/* ============================================================
   SUBHABRATA KHARA — GLOBAL STYLES
   Terminal / Cyberpunk Design System
   ============================================================ */

:root {
  --green:        #00ff88;
  --green-dim:    rgba(0, 255, 136, 0.6);
  --green-ghost:  rgba(0, 255, 136, 0.08);
  --green-border: rgba(0, 255, 136, 0.18);
  --cyan:         #00e5ff;
  --cyan-dim:     rgba(0, 229, 255, 0.5);
  --amber:        #ffb830;
  --red:          #ff4455;
  --dark:         #050a0f;
  --darker:       #020609;
  --card-bg:      rgba(0, 255, 136, 0.035);
  --card-hover:   rgba(0, 255, 136, 0.07);
  --text-primary: #c8fce5;
  --text-muted:   rgba(200, 252, 229, 0.8);
  --text-dim:     rgba(200, 252, 229, 0.55);
  --nav-h:        70px;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }

body {
  background: var(--dark);
  color: var(--text-primary);
  font-family: 'JetBrains Mono', monospace;
  overflow-x: hidden;
  cursor: crosshair;
  min-height: 100vh;
}

/* ---- Background Effects ---- */
.bg-grid {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(0,255,136,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,255,136,0.025) 1px, transparent 1px);
  background-size: 44px 44px;
  animation: gridDrift 25s linear infinite;
}
@keyframes gridDrift {
  0%   { background-position: 0 0; }
  100% { background-position: 44px 44px; }
}

.scanlines {
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  background: repeating-linear-gradient(
    0deg, transparent, transparent 2px,
    rgba(0,0,0,0.06) 2px, rgba(0,0,0,0.06) 4px
  );
}

.cursor-glow {
  position: fixed; width: 320px; height: 320px;
  border-radius: 50%; pointer-events: none; z-index: 2;
  background: radial-gradient(circle, rgba(0,255,136,0.055) 0%, transparent 70%);
  transform: translate(-50%, -50%);
  transition: opacity 0.4s;
}

/* ---- Navigation ---- */
nav {
  position: fixed; top: 0; width: 100%; height: var(--nav-h);
  z-index: 500;
  padding: 0 3.5rem;
  display: flex; align-items: center; justify-content: space-between;
  background: rgba(5, 10, 15, 0.88);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--green-border);
}

.nav-logo {
  font-family: 'Orbitron', monospace;
  font-size: 1.1rem; font-weight: 700;
  color: var(--green);
  text-decoration: none;
  letter-spacing: 2px;
}
.nav-logo .accent { color: var(--cyan); }
.nav-logo .logo-sub { font-size: 0.65rem; color: var(--text-muted); margin-left: 2px; vertical-align: middle; }

.nav-links {
  display: flex; align-items: center; gap: 0.2rem;
  list-style: none;
}

.nav-links a {
  display: inline-block;
  padding: 0.45rem 0.9rem;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.72rem;
  letter-spacing: 1px;
  transition: color 0.25s, background 0.25s;
  border-radius: 3px;
}
.nav-links a .nav-pre { color: var(--green); opacity: 0; transition: opacity 0.25s; }
.nav-links a:hover .nav-pre,
.nav-links a.active .nav-pre { opacity: 1; }
.nav-links a:hover, .nav-links a.active { color: var(--green); }
.nav-links a.active { background: var(--green-ghost); }

.nav-links a.btn-nav {
  background: transparent;
  color: var(--green);
  border: 1px solid var(--green-border);
  margin-left: 0.6rem;
  padding: 0.45rem 1.2rem;
  clip-path: polygon(6px 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
  font-weight: 700;
  letter-spacing: 1.5px;
}
.nav-links a.btn-nav:hover {
  background: var(--green); color: var(--darker);
  box-shadow: 0 0 20px rgba(0,255,136,0.4);
}

