/* ─── Reset & Tokens ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0b0f1a;
  --surface:   #111827;
  --card:      #1a2235;
  --border:    #1e2d45;
  --accent:    #00d4ff;
  --accent2:   #7c3aed;
  --text:      #e2e8f0;
  --muted:     #94a3b8;
  --radius:    10px;
  --font:      'Segoe UI', system-ui, sans-serif;
  --mono:      'Courier New', monospace;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
}

/* ─── Typography ─── */
h1 { font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 800; line-height: 1.15; }
h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); font-weight: 700; line-height: 1.25; }
h3 { font-size: 1.2rem; font-weight: 600; }
p  { color: var(--muted); }
a  { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.accent  { color: var(--accent); }
.accent2 { color: var(--accent2); }
.mono    { font-family: var(--mono); font-size: 0.9em; color: var(--accent); }

/* ─── Layout ─── */
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
section    { padding: 90px 0; }
.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(0,212,255,0.08);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: 100px;
  padding: 4px 14px;
  margin-bottom: 18px;
}

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}
.btn-primary {
  background: var(--accent);
  color: #0b0f1a;
}
.btn-primary:hover { background: #33dcff; text-decoration: none; transform: translateY(-1px); }

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1.5px solid var(--accent);
}
.btn-outline:hover { background: rgba(0,212,255,0.08); text-decoration: none; transform: translateY(-1px); }

.btn-purple {
  background: var(--accent2);
  color: #fff;
}
.btn-purple:hover { background: #6d28d9; text-decoration: none; transform: translateY(-1px); }

/* ─── Nav ─── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11,15,26,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  position: relative; /* Context for mobile positioning */
}
.nav-logo {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-logo .dot { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 28px; list-style: none; }
.nav-links a {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-links .nav-cta {
  background: var(--accent);
  color: #0b0f1a;
  padding: 8px 18px;
  border-radius: var(--radius);
  font-weight: 600;
}
.nav-links .nav-cta:hover { background: #33dcff; }

/* Hamburger Button Styling (Hidden on Desktop) */
.nav-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 10px;
}
.hamburger {
  display: block;
  position: relative;
  width: 24px;
  height: 2px;
  background: var(--text);
}
.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 2px;
  background: var(--text);
  left: 0;
}
.hamburger::before { top: -8px; }
.hamburger::after { bottom: -8px; }

/* ─── Hero ─── */
#home {
  min-height: calc(100vh - 64px);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-eyebrow {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.hero-eyebrow::before {
  content: '';
  display: inline-block;
  width: 28px;
  height: 2px;
  background: var(--accent);
}
.hero-title { margin-bottom: 20px; }
.hero-subtitle { font-size: 1.1rem; margin-bottom: 32px; max-width: 480px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats {
  display: flex;
  gap: 36px;
  border-top: 1px solid var(--border);
  padding-top: 28px;
}
.stat-num { font-size: 1.6rem; font-weight: 800; color: var(--text); }
.stat-label { font-size: 0.8rem; color: var(--muted); }

/* PCB Visual Placeholder */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}
.pcb-card {
  width: 380px;
  height: 380px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  position: relative;
  overflow: hidden;
}
.pcb-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(0deg, transparent, transparent 39px, rgba(0,212,255,0.04) 40px),
    repeating-linear-gradient(90deg, transparent, transparent 39px, rgba(0,212,255,0.04) 40px);
}
.pcb-chip {
  width: 100px;
  height: 100px;
  background: var(--surface);
  border: 2px solid var(--accent);
  border-radius: 8px;
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}
.pcb-chip::before, .pcb-chip::after {
  content: '';
  position: absolute;
  left: -18px;
  right: -18px;
  height: 2px;
  background: var(--accent);
  opacity: 0.4;
}
.pcb-chip::before { top: 28px; }
.pcb-chip::after  { bottom: 28px; }
.chip-label { font-family: var(--mono); font-size: 0.7rem; color: var(--accent); z-index: 1; }
.pcb-tag {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent);
  background: rgba(0,212,255,0.08);
  border: 1px solid rgba(0,212,255,0.2);
  padding: 4px 12px;
  border-radius: 4px;
  z-index: 1;
}

