/* ============================================
   skytechaisolutions.xyz — Portfolio Style
   ============================================ */

:root {
  --bg: #06060b;
  --bg-alt: #0c0c15;
  --surface: rgba(255, 255, 255, 0.03);
  --surface-hover: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --gradient-1: #6366f1;
  --gradient-2: #8b5cf6;
  --gradient-3: #06b6d4;
  --gradient: linear-gradient(135deg, var(--gradient-1), var(--gradient-2), var(--gradient-3));
  --gradient-text: linear-gradient(135deg, #818cf8, #a78bfa, #22d3ee);
  --radius: 16px;
  --radius-sm: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --font-mono: 'Fira Code', monospace;
}

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

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

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

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

ul {
  list-style: none;
}

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

/* ============================================
   PARTICLES CANVAS
   ============================================ */

#particles {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.4;
}

/* ============================================
   GLASS UTILITY
   ============================================ */

.glass {
  background: var(--surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
}

.glass:hover {
  border-color: var(--border-hover);
}

/* ============================================
   GRADIENT UTILITIES
   ============================================ */

.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-bg {
  background: var(--gradient);
}

/* ============================================
   NAVIGATION
   ============================================ */

.nav {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  border-radius: 100px;
  padding: 0;
  transition: var(--transition);
}

.nav.scrolled {
  top: 0;
  border-radius: 0 0 24px 24px;
  background: rgba(6, 6, 11, 0.85);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-color: rgba(255, 255, 255, 0.08);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 40px;
  padding: 12px 28px;
}

.nav-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: 2px;
}

.nav-links {
  display: flex;
  gap: 28px;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient);
  border-radius: 1px;
  transition: width var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
}

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

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 120px 24px 80px;
  overflow: hidden;
}

.hero-bg-gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% -20%, rgba(99, 102, 241, 0.15), transparent),
    radial-gradient(ellipse 60% 50% at 80% 80%, rgba(6, 182, 212, 0.1), transparent),
    radial-gradient(ellipse 50% 50% at 20% 60%, rgba(139, 92, 246, 0.08), transparent);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 720px;
}

.hero-greeting {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--gradient-1);
  margin-bottom: 16px;
}

.hero-name {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 7vw, 5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -1px;
}

.hero-titles {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.title-tag {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 6px 16px;
  border-radius: 100px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
}

.title-sep {
  font-size: 1.2rem;
  font-weight: 300;
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 40px;
  max-width: 580px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: 100px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition);
  cursor: pointer;
  font-family: var(--font-sans);
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
  border: none;
  box-shadow: 0 4px 24px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(99, 102, 241, 0.5);
}

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

.btn-secondary:hover {
  background: var(--surface-hover);
  border-color: var(--border-hover);
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 1;
}

.scroll-indicator span {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--text-dim);
}

.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--text-dim), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
  0%, 100% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
}

/* ============================================
   SECTIONS
   ============================================ */

.section {
  position: relative;
  z-index: 1;
  padding: 100px 24px;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 700;
  margin-bottom: 48px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-number {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 500;
}

.section-sub {
  color: var(--text-muted);
  margin-top: -32px;
  margin-bottom: 48px;
  font-size: 1rem;
}

/* ============================================
   ABOUT SECTION
   ============================================ */

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: start;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 16px;
  font-size: 0.975rem;
}

.skill-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.chip {
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.2);
  color: #a5b4fc;
}

.about-card {
  border-radius: var(--radius);
  padding: 32px;
}

.about-card-inner {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ============================================
   TIMELINE (Experience)
   ============================================ */

.timeline {
  display: flex;
  flex-direction: column;
  gap: 32px;
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 11px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--gradient-1), var(--gradient-3));
  border-radius: 1px;
}

.timeline-item {
  position: relative;
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  gap: 24px;
}

.timeline-dot {
  position: absolute;
  left: -39px;
  top: 40px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 3px solid var(--bg);
  box-shadow: 0 0 16px rgba(99, 102, 241, 0.4);
}

