/* Shared layout lives in style.css for consistency. */
/* Home page emphasis: announcements and academic tools. */
.tools-focus {
  background: linear-gradient(180deg, #f8fbfa, #eef5f2);
}

.tools-home-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(320px, .75fr);
  gap: 22px;
  margin-top: 30px;
  align-items: stretch;
}

.structural-highlight {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, .7fr);
  gap: 24px;
  padding: 28px;
  overflow: hidden;
  background: linear-gradient(135deg, #ffffff, #edf6f2);
}

.structural-highlight h3 {
  margin: 14px 0 12px;
  color: var(--primary);
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.05;
}

.structural-highlight p {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 16px;
}

.structure-mini-diagram {
  position: relative;
  min-height: 260px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(#f9fcfb 1px, transparent 1px), linear-gradient(90deg, #f9fcfb 1px, transparent 1px), #fff;
  background-size: 28px 28px;
}

.structure-mini-diagram .beam {
  position: absolute;
  left: 12%;
  right: 12%;
  top: 42%;
  height: 8px;
  border-radius: 999px;
  background: var(--primary);
}

.structure-mini-diagram .support {
  position: absolute;
  top: 47%;
  width: 0;
  height: 0;
  border-left: 18px solid transparent;
  border-right: 18px solid transparent;
  border-bottom: 34px solid var(--gold);
  filter: drop-shadow(0 3px 0 rgba(15, 77, 58, .22));
}

.structure-mini-diagram .support.left { left: 13%; }
.structure-mini-diagram .support.right { right: 13%; }

.structure-mini-diagram .load {
  position: absolute;
  top: 17%;
  width: 4px;
  height: 64px;
  border-radius: 999px;
  background: #d67a00;
}

.structure-mini-diagram .load:after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -1px;
  transform: translateX(-50%);
  border-left: 9px solid transparent;
  border-right: 9px solid transparent;
  border-top: 16px solid #d67a00;
}

.structure-mini-diagram .load.l1 { left: 44%; }
.structure-mini-diagram .load.l2 { left: 58%; }

.structure-mini-diagram .moment-line {
  position: absolute;
  left: 14%;
  right: 14%;
  bottom: 22%;
  height: 58px;
  border-bottom: 4px solid #d40000;
  border-radius: 0 0 50% 50%;
}

.tool-mini-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.tool-mini {
  padding: 18px;
}

.tool-mini span {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 8px;
  background: var(--soft);
  color: var(--primary);
  font-weight: 900;
}

.tool-mini strong {
  display: block;
  margin: 14px 0 6px;
  color: var(--primary);
  font-size: 18px;
}

.tool-mini p {
  margin: 0;
  color: var(--muted);
}

.featured-quick {
  border-color: rgba(217, 197, 41, .65);
  background: linear-gradient(180deg, #fff, #fffbea);
}

@media (max-width: 980px) {
  .tools-home-grid, .structural-highlight {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .tool-mini-grid {
    grid-template-columns: 1fr;
  }

  .structural-highlight {
    padding: 20px;
  }
}