/* CopperSort — Copper-toned industrial aesthetic */
:root {
  --copper: #c97c4e;
  --copper-dark: #a85f30;
  --copper-light: #e8a97a;
  --copper-pale: #fdf3ec;
  --charcoal: #2a2520;
  --charcoal-light: #4a4238;
  --slate: #6b6560;
  --off-white: #faf8f5;
  --white: #ffffff;
  --error: #d94f3c;
  --success: #4a9e6a;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--off-white);
  color: var(--charcoal);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ─── Navigation ─────────────────────────────────── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  background: var(--charcoal);
  z-index: 100;
  box-shadow: 0 2px 12px rgba(0,0,0,0.18);
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-logo {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--copper-light);
  text-decoration: none;
  letter-spacing: 0.02em;
}
.nav-logo span { color: var(--white); }
.nav-links { display: flex; gap: 8px; list-style: none; }
.nav-links a {
  color: #ccc;
  text-decoration: none;
  font-size: 0.9rem;
  padding: 6px 14px;
  border-radius: 4px;
  transition: background 0.15s, color 0.15s;
}
.nav-links a:hover { background: rgba(255,255,255,0.1); color: var(--white); }
.nav-cta {
  background: var(--copper) !important;
  color: var(--white) !important;
  font-weight: 600;
}
.nav-cta:hover { background: var(--copper-dark) !important; }
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.6rem;
  cursor: pointer;
  padding: 4px;
}

/* ─── Hero ────────────────────────────────────────── */
.hero {
  background: linear-gradient(160deg, var(--charcoal) 0%, #3a2d22 60%, #4d3a28 100%);
  color: var(--white);
  padding: 120px 24px 90px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(201,124,78,0.25) 0%, transparent 70%);
  pointer-events: none;
}
.hero-tag {
  display: inline-block;
  background: rgba(201,124,78,0.2);
  border: 1px solid rgba(201,124,78,0.4);
  color: var(--copper-light);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 20px;
  margin-bottom: 24px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 18px;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}
.hero h1 em {
  font-style: normal;
  color: var(--copper-light);
}
.hero p {
  font-size: 1.15rem;
  color: #bbb;
  max-width: 540px;
  margin: 0 auto 36px;
  line-height: 1.7;
}
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn-primary {
  background: var(--copper);
  color: var(--white);
  border: none;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 700;
  border-radius: 6px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: background 0.15s, transform 0.1s;
}
.btn-primary:hover { background: var(--copper-dark); transform: translateY(-1px); }
.btn-secondary {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,0.3);
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: border-color 0.15s, background 0.15s;
}
.btn-secondary:hover { border-color: rgba(255,255,255,0.6); background: rgba(255,255,255,0.08); }
.hero-trust {
  margin-top: 48px;
  display: flex;
  gap: 32px;
  justify-content: center;
  flex-wrap: wrap;
}
.trust-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #aaa;
  font-size: 0.85rem;
}
.trust-badge strong { color: var(--white); }

/* ─── Sections (shared) ───────────────────────────── */
.section {
  padding: 80px 24px;
  max-width: 1100px;
  margin: 0 auto;
}
.section-dark {
  background: var(--charcoal);
  color: var(--white);
}
.section-light {
  background: var(--white);
}
.section-header { text-align: center; margin-bottom: 52px; }
.section-header h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  margin-bottom: 12px;
}
.section-header p {
  font-size: 1.05rem;
  color: var(--slate);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}
.section-dark .section-header p { color: #aaa; }
.section-copper { color: var(--copper); }

/* ─── Live Price Feed Banner ──────────────────────── */
.price-feed-banner {
  background: var(--charcoal);
  border-top: 2px solid var(--copper);
  padding: 16px 24px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.price-feed-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.price-feed-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--copper-light);
  white-space: nowrap;
  flex-shrink: 0;
}
.live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #4ade80;
  animation: livePulse 2s ease-in-out infinite;
  flex-shrink: 0;
}
@keyframes livePulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}
.price-feed-ticker {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  flex: 1;
  min-width: 0;
}
.ticker-item {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 6px;
  padding: 6px 12px;
  flex-shrink: 0;
}
.ticker-grade {
  font-size: 0.78rem;
  font-weight: 600;
  color: #ccc;
  white-space: nowrap;
}
.ticker-payout {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--copper-light);
  white-space: nowrap;
}
.price-ticker-loading {
  font-size: 0.82rem;
  color: #777;
  font-style: italic;
}
.price-feed-footer {
  font-size: 0.72rem;
  color: #555;
  white-space: nowrap;
  flex-shrink: 0;
}

