/* ============================================================
   NAV.CSS — Top navigation bar + mobile drawer
============================================================ */

nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: 62px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-lg);
  background: rgba(255, 255, 255, 0.88);
  /* Frosted glass: blurs whatever is behind the nav */
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background var(--t);
}

/* Slightly more opaque once user scrolls */
nav.scrolled {
  background: rgba(255, 255, 255, 0.97);
}

/* ---- Logo ---- */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  transition: color var(--t);
}
.nav-logo:hover { color: var(--indigo); }

/*
  LOGO MARK — geometric placeholder using CSS.
  Replace the inner <span> with:
    <img src="assets/logo.svg" alt="Sellaris" width="30" height="30" />
  Recommended: SVG, 30×30px, works on both white and dark backgrounds.
  Free tools: Figma (figma.com), Vectr (vectr.com), Iconify (iconify.design)
*/
.logo-mark {
  width: 30px;
  height: 30px;
  background: var(--text-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0;
  flex-shrink: 0;
  transition: background var(--t);
}
.nav-logo:hover .logo-mark {
  background: var(--indigo);
}

/* ---- Desktop links ---- */
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color var(--t);
  position: relative;
}

/* Underline slide-in on hover */
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0;
  width: 0; height: 1px;
  background: var(--indigo);
  transition: width var(--t) var(--ease);
}
.nav-links a:hover {
  color: var(--text-primary);
}
.nav-links a:hover::after {
  width: 100%;
}

/* ---- GitHub CTA button ---- */
.nav-cta {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 16px;
  background: var(--text-primary);
  color: #fff;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 600;
  transition: background var(--t), transform var(--t);
}
.nav-cta:hover {
  background: var(--indigo);
  transform: translateY(-1px);
}

/* ---- Hamburger (mobile only) ---- */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  border-radius: var(--radius-sm);
}
.nav-hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.25s var(--ease);
}

/* X state when menu is open */
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---- Mobile drawer ---- */
.nav-mobile {
  display: none;
  position: fixed;
  top: 62px; left: 0; right: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 12px var(--space-lg) 20px;
  flex-direction: column;
  z-index: 99;
}
.nav-mobile.open { display: flex; }

.nav-mobile a {
  font-size: 0.95rem;
  color: var(--text-secondary);
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  transition: color var(--t);
}
.nav-mobile a:last-child { border-bottom: none; }
.nav-mobile a:hover { color: var(--indigo); }

/* ---- Responsive ---- */
@media (max-width: 720px) {
  .nav-links,
  .nav-cta { display: none; }
  .nav-hamburger { display: flex; }
}


/* ============================================================
   FOOTER.CSS — Dark footer
============================================================ */

footer {
  background: var(--footer-bg);
  border-top: 1px solid var(--footer-border);
  color: var(--footer-text);
  padding: 56px 0 36px;
}

/* Grid: brand column + 3 link columns */
.footer-top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--footer-border);
  margin-bottom: 28px;
}

/* ---- Brand column ---- */
.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  color: #fff;
  margin-bottom: 14px;
  transition: color var(--t);
}
.footer-logo:hover { color: var(--indigo); }

/* Logo mark reused but inverted for dark footer */
.footer-logo .logo-mark {
  background: #fff;
  color: var(--footer-bg);
}
.footer-logo:hover .logo-mark {
  background: var(--indigo);
  color: #fff;
}

.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--footer-text);
  max-width: 260px;
}

/* Slogan — indigo accent text */
.footer-slogan {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--indigo);
  margin-top: 14px;
  opacity: 0.9;
}

/* Social icon row */
.footer-socials {
  display: flex;
  gap: 10px;
  margin-top: 18px;
}
.footer-socials a {
  width: 32px;
  height: 32px;
  border: 1px solid var(--footer-border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--footer-muted);
  transition: border-color var(--t), color var(--t);
}
.footer-socials a:hover {
  border-color: var(--indigo);
  color: var(--indigo);
}
.footer-socials [data-feather] { width: 14px; height: 14px; }

/* ---- Link columns ---- */
.footer-col h4 {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #fff;
  margin-bottom: 14px;
}

.footer-col ul { display: flex; flex-direction: column; gap: 9px; }

.footer-col a {
  font-size: 0.875rem;
  color: var(--footer-text);
  transition: color var(--t);
}
.footer-col a:hover { color: #fff; }

/* ---- Bottom bar ---- */
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-credit {
  font-size: 0.8rem;
  color: var(--footer-muted);
}
.footer-credit a {
  color: var(--footer-text);
  transition: color var(--t);
}
.footer-credit a:hover { color: #fff; }

/* Project status pill */
.footer-status {
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--footer-muted);
}
.status-dot {
  width: 6px;
  height: 6px;
  background: #22c55e;
  border-radius: 50%;
  /* Gentle pulse to indicate "live/active" */
  animation: statusPulse 3s ease-in-out infinite;
}

@keyframes statusPulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}

/* ---- Responsive ---- */
@media (max-width: 860px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }
}

@media (max-width: 520px) {
  .footer-top {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}