/* ============================================================
   AL SADAT BUILDERS — Construction & Property Tools
   Calculator UI. Layered on top of style.css and reusing its
   variables so the tools hub keeps the site's white/yellow look.
   Only loaded on /tools/ pages (../../css/tools.css).
   ============================================================ */

/* ---------- Tool hero ---------- */
.tool-hero {
  background: linear-gradient(135deg, var(--dark) 0%, #2D2D2D 100%);
  color: var(--white);
  padding: 56px 0 46px;
  position: relative;
  overflow: hidden;
}

.tool-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23F5C518' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.tool-hero .container { position: relative; z-index: 1; }

.tool-hero h1 {
  color: var(--white);
  margin-bottom: 14px;
  font-size: clamp(1.7rem, 4.2vw, 2.6rem);
}

.tool-hero p {
  color: rgba(255, 255, 255, 0.78);
  font-size: 1.02rem;
  max-width: 780px;
}

/* ---------- Breadcrumbs ---------- */
.tool-crumbs {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 18px;
}

.tool-crumbs a { color: var(--yellow); }
.tool-crumbs a:hover { color: var(--white); }
.tool-crumbs span { margin: 0 6px; opacity: 0.5; }

/* ---------- Calculator layout ---------- */
.calc-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.calc-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 26px 24px;
  box-shadow: var(--shadow);
}

.calc-card > h2 {
  font-size: 1.15rem;
  margin-bottom: 4px;
}

.calc-card > .calc-sub {
  font-size: 0.85rem;
  color: var(--gray);
  margin-bottom: 20px;
}

/* Inputs */
.calc-field { margin-bottom: 16px; }

.calc-field > label,
.calc-field-label {
  display: block;
  font-size: 0.83rem;
  font-weight: 600;
  color: var(--gray-dark);
  margin-bottom: 6px;
}

.calc-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 12px;
}

.calc-input-group {
  display: flex;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  background: var(--white);
  overflow: hidden;
  transition: var(--transition);
}

.calc-input-group:focus-within {
  border-color: var(--yellow-dark);
  box-shadow: 0 0 0 3px rgba(245, 197, 24, 0.18);
}

.calc-input-group input,
.calc-input-group select {
  border: none;
  outline: none;
  background: transparent;
  font-family: var(--font-main);
  font-size: 0.95rem;
  color: var(--dark);
  padding: 11px 13px;
  min-width: 0;
  width: 100%;
}

.calc-input-group select {
  background: var(--off-white);
  border-left: 1.5px solid var(--border);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-dark);
  cursor: pointer;
  width: auto;
  padding-right: 30px;
}

.calc-input-group input:focus,
.calc-input-group select:focus { outline: none; }

/* Standalone select (no attached number input) */
.calc-select {
  width: 100%;
  font-family: var(--font-main);
  font-size: 0.92rem;
  color: var(--dark);
  padding: 11px 13px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  background: var(--white);
  cursor: pointer;
  transition: var(--transition);
}

.calc-select:focus {
  outline: none;
  border-color: var(--yellow-dark);
  box-shadow: 0 0 0 3px rgba(245, 197, 24, 0.18);
}

.calc-hint {
  font-size: 0.76rem;
  color: var(--gray-light);
  margin-top: 5px;
  line-height: 1.5;
}

/* Checkbox / toggle rows */
.calc-check {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 0.88rem;
  color: var(--gray-dark);
  cursor: pointer;
  padding: 7px 0;
  line-height: 1.4;
}

.calc-check input {
  width: 17px;
  height: 17px;
  accent-color: var(--yellow-dark);
  flex-shrink: 0;
  cursor: pointer;
}

.calc-divider {
  height: 1px;
  background: var(--border);
  margin: 20px 0;
}

/* Unit suffix shown inside an input group when it is not a dropdown,
   e.g. "%" on a wastage field or "t/m³" on a density field. */
.calc-unit-suffix {
  display: flex;
  align-items: center;
  padding: 0 13px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--gray);
  background: var(--off-white);
  border-left: 1.5px solid var(--border);
  white-space: nowrap;
}

.calc-actions {
  display: flex;
  gap: 10px;
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.calc-actions .btn {
  padding: 10px 18px;
  font-size: 0.86rem;
  cursor: pointer;
  font-family: var(--font-main);
}

/* ---------- Results ---------- */
.calc-results {
  background: var(--off-white);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 22px;
  position: sticky;
  top: 16px;
}

.calc-results > h2 {
  font-size: 1.05rem;
  margin-bottom: 16px;
}

.result-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(128px, 1fr));
  gap: 12px;
  margin-bottom: 18px;
}

.result-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-left: 4px solid var(--yellow);
  border-radius: var(--radius);
  padding: 12px 14px;
}

.result-card.is-primary {
  background: var(--black);
  border-color: var(--black);
  border-left-color: var(--yellow);
  grid-column: 1 / -1;
}

.result-card .rc-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 3px;
}

.result-card .rc-value {
  display: block;
  font-size: 1.32rem;
  font-weight: 800;
  color: var(--black);
  line-height: 1.2;
  word-break: break-word;
}

.result-card .rc-unit {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--gray);
  margin-left: 3px;
}

.result-card.is-primary .rc-label { color: rgba(255, 255, 255, 0.6); }
.result-card.is-primary .rc-value { color: var(--yellow); font-size: 1.9rem; }
.result-card.is-primary .rc-unit { color: rgba(255, 255, 255, 0.75); }

.calc-note {
  font-size: 0.78rem;
  color: var(--gray);
  line-height: 1.6;
  border-top: 1px dashed var(--border);
  padding-top: 12px;
}

