/* =========================================================
   Inter self-hosted — place inter.woff2 in assets/fonts/
   Download from: https://fontsource.org/fonts/inter
   ========================================================= */
@font-face {
  font-family: 'Inter';
  src: url('../assets/fonts/inter.woff2') format('woff2-variations');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

/* =========================================================
   Design tokens
   ========================================================= */
:root {
  --color-bg:        #0F3D58;
  --color-bg-raised: #164d6e;
  --color-accent:    #00C0F3;
  --color-accent-hover: #00a8d4;
  --color-text:      #ffffff;
  --color-text-muted: #B0C8D8;
  --color-border:    rgba(255, 255, 255, 0.12);
  --color-placeholder: rgba(255, 255, 255, 0.06);

  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  1.5rem;
  --space-lg:  2.5rem;
  --space-xl:  4rem;
  --space-2xl: 6rem;

  --radius-sm: 6px;
  --radius-md: 12px;

  --nav-height: 64px;
  --transition: 200ms ease;
}

/* =========================================================
   Reset
   ========================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

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

img { max-width: 100%; display: block; }

a { color: var(--color-accent); text-decoration: none; }
a:hover { color: var(--color-accent-hover); }

ul { list-style: none; }

/* =========================================================
   Skip link
   ========================================================= */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-sm);
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-accent);
  color: var(--color-bg);
  font-weight: 700;
  border-radius: var(--radius-sm);
  z-index: 9999;
  transition: top var(--transition);
}
.skip-link:focus { top: var(--space-xs); color: var(--color-bg); }

/* =========================================================
   Container
   ========================================================= */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* =========================================================
   Navigation
   ========================================================= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition);
}

.site-header.is-scrolled {
  background: rgba(15, 61, 88, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 1px 0 var(--color-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.nav__logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-accent);
  letter-spacing: 0.05em;
}
.nav__logo:hover { color: var(--color-accent-hover); }

.nav__links {
  display: flex;
  gap: var(--space-lg);
}

.nav__links a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: color var(--transition);
  position: relative;
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition);
}

.nav__links a:hover,
.nav__links a.is-active {
  color: var(--color-text);
}

.nav__links a.is-active::after { width: 100%; }

/* Hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: var(--space-xs);
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.hamburger-line {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav__hamburger[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav__hamburger[aria-expanded="true"] .hamburger-line:nth-child(2) {
  opacity: 0;
}
.nav__hamburger[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

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

/* =========================================================
   Sections
   ========================================================= */
.section {
  padding: var(--space-2xl) 0;
}

.section__title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 800;
  margin-bottom: var(--space-lg);
  position: relative;
}

.section__title::after {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  background: var(--color-accent);
  margin-top: var(--space-xs);
  border-radius: 2px;
}

.section__title--centered { text-align: center; }
.section__title--centered::after { margin: var(--space-xs) auto 0; }

/* =========================================================
   Hero
   ========================================================= */
.hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding-top: var(--nav-height);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(0, 192, 243, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero__inner { position: relative; z-index: 1; }

.hero__eyebrow {
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

.hero__name {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
}

.hero__tagline {
  font-size: clamp(0.95rem, 2.5vw, 1.15rem);
  font-weight: 400;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  margin-bottom: var(--space-lg);
}

.hero__cta {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
}

.hero__scroll-indicator {
  position: absolute;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
}

.hero__scroll-indicator span {
  display: block;
  width: 24px;
  height: 40px;
  border: 2px solid var(--color-border);
  border-radius: 12px;
  position: relative;
}

.hero__scroll-indicator span::before {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 2px;
  animation: scroll-dot 2s ease infinite;
}

@keyframes scroll-dot {
  0%   { opacity: 1; transform: translateX(-50%) translateY(0); }
  100% { opacity: 0; transform: translateX(-50%) translateY(14px); }
}

@media (prefers-reduced-motion: reduce) {
  .hero__scroll-indicator span::before { animation: none; }
}

/* =========================================================
   Buttons
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.75rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition);
  text-decoration: none;
}

