/* assets/css/why-frp.css */

/* ── HERO ── */
.frp-hero {
  position: relative;
  min-height: 40vh;
  display: flex;
  align-items: flex-end;
  padding-top: var(--nav-height);
  overflow: hidden;
}

.frp-hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/frp-diagram.jpg');
  background-size: cover;
  background-position: center 40%;
  filter: brightness(0.28);
  z-index: 0;
}

.frp-hero-content {
  position: relative;
  z-index: 1;
  padding-top: var(--space-lg);
  padding-bottom: var(--space-lg);
  max-width: var(--container-max);
  width: 100%;
}

.frp-hero-content .section-label {
  color: #ff7a40;
}

.frp-hero-title {
  font-size: clamp(2.4rem, 5vw, var(--text-5xl));
  font-weight: 800;
  color: #ffffff;
  line-height: 1.1;
  margin: 0.5rem 0 1.25rem;
}

.frp-hero-subtitle {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.72);
  max-width: 600px;
  line-height: 1.7;
}

/* ── ADVANTAGES GRID ── */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.advantage-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 2.25rem 2rem;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}

.advantage-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(232, 82, 10, 0.1);
  border-color: rgba(232, 82, 10, 0.25);
}

.advantage-icon {
  width: 56px;
  height: 56px;
  background: rgba(232, 82, 10, 0.08);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-orange);
  margin-bottom: 1.25rem;
  flex-shrink: 0;
}

.advantage-icon svg {
  width: 28px;
  height: 28px;
}

.advantage-stat {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-orange);
  line-height: 1;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.advantage-title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.advantage-desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
}

.advantage-desc strong {
  color: var(--text-primary);
}

/* ── COMPARISON TABLE ── */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
  margin-top: var(--space-md);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  font-size: var(--text-base);
}

.comparison-table thead tr {
  border-bottom: 2px solid var(--border-color);
}

.comparison-table th {
  padding: 1.25rem 1.5rem;
  text-align: left;
  font-weight: 700;
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.comparison-table th.col-characteristic {
  color: var(--text-muted);
  width: 32%;
}

.comparison-table th.col-steel {
  color: var(--text-secondary);
  background: var(--bg-secondary);
  width: 30%;
  border-left: 1px solid var(--border-color);
}

.comparison-table th.col-frp {
  background: var(--color-orange);
  color: #ffffff;
  width: 30%;
  border-left: 1px solid rgba(255, 255, 255, 0.2);
}

.frp-col-label {
  display: block;
  font-size: var(--text-lg);
  font-weight: 800;
  letter-spacing: 0.02em;
  text-transform: none;
}

.frp-col-badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  padding: 0.15rem 0.65rem;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 0.3rem;
}

.comparison-table tbody tr {
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition);
}

.comparison-table tbody tr:last-child {
  border-bottom: none;
}

.comparison-table tbody tr:hover {
  background: rgba(232, 82, 10, 0.03);
}

.comparison-table td {
  padding: 1.1rem 1.5rem;
  vertical-align: middle;
}

td.row-label {
  font-weight: 600;
  color: var(--text-primary);
  font-size: var(--text-sm);
}

td.col-steel-val {
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border-left: 1px solid var(--border-color);
  font-size: var(--text-sm);
}

td.col-frp-val {
  background: rgba(232, 82, 10, 0.04);
  border-left: 1px solid rgba(232, 82, 10, 0.15);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

td.col-frp-val.frp-winner {
  color: var(--color-orange);
  font-weight: 700;
  background: rgba(232, 82, 10, 0.07);
}

.badge-pass {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: rgba(16, 185, 129, 0.1);
  color: #059669;
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: var(--border-radius);
  padding: 0.25rem 0.65rem;
  font-size: 0.8rem;
  font-weight: 600;
}

.badge-fail {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: rgba(239, 68, 68, 0.08);
  color: #dc2626;
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: var(--border-radius);
  padding: 0.25rem 0.65rem;
  font-size: 0.8rem;
  font-weight: 600;
}

[data-theme="dark"] .badge-pass {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border-color: rgba(16, 185, 129, 0.3);
}

[data-theme="dark"] .badge-fail {
  background: rgba(239, 68, 68, 0.12);
  color: #f87171;
  border-color: rgba(239, 68, 68, 0.25);
}

/* ── MATERIAL SCIENCE ── */
.science-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: start;
}

.science-para {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1.25rem;
  font-size: var(--text-base);
}

.science-para strong {
  color: var(--text-primary);
}

.science-properties {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  margin-top: 1.5rem;
  padding: 1.5rem;
  background: var(--bg-secondary);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
}

.science-prop {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.5;
}

.science-prop-dot {
  width: 8px;
  height: 8px;
  background: var(--color-orange);
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 0.35rem;
}

.science-image-col {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.science-img-main {
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
}

.science-img-main img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  display: block;
}

.science-img-secondary {
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
  position: relative;
}

.science-img-secondary img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}

.science-img-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.6);
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.5rem 0.85rem;
  letter-spacing: 0.02em;
}

/* ── TEST RESULTS ── */
.test-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.test-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 2rem 1.5rem;
  text-align: center;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}

.test-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(232, 82, 10, 0.1);
  border-color: rgba(232, 82, 10, 0.2);
}

.test-number {
  font-size: clamp(2.4rem, 4vw, 3.2rem);
  font-weight: 800;
  color: var(--color-orange);
  line-height: 1;
  letter-spacing: -0.03em;
}

