/* ---------- Design tokens ---------- */
:root {
  --color-bg: #0f1115;
  --color-bg-alt: #171a21;
  --color-surface: #1d212b;
  --color-border: #2a2f3a;
  --color-text: #e8e9ec;
  --color-text-dim: #a3a8b4;
  --color-accent: #dc8100;
  --color-accent-soft: #f2a83d;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --max-width: 960px;
  --radius: 10px;
  --transition-fast: 0.18s ease;
  --transition-slow: 0.6s ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

main {
  display: block;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 5rem;
}

a {
  color: var(--color-accent-soft);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

h1, h2, h3 {
  line-height: 1.2;
  font-weight: 700;
}

.section-title {
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}

.placeholder {
  color: var(--color-text-dim);
  font-style: italic;
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(15, 17, 21, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.nav {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
}

.nav-brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-text);
  letter-spacing: 0.02em;
}

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

.nav-links {
  display: flex;
  gap: 1.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  position: relative;
  color: var(--color-text-dim);
  padding-bottom: 0.2rem;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 0;
  height: 2px;
  background: var(--color-accent);
  transition: right var(--transition-fast);
}

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

.nav-links a:hover::after,
.nav-links a[aria-current="page"]::after {
  right: 0;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  color: var(--color-text);
  font-size: 1.1rem;
  padding: 0.4rem 0.6rem;
  cursor: pointer;
}

@media (max-width: 640px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-fast);
  }

  .nav-links.is-open {
    max-height: 300px;
  }

  .nav-links a {
    display: block;
    padding: 0.9rem 1.5rem;
  }
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--color-text-dim);
  font-size: 0.9rem;
}

.site-footer a {
  color: var(--color-text-dim);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 1.25rem;
  list-style: none;
  margin: 0 0 0.75rem;
  padding: 0;
}

/* ---------- Hero (CSS-animated, no video yet) ---------- */
.hero {
  position: relative;
  overflow: hidden;
  min-height: 60vh;
  display: flex;
  align-items: center;
  padding: 4rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

/*
 * Dynamic hero background. No real hero footage/photo yet, so this uses a
 * slow-shifting animated gradient. To swap in a real video later, replace
 * .hero-bg with:
 *   <video class="hero-bg-video" autoplay muted loop playsinline poster="assets/img/hero-poster.jpg">
 *     <source src="assets/video/hero-bg.mp4" type="video/mp4">
 *   </video>
 * and keep .hero-bg as the reduced-motion / no-JS fallback layer.
 */
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(120deg, #1a1030, #0f1115, #2a1400, #0f1115);
  background-size: 300% 300%;
  animation: hero-gradient 18s ease infinite;
}

@keyframes hero-gradient {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  margin: 0 0 0.75rem;
  animation: hero-fade-up 0.8s ease both;
}

.hero p {
  font-size: 1.15rem;
  color: var(--color-text-dim);
  max-width: 40ch;
  margin: 0 0 1.75rem;
  animation: hero-fade-up 0.8s 0.15s ease both;
}

.hero .cta-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  animation: hero-fade-up 0.8s 0.3s ease both;
}

@keyframes hero-fade-up {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.btn {
  display: inline-block;
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-accent);
  color: var(--color-text);
  font-weight: 600;
  transition: transform var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
}

.btn:hover {
  background: var(--color-accent);
  color: #14100a;
  transform: translateY(-2px);
}

.btn.btn-ghost {
  border-color: var(--color-border);
}

.btn.btn-ghost:hover {
  background: var(--color-surface);
  color: var(--color-text);
}

/* ---------- Cards (portfolio / blog) ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
  box-shadow: 0 12px 24px -12px rgba(0, 0, 0, 0.6);
}

.card h3 {
  margin-top: 0;
}

.card .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.75rem;
}

.tag {
  font-size: 0.75rem;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  color: var(--color-text-dim);
}

/* ---------- Scroll reveal ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* ---------- Misc content ---------- */
.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--color-border);
}

.timeline li {
  position: relative;
  padding: 0 0 1.5rem 1.5rem;
}

.timeline li::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 4px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-accent);
}

/* Experience timeline with company monogram badges instead of dots */
.timeline.timeline--logos {
  border-left: none;
}

.timeline.timeline--logos li {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding-left: 0;
}

.timeline.timeline--logos li::before {
  content: none;
}

.exp-logo {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  object-fit: contain;
  object-position: left center;
}

/* ---------- Portfolio card icons ---------- */
.card-icon {
  width: 28px;
  height: 28px;
  margin-bottom: 0.75rem;
  color: var(--color-accent-soft);
}

/* ---------- Social links (Contact page) ---------- */
.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1rem;
  padding: 0;
  list-style: none;
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.4rem 1.1rem 0.4rem 0.4rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  color: var(--color-text);
  font-weight: 600;
  transition: transform var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

.social-link:hover,
.social-link:focus-visible {
  transform: translateY(-2px);
  border-color: var(--color-accent);
  background: var(--color-surface);
  color: var(--color-text);
}

.social-badge {
  width: 32px;
  height: 32px;
  object-fit: contain;
  flex-shrink: 0;
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}