/* SilverMobilityLab - Shared styles */

:root {
  --primary-color: #4A90A4;
  --secondary-color: #7FB3B8;
  --accent-color: #A8D5BA;
  --text-dark: #2C3E50;
  --text-light: #5A6C7D;
  --bg-light: #F5F9FA;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text-dark);
  line-height: 1.7;
  padding-top: 64px;
}

.gradient-bg {
  background: linear-gradient(135deg, #4A90A4 0%, #7FB3B8 50%, #A8D5BA 100%);
}

/* Fixed header */
#headerNav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: #fff;
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

#headerNav .nav-inner {
  height: 64px;
}

.nav-link {
  position: relative;
  transition: color 0.3s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: width 0.3s ease;
}

.nav-link:hover::after {
  width: 100%;
}

/* Nav dropdowns */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%);
  min-width: 260px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 12px 40px rgba(74, 144, 164, 0.18);
  padding: 8px;
  z-index: 110;
  border: 1px solid rgba(74, 144, 164, 0.12);
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown.open .nav-dropdown-menu {
  display: block;
}

.nav-dropdown-item {
  display: block;
  padding: 10px 14px;
  border-radius: 8px;
  transition: background 0.2s ease;
  color: #2C3E50;
  font-size: 14px;
  font-weight: 500;
}

.nav-dropdown-item:hover {
  background: rgba(74, 144, 164, 0.1);
  color: #4A90A4;
}

.nav-dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.nav-dropdown-toggle .fa-chevron-down {
  font-size: 10px;
  transition: transform 0.2s ease;
}

.nav-dropdown:hover .nav-dropdown-toggle .fa-chevron-down,
.nav-dropdown.open .nav-dropdown-toggle .fa-chevron-down {
  transform: rotate(180deg);
}

#mobileMenu {
  display: none;
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  height: 100dvh;
  background: #fff;
  overflow-x: hidden;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  z-index: 99;
  padding-top: 64px;
}

#mobileMenu.open {
  display: block;
}

.mobile-menu-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid #e5e7eb;
  background: #fff;
  position: sticky;
  top: 0;
  z-index: 1;
}

.mobile-menu-top span {
  font-size: 1.125rem;
  font-weight: 600;
  color: #2C3E50;
}

#mobile-menu-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 9999px;
  background: rgba(74, 144, 164, 0.12);
  color: #4A90A4;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}

#mobile-menu-close:hover {
  background: rgba(74, 144, 164, 0.22);
  color: #3a7a8c;
}

body.mobile-menu-open {
  overflow: hidden;
  position: fixed;
  width: 100%;
  left: 0;
  right: 0;
}

@media (min-width: 768px) {
  #mobileMenu,
  #mobileMenu.open {
    display: none !important;
  }

  body.mobile-menu-open {
    overflow: auto;
    position: static;
  }
}

.publish-date {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.85);
}

.publish-date-light {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: #5A6C7D;
}

.card-hover {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card-hover:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(74, 144, 164, 0.2);
}

.exercise-card {
  background: white;
  border-left: 4px solid var(--primary-color);
  transition: all 0.3s ease;
}

.exercise-card:hover {
  border-left-width: 8px;
  box-shadow: 0 8px 20px rgba(74, 144, 164, 0.15);
}

.section-divider {
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
  margin: 4rem 0;
}

.content-card {
  background: white;
  border-left: 4px solid #4A90A4;
  transition: all 0.3s ease;
}

.content-card:hover {
  border-left-width: 8px;
  box-shadow: 0 8px 20px rgba(74, 144, 164, 0.15);
}

.cross-link {
  color: #4A90A4;
  text-decoration: underline;
  font-weight: 600;
  transition: color 0.3s ease;
}

.cross-link:hover {
  color: #7FB3B8;
}

.benefits-sidebar {
  align-self: start;
  position: sticky;
  top: 88px;
  z-index: 10;
}

@media (max-width: 1023px) {
  .benefits-sidebar {
    position: static;
    top: auto;
    z-index: auto;
  }
}

.article-sidebar {
  position: sticky;
  top: 88px;
}

@media (max-width: 1023px) {
  .article-sidebar {
    position: static;
  }
}

.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.8s ease-out;
}

.hero-pattern {
  background-image:
    radial-gradient(circle at 20% 50%, rgba(74, 144, 164, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(127, 179, 184, 0.1) 0%, transparent 50%);
}

