/* ════════════════════════════════════════════
   NITHISH BALAJI PORTFOLIO — style.css
   Theme: dark (default) | light (via [data-theme="light"])
   ════════════════════════════════════════════ */

/* ── DESIGN TOKENS ── */
:root {
  --serif: 'Cormorant Garamond', Georgia, serif;
  --sans:  'Syne', sans-serif;
  --mono:  'JetBrains Mono', monospace;
  --r-sm: .5rem; --r-md: .875rem; --r-lg: 1.25rem; --r-xl: 2rem;

  /* Accent ramp — sapphire → aurora (same in both themes) */
  --a1: #1e3a8a;
  --a2: #3b5bdb;
  --a3: #5c7cfa;
  --a4: #74c0fc;
  --a5: #00d2ff;
  --a6: #38d9a9;
  --ag: linear-gradient(135deg,#3b5bdb 0%,#5c7cfa 40%,#00d2ff 70%,#38d9a9 100%);

  /* Transition speed for theme switch */
  --theme-speed: .35s;
}

/* ── DARK THEME (default) ── */
[data-theme="dark"] {
  --bg:      #0a0a0f;
  --bg2:     #111118;
  --bg3:     #1a1a28;
  --fog:     #2a2a3a;
  --steel:   #4a4a6a;
  --ash:     #8a8aaa;
  --mist:    #c4c4d8;
  --snow:    #f0f0f8;
  --border:  rgba(92,124,250,.13);
  --border2: rgba(255,255,255,.07);
  --shadow:  rgba(0,0,0,.5);

  --nav-bg:        rgba(10,10,15,.72);
  --nav-bg-scroll: rgba(10,10,15,.92);
  --card-bg:       rgba(26,26,40,.85);
  --float-bg:      rgba(20,20,32,.92);

  --code-kw: #c792ea;
  --code-fn: #82aaff;
  --code-s:  #a3f7bf;
  --code-o:  #89ddff;
  --code-n:  #f78c6c;
  --code-k:  #ffcb6b;
  --code-cm: #546e7a;

  --toggle-bg:      rgba(26,26,40,.95);
  --toggle-border:  rgba(92,124,250,.35);
  --toggle-color:   var(--ash);
  --toggle-hover:   var(--a5);

  --exp-date-color: #a0c4ff;   /* ← bright in dark mode */
}

/* ── LIGHT THEME ── */
[data-theme="light"] {
  --bg:      #f5f6fa;
  --bg2:     #eceef5;
  --bg3:     #e0e3ef;
  --fog:     #c8cce0;
  --steel:   #8890b0;
  --ash:     #5a607a;
  --mist:    #2a2e45;
  --snow:    #12152a;
  --border:  rgba(59,91,219,.14);
  --border2: rgba(0,0,0,.08);
  --shadow:  rgba(59,91,219,.12);

  --nav-bg:        rgba(245,246,250,.8);
  --nav-bg-scroll: rgba(245,246,250,.97);
  --card-bg:       rgba(255,255,255,.9);
  --float-bg:      rgba(255,255,255,.95);

  --code-kw: #7c3aed;
  --code-fn: #1d4ed8;
  --code-s:  #059669;
  --code-o:  #0891b2;
  --code-n:  #dc2626;
  --code-k:  #b45309;
  --code-cm: #6b7280;

  --toggle-bg:      rgba(255,255,255,.95);
  --toggle-border:  rgba(59,91,219,.25);
  --toggle-color:   var(--ash);
  --toggle-hover:   var(--a2);

  --exp-date-color: #1d4ed8;   /* ← rich blue in light mode */
}

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  background: var(--bg);
  color: var(--snow);
  font-family: var(--sans);
  font-weight: 400;
  overflow-x: hidden;
  cursor: none;
  -webkit-font-smoothing: antialiased;
  transition: background var(--theme-speed), color var(--theme-speed);
}
a { color: inherit; text-decoration: none; }
img, svg { display: block; }
ul { list-style: none; }