/* ---------- Tables ---------- */
.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 20px 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  min-width: 420px;
}

table.data-table caption {
  caption-side: top;
  text-align: left;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--gray);
  padding: 12px 14px 0;
}

table.data-table th,
table.data-table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

table.data-table th {
  background: var(--black);
  color: var(--white);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  white-space: nowrap;
}

table.data-table tbody tr:nth-child(even) { background: var(--off-white); }
table.data-table tbody tr:last-child td { border-bottom: none; }
table.data-table td strong { color: var(--black); font-weight: 700; }

/* ---------- Hub grid ---------- */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 16px;
}

.tool-card {
  display: block;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 18px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--yellow);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--yellow);
}

.tool-card:hover::before { transform: scaleX(1); }

.tool-card .tc-icon {
  font-size: 1.5rem;
  display: block;
  margin-bottom: 8px;
}

.tool-card h3 {
  font-size: 1rem;
  margin-bottom: 6px;
  line-height: 1.35;
}

.tool-card p {
  font-size: 0.83rem;
  color: var(--gray);
  line-height: 1.55;
  margin: 0;
}

.tool-card .tc-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  font-size: 0.66rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--yellow-light);
  color: var(--gray-dark);
  padding: 3px 8px;
  border-radius: 20px;
}

.tool-cat-block { margin-bottom: 52px; }
.tool-cat-block:last-child { margin-bottom: 0; }

.tool-cat-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
  scroll-margin-top: 90px;
}

.tool-cat-head h2 {
  font-size: clamp(1.25rem, 3vw, 1.6rem);
  margin: 0;
}

.tool-cat-desc {
  font-size: 0.92rem;
  color: var(--gray);
  margin-bottom: 22px;
  max-width: 760px;
}

/* ---------- Long-form content ---------- */
.tool-content {
  max-width: 880px;
}

.tool-content h2 {
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  margin: 40px 0 14px;
  scroll-margin-top: 90px;
}

.tool-content h2:first-child { margin-top: 0; }

.tool-content h3 {
  font-size: 1.08rem;
  margin: 26px 0 10px;
}

.tool-content p { margin-bottom: 14px; }

.tool-content ul,
.tool-content ol {
  margin: 0 0 16px 22px;
  color: var(--gray-dark);
}

.tool-content ul { list-style: disc; }
.tool-content ol { list-style: decimal; }

.tool-content li {
  margin-bottom: 8px;
  line-height: 1.75;
  padding-left: 4px;
}

.tool-content a { color: var(--yellow-dark); font-weight: 600; }
.tool-content a:hover { text-decoration: underline; }

.tool-content code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
  background: var(--off-white);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  color: var(--dark);
}

.formula-box {
  background: var(--off-white);
  border: 1px solid var(--border);
  border-left: 4px solid var(--yellow);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 16px 20px;
  margin: 18px 0;
  font-size: 0.95rem;
  color: var(--dark);
}

.formula-box strong { display: block; margin-bottom: 6px; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--gray); }

/* ---------- FAQ ---------- */
.tool-faq { margin-top: 12px; }

.tool-faq details {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 10px;
  background: var(--white);
  transition: var(--transition);
}

.tool-faq details[open] {
  border-color: var(--yellow);
  box-shadow: var(--shadow);
}

.tool-faq summary {
  cursor: pointer;
  padding: 15px 18px;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--black);
  list-style: none;
  position: relative;
  padding-right: 44px;
  line-height: 1.45;
}

.tool-faq summary::-webkit-details-marker { display: none; }

.tool-faq summary::after {
  content: '+';
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.35rem;
  font-weight: 400;
  color: var(--yellow-dark);
  line-height: 1;
}

.tool-faq details[open] summary::after { content: '−'; }

.tool-faq .faq-body {
  padding: 0 18px 16px;
  font-size: 0.92rem;
  color: var(--gray-dark);
  line-height: 1.8;
}

/* ---------- Related tools ---------- */
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 14px;
  margin-top: 20px;
}

.related-link {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  transition: var(--transition);
}

.related-link:hover {
  border-color: var(--yellow);
  transform: translateX(4px);
}

.related-link .rl-icon { font-size: 1.2rem; }

.related-link .rl-text {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--dark);
  line-height: 1.35;
}

/* ---------- Inline CTA ---------- */
.tool-cta {
  background: var(--black);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  margin: 44px 0 0;
  color: var(--white);
}

.tool-cta h3 { color: var(--white); margin: 0 0 8px; font-size: 1.25rem; }

.tool-cta p {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.92rem;
  margin-bottom: 18px;
  max-width: 640px;
}

.tool-cta-btns { display: flex; flex-wrap: wrap; gap: 12px; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .calc-layout { grid-template-columns: 1fr; gap: 22px; }
  .calc-results { position: static; }
  .tool-hero { padding: 42px 0 36px; }
  .tools-grid { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
  .tool-cat-block { margin-bottom: 42px; }
}

@media (max-width: 600px) {
  .calc-card { padding: 20px 16px; }
  .calc-results { padding: 20px 16px; }
  .calc-row { grid-template-columns: 1fr; }
  .tools-grid { grid-template-columns: 1fr; }
  .result-cards { grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); }
  .tool-cta { padding: 24px 18px; }
  .tool-cta-btns .btn { width: 100%; text-align: center; }
}

@media print {
  .top-bar, .header, .mobile-nav, .footer, .float-whatsapp,
  .tool-cta, .related-grid, .tool-crumbs { display: none !important; }
  .calc-layout { grid-template-columns: 1fr; }
  .calc-results { position: static; border-color: #999; }
}