/* Towards Data Engineering — black, white, #004AAD */

:root {
  --bg: #000000;
  --bg-2: #0a0a0a;
  --bg-hover: rgba(255, 255, 255, 0.06);
  --ink: #ffffff;
  --ink-2: rgba(255, 255, 255, 0.72);
  --ink-3: rgba(255, 255, 255, 0.42);
  --rule: rgba(255, 255, 255, 0.14);
  --accent: #004aad;
  --accent-dim: rgba(0, 74, 173, 0.28);
  --radius: 8px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: "Roboto Mono", "SFMono-Regular", Menlo, monospace;
  --max: 736px;
  --pad: clamp(1.25rem, 5vw, 2rem);
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #ffffff;
    --bg-2: #f5f7fa;
    --bg-hover: rgba(0, 74, 173, 0.06);
    --ink: #000000;
    --ink-2: #333333;
    --ink-3: #666666;
    --rule: rgba(0, 0, 0, 0.12);
    --accent: #004aad;
    --accent-dim: rgba(0, 74, 173, 0.1);
    color-scheme: light;
  }
}

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

body {
  margin: 0;
  font-family: var(--font);
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--ink-2);
  text-decoration: none;
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

a:hover {
  color: var(--accent);
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 0.5rem 0.85rem;
  background: var(--ink);
  color: var(--bg);
  border-radius: var(--radius);
  font-size: 0.85rem;
}

.skip-link:focus {
  left: var(--pad);
  top: 0.75rem;
}

.page {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad);
  width: 100%;
  overflow-x: clip;
}

/* Nav */

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.25rem;
  border-bottom: 1px solid var(--rule);
}

.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  flex: 0 1 auto;
  min-width: 0;
  color: var(--accent);
}

.nav-brand:hover {
  color: var(--accent);
  opacity: 0.9;
}

.nav-mark {
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  flex-shrink: 0;
  display: block;
}

.nav-logo {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: inherit;
  letter-spacing: -0.01em;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
  flex: 0 1 auto;
  min-width: 0;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  font-size: 0.78rem;
  line-height: 1.2;
  color: var(--ink-3);
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--accent);
}

/* Hero / sections */

.hero {
  padding-block: clamp(2.5rem, 6vw, 4rem);
  border-bottom: 1px solid var(--rule);
}

.hero-role {
  margin: 0 0 0.75rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 400;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.hero-name {
  margin: 0 0 1.25rem;
  font-size: clamp(1.6rem, 5vw, 2rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--ink);
}

.hero-bio {
  margin: 0;
  max-width: 520px;
  color: var(--ink-2);
  line-height: 1.75;
}

.hero .form-embed {
  margin-top: 2rem;
}

.section {
  padding-block: 2.75rem;
  border-bottom: 1px solid var(--rule);
}

.section:last-of-type {
  border-bottom: none;
}

.section-label {
  margin: 0 0 1.5rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 400;
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.section-title {
  margin: 0 0 0.75rem;
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.section-body {
  margin: 0;
  color: var(--ink-2);
  line-height: 1.75;
  max-width: 520px;
}

.coming-soon {
  padding-block: clamp(2.5rem, 6vw, 4rem);
  border-bottom: none;
}

.page-intro {
  padding-block: clamp(2rem, 5vw, 3rem) 1.5rem;
  border-bottom: none;
}

.page-intro .hero-name {
  margin-bottom: 0.85rem;
}

/* Accordion (details/summary) */

.accordion {
  border-bottom: 1px solid var(--rule);
}

.accordion > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  list-style: none;
  cursor: pointer;
  padding-block: 1.25rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink);
  transition: color 0.15s ease;
}

.accordion > summary::-webkit-details-marker {
  display: none;
}

.accordion > summary::after {
  content: "+";
  flex-shrink: 0;
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--ink-3);
  transition: color 0.15s ease;
}

.accordion[open] > summary::after {
  content: "−";
  color: var(--accent);
}

.accordion > summary:hover,
.accordion > summary:hover::after {
  color: var(--accent);
}

.accordion > summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.accordion-body {
  padding-bottom: 1.75rem;
}

/* FAQ rows */

.faq {
  list-style: none;
  margin: 0;
  padding: 0;
}

.faq li {
  padding-block: 0.85rem;
  padding-inline: 0.5rem;
  margin-inline: -0.5rem;
  border-top: 1px solid var(--rule);
  border-radius: 6px;
}

