/* ==============================
   VARIABLES & RESET
   ============================== */
:root {
  --primary: #1a56db;
  --primary-dark: #1444b0;
  --primary-light: #3b82f6;
  --primary-bg: #eff6ff;
  --accent: #2563eb;
  --dark: #0f172a;
  --dark-2: #1e293b;
  --dark-3: #334155;
  --gray: #64748b;
  --gray-light: #94a3b8;
  --gray-lighter: #cbd5e1;
  --light: #f8fafc;
  --white: #ffffff;
  --border: #e2e8f0;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.04);
  --shadow-lg: 0 4px 6px rgba(0,0,0,0.05), 0 10px 30px rgba(0,0,0,0.08);
  --shadow-xl: 0 10px 40px rgba(0,0,0,0.12);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-xs: 6px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  font-family: var(--font);
  color: var(--dark);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

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

ul { list-style: none; }

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

.accent { color: var(--primary); }

/* ==============================
   NAVBAR
   ============================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}

.navbar.scrolled {
  border-bottom-color: var(--border);
  box-shadow: 0 1px 8px rgba(0,0,0,0.06);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--dark);
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--gray);
  transition: var(--transition);
  position: relative;
}

.nav-links a:hover { color: var(--dark); }

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: var(--transition);
}

.nav-links a:hover::after { width: 100%; }

.nav-cta {
  background: var(--primary) !important;
  color: var(--white) !important;
  padding: 8px 20px;
  border-radius: 8px;
  font-weight: 600 !important;
}

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

.nav-cta:hover { background: var(--primary-dark) !important; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--dark);
  border-radius: 2px;
  transition: var(--transition);
}

/* ==============================
   HERO
   ============================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 100px 0 60px;
  background: linear-gradient(180deg, var(--primary-bg) 0%, var(--white) 100%);
  overflow: hidden;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(37,99,235,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37,99,235,0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-greeting {
  font-size: 1rem;
  font-weight: 500;
  color: var(--primary);
  margin-bottom: 8px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.hero-name {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--dark);
  margin-bottom: 16px;
}

.hero-title-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.hero-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-bg);
  padding: 4px 14px;
  border-radius: 6px;
  border: 1px solid rgba(37,99,235,0.15);
}

.hero-divider { color: var(--gray-lighter); }

.hero-subtitle {
  font-size: 1rem;
  color: var(--gray);
  font-weight: 500;
}

.hero-description {
  font-size: 1.05rem;
  color: var(--gray);
  margin-bottom: 28px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-bottom: 40px;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(26,86,219,0.3);
}

.btn-outline {
  background: transparent;
  color: var(--dark);
  border-color: var(--border);
}

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

.hero-stats {
  display: flex;
  gap: 32px;
}

.stat { text-align: center; }

.stat-number {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--dark);
  display: inline;
}

.stat-plus {
  color: var(--primary);
  font-weight: 700;
}

.stat-label {
  display: block;
  margin-top: 8px;
  color: var(--gray);
  font-size: 0.95rem;
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.hero-card {
  width: 100%;
  max-width: 520px;
  border-radius: 28px;
  background: #ffffff;
  box-shadow: var(--shadow-xl);
  border: 1px solid rgba(226,232,240,0.9);
  overflow: hidden;
}

.hero-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 22px 14px;
  background: #f8fafc;
}

.card-dots span {
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 8px;
  border-radius: 100%;
  background: #cbd5e1;
}

.card-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--dark-2);
}

.hero-code {
  padding: 24px;
  background: #0f172a;
  color: #e2e8f0;
  font-family: var(--font-mono);
  border-radius: 0 0 28px 28px;
  line-height: 1.6;
}

.code-keyword { color: #38bdf8; }
.code-class { color: #f8b4d9; }
.code-func { color: #a5b4fc; }
.code-string { color: #34d399; }
.code-comment { color: #9ca3af; }

.section {
  padding: 100px 0;
}

.section-title {
  font-size: clamp(2rem, 3vw, 2.6rem);
  font-weight: 800;
  margin-bottom: 18px;
}

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

.about-grid {
  display: grid;
  grid-template-columns: 2.4fr 1.6fr;
  gap: 40px;
}

.about-lead {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--dark-2);
  margin-bottom: 18px;
}

.about-text p {
  color: var(--gray);
  margin-bottom: 18px;
}

.about-highlights {
  display: grid;
  gap: 18px;
  margin-top: 24px;
}

.highlight-item {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  background: #ffffff;
  border: 1px solid rgba(226,232,240,0.9);
  border-radius: 20px;
  padding: 18px;
  box-shadow: var(--shadow);
}

