/* =========================================================
   Conversion Calculator – Final, Isolated Tool CSS
   NO global overrides.
   Namespaced under .conversion-tool and .seo-section
   Includes mobile polish, accessibility focus states & SEO spacing
   ========================================================= */

/* -----------------------
   Base variables + container
   ----------------------- */
.conversion-tool {
  --bg: #ffffff;
  --panel: #f9fafb;
  --border: #e5e7eb;
  --accent: #0f62fe;
  --accent-600: #004fde;
  --muted: #6b7280;
  --text: #111827;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,0.06);
  padding: 24px;
  border-radius: var(--radius);
  background: var(--bg);
  box-shadow: var(--shadow);
  box-sizing: border-box;
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* Title + subtitle */
.conversion-tool .tool-title {
  margin: 0 0 6px;
  font-size: 24px;
  font-weight: 700;
  line-height: 1.15;
}

.conversion-tool .tool-subtitle {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.5;
}

/* -----------------------
   Tabs
   ----------------------- */
.uc-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 18px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 6px;
}

.uc-tabs::-webkit-scrollbar { height: 8px; }
.uc-tabs::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.06); border-radius: 6px; }

.uc-tab {
  background: #f3f4f6;
  border: 1px solid var(--border);
  padding: 8px 14px;
  font-size: 14px;
  border-radius: 6px;
  cursor: pointer;
  color: #374151;
  transition: background 0.12s ease, transform 0.06s ease;
  white-space: nowrap;
  flex: 0 0 auto;
  box-sizing: border-box;
}

.uc-tab:hover { background: #e9ebee; transform: translateY(-1px); }
.uc-tab[aria-selected="true"] {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
  box-shadow: 0 4px 10px rgba(15,98,254,0.12);
}

/* -----------------------
   Grid layout
   ----------------------- */
.uc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 1000px) {
  .uc-grid { gap: 16px; }
}

@media (max-width: 800px) {
  .uc-grid { grid-template-columns: 1fr; }
}

/* Panels */
.uc-panel {
  background: var(--panel);
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 1px 2px rgba(16,24,40,0.02);
  box-sizing: border-box;
}

/* -----------------------
   Fields + selects
   ----------------------- */
.uc-field {
  display: flex;
  flex-direction: column;
  margin-bottom: 14px;
}

.uc-field label {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 6px;
}

.uc-field input,
.uc-field select {
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 15px;
  outline: none;
  background: white;
  box-sizing: border-box;
  color: var(--text);
}

.uc-field input::placeholder { color: #9aa0a6; }

.uc-field input:focus,
.uc-field select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(15, 98, 254, 0.08);
}

/* Select list (From / To lists) */
.uc-select-list {
  height: 180px;
  padding: 0;
  margin: 0;
  width: 100%;
  box-sizing: border-box;
  appearance: none;
}

.uc-select-list option {
  padding: 8px;
  font-size: 14px;
}

/* improve touch targets inside lists on mobile */
@media (max-width: 500px) {
  .uc-select-list { height: 160px; }
  .uc-select-list option { padding: 12px; font-size: 15px; }
}

/* -----------------------
   Buttons
   ----------------------- */
.uc-actions {
  display: flex;
  gap: 10px;
  margin: 14px 0;
}

.uc-btn {
  flex: 1;
  padding: 10px 12px;
  font-size: 14px;
  background: white;
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.12s ease, transform 0.06s ease;
  box-sizing: border-box;
}

.uc-btn:hover { background: #f3f4f6; transform: translateY(-1px); }

.uc-btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
  box-shadow: 0 6px 14px rgba(15,98,254,0.12);
}

.uc-btn-primary:hover { background: var(--accent-600); }

.uc-btn .icon { margin-right: 8px; vertical-align: middle; }

/* Swap button smaller on desktop (optional) */
#swapBtn { max-width: 140px; }

/* -----------------------
   Result box
   ----------------------- */
.uc-result-box {
  border: 1px solid var(--border);
  background: #f3f4f6;
  padding: 16px;
  border-radius: 8px;
  min-height: 72px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  box-sizing: border-box;
}