.faq li:last-child {
  border-bottom: 1px solid var(--rule);
}

.faq-q {
  margin: 0 0 0.35rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink);
  line-height: 1.4;
}

.faq-a {
  margin: 0;
  font-size: 0.88rem;
  color: var(--ink-2);
  line-height: 1.6;
}

.faq-a a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.faq-a a:hover {
  color: var(--accent);
}

/* Hairline checklist */

.checklist {
  list-style: none;
  margin: 0;
  padding: 0;
}

.checklist li {
  padding-block: 0.75rem;
  padding-inline: 0.5rem;
  margin-inline: -0.5rem;
  border-top: 1px solid var(--rule);
  border-radius: 6px;
  color: var(--ink-2);
  font-size: 0.9rem;
  line-height: 1.55;
  transition: background 0.15s ease;
}

.checklist li:last-child {
  border-bottom: 1px solid var(--rule);
}

.checklist li:hover {
  background: var(--bg-hover);
}

.checklist a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.checklist a:hover {
  color: var(--accent);
}

.mono-note {
  margin: 1.5rem 0 0;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--ink-3);
  line-height: 1.65;
}

.mono-note a {
  color: var(--ink-2);
}

.mono-note a:hover {
  color: var(--accent);
}

/* Form iframe */

.form-embed {
  width: 100%;
  max-width: 100%;
  border: 1px solid var(--rule);
  border-radius: 6px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  background: #fff;
}

.form-embed iframe {
  display: block;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  height: min(1600px, 85vh);
  min-height: 1100px;
  border: 0;
}

/* Footer */

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding-block: 2rem;
  border-top: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--ink-3);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.footer a {
  color: var(--ink-3);
}

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

.icon-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--rule);
  border-radius: 6px;
  color: var(--ink-2);
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.icon-link:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-dim);
}

.icon-link svg {
  width: 0.95rem;
  height: 0.95rem;
  fill: currentColor;
}

/* Tablet */
@media (max-width: 900px) {
  :root {
    --max: 680px;
  }
}

/* Tablet and below — nav wraps cleanly */
@media (max-width: 720px) {
  .nav {
    flex-wrap: wrap;
    row-gap: 0.75rem;
  }

  .nav-brand {
    flex: 1 1 auto;
  }

  .nav-links {
    flex: 1 1 100%;
    justify-content: flex-start;
    gap: 0.35rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 0.15rem;
  }

  .nav-links::-webkit-scrollbar {
    display: none;
  }

  .nav-links a {
    padding: 0.45rem 0.55rem;
    margin-inline: -0.15rem;
    border-radius: 6px;
  }

  .nav-links a[aria-current="page"] {
    background: var(--accent-dim);
  }

  .form-embed iframe {
    height: 1400px;
    min-height: 1000px;
  }

  .footer {
    gap: 1.25rem;
  }
}

/* Phone */
@media (max-width: 480px) {
  :root {
    --pad: 1rem;
    --max: 100%;
  }

  body {
    font-size: 0.92rem;
  }

  .nav {
    padding-block: 1rem;
  }

  .nav-logo {
    font-size: 0.72rem;
  }

  .nav-links {
    gap: 0.15rem;
  }

  .nav-links a {
    font-size: 0.72rem;
    padding: 0.5rem 0.45rem;
  }

  .hero-name {
    font-size: clamp(1.4rem, 7vw, 1.75rem);
  }

  .hero-bio,
  .section-body {
    max-width: none;
  }

  .faq li,
  .checklist li {
    padding-inline: 0.25rem;
    margin-inline: -0.25rem;
  }

  .faq-q {
    font-size: 0.88rem;
  }

  .faq-a {
    font-size: 0.85rem;
  }

  .accordion > summary {
    padding-block: 1.1rem;
    font-size: 0.88rem;
    min-height: 2.75rem;
  }

  .form-embed iframe {
    height: 1250px;
    min-height: 900px;
  }

  .footer {
    flex-direction: column;
    align-items: flex-start;
    padding-block: 1.5rem;
  }

  .icon-link {
    width: 2.4rem;
    height: 2.4rem;
  }

  .mono-note {
    margin-bottom: 0.5rem;
    word-break: break-word;
  }
}

/* Very small phones */
@media (max-width: 360px) {
  .nav-logo {
    max-width: 9.5rem;
  }

  .nav-links a {
    padding-inline: 0.35rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
}