/**
 * Seção Stack — Front-end e Mobile em blocos com grid de tecnologias
 */

.stack {
  position: relative;
  z-index: 1;
  width: 100%;
  overflow: hidden;
  background: #0a0a0a;
}

.stack__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(circle at center, rgba(37, 99, 235, 0.5) 0%, rgba(37, 99, 235, 0.22) 22%, rgba(37, 99, 235, 0.08) 40%, transparent 62%),
    radial-gradient(circle at center, rgba(255, 255, 255, 0.08) 0%, transparent 26%),
    linear-gradient(180deg, rgba(14, 36, 94, 0.96) 0%, rgba(24, 66, 166, 0.94) 48%, rgba(11, 28, 72, 0.97) 100%);
  background-attachment: fixed;
}

.stack__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: url("../img/bg-tech.jpg") center / cover no-repeat;
  background-attachment: fixed;
  opacity: 0.16;
  mix-blend-mode: screen;
}

.stack::before,
.stack::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  pointer-events: none;
  filter: blur(14px);
}

.stack::before {
  top: -120px;
  left: -120px;
  width: 320px;
  height: 320px;
  background: rgba(255, 255, 255, 0.06);
}

.stack::after {
  right: -140px;
  bottom: -120px;
  width: 280px;
  height: 280px;
  background: rgba(var(--primary-rgb), 0.14);
}

.stack__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  width: min(calc(100% - (var(--container-gutter) * 2)), var(--container-max));
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 80px 0 100px;
}

.stack__title {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 800;
  color: rgba(255, 255, 255, 0.8);
  text-align: center;
  margin: 0;
  letter-spacing: -0.02em;
}

.stack__block {
  padding: 24px;
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  background: rgba(10, 10, 10, 0.28);
  backdrop-filter: blur(8px);
  height: 100%;
}

.stack__block-head {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 8px;
}

.stack__block-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  border: 1px solid rgba(var(--primary-rgb), 0.24);
  background: linear-gradient(180deg, rgba(var(--primary-rgb), 0.18), rgba(255, 255, 255, 0.04));
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.18);
}

.stack__block-icon iconify-icon {
  font-size: 1.35rem;
  color: var(--light);
}

.stack__block-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--light);
  margin: 0;
  text-align: center;
}

.stack__block-desc {
  font-size: 0.95rem;
  color: var(--muted);
  text-align: center;
  margin: 0 0 18px 0;
}

@media (min-width: 768px) {
  .stack__block-head {
    justify-content: flex-start;
  }

  .stack__block-title {
    text-align: left;
  }

  .stack__block-desc {
    text-align: left;
  }
}

@media (min-width: 1024px) {
  .stack__inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .stack__title {
    grid-column: 1 / -1;
  }
}

.stack__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.stack__tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(10, 10, 10, 0.4);
  color: var(--light);
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}

.stack__tag iconify-icon {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.92);
  flex-shrink: 0;
}

.stack__tag:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.28);
  background: rgba(var(--primary-rgb), 0.18);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.18);
}

@media (min-width: 768px) {
  .stack__tags {
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  .stack__bg,
  .stack__bg::after {
    background-attachment: scroll;
  }

  .stack__block {
    padding: 20px 16px;
    backdrop-filter: none;
  }

  .stack__inner {
    padding: 56px 0 72px;
  }

  .stack__tags {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    justify-content: stretch;
  }

  .stack__tag {
    width: 100%;
    min-height: 44px;
    justify-content: flex-start;
    padding: 10px 12px;
    font-size: 0.85rem;
    line-height: 1.2;
    white-space: normal;
  }

  .stack__tag iconify-icon {
    font-size: 0.95rem;
  }
}

@media (max-width: 420px) {
  .stack__tags {
    grid-template-columns: 1fr;
  }
}