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

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

.btn--outline {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}
.btn--outline:hover {
  background: rgba(0, 192, 243, 0.1);
  color: var(--color-accent);
}

/* =========================================================
   About
   ========================================================= */
.about {
  background: var(--color-bg-raised);
}

.about__inner {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-2xl);
  align-items: start;
}

.about__photo {
  position: relative;
}

.about__img {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius-md);
  object-fit: cover;
  border: 2px solid var(--color-border);
}

/* CSS avatar fallback when image is missing */
.about__photo--fallback::after {
  content: 'AM';
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  aspect-ratio: 1;
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-accent);
  letter-spacing: 0.05em;
}

.about__content p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
  line-height: 1.8;
}

.about__content p:last-child { margin-bottom: 0; }

.about__note {
  font-size: 0.8rem;
  opacity: 0.5;
}

/* =========================================================
   Experience / Timeline
   ========================================================= */
.timeline {
  position: relative;
  padding-left: var(--space-lg);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.timeline__item {
  position: relative;
  margin-bottom: var(--space-lg);
}

.timeline__marker {
  position: absolute;
  left: calc(-1 * var(--space-lg) + 2px);
  top: var(--space-sm);
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 2px solid var(--color-bg);
  transform: translateX(-50%);
}

.timeline__card {
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
}

.timeline__card--placeholder {
  background: var(--color-placeholder);
  border-style: dashed;
}

.timeline__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.timeline__role {
  font-size: 1.1rem;
  font-weight: 700;
}

.timeline__company {
  font-size: 0.9rem;
  color: var(--color-accent);
  font-weight: 500;
  margin-top: 2px;
}

.timeline__date {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  white-space: nowrap;
  background: var(--color-bg);
  padding: 2px 10px;
  border-radius: 20px;
  border: 1px solid var(--color-border);
  flex-shrink: 0;
}

.timeline__bullets {
  list-style: disc;
  padding-left: var(--space-sm);
  color: var(--color-text-muted);
}

.timeline__bullets li {
  margin-bottom: 0.35rem;
  line-height: 1.6;
}

/* Grouped company card (C Spire multi-role) */
.timeline__company-group-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--color-border);
}

.timeline__company-name {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--color-accent);
}

.timeline__company-roles {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.timeline__sub-role {
  padding-left: var(--space-sm);
  border-left: 2px solid var(--color-border);
}

.timeline__sub-role-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-sm);
  margin-bottom: 0.4rem;
  flex-wrap: wrap;
}

.timeline__sub-role-header h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
}

.timeline__date--sm {
  font-size: 0.75rem;
  padding: 1px 8px;
}

/* =========================================================
   Skills
   ========================================================= */
.skills {
  background: var(--color-bg-raised);
}

.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.skills__group {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

.skills__group-title {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--color-border);
}

.skills__list { display: flex; flex-direction: column; gap: var(--space-xs); }

.skills__item {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  padding: 4px 0;
  border-bottom: 1px solid var(--color-placeholder);
}

.skills__item:last-child { border-bottom: none; }
.skills__item--placeholder { opacity: 0.5; font-style: italic; }

.skills__item--cert {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 6px 0;
}

.cert__name {
  font-size: 0.88rem;
  color: var(--color-text);
  font-weight: 500;
}

.cert__issuer {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

/* =========================================================
   Contact
   ========================================================= */
.contact__inner {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.contact__sub {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  margin-bottom: var(--space-lg);
  line-height: 1.7;
}

.contact__links {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding: var(--space-md) 0;
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* =========================================================
   Mobile
   ========================================================= */
@media (max-width: 768px) {
  .nav__links {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 61, 88, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
  }

  .nav__links.is-open {
    display: flex;
  }

  .nav__links a {
    font-size: 1.25rem;
  }

  .nav__hamburger {
    display: flex;
  }

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

  .about__photo {
    max-width: 200px;
    margin: 0 auto;
  }

  .timeline__header {
    flex-direction: column;
  }

  .hero__scroll-indicator {
    display: none;
  }
}

/* =========================================================
   Focus styles (global)
   ========================================================= */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 2px;
}