infinite;
}
@keyframes radar-ping{
  0%{ transform:scale(0.5); opacity:0.7; }
  100%{ transform:scale(2.6); opacity:0; }
}
@keyframes pulse{
  0%,100%{ opacity:1; transform:scale(1); }
  50%{ opacity:0.5; transform:scale(0.75); }
}

.hero-title{
  font-size:clamp(2.4rem, 6vw, 4rem);
  font-weight:600;
  line-height:1.08;
  color:var(--text-muted);
}
.hero-title-sub{
  display:block;
  margin-top:1rem;
  font-size:clamp(1.2rem, 2.6vw, 1.65rem);
  font-weight:500;
  line-height:1.3;
  letter-spacing:-0.005em;
  color:var(--text-muted);
}
.hero-title-name{
  color:var(--text);
  background:linear-gradient(100deg, var(--text) 40%, var(--cyan) 70%, var(--violet) 100%);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}

.hero-desc{
  margin-top:1.5rem;
  max-width:30rem;
  color:var(--text-muted);
  font-size:1.02rem;
}

.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:1rem;
  margin-top:2.5rem;
}

.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:14px 26px;
  border-radius:var(--radius-sm);
  font-family:var(--font-mono);
  font-size:0.88rem;
  font-weight:500;
  transition:transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
}
.btn--primary{
  color:var(--btn-text);
  background:linear-gradient(135deg, var(--cyan), var(--cyan-2));
  box-shadow:0 0 0 1px color-mix(in srgb, var(--cyan) 40%, transparent), 0 12px 30px -10px color-mix(in srgb, var(--cyan) 55%, transparent);
}
.btn--primary:hover{
  transform:translateY(-2px);
  box-shadow:0 0 0 1px var(--cyan-glow-edge), 0 18px 44px -10px color-mix(in srgb, var(--cyan) 50%, transparent);
}
.btn--ghost{
  color:var(--text);
  border:1px solid var(--border-hi);
  background:var(--surface);
}
.btn--ghost:hover{
  border-color:var(--violet);
  box-shadow:0 0 24px var(--violet-soft);
  transform:translateY(-2px);
}
.btn-caret{ color:var(--violet); }

/* --- terminal card --- */
.hero-visual{ display:flex; justify-content:center; }
.terminal{
  position:relative;
  width:100%;
  max-width:420px;
  border-radius:var(--radius-md);
  border:1px solid var(--border-hi);
  background:var(--terminal-bg);
  backdrop-filter:blur(20px) saturate(150%);
  -webkit-backdrop-filter:blur(20px) saturate(150%);
  overflow:hidden;
  animation:terminal-hum 6s ease-in-out infinite;
}
@keyframes terminal-hum{
  0%,100%{
    box-shadow:
      0 0 0 1px rgba(255,255,255,0.03),
      0 30px 60px -20px var(--shadow-strong),
      0 0 60px -20px var(--cyan-soft);
  }
  50%{
    box-shadow:
      0 0 0 1px color-mix(in srgb, var(--cyan) 22%, transparent),
      0 30px 60px -20px var(--shadow-strong),
      0 0 80px -14px var(--cyan-soft);
  }
}
/* Scanning sweep — reads the terminal like a live HUD panel rather
   than a static screenshot. One bold moment, contained to this
   single element rather than scattered across the page. */
.terminal::after{
  content:'';
  position:absolute;
  left:0; right:0;
  top:-45%;
  height:45%;
  background:linear-gradient(180deg,
    transparent,
    color-mix(in srgb, var(--cyan) 9%, transparent) 50%,
    transparent);
  mix-blend-mode:screen;
  pointer-events:none;
  animation:scan-sweep 6s linear infinite;
}
@keyframes scan-sweep{
  0%{ top:-45%; }
  60%{ top:100%; }
  100%{ top:100%; }
}
.terminal-bar{
  display:flex;
  align-items:center;
  gap:8px;
  padding:12px 16px;
  border-bottom:1px solid var(--border);
  background:rgba(255,255,255,0.02);
}
.terminal-dot{ width:9px; height:9px; border-radius:50%; opacity:0.85; }
.terminal-dot--r{ background:#ff5f57; }
.terminal-dot--y{ background:#febc2e; }
.terminal-dot--g{ background:#28c840; }
.terminal-name{
  margin-left:8px;
  font-family:var(--font-mono);
  font-size:0.75rem;
  color:var(--text-dim);
}
.terminal-body{ padding:22px 20px; }
.terminal-body pre{ margin:0; }
.terminal-body code{
  font-family:var(--font-mono);
  font-size:0.85rem;
  line-height:1.85;
  color:var(--text-muted);
  white-space:pre;
}
.tok-key{ color:var(--violet); }
.tok-var{ color:var(--text); }
.tok-prop{ color:#8fb8ff; }
.tok-str{ color:var(--cyan); }
.tok-num{ color:#ffb454; }
.cursor{
  display:inline-block;
  width:7px; height:1em;
  background:var(--cyan);
  vertical-align:text-bottom;
  animation:blink 1s step-end infinite;
}
@keyframes blink{ 50%{ opacity:0; } }

