:root {
  --surface-inverse: #0A0A0A;
  --foreground-inverse: #FFFFFF;
  --foreground-muted: #A1A1A1;
  --border-subtle: #222233;
  --accent-primary: #582CFF;
  --accent-secondary: #BF40FF;
  --accent-tertiary: #00F2FF;
  --rounded-sm: 4px;
  --rounded-lg: 8px;
  --font-heading: 'Inter', sans-serif;
  --font-body: 'Geist', 'Inter', sans-serif;
  --font-caption: 'Funnel Sans', sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-snap-type: y mandatory;
}

body {
  font-family: var(--font-body);
  background: var(--surface-inverse);
  color: var(--foreground-inverse);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Emoji Container */
.emoji-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}

.floating-emoji {
  position: absolute;
  font-size: 32px;
  opacity: 0.4;
  will-change: transform;
  user-select: none;
}

/* Neon Streaks */
.neon-streaks {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.streak {
  position: absolute;
  height: 3px;
  border-radius: 2px;
  filter: blur(8px);
  animation: streakGlow 4s ease-in-out infinite alternate;
}

.streak-1 {
  width: 80%;
  top: 22%;
  left: -10%;
  background: linear-gradient(90deg, transparent, var(--accent-primary), var(--accent-secondary), transparent);
  transform: rotate(8deg);
  animation-delay: 0s;
  animation-duration: 5s;
}

.streak-2 {
  width: 60%;
  top: 50%;
  left: 15%;
  background: linear-gradient(90deg, transparent, var(--accent-tertiary), var(--accent-primary), transparent);
  transform: rotate(-6deg);
  animation-delay: 1.5s;
  animation-duration: 6s;
}

.streak-3 {
  width: 70%;
  top: 78%;
  left: 5%;
  background: linear-gradient(90deg, transparent, var(--accent-secondary), var(--accent-tertiary), transparent);
  transform: rotate(12deg);
  animation-delay: 3s;
  animation-duration: 7s;
}

@keyframes streakGlow {
  0% { opacity: 0.15; transform: translateX(-20px) rotate(var(--rotation, 8deg)); }
  50% { opacity: 0.4; }
  100% { opacity: 0.2; transform: translateX(20px) rotate(var(--rotation, 8deg)); }
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  backdrop-filter: blur(20px);
  background: rgba(10, 10, 10, 0.8);
  border-bottom: 1px solid transparent;
  transform: translateY(-100%);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.nav.visible {
  transform: translateY(0);
  border-bottom-color: var(--border-subtle);
}

.nav-inner {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  color: var(--foreground-inverse);
}

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

.nav-links a {
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--foreground-muted);
  text-decoration: none;
  transition: color 0.2s;
}

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

.nav-cta {
  background: var(--accent-primary) !important;
  color: var(--foreground-inverse) !important;
  padding: 8px 16px;
  border-radius: var(--rounded-sm);
  font-weight: 600;
}

.nav-cta:hover {
  background: #6b3fff !important;
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  z-index: 2;
  padding: 0 24px;
  scroll-snap-align: start;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.hero-greeting {
  font-family: var(--font-caption);
  font-size: 16px;
  color: var(--accent-tertiary);
  letter-spacing: 2px;
  opacity: 0;
  transform: translateY(20px);
}

.hero-name {
  font-family: var(--font-heading);
  font-size: clamp(40px, 8vw, 72px);
  font-weight: 700;
  color: var(--foreground-inverse);
  letter-spacing: -2px;
  opacity: 0;
  transform: translateY(20px);
  min-height: 1.2em;
}

.hero-role {
  font-family: var(--font-body);
  font-size: clamp(16px, 2.5vw, 22px);
  color: var(--foreground-muted);
  opacity: 0;
  transform: translateY(20px);
}

.hero-cta {
  display: flex;
  gap: 16px;
  margin-top: 16px;
  opacity: 0;
  transform: translateY(20px);
}

.animate-in.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: var(--rounded-sm);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--accent-primary);
  color: var(--foreground-inverse);
}

.btn-primary:hover {
  background: #6b3fff;
  transform: scale(1.03);
  box-shadow: 0 0 20px rgba(88, 44, 255, 0.4);
}

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

.btn-secondary:hover {
  color: var(--foreground-inverse);
  border-color: var(--foreground-muted);
  transform: scale(1.03);
}