/* ── Homepage: Exercise Categories cards ── */
.card-home-exercise {
  position: relative;
  display: flex;
  flex-direction: column;
  background: #fff;
  border-radius: 1.25rem;
  padding: 1.75rem;
  overflow: hidden;
  border: 1px solid rgba(74, 144, 164, 0.12);
  box-shadow: 0 4px 20px rgba(44, 62, 80, 0.06);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  min-height: 100%;
}

.card-home-exercise::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 5rem;
  height: 5rem;
  background: linear-gradient(135deg, var(--card-accent, #4A90A4) 0%, transparent 70%);
  opacity: 0.15;
  border-radius: 0 1.25rem 0 100%;
}

.card-home-exercise:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 40px rgba(74, 144, 164, 0.18);
}

.card-home-exercise__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.card-home-exercise__icon {
  width: 3.25rem;
  height: 3.25rem;
  border-radius: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: #fff;
  background: var(--card-accent, #4A90A4);
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(74, 144, 164, 0.3);
}

.card-home-exercise__meta {
  text-align: right;
}

.card-home-exercise__category {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--card-accent, #4A90A4);
  margin-bottom: 0.25rem;
}

.card-home-exercise__title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #2C3E50;
  line-height: 1.35;
  margin-bottom: 0.75rem;
}

.card-home-exercise__excerpt {
  font-size: 0.925rem;
  color: #5A6C7D;
  line-height: 1.65;
  flex-grow: 1;
  margin-bottom: 1.25rem;
}

.card-home-exercise__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}

.card-home-exercise__tag {
  font-size: 0.75rem;
  padding: 0.25rem 0.65rem;
  border-radius: 9999px;
  background: rgba(74, 144, 164, 0.08);
  color: #4A90A4;
  border: 1px solid rgba(74, 144, 164, 0.15);
}

.card-home-exercise__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px dashed rgba(74, 144, 164, 0.25);
  margin-top: auto;
}

.card-home-exercise__cta {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--card-accent, #4A90A4);
}

.card-home-exercise__arrow {
  width: 2rem;
  height: 2rem;
  border-radius: 9999px;
  background: rgba(74, 144, 164, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--card-accent, #4A90A4);
  font-size: 0.75rem;
  transition: background 0.2s ease, transform 0.2s ease;
}

.card-home-exercise:hover .card-home-exercise__arrow {
  background: var(--card-accent, #4A90A4);
  color: #fff;
  transform: translateX(3px);
}

/* ── Homepage: Essential Knowledge cards ── */
.card-home-knowledge {
  display: flex;
  flex-direction: column;
  background: #fff;
  border-radius: 1.5rem;
  overflow: hidden;
  border: 2px solid transparent;
  background-clip: padding-box;
  box-shadow: 0 2px 16px rgba(44, 62, 80, 0.07);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
}

.card-home-knowledge::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 1.5rem;
  padding: 2px;
  background: linear-gradient(135deg, var(--card-accent, #4A90A4), rgba(168, 213, 186, 0.5));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.card-home-knowledge:hover {
  transform: scale(1.02);
  box-shadow: 0 12px 36px rgba(74, 144, 164, 0.15);
}

.card-home-knowledge__ribbon {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  background: linear-gradient(90deg, var(--card-accent, #4A90A4) 0%, color-mix(in srgb, var(--card-accent, #4A90A4) 70%, #7FB3B8) 100%);
  color: #fff;
}

.card-home-knowledge__ribbon-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.75rem;
  background: rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.card-home-knowledge__ribbon-text {
  flex: 1;
  min-width: 0;
}

.card-home-knowledge__ribbon-label {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0.85;
}

.card-home-knowledge__ribbon-cat {
  font-size: 0.875rem;
  font-weight: 600;
}

.card-home-knowledge__ribbon-date {
  font-size: 0.75rem;
  opacity: 0.9;
  white-space: nowrap;
}

.card-home-knowledge__body {
  padding: 1.25rem 1.5rem 1.5rem;
}

.card-home-knowledge__title {
  font-size: 1.125rem;
  font-weight: 700;
  color: #2C3E50;
  margin-bottom: 0.625rem;
  line-height: 1.4;
}

.card-home-knowledge__desc {
  font-size: 0.9rem;
  color: #5A6C7D;
  line-height: 1.65;
  margin-bottom: 1rem;
}

.card-home-knowledge__read {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--card-accent, #4A90A4);
}