/* --- scroll cue --- */
.scroll-cue{
  display:flex;
  justify-content:center;
  margin-top:clamp(2.5rem,6vw,4.5rem);
}
.scroll-cue span{
  display:block;
  width:1px; height:38px;
  background:linear-gradient(var(--cyan), transparent);
  position:relative;
}
.scroll-cue span::after{
  content:'';
  position:absolute;
  top:0; left:50%;
  width:5px; height:5px;
  background:var(--cyan);
  border-radius:50%;
  box-shadow:0 0 8px 2px var(--cyan);
  transform:translateX(-50%);
  animation:travel 1.8s ease-in-out infinite;
}
@keyframes travel{
  0%{ top:0; opacity:1; }
  90%{ opacity:1; }
  100%{ top:100%; opacity:0; }
}

/* =========================================================
   Stats
========================================================= */
.stats{
  position:relative;
  z-index:1;
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 var(--gutter) clamp(4rem,8vw,6rem);
}
.stats-inner{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:1.25rem;
  border-top:1px solid var(--border);
  padding-top:2.5rem;
}
.stat-card{
  padding:1.75rem 1.5rem;
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  background:var(--surface);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  text-align:left;
  transition:border-color .3s var(--ease), transform .3s var(--ease);
}
.stat-card:hover{
  border-color:var(--cyan);
  transform:translateY(-3px);
  box-shadow:
    0 0 0 1px var(--cyan-glow-edge),
    0 0 20px 2px color-mix(in srgb, var(--cyan) 30%, transparent),
    0 0 46px 4px color-mix(in srgb, var(--cyan) 12%, transparent);
}
.stat-number{
  font-family:var(--font-head);
  font-size:clamp(2.2rem, 5vw, 3rem);
  font-weight:700;
  color:var(--text);
  line-height:1;
}
.stat-card:nth-child(1) .stat-number{ text-shadow:0 0 24px var(--cyan-soft); }
.stat-card:nth-child(2) .stat-number{ text-shadow:0 0 24px var(--violet-soft); }
.stat-card:nth-child(3) .stat-number{ text-shadow:0 0 24px var(--cyan-soft); }

.stat-label{
  margin-top:0.5rem;
  font-family:var(--font-mono);
  font-size:0.82rem;
  color:var(--text-muted);
}

/* =========================================================
   Responsive
========================================================= */
@media (max-width: 900px){
  .hero-inner{
    grid-template-columns:1fr;
  }
  .hero-visual{ order:-1; }
  .terminal{ max-width:480px; }
}

@media (max-width: 1024px){
  .main-nav{ gap:1.25rem; }
}

@media (max-width: 760px){
  .main-nav{
    position:absolute;
    top:calc(100% + 10px);
    left:0; right:0;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:10px;
    border:1px solid var(--border-hi);
    border-radius:var(--radius-md);
    /* Solid first, frosted second: the fill alone (0.97 opacity) is
       dark enough to fully hide whatever's behind it — hero text, the
       terminal, the particle canvas — even on browsers that don't
       support backdrop-filter. Where it IS supported, the blur just
       adds a bit of extra frosted-glass polish on top of that solid
       base, rather than being the only thing doing the hiding. */
    background:var(--menu-bg);
    backdrop-filter:blur(28px) saturate(160%);
    -webkit-backdrop-filter:blur(28px) saturate(160%);
    box-shadow:0 20px 50px -20px var(--shadow-strong);
    /* Slide-in: the panel starts slightly above its resting spot and
       fades in, instead of scaling up from zero height. */
    transform:translateY(-14px);
    opacity:0;
    pointer-events:none;
    transition:transform .3s var(--ease), opacity .25s var(--ease);
  }
  .main-nav.is-open{
    transform:translateY(0);
    opacity:1;
    pointer-events:auto;
  }
  .nav-link{ padding:12px 10px; }
  .nav-link::after{ display:none; }
  .nav-link--cta{ margin-top:6px; text-align:center; }
  .nav-toggle{ display:flex; }
  .theme-toggle{ margin-left:auto; margin-right:10px; }

