/* ==========================================================================
   Which Aluminum Alloy Is Best for CNC Machining — Goldcattle Hub
   Scope: .gc-aluselect only. Zero global leakage.
   ========================================================================== */

html { overflow-x: hidden; }

.gc-aluselect {
  --alu-blue: #0052cc;
  --alu-blue-600: #003d99;
  --alu-navy: #0f2747;
  --alu-silver: #e8eaed;
  --alu-metal: #c5c9d0;
  --alu-metal-dark: #9aa0a6;
  --alu-dark: #1a1d23;
  --alu-text: #1f2329;
  --alu-muted: #5f6368;
  --alu-white: #ffffff;
  --alu-bg: #f8f9fa;
  --alu-card: #ffffff;
  --alu-border: #dadce0;
  --alu-amber: #e07b12;
  --alu-green: #188038;

  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--alu-text);
  line-height: 1.65;
  background: var(--alu-white);
}

.gc-aluselect * { box-sizing: border-box; }

.gc-aluselect img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* --------------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------------- */
.gc-aluselect .alu-container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.gc-aluselect .alu-section {
  padding: 72px 0;
}

.gc-aluselect .alu-section--silver { background: var(--alu-bg); }
.gc-aluselect .alu-section--metal { background: linear-gradient(180deg, var(--alu-silver) 0%, var(--alu-white) 100%); }
.gc-aluselect .alu-section--navy { background: var(--alu-navy); color: var(--alu-white); }
.gc-aluselect .alu-section--dark { background: var(--alu-dark); color: var(--alu-white); }

.gc-aluselect .alu-eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--alu-blue);
  margin-bottom: 12px;
}

.gc-aluselect .alu-section--navy .alu-eyebrow,
.gc-aluselect .alu-section--dark .alu-eyebrow { color: #7ab7ff; }

.gc-aluselect .alu-h2 {
  font-size: clamp(26px, 3.2vw, 36px);
  line-height: 1.18;
  font-weight: 800;
  color: var(--alu-navy);
  margin: 0 0 18px;
}

.gc-aluselect .alu-section--navy .alu-h2,
.gc-aluselect .alu-section--dark .alu-h2 { color: var(--alu-white); }

.gc-aluselect .alu-lead {
  font-size: 17px;
  color: var(--alu-muted);
  max-width: 760px;
  margin: 0 0 28px;
}

.gc-aluselect .alu-section--navy .alu-lead,
.gc-aluselect .alu-section--dark .alu-lead { color: #b8c0cc; }

.gc-aluselect .alu-h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--alu-navy);
  margin: 0 0 10px;
}

.gc-aluselect .alu-section--navy .alu-h3,
.gc-aluselect .alu-section--dark .alu-h3 { color: var(--alu-white); }

.gc-aluselect .alu-h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--alu-navy);
  margin: 0 0 8px;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.gc-aluselect .alu-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  border: 0;
  transition: transform .12s ease, box-shadow .12s ease, background .12s ease;
}

.gc-aluselect .alu-btn:hover { transform: translateY(-1px); }

.gc-aluselect .alu-btn--primary {
  background: var(--alu-blue);
  color: var(--alu-white);
  box-shadow: 0 4px 14px rgba(0,82,204,.28);
}

.gc-aluselect .alu-btn--primary:hover { background: var(--alu-blue-600); }

.gc-aluselect .alu-btn--secondary {
  background: var(--alu-white);
  color: var(--alu-blue);
  border: 2px solid var(--alu-blue);
}

.gc-aluselect .alu-btn--ghost {
  background: rgba(255,255,255,.1);
  color: var(--alu-white);
  border: 1px solid rgba(255,255,255,.35);
}

/* --------------------------------------------------------------------------
   Hero — full-bleed metallic split
   -------------------------------------------------------------------------- */
.gc-aluselect .alu-hero {
  position: relative;
  width: 100vw;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  background: linear-gradient(105deg, var(--alu-navy) 0%, #1b2d4a 52%, #3a4f6d 100%);
  color: var(--alu-white);
  overflow: hidden;
}

.gc-aluselect .alu-hero__grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  min-height: 560px;
  align-items: center;
}

