/* ============================
   1. FONTS
   ============================ */
@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600&family=Inter:wght@300;400;500;600&display=swap');

/* ============================
   2. DESIGN SYSTEM (CSS VARIABLES)
   ============================ */
:root {
  --color-bg: #0B0C0E;
  --color-text: #F3F1EC;
  --color-text-muted: #8A8D91;
  --color-accent: #C08552;
  --color-border: #232427;

  --font-serif: 'Fraunces', serif;
  --font-sans: 'Inter', sans-serif;

  --container-width: 1200px;
  --section-padding: 120px 24px;
}

/* ============================
   3. RESET
   ============================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

h1, h2, h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  line-height: 1.15;
}

/* ============================
   4. NAVIGATION
   ============================ */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background-color: transparent;
  transition: background-color 0.4s ease, border-color 0.4s ease;
  border-bottom: 1px solid transparent;
}

#navbar.scrolled {
  background-color: rgba(11, 12, 14, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.nav-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  letter-spacing: 0.05em;
}

.nav-links {
  display: flex;
  gap: 36px;
}

.nav-links a {
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  transition: color 0.3s ease;
}

.nav-links a:hover,
.nav-links a:focus {
  color: var(--color-accent);
}

.nav-links a:focus {
  outline: 1px solid var(--color-accent);
}

/* ============================
   5. HERO
   ============================ */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(11, 12, 14, 0.5) 0%,
    rgba(11, 12, 14, 0.75) 60%,
    rgba(11, 12, 14, 0.95) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 0 24px;
  max-width: var(--container-width);
  margin: 0 auto;
  width: 100%;
}
.eyebrow {
  color: var(--color-accent);
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: 28px;
  font-weight: 500;
}

#hero h1 {
  font-size: clamp(2.8rem, 9vw, 7rem);
  letter-spacing: -0.02em;
  max-width: 950px;
  margin-bottom: 48px;
}

.hero-buttons {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.btn {
  padding: 16px 32px;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: 2px;
  transition: all 0.3s ease;
  cursor: pointer;
  display: inline-block;
}

.btn:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-bg);
}

.btn-primary:hover {
  opacity: 0.85;
}

.btn-secondary {
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ============================
   6. GENERIC SECTIONS (temporary — refined later)
   ============================ */
section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--section-padding);
}

section h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 24px;
}

footer {
  text-align: center;
  padding: 40px 24px;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--color-border);
}
/* ============================
   7. ABOUT
   ============================ */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 80px;
  align-items: start;
}

.about-text p {
  color: var(--color-text-muted);
  margin-bottom: 20px;
  max-width: 560px;
}

.about-image img {
  width: 100%;
  border-radius: 4px;
  filter: grayscale(20%);
}

@media (max-width: 800px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

/* ============================
   8. AVIATION / TIMELINE
   ============================ */
.section-intro {
  color: var(--color-text-muted);
  margin-bottom: 48px;
  max-width: 500px;
}

.timeline {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--color-border);
  margin-bottom: 48px;
}

.timeline-item {
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 28px 0;
  border-bottom: 1px solid var(--color-border);
}

.timeline-marker {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--color-accent);
  width: 48px;
  flex-shrink: 0;
}

.timeline-item h3 {
  font-size: 1.4rem;
  margin-bottom: 4px;
}

.timeline-item p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.aviation-image img {
  width: 100%;
  max-width: 500px;
  border-radius: 4px;
  filter: grayscale(20%);
}

/* ============================
   9. SELECTED WORK
   ============================ */
.work-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding: 60px 0;
  border-bottom: 1px solid var(--color-border);
}

.work-item:first-of-type {
  border-top: 1px solid var(--color-border);
}

.work-item-reverse .work-image {
  order: 2;
}

.work-item-reverse .work-details {
  order: 1;
}

.work-image img {
  width: 100%;
  border-radius: 4px;
  background-color: #16171a;
  padding: 40px;
}

