/* —— Design tokens: white, dark blue, grey —— */
:root {
  --color-bg: #fafbfc;
  --color-surface: #ffffff;
  --color-text: #1a2332;
  --color-text-muted: #5c6573;
  --color-border: #e2e6eb;
  --color-navy: #0c2340;
  --color-navy-hover: #153a5c;
  --color-accent: #1e4d7b;
  --color-grey-fill: #f0f2f5;
  --font: "DM Sans", system-ui, -apple-system, sans-serif;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 1px 2px rgba(12, 35, 64, 0.06), 0 8px 24px rgba(12, 35, 64, 0.06);
  --header-h: 64px;
  --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
  --transition: 0.22s var(--ease);
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .reveal {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  padding: 0.5rem 1rem;
  background: var(--color-navy);
  color: #fff;
  z-index: 1000;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.skip-link:focus {
  top: 1rem;
}

.container {
  width: min(1120px, 100% - 2rem);
  margin-inline: auto;
}

.container.narrow {
  width: min(720px, 100% - 2rem);
}

/* —— Header —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  gap: 1rem;
}

.logo {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-navy);
  text-decoration: none;
  letter-spacing: -0.02em;
  transition: color var(--transition);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
  background: none;
  border: none;
  cursor: pointer;
  border-radius: var(--radius-sm);
}

.nav-toggle-bar {
  width: 22px;
  height: 2px;
  background: var(--color-navy);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9375rem;
  transition: color var(--transition);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--color-navy);
}

.nav-cta {
  padding: 0.45rem 1rem;
  background: var(--color-navy);
  color: #fff !important;
  border-radius: var(--radius-sm);
  transition: background var(--transition), transform var(--transition);
}

.nav-cta:hover,
.nav-cta:focus-visible {
  background: var(--color-navy-hover);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem;
    box-shadow: var(--shadow);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition: max-height 0.35s var(--ease), opacity 0.25s var(--ease), visibility 0.25s;
  }

  .site-nav.is-open {
    max-height: 320px;
    opacity: 1;
    visibility: visible;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav li {
    border-bottom: 1px solid var(--color-border);
  }

  .site-nav li:last-child {
    border-bottom: none;
  }

  .site-nav a {
    display: block;
    padding: 0.75rem 0;
  }

  .nav-cta {
    text-align: center;
    margin-top: 0.5rem;
  }
}

/* —— Sections —— */
.section {
  padding: clamp(3.5rem, 8vw, 5.5rem) 0;
}

.section-alt {
  background: var(--color-grey-fill);
}

.section-title {
  font-size: clamp(1.65rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--color-navy);
  letter-spacing: -0.03em;
  margin: 0 0 0.75rem;
}

.section-head .section-title {
  margin-bottom: 0.5rem;
}

.section-intro {
  color: var(--color-text-muted);
  max-width: 42rem;
  margin: 0;
  font-size: 1.0625rem;
}

.text-center {
  text-align: center;
}

.text-center .section-intro {
  margin-inline: auto;
}

/* —— Hero —— */
.hero {
  padding-top: clamp(3rem, 10vw, 5rem);
  padding-bottom: clamp(4rem, 12vw, 6rem);
  background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-bg) 100%);
  border-bottom: 1px solid var(--color-border);
}

.hero-inner {
  max-width: 820px;
}

.hero-eyebrow {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  margin: 0 0 1rem;
}

.hero-title {
  font-size: clamp(1.85rem, 4.5vw, 2.65rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-navy);
  letter-spacing: -0.035em;
  margin: 0 0 1.25rem;
}

.hero-lead {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  margin: 0 0 1.75rem;
  max-width: 38rem;
}

.hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 0 0 2rem;
  padding: 0;
}

.hero-pills li {
  padding: 0.4rem 0.9rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-navy);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* —— Buttons —— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.35rem;
  font-family: var(--font);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform 0.15s var(--ease);
}

.btn:active {
  transform: scale(0.98);
}

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

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

.btn-secondary {
  background: transparent;
  color: var(--color-navy);
  border-color: var(--color-border);
}

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

.btn-icon svg {
  flex-shrink: 0;
}

/* —— Prose —— */
.prose .lead {
  font-size: 1.125rem;
  color: var(--color-text);
  margin-top: 0;
}

