/* ==========================================================================
   Components — Buttons, Cards, Tables, Chips, Inputs, Navigation
   Following "The Architectural Ledger" design system.
   ========================================================================== */

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-weight: 700;
  border-radius: var(--radius-xl);
  transition: all var(--transition-normal);
  cursor: pointer;
  text-decoration: none;
  line-height: 1;
}

.btn-primary {
  background-color: var(--color-teal);
  color: #ffffff;
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-body-lg);
  border-radius: var(--radius-xl);
  box-shadow: 0 4px 20px rgba(0, 128, 128, 0.2);
}

.btn-primary:hover {
  background-color: var(--color-teal-hover);
  box-shadow: 0 6px 24px rgba(0, 128, 128, 0.3);
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-body-lg);
  border: 2px solid var(--color-outline-variant);
  border-radius: var(--radius-xl);
}

.btn-secondary:hover {
  background-color: var(--color-surface-container-low);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-label-lg);
  border-radius: var(--radius-lg);
}

.btn-action {
  background-color: var(--color-secondary);
  color: var(--color-on-secondary);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-label-md);
  font-weight: 700;
  border-radius: var(--radius-sm);
}

.btn-action:hover {
  opacity: 0.9;
}

.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-label-md);
  font-weight: 700;
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--radius-sm);
}

.btn-ghost:hover {
  background-color: var(--color-surface-container-low);
}

/* ---- Cards ---- */
.card {
  background-color: var(--color-surface-container-lowest);
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid rgba(195, 198, 209, 0.1);
}

.card--elevated {
  box-shadow: var(--shadow-ambient);
}

.card--padded {
  padding: var(--space-6);
}

@media (min-width: 1024px) {
  .card--padded {
    padding: var(--space-8);
  }
}

.card--large {
  border-radius: var(--radius-3xl);
  padding: var(--space-8);
  border: 1px solid rgba(195, 198, 209, 0.3);
  box-shadow: var(--shadow-sm);
}

@media (min-width: 1024px) {
  .card--large {
    padding: var(--space-12);
  }
}

/* ---- Data Table ---- */
.data-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  background-color: var(--color-surface-container-lowest);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(195, 198, 209, 0.15);
}

.data-table {
  width: 100%;
  text-align: left;
  border-collapse: collapse;
  min-width: 700px;
}

.data-table thead {
  background-color: var(--color-surface-container-low);
}

.data-table th {
  padding: var(--space-4) var(--space-6);
  font-family: var(--font-label);
  font-size: var(--text-label-md);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-outline);
}

.data-table td {
  padding: 1.25rem var(--space-6);
  font-size: var(--text-body-md);
}

.data-table tbody tr {
  transition: background-color var(--transition-fast);
}

.data-table tbody tr:hover {
  background-color: var(--color-surface-container-high);
}

.data-table tbody tr:hover td:first-child {
  border-left: 2px solid var(--color-secondary);
  padding-left: calc(var(--space-6) - 2px);
}

/* ---- Provider Avatar / Logo ---- */
.provider-avatar {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: var(--text-body-md);
  flex-shrink: 0;
}

.provider-logo {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-sm);
  object-fit: contain;
  flex-shrink: 0;
}

.provider-info {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.provider-name {
  font-weight: 700;
  color: var(--color-primary);
}

/* ---- Tags / Badges ---- */
.tag {
  display: inline-block;
  padding: var(--space-1) var(--space-2);
  background-color: var(--color-surface-container-high);
  border-radius: var(--radius-sm);
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.tag--highlight {
  background-color: var(--color-secondary-fixed);
  color: var(--color-on-secondary-fixed);
}

/* ---- Chips (Filter) ---- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-6);
  background-color: var(--color-surface-container-high);
  border-radius: var(--radius-lg);
  font-size: var(--text-body-md);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
}