/* Hamburger */
.hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.hamburger span {
  display: block; width: 24px; height: 2px;
  background: var(--green); transition: all 0.3s;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---- Page wrapper ---- */
.page-wrap {
  position: relative; z-index: 10;
  padding-top: var(--nav-h);
  min-height: 100vh;
}

/* ---- Section utilities ---- */
.section { padding: 5rem 3.5rem; }
.section-sm { padding: 3rem 3.5rem; }

.section-label {
  font-size: 0.65rem; letter-spacing: 4px;
  color: var(--green); text-transform: uppercase;
  margin-bottom: 0.6rem;
}
.section-title {
  font-family: 'Orbitron', monospace;
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 700; color: #fff;
  margin-bottom: 1rem;
}
.section-sub {
  font-size: 0.82rem; color: var(--text-muted);
  line-height: 1.8; max-width: 600px;
}

/* ---- Buttons ---- */
.btn {
  display: inline-block;
  padding: 0.75rem 2rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem; font-weight: 700;
  letter-spacing: 2px; text-transform: lowercase;
  text-decoration: none; border: none; cursor: pointer;
  transition: all 0.3s; position: relative; overflow: hidden;
}
.btn-primary {
  background: var(--green); color: var(--darker);
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}
.btn-primary:hover {
  background: #fff;
  box-shadow: 0 0 30px rgba(0,255,136,0.5);
  transform: translateY(-2px);
}
.btn-outline {
  background: transparent; color: var(--green);
  border: 1px solid var(--green-border);
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}
.btn-outline:hover {
  border-color: var(--green);
  background: var(--green-ghost);
  box-shadow: 0 0 20px rgba(0,255,136,0.15);
  transform: translateY(-2px);
}
.btn-cyan {
  background: var(--cyan); color: var(--darker);
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}
.btn-cyan:hover {
  background: #fff;
  box-shadow: 0 0 30px rgba(0,229,255,0.5);
  transform: translateY(-2px);
}

/* ---- Cards ---- */
.card {
  background: var(--card-bg);
  border: 1px solid var(--green-border);
  padding: 2rem;
  position: relative;
  transition: all 0.35s;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--green), var(--cyan));
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.4s;
}
.card:hover { background: var(--card-hover); border-color: rgba(0,255,136,0.35); }
.card:hover::before { transform: scaleX(1); }

.card-label {
  font-size: 0.6rem; letter-spacing: 3px;
  color: var(--cyan); text-transform: uppercase;
  margin-bottom: 0.6rem;
}
.card-title {
  font-family: 'Orbitron', monospace;
  font-size: 0.95rem; font-weight: 700;
  color: #fff; margin-bottom: 0.5rem; line-height: 1.4;
}
.card-desc {
  font-size: 0.75rem; color: var(--text-muted); line-height: 1.8;
}

/* Tags/chips */
.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 1rem; }
.tag {
  padding: 0.25rem 0.75rem;
  border: 1px solid var(--green-border);
  color: var(--text-dim); font-size: 0.62rem;
  letter-spacing: 1px; transition: all 0.25s;
}
.tag:hover { border-color: var(--green); color: var(--green); }
.tag-cyan { border-color: rgba(0,229,255,0.2); color: var(--cyan-dim); }
.tag-amber { border-color: rgba(255,184,48,0.2); color: rgba(255,184,48,0.6); }