.highlight-icon {
  width: 52px;
  min-width: 52px;
  height: 52px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: var(--primary-bg);
  color: var(--primary);
}

.highlight-item h4 {
  margin-bottom: 8px;
  font-size: 1rem;
}

.highlight-item p {
  color: var(--gray);
  font-size: 0.95rem;
}

.info-card {
  background: #ffffff;
  border: 1px solid rgba(226,232,240,0.9);
  border-radius: 24px;
  padding: 28px;
  box-shadow: var(--shadow);
}

.info-card h3 {
  margin-bottom: 18px;
}

.info-list {
  display: grid;
  gap: 12px;
}

.info-label {
  display: block;
  color: var(--gray);
  font-size: 0.9rem;
}

.info-value {
  display: block;
  font-weight: 600;
  color: var(--dark-2);
}

.timeline {
  display: grid;
  gap: 24px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 6px 1fr;
  gap: 20px;
}

.timeline-dot {
  width: 6px;
  background: var(--gray-light);
  border-radius: 999px;
  margin-top: 10px;
}

.timeline-dot.active { background: var(--primary); }

.timeline-content {
  background: #ffffff;
  border: 1px solid rgba(226,232,240,0.9);
  border-radius: 24px;
  padding: 28px;
  box-shadow: var(--shadow);
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: flex-start;
  margin-bottom: 18px;
}

.timeline-company {
  color: var(--primary);
  font-weight: 700;
}

.timeline-date {
  color: var(--gray);
  font-size: 0.95rem;
}

.timeline-tag {
  display: inline-flex;
  margin-bottom: 16px;
  color: var(--dark-2);
  font-weight: 600;
}

.timeline-list {
  display: grid;
  gap: 10px;
  color: var(--gray);
}

.timeline-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.timeline-tech span {
  display: inline-flex;
  background: var(--primary-bg);
  color: var(--primary-dark);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 0.9rem;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.skill-card {
  background: #ffffff;
  border: 1px solid rgba(226,232,240,0.9);
  border-radius: 24px;
  padding: 24px;
  box-shadow: var(--shadow);
}

.skill-card-header {
  margin-bottom: 18px;
}

.skill-card h3 {
  margin: 0;
  font-size: 1.15rem;
}

.skill-list {
  color: var(--gray);
  line-height: 1.8;
  margin-bottom: 20px;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.skill-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(59, 130, 246, 0.1);
  color: #1d4ed8;
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 0.85rem;
  font-weight: 600;
}

.project-grid {
  display: grid;
  gap: 20px;
}

.project-card {
  background: #ffffff;
  border: 1px solid rgba(226,232,240,0.9);
  border-radius: 24px;
  padding: 24px;
  box-shadow: var(--shadow);
}

.project-card h3 {
  margin-bottom: 12px;
}

.project-card p {
  color: var(--gray);
  line-height: 1.8;
  margin-bottom: 18px;
}

.project-link {
  color: var(--primary);
  font-weight: 600;
}

.contact-grid {
  display: grid;
  gap: 20px;
  margin-top: 24px;
}

.contact-card {
  background: #ffffff;
  border: 1px solid rgba(226,232,240,0.9);
  border-radius: 24px;
  padding: 24px;
  box-shadow: var(--shadow);
}

.contact-card h3 {
  margin-bottom: 10px;
}

.contact-card p a {
  color: var(--primary);
  word-break: break-word;
}

.scroll-indicator {
  position: absolute;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%);
  display: grid;
  gap: 10px;
  align-items: center;
}

.scroll-arrow {
  width: 18px;
  height: 18px;
  border-right: 2px solid var(--primary);
  border-bottom: 2px solid var(--primary);
  transform: rotate(45deg);
  animation: scroll 1.2s ease-in-out infinite;
}

@keyframes scroll {
  0%, 100% { transform: translateY(0) rotate(45deg); }
  50% { transform: translateY(8px) rotate(45deg); }
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.hidden {
  display: none !important;
}

@media (max-width: 960px) {
  .hero-content { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .timeline-item { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav-links { display: none; position: absolute; top: 72px; right: 24px; background: #ffffff; border: 1px solid rgba(226,232,240,0.9); border-radius: 16px; padding: 18px; flex-direction: column; width: calc(100% - 48px); box-shadow: var(--shadow-lg); }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  .hero { padding-top: 120px; }
  .hero-name { font-size: 2.8rem; }
  .hero-stats { flex-direction: column; gap: 18px; }
}