/* ============================================================
   Base & Variables
   ============================================================ */
:root {
  --bg:          #0a0d12;
  --bg-alt:      #0e1219;
  --surface:     #131820;
  --surface-2:   #1a2030;
  --border:      #1e2a3a;
  --border-2:    #243040;
  --accent:      #00c8ff;
  --accent-dim:  #00c8ff22;
  --accent-2:    #0070e0;
  --text:        #e2e8f0;
  --text-muted:  #7a8a9e;
  --text-dim:    #4a5a6e;
  --font-sans:   'Inter', system-ui, sans-serif;
  --font-mono:   'JetBrains Mono', 'Fira Code', monospace;
  --radius:      8px;
  --radius-lg:   16px;
  --transition:  0.2s ease;
  --glow:        0 0 24px rgba(0, 200, 255, 0.15);
  --shadow:      0 4px 24px rgba(0, 0, 0, 0.5);
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: #ffffff; }

ul { list-style: none; }

/* ============================================================
   Layout
   ============================================================ */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 7rem 0;
}

.section-alt {
  background: var(--bg-alt);
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
  opacity: 0.85;
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  color: #fff;
  margin-bottom: 2.5rem;
  letter-spacing: -0.02em;
}

.section-intro {
  max-width: 680px;
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 3rem;
  line-height: 1.75;
}

/* ============================================================
   Navigation
   ============================================================ */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 13, 18, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}

#navbar.scrolled {
  box-shadow: 0 2px 20px rgba(0,0,0,0.6);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.05em;
}
.nav-brand:hover { color: #fff; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius);
  transition: color var(--transition), background var(--transition);
}
.nav-links a:hover { color: #fff; background: var(--surface-2); }

.nav-links .nav-cta {
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid rgba(0, 200, 255, 0.25);
}
.nav-links .nav-cta:hover {
  background: var(--accent);
  color: #000;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-muted);
  border-radius: 2px;
  transition: var(--transition);
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.6rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: #000;
}
.btn-primary:hover {
  background: #ffffff;
  color: #000;
  box-shadow: var(--glow);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border-2);
}
.btn-ghost:hover {
  color: #fff;
  border-color: var(--text-muted);
  background: var(--surface);
}

/* ============================================================
   Hero
   ============================================================ */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 64px;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,200,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,200,255,0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black, transparent);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
  opacity: 0.85;
}

#hero h1 {
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: #fff;
  margin-bottom: 1.5rem;
}

#hero h1 .accent {
  color: var(--accent);
}

.hero-sub {
  max-width: 580px;
  color: var(--text-muted);
  font-size: 1.1rem;
  line-height: 1.75;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.hero-tags span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0.3rem 0.75rem;
  border-radius: 4px;
  letter-spacing: 0.04em;
}

.scroll-hint {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  opacity: 0.35;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, transparent, var(--text-muted));
  animation: scrollPulse 2s ease infinite;
}

.scroll-text {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

/* ============================================================
   About
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 4rem;
  align-items: start;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  font-size: 1.025rem;
  line-height: 1.8;
}

.about-text p strong {
  color: var(--accent);
  font-weight: 600;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.stat {
  background: var(--surface);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.stat-num {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ============================================================
   Timeline / Experience
   ============================================================ */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--accent), var(--border), transparent);
}

.timeline-item {
  position: relative;
  margin-bottom: 3rem;
  padding-left: 2rem;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-marker {
  position: absolute;
  left: -2rem;
  top: 8px;
  width: 9px;
  height: 9px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 3px var(--bg-alt), 0 0 0 4px var(--accent);
  transform: translateX(-4px);
}

.timeline-content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 2rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.timeline-content:hover {
  border-color: var(--border-2);
  box-shadow: var(--shadow);
}

.timeline-meta {
  display: flex;
  gap: 1rem;
  align-items: center;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.04em;
}

.timeline-company {
  font-size: 0.8rem;
  color: var(--text-dim);
  font-weight: 500;
}

.timeline-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 0.75rem;
}

.timeline-content ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.timeline-content ul li {
  font-size: 0.88rem;
  color: var(--text-muted);
  padding-left: 1rem;
  position: relative;
  line-height: 1.6;
}