/* ── CURSOR ── */
#C, #CR {
  position: fixed; top: 0; left: 0;
  pointer-events: none; z-index: 9999;
  border-radius: 50%;
  transform: translate(-50%,-50%);
  will-change: transform;
}
#C {
  width: 8px; height: 8px;
  background: var(--a5);
  transition: width .2s, height .2s, background .2s;
}
#CR {
  width: 40px; height: 40px;
  border: 1px solid rgba(92,124,250,.45);
  transition: width .4s ease, height .4s ease, border-color .4s;
}
body.hovering #C  { width: 14px; height: 14px; background: var(--a6); }
body.hovering #CR { width: 60px; height: 60px; border-color: rgba(0,210,255,.5); }

/* ── THEME TOGGLE BUTTON ── */
#theme-toggle {
  position: fixed; top: 14px; right: 180px;
  z-index: 900;
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 1px solid var(--toggle-border);
  background: var(--toggle-bg);
  backdrop-filter: blur(20px);
  color: var(--toggle-color);
  cursor: none;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--theme-speed), border-color var(--theme-speed),
              color .2s, transform .2s, box-shadow .2s;
  box-shadow: 0 4px 20px var(--shadow);
}
#theme-toggle:hover {
  color: var(--toggle-hover);
  border-color: var(--a5);
  transform: translateY(-1px) rotate(15deg);
  box-shadow: 0 8px 28px var(--shadow), 0 0 16px rgba(0,210,255,.15);
}
.t-icon { width: 18px; height: 18px; display: flex; align-items: center; justify-content: center; }
.t-icon svg { width: 18px; height: 18px; }

/* Show/hide sun vs moon */
[data-theme="dark"]  .t-sun  { display: flex; }
[data-theme="dark"]  .t-moon { display: none; }
[data-theme="light"] .t-sun  { display: none; }
[data-theme="light"] .t-moon { display: flex; }

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 3px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--a3); border-radius: 2px; }

/* ── NAV ── */
nav {
  position: fixed; inset: 0 0 auto 0;
  z-index: 800;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 3.5rem;
  height: 64px;
  background: var(--nav-bg);
  backdrop-filter: blur(28px) saturate(1.6);
  border-bottom: 1px solid var(--border);
  transition: background var(--theme-speed), border-color var(--theme-speed);
}
.nav-logo {
  font-family: var(--mono); font-size: .78rem; letter-spacing: .18em;
  color: var(--a5); display: flex; align-items: center; gap: .5rem;
}
.nav-logo-mark {
  width: 28px; height: 28px;
  border: 1.5px solid var(--a3); border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  font-size: .65rem; font-weight: 700; color: var(--a3);
}
nav ul { display: flex; gap: 2.5rem; }
nav ul a {
  font-size: .72rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ash); font-weight: 500;
  transition: color .2s; position: relative;
}
nav ul a::after {
  content: ''; position: absolute; bottom: -4px; left: 0; right: 0;
  height: 1px; background: var(--a5);
  transform: scaleX(0); transform-origin: left; transition: transform .25s;
}
nav ul a:hover { color: var(--snow); }
nav ul a:hover::after { transform: scaleX(1); }
.nav-hire {
  font-size: .72rem; letter-spacing: .1em; text-transform: uppercase;
  font-weight: 600; padding: .5rem 1.4rem; border-radius: var(--r-xl);
  background: var(--ag); color: #fff;
  transition: opacity .2s, transform .2s;
  box-shadow: 0 0 24px rgba(92,124,250,.3);
}
.nav-hire:hover { opacity: .88; transform: translateY(-1px); }

