:root {
  --bg-base: #090a0f;
  --bg-surface: rgba(18, 20, 29, 0.72);
  --bg-surface-hover: rgba(26, 29, 42, 0.88);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-highlight: rgba(255, 255, 255, 0.18);
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  --accent-primary: #818cf8;
  --accent-secondary: #38bdf8;
  --accent-emerald: #34d399;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --radius-md: 12px;
  --radius-lg: 18px;
  --transition: 200ms cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* Subtle Ambient Background Glow */
.ambient-glow {
  position: fixed;
  width: 640px;
  height: 640px;
  border-radius: 50%;
  filter: blur(130px);
  pointer-events: none;
  z-index: -1;
  opacity: 0.16;
}

.ambient-glow--top {
  top: -260px;
  left: -140px;
  background: radial-gradient(circle, var(--accent-primary), transparent 70%);
}

.ambient-glow--bottom {
  bottom: -260px;
  right: -140px;
  background: radial-gradient(circle, var(--accent-secondary), transparent 70%);
}

.container {
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  background: rgba(9, 10, 15, 0.84);
  border-bottom: 1px solid var(--border-subtle);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 1rem;
  position: relative;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
  white-space: nowrap;
  flex-shrink: 0;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-monogram {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  padding: 0.35rem 0.55rem;
  border-radius: 8px;
  background: rgba(129, 140, 248, 0.12);
  border: 1px solid rgba(129, 140, 248, 0.3);
  color: var(--accent-primary);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: all var(--transition);
}

.mobile-menu-btn:hover {
  border-color: var(--border-highlight);
  background: rgba(255, 255, 255, 0.08);
}

.menu-bar {
  width: 18px;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.mobile-menu-btn.is-active .menu-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.mobile-menu-btn.is-active .menu-bar:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.is-active .menu-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.35rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.86rem;
  font-weight: 500;
  white-space: nowrap;
  transition: color var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

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

.nav-pill {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  padding: 0.1rem 0.4rem;
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.12);
  color: var(--accent-secondary);
  border: 1px solid rgba(56, 189, 248, 0.25);
}

/* Hero Section */
.hero {
  padding: 4.5rem 0 3.5rem;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 2.75rem;
}

.hero-content {
  min-width: 0;
}

.hero-portrait-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.hero-portrait-ring {
  padding: 4px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(129, 140, 248, 0.7), rgba(56, 189, 248, 0.6), rgba(255, 255, 255, 0.12));
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.55), 0 0 36px rgba(129, 140, 248, 0.18);
}

.hero-portrait {
  display: block;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--bg-base);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.38rem 0.85rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  max-width: 100%;
}

.status-dot {
  width: 8px;
  height: 8px;
  flex-shrink: 0;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  box-shadow: 0 0 10px var(--accent-emerald);
}

.hero-title {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  font-size: clamp(1.75rem, 3.4vw, 2.75rem);
  line-height: 1.2;
  letter-spacing: -0.028em;
  font-weight: 700;
  max-width: 840px;
}

.hero-headline {
  text-wrap: balance;
}

.hero-greeting {
  font-size: clamp(1.35rem, 2.5vw, 1.85rem);
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: -0.015em;
}

.text-gradient {
  background: linear-gradient(135deg, #ffffff 0%, #a5b4fc 55%, #38bdf8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 700;
}

.hero-subtitle {
  margin-top: 1.15rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.hero-actions {
  margin-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

/* Impact Metrics Strip */
.metrics-grid {
  margin-top: 2.5rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.9rem;
}

.metric-card {
  padding: 1.15rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.metric-value {
  font-family: var(--font-mono);
  font-size: 1.55rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.2;
  background: linear-gradient(135deg, #ffffff 0%, #a5b4fc 70%, #38bdf8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.metric-label {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-primary);
}

.metric-context {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.42;
  margin-top: 0.1rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.35rem;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition);
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--text-primary);
  color: var(--bg-base);
}