.timeline-content ul li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

/* ============================================================
   Skills
   ============================================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.skill-group {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: border-color var(--transition);
}

.skill-group:hover {
  border-color: var(--border-2);
}

.skill-group h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 1rem;
  font-family: var(--font-mono);
}

.skill-group ul {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.skill-group ul li {
  font-size: 0.9rem;
  color: var(--text-muted);
  padding-left: 0.875rem;
  position: relative;
}

.skill-group ul li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--text-dim);
  font-size: 0.7rem;
  top: 0.1em;
}

/* ============================================================
   Certifications
   ============================================================ */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin-bottom: 3.5rem;
}

.cert-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.cert-card:hover {
  border-color: var(--border-2);
  box-shadow: var(--shadow);
}

.cert-card.cert-primary {
  border-color: rgba(0, 200, 255, 0.2);
  background: linear-gradient(135deg, var(--surface), rgba(0,200,255,0.04));
}

.cert-icon {
  color: var(--accent);
  font-size: 0.6rem;
  padding-top: 0.35rem;
  flex-shrink: 0;
}

.cert-body h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 0.35rem;
}

.cert-body p {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.awards {
  border-top: 1px solid var(--border);
  padding-top: 2.5rem;
}

.awards h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1.25rem;
}

.awards-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.awards-list span {
  font-size: 0.8rem;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius);
}

/* ============================================================
   Consultancy / Services
   ============================================================ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.service-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  position: relative;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.service-card:hover {
  border-color: rgba(0, 200, 255, 0.3);
  transform: translateY(-2px);
  box-shadow: var(--glow), var(--shadow);
}

.service-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
  opacity: 0.6;
}

.service-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 0.85rem;
  line-height: 1.3;
}

.service-card > p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.service-delivers {
  border-top: 1px solid var(--border);
  padding-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.service-delivers li {
  font-size: 0.8rem;
  color: var(--text-dim);
  padding-left: 0.875rem;
  position: relative;
}

.service-delivers li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.65rem;
  top: 0.15em;
}

.engagement-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
}

.engagement-box h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 2rem;
}

.engagement-types {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
}

.engagement-type h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 0.5rem;
}

.engagement-type p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ============================================================
   Contact
   ============================================================ */
.contact-container {}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 4rem;
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.contact-item {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
}

.contact-item a,
.contact-item span {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.contact-item a:hover { color: #fff; }

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.contact-form input,
.contact-form textarea {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  width: 100%;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 200, 255, 0.1);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: var(--text-dim);
}

.contact-form textarea {
  resize: vertical;
  min-height: 130px;
}

.contact-form .btn {
  align-self: flex-start;
}

.form-note {
  font-size: 0.85rem;
  color: var(--accent);
  min-height: 1.25rem;
}

/* ============================================================
   Footer
   ============================================================ */
footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 2rem 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-brand {
  font-weight: 600;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-copy,
.footer-tagline {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 768px) {
  section { padding: 5rem 0; }

  .nav-toggle { display: flex; }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-alt);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem;
    gap: 0.25rem;
  }

  .nav-links.open { display: flex; }
  .nav-links a { width: 100%; padding: 0.6rem 1rem; }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .about-stats {
    max-width: 360px;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .form-row { grid-template-columns: 1fr; }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .hero-actions { flex-direction: column; }

  .timeline { padding-left: 1rem; }
  .timeline-item { padding-left: 1.5rem; }
  .timeline-content { padding: 1.25rem; }
}

@media (max-width: 480px) {
  .container { padding: 0 1.25rem; }
  #hero h1 { font-size: 2.5rem; }
  .services-grid { grid-template-columns: 1fr; }
  .certs-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   Animations
   ============================================================ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero-content > * {
  animation: fadeUp 0.6s ease both;
}
.hero-label   { animation-delay: 0.1s; }
#hero h1      { animation-delay: 0.2s; }
.hero-sub     { animation-delay: 0.3s; }
.hero-actions { animation-delay: 0.4s; }
.hero-tags    { animation-delay: 0.5s; }