.work-year {
  color: var(--color-accent);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
}

.work-details h3 {
  font-size: 2rem;
  margin: 12px 0 4px;
}

.work-role {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.work-description {
  color: var(--color-text-muted);
  margin-bottom: 20px;
  max-width: 480px;
}

.work-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  margin-bottom: 24px;
}

.work-skills li {
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  padding: 6px 12px;
  border-radius: 2px;
}

.work-link {
  color: var(--color-accent);
  font-size: 0.9rem;
  border-bottom: 1px solid var(--color-accent);
  padding-bottom: 2px;
  transition: opacity 0.3s ease;
}

.work-link:hover,
.work-link:focus {
  opacity: 0.8;
}

.work-link:focus {
  outline: 1px solid var(--color-accent);
  outline-offset: 2px;
}

@media (max-width: 800px) {
  .work-item,
  .work-item-reverse .work-image,
  .work-item-reverse .work-details {
    order: initial;
  }
  .work-item {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}
/* ============================
   10. CONTACT
   ============================ */
#contact {
  text-align: center;
  padding: 160px 24px;
}

#contact .eyebrow {
  justify-content: center;
}

.contact-email {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  margin: 24px 0 32px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 8px;
  transition: color 0.3s ease, border-color 0.3s ease;
}

.contact-email:hover,
.contact-email:focus {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.contact-email:focus {
  outline: 1px solid var(--color-accent);
  outline-offset: 4px;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 24px;
}

.social-links a {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: color 0.3s ease;
}

.social-links a:hover,
.social-links a:focus {
  color: var(--color-accent);
}

.social-links a:focus {
  outline: 1px solid var(--color-accent);
  outline-offset: 2px;
}

/* ============================
   11. SCROLL REVEAL ANIMATION
   ============================ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}
/* ============================
   13. GRAIN TEXTURE
   ============================ */
.grain {
  position: fixed;
  inset: 0;
  z-index: 300;
  pointer-events: none;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ============================
   14. CUSTOM CURSOR
   ============================ */
.cursor-dot {
  position: fixed;
  top: 0;
  left: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-accent);
  pointer-events: none;
  z-index: 400;
  transform: translate(-50%, -50%);
  transition: width 0.25s ease, height 0.25s ease, background-color 0.25s ease;
  mix-blend-mode: difference;
}

.cursor-dot.hovering {
  width: 40px;
  height: 40px;
  background-color: var(--color-text);
}

@media (max-width: 800px) {
  .cursor-dot { display: none; }
}
/* ============================
   12. MOBILE NAVIGATION
   ============================ */
#menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 200;
}

#menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

#menu-toggle.open span:first-child {
  transform: translateY(4px) rotate(45deg);
}

#menu-toggle.open span:last-child {
  transform: translateY(-4px) rotate(-45deg);
}

@media (max-width: 800px) {
  #menu-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    inset: 0;
    background-color: var(--color-bg);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 40px;
    transform: translateY(-100%);
    transition: transform 0.4s ease;
    z-index: 150;
  }

  .nav-links.open {
    transform: translateY(0);
  }

  .nav-links a {
    font-size: 1.5rem;
  }
}
/* ============================
   15. SECTION LABELS (instrument readout style)
   ============================ */
.section-label {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
}

.section-label .num {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--color-accent);
}

.section-label .line {
  flex: 1;
  max-width: 60px;
  height: 1px;
  background-color: var(--color-border);
}

.section-label .coord {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  text-transform: uppercase;
}

/* Refined typographic rhythm */
h2 { letter-spacing: -0.01em; }

.eyebrow {
  letter-spacing: 0.25em;
  font-weight: 500;
}

section h2 {
  margin-bottom: 8px;
}
/* ============================
   16. TOPOGRAPHIC LINE MOTIF
   ============================ */
.topo-lines {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  color: var(--color-accent);
  opacity: 0.15;
  z-index: 0;
}