.btn-primary:hover {
  background: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(255, 255, 255, 0.12);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
  border-color: var(--border-subtle);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border-highlight);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-subtle);
}

.btn-outline:hover {
  border-color: var(--accent-primary);
  background: rgba(129, 140, 248, 0.08);
}

.btn-sm {
  padding: 0.5rem 0.95rem;
  font-size: 0.82rem;
  margin-top: auto;
  align-self: flex-start;
}

/* Sections */
.section {
  padding: 3.25rem 0;
  border-top: 1px solid var(--border-subtle);
}

.section-header {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  margin-bottom: 1.75rem;
}

.section-title-group {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-wrap: wrap;
}

.section-index {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-primary);
}

.section-title {
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.section-intro {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  max-width: 680px;
}

.section-intro code {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 0.15rem 0.4rem;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--accent-secondary);
}

/* Cards & Grids */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
}

.card:hover {
  border-color: var(--border-highlight);
  background: var(--bg-surface-hover);
}

.card-label {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.about-summary-card {
  margin-bottom: 1.25rem;
}

.tracks-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

.track-card {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-bottom: 2.25rem;
}

.principle-card {
  padding: 1.4rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.principle-index {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--accent-primary);
}

.principle-title {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text-primary);
}

.principle-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.58;
}

.skills-matrix-block {
  margin-top: 0.5rem;
}

.skills-matrix-heading {
  margin-bottom: 1rem;
}

.skills-matrix-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.15rem;
}

.skill-category-card {
  padding: 1.4rem 1.55rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.skill-category-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.prose p + p {
  margin-top: 1rem;
}

.prose p {
  color: var(--text-secondary);
  font-size: 0.96rem;
  line-height: 1.72;
}

.skill-group-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--accent-secondary);
  letter-spacing: -0.01em;
}

.skill-group-subtitle {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.42rem;
}

.skill-tag {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  padding: 0.3rem 0.6rem;
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

/* Timeline */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.timeline-item {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 1.5rem;
}

.timeline-meta {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.timeline-period {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent-primary);
}

.timeline-org {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
}

.timeline-loc {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.timeline-role {
  font-size: 1.08rem;
  font-weight: 600;
  margin-bottom: 0.45rem;
}

.timeline-desc {
  color: var(--text-secondary);
  font-size: 0.94rem;
  margin-bottom: 0.75rem;
}

.timeline-bullets {
  margin: 0 0 1rem 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  color: var(--text-secondary);
  font-size: 0.89rem;
  line-height: 1.58;
}

.timeline-bullets li::marker {
  color: var(--accent-primary);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.mini-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
  background: rgba(129, 140, 248, 0.08);
  color: #c7d2fe;
}

/* Projects & Store Cards */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 1.25rem;
}

.project-card,
.product-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.badge,
.product-category {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.22rem 0.6rem;
  border-radius: 999px;
  background: rgba(129, 140, 248, 0.12);
  color: var(--accent-primary);
  border: 1px solid rgba(129, 140, 248, 0.25);
}

.project-subtitle,
.product-price {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
}

.project-title,
.product-title {
  font-size: 1.12rem;
  font-weight: 600;
}

.project-desc,
.product-desc {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
}

.api-status-pill {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: rgba(52, 211, 153, 0.1);
  color: var(--accent-emerald);
  border: 1px solid rgba(52, 211, 153, 0.25);
}

/* Aerospace Research & Publications Section */
.section-header--split {
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.scholar-header-btn {
  margin-top: 0;
  align-self: center;
}

.aerospace-overview-card {
  margin-bottom: 1.25rem;
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-bottom: 2.25rem;
}

.pillar-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.pillar-card .tag-row {
  margin-top: auto;
  padding-top: 0.35rem;
}

.publications-block {
  margin-top: 0.5rem;
}

.publications-heading {
  margin-bottom: 1rem;
}

.publications-list {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.publication-card {
  padding: 1.35rem 1.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.publication-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.publication-meta {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
}

.publication-venue {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--accent-secondary);
}