.btn-sm {
  padding: 10px 20px;
  font-size: 14px;
}

/* App Banner */
.app-banner {
  position: relative;
  z-index: 2;
  background: linear-gradient(180deg, rgba(88, 44, 255, 0.08) 0%, var(--surface-inverse) 100%);
  border-bottom: 1px solid var(--border-subtle);
  scroll-snap-align: start;
  scroll-margin-top: 60px;
}

.app-banner-inner {
  max-width: 1040px;
  margin: 0 auto;
  padding: 48px 24px;
  display: flex;
  align-items: center;
  gap: 40px;
}

.app-banner-left {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.app-banner-tag {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-caption);
  font-size: 11px;
  color: var(--accent-tertiary);
  letter-spacing: 2px;
}

.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-tertiary);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.app-banner-title {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 700;
  color: var(--foreground-inverse);
}

.app-banner-desc {
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--foreground-muted);
  line-height: 1.6;
}

.app-banner-icon-link {
  flex-shrink: 0;
  transition: transform 0.3s ease;
  animation: iconFloat 3s ease-in-out infinite;
}

.app-banner-icon-link:hover {
  transform: scale(1.05) rotateY(10deg);
}

.app-banner-icon {
  width: 120px;
  height: 120px;
  border-radius: 24px;
  box-shadow: 0 12px 40px rgba(88, 44, 255, 0.3);
}

@keyframes iconFloat {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-8px) rotate(2deg); }
}

/* Sections */
.section {
  position: relative;
  z-index: 2;
  padding: 100px 24px;
  scroll-snap-align: start;
  scroll-margin-top: 60px;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.section-alt {
  background: #0D0D14;
}

.section-inner {
  max-width: 1040px;
  margin: 0 auto;
  width: 100%;
}

.section-center {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.section-label {
  display: inline-block;
  font-family: var(--font-caption);
  font-size: 13px;
  color: var(--accent-primary);
  letter-spacing: 3px;
  margin-bottom: 48px;
}

/* Scroll Reveal */
.scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.scroll-reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* About */
.about-grid {
  display: flex;
  gap: 64px;
}

.about-text {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.about-text p {
  font-size: 17px;
  line-height: 1.7;
  color: var(--foreground-muted);
}

.about-text p:first-child {
  color: var(--foreground-inverse);
}

.about-stats {
  width: 280px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-value {
  display: flex;
  align-items: baseline;
}

.stat-num {
  font-family: var(--font-heading);
  font-size: 48px;
  font-weight: 700;
  color: var(--accent-tertiary);
}

.stat:nth-child(2) .stat-num { color: var(--accent-secondary); }
.stat:nth-child(3) .stat-num { color: var(--accent-primary); }

.stat-plus {
  font-family: var(--font-heading);
  font-size: 48px;
  font-weight: 700;
  color: var(--accent-tertiary);
}

.stat-label {
  font-family: var(--font-caption);
  font-size: 14px;
  color: var(--foreground-muted);
}

/* Skills */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.skill-card {
  padding: 32px;
  border-radius: var(--rounded-lg);
  border: 1px solid var(--border-subtle);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.7);
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.skill-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.8), 0 0 20px rgba(88, 44, 255, 0.1);
}

.skill-card h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 600;
}

.skill-card p {
  font-size: 14px;
  color: var(--foreground-muted);
  line-height: 1.6;
}

/* Experience */
.exp-list {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.exp-card {
  display: flex;
  gap: 48px;
  padding: 32px;
  border-radius: var(--rounded-lg);
  border: 1px solid var(--border-subtle);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.exp-card:hover {
  transform: translateX(4px);
  border-color: var(--accent-primary);
}

.exp-left {
  width: 200px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.exp-date {
  font-family: var(--font-caption);
  font-size: 13px;
  color: var(--accent-tertiary);
}

.exp-company {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 600;
}

.exp-right {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.exp-right h3 {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 600;
}

.exp-right p {
  font-size: 15px;
  color: var(--foreground-muted);
  line-height: 1.7;
}

/* Tags */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  padding: 4px 12px;
  border-radius: var(--rounded-sm);
  font-family: var(--font-caption);
  font-size: 12px;
}

.tag-primary { background: rgba(88, 44, 255, 0.15); color: var(--accent-primary); }
.tag-secondary { background: rgba(191, 64, 255, 0.15); color: var(--accent-secondary); }
.tag-tertiary { background: rgba(0, 242, 255, 0.15); color: var(--accent-tertiary); }

/* Projects */
.project-featured {
  margin-bottom: 32px;
}

.featured-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-caption);
  font-size: 11px;
  color: var(--accent-tertiary);
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.project-card {
  border-radius: var(--rounded-lg);
  border: 1px solid var(--border-subtle);
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover {
  transform: scale(1.01);
}