/* ─── Divider ─── */
.divider { border: none; border-top: 1px solid var(--border); }

/* ─── Skills / Expertise ─── */
#expertise { background: var(--surface); }
.expertise-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 48px; }
.expertise-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.2s, transform 0.2s;
}
.expertise-card:hover { border-color: var(--accent); transform: translateY(-3px); }
.card-icon { font-size: 1.8rem; margin-bottom: 14px; }
.card-title { color: var(--text); margin-bottom: 8px; }
.skill-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.tag {
  font-size: 0.72rem;
  font-weight: 600;
  background: rgba(0,212,255,0.07);
  border: 1px solid rgba(0,212,255,0.15);
  color: var(--accent);
  padding: 3px 10px;
  border-radius: 4px;
  font-family: var(--mono);
}

/* ─── Projects ─── */
.projects-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; margin-top: 48px; }
.project-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s, transform 0.2s;
}
.project-card:hover { border-color: var(--accent); transform: translateY(-3px); }
.project-img {
  height: 160px;
  background: linear-gradient(135deg, var(--surface), var(--border));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  border-bottom: 1px solid var(--border);
}
.project-body { padding: 24px; }
.project-status {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 100px;
  margin-bottom: 10px;
}
.status-complete { background: rgba(34,197,94,0.12); color: #4ade80; border: 1px solid rgba(34,197,94,0.2); }
.status-progress { background: rgba(251,191,36,0.1); color: #fbbf24; border: 1px solid rgba(251,191,36,0.2); }
.project-title { color: var(--text); margin-bottom: 8px; }
.project-meta { font-size: 0.82rem; color: var(--muted); }

/* ─── Blog ─── */
#blog { background: var(--surface); }
.blog-header { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: 48px; }
.blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.blog-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s, transform 0.2s;
}
.blog-card:hover { border-color: var(--accent); transform: translateY(-3px); }
.blog-img {
  height: 120px;
  background: linear-gradient(135deg, var(--bg), var(--border));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  border-bottom: 1px solid var(--border);
}
.blog-body { padding: 20px; }
.blog-meta { font-size: 0.75rem; color: var(--muted); margin-bottom: 8px; font-family: var(--mono); }
.blog-title { color: var(--text); font-size: 1rem; margin-bottom: 8px; }
.blog-excerpt { font-size: 0.85rem; margin-bottom: 14px; }
.blog-link { font-size: 0.85rem; font-weight: 600; color: var(--accent); }

/* Subscribe Banner */
.subscribe-banner {
  margin-top: 60px;
  background: linear-gradient(135deg, rgba(0,212,255,0.07), rgba(124,58,237,0.07));
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}
.subscribe-copy h3 { font-size: 1.4rem; color: var(--text); margin-bottom: 6px; }
.subscribe-form { display: flex; gap: 12px; flex-wrap: wrap; }
.subscribe-form input {
  padding: 12px 18px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.9rem;
  width: 260px;
  outline: none;
  transition: border-color 0.2s;
}
.subscribe-form input:focus { border-color: var(--accent); }
.subscribe-form input::placeholder { color: var(--muted); }

/* ─── Resume Page ─── */
#resume { }
.resume-layout { display: grid; grid-template-columns: 2fr 1fr; gap: 48px; margin-top: 48px; }
.resume-section { margin-bottom: 40px; }
.resume-section-title {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  border-bottom: 1px solid var(--border);
  padding-bottom: 10px;
  margin-bottom: 20px;
}
.exp-item { margin-bottom: 26px; }
.exp-header { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 8px; margin-bottom: 4px; }
.exp-role { font-size: 1rem; font-weight: 600; color: var(--text); }
.exp-date { font-size: 0.8rem; font-family: var(--mono); color: var(--accent); }
.exp-company { font-size: 0.85rem; color: var(--muted); margin-bottom: 8px; }
.exp-bullets { list-style: none; }
.exp-bullets li {
  font-size: 0.875rem;
  color: var(--muted);
  padding: 3px 0;
  padding-left: 14px;
  position: relative;
}
.exp-bullets li::before { content: '▸'; position: absolute; left: 0; color: var(--accent); font-size: 0.7rem; top: 5px; }

