:root {
  --primary: #2563eb;
  --primary-dark: #1e4ed8;
  --accent: #38bdf8;
  --background: #f5f7fb;
  --surface: #ffffff;
  --surface-dark: rgba(15, 23, 42, 0.75);
  --text: #1f2937;
  --muted: #4b5563;
  --shadow: 0 18px 40px rgba(15, 23, 42, 0.12);
  --radius-lg: 20px;
  --radius-sm: 14px;
}

body.dark {
  --background: #0b1220;
  --surface: rgba(15, 23, 42, 0.85);
  --surface-dark: rgba(15, 23, 42, 0.92);
  --text: #e2e8f0;
  --muted: #94a3b8;
  --shadow: 0 24px 65px rgba(2, 6, 23, 0.55);
}

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background: var(--background);
  color: var(--text);
  transition: background 0.35s ease, color 0.35s ease;
  line-height: 1.6;
}

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

a {
  color: var(--primary);
}

/* Navigation */
.nav-bar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.18);
  transition: transform 0.35s ease;
  will-change: transform;
}

.nav-inner {
  width: min(1080px, 92vw);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 0.9rem 0;
  color: #e2e8f0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.95rem;
  font-weight: 700;
}

.brand-badge {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.95), rgba(56, 189, 248, 0.75));
  box-shadow: 0 10px 22px rgba(37, 99, 235, 0.4);
  display: grid;
  place-items: center;
  font-size: 1.05rem;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.4rem;
  margin: 0;
  padding: 0;
  align-items: center;
}

.nav-bar.nav-bar--hidden {
  transform: translateY(-110%);
}

.nav-links a {
  color: inherit;
  text-decoration: none;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  position: relative;
  padding-bottom: 0.1rem;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s ease;
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.dark-toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.3rem 0.6rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  background: rgba(15, 23, 42, 0.55);
  color: #fff;
  cursor: pointer;
  backdrop-filter: blur(8px);
  transition: border-color 0.3s ease, background 0.3s ease;
}

.dark-toggle:hover,
.dark-toggle:focus-visible {
  border-color: rgba(226, 232, 240, 0.65);
}

.dark-toggle:focus-visible {
  outline: 2px solid rgba(56, 189, 248, 0.6);
  outline-offset: 2px;
}

.dark-toggle__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.1rem;
  font-size: 0.9rem;
  line-height: 1;
  color: rgba(226, 232, 240, 0.85);
  transition: opacity 0.3s ease, color 0.3s ease;
}

.dark-toggle__icon--moon {
  opacity: 0.5;
}

.dark-toggle__track {
  position: relative;
  width: 36px;
  height: 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.35);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.dark-toggle__thumb {
  position: absolute;
  top: 50%;
  left: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.25);
  transform: translate(0, -50%);
  transition: transform 0.3s ease, background 0.3s ease;
}

body.dark .dark-toggle {
  border-color: rgba(148, 163, 184, 0.45);
  background: rgba(148, 163, 184, 0.18);
}

body.dark .dark-toggle__icon {
  color: rgba(248, 250, 252, 0.92);
}

body.dark .dark-toggle__icon--sun {
  opacity: 0.5;
}

body.dark .dark-toggle__icon--moon {
  opacity: 1;
}

body.dark .dark-toggle__track {
  background: rgba(15, 23, 42, 0.65);
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.4);
}

body.dark .dark-toggle__thumb {
  transform: translate(16px, -50%);
  background: #e2e8f0;
}

.menu-toggle {
  display: none;
  font-size: 1.25rem;
  cursor: pointer;
  border: 1px solid rgba(226, 232, 240, 0.35);
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.55);
  color: inherit;
}

header {
  background: linear-gradient(135deg, #0f172a 0%, #1d2b44 40%, #0f172a 100%);
  color: #e5ecff;
  padding: 3.5rem 0;
  position: relative;
  overflow: hidden;
}

.hero-inner {
  width: min(1080px, 92vw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4rem;
  align-items: center;
}

.hero-copy {
  display: grid;
  gap: 1.2rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.22);
  color: rgba(226, 232, 240, 0.9);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 600;
}

header h1 {
  margin: 0;
  font-size: clamp(2.3rem, 4vw, 2.9rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.hero-lead {
  margin: 0;
  color: rgba(226, 232, 240, 0.85);
  font-size: 1.05rem;
  max-width: 32rem;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.2rem;
}

.hero-metrics div {
  padding: 1rem 1.1rem;
  border-radius: var(--radius-sm);
  background: rgba(15, 23, 42, 0.35);
  border: 1px solid rgba(148, 163, 184, 0.25);
  box-shadow: 0 18px 40px rgba(2, 6, 23, 0.35);
  display: grid;
  gap: 0.25rem;
  text-align: left;
}