.uc-result-label {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
}

.uc-result {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.1;
  word-break: break-word;
  color: var(--text);
}

.uc-result-units {
  font-size: 13px;
  color: var(--muted);
  margin-top: 8px;
  word-break: break-word;
}

/* -----------------------
   Meta (precision + history)
   ----------------------- */
.uc-meta {
  display: flex;
  gap: 20px;
  margin-top: 18px;
  flex-wrap: wrap;
  align-items: flex-start;
}

.uc-meta select {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
}

/* History */
.uc-history-field { flex: 1; min-width: 180px; }

.uc-history {
  background: white;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px;
  font-size: 14px;
  max-height: 150px;
  overflow-y: auto;
  box-sizing: border-box;
}

.uc-history div {
  padding: 6px 4px;
  border-bottom: 1px solid #f0f0f0;
  cursor: default;
}

.uc-history div:last-child { border-bottom: none; }

@media (max-width: 500px) {
  .uc-history div { padding: 10px 6px; font-size: 15px; }
}

/* -----------------------
   Mobile focused improvements
   ----------------------- */
@media (max-width: 720px) {
  .conversion-tool { padding: 16px; border-radius: 12px; }
  .conversion-tool .tool-title { font-size: 20px; }
  .conversion-tool .tool-subtitle { font-size: 13px; }

  .uc-actions { flex-direction: column; gap: 8px; }
  .uc-btn { width: 100%; padding: 12px; font-size: 15px; }
  .uc-panel { padding: 14px; }
  .uc-select-list { height: 140px; }
  .uc-result-box { min-height: 64px; padding: 12px; }
  .uc-tab { padding: 8px 10px; font-size: 13px; }
  .uc-history { max-height: 120px; }
}

/* very small screens */
@media (max-width: 420px) {
  .conversion-tool { padding: 12px; }
  .conversion-tool .tool-title { font-size: 18px; }
  .conversion-tool .tool-subtitle { font-size: 13px; }
  .uc-select-list { height: 120px; }
  .uc-field input, .uc-field select { padding: 10px; font-size: 15px; }
  .uc-result { font-size: 20px; }
  .uc-meta { gap: 12px; }
}

/* -----------------------
   Accessibility / focus states
   ----------------------- */
.uc-btn:focus, .uc-field input:focus, .uc-field select:focus, .uc-tab:focus {
  outline: 3px solid rgba(15,98,254,0.14);
  outline-offset: 2px;
}

/* -----------------------
   SEO section styling (visual separation + readable typography)
   ----------------------- */
.seo-section {
  margin-top: 48px;
  padding-top: 8px;
  padding-bottom: 60px;
  line-height: 1.65;
  color: #334155;
  font-size: 15px;
  max-width: 980px;
  box-sizing: border-box;
}

.seo-section h2 {
  margin-top: 32px;
  margin-bottom: 12px;
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
}

.seo-section h3 {
  margin-top: 24px;
  margin-bottom: 10px;
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
}

.seo-section p,
.seo-section ul li {
  font-size: 15px;
  color: #475569;
  margin-bottom: 14px;
}

.seo-section ul {
  margin-left: 1.2rem;
  margin-bottom: 14px;
}

/* Tighten paragraphs on mobile */
@media (max-width: 720px) {
  .seo-section { padding-bottom: 36px; margin-top: 28px; font-size: 15px; }
  .seo-section h2 { font-size: 20px; }
  .seo-section h3 { font-size: 16px; }
}

/* -----------------------
   Small visual polish
   ----------------------- */
.uc-panel { box-shadow: 0 1px 2px rgba(16,24,40,0.03); }

@media (min-width:1100px){.tool-card .form-grid>label:nth-last-child(1){min-width:180px}}
.tool-card:hover,.tool-card:focus{transform:translateY(0) !important}