.publication-link {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition);
}

.publication-link:hover {
  color: var(--text-primary);
}

.publication-title {
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 0.15rem;
}

.publication-authors {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.publication-summary {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.58;
  margin-top: 0.15rem;
}

/* Testimonials & Endorsements Section */
.testimonials-layout {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 1.25rem;
  align-items: start;
}

.testimonials-feed .cards-grid {
  grid-template-columns: 1fr;
}

.testimonial-card {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.testimonial-quote {
  color: var(--text-primary);
  font-size: 0.94rem;
  line-height: 1.65;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border-subtle);
}

.testimonial-name {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.testimonial-role {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
}

.testimonial-empty-card {
  border-style: dashed;
  background: rgba(18, 20, 29, 0.45);
}

.testimonial-empty-text {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.65;
}

.testimonial-form-card {
  display: flex;
  flex-direction: column;
}

/* Contact & Leave a Message Section */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 1.25rem;
  align-items: stretch;
}

.contact-info-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.75rem;
}

.contact-title {
  font-size: 1.45rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 0.65rem;
}

.contact-desc {
  color: var(--text-secondary);
  font-size: 0.94rem;
  margin-bottom: 1.35rem;
}

.message-card {
  display: flex;
  flex-direction: column;
}

.message-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.9rem;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-secondary);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.68rem 0.85rem;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  transition: border-color var(--transition), background var(--transition);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  background: rgba(255, 255, 255, 0.055);
}

.form-select option {
  background: #12141d;
  color: var(--text-primary);
}

.form-textarea {
  resize: vertical;
  min-height: 104px;
}

.form-footer {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 0.25rem;
}

.form-status {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.form-status.is-success {
  color: var(--accent-emerald);
}

.socials-list {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.social-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid var(--border-subtle);
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--transition);
}

.social-row:hover {
  border-color: var(--border-highlight);
  background: rgba(255, 255, 255, 0.06);
  transform: translateX(2px);
}

.social-label {
  font-weight: 500;
  font-size: 0.9rem;
}

.social-handle {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 2.25rem 0;
  margin-top: 2rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.back-to-top {
  color: var(--text-secondary);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.back-to-top:hover {
  color: var(--text-primary);
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  padding: 0.75rem 1.15rem;
  border-radius: var(--radius-md);
  background: #181b26;
  border: 1px solid var(--border-highlight);
  color: var(--text-primary);
  font-size: 0.86rem;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: all var(--transition);
  z-index: 100;
}

.toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive Adjustments */
@media (max-width: 920px) {
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pillars-grid,
  .principles-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 820px) {
  .mobile-menu-btn {
    display: inline-flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    padding: 0.85rem 1.25rem 1.1rem;
    background: rgba(12, 14, 22, 0.97);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-highlight);
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.55);
  }

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

  .nav-links a {
    padding: 0.65rem 0.75rem;
    border-radius: 8px;
    font-size: 0.94rem;
  }

  .nav-links a:hover {
    background: rgba(255, 255, 255, 0.05);
  }

  .tracks-grid,
  .skills-matrix-grid,
  .testimonials-layout,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 0.85rem;
  }

  .timeline-meta {
    padding-bottom: 0.65rem;
    border-bottom: 1px solid var(--border-subtle);
  }

  .hero {
    padding: 2.75rem 0 2.5rem;
  }

  .hero-layout {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .hero-portrait-wrap {
    order: -1;
    justify-content: flex-start;
  }

  .hero-portrait {
    width: 116px;
    height: 116px;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 1.1rem;
  }

  .card {
    padding: 1.25rem;
  }

  .status-badge {
    font-size: 0.74rem;
    padding: 0.32rem 0.7rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.65rem;
  }

  .metric-card {
    padding: 0.95rem 1rem;
  }

  .metric-value {
    font-size: 1.3rem;
  }

  .metric-label {
    font-size: 0.78rem;
  }

  .metric-context {
    font-size: 0.7rem;
  }
}