/* =====================================================
   Helix Therapeutics — Component Library
   Cards · Forms · Modals · Badges · Tables · Tabs
   ===================================================== */

/* ===================== CARDS ===================== */

/* -- Generic Card -- */
.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}
.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}
.card-body { padding: 1.5rem; }
.card-img { width: 100%; height: 200px; object-fit: cover; }

/* -- Product Card -- */
.product-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
}

.product-card-img {
  position: relative;
  height: 200px;
  background: linear-gradient(135deg, var(--color-gray-100) 0%, var(--color-gray-200) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.product-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.product-card-img-placeholder {
  font-size: 3rem;
  color: var(--color-gray-400);
}

.product-card-badge {
  position: absolute;
  top: .75rem;
  left: .75rem;
  background: var(--color-accent);
  color: white;
  font-size: .7rem;
  font-weight: 700;
  padding: .2rem .6rem;
  border-radius: 100px;
  letter-spacing: .05em;
  text-transform: uppercase;
}

.product-card-body {
  padding: 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.product-card-cat {
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--color-accent);
  margin-bottom: .35rem;
}
.product-card-name {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: .35rem;
  line-height: 1.3;
}
.product-card-ref {
  font-size: .8rem;
  color: var(--color-gray-600);
  margin-bottom: .75rem;
}
.product-card-desc {
  font-size: .875rem;
  color: var(--color-gray-800);
  line-height: 1.55;
  flex: 1;
  margin-bottom: 1rem;
}

.product-card-footer {
  display: flex;
  gap: .5rem;
  align-items: center;
}
.product-card-footer .btn { flex: 1; justify-content: center; font-size: .85rem; padding: .55rem 1rem; }

.compare-btn {
  background: var(--color-gray-100);
  color: var(--color-gray-600);
  border: 1px solid var(--color-border);
  padding: .55rem .85rem;
  border-radius: var(--radius-sm);
  font-size: .8rem;
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}
.compare-btn:hover, .compare-btn.active {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

/* -- Category Card (homepage products section) -- */
.category-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: block;
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
}
.category-card-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 400ms ease;
}
.category-card:hover .category-card-bg { transform: scale(1.06); }
.category-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10,20,60,.85) 0%, rgba(10,20,60,.3) 60%, transparent 100%);
  transition: background var(--transition);
}
.category-card:hover .category-card-overlay {
  background: linear-gradient(to top, rgba(10,20,60,.9) 0%, rgba(10,20,60,.5) 70%, rgba(10,20,60,.2) 100%);
}
.category-card-body {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1.5rem;
  color: white;
}
.category-card-icon {
  width: 44px;
  height: 44px;
  background: rgba(255,255,255,.15);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: white;
  margin-bottom: .75rem;
}
.category-card-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: white;
  margin-bottom: .25rem;
}
.category-card-count {
  font-size: .8rem;
  color: rgba(255,255,255,.7);
}
.category-card-arrow {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  width: 32px;
  height: 32px;
  background: rgba(255,255,255,.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: .8rem;
  transform: translateX(-4px);
  opacity: 0;
  transition: opacity var(--transition), transform var(--transition);
}
.category-card:hover .category-card-arrow {
  opacity: 1;
  transform: translateX(0);
}

/* -- News Card -- */
.news-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}
.news-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }

.news-card-img {
  height: 210px;
  background: var(--color-gray-100);
  overflow: hidden;
}
.news-card-img img { width: 100%; height: 100%; object-fit: cover; }

.news-card-body { padding: 1.25rem; }
.news-card-meta {
  display: flex;
  align-items: center;
  gap: .75rem;
  font-size: .8rem;
  color: var(--color-gray-600);
  margin-bottom: .6rem;
}
.news-card-cat {
  background: #EFF6FF;
  color: var(--color-accent);
  font-weight: 600;
  padding: .2rem .6rem;
  border-radius: 100px;
  font-size: .75rem;
}
.news-card-title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.35;
  margin-bottom: .6rem;
}
.news-card-title a { color: inherit; }
.news-card-title a:hover { color: var(--color-accent); }
.news-card-excerpt {
  font-size: .875rem;
  color: var(--color-gray-600);
  line-height: 1.6;
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-card-link {
  font-size: .875rem;
  font-weight: 600;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: .35rem;
  transition: gap var(--transition);
}
.news-card-link:hover { gap: .6rem; color: var(--color-accent); }

