/* ============================================================
   Akhil CH portfolio
   Terminal-dark theme. IBM Plex Mono. Phosphor green, used with restraint.
   ============================================================ */

:root {
  --bg:        #080b10;
  --bg-elev:   #0c1119;
  --panel:     #0f1620;
  --panel-2:   #121b27;
  --border:    #1d2a3a;
  --border-lit:#2a3f57;

  --text:      #c7d3e0;
  --text-dim:  #8a9bad;
  --muted:     #5f7184;

  --green:     #3ff495;   /* primary accent (phosphor) */
  --green-dim: #2bbf74;
  --cyan:      #5ec8e0;   /* secondary accent */
  --amber:     #e6c07b;   /* highlight / warning */
  --red:       #e06c75;

  --glow: 0 0 0.6em rgba(63, 244, 149, 0.35);
  --maxw: 1080px;
  --radius: 10px;

  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--mono);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  /* faint terminal grid + radial glow */
  background-image:
    radial-gradient(900px 500px at 75% -10%, rgba(63,244,149,0.06), transparent 60%),
    radial-gradient(700px 500px at 0% 10%, rgba(94,200,224,0.05), transparent 55%),
    linear-gradient(rgba(255,255,255,0.012) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.012) 1px, transparent 1px);
  background-size: auto, auto, 100% 32px, 32px 100%;
}

::selection { background: rgba(63,244,149,0.25); color: #fff; }

a { color: var(--green); text-decoration: none; transition: color .15s ease; }
a:hover { color: var(--cyan); }

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

.prompt { color: var(--green); font-weight: 600; margin-right: .5ch; }

/* ---------- CRT overlays ---------- */
.scanlines {
  position: fixed; inset: 0; z-index: 9999; pointer-events: none;
  background: repeating-linear-gradient(
    to bottom, rgba(0,0,0,0) 0, rgba(0,0,0,0) 2px, rgba(0,0,0,0.10) 3px, rgba(0,0,0,0) 4px);
  mix-blend-mode: multiply; opacity: .5;
}
.vignette {
  position: fixed; inset: 0; z-index: 9998; pointer-events: none;
  box-shadow: inset 0 0 220px rgba(0,0,0,0.8);
}

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; gap: 1.5rem;
  padding: 0.9rem clamp(1rem, 5vw, 3rem);
  background: rgba(8,11,16,0.78);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 600; font-size: 0.95rem; letter-spacing: .3px; }
.brand-prompt { color: var(--green); }
.brand-sep, .brand-path { color: var(--text-dim); }
.brand-caret { color: var(--cyan); margin-left: .2ch; }
.brand:hover { color: inherit; }

.nav-links { display: flex; gap: 1.4rem; margin-left: auto; }
.nav-links a { color: var(--text-dim); font-size: 0.9rem; position: relative; }
.nav-links a::before { content: "/"; color: var(--muted); margin-right: .35ch; opacity: 0; transition: opacity .15s; }
.nav-links a:hover { color: var(--green); }
.nav-links a:hover::before { opacity: 1; }

.resume-btn {
  border: 1px solid var(--green-dim); color: var(--green);
  padding: .4rem .9rem; border-radius: 6px; font-size: .85rem;
  transition: all .18s ease;
}
.resume-btn:hover { background: rgba(63,244,149,0.1); box-shadow: var(--glow); color: var(--green); }

.nav-toggle { display: none; flex-direction: column; gap: 4px; background: none; border: 0; cursor: pointer; padding: 6px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--green); transition: .25s; }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  max-width: var(--maxw); margin: 0 auto;
  padding: clamp(2.5rem, 7vw, 5rem) clamp(1rem, 5vw, 3rem) 1.5rem;
}
.term {
  border: 1px solid var(--border-lit); border-radius: var(--radius);
  background: linear-gradient(180deg, var(--panel), var(--bg-elev));
  box-shadow: 0 24px 60px -30px rgba(0,0,0,0.9), 0 0 0 1px rgba(63,244,149,0.04);
  overflow: hidden;
}
.term-bar {
  display: flex; align-items: center; gap: .5rem;
  padding: .65rem .9rem; background: #0a0e15; border-bottom: 1px solid var(--border);
}
.dot { width: 11px; height: 11px; border-radius: 50%; display: inline-block; }
.dot-r { background: #ec5f5f; } .dot-y { background: #e6c07b; } .dot-g { background: #44d07a; }
.term-title { margin-left: .6rem; color: var(--muted); font-size: .8rem; }