.metric-value {
  font-size: 1.35rem;
  font-weight: 700;
  color: #fff;
}

.metric-label {
  font-size: 0.85rem;
  color: rgba(226, 232, 240, 0.7);
  letter-spacing: 0.02em;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.cta-primary,
.cta-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.45rem;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.cta-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 18px 36px rgba(37, 99, 235, 0.35);
}

.cta-primary:hover,
.cta-primary:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 22px 40px rgba(30, 64, 175, 0.45);
}

.cta-secondary {
  border: 1px solid rgba(226, 232, 240, 0.5);
  color: rgba(226, 232, 240, 0.85);
}

.cta-secondary:hover,
.cta-secondary:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(226, 232, 240, 0.9);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem;
  font-size: 0.92rem;
  color: rgba(226, 232, 240, 0.8);
}

.hero-meta a {
  color: inherit;
  text-decoration: none;
  font-weight: 600;
}

.hero-visual {
  position: relative;
  height: 100%;
  min-height: 300px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.25);
  background: radial-gradient(circle at 20% 20%, rgba(37, 99, 235, 0.35), transparent 55%),
              radial-gradient(circle at 80% 70%, rgba(56, 189, 248, 0.25), transparent 60%),
              rgba(15, 23, 42, 0.65);
  box-shadow: 0 40px 80px rgba(5, 12, 28, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-visual__gradient,
.hero-visual__glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-visual__gradient {
  background: linear-gradient(120deg, rgba(37, 99, 235, 0.4), transparent 50%),
              linear-gradient(-130deg, rgba(15, 23, 42, 0.65), transparent 55%);
}

.hero-visual__grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 110px);
  grid-template-rows: repeat(3, 90px);
  gap: 14px;
  transform: rotate(-6deg);
}

.hero-visual__grid span {
  display: block;
  border-radius: 16px;
  border: 1px solid rgba(226, 232, 240, 0.22);
  background: rgba(15, 23, 42, 0.45);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.hero-visual__grid span:nth-child(3),
.hero-visual__grid span:nth-child(5),
.hero-visual__grid span:nth-child(8) {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.8), rgba(56, 189, 248, 0.6));
  box-shadow: 0 25px 40px rgba(37, 99, 235, 0.4);
}

.hero-visual__glow {
  background: radial-gradient(circle at 70% 25%, rgba(56, 189, 248, 0.35), transparent 55%);
}

main {
  max-width: 1100px;
  margin: 2rem auto;
  padding: 0 1rem;
}

section {
  margin-bottom: 3.5rem;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 1.2rem;
}

h2 {
  color: var(--primary);
  margin: 0;
  font-size: clamp(2rem, 4vw, 2.5rem);
  letter-spacing: -0.01em;
}

.profile-section {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 3rem;
  box-shadow: var(--shadow);
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 2.5rem;
  align-items: center;
}

.profile-copy {
  display: grid;
  gap: 1.3rem;
}

.profile-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.profile-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.profile-actions a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.75rem 1.35rem;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid rgba(37, 99, 235, 0.35);
  color: var(--primary);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.profile-actions a:hover,
.profile-actions a:focus-visible {
  transform: translateY(-2px);
  border-color: var(--primary-dark);
  box-shadow: 0 18px 32px rgba(37, 99, 235, 0.18);
}

.profile-panels {
  display: grid;
  gap: 1.4rem;
}

.profile-panel {
  background: rgba(37, 99, 235, 0.08);
  border: 1px solid rgba(37, 99, 235, 0.15);
  border-radius: var(--radius-sm);
  padding: 1.4rem 1.6rem;
  display: grid;
  gap: 0.85rem;
  box-shadow: 0 22px 45px rgba(15, 23, 42, 0.12);
}

.panel-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--primary-dark);
}

.panel-list {
  display: grid;
  gap: 0.6rem;
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

.panel-list li {
  font-size: 0.98rem;
}

.section-image {
  width: 100%;
  max-height: 220px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  margin-bottom: 1.5rem;
}

.services-section {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 3rem;
  box-shadow: var(--shadow);
  display: grid;
  gap: 2.2rem;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.6rem;
}

.service-card {
  background: rgba(15, 23, 42, 0.04);
  border: 1px solid rgba(37, 99, 235, 0.12);
  border-radius: var(--radius-sm);
  padding: 1.8rem;
  display: grid;
  gap: 0.8rem;
  box-shadow: 0 20px 45px rgba(15, 23, 42, 0.1);
}

.service-card h3 {
  margin: 0;
  color: var(--primary);
  font-size: 1.2rem;
}

.service-card ul {
  margin: 0;
  padding-left: 1.2rem;
  display: grid;
  gap: 0.45rem;
  color: var(--muted);
}

.service-card .badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.18);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.testimonial {
  display: grid;
  gap: 0.6rem;
  background: rgba(15, 23, 42, 0.75);
  color: rgba(226, 232, 240, 0.9);
  padding: 2rem;
  border-radius: var(--radius-sm);
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.25);
}