/* -- Feature / Tech Card -- */
.feature-card {
  padding: 2rem;
  border-radius: var(--radius-lg);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  transition: box-shadow var(--transition), transform var(--transition);
}
.feature-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }

.feature-icon {
  width: 56px;
  height: 56px;
  background: #EFF6FF;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--color-accent);
  margin-bottom: 1.25rem;
}
.feature-card h3 { font-size: 1.1rem; margin-bottom: .5rem; }
.feature-card p  { font-size: .9rem; color: var(--color-gray-600); margin: 0; }

/* ===================== FORMS ===================== */

.form-group {
  margin-bottom: 1.25rem;
}
.form-label {
  display: block;
  font-size: .875rem;
  font-weight: 600;
  color: var(--color-gray-800);
  margin-bottom: .4rem;
}
.form-label .required { color: #EF4444; margin-left: 2px; }

.form-control {
  width: 100%;
  padding: .7rem 1rem;
  font-size: .95rem;
  font-family: var(--font-body);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-white);
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
  appearance: none;
}
.form-control:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0,102,204,.12);
}
.form-control.error { border-color: #EF4444; }
.form-control::placeholder { color: var(--color-gray-400); }

textarea.form-control { resize: vertical; min-height: 130px; }

.form-error {
  font-size: .8rem;
  color: #EF4444;
  margin-top: .3rem;
  display: none;
}
.form-group.has-error .form-error { display: block; }

/* Checkbox */
.form-check {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  cursor: pointer;
}
.form-check input[type="checkbox"] {
  width: 18px;
  height: 18px;
  border: 2px solid var(--color-border);
  border-radius: 3px;
  flex-shrink: 0;
  margin-top: 2px;
  accent-color: var(--color-primary);
  cursor: pointer;
}
.form-check-label {
  font-size: .875rem;
  color: var(--color-gray-800);
  line-height: 1.5;
}
.form-check-label a { color: var(--color-accent); }

/* Form submit feedback */
.form-success {
  background: #F0FDF4;
  border: 1px solid #BBF7D0;
  color: #166534;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: .9rem;
  font-weight: 500;
  display: none;
  align-items: center;
  gap: .75rem;
}
.form-success.visible { display: flex; }

.form-failure {
  background: #FEF2F2;
  border: 1px solid #FECACA;
  color: #991B1B;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: .9rem;
  display: none;
  align-items: center;
  gap: .75rem;
}
.form-failure.visible { display: flex; }

/* ===================== MODALS ===================== */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  backdrop-filter: blur(4px);
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}
.modal-backdrop.open { opacity: 1; visibility: visible; }

.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -56%);
  z-index: 2001;
  background: var(--color-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: min(480px, 95vw);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition);
}
.modal.open { opacity: 1; visibility: visible; transform: translate(-50%, -50%); }

.modal-header {
  padding: 1.5rem 1.5rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-border);
}
.modal-header h3 { font-size: 1.2rem; margin: 0; }
.modal-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray-600);
  font-size: 1.1rem;
  transition: background var(--transition), color var(--transition);
}
.modal-close:hover { background: var(--color-gray-100); color: var(--color-text); }

.modal-body { padding: 1.5rem; }

/* Modal Tabs */
.modal-tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--color-border);
  margin-bottom: 1.5rem;
}
.modal-tab {
  padding: .6rem 1.25rem;
  font-size: .9rem;
  font-weight: 600;
  color: var(--color-gray-600);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color var(--transition), border-color var(--transition);
}
.modal-tab.active { color: var(--color-primary); border-bottom-color: var(--color-primary); }

.modal-tab-content { display: none; }
.modal-tab-content.active { display: block; }

/* ===================== BADGES ===================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  padding: .25rem .75rem;
  border-radius: 100px;
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .03em;
}
.badge-blue    { background: #EFF6FF; color: var(--color-accent); }
.badge-green   { background: #F0FDF4; color: #166534; }
.badge-primary { background: var(--color-primary); color: white; }