.term-body { padding: clamp(1.2rem, 4vw, 2.4rem); }
.term-line { color: var(--text-dim); font-size: .92rem; margin-top: 1rem; }
.term-line:first-child { margin-top: 0; }

.hero-name {
  font-size: clamp(2.2rem, 7vw, 3.6rem); font-weight: 700; line-height: 1.1;
  color: #eef4fb; margin: .25rem 0 .2rem; letter-spacing: -.5px;
  text-shadow: 0 0 26px rgba(63,244,149,0.18);
}
.hero-role { font-size: clamp(1.1rem, 3vw, 1.5rem); color: var(--green); font-weight: 600; }
.hero-tagline { font-size: clamp(1rem, 2.4vw, 1.15rem); color: var(--text); margin-top: .2rem; min-height: 1.8em; }
.cursor { color: var(--green); animation: blink 1.05s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

.hero-meta { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1.6rem; }
.chip {
  font-size: .78rem; color: var(--cyan);
  border: 1px solid var(--border-lit); border-radius: 999px;
  padding: .25rem .75rem; background: rgba(94,200,224,0.05);
}

.hero-cta { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.8rem; }
.btn {
  font-family: var(--mono); font-size: .9rem; cursor: pointer;
  border: 1px solid var(--border-lit); color: var(--text);
  padding: .6rem 1.15rem; border-radius: 7px; background: var(--panel-2);
  transition: all .18s ease;
}
.btn:hover { border-color: var(--cyan); color: var(--cyan); transform: translateY(-1px); }
.btn-primary { border-color: var(--green-dim); color: var(--green); background: rgba(63,244,149,0.08); }
.btn-primary:hover { background: rgba(63,244,149,0.16); color: var(--green); box-shadow: var(--glow); }

.hero-loc { color: var(--muted); font-size: .85rem; margin-top: 1.4rem; padding-left: .25rem; }
.hero-loc .prompt { color: var(--cyan); }

/* ============================================================
   SECTIONS
   ============================================================ */
.section {
  max-width: var(--maxw); margin: 0 auto;
  padding: clamp(2.5rem, 6vw, 4.5rem) clamp(1rem, 5vw, 3rem);
  border-top: 1px solid var(--border);
}
.section-head {
  font-size: 1.05rem; font-weight: 600; color: var(--text-dim);
  margin-bottom: 1.8rem; letter-spacing: .3px;
}
.section-head .prompt { font-size: 1.1rem; }

/* reveal-on-scroll */
.section, .project, .skill-card, .tl-item { --rev: 1; }
[data-reveal] { opacity: 0; transform: translateY(14px); }
[data-reveal].in { opacity: 1; transform: none; transition: opacity .5s ease, transform .5s ease; }

/* ---------- About ---------- */
.prose { max-width: 70ch; }
.prose p { color: var(--text-dim); margin-bottom: 1rem; }
.prose p:first-child { color: var(--text); }
.certs { list-style: none; display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 1.8rem; }
.certs li {
  font-size: .8rem; color: var(--amber);
  border: 1px solid var(--border-lit); border-left: 2px solid var(--amber);
  padding: .35rem .8rem; border-radius: 4px; background: rgba(230,192,123,0.05);
}

/* ---------- Skills ---------- */
.skills-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 1rem; }
.skill-card {
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--panel); padding: 1.2rem 1.3rem; transition: border-color .2s, transform .2s;
}
.skill-card:hover { border-color: var(--border-lit); transform: translateY(-2px); }
.skill-card h3 { font-size: .95rem; margin-bottom: .9rem; }
.dir { color: var(--cyan); }
.dir::before { content: "\1F4C1"; filter: grayscale(1) opacity(.6); margin-right: .5ch; font-size: .9em; }
.tags { display: flex; flex-wrap: wrap; gap: .4rem; }
.tags span {
  font-size: .76rem; color: var(--text-dim);
  background: var(--panel-2); border: 1px solid var(--border);
  padding: .2rem .6rem; border-radius: 4px;
}

