/* ===== RESET & BASE ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #0a0a0f;
  --bg-card: #111118;
  --bg-card-hover: #16161f;
  --border: #1e1e2e;
  --accent: #7c6af7;
  --accent-glow: rgba(124, 106, 247, 0.15);
  --accent-light: #a89cf7;
  --text: #e2e2ef;
  --text-muted: #7a7a9a;
  --text-dim: #4a4a6a;
  --white: #ffffff;
  --font: 'Inter', system-ui, sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', monospace;
  --radius: 12px;
  --transition: 0.3s ease;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.7;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

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

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 10px; }

/* ===== SELECTION ===== */
::selection { background: var(--accent); color: var(--white); }

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4 {
  line-height: 1.2;
  font-weight: 700;
  color: var(--white);
}

/* ===== LAYOUT ===== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 100px 0;
}

/* ===== SECTION HEADER ===== */
.section-header {
  margin-bottom: 60px;
}

.section-label {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  color: var(--white);
}

.section-title span {
  color: var(--accent);
}

/* ===== NAV ===== */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 100;
  padding: 20px 0;
  transition: var(--transition);
}

nav.scrolled {
  background: rgba(10, 10, 15, 0.9);
  backdrop-filter: blur(12px);
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--mono);
  font-size: 1.1rem;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.05em;
}

.nav-logo span {
  color: var(--text-muted);
}

.nav-links {
  display: flex;
  gap: 36px;
  align-items: center;
}

.nav-links a {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width var(--transition);
}

.nav-links a:hover { color: var(--white); }
.nav-links a:hover::after { width: 100%; }

.nav-cta {
  padding: 8px 20px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  color: var(--accent) !important;
  font-size: 0.85rem !important;
  transition: background var(--transition), color var(--transition) !important;
}

.nav-cta:hover {
  background: var(--accent) !important;
  color: var(--white) !important;
}

.nav-cta::after { display: none !important; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

.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); }

/* ===== HERO ===== */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 0;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 70% 40%, rgba(124, 106, 247, 0.08) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 20% 60%, rgba(124, 106, 247, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(124,106,247,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124,106,247,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 750px;
}

.hero-greeting {
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.hero-greeting::before {
  content: '';
  display: inline-block;
  width: 30px;
  height: 1px;
  background: var(--accent);
}

.hero-name {
  font-size: clamp(2.5rem, 7vw, 5rem);
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.hero-role {
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  color: var(--accent-light);
  font-weight: 400;
  margin-bottom: 24px;
}

.hero-desc {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 520px;
  margin-bottom: 40px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--white);
  box-shadow: 0 0 30px rgba(124, 106, 247, 0.3);
}

.btn-primary:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 0 40px rgba(124, 106, 247, 0.5);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-dim);
  font-size: 0.75rem;
  font-family: var(--mono);
  letter-spacing: 0.1em;
  animation: bounce 2s infinite;
}

.hero-scroll svg {
  width: 16px;
  height: 16px;
  stroke: var(--text-dim);
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ===== ABOUT ===== */
#about {
  background: var(--bg);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 16px;
  line-height: 1.9;
}

.about-text p strong {
  color: var(--text);
}

.about-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 32px;
}

.highlight-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  transition: border-color var(--transition);
}

.highlight-item:hover {
  border-color: var(--accent);
}

.highlight-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 4px;
}

.highlight-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.about-visual {
  position: relative;
}

.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  position: relative;
  overflow: hidden;
}

.about-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  border-radius: 16px 16px 0 0;
}

.about-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 20px;
}

.about-card h3 {
  font-size: 1.2rem;
  margin-bottom: 4px;
}

.about-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.about-meta {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.meta-icon {
  width: 32px;
  height: 32px;
  background: var(--accent-glow);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  flex-shrink: 0;
}

/* ===== SKILLS ===== */
#skills {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.skill-category {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color var(--transition), transform var(--transition);
}

.skill-category:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.skill-cat-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.skill-cat-icon {
  width: 40px;
  height: 40px;
  background: var(--accent-glow);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.skill-cat-header h3 {
  font-size: 1rem;
  color: var(--white);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-tag {
  font-family: var(--mono);
  font-size: 0.78rem;
  padding: 5px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  color: var(--text-muted);
  transition: var(--transition);
}

.skill-tag:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}

/* ===== PROJECTS ===== */
#projects {
  background: var(--bg);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-6px);
}