/* ===================== TABLES ===================== */

.table-wrapper { overflow-x: auto; border-radius: var(--radius-md); border: 1px solid var(--color-border); }

table { width: 100%; border-collapse: collapse; font-size: .9rem; }
thead th {
  background: var(--color-gray-100);
  color: var(--color-text);
  font-weight: 600;
  padding: .875rem 1rem;
  text-align: left;
  white-space: nowrap;
  border-bottom: 1px solid var(--color-border);
}
tbody td {
  padding: .875rem 1rem;
  color: var(--color-gray-800);
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover td { background: var(--color-gray-100); }

/* ===================== PAGINATION ===================== */

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  margin-top: 3rem;
}
.page-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .875rem;
  font-weight: 500;
  border: 1px solid var(--color-border);
  color: var(--color-gray-800);
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.page-btn:hover { background: var(--color-gray-100); }
.page-btn.active { background: var(--color-primary); color: white; border-color: var(--color-primary); }
.page-btn[disabled] { opacity: .4; pointer-events: none; }

/* ===================== COMPARE BAR ===================== */

.compare-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-primary-dark);
  color: white;
  padding: 1rem 0;
  z-index: 900;
  transform: translateY(100%);
  transition: transform 300ms ease;
  box-shadow: 0 -4px 20px rgba(0,0,0,.25);
}
.compare-bar.visible { transform: translateY(0); }
.compare-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.compare-bar-items {
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
}
.compare-bar-item {
  display: flex;
  align-items: center;
  gap: .5rem;
  background: rgba(255,255,255,.1);
  padding: .4rem .9rem;
  border-radius: 100px;
  font-size: .875rem;
}
.compare-bar-remove {
  background: none;
  color: rgba(255,255,255,.7);
  border: none;
  font-size: .85rem;
  padding: 0;
  cursor: pointer;
  transition: color var(--transition);
}
.compare-bar-remove:hover { color: white; }
.compare-bar-actions { display: flex; gap: .75rem; align-items: center; }
.compare-bar-clear { color: rgba(255,255,255,.6); font-size: .875rem; text-decoration: underline; cursor: pointer; }
.compare-bar-clear:hover { color: white; }

/* ===================== SPINNER ===================== */

.spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,.4);
  border-top-color: white;
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===================== FOOTER ===================== */

.site-footer {
  background: #0D1F42;
  color: rgba(255,255,255,.8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  padding: 4rem 0;
}

.footer-logo { height: 50px; margin-bottom: 1rem; }
.footer-col p { font-size: .9rem; color: rgba(255,255,255,.6); line-height: 1.7; }

.footer-col h4 {
  font-size: .85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: rgba(255,255,255,.4);
  margin-bottom: 1.25rem;
}
.footer-col ul li { margin-bottom: .6rem; }
.footer-col ul li a {
  color: rgba(255,255,255,.7);
  font-size: .9rem;
  transition: color var(--transition);
}
.footer-col ul li a:hover { color: white; }

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  margin-bottom: .75rem;
  font-size: .9rem;
  color: rgba(255,255,255,.7);
}
.footer-contact-item i { color: var(--color-accent); margin-top: 3px; flex-shrink: 0; }

.footer-social {
  display: flex;
  gap: .6rem;
  margin-top: 1.25rem;
}
.footer-social a {
  width: 34px;
  height: 34px;
  background: rgba(255,255,255,.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,.7);
  font-size: .85rem;
  transition: background var(--transition), color var(--transition);
}
.footer-social a:hover { background: var(--color-accent); color: white; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 1.25rem 0;
}
.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .75rem;
}
.footer-bottom p { font-size: .85rem; color: rgba(255,255,255,.4); margin: 0; }
.footer-legal {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}
.footer-legal a { font-size: .8rem; color: rgba(255,255,255,.4); }
.footer-legal a:hover { color: rgba(255,255,255,.8); }

/* -- Footer responsive -- */
@media (max-width: 960px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; padding: 3rem 0; }
}
@media (max-width: 640px) {
  .footer-grid { grid-template-columns: 1fr; gap: 1.75rem; }
  .footer-bottom-inner { flex-direction: column; text-align: center; }
  .footer-legal { justify-content: center; }
}

/* ===================== SCROLL REVEAL ===================== */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 550ms ease, transform 550ms ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 100ms; }
.reveal-delay-2 { transition-delay: 200ms; }
.reveal-delay-3 { transition-delay: 300ms; }
.reveal-delay-4 { transition-delay: 400ms; }