/* ── HERO ── */
#hero {
  position: relative; min-height: 100svh;
  display: flex; align-items: center; overflow: hidden;
}
#hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.mesh {
  position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(ellipse 70% 60% at 80% 20%, rgba(59,91,219,.22) 0%, transparent 60%),
    radial-gradient(ellipse 50% 50% at 20% 80%, rgba(0,210,255,.10) 0%, transparent 55%),
    radial-gradient(ellipse 40% 40% at 55% 50%, rgba(56,217,169,.07) 0%, transparent 50%);
  transition: opacity var(--theme-speed);
}
[data-theme="light"] .mesh { opacity: .5; }
.grid-bg {
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(92,124,250,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(92,124,250,.055) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 20%, transparent 80%);
}
.vignette {
  position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(ellipse 100% 100% at 50% 50%, transparent 40%, var(--bg) 100%);
  transition: background var(--theme-speed);
}
.hero-inner {
  position: relative; z-index: 2; width: 100%;
  max-width: 1160px; margin: 0 auto;
  padding: 80px 4rem 0;
  display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center;
}
.h-eyebrow {
  display: inline-flex; align-items: center; gap: .6rem;
  font-family: var(--mono); font-size: .68rem; letter-spacing: .18em;
  color: var(--a5); text-transform: uppercase; margin-bottom: 1.6rem;
  opacity: 0; transform: translateY(16px);
  animation: up .7s ease .2s forwards;
}
.h-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--a5); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100%{opacity:1;} 50%{opacity:.25;} }

.h-name {
  font-family: var(--serif);
  font-size: clamp(3.6rem,6.5vw,7rem);
  font-weight: 300; line-height: 1.0; letter-spacing: -.01em;
  margin-bottom: .6rem;
  opacity: 0; transform: translateY(24px);
  animation: up .85s ease .35s forwards;
}
.h-name em {
  font-style: italic;
  background: var(--ag);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.h-role {
  font-family: var(--mono); font-size: .85rem; letter-spacing: .08em;
  color: var(--mist); margin-bottom: 2rem;
  opacity: 0; transform: translateY(16px);
  animation: up .7s ease .55s forwards;
}
.h-desc {
  font-size: .95rem; line-height: 1.85; color: var(--ash);
  max-width: 420px; margin-bottom: 2.5rem;
  opacity: 0; transform: translateY(16px);
  animation: up .7s ease .7s forwards;
}
.h-desc strong { color: var(--snow); font-weight: 500; }
.h-cta {
  display: flex; gap: 1rem; align-items: center;
  opacity: 0; transform: translateY(16px);
  animation: up .7s ease .85s forwards;
}
.btn-a {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .82rem 2rem; border-radius: var(--r-xl);
  background: var(--ag); color: #fff;
  font-family: var(--sans); font-size: .8rem; font-weight: 600; letter-spacing: .06em;
  box-shadow: 0 0 40px rgba(92,124,250,.35);
  transition: opacity .2s, transform .2s, box-shadow .2s;
}
.btn-a:hover { opacity: .9; transform: translateY(-2px); box-shadow: 0 12px 50px rgba(92,124,250,.45); }
.btn-b {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .82rem 2rem; border-radius: var(--r-xl);
  border: 1px solid var(--border2); color: var(--snow);
  font-size: .8rem; font-weight: 500; letter-spacing: .06em;
  transition: border-color .2s, background .2s;
}
.btn-b:hover { border-color: var(--a3); background: rgba(92,124,250,.08); }
.h-stats {
  display: flex; gap: 2.5rem;
  margin-top: 3.5rem; padding-top: 2.5rem;
  border-top: 1px solid var(--border2);
  opacity: 0; animation: up .7s ease 1.05s forwards;
}
.stat-n {
  font-family: var(--serif); font-size: 2.8rem; font-weight: 300; letter-spacing: -.02em;
  background: var(--ag);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  display: block;
}
.stat-l { font-size: .68rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ash); }

