/* ============================================
   APB Data — Design Tokens & Reset
   ============================================ */

:root {
  /* Color palette */
  --color-navy: #0f2c4d;
  --color-blue: #1b4f8a;
  --color-blue-bright: #3a8fd4;
  --color-bg: #ffffff;
  --color-bg-alt: #f5f7fa;
  --color-text: #222222;
  --color-muted: #555555;
  --color-border: #e1e6ed;
  --color-light: #ffffff;

  /* Typography */
  --font-display: Georgia, 'Times New Roman', serif;
  --font-body: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Layout */
  --container-max: 1100px;
  --section-pad-y: clamp(56px, 8vw, 96px);
  --section-pad-x: clamp(20px, 4vw, 32px);

  /* Effects */
  --radius: 6px;
  --shadow: 0 6px 24px rgba(15, 44, 77, 0.08);
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
body, h1, h2, h3, h4, p, ul, ol, figure, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img { max-width: 100%; display: block; }
button { font: inherit; cursor: pointer; }
a { color: inherit; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px; /* offset for sticky nav */
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-navy);
  color: #fff;
  padding: 12px 16px;
  z-index: 100;
}
.skip-link:focus {
  left: 16px;
  top: 16px;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--section-pad-x);
}

/* Section base */
.section {
  padding: var(--section-pad-y) 0;
}
.section-alt { background: var(--color-bg-alt); }
.section-dark { background: var(--color-navy); color: var(--color-light); }

.section-label {
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--color-blue);
  font-weight: 700;
  margin-bottom: 12px;
}
.section-label-light { color: var(--color-blue-bright); }

.section-title {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.15;
  color: var(--color-navy);
  margin-bottom: 40px;
  font-weight: 700;
}
.section-title-light { color: var(--color-light); }

/* ============================================
   Site Header / Navigation
   ============================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.5px;
}
.brand-mark { color: var(--color-blue-bright); }
.brand-name { color: var(--color-navy); }

.primary-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}
.primary-nav a {
  text-decoration: none;
  color: var(--color-navy);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.3px;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s ease;
}
.primary-nav a:hover,
.primary-nav a:focus-visible {
  border-bottom-color: var(--color-blue-bright);
}
.primary-nav .nav-cta {
  background: var(--color-blue-bright);
  color: #fff;
  padding: 8px 16px;
  border-radius: var(--radius);
  border-bottom: none;
}
.primary-nav .nav-cta:hover,
.primary-nav .nav-cta:focus-visible {
  background: var(--color-blue);
  border-bottom-color: transparent;
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 0;
  padding: 8px;
  width: 40px;
  height: 40px;
  flex-direction: column;
  justify-content: space-between;
}
.nav-toggle-bar {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--color-navy);
  border-radius: 1px;
}

/* ============================================
   Hero
   ============================================ */

.hero {
  padding: clamp(80px, 12vw, 140px) 0 clamp(64px, 10vw, 120px);
  background:
    radial-gradient(circle at 90% 10%, rgba(58, 143, 212, 0.08), transparent 40%),
    radial-gradient(circle at 10% 90%, rgba(27, 79, 138, 0.06), transparent 40%),
    var(--color-bg);
}

.eyebrow {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--color-blue);
  margin-bottom: 24px;
}

.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(40px, 7vw, 72px);
  line-height: 1.05;
  color: var(--color-navy);
  font-weight: 700;
  margin-bottom: 24px;
  letter-spacing: -0.5px;
}

.hero-sub {
  font-size: clamp(17px, 2vw, 20px);
  color: var(--color-muted);
  max-width: 640px;
  margin-bottom: 40px;
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.3px;
  text-decoration: none;
  transition: transform 0.15s ease, background 0.2s ease, color 0.2s ease;
  border: 2px solid transparent;
}
.btn-primary {
  background: var(--color-blue-bright);
  color: #fff;
}
.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--color-blue);
  transform: translateY(-1px);
}
.btn-secondary {
  background: transparent;
  color: var(--color-navy);
  border-color: var(--color-navy);
}
.btn-secondary:hover,
.btn-secondary:focus-visible {
  background: var(--color-navy);
  color: #fff;
}