  .stats-inner{ grid-template-columns:1fr; }
}

@media (max-width: 480px){
  .hero-actions{ flex-direction:column; align-items:stretch; }
  .btn{ justify-content:center; }
  .terminal-body{ padding:18px 14px; }
  .terminal-body code{ font-size:0.78rem; }
}

/* =========================================================
   Shared section shell
========================================================= */
.section{
  position:relative;
  z-index:1;
}
.section-inner{
  max-width:var(--maxw);
  margin:0 auto;
  padding:clamp(3.5rem,8vw,6rem) var(--gutter);
  border-top:1px solid var(--border);
}

.section-head{ max-width:100%; width:100%; margin-bottom:clamp(2.25rem,5vw,3.5rem); }
.section-tag{
  font-family:var(--font-mono);
  font-size:0.8rem;
  color:var(--cyan);
  margin-bottom:0.75rem;
}
.section-title{
  font-size:clamp(1.6rem, 3.4vw, 2.35rem);
  font-weight:600;
  color:var(--text);
  line-height:1.3;
}
.section-sub{
  margin-top:0.85rem;
  max-width:38rem;
  color:var(--text-muted);
  font-size:1rem;
  line-height:1.6;
}

/* =========================================================
   About
========================================================= */
.about-grid{
  display:grid;
  grid-template-columns:0.85fr 1.15fr;
  gap:clamp(2rem,5vw,4rem);
  align-items:start;
}
.about-body{ padding-top:0.35rem; }
.about-text{
  color:var(--text-muted);
  max-width:33rem;
  font-size:1.02rem;
}
.about-text + .about-text{ margin-top:1rem; }
.about-list{
  margin-top:2rem;
  display:flex;
  flex-direction:column;
  gap:1.1rem;
}
.about-list-item{
  display:flex;
  flex-direction:column;
  gap:0.2rem;
  padding-left:1.1rem;
  border-left:2px solid var(--border-hi);
}
.about-list-key{
  font-family:var(--font-mono);
  font-size:0.88rem;
  color:var(--text);
}
.about-list-desc{
  font-size:0.92rem;
  color:var(--text-muted);
}

/* =========================================================
   Experience timeline
========================================================= */
.timeline{
  position:relative;
  margin:0;
  padding:0 0 0 28px;
  list-style:none;
}
.timeline::before{
  content:'';
  position:absolute;
  left:5px; top:6px; bottom:6px;
  width:1px;
  background:linear-gradient(var(--cyan), var(--violet));
  opacity:0.5;
}
.timeline-item{
  position:relative;
  padding-bottom:2.5rem;
}
.timeline-item:last-child{ padding-bottom:0; }
.timeline-node{
  position:absolute;
  left:-28px; top:6px;
  width:11px; height:11px;
  border-radius:50%;
  background:var(--bg);
  border:2px solid var(--cyan);
  box-shadow:0 0 0 4px color-mix(in srgb, var(--cyan) 8%, transparent);
}
.timeline-item--current .timeline-node{
  border-color:var(--violet);
  box-shadow:0 0 0 4px var(--violet-soft), 0 0 14px 2px var(--violet);
  animation:pulse 2s ease-in-out infinite;
}
.timeline-card{
  padding:1.5rem 1.75rem;
  border:1px solid var(--border);
  border-radius:var(--radius-md);
  background:var(--surface);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:border-color .3s var(--ease);
}
.timeline-card:hover{
  border-color:var(--cyan);
  box-shadow:
    0 0 0 1px var(--cyan-glow-edge),
    0 0 20px 2px color-mix(in srgb, var(--cyan) 28%, transparent),
    0 0 42px 4px color-mix(in srgb, var(--cyan) 11%, transparent);
}
.timeline-period{
  font-family:var(--font-mono);
  font-size:0.78rem;
  color:var(--cyan);
  margin-bottom:0.4rem;
}
.timeline-role{
  font-size:1.15rem;
  font-weight:600;
  color:var(--text);
}
.timeline-meta{
  margin-top:0.3rem;
  font-size:0.85rem;
  color:var(--text-dim);
}
.timeline-desc{
  margin-top:0.75rem;
  font-size:0.94rem;
  color:var(--text-muted);
}