/* Hero right */
.hero-r {
  position: relative; display: flex; align-items: center; justify-content: center;
  opacity: 0; transform: translateX(30px);
  animation: faderight .9s ease .5s forwards;
}
@keyframes faderight { to { opacity:1; transform:translateX(0); } }
.card-stack { position: relative; width: 100%; max-width: 400px; }
.hcard {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--r-lg); overflow: hidden;
  backdrop-filter: blur(20px);
  box-shadow: 0 30px 80px var(--shadow), 0 0 80px rgba(59,91,219,.12);
  transition: background var(--theme-speed), border-color var(--theme-speed);
}
.hcard-bar {
  display: flex; align-items: center; gap: .45rem;
  padding: .8rem 1.1rem;
  background: rgba(10,10,15,.25);
  border-bottom: 1px solid var(--border);
}
[data-theme="light"] .hcard-bar { background: rgba(0,0,0,.04); }
.hd { width: 10px; height: 10px; border-radius: 50%; }
.hd1{background:#ff5f57;} .hd2{background:#febc2e;} .hd3{background:#28c840;}
.hcard-file { font-family: var(--mono); font-size: .65rem; color: var(--steel); margin-left: auto; }
.hcard-body { padding: 1.4rem 1.5rem 1.8rem; font-family: var(--mono); font-size: .72rem; line-height: 1.95; color: var(--mist); }
.kw{color:var(--code-kw);} .fn{color:var(--code-fn);} .s{color:var(--code-s);}
.o{color:var(--code-o);}   .n{color:var(--code-n);}  .k{color:var(--code-k);}
.cm{color:var(--code-cm);}

/* Floating mini-cards */
.float-card {
  position: absolute;
  background: var(--float-bg);
  border: 1px solid var(--border);
  border-radius: var(--r-md); padding: .9rem 1.1rem;
  backdrop-filter: blur(16px); font-size: .72rem;
  box-shadow: 0 16px 48px var(--shadow);
  color: var(--snow);
  transition: background var(--theme-speed), border-color var(--theme-speed);
}
.fc1 { right: -60px; top: 30px; animation: float1 6s ease-in-out infinite; }
.fc2 { left: -50px; bottom: 60px; animation: float2 7s ease-in-out infinite; }
@keyframes float1 { 0%,100%{transform:translateY(0) rotate(2deg);}  50%{transform:translateY(-12px) rotate(-1deg);} }
@keyframes float2 { 0%,100%{transform:translateY(0) rotate(-2deg);} 50%{transform:translateY(10px) rotate(1deg);} }
.fc-label { font-family: var(--mono); font-size: .58rem; letter-spacing: .12em; color: var(--ash); margin-bottom: .35rem; text-transform: uppercase; }
.fc-val { font-weight: 600; color: var(--snow); font-size: .78rem; }
.fc-sub { font-size: .6rem; color: var(--ash); margin-top: .1rem; }
.fc-dot-g { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: #38d9a9; margin-right: .4rem; animation: pulse 2s infinite; }
.fc-bar { height: 3px; background: rgba(92,124,250,.2); border-radius: 2px; margin-top: .5rem; overflow: hidden; }
.fc-fill { height: 100%; border-radius: 2px; background: var(--ag); }
#tcursor { display:inline-block; width:2px; height:.9em; background:var(--a5); vertical-align:text-bottom; animation:blink 1s step-end infinite; }
@keyframes blink { 0%,100%{opacity:1;} 50%{opacity:0;} }

/* ── SECTIONS ── */
.sec { position: relative; padding: 8rem 4rem; overflow: hidden; }
.sec-inner { max-width: 1100px; margin: 0 auto; }
.sec-center { text-align: center; }
.sec-center .sec-inner { max-width: 640px; }
.eyebrow {
  font-family: var(--mono); font-size: .65rem; letter-spacing: .2em; text-transform: uppercase;
  color: var(--a5); display: flex; align-items: center; gap: .75rem; margin-bottom: 1rem;
}
.eyebrow::before { content: ''; width: 24px; height: 1px; background: var(--a5); }
.sec-center .eyebrow { justify-content: center; }
.sec-center .eyebrow::before { display: none; }
.sec-h {
  font-family: var(--serif);
  font-size: clamp(2.2rem,4vw,3.5rem);
  font-weight: 300; line-height: 1.15; margin-bottom: 1rem;
}
.sec-h em { font-style: italic; color: var(--a4); }
.sec-sub { color: var(--ash); font-size: .9rem; line-height: 1.8; max-width: 480px; }

