:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-accent: #172554;
  --text-primary: #ffffff;
  --text-secondary: #d1d5db;
  --text-muted: #9ca3af;
  --accent-blue: #3b82f6;
  --accent-cyan: #06b6d4;
  --accent-blue-light: #60a5fa;
  --accent-cyan-light: #22d3ee;
  --accent-purple: #a855f7;
  --border-color: rgba(255, 255, 255, 0.1);
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --container-max: 1280px;
  --font-mono: 'Fira Code', monospace;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; overscroll-behavior: none; }
body {
  font-family: var(--font-mono);
  background: linear-gradient(135deg, var(--bg-primary), var(--bg-accent), var(--bg-primary));
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overscroll-behavior: none;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(to bottom, var(--accent-blue), var(--accent-cyan));
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(to bottom, #2563eb, #0891b2);
}

/* ── Layout ── */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ── Utilities ── */
.gradient-text {
  background: linear-gradient(to right, var(--accent-blue-light), var(--accent-cyan-light), var(--accent-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: 1rem;
  padding: 1.5rem;
  transition: transform 0.3s, box-shadow 0.3s;
}
.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 40px rgba(59, 130, 246, 0.1);
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
}
.section-title h2 {
  font-size: 2.5rem;
  font-weight: 700;
  display: inline-block;
}
.section-title .underline {
  height: 4px;
  width: 80px;
  margin: 0.75rem auto 0;
  background: linear-gradient(to right, var(--accent-blue), var(--accent-cyan));
  border-radius: 2px;
}

/* ── Buttons ── */
.btn {
  display: inline-block;
  padding: 0.75rem 2rem;
  border-radius: 9999px;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.3s;
  border: none;
  text-align: center;
}
.btn-primary {
  background: linear-gradient(to right, var(--accent-blue), var(--accent-cyan));
  color: white;
}
.btn-primary:hover {
  transform: scale(1.05);
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.4);
}
.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-secondary);
}
.btn-secondary:hover {
  background: #334155;
  transform: scale(1.05);
}
.btn-outline {
  background: transparent;
  border: 2px solid var(--accent-blue);
  color: var(--accent-blue-light);
}
.btn-outline:hover {
  background: var(--accent-blue);
  color: white;
  transform: scale(1.05);
}

/* ── Icon colors ── */
.icon-blue { color: var(--accent-blue-light); }
.icon-yellow { color: #facc15; }
.icon-green { color: #4ade80; }
.icon-red { color: #f87171; }
.icon-purple { color: var(--accent-purple); }

/* ══════════════════════════════════════
   HEADER
   ══════════════════════════════════════ */
.site-header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 50;
  transition: all 0.3s;
  background: transparent;
}
.site-header.scrolled {
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}
.site-header nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}
.site-header .logo {
  font-size: 1.25rem;
  font-weight: 700;
}
.desktop-nav {
  display: none;
  gap: 2rem;
}
.desktop-nav a {
  color: var(--text-muted);
  transition: color 0.3s;
  font-size: 0.9rem;
}
.desktop-nav a:hover { color: var(--accent-blue-light); }
.mobile-menu-btn {
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 0.5rem;
}
.mobile-nav {
  display: none;
  flex-direction: column;
  gap: 1rem;
  padding: 1rem 0;
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  color: var(--text-secondary);
  transition: color 0.3s;
  font-size: 0.95rem;
}
.mobile-nav a:hover { color: var(--accent-blue-light); }

@media (min-width: 768px) {
  .desktop-nav { display: flex; }
  .mobile-menu-btn { display: none; }
}

/* ══════════════════════════════════════
   HERO
   ══════════════════════════════════════ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  text-align: center;
}
.animated-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}
.blob {
  position: absolute;
  width: 20rem;
  height: 20rem;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.2;
  animation: pulse-blob 4s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}
.blob-1 { top: -10rem; right: -10rem; background: var(--accent-blue); }
.blob-2 { bottom: -10rem; left: -10rem; background: var(--accent-cyan); animation-delay: 2s; }
.blob-3 {
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  background: var(--accent-purple);
  animation-delay: 4s;
}
@keyframes pulse-blob {
  0%, 100% { opacity: 0.2; }
  50% { opacity: 0.35; }
}

