* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, sans-serif; color: #0f172a; background: #fff; }

.back-portfolio {
  position: fixed;
  bottom: 1rem;
  left: 1rem;
  z-index: 9999;
  padding: 0.5rem 1rem;
  background: rgba(15, 23, 42, 0.92);
  color: #fff;
  text-decoration: none;
  font-size: 0.8125rem;
  font-weight: 700;
  border-radius: 999px;
}

.site { min-height: 100vh; display: flex; flex-direction: column; }

.hero {
  background: linear-gradient(145deg, #0f172a 0%, #1e1b4b 100%);
  color: #f8fafc;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.logo { font-weight: 800; margin-right: auto; }
.nav a { color: #cbd5e1; text-decoration: none; font-size: 0.9rem; }
.nav a:hover { color: #fff; }

.cta {
  border: none;
  background: #fff;
  color: #0f172a;
  font-weight: 600;
  padding: 0.45rem 1rem;
  border-radius: 999px;
  cursor: pointer;
}

.hero-inner { padding: 3rem 1.5rem; }
.hero-inner h1 {
  margin: 0;
  max-width: 16ch;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  letter-spacing: -0.03em;
  line-height: 1.15;
}
.hero-inner p { max-width: 44ch; margin: 1rem 0 0; color: #94a3b8; }

.services { padding: 2rem 1.5rem; }
.services h2 { margin: 0 0 1rem; }
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}
.grid article {
  padding: 1.15rem;
  background: #f8fafc;
  border-radius: 12px;
  border: 1px solid #e2e8f0;
}
.grid h3 { margin: 0 0 0.35rem; }
.grid p { margin: 0; font-size: 0.9rem; color: #64748b; }

.work { padding: 2rem 1.5rem; background: #f8fafc; }
.work h2 { margin: 0 0 0.5rem; }
.work-lead { margin: 0 0 1.25rem; font-size: 0.9rem; color: #64748b; max-width: 42ch; }
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; }
a.tile {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4/3;
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-end;
  gap: 0.35rem;
  padding: 1rem;
  color: #fde68a;
  font-weight: 700;
  text-decoration: none;
  box-sizing: border-box;
  background-size: cover;
  background-position: center;
  text-shadow:
    0 2px 16px rgba(0, 0, 0, 0.95),
    0 1px 3px rgba(0, 0, 0, 1);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
a.tile::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(2, 6, 23, 1) 0%,
    rgba(15, 23, 42, 0.94) 22%,
    rgba(15, 23, 42, 0.78) 48%,
    rgba(15, 23, 42, 0.45) 100%
  );
  z-index: 0;
  transition: opacity 0.2s ease;
}
a.tile:hover::before {
  opacity: 1;
}
a.tile > * {
  position: relative;
  z-index: 1;
}
a.tile:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.2);
}
a.tile:focus-visible {
  outline: 3px solid #fff;
  outline-offset: 3px;
}
.tile-hint {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: #c4b5fd;
  text-shadow:
    0 2px 12px rgba(0, 0, 0, 0.95),
    0 1px 2px rgba(0, 0, 0, 1);
  opacity: 1;
}
.t1 {
  background-color: #0f172a;
  background-image: url("https://images.unsplash.com/photo-1590283603385-17ffb3a7f29f?auto=format&fit=crop&w=1400&q=82");
}
.t2 {
  background-color: #0f172a;
  background-image: url("https://images.unsplash.com/photo-1576091160399-112ba8d25d1d?auto=format&fit=crop&w=1400&q=82");
}
.t3 {
  background-color: #0f172a;
  background-image: url("https://images.unsplash.com/photo-1551288049-bebda4e38f71?auto=format&fit=crop&w=1400&q=82");
}

.cases {
  padding: 2rem 1.5rem 3rem;
  background: #fff;
  border-top: 1px solid #e2e8f0;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.case {
  scroll-margin-top: 1.25rem;
  padding: 1.25rem;
  border-radius: 12px;
  border: 1px solid #e2e8f0;
  background: #f8fafc;
}
.case h3 { margin: 0 0 0.35rem; font-size: 1.2rem; color: #0f172a; }
.case-meta { margin: 0 0 0.75rem; font-size: 0.8rem; font-weight: 600; color: #6366f1; letter-spacing: 0.02em; }
.case p:last-of-type { margin: 0; color: #475569; line-height: 1.55; }
.case-back {
  display: inline-block;
  margin-top: 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: #6366f1;
  text-decoration: none;
}
.case-back:hover { text-decoration: underline; }

.foot { padding: 1.5rem; text-align: center; font-size: 0.85rem; color: #64748b; margin-top: auto; }

.demo-toast {
  position: fixed;
  bottom: 5rem;
  left: 50%;
  width: min(300px, calc(100% - 2rem));
  box-sizing: border-box;
  background: #0f172a;
  color: #f8fafc;
  padding: 0.65rem 1rem;
  border-radius: 12px;
  font-size: 0.875rem;
  text-align: center;
  z-index: 100000;
  opacity: 0;
  transform: translate(-50%, 12px);
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

.demo-toast--visible {
  opacity: 1;
  transform: translate(-50%, 0);
}