.chip:hover {
  background-color: var(--color-surface-container-highest);
}

.chip--active {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
}

.chip--active:hover {
  background-color: var(--color-primary-container);
}

/* ---- Input Fields ---- */
.input-block {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-surface-container-low);
  border: 1px solid rgba(195, 198, 209, 0.3);
  border-radius: var(--radius-lg);
  font-size: var(--text-body-lg);
  transition: border-color var(--transition-fast);
}

.input-block:focus {
  outline: none;
  border-color: var(--color-secondary);
}

.input-block--error {
  border-bottom: 2px solid var(--color-error);
}

/* Range Slider */
.range-slider {
  width: 100%;
  height: 0.5rem;
  background-color: var(--color-surface-container-high);
  border-radius: var(--radius-full);
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 1.25rem;
  height: 1.25rem;
  background-color: var(--color-secondary);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 100, 146, 0.3);
}

.range-slider::-moz-range-thumb {
  width: 1.25rem;
  height: 1.25rem;
  background-color: var(--color-secondary);
  border-radius: 50%;
  cursor: pointer;
  border: none;
  box-shadow: 0 2px 8px rgba(0, 100, 146, 0.3);
}

/* ---- Glass Panel ---- */
.glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

/* ---- Navigation ---- */
.nav {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 50;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid rgba(0, 30, 64, 0.05);
}

.nav__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 80rem;
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 5rem;
}

.nav__logo {
  display: flex;
  align-items: center;
}

.nav__logo img {
  height: 28px;
  width: auto;
}

.nav__links {
  display: none;
  align-items: center;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .nav__links {
    display: flex;
  }
}

.nav__link {
  font-size: var(--text-body-md);
  font-weight: 500;
  color: var(--color-on-surface-variant);
  transition: color var(--transition-fast);
}

.nav__link:hover {
  color: var(--color-primary);
}

.nav__link--active {
  color: var(--color-secondary);
  border-bottom: 2px solid var(--color-secondary);
  font-weight: 600;
}

.nav__right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav__badge {
  display: none;
  font-size: var(--text-label-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-on-surface-variant);
}

@media (min-width: 768px) {
  .nav__badge {
    display: inline-block;
  }
}

.nav__hamburger {
  color: var(--color-primary);
  cursor: pointer;
  font-size: 1.5rem;
}

@media (min-width: 768px) {
  .nav__hamburger {
    display: none;
  }
}

/* ---- Mobile Menu ---- */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.mobile-menu.is-open {
  opacity: 1;
  pointer-events: all;
}

.mobile-menu__link {
  font-family: var(--font-headline);
  font-size: var(--text-headline-lg);
  font-weight: 700;
  color: var(--color-primary);
}

.mobile-menu__close {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  font-size: 2rem;
  color: var(--color-primary);
  cursor: pointer;
}

/* ---- Footer ---- */
.footer {
  border-top: 1px solid rgba(0, 30, 64, 0.1);
  background-color: var(--color-surface-container-low);
  padding: var(--space-12) 0;
}

.footer__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  max-width: 80rem;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

@media (min-width: 768px) {
  .footer__inner {
    grid-template-columns: 1fr 1fr;
  }
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.footer__logo {
  font-family: var(--font-headline);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary);
}

.footer__copy {
  font-size: var(--text-body-md);
  color: var(--color-on-surface-variant);
  max-width: 24rem;
}

.footer__badges {
  display: flex;
  gap: var(--space-4);
}

.footer__badge-icon {
  background: var(--color-surface-container-lowest);
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-surface-container-high);
}

.footer__badge-icon .material-symbols-outlined {
  color: var(--color-primary);
  font-size: 1.25rem;
}

.footer__nav-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
}

.footer__nav-title {
  font-size: var(--text-label-md);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.footer__nav-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer__nav-link {
  font-size: var(--text-body-md);
  color: var(--color-on-surface-variant);
  transition: color var(--transition-fast);
}

.footer__nav-link:hover {
  color: var(--color-secondary);
}

/* ---- Trust Indicators ---- */
.trust-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-4) var(--space-8);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-on-surface-variant);
}