.gc-aluselect .alu-hero__content {
  padding: 72px 24px 72px calc((100vw - 1200px) / 2 + 24px);
  position: relative;
  z-index: 2;
}

.gc-aluselect .alu-hero__eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: #7ab7ff;
  margin-bottom: 14px;
}

.gc-aluselect .alu-hero__title {
  font-size: clamp(32px, 4.2vw, 52px);
  line-height: 1.1;
  font-weight: 900;
  color: var(--alu-white);
  margin: 0 0 18px;
  text-shadow: 0 2px 16px rgba(0,0,0,.25);
}

.gc-aluselect .alu-hero__sub {
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.6;
  color: rgba(255,255,255,.88);
  margin: 0 0 28px;
  max-width: 560px;
  text-shadow: 0 1px 8px rgba(0,0,0,.2);
}

.gc-aluselect .alu-hero__actions { display: flex; gap: 14px; flex-wrap: wrap; }

.gc-aluselect .alu-hero__media {
  position: relative;
  height: 100%;
  min-height: 560px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  background: radial-gradient(circle at 70% 50%, rgba(255,255,255,.08) 0%, transparent 55%);
}

.gc-aluselect .alu-hero__media img {
  width: 100%;
  max-width: 640px;
  height: auto;
  object-fit: contain;
  filter: drop-shadow(0 24px 48px rgba(0,0,0,.35));
}

.gc-aluselect .alu-hero__metal-sheen {
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(255,255,255,0) 30%, rgba(255,255,255,.06) 48%, rgba(255,255,255,0) 66%);
  pointer-events: none;
}

/* --------------------------------------------------------------------------
   Quick answer bar
   -------------------------------------------------------------------------- */
.gc-aluselect .alu-quickbar {
  position: relative;
  z-index: 3;
  margin-top: -48px;
  padding: 0 24px;
}

.gc-aluselect .alu-quickbar__card {
  background: var(--alu-card);
  border-radius: 14px;
  box-shadow: 0 16px 40px rgba(15,39,71,.12);
  padding: 32px;
  border: 1px solid var(--alu-border);
}

.gc-aluselect .alu-quickbar__title {
  font-size: 18px;
  font-weight: 800;
  color: var(--alu-navy);
  margin: 0 0 18px;
}

.gc-aluselect .alu-quick-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

.gc-aluselect .alu-quick-table th,
.gc-aluselect .alu-quick-table td {
  padding: 13px 16px;
  text-align: left;
  border-bottom: 1px solid var(--alu-border);
}

.gc-aluselect .alu-quick-table th {
  background: var(--alu-navy);
  color: var(--alu-white);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .03em;
  text-transform: uppercase;
}

.gc-aluselect .alu-quick-table tr:last-child td { border-bottom: 0; }

.gc-aluselect .alu-quick-table td:first-child { color: var(--alu-muted); }

.gc-aluselect .alu-quick-table strong {
  color: var(--alu-navy);
  font-weight: 800;
}

/* --------------------------------------------------------------------------
   Tables
   -------------------------------------------------------------------------- */
.gc-aluselect .alu-table-wrap { overflow-x: auto; border-radius: 10px; border: 1px solid var(--alu-border); }

.gc-aluselect .alu-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--alu-card);
  font-size: 15px;
}

.gc-aluselect .alu-table th,
.gc-aluselect .alu-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--alu-border);
  vertical-align: top;
}

.gc-aluselect .alu-table th {
  background: var(--alu-silver);
  color: var(--alu-navy);
  font-weight: 800;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .04em;
}

.gc-aluselect .alu-table tbody tr:nth-child(even) { background: #f8f9fa; }

.gc-aluselect .alu-table td strong { color: var(--alu-navy); }

.gc-aluselect .alu-table .alu-num { font-variant-numeric: tabular-nums; }

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */
.gc-aluselect .alu-grid {
  display: grid;
  gap: 22px;
}

.gc-aluselect .alu-grid--2 { grid-template-columns: repeat(2, 1fr); }
.gc-aluselect .alu-grid--3 { grid-template-columns: repeat(3, 1fr); }
.gc-aluselect .alu-grid--4 { grid-template-columns: repeat(4, 1fr); }