.timeline-content {
  flex: 1;
}

.timeline-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 8px;
}

.timeline-header h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text);
}

.timeline-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 4px 14px;
  border-radius: 100px;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.2);
  color: #a5b4fc;
}

.timeline-company {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.timeline-location {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 16px;
}

.timeline-details {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.timeline-details li {
  position: relative;
  padding-left: 20px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.timeline-details li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gradient-3);
}

/* ============================================
   EDUCATION
   ============================================ */

.edu-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 40px;
}

.edu-card {
  border-radius: var(--radius);
  padding: 32px;
}

.edu-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.edu-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.edu-school {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.edu-meta {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 14px;
}

.edu-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Languages */
.languages {
  border-radius: var(--radius);
  padding: 28px 32px;
}

.languages h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.lang-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.lang-item {
  display: grid;
  grid-template-columns: 80px 1fr 40px;
  align-items: center;
  gap: 16px;
}

.lang-name {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
}

.lang-bar {
  height: 6px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 3px;
  overflow: hidden;
}

.lang-fill {
  height: 100%;
  border-radius: 3px;
  background: var(--gradient);
}

.lang-level {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-align: right;
}

/* ============================================
   PROJECTS
   ============================================ */

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.project-card {
  display: flex;
  flex-direction: column;
  padding: 32px;
  border-radius: var(--radius);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient);
  opacity: 0;
  transition: opacity var(--transition);
  z-index: -1;
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
}

.project-card:hover::before {
  opacity: 0.04;
}

.project-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.project-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.project-url {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  margin-bottom: 12px;
}

.project-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  flex: 1;
  margin-bottom: 16px;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.tag {
  font-size: 0.7rem;
  padding: 3px 10px;
  border-radius: 100px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-dim);
}

.project-link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--gradient-1);
  transition: gap var(--transition);
}

.project-card:hover .project-link {
  letter-spacing: 1px;
}

/* ============================================
   CONTACT
   ============================================ */

.contact-content {
  max-width: 600px;
}

.contact-intro {
  color: var(--text-muted);
  margin-bottom: 32px;
  font-size: 1rem;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 24px;
  border-radius: var(--radius);
  transition: all var(--transition);
}

.contact-item:hover {
  background: var(--surface-hover);
  transform: translateX(6px);
}

.contact-icon {
  font-size: 1.2rem;
  width: 28px;
  text-align: center;
}

.contact-item span:last-child {
  font-size: 0.9rem;
  color: var(--text);
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
  position: relative;
  z-index: 1;
  padding: 40px 24px;
  text-align: center;
  border-top: 1px solid var(--border);
}

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

.footer-domain {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

/* ============================================
   REVEAL ANIMATIONS
   ============================================ */

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.timeline-item:nth-child(1) { transition-delay: 0s; }
.timeline-item:nth-child(2) { transition-delay: 0.15s; }

.edu-card:nth-child(1) { transition-delay: 0s; }
.edu-card:nth-child(2) { transition-delay: 0.1s; }

.project-card:nth-child(1) { transition-delay: 0s; }
.project-card:nth-child(2) { transition-delay: 0.1s; }
.project-card:nth-child(3) { transition-delay: 0.2s; }

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
  .nav-inner {
    gap: 20px;
    padding: 10px 20px;
  }

  .nav-links {
    gap: 16px;
  }

  .nav-links a {
    font-size: 0.8rem;
  }

  .hero {
    padding: 100px 20px 60px;
  }

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

  .edu-grid {
    grid-template-columns: 1fr;
  }

  .project-grid {
    grid-template-columns: 1fr;
  }

  .timeline {
    padding-left: 24px;
  }

  .timeline-dot {
    left: -31px;
  }

  .lang-item {
    grid-template-columns: 60px 1fr 36px;
    gap: 10px;
  }
}

@media (max-width: 480px) {
  .nav {
    top: 8px;
    left: 8px;
    right: 8px;
    transform: none;
    border-radius: 24px;
  }

  .nav-inner {
    justify-content: center;
  }

  .nav-links {
    display: none;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 280px;
  }

  .timeline-header {
    flex-direction: column;
  }
}