:root {
  --bg-dark: #090a0f;
  --bg-card: rgba(18, 22, 33, 0.75);
  --bg-card-hover: rgba(26, 32, 48, 0.9);
  --bg-surface: #0f131c;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-accent: rgba(59, 130, 246, 0.35);
  --text-main: #f3f4f6;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --accent-blue: #3b82f6;
  --accent-blue-light: #60a5fa;
  --accent-gold: #f59e0b;
  --accent-gold-light: #fbbf24;
  --accent-cyan: #38bdf8;
  --accent-purple: #a855f7;
  --accent-emerald: #10b981;
  --font-sans: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", monospace;
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --radius-xs: 6px;
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Background Ambient Lighting */
.ambient-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
}

.glow-top {
  top: -150px;
  left: 50%;
  transform: translateX(-50%);
  width: 650px;
  height: 450px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.16), rgba(245, 158, 11, 0.05), transparent 70%);
}

.glow-right {
  top: 35%;
  right: -100px;
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.12), transparent 70%);
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 50% 20%, black 40%, transparent 80%);
  pointer-events: none;
  z-index: 0;
}

.site-container {
  position: relative;
  z-index: 1;
  width: 100%;
}

/* Topbar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(9, 10, 15, 0.85);
  border-bottom: 1px solid var(--border-color);
}

.topbar-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--text-main);
}

.brand-icon {
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-title {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.accent-dot {
  color: var(--accent-blue-light);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  font-size: 0.72rem;
  font-weight: 600;
  color: #10b981;
  font-family: var(--font-mono);
  margin-left: 0.4rem;
}

.badge-pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 10px #10b981;
  animation: pulse-badge 2s infinite;
}

@keyframes pulse-badge {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

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

.nav-links a.nav-highlight {
  color: var(--accent-blue-light);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Language Switch */
.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-family: var(--font-mono);
}

.lang-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  padding: 0.15rem 0.35rem;
  font-weight: 700;
  font-size: 0.82rem;
  transition: color 0.15s ease;
}

.lang-btn:hover {
  color: var(--text-main);
}

.lang-btn.is-active {
  color: var(--accent-blue-light);
  background: rgba(59, 130, 246, 0.15);
  border-radius: 4px;
}

.lang-sep {
  color: var(--text-dim);
  font-size: 0.75rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-sm);
  padding: 0.65rem 1.15rem;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}

.btn-sm {
  padding: 0.45rem 0.9rem;
  font-size: 0.82rem;
}

.btn-lg {
  padding: 0.85rem 1.5rem;
  font-size: 1rem;
  border-radius: var(--radius-md);
}

.btn-primary {
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  color: #fff;
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #60a5fa, #2563eb);
  box-shadow: 0 6px 25px rgba(59, 130, 246, 0.45);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(255, 255, 255, 0.18);
  transform: translateY(-1px);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  flex-direction: column;
  gap: 5px;
}

.mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: 0.3s;
}

/* Hero Section */
.hero-section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 5rem 1.5rem 3rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.25);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-blue-light);
  margin-bottom: 1.75rem;
}

.hero-title {
  font-size: clamp(2.2rem, 5.5vw, 4.2rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.04em;
  max-width: 920px;
  margin-bottom: 1.5rem;
}

.gradient-text {
  background: linear-gradient(135deg, #ffffff 30%, #93c5fd 70%, #3b82f6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.22rem);
  color: var(--text-muted);
  max-width: 800px;
  margin-bottom: 2.5rem;
  line-height: 1.65;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 3.5rem;
}

.hero-metrics {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 1.25rem 2rem;
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  max-width: 960px;
  width: 100%;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.metric-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
}

.metric-val {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent-blue-light);
  font-family: var(--font-mono);
}

.metric-desc {
  font-size: 0.78rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.metric-divider {
  width: 1px;
  height: 36px;
  background: var(--border-color);
}

/* Sections General */
.section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 5.5rem 1.5rem;
}

.section-header {
  margin-bottom: 3rem;
}

.section-tag {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-blue-light);
  margin-bottom: 0.6rem;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 0.85rem;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 720px;
  line-height: 1.6;
}

/* Profile Grid */
.profile-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.profile-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
}

.profile-icon {
  font-size: 1.8rem;
  margin-bottom: 1rem;
}

.profile-card h4 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.profile-highlight {
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent-blue-light);
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.profile-sub {
  font-size: 0.88rem;
  color: var(--text-dim);
  line-height: 1.45;
}

/* Projects Grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 1.75rem;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
  transition: all 0.25s ease;
}

.project-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.18);
  transform: translateY(-3px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
}

.project-card-featured {
  border-color: var(--border-accent);
  box-shadow: 0 0 30px rgba(59, 130, 246, 0.06);
}

.project-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.project-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.project-badge {
  font-size: 0.72rem;
  font-weight: 700;
  font-family: var(--font-mono);
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--border-color);
  background: rgba(255, 255, 255, 0.03);
}