/* ---------- Projects ---------- */
.projects { display: grid; grid-template-columns: repeat(auto-fit, minmax(330px, 1fr)); gap: 1rem; }
.project {
  border: 1px solid var(--border); border-radius: var(--radius);
  background: linear-gradient(180deg, var(--panel), var(--bg-elev));
  padding: 1.4rem 1.5rem; position: relative;
  transition: border-color .2s ease, transform .2s ease, box-shadow .2s ease;
}
.project::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 2px;
  background: linear-gradient(var(--green), var(--cyan)); border-radius: var(--radius) 0 0 var(--radius);
  opacity: .35; transition: opacity .2s;
}
.project:hover { border-color: var(--border-lit); transform: translateY(-3px); box-shadow: 0 18px 40px -28px rgba(0,0,0,0.9); }
.project:hover::before { opacity: 1; }
.project-top { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.project-name { font-size: 1.15rem; color: var(--green); font-weight: 600; }
.project-link { font-size: 1.2rem; color: var(--text-dim); }
.project-link:hover { color: var(--cyan); }
.project-desc { color: var(--text-dim); margin: .7rem 0 1rem; max-width: 68ch; }

/* ---------- Experience ---------- */
.timeline { list-style: none; position: relative; padding-left: 1.5rem; }
.timeline::before { content: ""; position: absolute; left: 4px; top: 6px; bottom: 6px; width: 1px; background: var(--border-lit); }
.tl-item { position: relative; padding-bottom: 1.8rem; }
.tl-item:last-child { padding-bottom: 0; }
.tl-dot { position: absolute; left: -1.5rem; top: 7px; width: 9px; height: 9px; border-radius: 50%; background: var(--green); box-shadow: var(--glow); }
.tl-role { font-size: 1.02rem; color: var(--text); font-weight: 600; }
.tl-co { color: var(--cyan); font-weight: 500; }
.tl-date { color: var(--muted); font-size: .82rem; margin: .1rem 0 .5rem; }
.tl-desc { color: var(--text-dim); max-width: 68ch; }

/* ---------- Writing ---------- */
.writing { display: grid; gap: 1rem; }
.post-card {
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--panel); padding: 1.4rem 1.5rem; position: relative;
  transition: border-color .2s, transform .2s;
}
.post-featured { border-color: var(--border-lit); }
.post-card:hover { transform: translateY(-2px); border-color: var(--green-dim); }
.post-status {
  position: absolute; top: 1.1rem; right: 1.3rem; font-size: .7rem; color: var(--amber);
  border: 1px solid rgba(230,192,123,0.4); border-radius: 999px; padding: .15rem .6rem;
}
.post-title { font-size: 1.15rem; color: var(--text); margin-bottom: .5rem; max-width: 40ch; }
.post-excerpt { color: var(--text-dim); max-width: 66ch; }
.post-meta { color: var(--muted); font-size: .8rem; margin-top: .8rem; }
.writing-note { color: var(--muted); font-size: .85rem; }
.writing-note .prompt { color: var(--cyan); }

/* ---------- Contact ---------- */
.contact-line { color: var(--text); margin-bottom: 1.3rem; }
.contact-list { list-style: none; display: grid; gap: .7rem; max-width: 540px; }
.contact-list li { display: flex; align-items: baseline; gap: 1rem; border-bottom: 1px dashed var(--border); padding-bottom: .7rem; }
.ck { color: var(--green); min-width: 90px; font-size: .85rem; }
.ck::before { content: "> "; color: var(--muted); }

/* ---------- Footer ---------- */
.footer {
  max-width: var(--maxw); margin: 0 auto;
  padding: 2rem clamp(1rem, 5vw, 3rem) 3rem; border-top: 1px solid var(--border);
  color: var(--muted); font-size: .82rem;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 760px) {
  .resume-btn { display: none; }
  .nav-toggle { display: flex; }
  .nav-links {
    position: absolute; top: 100%; left: 0; right: 0; flex-direction: column;
    gap: 0; background: var(--bg-elev); border-bottom: 1px solid var(--border);
    max-height: 0; overflow: hidden; transition: max-height .3s ease; margin-left: 0;
  }
  .nav-links.open { max-height: 320px; }
  .nav-links a { padding: .9rem clamp(1rem, 5vw, 3rem); border-top: 1px solid var(--border); width: 100%; }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
}

/* ============================================================
   REDUCED MOTION: drop CRT shimmer + animations
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .scanlines { display: none; }
  .cursor { animation: none; }
  [data-reveal] { opacity: 1; transform: none; }
  * { transition: none !important; }
}