.card-home-knowledge__read i {
  transition: transform 0.2s ease;
}

.card-home-knowledge:hover .card-home-knowledge__read i {
  transform: translateX(4px);
}

/* ── Index page: Exercise catalog cards ── */
.card-index-exercise {
  display: flex;
  flex-direction: column;
  background: #fff;
  border-radius: 0.875rem;
  overflow: hidden;
  border: 1px solid #e8ecef;
  transition: box-shadow 0.25s ease, border-color 0.25s ease;
  height: 100%;
}

.card-index-exercise:hover {
  border-color: var(--card-accent, #4A90A4);
  box-shadow: 0 8px 28px rgba(74, 144, 164, 0.14);
}

.card-index-exercise__banner {
  padding: 0.65rem 1.25rem;
  background: var(--card-accent, #4A90A4);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.card-index-exercise__banner i {
  font-size: 0.9rem;
  opacity: 0.9;
}

.card-index-exercise__body {
  padding: 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-index-exercise__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: #2C3E50;
  margin-bottom: 0.5rem;
  line-height: 1.35;
}

.card-index-exercise__excerpt {
  font-size: 0.85rem;
  color: #5A6C7D;
  line-height: 1.6;
  margin-bottom: 1rem;
  flex: 1;
}

.card-index-exercise__points {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.35rem;
  margin-bottom: 1rem;
}

.card-index-exercise__point {
  font-size: 0.72rem;
  color: #5A6C7D;
  padding-left: 0.85rem;
  position: relative;
  line-height: 1.4;
}

.card-index-exercise__point::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--card-accent, #4A90A4);
  font-weight: 700;
  font-size: 0.65rem;
}

.card-index-exercise__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.875rem;
  border-top: 1px solid #eef1f3;
  font-size: 0.8rem;
  color: #8a96a3;
}

.card-index-exercise__open {
  font-weight: 600;
  color: var(--card-accent, #4A90A4);
}

/* ── Index page: Essential Knowledge timeline cards ── */
.card-index-knowledge {
  display: flex;
  gap: 0;
  background: #fff;
  border-radius: 1rem;
  overflow: hidden;
  border: 1px solid #e8ecef;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.card-index-knowledge:hover {
  box-shadow: 0 6px 24px rgba(44, 62, 80, 0.1);
  transform: translateX(4px);
}

.card-index-knowledge__date {
  flex-shrink: 0;
  width: 5.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1.25rem 0.75rem;
  background: linear-gradient(180deg, var(--card-accent, #4A90A4) 0%, color-mix(in srgb, var(--card-accent, #4A90A4) 80%, #2C3E50) 100%);
  color: #fff;
  text-align: center;
}

.card-index-knowledge__day {
  font-size: 1.75rem;
  font-weight: 800;
  line-height: 1;
}

.card-index-knowledge__month {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  opacity: 0.9;
  margin-top: 0.15rem;
}

.card-index-knowledge__year {
  font-size: 0.65rem;
  opacity: 0.75;
  margin-top: 0.25rem;
}

.card-index-knowledge__content {
  flex: 1;
  padding: 1.125rem 1.25rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
}

.card-index-knowledge__top {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.4rem;
  flex-wrap: wrap;
}

.card-index-knowledge__cat {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 9999px;
  background: color-mix(in srgb, var(--card-accent, #4A90A4) 12%, transparent);
  color: var(--card-accent, #4A90A4);
}

.card-index-knowledge__cat i {
  margin-right: 0.25rem;
}

.card-index-knowledge__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: #2C3E50;
  margin-bottom: 0.35rem;
  line-height: 1.35;
}

.card-index-knowledge__excerpt {
  font-size: 0.85rem;
  color: #5A6C7D;
  line-height: 1.55;
  margin-bottom: 0.5rem;
}

.card-index-knowledge__link {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--card-accent, #4A90A4);
  align-self: flex-start;
}

.card-index-knowledge__chevron {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  padding-right: 1rem;
  color: #c5cdd4;
  font-size: 0.875rem;
  transition: color 0.2s ease;
}

.card-index-knowledge:hover .card-index-knowledge__chevron {
  color: var(--card-accent, #4A90A4);
}

@media (max-width: 480px) {
  .card-index-knowledge__date {
    width: 4.5rem;
    padding: 1rem 0.5rem;
  }

  .card-index-knowledge__day {
    font-size: 1.4rem;
  }

  .card-index-exercise__points {
    grid-template-columns: 1fr;
  }
}