.s4u-tools, .s4u-tools * { box-sizing: border-box; }
.s4u-tools { --s4u-accent:#0ea5a5; --s4u-accent-dark:#0b7f7f; }

.s4u-tools-grid{
  display:grid !important;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  align-items: stretch;
}

.s4u-tools-card{
  display:flex !important;
  flex-direction:column;
  text-decoration:none !important;
  border:1px solid rgba(15,23,42,0.10);
  border-radius:16px;
  overflow:hidden;
  background:#fff;
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
  min-height: 240px;
  color: inherit;
}
.s4u-tools-card:hover{
  transform: translateY(-2px);
  border-color: rgba(14,165,165,.55);
  box-shadow: 0 10px 26px rgba(2,6,23,0.10);
}
.s4u-tools-card-top{
  padding:18px;
  display:flex;
  justify-content:flex-start;
  align-items:center;
  background: linear-gradient(135deg, rgba(14,165,165,0.10), rgba(14,165,165,0.02));
}
.s4u-tools-icon{
  width:56px;height:56px;
  border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  color: var(--s4u-accent);
  background: rgba(14,165,165,0.12);
  border: 1px solid rgba(14,165,165,0.25);
}
.s4u-tools-thumb{
  width:56px;height:56px;
  object-fit:cover;
  border-radius:14px;
  border:1px solid rgba(14,165,165,0.25);
  background:#fff;
}
.s4u-tools-card-body{
  padding:16px 18px 18px 18px;
  display:flex;flex-direction:column;gap:8px;
  flex:1;
}
.s4u-tools-card-title{ font-weight:700; font-size:16px; line-height:1.2; color:#0f172a; }
.s4u-tools-card-desc{ font-size:14px; color:#475569; line-height:1.4; flex:1; }
.s4u-tools-card-cta{ margin-top:6px; font-weight:700; font-size:14px; color: var(--s4u-accent-dark); }

/* Tool UI */
.s4u-tools-tool{
  border:1px solid rgba(15,23,42,0.10);
  border-radius:16px;
  padding:18px;
  background:#fff;
}
.s4u-tools-title{ margin:0 0 6px 0; font-size:22px; }
.s4u-tools-desc{ margin:0 0 10px 0; color:#475569; }
.s4u-tools-privacy{ margin:0 0 14px 0; color:#475569; font-size:13px; }

.s4u-row{ display:flex; flex-wrap:wrap; gap:10px; align-items:center; margin: 10px 0; }
.s4u-col{ flex:1 1 240px; min-width: 240px; }
.s4u-input, .s4u-select{
  width:100%;
  padding:10px 12px;
  border:1px solid rgba(15,23,42,0.18);
  border-radius:12px;
  background:#fff;
}
.s4u-btn{
  appearance:none;
  border:0;
  border-radius:12px;
  padding:10px 14px;
  font-weight:700;
  cursor:pointer;
  background: var(--s4u-accent);
  color:#fff;
}
.s4u-btn:disabled{ opacity:.6; cursor:not-allowed; }
.s4u-btn-secondary{
  background: rgba(14,165,165,0.10);
  color: var(--s4u-accent-dark);
  border:1px solid rgba(14,165,165,0.30);
}
.s4u-note{ color:#475569; font-size:13px; margin:8px 0 0 0; }
.s4u-status{ margin-top:10px; font-size:13px; color:#0f172a; }
.s4u-chip{
  display:inline-flex; align-items:center; gap:8px;
  padding:8px 10px; border-radius:999px;
  border:1px solid rgba(15,23,42,0.14);
  background:#fff;
  font-size:13px;
}
.s4u-list{
  border:1px solid rgba(15,23,42,0.10);
  border-radius:12px;
  padding:10px;
  max-height:220px;
  overflow:auto;
  background:#fff;
}
.s4u-list-item{
  display:flex; align-items:center; justify-content:space-between;
  padding:8px 10px;
  border-radius:10px;
}
.s4u-list-item + .s4u-list-item{ border-top:1px solid rgba(15,23,42,0.06); }
.s4u-small{ font-size:12px; color:#64748b; }
.s4u-preview{ margin-top:10px; border:1px solid rgba(15,23,42,0.10); border-radius:12px; padding:10px; background:#fff; overflow:auto; }
.s4u-canvas{ max-width: 100%; height:auto; border-radius:10px; }