/* =========================================================
   Education
========================================================= */
.education-grid{
  display:grid;
  grid-template-columns:repeat(2, 1fr);
  gap:1.25rem;
}
.education-card{
  padding:1.75rem 1.75rem;
  border:1px solid var(--border);
  border-left:2px solid var(--cyan);
  border-radius:var(--radius-md);
  background:var(--surface);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:border-color .3s var(--ease), box-shadow .3s var(--ease);
}
.education-grid .education-card:nth-child(2){ border-left-color:var(--violet); }
.education-card:hover{
  border-color:var(--cyan);
  box-shadow:
    0 0 0 1px var(--cyan-glow-edge),
    0 0 20px 2px color-mix(in srgb, var(--cyan) 28%, transparent),
    0 0 42px 4px color-mix(in srgb, var(--cyan) 11%, transparent);
}
.education-grid .education-card:nth-child(2):hover{
  border-color:var(--violet);
  box-shadow:
    0 0 0 1px color-mix(in srgb, var(--violet) 65%, transparent),
    0 0 20px 2px var(--violet-soft),
    0 0 42px 4px color-mix(in srgb, var(--violet) 12%, transparent);
}
.education-degree{
  font-size:1.05rem;
  font-weight:600;
  color:var(--text);
  line-height:1.35;
}
.education-school{
  margin-top:0.5rem;
  font-size:0.9rem;
  color:var(--text-muted);
}
.education-meta{
  margin-top:0.9rem;
  display:flex;
  flex-wrap:wrap;
  gap:0.75rem;
  align-items:center;
}
.education-period{
  font-family:var(--font-mono);
  font-size:0.78rem;
  color:var(--cyan);
}
.education-grid .education-card:nth-child(2) .education-period{ color:var(--violet); }
.education-grade{
  font-family:var(--font-mono);
  font-size:0.78rem;
  color:var(--text-dim);
  padding:2px 10px;
  border:1px solid var(--border-hi);
  border-radius:999px;
}

/* =========================================================
   Services
========================================================= */
.services-grid{
  display:grid;
  grid-template-columns:repeat(2, 1fr);
  align-items:stretch;
  gap:1.25rem;
}
.service-card{
  display:flex;
  flex-direction:column;
  height:100%;
  padding:2rem 1.6rem;
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  background:var(--surface);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:border-color .3s var(--ease), box-shadow .3s var(--ease), transform .3s var(--ease);
}
.service-card:hover,
.service-card:focus-visible{
  border-color:var(--cyan);
  transform:translateY(-4px);
  box-shadow:
    0 0 0 1px var(--cyan-glow-edge),
    0 0 20px 2px color-mix(in srgb, var(--cyan) 30%, transparent),
    0 0 46px 4px color-mix(in srgb, var(--cyan) 12%, transparent);
}
.service-card:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
}
.service-icon{
  display:inline-flex;
  width:44px; height:44px;
  align-items:center;
  justify-content:center;
  border-radius:var(--radius-sm);
  border:1px solid var(--border-hi);
  color:var(--cyan);
  margin-bottom:1.25rem;
}
.service-icon svg{ width:22px; height:22px; }
.service-card:nth-child(2n) .service-icon{ color:var(--violet); }
.service-title{
  font-size:1.08rem;
  font-weight:600;
  color:var(--text);
  margin-bottom:0.6rem;
}
.service-desc{
  font-size:0.92rem;
  color:var(--text-muted);
}

/* =========================================================
   Tech stack chips
========================================================= */
.chip-grid{
  display:grid;
  grid-template-columns:repeat(4, 1fr);
  gap:1rem;
}
.chip{
  display:flex;
  align-items:center;
  gap:0.85rem;
  padding:1rem 1.1rem;
  border:1px solid var(--border);
  border-radius:var(--radius-md);
  background:var(--surface);
  transition:border-color .3s var(--ease), transform .3s var(--ease);
}
.chip:hover{
  border-color:var(--cyan);
  transform:translateY(-2px);
  box-shadow:
    0 0 0 1px var(--cyan-glow-edge),
    0 0 18px 2px color-mix(in srgb, var(--cyan) 28%, transparent),
    0 0 36px 3px color-mix(in srgb, var(--cyan) 10%, transparent);
}
.chip-mono{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:38px; height:38px;
  flex-shrink:0;
  font-family:var(--font-mono);
  font-size:0.78rem;
  font-weight:500;
  border-radius:7px;
  color:var(--cyan);
  background:var(--cyan-soft);
  border:1px solid color-mix(in srgb, var(--cyan) 30%, transparent);
}
.chip:nth-child(even) .chip-mono{
  color:var(--violet);
  background:var(--violet-soft);
  border-color:color-mix(in srgb, var(--violet) 30%, transparent);
}
.chip-label{
  font-size:0.92rem;
  color:var(--text-muted);
}

