/* ═══════════════════════════════════════════════════════
   BASE — Variables, Reset, Typography, Utilities,
          Animations, Shared Components
   css/base.css
══════════════════════════════════════════════════════ */

/* ── CSS Custom Properties ──────────────────────────── */
:root {
  --bg:         #0a0e17;
  --bg2:        #0d1321;
  --card:       #131b2e;
  --card2:      #0f1728;
  --border:     #1e2d45;
  --green:      #00ff88;
  --cyan:       #00d4ff;
  --purple:     #7c3aed;
  --red:        #ef4444;
  --text:       #e2e8f0;
  --muted:      #64748b;
  --font-mono:  'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  --font-sans:  'Inter', system-ui, -apple-system, sans-serif;
  --transition: .3s cubic-bezier(.4,0,.2,1);
  --radius:     10px;
  --radius-lg:  14px;
  --shadow:     0 4px 24px rgba(0,0,0,.45);
}

/* ── Reset ──────────────────────────────────────────── */
*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html  { scroll-behavior: smooth; font-size: 16px; }
body  {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.65;
  overflow-x: hidden;
}
img,video,svg { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }
ul { list-style: none; }

/* ── Scrollbar ──────────────────────────────────────── */
::-webkit-scrollbar       { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--green); border-radius: 3px; }

/* ── Selection ──────────────────────────────────────── */
::selection { background: rgba(0,255,136,.25); color: var(--green); }

/* ── Typography ─────────────────────────────────────── */
h1,h2,h3,h4 { font-weight: 700; line-height: 1.2; }
a { color: var(--green); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--cyan); }

/* ── Noise Overlay ──────────────────────────────────── */
body::before {
  content: '';
  position: fixed; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  opacity: .35;
}

/* ── Section Wrapper ────────────────────────────────── */
section {
  padding: 5.5rem 0;
  position: relative;
  overflow: hidden;
}
/* Subtle separator between sections */
section:not(#home) {
  border-top: 1px solid rgba(255,255,255,.04);
}

/* ── Section Backgrounds ────────────────────────────── */
#home       { background: var(--bg);  }
#about      { background: var(--bg2); }
#experience { background: var(--bg);  }
#skills     { background: var(--bg2); }
#tools      { background: var(--bg);  }
#education  { background: var(--bg2); }
#training   { background: var(--bg);  }
#contact    { background: var(--bg2); }

/* ── Container ──────────────────────────────────────── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
  width: 100%;
}

/* ── Section Header ─────────────────────────────────── */
.section-header { margin-bottom: 3rem; }
.section-tag {
  display: block;
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--green);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: .5rem;
}
.section-title {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  color: var(--text);
}
.section-title span { color: var(--green); }
.section-line {
  width: 50px; height: 2px;
  background: linear-gradient(90deg, var(--green), transparent);
  margin-top: .75rem;
}

/* ── Buttons ────────────────────────────────────────── */
.btn-primary {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .75rem 1.75rem;
  background: var(--green); color: #0a0e17;
  font-weight: 700; font-size: .9rem;
  border: 1px solid var(--green); border-radius: 6px;
  transition: all var(--transition);
}
.btn-primary:hover {
  background: transparent; color: var(--green);
  box-shadow: 0 0 24px rgba(0,255,136,.3);
}
.btn-outline {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .75rem 1.75rem;
  background: transparent; color: var(--text);
  font-weight: 500; font-size: .9rem;
  border: 1px solid var(--border); border-radius: 6px;
  transition: all var(--transition);
}
.btn-outline:hover { border-color: var(--green); color: var(--green); }
.btn-full { width: 100%; justify-content: center; }

/* ── Generic Tags ───────────────────────────────────── */
.tag {
  font-family: var(--font-mono); font-size: .72rem;
  padding: .3rem .75rem;
  background: rgba(0,255,136,.07);
  border: 1px solid rgba(0,255,136,.2);
  border-radius: 4px; color: var(--green);
}
.required { color: var(--red); font-size: .8em; }

/* ── Scroll To Top ──────────────────────────────────── */
.scroll-top {
  position: fixed; bottom: 1.5rem; right: 1.5rem; z-index: 900;
  width: 40px; height: 40px;
  background: var(--card);
  border: 1px solid rgba(0,255,136,.3);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: var(--green); font-size: 1rem;
  opacity: 0; pointer-events: none;
  transition: all var(--transition);
}
.scroll-top.visible { opacity: 1; pointer-events: auto; }
.scroll-top:hover { background: rgba(0,255,136,.1); transform: translateY(-3px); }

/* ── Scroll Reveal ──────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.visible { opacity: 1; transform: none; }

/* ── Particle Canvas ────────────────────────────────── */
.particle-canvas { position: absolute; inset: 0; pointer-events: none; z-index: 0; }

/* ── Terminal Card ──────────────────────────────────── */
.terminal-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden; margin: 2rem 0;
}
.terminal-header {
  display: flex; align-items: center; gap: .5rem;
  padding: .6rem 1rem;
  background: rgba(255,255,255,.04);
  border-bottom: 1px solid var(--border);
}
.t-dot { width: 12px; height: 12px; border-radius: 50%; flex-shrink: 0; }
.t-red    { background: #ef4444; }
.t-yellow { background: #f59e0b; }
.t-green  { background: #10b981; }
.terminal-title {
  font-family: var(--font-mono); font-size: .72rem;
  color: var(--muted); margin-left: .25rem;
}
.terminal-body {
  padding: 1.25rem;
  font-family: var(--font-mono); font-size: .83rem;
  line-height: 1.8; color: var(--muted);
}
.t-cmd            { color: var(--green); }
.t-output         { color: var(--text); padding-left: .5rem; }
.t-output.t-success { color: var(--green); }

/* ── Glitch Effect ──────────────────────────────────── */
.glitch { position: relative; }
.glitch::before,
.glitch::after {
  content: attr(data-text);
  position: absolute; left: 0; top: 0;
  width: 100%; overflow: hidden;
  background: var(--bg);
  /* Hidden by default — animation reveals slices during the glitch flash.
     Without this, the opaque pseudo-elements cover the gradient name text
     during the animation delay and at the 0%/100% keyframe. */
  clip-path: inset(50% 0 50% 0);
}
.glitch::before {
  left: 2px; text-shadow: -1px 0 var(--red);
  animation: glitch 5s infinite 1s;
}
.glitch::after {
  left: -2px; text-shadow: 1px 0 var(--cyan);
  animation: glitch 5s infinite 1.5s reverse;
}

/* ── Nav Overlay ────────────────────────────────────── */
.nav-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.65);
  z-index: 998;
  display: none;
}
.nav-overlay.visible { display: block; }

/* ── Keyframes ──────────────────────────────────────── */
@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-16px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateX(-10px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes blink {
  0%,100% { opacity: 1; }
  50%     { opacity: 0; }
}
@keyframes pulse {
  0%,100% { opacity: 1; }
  50%     { opacity: .45; }
}
@keyframes rotateBorder {
  from { filter: hue-rotate(0deg); }
  to   { filter: hue-rotate(360deg); }
}
@keyframes glitch {
  0%,100% { clip-path: inset(50% 0 50% 0); transform: none; }
  20%     { clip-path: inset(20% 0 30% 0); transform: translate(-3px); }
  40%     { clip-path: inset(50% 0 20% 0); transform: translate(3px); }
  60%     { clip-path: inset(10% 0 60% 0); transform: translate(-2px); }
  80%     { clip-path: inset(70% 0 5%  0); transform: translate(2px); }
}