.testimonial::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 20%, rgba(56, 189, 248, 0.25), transparent 60%);
  pointer-events: none;
}

.testimonial blockquote {
  margin: 0;
  font-size: 1.1rem;
  line-height: 1.5;
  font-weight: 600;
}

.testimonial cite {
  font-style: normal;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: rgba(226, 232, 240, 0.7);
}

.contact-section {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 3rem;
  box-shadow: var(--shadow);
  display: grid;
  gap: 2rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  align-items: start;
}

.contact-card {
  background: rgba(37, 99, 235, 0.07);
  border: 1px solid rgba(37, 99, 235, 0.18);
  border-radius: var(--radius-sm);
  padding: 1.8rem;
  display: grid;
  gap: 0.8rem;
  box-shadow: 0 22px 45px rgba(15, 23, 42, 0.1);
}

.contact-card strong {
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: rgba(37, 99, 235, 0.7);
}

.contact-card a {
  color: var(--primary);
  font-weight: 600;
  text-decoration: none;
}

.contact-form {
  background: rgba(15, 23, 42, 0.04);
  border: 1px solid rgba(37, 99, 235, 0.15);
  border-radius: var(--radius-sm);
  padding: 1.8rem;
  display: grid;
  gap: 1.2rem;
}

.contact-form label {
  font-weight: 600;
  color: var(--text);
  font-size: 0.95rem;
}

.contact-form input,
.contact-form textarea,
.contact-form select {
  width: 100%;
  border: 1px solid rgba(148, 163, 184, 0.4);
  border-radius: 10px;
  padding: 0.75rem 1rem;
  font-size: 0.95rem;
  font-family: inherit;
  background: #fff;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

body.dark .contact-form input,
body.dark .contact-form textarea,
body.dark .contact-form select {
  background: rgba(15, 23, 42, 0.85);
  color: var(--text);
}

.contact-form input:focus,
.contact-form textarea:focus,
.contact-form select:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.18);
}

.contact-form textarea {
  min-height: 150px;
  resize: vertical;
}

.contact-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  border: none;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.contact-submit:hover,
.contact-submit:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 18px 36px rgba(37, 99, 235, 0.35);
}

.project-section {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 3rem;
  box-shadow: var(--shadow);
  position: relative;
}

.project-intro {
  margin-bottom: 2rem;
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 46rem;
}

.timeline {
  position: relative;
  padding-left: 2.5rem;
  display: grid;
  gap: 2rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 1rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.25), transparent 85%);
}

.timeline-item {
  background: rgba(37, 99, 235, 0.05);
  border: 1px solid rgba(37, 99, 235, 0.12);
  border-radius: var(--radius-sm);
  padding: 1.7rem 1.8rem 1.7rem 2rem;
  box-shadow: 0 20px 45px rgba(15, 23, 42, 0.12);
  position: relative;
  display: grid;
  gap: 0.75rem;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -1.75rem;
  top: 1.8rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 0 0 6px rgba(37, 99, 235, 0.12);
}

.timeline-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.6rem;
  align-items: baseline;
}

.timeline-company {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
}

.timeline-meta {
  font-weight: 600;
  color: var(--muted);
  font-size: 0.95rem;
}

.timeline-role {
  font-weight: 600;
  color: var(--text);
}

.timeline-body {
  display: grid;
  gap: 0.6rem;
  color: var(--muted);
}

.timeline-body ul {
  margin: 0;
  padding-left: 1.2rem;
  display: grid;
  gap: 0.45rem;
}

.timeline-tech {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 0.02em;
}

.cert-section {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 3rem;
  box-shadow: var(--shadow);
  display: grid;
  gap: 2rem;
}

.certificate-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.6rem;
}

.certificate-card {
  background: rgba(37, 99, 235, 0.06);
  border: 1px solid rgba(37, 99, 235, 0.15);
  border-radius: var(--radius-sm);
  padding: 1.6rem 1.8rem;
  box-shadow: 0 22px 45px rgba(15, 23, 42, 0.12);
  display: grid;
  gap: 0.8rem;
}

.certificate-card h3 {
  margin: 0;
  font-size: 1.15rem;
  color: var(--primary);
}

.certificate-card span {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: rgba(37, 99, 235, 0.75);
}

.certificate-card ul {
  margin: 0;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.35rem;
  color: var(--muted);
  font-size: 0.98rem;
}