.project-card:hover::before {
  opacity: 1;
}

.project-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
}

.project-icon {
  width: 44px;
  height: 44px;
  background: var(--accent-glow);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.project-links {
  display: flex;
  gap: 12px;
}

.project-link {
  color: var(--text-dim);
  transition: color var(--transition);
}

.project-link:hover { color: var(--accent); }

.project-link svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
}

.project-card h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.project-card p {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.7;
  flex: 1;
  margin-bottom: 20px;
}

.project-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.stack-tag {
  font-family: var(--mono);
  font-size: 0.72rem;
  padding: 3px 10px;
  background: var(--accent-glow);
  border: 1px solid rgba(124, 106, 247, 0.2);
  border-radius: 100px;
  color: var(--accent-light);
}

/* ===== EXPERIENCE ===== */
#experience {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.timeline {
  position: relative;
  padding-left: 28px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}

.timeline-item {
  position: relative;
  margin-bottom: 48px;
  padding-left: 32px;
}

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

.timeline-dot {
  position: absolute;
  left: -35px;
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--bg-card);
  box-shadow: 0 0 0 2px var(--accent);
}

.timeline-date {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.timeline-title {
  font-size: 1.1rem;
  color: var(--white);
  margin-bottom: 4px;
}

.timeline-org {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.timeline-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.8;
}

.timeline-desc li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 6px;
}

.timeline-desc li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* ===== CERTIFICATIONS ===== */
#certifications {
  background: var(--bg);
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.cert-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  transition: border-color var(--transition), transform var(--transition);
}

.cert-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.cert-logo {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.cert-cisco {
  background: rgba(0, 120, 212, 0.12);
  color: #4da6ff;
}

.cert-ibm {
  background: rgba(0, 62, 216, 0.12);
  color: #7eb3ff;
}

.cert-thm {
  background: rgba(175, 0, 0, 0.1);
  color: #ff6b6b;
}

.cert-alison {
  background: rgba(231, 76, 60, 0.1);
  color: #e74c3c;
}

.cert-info {
  flex: 1;
}

.cert-info h3 {
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.cert-info p {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.cert-tag {
  font-family: var(--mono);
  font-size: 0.72rem;
  padding: 3px 10px;
  background: var(--accent-glow);
  border: 1px solid rgba(124, 106, 247, 0.2);
  border-radius: 100px;
  color: var(--accent-light);
}

.cert-link {
  color: var(--text-dim);
  transition: color var(--transition);
  flex-shrink: 0;
}

.cert-link:hover {
  color: var(--accent);
}

/* ===== CONTACT ===== */
#contact {
  background: var(--bg);
}

.contact-wrapper {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.contact-wrapper .section-header {
  margin-bottom: 40px;
}

.contact-intro {
  color: var(--text-muted);
  margin-bottom: 48px;
  line-height: 1.8;
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: var(--transition);
}

.contact-link svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
}

.contact-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-3px);
}

.contact-email {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 1rem;
  color: var(--accent);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
  padding-bottom: 2px;
}

.contact-email:hover {
  border-color: var(--accent);
}

/* ===== FOOTER ===== */
footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  text-align: center;
}

.footer-text {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-dim);
}

.footer-text span {
  color: var(--accent);
}

/* ===== ANIMATIONS ===== */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-up:nth-child(2) { transition-delay: 0.1s; }
.fade-up:nth-child(3) { transition-delay: 0.2s; }
.fade-up:nth-child(4) { transition-delay: 0.3s; }

/* ===== MOBILE NAV ===== */
@media (max-width: 768px) {
  .hamburger { display: flex; }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    bottom: 0;
    width: 70%;
    max-width: 280px;
    background: rgba(17, 17, 24, 0.98);
    backdrop-filter: blur(20px);
    border-left: 1px solid var(--border);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 32px;
    transition: right var(--transition);
    z-index: 99;
  }

  .nav-links.open { right: 0; }

  .nav-links a { font-size: 1.1rem; }

  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .about-highlights { grid-template-columns: 1fr 1fr; }
  .about-visual { order: -1; }

  .hero-actions { flex-direction: column; width: fit-content; }

  section { padding: 70px 0; }
}

@media (max-width: 480px) {
  .projects-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  .contact-links { flex-direction: column; align-items: center; }
  .about-highlights { grid-template-columns: 1fr 1fr; }
}