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

:root {
  /* Colors */
  --clr-bg:        #0d0f14;
  --clr-surface:   #141720;
  --clr-border:    #1e2230;
  --clr-accent:    #6c63ff;
  --clr-accent-lt: #8b85ff;
  --clr-text:      #e2e4ec;
  --clr-muted:     #7a7f95;
  --clr-white:     #ffffff;

  /* Typography */
  --font-sans: 'Inter', system-ui, sans-serif;
  --font-mono: 'Fira Code', 'Courier New', monospace;

  /* Spacing */
  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  1.5rem;
  --space-lg:  2.5rem;
  --space-xl:  4rem;
  --space-2xl: 7rem;

  /* Misc */
  --radius:    0.75rem;
  --radius-sm: 0.375rem;
  --transition: 0.2s ease;
  --max-w: 1100px;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; }
a { color: inherit; text-decoration: none; }

/* ── Utilities ───────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.section { padding-block: var(--space-2xl); }

.section__label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--clr-accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-xs);
}

.section__title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-lg);
}

.highlight { color: var(--clr-accent); }

.card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: var(--space-lg);
  transition: border-color var(--transition), transform var(--transition);
}
.card:hover { border-color: var(--clr-accent); transform: translateY(-3px); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
}
.btn:hover { transform: translateY(-2px); }
.btn--primary {
  background: var(--clr-accent);
  color: var(--clr-white);
}
.btn--primary:hover { background: var(--clr-accent-lt); }
.btn--ghost {
  background: transparent;
  color: var(--clr-text);
  border-color: var(--clr-border);
}
.btn--ghost:hover { border-color: var(--clr-accent); color: var(--clr-accent); }
.btn--large { padding: 0.85rem 2rem; font-size: 1rem; }

/* Animate-on-scroll */
[data-animate] { opacity: 0; transform: translateY(24px); transition: opacity 0.5s ease, transform 0.5s ease; }
[data-animate].visible { opacity: 1; transform: none; }

/* ── Header / Nav ────────────────────────────────────────────── */
.site-header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 100;
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition);
}
.site-header.scrolled {
  background: rgba(13, 15, 20, 0.9);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--clr-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.nav__logo {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.nav__logo span { color: var(--clr-accent); }

.nav__links {
  display: flex;
  list-style: none;
  gap: var(--space-lg);
}
.nav__links a {
  font-size: 0.9rem;
  color: var(--clr-muted);
  transition: color var(--transition);
}
.nav__links a:hover,
.nav__links a.active { color: var(--clr-text); }

.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--clr-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Hero ────────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 4rem;
}

.hero__inner {
  position: relative;
  z-index: 1;
  padding-block: var(--space-2xl);
}

.hero__tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--clr-muted);
  border: 1px solid var(--clr-border);
  border-radius: 999px;
  padding: 0.3rem 0.9rem;
  margin-bottom: var(--space-md);
}

.dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  background: #4ade80;
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}

.hero__title {
  font-size: clamp(2.5rem, 7vw, 5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-md);
}

.hero__subtitle {
  max-width: 520px;
  color: var(--clr-muted);
  font-size: 1.1rem;
  margin-bottom: var(--space-lg);
}

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

.hero__bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--clr-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--clr-border) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 60% 40%, black 30%, transparent 100%);
  opacity: 0.35;
}

/* ── About ───────────────────────────────────────────────────── */
.about__cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
}

.card__avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--clr-accent);
  color: var(--clr-white);
  font-weight: 700;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-sm);
}

.about__card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.2rem;
}

.card__role {
  font-size: 0.85rem;
  color: var(--clr-accent);
  font-family: var(--font-mono);
  margin-bottom: var(--space-sm);
}

.card__skills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: var(--space-sm);
}
.card__skills span {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  background: var(--clr-bg);
  border: 1px solid var(--clr-border);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  color: var(--clr-muted);
}

/* ── Portfolio ───────────────────────────────────────────────── */
.portfolio__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-md);
}

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

.project-card__type {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--clr-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.project-card__links {
  display: flex;
  gap: 0.6rem;
}
.project-card__links a {
  color: var(--clr-muted);
  transition: color var(--transition);
}
.project-card__links a:hover { color: var(--clr-accent); }

.project-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.project-card__tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: var(--space-sm);
}
.project-card__tech span {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  background: var(--clr-bg);
  border: 1px solid var(--clr-border);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  color: var(--clr-muted);
}

/* ── Work / Timeline ─────────────────────────────────────────── */
.timeline {
  position: relative;
  padding-left: 2rem;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--clr-border);
}