/* =========================================================
   Testimonials
========================================================= */
.testimonials-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:1.25rem;
}
.testimonial-card{
  position:relative;
  padding:2rem 1.75rem;
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  background:var(--surface);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:border-color .3s var(--ease), box-shadow .3s var(--ease), transform .3s var(--ease);
}
.testimonial-card:hover{
  border-color:var(--cyan);
  transform:translateY(-4px);
  box-shadow:
    0 0 0 1px var(--cyan-glow-edge),
    0 0 20px 2px color-mix(in srgb, var(--cyan) 30%, transparent),
    0 0 46px 4px color-mix(in srgb, var(--cyan) 12%, transparent);
}
.testimonial-card--accent:hover{
  border-color:var(--violet);
  box-shadow:
    0 0 0 1px color-mix(in srgb, var(--violet) 65%, transparent),
    0 0 20px 2px var(--violet-soft),
    0 0 46px 4px color-mix(in srgb, var(--violet) 12%, transparent);
}
.testimonial-quote{
  display:inline-flex;
  color:var(--cyan);
  opacity:0.6;
  margin-bottom:1rem;
}
.testimonial-card--accent .testimonial-quote{ color:var(--violet); }
.testimonial-quote svg{ width:26px; height:26px; }
.testimonial-text{
  font-size:0.96rem;
  line-height:1.65;
  color:var(--text-muted);
}
.testimonial-author{
  display:flex;
  align-items:center;
  gap:0.85rem;
  margin-top:1.5rem;
}
.testimonial-avatar{
  display:flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
  width:42px; height:42px;
  border-radius:50%;
  font-family:var(--font-head);
  font-size:0.82rem;
  font-weight:700;
  color:var(--cyan);
  background:var(--cyan-soft);
  border:1px solid color-mix(in srgb, var(--cyan) 30%, transparent);
}
.testimonial-card--accent .testimonial-avatar{
  color:var(--violet);
  background:var(--violet-soft);
  border-color:color-mix(in srgb, var(--violet) 30%, transparent);
}
.testimonial-name{
  font-size:0.94rem;
  font-weight:600;
  color:var(--text);
}
.testimonial-role{
  margin-top:0.15rem;
  font-size:0.82rem;
  color:var(--text-dim);
}

/* =========================================================
   Contact
========================================================= */
.contact-head{
  max-width:100%;
  margin-left:auto;
  margin-right:auto;
  text-align:center;
}
.contact-sub{
  margin-top:1rem;
  color:var(--text-muted);
  font-size:1rem;
}

.contact-cards{
  margin-top:clamp(2.5rem, 5vw, 3.5rem);
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:1.25rem;
}
.contact-card{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:0.6rem;
  text-align:center;
  padding:2rem 1.5rem;
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  background:var(--surface);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:border-color .25s var(--ease), box-shadow .25s var(--ease), transform .25s var(--ease);
}
a.contact-card:hover{
  border-color:var(--cyan);
  transform:translateY(-4px);
  box-shadow:
    0 0 0 1px var(--cyan-glow-edge),
    0 0 20px 2px var(--cyan-glow-hi),
    0 0 42px 4px var(--cyan-glow-lo);
}
.contact-card-icon{
  display:flex;
  align-items:center;
  justify-content:center;
  width:46px; height:46px;
  border-radius:50%;
  border:1px solid var(--border-hi);
  color:var(--cyan);
  margin-bottom:0.4rem;
}
.contact-card-icon svg{ width:20px; height:20px; }
.contact-card-label{
  font-family:var(--font-mono);
  font-size:0.76rem;
  color:var(--text-dim);
}
.contact-card-value{
  font-size:1.02rem;
  font-weight:500;
  color:var(--text);
}