/* ─── Calculator ──────────────────────────────────── */
.calc-section { background: var(--copper-pale); }
.calc-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  max-width: 960px;
  margin: 0 auto;
  align-items: start;
}
.calc-form {
  background: var(--white);
  border-radius: 12px;
  padding: 32px;
  box-shadow: 0 4px 20px rgba(168,95,48,0.12);
}
.calc-form h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--charcoal);
}
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.88rem;
  margin-bottom: 8px;
  color: var(--charcoal-light);
}
.form-group select,
.form-group input {
  width: 100%;
  padding: 12px 14px;
  border: 2px solid #e0d8d0;
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  background: var(--white);
  color: var(--charcoal);
  transition: border-color 0.15s;
  appearance: none;
  -webkit-appearance: none;
}
.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236b6560' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}
.form-group select:focus,
.form-group input:focus {
  outline: none;
  border-color: var(--copper);
}
.calc-calc-btn {
  width: 100%;
  background: var(--copper);
  color: var(--white);
  border: none;
  padding: 14px;
  font-size: 1rem;
  font-weight: 700;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s;
  margin-top: 8px;
}
.calc-calc-btn:hover { background: var(--copper-dark); }

.calc-result {
  background: var(--charcoal);
  border-radius: 12px;
  padding: 32px;
  color: var(--white);
  position: sticky;
  top: 80px;
}
.calc-result h3 { font-size: 1rem; font-weight: 600; color: #aaa; margin-bottom: 16px; text-transform: uppercase; letter-spacing: 0.06em; }
.calc-result-empty { color: #777; font-size: 0.95rem; line-height: 1.7; }
.calc-result-price {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--copper-light);
  margin-bottom: 4px;
  line-height: 1;
}
.calc-result-label { color: #888; font-size: 0.85rem; margin-bottom: 24px; }
.calc-breakdown { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 20px; }
.calc-breakdown-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  font-size: 0.9rem;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.calc-breakdown-row:last-child { border-bottom: none; }
.calc-breakdown-row .label { color: #aaa; }
.calc-breakdown-row .value { font-weight: 600; }
.calc-breakdown-row.total {
  font-size: 1rem;
  padding-top: 16px;
  margin-top: 8px;
  border-top: 2px solid rgba(201,124,78,0.4);
}
.calc-breakdown-row.total .label { color: #ddd; font-weight: 600; }
.calc-breakdown-row.total .value { color: var(--copper-light); font-size: 1.1rem; }
.calc-disclaimer { font-size: 0.78rem; color: #666; margin-top: 20px; line-height: 1.5; }

.price-note {
  background: rgba(201,124,78,0.1);
  border: 1px solid rgba(201,124,78,0.3);
  border-radius: 8px;
  padding: 16px 20px;
  margin-top: 20px;
  font-size: 0.88rem;
  color: var(--charcoal-light);
  line-height: 1.6;
}
.price-note strong { color: var(--copper-dark); }

/* ─── Copper Grades ───────────────────────────────── */
.grades-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.grade-card {
  background: var(--white);
  border: 2px solid #e8e0d8;
  border-radius: 12px;
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}
.grade-card:hover {
  border-color: var(--copper-light);
  box-shadow: 0 6px 24px rgba(168,95,48,0.12);
  transform: translateY(-2px);
}
.grade-image {
  width: 100%;
  height: 180px;
  object-fit: cover;
  background: var(--copper-pale);
  display: block;
}
.grade-body { padding: 24px; }
.grade-badge {
  display: inline-block;
  background: var(--copper);
  color: var(--white);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 4px;
  margin-bottom: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.grade-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 8px; }
.grade-card p { font-size: 0.9rem; color: var(--slate); line-height: 1.65; margin-bottom: 14px; }
.grade-price { font-weight: 700; color: var(--copper-dark); font-size: 1rem; }
.grade-price span { font-size: 0.8rem; font-weight: 500; color: var(--slate); }
.grade-tip {
  background: rgba(201,124,78,0.08);
  border: 1px solid rgba(201,124,78,0.25);
  border-radius: 6px;
  padding: 10px 14px;
  font-size: 0.82rem;
  color: var(--charcoal-light);
  line-height: 1.55;
  margin-bottom: 12px;
}
.grade-tip strong { color: var(--copper-dark); }