.hero-content { position: relative; z-index: 10; }
.hero-name {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}
.hero-typing {
  font-size: 1.75rem;
  margin-bottom: 2rem;
  min-height: 4rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.typing-prefix { color: var(--text-secondary); }
.typing-text {
  color: var(--accent-blue-light);
  font-weight: 600;
  margin-left: 0.5rem;
}
.typing-cursor {
  animation: blink 1s step-end infinite;
  color: var(--accent-blue-light);
  font-weight: 300;
}
@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}
.hero-description {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 48rem;
  margin: 0 auto 3rem;
  line-height: 1.7;
}
.hero-socials {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 3rem;
}
.social-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  background: rgba(30, 41, 59, 0.5);
  transition: all 0.3s;
}
.social-btn:hover {
  background: rgba(51, 65, 85, 0.5);
  transform: scale(1.1);
}
.social-btn svg { width: 24px; height: 24px; }
.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 4rem;
}
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  animation: bounce 2s infinite;
  color: var(--text-muted);
  transition: color 0.3s;
}
.scroll-indicator:hover { color: var(--accent-blue-light); }
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(-10px); }
}

@media (min-width: 768px) {
  .hero-name { font-size: 5rem; }
  .hero-typing { font-size: 2.5rem; }
  .hero-description { font-size: 1.5rem; }
}

/* ══════════════════════════════════════
   SECTIONS
   ══════════════════════════════════════ */
section { padding: 5rem 0; }
.section-alt { background: rgba(15, 23, 42, 0.5); }

/* ══════════════════════════════════════
   ABOUT
   ══════════════════════════════════════ */
.about-grid {
  display: grid;
  gap: 3rem;
  max-width: 72rem;
  margin: 0 auto;
}
.about-text p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.8;
}
.about-skills {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}
.skill-highlight {
  text-align: center;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.skill-highlight svg {
  margin: 0 auto 0.75rem;
  display: block;
}
.skill-highlight h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}
.skill-highlight p {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.fun-facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 4rem;
  max-width: 72rem;
  margin-left: auto;
  margin-right: auto;
}
.fun-fact {
  text-align: center;
  padding: 2rem;
}
.fun-fact svg {
  margin: 0 auto 0.75rem;
  display: block;
}
.fun-fact-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}
.fun-fact .value {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}
.fun-fact .label {
  color: var(--text-muted);
  font-size: 0.85rem;
}

@media (min-width: 1024px) {
  .about-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 767px) {
  .fun-facts { grid-template-columns: 1fr; }
}

/* ══════════════════════════════════════
   SKILLS
   ══════════════════════════════════════ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  max-width: 72rem;
  margin: 0 auto;
}
.skill-category h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  text-align: center;
}
.skill-icons {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}
.skill-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem;
  border-radius: 0.75rem;
  background: rgba(255, 255, 255, 0.03);
  transition: all 0.3s;
}
.skill-item:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-2px);
}
.skill-item img {
  width: 40px;
  height: 40px;
  border-radius: 8px;
}
.skill-item span {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
}