/* Reveal */
.rv { opacity: 0; transform: translateY(32px); transition: opacity .8s ease, transform .8s ease; }
.rv.show { opacity: 1; transform: translateY(0); }

/* ── ABOUT ── */
#about { background: var(--bg2); transition: background var(--theme-speed); }
#about .sec-bg {
  position: absolute; right: -200px; top: -200px; width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(59,91,219,.07) 0%, transparent 65%);
  border-radius: 50%; pointer-events: none;
}
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6rem; align-items: center; margin-top: 4rem; }
.about-p { color: var(--ash); line-height: 1.85; margin-bottom: 1rem; font-size: .92rem; }
.about-p strong { color: var(--snow); font-weight: 500; }
.about-links { display: flex; gap: .75rem; flex-wrap: wrap; margin-top: 2rem; }
.pill-link {
  display: inline-flex; align-items: center; gap: .4rem;
  font-size: .7rem; letter-spacing: .08em; color: var(--mist);
  border: 1px solid var(--border2); padding: .4rem 1rem; border-radius: var(--r-xl);
  transition: color .2s, border-color .2s, background .2s;
}
.pill-link svg { width: 12px; height: 12px; }
.pill-link:hover { color: var(--a5); border-color: rgba(0,210,255,.4); background: rgba(0,210,255,.05); }

/* Monogram */
.mono-card { display: flex; align-items: center; justify-content: center; position: relative; }
.mono-ring-outer {
  width: 280px; height: 280px; border-radius: 50%;
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center; position: relative;
  animation: spin-slow 40s linear infinite;
}
@keyframes spin-slow { to { transform:rotate(360deg); } }
.mono-ring-inner {
  width: 220px; height: 220px; border-radius: 50%;
  border: 1px solid rgba(0,210,255,.12);
  display: flex; align-items: center; justify-content: center;
  animation: spin-slow 28s linear infinite reverse;
}
.mono-core {
  width: 150px; height: 150px; border-radius: var(--r-lg);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--serif); font-size: 3.5rem; font-weight: 300;
  background: var(--ag); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  animation: spin-slow 40s linear infinite reverse;
  box-shadow: 0 0 60px rgba(92,124,250,.2); position: relative;
}
.mono-core::after { content: ''; position: absolute; inset: 0; border-radius: var(--r-lg); background: var(--bg3); z-index: -1; transition: background var(--theme-speed); }
.orbit-dot {
  position: absolute; width: 8px; height: 8px; border-radius: 50%;
  background: var(--a5); top: -4px; left: 50%; transform: translateX(-50%);
  box-shadow: 0 0 12px var(--a5);
}
.orbit-dot2 { background: var(--a6); top: auto; bottom: -4px; box-shadow: 0 0 12px var(--a6); }
.status-badge {
  position: absolute; bottom: 10px; right: 10px;
  background: var(--bg3); border: 1px solid rgba(56,217,169,.3);
  border-radius: var(--r-md); padding: .6rem .9rem;
  display: flex; align-items: center; gap: .5rem; font-size: .7rem;
  transition: background var(--theme-speed);
}
.s-dot { width: 7px; height: 7px; background: #38d9a9; border-radius: 50%; animation: pulse 2s infinite; }
.s-txt { color: var(--mist); }