/* ============================================
   Services
   ============================================ */

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.service-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform 0.15s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.service-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: var(--color-blue-bright);
}

.service-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  background: rgba(58, 143, 212, 0.1);
  color: var(--color-blue);
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
}

.service-card h3 {
  font-family: var(--font-display);
  font-size: 19px;
  color: var(--color-navy);
  margin-bottom: 10px;
  font-weight: 700;
  line-height: 1.25;
}
.service-card p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.55;
}

/* ============================================
   Selected Work
   ============================================ */

.work-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.work-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: transform 0.15s ease, box-shadow 0.2s ease;
}
.work-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.work-client {
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-blue);
  font-weight: 700;
  margin-bottom: 10px;
}

.work-card h3 {
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--color-navy);
  line-height: 1.25;
  margin-bottom: 12px;
  font-weight: 700;
}

.work-summary {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.55;
  margin-bottom: 18px;
  flex-grow: 1;
}

.work-role {
  font-size: 13px;
  font-style: italic;
  color: var(--color-muted);
  margin-bottom: 14px;
  margin-top: -4px;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.tags li {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.4px;
  padding: 4px 10px;
  background: rgba(58, 143, 212, 0.1);
  color: var(--color-blue);
  border-radius: 3px;
}

/* ============================================
   Skills
   ============================================ */

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 32px;
}

.skill-group h3 {
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--color-navy);
  margin-bottom: 14px;
  font-weight: 700;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-blue-bright);
}

.skill-list li {
  font-size: 14px;
  color: var(--color-text);
  padding: 6px 0;
  border-bottom: 1px solid var(--color-border);
}
.skill-list li:last-child {
  border-bottom: none;
}

/* ============================================
   About
   ============================================ */

.about-wrap { max-width: 760px; }

.about-body p {
  font-size: 17px;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: 20px;
}
.about-body p:last-child { margin-bottom: 0; }

/* ============================================
   Contact
   ============================================ */

.contact-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 48px;
  align-items: start;
}

.contact-form .field {
  margin-bottom: 18px;
}
.contact-form label {
  display: block;
  font-size: 13px;
  letter-spacing: 0.4px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--color-light);
}
.contact-form .optional {
  font-weight: 400;
  opacity: 0.7;
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-light);
  font: inherit;
  font-size: 15px;
}
.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: rgba(255, 255, 255, 0.55);
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid var(--color-blue-bright);
  outline-offset: 2px;
  background: rgba(255, 255, 255, 0.1);
}
.contact-form textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-form .btn-primary {
  margin-top: 8px;
}

.form-note {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.55);
  margin-top: 14px;
  line-height: 1.5;
}
.form-note code {
  font-family: var(--font-mono);
  background: rgba(255, 255, 255, 0.08);
  padding: 1px 6px;
  border-radius: 3px;
}

.contact-info .contact-label {
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-blue-bright);
  margin-top: 22px;
  margin-bottom: 6px;
  font-weight: 700;
}
.contact-info .contact-label:first-child { margin-top: 0; }
.contact-info p { line-height: 1.55; }
.contact-info a {
  color: var(--color-light);
  text-decoration: underline;
  text-decoration-color: var(--color-blue-bright);
  text-underline-offset: 3px;
}

/* ============================================
   Footer
   ============================================ */

.site-footer {
  background: #0a1e35;
  color: rgba(255, 255, 255, 0.7);
  padding: 28px 0;
  font-size: 13px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-meta { color: rgba(255, 255, 255, 0.5); }

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 720px) {
  .nav-toggle {
    display: flex;
  }

  .primary-nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0;
    display: none;
  }
  .primary-nav.open {
    display: flex;
  }
  .primary-nav a {
    padding: 14px 24px;
    border-bottom: 1px solid var(--color-border);
  }
  .primary-nav a:last-child {
    border-bottom: none;
  }
  .primary-nav .nav-cta {
    margin: 12px 24px;
    text-align: center;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

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