.gc-aluselect .alu-card {
  background: var(--alu-card);
  border: 1px solid var(--alu-border);
  border-radius: 12px;
  padding: 26px;
  box-shadow: 0 4px 14px rgba(15,39,71,.05);
}

.gc-aluselect .alu-card--featured {
  border-color: var(--alu-blue);
  box-shadow: 0 6px 20px rgba(0,82,204,.1);
}

.gc-aluselect .alu-card__icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--alu-silver);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 14px;
}

.gc-aluselect .alu-card__title {
  font-size: 17px;
  font-weight: 800;
  color: var(--alu-navy);
  margin: 0 0 8px;
}

.gc-aluselect .alu-card__text {
  font-size: 14px;
  color: var(--alu-muted);
  margin: 0;
  line-height: 1.6;
}

.gc-aluselect .alu-card__alloy {
  display: inline-block;
  font-size: 13px;
  font-weight: 800;
  color: var(--alu-blue);
  text-transform: uppercase;
  letter-spacing: .04em;
  margin-bottom: 8px;
}

/* --------------------------------------------------------------------------
   Decision tree
   -------------------------------------------------------------------------- */
.gc-aluselect .alu-decision {
  display: flex;
  flex-direction: column;
  gap: 18px;
  max-width: 720px;
  margin: 0 auto;
}

.gc-aluselect .alu-decision__node {
  position: relative;
  background: var(--alu-card);
  border: 2px solid var(--alu-border);
  border-radius: 12px;
  padding: 20px 24px;
  text-align: center;
  font-weight: 700;
  color: var(--alu-navy);
}

.gc-aluselect .alu-decision__node--start {
  background: var(--alu-navy);
  color: var(--alu-white);
  border-color: var(--alu-navy);
}

.gc-aluselect .alu-decision__node--end {
  background: var(--alu-blue);
  color: var(--alu-white);
  border-color: var(--alu-blue);
}

.gc-aluselect .alu-decision__arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--alu-metal-dark);
  font-size: 22px;
  height: 24px;
}

.gc-aluselect .alu-decision__split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.gc-aluselect .alu-decision__label {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--alu-muted);
  margin-bottom: 6px;
}

/* --------------------------------------------------------------------------
   Process steps
   -------------------------------------------------------------------------- */
.gc-aluselect .alu-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
}

.gc-aluselect .alu-step {
  text-align: center;
  position: relative;
}

.gc-aluselect .alu-step__num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--alu-blue);
  color: var(--alu-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 800;
  margin: 0 auto 10px;
}

.gc-aluselect .alu-step__title {
  font-size: 14px;
  font-weight: 700;
  color: var(--alu-navy);
  margin: 0 0 4px;
}

.gc-aluselect .alu-step__desc {
  font-size: 13px;
  color: var(--alu-muted);
  margin: 0;
  line-height: 1.5;
}

/* --------------------------------------------------------------------------
   Split section
   -------------------------------------------------------------------------- */
.gc-aluselect .alu-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.gc-aluselect .alu-split__media img {
  border-radius: 12px;
  box-shadow: 0 16px 40px rgba(15,39,71,.12);
}

.gc-aluselect .alu-split__body > * + * { margin-top: 16px; }

/* --------------------------------------------------------------------------
   FAQ
   -------------------------------------------------------------------------- */
.gc-aluselect .alu-faq {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.gc-aluselect .alu-faq__item {
  background: var(--alu-card);
  border: 1px solid var(--alu-border);
  border-radius: 10px;
  overflow: hidden;
}

.gc-aluselect .alu-faq__q {
  width: 100%;
  padding: 18px 22px;
  background: none;
  border: 0;
  text-align: left;
  font-size: 16px;
  font-weight: 700;
  color: var(--alu-navy);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.gc-aluselect .alu-faq__icon {
  width: 22px;
  height: 22px;
  flex: 0 0 22px;
  color: var(--alu-blue);
  transition: transform .2s ease;
}

.gc-aluselect .alu-faq__item.is-open .alu-faq__icon { transform: rotate(180deg); }

.gc-aluselect .alu-faq__a {
  padding: 0 22px 18px;
  font-size: 15px;
  color: var(--alu-muted);
  display: none;
}