@media (max-width: 767px) {
  .skills-grid { grid-template-columns: 1fr; }
}

/* ══════════════════════════════════════
   PROJECTS
   ══════════════════════════════════════ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  max-width: 84rem;
  margin: 0 auto;
}
.project-card {
  border-radius: 1rem;
  overflow: hidden;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  transition: all 0.3s;
  display: flex;
  flex-direction: column;
}
.project-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(59, 130, 246, 0.15);
}
.project-image {
  height: 12rem;
  background-size: cover;
  background-position: center;
  position: relative;
}
.project-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 50%, rgba(15, 23, 42, 0.9));
}
.project-body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.project-body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}
.project-body > p {
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.6;
  margin-bottom: 1rem;
  flex: 1;
}
.project-techs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}
.project-techs img {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  transition: transform 0.2s;
}
.project-techs img:hover { transform: scale(1.2); }
.project-links {
  display: flex;
  gap: 1rem;
}
.project-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--accent-blue-light);
  transition: color 0.3s;
}
.project-links a:hover { color: var(--accent-cyan-light); }
.project-links a svg { flex-shrink: 0; }
.view-more {
  text-align: center;
  margin-top: 3rem;
}

@media (max-width: 1023px) {
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 767px) {
  .projects-grid { grid-template-columns: 1fr; }
}

/* ══════════════════════════════════════
   EXPERIENCE (Timeline)
   ══════════════════════════════════════ */
.timeline {
  max-width: 56rem;
  margin: 0 auto;
  position: relative;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 1rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent-blue), var(--accent-cyan));
}
.timeline-item {
  position: relative;
  padding-left: 3.5rem;
  margin-bottom: 3rem;
}
.timeline-dot {
  position: absolute;
  left: 0.5rem;
  top: 1.5rem;
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background: linear-gradient(to right, var(--accent-blue), var(--accent-cyan));
  z-index: 10;
}
.timeline-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}
.timeline-card .company {
  color: var(--accent-blue-light);
  font-weight: 500;
  margin-bottom: 0.25rem;
}
.timeline-card .duration {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 0.75rem;
}
.timeline-card p.description {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 1rem;
}
.timeline-techs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.timeline-techs img {
  width: 28px;
  height: 28px;
  border-radius: 6px;
}

@media (min-width: 768px) {
  .timeline::before {
    left: 50%;
    transform: translateX(-50%);
  }
  .timeline-item {
    padding-left: 0;
    width: 50%;
  }
  .timeline-item:nth-child(odd) {
    padding-right: 3rem;
    text-align: right;
  }
  .timeline-item:nth-child(odd) .timeline-dot {
    right: -0.5rem;
    left: auto;
  }
  .timeline-item:nth-child(odd) .timeline-techs {
    justify-content: flex-end;
  }
  .timeline-item:nth-child(even) {
    margin-left: 50%;
    padding-left: 3rem;
  }
  .timeline-item:nth-child(even) .timeline-dot {
    left: -0.5rem;
  }
}

/* ══════════════════════════════════════
   CONTACT
   ══════════════════════════════════════ */
.contact-inner {
  max-width: 56rem;
  margin: 0 auto;
}
.contact-header {
  text-align: center;
  margin-bottom: 3rem;
}
.contact-header h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
}
.contact-header p {
  color: var(--text-secondary);
  max-width: 40rem;
  margin: 0 auto;
  line-height: 1.7;
}
.contact-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 3rem;
}
.contact-card {
  text-align: center;
  padding: 2rem;
}
.contact-card img,
.contact-card svg {
  width: 40px;
  height: 40px;
  margin: 0 auto 1rem;
  border-radius: 8px;
  display: block;
}
.contact-card h4 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.contact-card a,
.contact-card span {
  color: var(--text-muted);
  font-size: 0.85rem;
  transition: color 0.3s;
  word-break: break-all;
}
.contact-card a:hover { color: var(--accent-blue-light); }
.contact-socials { text-align: center; }
.contact-socials h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
}
.social-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
}

@media (max-width: 767px) {
  .contact-cards { grid-template-columns: 1fr; }
}

/* ══════════════════════════════════════
   FOOTER
   ══════════════════════════════════════ */
.site-footer {
  margin-top: 5rem;
  padding: 2rem 0;
  border-top: 1px solid rgba(51, 65, 85, 0.5);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ══════════════════════════════════════
   ANIMATIONS
   ══════════════════════════════════════ */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}