.project-card-featured {
  display: flex;
  box-shadow: 0 0 40px rgba(88, 44, 255, 0.2), 0 12px 24px rgba(0, 0, 0, 0.7);
  animation: featuredGlow 3s ease-in-out infinite alternate;
}

@keyframes featuredGlow {
  0% { box-shadow: 0 0 30px rgba(88, 44, 255, 0.15), 0 12px 24px rgba(0, 0, 0, 0.7); }
  100% { box-shadow: 0 0 50px rgba(88, 44, 255, 0.3), 0 12px 24px rgba(0, 0, 0, 0.7); }
}

.project-card-featured:hover {
  box-shadow: 0 0 60px rgba(88, 44, 255, 0.4), 0 16px 32px rgba(0, 0, 0, 0.8);
}

.project-card-secondary {
  display: flex;
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.7);
}

.project-preview {
  width: 480px;
  min-height: 300px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-preview-chifanlema {
  background: linear-gradient(135deg, #582CFF, #BF40FF 50%, #00F2FF);
}

.project-preview-text {
  font-size: 72px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.15);
  font-family: var(--font-heading);
}

.project-preview-thesis {
  width: 280px;
  min-height: 200px;
  background: linear-gradient(45deg, #0A0A0A, #222233 50%, #582CFF);
  color: var(--foreground-inverse);
}

.project-body {
  flex: 1;
  padding: 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 16px;
  background: #111118;
}

.project-body h3 {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 700;
}

.project-card-secondary .project-body h3 {
  font-size: 16px;
}

.project-body p {
  font-size: 15px;
  color: var(--foreground-muted);
  line-height: 1.7;
}

.project-card-secondary .project-body p {
  font-size: 13px;
}

.project-features {
  display: flex;
  gap: 24px;
  padding-top: 8px;
}

.project-features span {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-caption);
  font-size: 12px;
  color: var(--foreground-muted);
}

.project-links {
  display: flex;
  gap: 12px;
  padding-top: 8px;
}

/* Certifications */
.certs-row {
  display: flex;
  gap: 24px;
}

.cert-card {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 24px;
  border-radius: var(--rounded-lg);
  border: 1px solid var(--border-subtle);
  transition: border-color 0.3s ease;
}

.cert-card:hover {
  border-color: var(--accent-primary);
}

.cert-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.cert-info strong {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 600;
}

.cert-info span {
  font-family: var(--font-caption);
  font-size: 12px;
  color: var(--foreground-muted);
}

/* Contact */
.contact-heading {
  font-family: var(--font-heading);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  margin-bottom: 16px;
}

.contact-desc {
  font-size: 16px;
  color: var(--foreground-muted);
  max-width: 600px;
  line-height: 1.7;
  margin-bottom: 16px;
}

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

/* Footer */
.footer {
  position: relative;
  z-index: 2;
  padding: 40px 24px;
  text-align: center;
  scroll-snap-align: end;
}

.footer-divider {
  max-width: 1040px;
  margin: 0 auto 24px;
  height: 1px;
  background: var(--border-subtle);
}

.footer p {
  font-family: var(--font-caption);
  font-size: 13px;
  color: var(--foreground-muted);
}

/* Responsive */
@media (max-width: 900px) {
  .about-grid { flex-direction: column; }
  .about-stats { width: 100%; flex-direction: row; justify-content: space-around; }
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .exp-card { flex-direction: column; gap: 16px; }
  .exp-left { width: 100%; }
  .project-card-featured { flex-direction: column; }
  .project-card-secondary { flex-direction: column; }
  .project-preview { width: 100%; min-height: 180px; }
  .project-preview-thesis { width: 100%; }
  .project-body { padding: 24px; }
  .project-body h3 { font-size: 20px; }
  .project-body p { font-size: 14px; }
  .project-features { flex-direction: column; gap: 8px; }
  .project-links { flex-wrap: wrap; }
  .certs-row { flex-direction: column; }
  .app-banner-inner { flex-direction: column; text-align: center; align-items: center; }
}

@media (max-width: 600px) {
  .skills-grid { grid-template-columns: 1fr; }
  .nav-links a:not(.nav-cta) { display: none; }
  .hero-cta { flex-direction: column; align-items: center; }
  .contact-links { flex-direction: column; align-items: center; }
  .project-preview-text { font-size: 48px; }
  .featured-badge { margin-bottom: 12px; }
  .section { min-height: auto; padding: 80px 16px; }
  .app-banner { scroll-snap-align: none; }
}