.resume-sidebar { }
.sidebar-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 24px;
}
.sidebar-card h3 { font-size: 0.85rem; color: var(--text); margin-bottom: 14px; }
.skill-bar-wrap { margin-bottom: 12px; }
.skill-bar-label { display: flex; justify-content: space-between; font-size: 0.78rem; color: var(--muted); margin-bottom: 5px; }
.skill-bar-bg { background: var(--border); border-radius: 100px; height: 5px; }
.skill-bar-fill { height: 5px; border-radius: 100px; background: linear-gradient(90deg, var(--accent), var(--accent2)); }

.tool-list { display: flex; flex-wrap: wrap; gap: 8px; }
.resume-download-box {
  background: linear-gradient(135deg, rgba(0,212,255,0.08), rgba(124,58,237,0.08));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
}
.resume-download-box h3 { color: var(--text); margin-bottom: 6px; }
.resume-download-box p { font-size: 0.85rem; margin-bottom: 20px; }

/* ─── Hire / Contact ─── */
#contact { background: var(--surface); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; margin-top: 48px; }
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 0.8rem; font-weight: 600; color: var(--muted); }
.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 16px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.9rem;
  font-family: var(--font);
  outline: none;
  transition: border-color 0.2s;
  resize: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--accent); }
.form-group textarea { min-height: 130px; }
.form-group select option { background: var(--card); }
.contact-info-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}
.contact-icon { font-size: 1.2rem; min-width: 28px; margin-top: 2px; }
.contact-detail-label { font-size: 0.75rem; color: var(--muted); margin-bottom: 2px; }
.contact-detail-val { font-size: 0.9rem; font-weight: 500; color: var(--text); }
.availability-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  color: #4ade80;
  background: rgba(34,197,94,0.1);
  border: 1px solid rgba(34,197,94,0.2);
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 24px;
}
.availability-badge::before { content: ''; display: inline-block; width: 7px; height: 7px; background: #4ade80; border-radius: 50%; animation: pulse 2s infinite; }
@keyframes pulse { 0%,100%{opacity:1;} 50%{opacity:0.4;} }

/* ─── Footer ─── */
footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 40px 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-copy { font-size: 0.82rem; color: var(--muted); }
.footer-links { display: flex; gap: 24px; }
.footer-links a { font-size: 0.82rem; color: var(--muted); }
.footer-links a:hover { color: var(--accent); text-decoration: none; }

/* ─── Page Sections (hidden/shown via JS) ─── */
.page-section { display: none; }
.page-section.active { display: block; }
#home.page-section { display: none; }
#home.page-section.active { display: flex; }


/* ─── Responsive ─── */
@media (max-width: 820px) {
  .hero-grid        { grid-template-columns: 1fr; }
  .hero-visual      { display: none; }
  .expertise-grid   { grid-template-columns: 1fr; }
  .projects-grid    { grid-template-columns: 1fr; }
  .blog-grid        { grid-template-columns: 1fr; }
  .blog-header      { flex-direction: column; align-items: flex-start; gap: 16px; }
  .subscribe-banner { flex-direction: column; }
  .resume-layout    { grid-template-columns: 1fr; }
  .contact-grid     { grid-template-columns: 1fr; }
  .form-row         { grid-template-columns: 1fr; }
  
  /* Show hamburger button on mobile */
  .nav-toggle {
    display: block;
  }

  /* Transform links into a full-width dropdown menu */
  .nav-links {
    display: none; /* Hidden by default on mobile */
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
    position: absolute;
    top: 64px; /* Sits directly beneath the header height */
    left: 0;
    width: 100%;
    background: rgba(11,15,26,0.98); /* Solid dark background */
    padding: 24px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 10px 15px rgba(0,0,0,0.5);
  }

  /* Class triggered by JavaScript to open the menu */
  .nav-links.active {
    display: flex;
  }
}