.timeline__item {
  position: relative;
  padding-bottom: var(--space-md);
}
.timeline__item:last-child { padding-bottom: 0; }

.timeline__dot {
  position: absolute;
  left: -2.45rem;
  top: 1.4rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--clr-accent);
  border: 2px solid var(--clr-bg);
  box-shadow: 0 0 0 3px var(--clr-border);
}

.timeline__date {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--clr-accent);
  display: block;
  margin-bottom: 0.4rem;
}

.timeline__content h3 { font-size: 1.05rem; margin-bottom: 0.25rem; }

.timeline__company {
  font-size: 0.85rem;
  color: var(--clr-muted);
  margin-bottom: 0.5rem;
}

/* ── Blog ────────────────────────────────────────────────────── */
.blog__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.blog-card__meta {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: var(--space-sm);
}

.blog-card__date {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--clr-muted);
}

.blog-card__tag {
  font-size: 0.72rem;
  background: rgba(108, 99, 255, 0.15);
  color: var(--clr-accent-lt);
  border: 1px solid rgba(108, 99, 255, 0.3);
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
}

.blog-card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
  line-height: 1.4;
}
.blog-card h3 a:hover { color: var(--clr-accent-lt); }

.blog-card p { color: var(--clr-muted); font-size: 0.9rem; margin-bottom: var(--space-sm); }

.blog-card__read-more {
  font-size: 0.85rem;
  color: var(--clr-accent);
  transition: color var(--transition);
}
.blog-card__read-more:hover { color: var(--clr-accent-lt); }
.blog-card__read-more--disabled { color: var(--clr-muted); cursor: default; }

.blog__more { text-align: center; }

/* ── Contact ─────────────────────────────────────────────────── */
.contact__inner { text-align: center; max-width: 600px; margin-inline: auto; }
.contact__lead {
  color: var(--clr-muted);
  margin-bottom: var(--space-lg);
  font-size: 1.05rem;
}

.contact__socials {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}
.contact__socials a {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--clr-muted);
  font-size: 0.9rem;
  transition: color var(--transition);
}
.contact__socials a:hover { color: var(--clr-accent); }

/* ── Footer ──────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--clr-border);
  padding-block: var(--space-md);
}
.site-footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
  font-size: 0.85rem;
  color: var(--clr-muted);
}

.back-to-top {
  transition: color var(--transition);
}
.back-to-top:hover { color: var(--clr-accent); }

/* ── Blog pages ──────────────────────────────────────────────── */
.blog-page { padding-top: 6rem; }

.blog-page__header {
  border-bottom: 1px solid var(--clr-border);
  padding-bottom: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.blog-page .post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
  margin-bottom: var(--space-sm);
}

.blog-page__list { list-style: none; }
.blog-page__list li { border-bottom: 1px solid var(--clr-border); padding-block: var(--space-md); }
.blog-page__list li:last-child { border-bottom: none; }
.blog-page__list h3 { font-size: 1.1rem; margin-bottom: 0.3rem; }
.blog-page__list h3 a:hover { color: var(--clr-accent-lt); }
.blog-page__list p { color: var(--clr-muted); font-size: 0.9rem; }

.post-content {
  max-width: 680px;
  margin-inline: auto;
}
.post-content h2 { font-size: 1.4rem; margin-block: var(--space-lg) var(--space-sm); }
.post-content p { color: var(--clr-muted); margin-bottom: var(--space-sm); }
.post-content ul, .post-content ol { padding-left: 1.5rem; color: var(--clr-muted); margin-bottom: var(--space-sm); }
.post-content li { margin-bottom: 0.3rem; }
.post-content code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
  color: var(--clr-accent-lt);
}
.post-content pre {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: var(--space-md);
  overflow-x: auto;
  margin-bottom: var(--space-md);
}
.post-content pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.9rem;
}

.post-nav {
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--clr-border);
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav__toggle { display: flex; }
  .nav__links {
    display: none;
    position: fixed;
    inset: 4rem 0 0;
    background: var(--clr-bg);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
    z-index: 99;
  }
  .nav__links.open { display: flex; }
  .nav__links a { font-size: 1.2rem; }

  .timeline { padding-left: 1.2rem; }
  .timeline__dot { left: -1.65rem; }
}

@media (max-width: 480px) {
  .hero__title { font-size: 2.2rem; }
  .section__title { font-size: 1.7rem; }
  .about__cards, .portfolio__grid, .blog__grid { grid-template-columns: 1fr; }
}