/* ---- Terminal box ---- */
.terminal {
  background: rgba(2, 6, 9, 0.95);
  border: 1px solid var(--green-border);
  border-radius: 4px; overflow: hidden;
  box-shadow: 0 0 50px rgba(0,255,136,0.06);
}
.terminal-bar {
  background: rgba(0,255,136,0.07);
  padding: 0.55rem 1rem;
  display: flex; align-items: center; gap: 0.5rem;
  border-bottom: 1px solid var(--green-border);
}
.t-dot { width: 10px; height: 10px; border-radius: 50%; }
.t-dot.r { background: #ff5f57; }
.t-dot.y { background: #febc2e; }
.t-dot.g { background: #28c840; }
.terminal-title {
  flex: 1; text-align: center;
  font-size: 0.62rem; color: var(--text-dim); letter-spacing: 1px;
}
.terminal-body { padding: 1.5rem; font-size: 0.72rem; line-height: 2.1; }
.t-line { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.t-prompt { color: var(--green); flex-shrink: 0; }
.t-cmd { color: #fff; }
.t-out { color: var(--text-muted); padding-left: 1.2rem; }
.t-val { color: var(--cyan); }
.t-str { color: var(--amber); }
.t-comment { color: var(--text-dim); }
.t-err { color: var(--red); }
.cursor-blink {
  display: inline-block; width: 2px; height: 1.1em;
  background: var(--green); animation: blink 1s step-end infinite;
  vertical-align: middle; margin-left: 2px;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

/* ---- Pulse dot ---- */
.pulse-dot {
  display: inline-block; width: 7px; height: 7px;
  border-radius: 50%; background: var(--green);
  box-shadow: 0 0 8px var(--green);
  animation: pulseDot 2s ease-in-out infinite;
  margin-right: 6px;
}
@keyframes pulseDot {
  0%,100%{ opacity:1; box-shadow: 0 0 8px var(--green); }
  50%{ opacity:0.4; box-shadow: 0 0 2px var(--green); }
}

/* ---- Footer ---- */
footer {
  position: relative; z-index: 10;
  border-top: 1px solid var(--green-border);
  background: var(--darker);
  padding: 3rem 3.5rem;
}
.footer-inner {
  display: flex; align-items: center;
  justify-content: space-between; flex-wrap: wrap; gap: 1.5rem;
}
.footer-logo {
  font-family: 'Orbitron', monospace;
  font-size: 1.1rem; font-weight: 700; color: var(--green);
}
.footer-tagline { font-size: 0.65rem; color: var(--text-dim); margin-top: 0.3rem; }
.footer-links { display: flex; gap: 1.5rem; }
.footer-link {
  color: var(--text-muted); text-decoration: none;
  font-size: 0.72rem; letter-spacing: 1px;
  transition: color 0.25s;
}
.footer-link:hover { color: var(--green); }
.footer-copy { font-size: 0.65rem; color: var(--text-dim); }
.footer-status { font-size: 0.65rem; color: var(--text-muted); margin-top: 0.3rem; }

/* ---- Scroll reveal ---- */
.reveal {
  opacity: 0; transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ---- Page hero ---- */
.page-hero {
  padding: 4rem 3.5rem 2rem;
  border-bottom: 1px solid var(--green-border);
  background: linear-gradient(180deg, rgba(0,255,136,0.03) 0%, transparent 100%);
}
.page-hero .section-label { margin-bottom: 0.5rem; }
.page-hero h1 {
  font-family: 'Orbitron', monospace;
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900; color: #fff; line-height: 1.1;
  margin-bottom: 1rem;
}
.page-hero h1 span { color: var(--green); }
.page-hero p {
  font-size: 0.85rem; color: var(--text-muted);
  line-height: 1.8; max-width: 580px;
}

/* ---- Responsive ---- */
@media(max-width: 900px) {
  nav { padding: 0 1.5rem; }
  .nav-links { 
    display: none; flex-direction: column; 
    position: fixed; top: var(--nav-h); left: 0; right: 0;
    background: rgba(5,10,15,0.97); 
    border-bottom: 1px solid var(--green-border);
    padding: 1.5rem; gap: 0.5rem;
  }
  .nav-links.open { display: flex; }
  .hamburger { display: flex; }
  .section { padding: 4rem 1.5rem; }
  .section-sm { padding: 2rem 1.5rem; }
  .page-hero { padding: 3rem 1.5rem 2rem; }
  footer { padding: 2.5rem 1.5rem; }
  .footer-inner { flex-direction: column; gap: 1.5rem; }
}

@media(max-width: 600px) {
  .section-title { font-size: 1.5rem; }
}