/* ── SKILLS ── */
#skills { background: var(--bg); transition: background var(--theme-speed); }
#skills::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 50% at 50% 50%, rgba(59,91,219,.06) 0%, transparent 65%);
  pointer-events: none;
}
.skills-top { margin-bottom: 4rem; }
.skills-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.25rem; }
.sk-card {
  position: relative; background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 2rem 1.75rem; overflow: hidden;
  transition: border-color .35s, transform .35s, box-shadow .35s, background var(--theme-speed);
  cursor: default;
}
.sk-card::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(92,124,250,.06) 0%, transparent 60%);
  opacity: 0; transition: opacity .35s;
}
.sk-card:hover { border-color: rgba(92,124,250,.45); transform: translateY(-5px); box-shadow: 0 20px 60px rgba(59,91,219,.15); }
.sk-card:hover::before { opacity: 1; }
.sk-icon {
  width: 44px; height: 44px; border-radius: var(--r-md);
  margin-bottom: 1.2rem; display: flex; align-items: center; justify-content: center; position: relative;
}
.sk-icon svg { width: 22px; height: 22px; position: relative; z-index: 1; }
.sk-icon-fg { background: rgba(92,124,250,.12); color: var(--a3); border: 1px solid rgba(92,124,250,.2); }
.sk-icon-cy { background: rgba(0,210,255,.1); color: var(--a5); border: 1px solid rgba(0,210,255,.2); }
.sk-icon-gr { background: rgba(56,217,169,.1); color: #38d9a9; border: 1px solid rgba(56,217,169,.2); }
.sk-cat { font-family: var(--mono); font-size: .6rem; letter-spacing: .18em; text-transform: uppercase; color: var(--a5); margin-bottom: .4rem; }
.sk-name { font-size: 1rem; font-weight: 600; margin-bottom: .9rem; color: var(--snow); }
.sk-tags { display: flex; flex-wrap: wrap; gap: .35rem; }
.sk-tag {
  font-family: var(--mono); font-size: .6rem;
  background: var(--bg3); color: var(--ash);
  padding: .22rem .6rem; border-radius: .25rem;
  border: 1px solid var(--border2);
  transition: color .2s, border-color .2s, background .2s, background var(--theme-speed);
}
.sk-card:hover .sk-tag { color: var(--mist); border-color: rgba(92,124,250,.25); background: rgba(92,124,250,.07); }
.sk-line {
  position: absolute; bottom: 0; left: 0; right: 0; height: 2px;
  background: var(--ag);
  transform: scaleX(0); transform-origin: left; transition: transform .4s ease;
  border-radius: 0 0 var(--r-lg) var(--r-lg);
}
.sk-card:hover .sk-line { transform: scaleX(1); }

/* ── EXPERIENCE ── */
#experience { background: var(--bg2); transition: background var(--theme-speed); }
.exp-bg {
  position: absolute; left: -300px; bottom: -300px; width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(0,210,255,.05) 0%, transparent 65%);
  border-radius: 50%; pointer-events: none;
}
.exp-top { margin-bottom: 4rem; }
.exp-layout { display: grid; grid-template-columns: 200px 1fr; }
.exp-tabs { border-right: 1px solid var(--border2); display: flex; flex-direction: column; }
.exp-tab {
  padding: 1.4rem 1.8rem 1.4rem 0;
  cursor: pointer;
  border-right: 2px solid transparent; margin-right: -1px;
  transition: border-color .2s;
}
.exp-tab.active { border-right-color: var(--a5); }
.exp-tab-co { font-size: .82rem; font-weight: 600; color: var(--steel); margin-bottom: .2rem; transition: color .2s; }
.exp-tab.active .exp-tab-co { color: var(--a5); }
.exp-tab:not(.active):hover .exp-tab-co { color: var(--ash); }

/* ★ EXPERIENCE DATE — bright and readable ★ */
.exp-tab-date {
  font-family: var(--mono); font-size: .65rem; letter-spacing: .08em;
  color: var(--exp-date-color);
  font-weight: 500;
}