.test-unit {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-orange);
  opacity: 0.7;
  margin-top: 0.2rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.test-label {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 1rem;
  line-height: 1.35;
}

.test-note {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-top: 0.5rem;
  line-height: 1.5;
}

.test-footnote {
  margin-top: var(--space-md);
  padding: 1rem 1.5rem;
  background: rgba(232, 82, 10, 0.06);
  border-left: 3px solid var(--color-orange);
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── APPLICATIONS ── */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.app-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 2rem 1.5rem;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}

.app-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 36px rgba(232, 82, 10, 0.1);
  border-color: rgba(232, 82, 10, 0.2);
}

.app-icon {
  width: 64px;
  height: 64px;
  background: rgba(232, 82, 10, 0.08);
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-orange);
  margin-bottom: 1.25rem;
}

.app-icon svg {
  width: 36px;
  height: 36px;
}

.app-title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.app-desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 1rem;
}

.app-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.app-list li {
  font-size: var(--text-sm);
  color: var(--text-muted);
  padding-left: 1rem;
  position: relative;
}

.app-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 5px;
  height: 5px;
  background: var(--color-orange);
  border-radius: 50%;
}

/* ── REBAR VISUAL BAND ── */
.rebar-visual-band {
  position: relative;
  height: 420px;
  overflow: hidden;
}

.rebar-visual-img {
  position: absolute;
  inset: 0;
}

.rebar-visual-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.rebar-visual-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    rgba(0, 0, 0, 0.78) 0%,
    rgba(0, 0, 0, 0.5) 55%,
    rgba(0, 0, 0, 0.15) 100%
  );
  display: flex;
  align-items: center;
}

.rebar-visual-content {
  max-width: 560px;
}

.rebar-visual-content h2 {
  font-size: clamp(1.6rem, 3vw, var(--text-3xl));
  font-weight: 800;
  color: #ffffff;
  margin: 0.5rem 0 1rem;
  line-height: 1.2;
}

.rebar-visual-content p {
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.7;
  margin-bottom: 1.5rem;
  font-size: var(--text-base);
}

/* ── CTA ── */
.frp-cta {
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

.frp-cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

.frp-cta-text h2 {
  font-size: var(--text-3xl);
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.frp-cta-text p {
  font-size: var(--text-lg);
  color: var(--text-secondary);
}

.frp-cta-actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  flex-shrink: 0;
}

/* ── RESPONSIVE ── */
@media (max-width: 1100px) {
  .advantages-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .apps-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .test-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  .science-grid {
    grid-template-columns: 1fr;
  }

  .science-image-col {
    flex-direction: row;
  }

  .science-img-main,
  .science-img-secondary {
    flex: 1;
  }

  .science-img-main img {
    height: 240px;
  }

  .science-img-secondary img {
    height: 240px;
  }

  .frp-cta-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-md);
  }
}

@media (max-width: 768px) {
  .frp-hero {
    min-height: 50vh;
    align-items: center;
  }

  .frp-hero-title {
    font-size: 2rem;
  }

  .advantages-grid {
    grid-template-columns: 1fr;
  }

  .apps-grid {
    grid-template-columns: 1fr;
  }

  .test-grid {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }

  .science-image-col {
    flex-direction: column;
  }

  .comparison-table th,
  .comparison-table td {
    padding: 0.85rem 1rem;
  }

  .rebar-visual-band {
    height: 360px;
  }

  .rebar-visual-overlay {
    background: rgba(0, 0, 0, 0.65);
  }

  .rebar-visual-content {
    max-width: 100%;
  }

  .frp-cta-actions {
    width: 100%;
  }

  .frp-cta-actions .btn {
    flex: 1;
    justify-content: center;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .table-wrapper {
    font-size: var(--text-sm);
  }

  .comparison-table th.col-characteristic,
  .comparison-table th.col-steel,
  .comparison-table th.col-frp {
    width: auto;
  }

  .badge-pass,
  .badge-fail {
    font-size: 0.72rem;
    padding: 0.2rem 0.5rem;
  }

  .frp-cta-actions .btn {
    font-size: var(--text-sm);
    padding: 0.65rem 1rem;
  }
}

/* ── ANIMATED COMPARISON BARS ── */
.compare-bar-wrap {
  margin: var(--space-md) 0;
}

.compare-bar-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.compare-bar-label {
  font-size: var(--text-sm);
  font-weight: 600;
  width: 80px;
  flex-shrink: 0;
  color: var(--text-secondary);
}

.compare-bar-label.frp {
  color: var(--color-orange);
}

.compare-bar-track {
  flex: 1;
  height: 8px;
  background: var(--border-color);
  border-radius: 4px;
  overflow: hidden;
}

.compare-bar-fill {
  height: 100%;
  width: 0;
  border-radius: 4px;
  background: var(--border-color);
  transition: width 1.2s cubic-bezier(0.22, 1, 0.36, 1);
}

.compare-bar-fill.frp {
  background: var(--color-orange);
}

.compare-bar-value {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--text-muted);
  width: 90px;
  flex-shrink: 0;
  text-align: right;
}

.compare-bar-value.frp {
  color: var(--color-orange);
}

/* ── TABLE ROW HOVER ── */
.comparison-table tbody tr:hover {
  background: var(--color-orange-glow);
}

/* ── ADVANTAGE CARD HOVER ── */
.advantage-card {
  transition: transform var(--transition), box-shadow var(--transition);
}

.advantage-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 0 0 1px var(--color-orange-border), var(--shadow-hover);
}