:root {
  --bg: #f7f5ee;
  --surface: #ffffff;
  --surface-2: #f0ede3;
  --text: #101726;
  --muted: #5b6372;
  --line: #d8d2c4;
  --brand: #007f8c;
  --brand-strong: #00626d;
  --accent: #ff9f1c;
  --font-display: 'Sora', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --nav-h: 72px;
  --shadow: 0 18px 60px rgba(16, 23, 38, 0.12);
}

body.dark {
  --bg: #0d121f;
  --surface: #131b2c;
  --surface-2: #1b253a;
  --text: #eef3ff;
  --muted: #9aa6c0;
  --line: #293652;
  --brand: #35d0dc;
  --brand-strong: #85e7f0;
  --accent: #ffbf46;
  --shadow: 0 18px 60px rgba(0, 0, 0, 0.35);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.55;
  overflow-x: hidden;
  transition: background 0.3s ease, color 0.3s ease;
}

.page-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 12% 14%, rgba(0, 127, 140, 0.14), transparent 36%),
    radial-gradient(circle at 82% 20%, rgba(255, 159, 28, 0.17), transparent 32%),
    radial-gradient(circle at 55% 88%, rgba(0, 127, 140, 0.08), transparent 30%);
}

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

::selection {
  background: var(--brand);
  color: #fff;
}

.wrap {
  width: min(1140px, calc(100% - 2.4rem));
  margin: 0 auto;
}

.section {
  padding: 6.5rem 0;
  border-top: 1px solid var(--line);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--muted);
  margin-bottom: 1rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 3.1rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 1.8rem;
  max-width: 16ch;
}

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.4rem;
  z-index: 20;
  transition: background 0.25s ease, border-color 0.25s ease;
}

.nav.scrolled {
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.menu-toggle {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.5rem 0.75rem;
  border-radius: 10px;
  font-weight: 700;
  display: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.05rem;
}

.nav-link {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--muted);
}

.nav-link:hover,
.nav-link-accent {
  color: var(--brand);
}

.theme-toggle {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  border-radius: 10px;
  padding: 0.48rem 0.75rem;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
  cursor: pointer;
}

.hero {
  padding-top: calc(var(--nav-h) + 4.6rem);
  border-top: 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.9fr;
  gap: 2rem;
  align-items: start;
}

.hero-copy h1 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 5rem);
  line-height: 0.95;
  letter-spacing: -0.03em;
  max-width: 11ch;
}

.hero-copy h1 span {
  color: var(--brand);
  display: inline-block;
}

.hero-sub {
  margin-top: 1.5rem;
  max-width: 58ch;
  color: var(--muted);
  font-size: 1.08rem;
}

.hero-cta {
  display: flex;
  gap: 0.9rem;
  margin-top: 1.8rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  font-weight: 700;
  letter-spacing: 0.03em;
  padding: 0.8rem 1.15rem;
  border: 1px solid transparent;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--brand);
  color: #fff;
}

.btn-primary:hover {
  background: var(--brand-strong);
}

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

.social-row {
  margin-top: 1.3rem;
  display: flex;
  gap: 0.95rem;
  flex-wrap: wrap;
}

.social-row a {
  font-size: 0.86rem;
  color: var(--muted);
  border-bottom: 1px solid transparent;
}

.social-row a:hover {
  border-color: var(--brand);
  color: var(--brand);
}

.signal-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 1.3rem;
  box-shadow: var(--shadow);
}

.signal-title {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  font-weight: 700;
  color: var(--muted);
  margin-bottom: 1rem;
}

.signal-panel ul {
  list-style: none;
  display: grid;
  gap: 0.72rem;
}

.signal-panel li {
  display: grid;
  gap: 0.2rem;
  padding: 0.7rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-2);
}

.signal-panel span {
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.signal-panel strong {
  font-weight: 600;
  font-size: 0.92rem;
}

.kpi-grid {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.8rem;
}

.kpi-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.1rem;
}

.kpi-value {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  line-height: 1;
  color: var(--brand);
  margin-bottom: 0.4rem;
}

.kpi-label {
  font-size: 0.82rem;
  color: var(--muted);
}

.case-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.case-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.4rem;
}