.exp-panels { padding-left: 3rem; }
.exp-panel { display: none; }
.exp-panel.active { display: block; animation: fadePanel .4s ease; }
@keyframes fadePanel { from{opacity:0;transform:translateX(12px);} to{opacity:1;transform:translateX(0);} }
.ep-role { font-size: 1.2rem; font-weight: 600; color: var(--snow); margin-bottom: .2rem; }
.ep-at { font-family: var(--mono); font-size: .75rem; color: var(--a5); margin-bottom: .35rem; }
.ep-period { font-size: .72rem; color: var(--mist); margin-bottom: 1.6rem; font-weight: 500; }
.ep-bullets { display: flex; flex-direction: column; gap: .75rem; }
.ep-li { display: flex; gap: .9rem; align-items: flex-start; color: var(--ash); font-size: .88rem; line-height: 1.75; }
.ep-arrow {
  flex-shrink: 0; width: 18px; height: 18px; border-radius: 50%;
  background: rgba(92,124,250,.12); border: 1px solid rgba(92,124,250,.25);
  display: flex; align-items: center; justify-content: center; margin-top: 3px;
}
.ep-arrow svg { width: 8px; height: 8px; stroke: var(--a3); fill: none; stroke-width: 2.5; }
.ep-li strong { color: var(--snow); font-weight: 500; }

/* ── PROJECTS ── */
#projects { background: var(--bg); transition: background var(--theme-speed); }
.proj-top { margin-bottom: 4rem; }
.proj-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.25rem; }
.pj-card {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--r-lg); overflow: hidden;
  display: flex; flex-direction: column;
  transition: border-color .35s, transform .35s, box-shadow .35s, background var(--theme-speed);
}
.pj-card:hover { border-color: rgba(92,124,250,.38); transform: translateY(-6px); box-shadow: 0 24px 72px var(--shadow); }
.pj-banner { height: 160px; position: relative; overflow: hidden; display: flex; align-items: center; justify-content: center; }
.pj-banner-label {
  position: relative; z-index: 2;
  font-family: var(--mono); font-size: .6rem; letter-spacing: .18em; text-transform: uppercase;
  color: rgba(255,255,255,.55);
  background: rgba(10,10,15,.5); padding: .3rem .75rem;
  border-radius: var(--r-xl); border: 1px solid rgba(255,255,255,.1);
}
.pj-body { padding: 1.5rem; flex: 1; display: flex; flex-direction: column; }
.pj-name { font-size: 1rem; font-weight: 600; color: var(--snow); margin-bottom: .5rem; }
.pj-desc { color: var(--ash); font-size: .83rem; line-height: 1.75; flex: 1; margin-bottom: 1.2rem; }
.pj-stack { display: flex; flex-wrap: wrap; gap: .35rem; margin-bottom: 1.2rem; }
.pj-tag {
  font-family: var(--mono); font-size: .58rem;
  background: rgba(92,124,250,.08); color: #a8b4ff;
  padding: .2rem .55rem; border-radius: .25rem;
  border: 1px solid rgba(92,124,250,.18);
}
[data-theme="light"] .pj-tag { background: rgba(59,91,219,.08); color: #2563eb; border-color: rgba(59,91,219,.2); }
.pj-link {
  display: inline-flex; align-items: center; gap: .4rem;
  font-size: .72rem; color: var(--a5); letter-spacing: .05em; font-weight: 500;
  transition: gap .2s, color .2s;
}
.pj-link svg { width: 10px; height: 10px; }
.pj-link:hover { gap: .7rem; color: var(--a6); }