.prose p {
  color: var(--color-text-muted);
  margin: 0 0 1rem;
}

.prose-subtitle {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-navy);
  margin: 1.75rem 0 0.5rem;
}

.inline-code {
  font-family: ui-monospace, monospace;
  font-size: 0.9em;
  background: var(--color-grey-fill);
  padding: 0.15em 0.4em;
  border-radius: 4px;
}

/* —— Project cards —— */
.project-grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 720px) {
  .project-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.project-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem 1.5rem 1.35rem;
  box-shadow: 0 1px 0 rgba(12, 35, 64, 0.04);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.project-card:hover {
  border-color: #c5cdd8;
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.project-card-top {
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.project-tag {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}

.project-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-navy);
  margin: 0;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.project-dl {
  margin: 0;
}

.project-dl dt {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-navy);
  margin-top: 1rem;
}

.project-dl dt:first-of-type {
  margin-top: 0;
}

.project-dl dd {
  margin: 0.35rem 0 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

/* —— Skills —— */
.skills-grid {
  display: grid;
  gap: 1.25rem;
  margin-top: 2rem;
}

@media (min-width: 600px) {
  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .skill-block-wide {
    grid-column: 1 / -1;
  }
}

.skill-block {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.35rem 1.5rem;
  transition: border-color var(--transition);
}

.skill-block:hover {
  border-color: #c5cdd8;
}

.skill-block-title {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-accent);
  margin: 0 0 0.85rem;
}

.skill-list {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

.skill-list li {
  margin-bottom: 0.4rem;
}

.skill-list-inline {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  list-style: none;
  padding: 0;
}

.skill-list-inline li {
  margin: 0;
  padding-left: 1rem;
  position: relative;
}

.skill-list-inline li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-accent);
}

/* —— Insights —— */
.insights-placeholder {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.insights-placeholder li {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 1.15rem 1.25rem;
  background: var(--color-surface);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text-muted);
  font-size: 0.98rem;
  line-height: 1.5;
}

.insights-placeholder-icon {
  flex-shrink: 0;
  color: var(--color-accent);
  margin-top: 2px;
}

.insights-placeholder strong {
  color: var(--color-navy);
}

/* —— Resume —— */
.resume-intro {
  margin-bottom: 1.5rem;
}

/* —— Contact —— */
.contact-grid {
  display: grid;
  gap: 2.5rem;
  margin-top: 2rem;
}

@media (min-width: 800px) {
  .contact-grid {
    grid-template-columns: 1fr 1.1fr;
    align-items: start;
  }
}

.contact-direct {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.15rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.contact-link:hover {
  border-color: var(--color-navy);
  box-shadow: var(--shadow);
}

.contact-link-icon {
  color: var(--color-accent);
  display: flex;
}

.contact-link-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}

.contact-link-value {
  font-weight: 600;
  color: var(--color-navy);
}

.form-note {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin: 0 0 1rem;
  line-height: 1.5;
}

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

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

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

.form-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-navy);
}

.contact-form input,
.contact-form textarea {
  font-family: var(--font);
  font-size: 1rem;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(30, 77, 123, 0.15);
}

.contact-form textarea {
  resize: vertical;
  min-height: 120px;
}

.form-status {
  min-height: 1.25rem;
  font-size: 0.875rem;
  margin: 0;
}

.form-status.success {
  color: #1b6b3a;
}

.form-status.error {
  color: #b42318;
}

/* —— Footer —— */
.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-navy);
  color: rgba(255, 255, 255, 0.85);
  padding: 1.5rem 0;
  font-size: 0.875rem;
}

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

.footer-inner p {
  margin: 0;
}

.footer-top {
  color: rgba(255, 255, 255, 0.9);
  font-weight: 600;
  text-decoration: none;
}

.footer-top:hover {
  text-decoration: underline;
}

/* —— Reveal on scroll —— */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}

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

.reveal-delay-1 {
  transition-delay: 0.06s;
}

.reveal-delay-2 {
  transition-delay: 0.12s;
}

.reveal-delay-3 {
  transition-delay: 0.18s;
}

.reveal-delay-4 {
  transition-delay: 0.24s;
}

@media (prefers-reduced-motion: reduce) {
  .project-card:hover {
    transform: none;
  }
}