/* ─── How It Works ────────────────────────────────── */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  position: relative;
}
.steps-grid::before {
  content: '';
  position: absolute;
  top: 44px;
  left: 16%;
  right: 16%;
  height: 2px;
  background: linear-gradient(90deg, var(--copper-light) 0%, var(--copper) 100%);
  opacity: 0.4;
}
.step-card { text-align: center; }
.step-number {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--copper);
  color: var(--white);
  font-size: 1.4rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  box-shadow: 0 4px 16px rgba(201,124,78,0.35);
}
.step-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; color: var(--charcoal); }
.step-card p { font-size: 0.9rem; color: var(--slate); line-height: 1.65; }
.section-dark .step-card h3 { color: var(--white); }
.section-dark .step-card p { color: #aaa; }

/* ─── Contact Form ────────────────────────────────── */
.contact-section { background: var(--white); }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  max-width: 960px;
  margin: 0 auto;
  align-items: start;
}
.contact-info h3 { font-size: 1.4rem; font-weight: 700; margin-bottom: 16px; color: var(--charcoal); }
.contact-info p { font-size: 0.95rem; color: var(--slate); line-height: 1.7; margin-bottom: 28px; }
.contact-detail { display: flex; gap: 12px; align-items: flex-start; margin-bottom: 18px; }
.contact-detail-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--copper-pale);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1rem;
}
.contact-detail-text strong { display: block; font-size: 0.88rem; color: var(--charcoal); margin-bottom: 2px; }
.contact-detail-text span { font-size: 0.88rem; color: var(--slate); }

.contact-form {
  background: var(--off-white);
  border: 2px solid #e8e0d8;
  border-radius: 12px;
  padding: 32px;
}
.contact-form h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group.full-width { grid-column: 1 / -1; }
.form-group.radio-group { display: flex; gap: 20px; flex-wrap: wrap; }
.radio-option {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--charcoal-light);
}
.radio-option input[type="radio"] { accent-color: var(--copper); }
.form-submit {
  width: 100%;
  background: var(--copper);
  color: var(--white);
  border: none;
  padding: 14px;
  font-size: 1rem;
  font-weight: 700;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s;
  margin-top: 8px;
}
.form-submit:hover { background: var(--copper-dark); }
.form-success {
  display: none;
  background: #e8f5ec;
  border: 1px solid var(--success);
  border-radius: 8px;
  padding: 20px;
  color: #2a7a4a;
  font-size: 0.95rem;
  text-align: center;
}

/* ─── FAQ ─────────────────────────────────────────── */
.faq-list { max-width: 680px; margin: 0 auto; }
.faq-item {
  border-bottom: 1px solid #e0d8d0;
  padding: 20px 0;
}
.faq-item:first-child { border-top: 1px solid #e0d8d0; }
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  color: var(--charcoal);
  gap: 16px;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  font-family: inherit;
  padding: 0;
}
.faq-question:hover { color: var(--copper); }
.faq-toggle { font-size: 1.3rem; color: var(--copper); transition: transform 0.2s; flex-shrink: 0; }
.faq-item.open .faq-toggle { transform: rotate(45deg); }
.faq-answer {
  display: none;
  padding-top: 12px;
  font-size: 0.93rem;
  color: var(--slate);
  line-height: 1.7;
}
.faq-item.open .faq-answer { display: block; }

/* ─── Footer ──────────────────────────────────────── */
footer {
  background: var(--charcoal);
  color: #777;
  padding: 40px 24px;
  text-align: center;
}
footer p { font-size: 0.85rem; }
footer a { color: #aaa; text-decoration: none; }
footer a:hover { color: var(--copper-light); }

/* ─── CTA Banner ──────────────────────────────────── */
.cta-banner {
  background: linear-gradient(135deg, var(--copper) 0%, var(--copper-dark) 100%);
  color: var(--white);
  text-align: center;
  padding: 64px 24px;
}
.cta-banner h2 { font-size: clamp(1.8rem, 3.5vw, 2.4rem); font-weight: 800; margin-bottom: 14px; }
.cta-banner p { opacity: 0.9; font-size: 1.05rem; margin-bottom: 32px; max-width: 500px; margin-left: auto; margin-right: auto; }
.cta-banner .btn-primary { background: var(--white); color: var(--copper-dark); font-size: 1rem; }
.cta-banner .btn-primary:hover { background: #f0f0f0; }

/* ─── Mobile ──────────────────────────────────────── */
@media (max-width: 768px) {
  .mobile-menu-btn { display: block; }
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: var(--charcoal);
    padding: 16px 24px;
    gap: 4px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.3);
  }
  .calc-wrapper { grid-template-columns: 1fr; }
  .calc-result { position: static; }
  .steps-grid { grid-template-columns: 1fr; }
  .steps-grid::before { display: none; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .hero { padding: 100px 24px 60px; }
  .section { padding: 60px 20px; }
  .grades-grid { grid-template-columns: 1fr; }
  .hero-trust { gap: 20px; }
}