.contact-cta{
  display:flex;
  justify-content:center;
  flex-wrap:wrap;
  gap:1rem;
  margin-top:clamp(2rem, 4vw, 2.75rem);
}

.contact-socials{
  display:flex;
  gap:0.75rem;
}
.contact-socials--center{
  justify-content:center;
  margin-top:2rem;
}
.social-link{
  display:flex;
  align-items:center;
  justify-content:center;
  width:40px; height:40px;
  border-radius:50%;
  border:1px solid var(--border-hi);
  color:var(--text-muted);
  transition:color .25s var(--ease), border-color .25s var(--ease), box-shadow .25s var(--ease), transform .25s var(--ease);
}
.social-link svg{ width:18px; height:18px; }
.social-link--labeled{
  width:auto;
  gap:0.55rem;
  padding:0 1.1rem 0 0.95rem;
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:0.8rem;
}
.social-link:hover{
  color:var(--cyan);
  border-color:var(--cyan);
  transform:translateY(-2px);
  box-shadow:0 0 14px var(--cyan-soft);
}

/* =========================================================
   Footer
========================================================= */
.site-footer{
  position:relative;
  z-index:1;
  border-top:1px solid var(--border);
}
.footer-inner{
  max-width:var(--maxw);
  margin:0 auto;
  padding:2.5rem var(--gutter);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:1.25rem;
}
.footer-copy{
  margin:0;
  font-family:var(--font-mono);
  font-size:0.8rem;
  color:var(--text-muted);
}

/* =========================================================
   Scroll to top
   Hidden by default; script.js adds .is-visible once the page
   has been scrolled past a threshold (see initScrollTopButton).
========================================================= */
.scroll-top{
  position:fixed;
  right:clamp(16px, 4vw, 32px);
  bottom:clamp(16px, 4vw, 32px);
  z-index:50;
  width:46px; height:46px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  border:1px solid var(--border-hi);
  background:var(--header-bg);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  color:var(--cyan);
  cursor:pointer;
  opacity:0;
  transform:translateY(12px);
  pointer-events:none;
  transition:opacity .3s var(--ease), transform .3s var(--ease), border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.scroll-top svg{ width:20px; height:20px; }
.scroll-top.is-visible{
  opacity:1;
  transform:translateY(0);
  pointer-events:auto;
}
.scroll-top:hover{
  border-color:var(--cyan);
  box-shadow:
    0 0 0 1px var(--cyan-glow-edge),
    0 0 20px 2px var(--cyan-glow-hi),
    0 0 42px 4px var(--cyan-glow-lo);
}

/* =========================================================
   Content-section responsive
========================================================= */
@media (max-width: 900px){
  .about-grid{ grid-template-columns:1fr; }
  .services-grid{ grid-template-columns:repeat(2, 1fr); }
  .chip-grid{ grid-template-columns:repeat(3, 1fr); }
  .education-grid{ grid-template-columns:1fr; }
  .testimonials-grid{ grid-template-columns:1fr; }
  .contact-cards{ grid-template-columns:1fr; }
}

@media (max-width: 560px){
  .services-grid{ grid-template-columns:1fr; }
  .chip-grid{ grid-template-columns:repeat(2, 1fr); }
  .timeline{ padding-left:22px; }
  .timeline-node{ left:-22px; }
  .timeline-card{ padding:1.25rem; }
  .footer-inner{ flex-direction:column; text-align:center; }
}


/* =====================================================================
   SCROLL REVEAL
   script.js adds .reveal to the elements listed in REVEAL_SELECTORS,
   then .is-visible the first time each one scrolls into view. The
   script removes both classes again once the transition has finished,
   so each element's own hover/transition rules take back over.
   Uses the standalone `translate` property (not `transform`) so it
   never fights with the cards' own hover transforms, and it doesn't
   affect layout, so nothing shifts while elements animate in.
===================================================================== */
.reveal{
  opacity:0;
  translate:0 30px;
  transition:opacity 0.6s ease-out, translate 0.6s ease-out;
  transition-delay:var(--reveal-delay, 0s);
  will-change:opacity, translate;
}
.reveal.is-visible{
  opacity:1;
  translate:0 0;
}
@media (prefers-reduced-motion: reduce){
  .reveal{ opacity:1; translate:none; transition:none; will-change:auto; }
}
@media print{
  .reveal{ opacity:1; translate:none; transition:none; }
}