@media(max-width: 768px) {
  .nav-inner {
    width: min(96vw, 100%);
    position: relative;
    flex-wrap: wrap;
    gap: 1rem;
  }
  .nav-actions {
    width: 100%;
    justify-content: space-between;
  }
  .menu-toggle {
    display: block;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: calc(100% + 0.6rem);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 1rem;
    padding: 1.1rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(148, 163, 184, 0.25);
    background: rgba(15, 23, 42, 0.96);
    box-shadow: 0 24px 48px rgba(2, 6, 23, 0.45);
    backdrop-filter: blur(16px);
    z-index: 1000;
  }
  .nav-links.show {
    display: flex;
  }
  header {
    padding: 3rem 0 2.7rem;
  }
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .hero-copy {
    text-align: center;
    align-items: center;
  }
  .hero-lead {
    margin: 0 auto;
  }
  .hero-cta,
  .hero-meta {
    justify-content: center;
  }
  .hero-visual {
    max-width: 480px;
    margin: 0 auto;
  }
  .hero-metrics {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  }
  main {
    margin: 1.8rem auto;
    padding: 0 1.2rem;
  }
  section {
    margin-bottom: 2.8rem;
  }
  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.9rem;
  }
  .profile-section {
    grid-template-columns: 1fr;
    padding: 2.4rem 2rem;
    gap: 2rem;
  }
  .profile-panels {
    grid-template-columns: 1fr;
  }
  .services-section,
  .cert-section,
  .project-section,
  .contact-section {
    padding: 2.4rem;
    gap: 2rem;
  }
  .timeline {
    padding-left: 1.9rem;
  }
  .timeline-item {
    padding: 1.5rem 1.5rem 1.5rem 1.7rem;
  }
  .timeline-item::before {
    left: -1.45rem;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media(max-width: 520px) {
  header {
    padding: 2.8rem 0 2.4rem;
  }
  .hero-copy {
    gap: 1rem;
  }
  header h1 {
    font-size: 2.1rem;
  }
  .hero-lead {
    font-size: 0.98rem;
  }
  .hero-cta {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-meta {
    flex-direction: column;
    gap: 0.6rem;
    align-items: center;
  }
  .hero-metrics {
    grid-template-columns: 1fr;
  }
  .hero-metrics div {
    text-align: center;
  }
  .hero-visual__grid {
    grid-template-columns: repeat(3, 90px);
    grid-template-rows: repeat(3, 70px);
    gap: 10px;
  }
  .hero-visual {
    min-height: 250px;
  }
  .services-section,
  .cert-section,
  .project-section,
  .contact-section {
    padding: 1.8rem 1.4rem;
    gap: 1.6rem;
  }
  .services-grid {
    grid-template-columns: 1fr;
  }
  main {
    margin: 1.5rem auto;
    padding: 0 0.9rem;
  }
  section {
    margin-bottom: 2.6rem;
  }
  .profile-section {
    padding: 1.8rem 1.4rem;
    gap: 1.6rem;
  }
  .profile-copy p {
    font-size: 0.98rem;
  }
  .profile-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .profile-actions a {
    justify-content: center;
  }
  .profile-panel {
    padding: 1.25rem 1.4rem;
  }
  .contact-grid {
    gap: 1.5rem;
  }
  .testimonial {
    padding: 1.6rem;
  }
  .timeline {
    padding-left: 1.5rem;
  }
  .timeline-item::before {
    left: -1.1rem;
  }
}

@media(max-width: 420px) {
  .brand {
    gap: 0.6rem;
    font-size: 0.9rem;
  }
  .brand-badge {
    width: 36px;
    height: 36px;
    font-size: 0.95rem;
  }
  .nav-actions {
    gap: 0.5rem;
  }
  .menu-toggle {
    padding: 0.35rem 0.65rem;
    font-size: 1rem;
  }
  .dark-toggle {
    padding: 0.25rem 0.5rem;
    gap: 0.35rem;
  }
  .dark-toggle__track {
    width: 32px;
  }
  .dark-toggle__thumb {
    width: 16px;
    height: 16px;
  }
  header h1 {
    font-size: 1.9rem;
  }
  .hero-lead {
    font-size: 0.9rem;
  }
  .metric-value {
    font-size: 1.2rem;
  }
  .metric-label {
    font-size: 0.8rem;
  }
}

@media(max-height: 580px) {
  .nav-inner {
    padding: 0.55rem 0;
  }
  .brand span:last-child {
    display: none;
  }
  .brand-badge {
    width: 34px;
    height: 34px;
    font-size: 0.9rem;
  }
  .nav-actions {
    gap: 0.5rem;
  }
  .dark-toggle {
    padding: 0.25rem 0.5rem;
    gap: 0.35rem;
  }
  .dark-toggle__track {
    width: 32px;
  }
  .dark-toggle__thumb {
    width: 16px;
    height: 16px;
  }
  header {
    padding: 2.6rem 0 2.2rem;
  }
  .hero-inner {
    gap: 2rem;
  }
}

footer {
  text-align: center;
  padding: 2rem;
  background: #222;
  color: #ccc;
}

footer a {
  color: var(--primary);
  text-decoration: none;
}