/* ── CERTS ── */
#certs { background: var(--bg2); transition: background var(--theme-speed); }
.certs-top { margin-bottom: 4rem; }
.certs-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 1rem; }
.cert {
  background: var(--bg); border: 1px solid var(--border2);
  border-radius: var(--r-lg); padding: 1.6rem;
  display: grid; grid-template-columns: 56px 1fr; gap: 1.2rem; align-items: center;
  text-decoration: none;
  transition: border-color .25s, transform .25s, box-shadow .25s, background var(--theme-speed);
}
.cert:hover { border-color: rgba(232,201,122,.35); transform: translateY(-3px); box-shadow: 0 12px 40px var(--shadow); }
.cert-dim { opacity: .6; pointer-events: none; }
.cert-icon-wrap {
  width: 52px; height: 52px; border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.cert-icon-wrap svg { width: 26px; height: 26px; }
.ci-blue { background: rgba(92,124,250,.1); border: 1px solid rgba(92,124,250,.2); color: var(--a3); }
.ci-gold { background: rgba(232,201,122,.08); border: 1px solid rgba(232,201,122,.2); color: #e8c97a; }
.ci-teal { background: rgba(56,217,169,.08); border: 1px solid rgba(56,217,169,.2); color: #38d9a9; }
.ci-red  { background: rgba(255,107,107,.08); border: 1px solid rgba(255,107,107,.2); color: #ff8a8a; }
.cert-name { font-size: .88rem; font-weight: 600; color: var(--snow); margin-bottom: .2rem; }
.cert-issuer { font-family: var(--mono); font-size: .62rem; color: var(--a5); letter-spacing: .08em; }
.cert-issuer-muted { color: var(--ash); }

/* ── CONTACT ── */
#contact { background: var(--bg); transition: background var(--theme-speed); }
.contact-desc { color: var(--ash); font-size: .9rem; line-height: 1.85; margin: 1.5rem 0 3rem; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: .9rem; text-align: left; margin-bottom: 2.5rem; }
.ci {
  background: var(--bg2); border: 1px solid var(--border2);
  border-radius: var(--r-lg); padding: 1.2rem;
  display: flex; align-items: center; gap: .9rem; text-decoration: none;
  transition: border-color .2s, transform .2s, background var(--theme-speed);
}
.ci:hover { border-color: rgba(92,124,250,.4); transform: translateY(-2px); }
.ci-ico {
  width: 40px; height: 40px; border-radius: var(--r-md);
  background: rgba(92,124,250,.08); border: 1px solid rgba(92,124,250,.15);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.ci-ico svg { width: 18px; height: 18px; stroke: var(--a3); fill: none; stroke-width: 1.5; }
.ci-lbl { font-size: .62rem; color: var(--ash); letter-spacing: .1em; text-transform: uppercase; margin-bottom: .2rem; font-family: var(--mono); }
.ci-val { font-size: .82rem; color: var(--snow); font-weight: 500; }
.contact-btns { display: flex; gap: 1rem; justify-content: center; }

/* ── FOOTER ── */
footer {
  background: var(--bg2); border-top: 1px solid var(--border2);
  padding: 2rem 3.5rem;
  display: flex; align-items: center; justify-content: space-between;
  transition: background var(--theme-speed), border-color var(--theme-speed);
}
.ft-l { font-size: .72rem; color: var(--steel); }
.ft-name { background: var(--ag); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.ft-r { font-family: var(--mono); font-size: .62rem; color: var(--fog); }

/* ── ANIMATION KEYFRAMES ── */
@keyframes up { to { opacity:1; transform:translateY(0); } }

/* ── RESPONSIVE ── */
@media (max-width: 960px) {
  nav { padding: 0 1.5rem; }
  nav ul, .nav-hire { display: none; }
  #theme-toggle { right: 70px; }
  .hero-inner { grid-template-columns: 1fr; padding: 0 1.5rem; padding-top: 80px; }
  .hero-r { display: none; }
  .sec { padding: 5rem 1.5rem; }
  .about-grid, .exp-layout { grid-template-columns: 1fr; }
  .exp-tabs { flex-direction: row; border-right: none; border-bottom: 1px solid var(--border2); overflow-x: auto; margin-bottom: 2rem; }
  .exp-tab { border-right: none; border-bottom: 2px solid transparent; margin-right: 0; margin-bottom: -1px; padding: 1rem 1.5rem; }
  .exp-tab.active { border-right-color: transparent; border-bottom-color: var(--a5); }
  .exp-panels { padding-left: 0; }
  .skills-grid, .proj-grid, .certs-grid, .contact-grid { grid-template-columns: 1fr; }
  footer { flex-direction: column; gap: .75rem; padding: 1.5rem; text-align: center; }
}