.gc-aluselect .alu-faq__item.is-open .alu-faq__a { display: block; }

/* --------------------------------------------------------------------------
   CTA banner
   -------------------------------------------------------------------------- */
.gc-aluselect .alu-cta {
  width: 100vw;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  background: var(--alu-navy);
  color: var(--alu-white);
  padding: 64px 0;
}

.gc-aluselect .alu-cta__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  align-items: center;
}

.gc-aluselect .alu-cta__title {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 900;
  margin: 0 0 14px;
  color: var(--alu-white);
}

.gc-aluselect .alu-cta__desc {
  font-size: 16px;
  color: #b8c0cc;
  margin: 0 0 22px;
  max-width: 620px;
}

.gc-aluselect .alu-cta__files {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

.gc-aluselect .alu-cta__file {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: #2cac5e;
  background: rgba(44,172,94,.12);
  padding: 6px 12px;
  border-radius: 4px;
}

.gc-aluselect .alu-cta__actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* --------------------------------------------------------------------------
   Case studies
   -------------------------------------------------------------------------- */
.gc-aluselect .alu-case {
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: 32px;
  background: var(--alu-card);
  border: 1px solid var(--alu-border);
  border-radius: 14px;
  overflow: hidden;
}

.gc-aluselect .alu-case__media { background: var(--alu-bg); }

.gc-aluselect .alu-case__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.gc-aluselect .alu-case__body { padding: 30px; }

.gc-aluselect .alu-case__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 0;
}

.gc-aluselect .alu-case__tag {
  font-size: 12px;
  font-weight: 700;
  color: var(--alu-muted);
  background: var(--alu-bg);
  padding: 5px 10px;
  border-radius: 4px;
}

.gc-aluselect .alu-case__tag--blue {
  color: var(--alu-blue);
  background: rgba(0,82,204,.08);
}

/* --------------------------------------------------------------------------
   Capability table
   -------------------------------------------------------------------------- */
.gc-aluselect .alu-capability td:first-child {
  font-weight: 700;
  color: var(--alu-navy);
  width: 32%;
}

/* --------------------------------------------------------------------------
   Lists
   -------------------------------------------------------------------------- */
.gc-aluselect .alu-list {
  margin: 0;
  padding-left: 20px;
}

.gc-aluselect .alu-list li { margin-bottom: 8px; }

.gc-aluselect .alu-list li::marker { color: var(--alu-blue); }

/* --------------------------------------------------------------------------
   Note / disclaimer
   -------------------------------------------------------------------------- */
.gc-aluselect .alu-note {
  background: #e8f0fe;
  border-left: 4px solid var(--alu-blue);
  padding: 16px 20px;
  border-radius: 0 8px 8px 0;
  font-size: 14px;
  color: var(--alu-muted);
}

.gc-aluselect .alu-note strong { color: var(--alu-navy); }

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .gc-aluselect .alu-hero__grid { grid-template-columns: 1fr; min-height: auto; }
  .gc-aluselect .alu-hero__content {
    padding: 56px 24px 0;
    text-align: center;
  }
  .gc-aluselect .alu-hero__sub { margin-left: auto; margin-right: auto; }
  .gc-aluselect .alu-hero__actions { justify-content: center; }
  .gc-aluselect .alu-hero__media { min-height: 360px; padding: 24px 24px 48px; }

  .gc-aluselect .alu-split,
  .gc-aluselect .alu-cta__grid,
  .gc-aluselect .alu-case { grid-template-columns: 1fr; }

  .gc-aluselect .alu-grid--4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .gc-aluselect .alu-section { padding: 52px 0; }
  .gc-aluselect .alu-grid--2,
  .gc-aluselect .alu-grid--3,
  .gc-aluselect .alu-grid--4 { grid-template-columns: 1fr; }
  .gc-aluselect .alu-steps { grid-template-columns: 1fr; }
  .gc-aluselect .alu-decision__split { grid-template-columns: 1fr; }
  .gc-aluselect .alu-quickbar__card { padding: 22px; }
  .gc-aluselect .alu-table th,
  .gc-aluselect .alu-table td { padding: 12px; font-size: 14px; }
}