.badge-ai {
  color: var(--accent-gold-light);
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.25);
}

.badge-saas {
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.1);
  border-color: rgba(56, 189, 248, 0.25);
}

.badge-arch {
  color: var(--accent-purple);
  background: rgba(168, 85, 247, 0.1);
  border-color: rgba(168, 85, 247, 0.25);
}

.badge-mobile {
  color: #10b981;
  background: rgba(16, 185, 129, 0.1);
  border-color: rgba(16, 185, 129, 0.25);
}

.badge-traffic {
  color: #f43f5e;
  background: rgba(244, 63, 94, 0.1);
  border-color: rgba(244, 63, 94, 0.25);
}

.badge-tech {
  color: var(--text-muted);
}

.project-link-icon {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.04);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-color);
  transition: all 0.15s ease;
}

.project-link-icon:hover {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.25);
}

.project-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.85rem;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.project-summary {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.project-points {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.point-item {
  font-size: 0.86rem;
  color: #cbd5e1;
  padding: 0.5rem 0.85rem;
  background: rgba(0, 0, 0, 0.3);
  border-radius: var(--radius-xs);
  border: 1px solid rgba(255, 255, 255, 0.04);
  line-height: 1.45;
}

.project-card-footer {
  margin-top: auto;
  padding-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.tech-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.tech-pills span {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.03);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.04);
}

/* Expertise Grid */
.expertise-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.expertise-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  backdrop-filter: blur(12px);
  transition: all 0.2s ease;
}

.expertise-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
}

.expertise-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.expertise-card h3 {
  font-size: 1.18rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.expertise-card p {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Architecture Case Studies */
.arch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.arch-card {
  background: #0e121a;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
}

.arch-number {
  font-size: 2.2rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: rgba(59, 130, 246, 0.35);
  line-height: 1;
  margin-bottom: 1rem;
}

.arch-card h4 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.arch-card p {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.arch-badge {
  margin-top: auto;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--accent-blue-light);
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.25);
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-xs);
  align-self: flex-start;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.2s ease;
}

.arch-badge-link {
  cursor: pointer;
}

.arch-badge-link:hover {
  background: rgba(59, 130, 246, 0.25);
  border-color: rgba(96, 165, 250, 0.6);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.25);
}

.arch-badge-link .badge-arrow {
  transition: transform 0.2s ease;
}

.arch-badge-link:hover .badge-arrow {
  transform: translateX(3px);
}

/* Timeline */
.timeline-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 1.5rem;
}

.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
}

.timeline-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--accent-blue), transparent);
}

.timeline-meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.6rem;
}

.timeline-company {
  font-size: 1.15rem;
  font-weight: 800;
  color: #fff;
}

.timeline-date {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
  text-transform: uppercase;
}

.timeline-role {
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent-blue-light);
  margin-bottom: 0.85rem;
  line-height: 1.3;
}

.timeline-desc {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Contact Hub Section */
.contact-card {
  background: linear-gradient(135deg, rgba(26, 32, 48, 0.75), rgba(15, 18, 26, 0.95));
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  padding: 3.5rem 3rem;
  box-shadow: 0 25px 80px rgba(0, 0, 0, 0.5), 0 0 50px rgba(59, 130, 246, 0.08);
}

.contact-title {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.contact-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 780px;
  margin-bottom: 2.5rem;
}

.contact-links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}

.contact-channel-btn {
  background: rgba(10, 12, 18, 0.8);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
  color: #fff;
  cursor: pointer;
  transition: all 0.2s ease;
}

.contact-channel-btn:hover {
  background: rgba(20, 25, 38, 0.9);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

.channel-info {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
}

.channel-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.channel-value {
  font-size: 0.98rem;
  color: #fff;
}

.copy-badge,
.arrow-badge {
  margin-left: auto;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--accent-blue-light);
  background: rgba(59, 130, 246, 0.1);
  padding: 0.25rem 0.55rem;
  border-radius: 4px;
  border: 1px solid rgba(59, 130, 246, 0.25);
}

.email-btn {
  border-color: var(--border-accent);
  background: rgba(59, 130, 246, 0.08);
}

/* Footer */
.footer {
  border-top: 1px solid var(--border-color);
  padding: 3rem 1.5rem;
  margin-top: 4rem;
  background: rgba(9, 10, 15, 0.9);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.footer-brand p {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-top: 0.2rem;
}

.footer-copy {
  text-align: right;
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* Responsive Media Queries */
@media (max-width: 960px) {
  .contact-card {
    padding: 2.5rem 2rem;
  }

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

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 65px;
    left: 0;
    right: 0;
    background: rgba(9, 10, 15, 0.98);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 1.25rem;
    display: none;
  }

  .nav-links.is-open {
    display: flex;
  }

  .mobile-toggle {
    display: flex;
  }

  .status-pill {
    display: none;
  }

  .hero-metrics {
    flex-direction: column;
    gap: 1rem;
  }

  .metric-divider {
    width: 60%;
    height: 1px;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-copy {
    text-align: left;
  }
}