.case-tag {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--brand);
}

.case-head h3 {
  font-family: var(--font-display);
  font-size: 1.45rem;
  line-height: 1.2;
  margin-top: 0.45rem;
}

.case-desc {
  color: var(--muted);
  margin-top: 0.9rem;
}

.case-metrics {
  margin-top: 1rem;
  list-style: none;
  display: grid;
  gap: 0.62rem;
}

.case-metrics li {
  display: grid;
  gap: 0.16rem;
  border-left: 3px solid var(--brand);
  padding-left: 0.65rem;
}

.case-metrics span {
  font-size: 0.76rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.case-metrics strong {
  font-size: 0.92rem;
}

.case-link {
  display: inline-block;
  margin-top: 1rem;
  font-weight: 600;
  color: var(--brand);
}

.mini-projects {
  margin-top: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem;
}

.mini-title {
  text-transform: uppercase;
  letter-spacing: 0.13em;
  font-size: 0.72rem;
  color: var(--muted);
  margin-bottom: 0.65rem;
}

.mini-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.mini-row a {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.35rem 0.8rem;
  font-size: 0.86rem;
}

.mini-row a:hover {
  border-color: var(--brand);
  color: var(--brand);
}

.timeline {
  display: grid;
  gap: 0.75rem;
}

.timeline-item {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 14px;
  padding: 1rem;
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 0.9rem;
}

.timeline-date {
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  font-weight: 700;
}

.timeline-item h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin-bottom: 0.35rem;
}

.timeline-item p {
  color: var(--muted);
}

.timeline-tags {
  margin-top: 0.5rem;
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  color: var(--text) !important;
}

.stack-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  align-items: start;
}

.stack-copy {
  color: var(--muted);
  max-width: 48ch;
}

.stack-groups {
  display: grid;
  gap: 0.7rem;
}

.stack-groups article {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem;
}

.stack-groups h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  margin-bottom: 0.45rem;
}

.stack-groups p {
  color: var(--muted);
  font-size: 0.92rem;
}

.certs-block {
  margin-top: 1.2rem;
}

.certs-header {
  margin-bottom: 0.85rem;
}

.certs-header .eyebrow {
  margin-bottom: 0.55rem;
}

.certs-intro {
  color: var(--muted);
  font-size: 0.92rem;
  max-width: 68ch;
}

.certs-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.7rem;
}

.cert-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem;
  display: grid;
  gap: 0.42rem;
}

.cert-issuer {
  color: var(--brand);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.cert-card h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  line-height: 1.25;
}

.cert-code {
  color: var(--muted);
  font-size: 0.82rem;
}

.cert-card a {
  margin-top: 0.25rem;
  color: var(--brand);
  font-size: 0.84rem;
  font-weight: 600;
}

.cert-card a:hover {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.insight-card {
  background: linear-gradient(115deg, var(--surface), var(--surface-2));
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 1.5rem;
}

.insight-card p {
  color: var(--muted);
  max-width: 58ch;
  margin-bottom: 1rem;
}

.contact {
  border-top: 1px solid var(--line);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1rem;
  align-items: end;
}

.contact-grid p {
  color: var(--muted);
}

.contact-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 2.2rem;
  padding-top: 1.2rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.84rem;
}

.site-footer a:hover {
  color: var(--brand);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

[data-reveal].revealed {
  opacity: 1;
  transform: none;
}

.progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 30;
  background: transparent;
}

.progress > span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--brand));
}

@media (max-width: 980px) {
  .hero-grid,
  .stack-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .kpi-grid,
  .case-grid {
    grid-template-columns: 1fr 1fr;
  }

  .contact-actions {
    justify-content: flex-start;
  }

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

@media (max-width: 780px) {
  .menu-toggle {
    display: inline-flex;
    align-items: center;
  }

  .nav-links {
    position: absolute;
    top: calc(var(--nav-h) - 6px);
    left: 1rem;
    right: 1rem;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 0.9rem;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    box-shadow: var(--shadow);
  }

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

  .nav-link,
  .theme-toggle {
    width: 100%;
  }

  .theme-toggle {
    text-align: left;
  }

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

@media (max-width: 640px) {
  .kpi-grid,
  .case-grid {
    grid-template-columns: 1fr;
  }

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

  .section {
    padding: 5.4rem 0;
  }
}