.trust-item .material-symbols-outlined {
  color: var(--color-secondary);
  font-size: 1.25rem;
}

.trust-item span:last-child {
  font-size: var(--text-body-md);
  font-weight: 600;
}

/* ---- How It Works Steps ---- */
.step-icon {
  width: 5rem;
  height: 5rem;
  background-color: var(--color-surface-container-low);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-6);
}

.step-icon .material-symbols-outlined {
  font-size: 2rem;
  color: var(--color-secondary);
}

/* ---- Blog Card ---- */
.blog-card {
  background-color: var(--color-surface-container-lowest);
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid rgba(195, 198, 209, 0.1);
  cursor: pointer;
  transition: transform var(--transition-normal);
}

.blog-card:hover {
  transform: translateY(-2px);
}

.blog-card__image {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.blog-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.blog-card:hover .blog-card__image img {
  transform: scale(1.05);
}

.blog-card__placeholder {
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
}

.blog-card__placeholder .material-symbols-outlined {
  font-size: 3rem;
  color: rgba(255, 255, 255, 0.7);
}

.blog-card__body {
  padding: var(--space-6);
}

.blog-card__date {
  font-size: var(--text-label-md);
  font-weight: 700;
  color: var(--color-outline);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-2);
}

.blog-card__title {
  font-family: var(--font-headline);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
  transition: color var(--transition-fast);
}

.blog-card:hover .blog-card__title {
  color: var(--color-secondary);
}

.blog-card__excerpt {
  font-size: var(--text-body-md);
  color: var(--color-on-surface-variant);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---- Calculator Result Cards ---- */
.calc-result {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem;
  border-radius: var(--radius-2xl);
  transition: all var(--transition-fast);
}

.calc-result--best {
  background-color: rgba(202, 230, 255, 0.3);
  border: 1px solid rgba(0, 100, 146, 0.2);
}

.calc-result--best:hover {
  box-shadow: 0 4px 16px rgba(0, 100, 146, 0.1);
}

.calc-result--other {
  background-color: var(--color-surface-container-low);
  border: 1px solid rgba(195, 198, 209, 0.1);
  opacity: 0.8;
}

.calc-result--other:hover {
  opacity: 1;
}

.calc-result__name {
  font-weight: 700;
  color: var(--color-primary);
  font-size: 1.125rem;
}

.calc-result__label {
  font-size: 0.625rem;
  font-weight: 700;
  color: var(--color-secondary);
  text-transform: uppercase;
  letter-spacing: -0.02em;
}

.calc-result__amount {
  font-size: 1.875rem;
  font-weight: 800;
  color: var(--color-primary);
}

.calc-result--other .calc-result__name {
  font-weight: 600;
}

.calc-result--other .calc-result__amount {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-on-surface-variant);
}

/* ---- Link Arrow ---- */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-secondary);
  font-weight: 700;
}

.link-arrow:hover {
  text-decoration: underline;
}

.link-arrow .material-symbols-outlined {
  font-size: var(--text-body-md);
  transition: transform var(--transition-fast);
}

.link-arrow:hover .material-symbols-outlined {
  transform: translateX(4px);
}

/* ---- Section Divider ---- */
.section-bar {
  height: 0.25rem;
  width: 3rem;
  background-color: var(--color-secondary-container);
  margin: 0 auto;
}

/* ---- Comparison Bar (data viz) ---- */
.comparison-bar {
  height: 4px;
  border-radius: var(--radius-full);
  background-color: var(--color-secondary-fixed-dim);
  overflow: hidden;
}

.comparison-bar__fill {
  height: 100%;
  background-color: var(--color-secondary);
  border-radius: var(--radius-full);
  transition: width var(--transition-normal);
}

/* ---- Alert / Warning Box ---- */
.alert {
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-lg);
  font-size: var(--text-body-md);
}

.alert--warning {
  background-color: var(--color-error-container);
  color: var(--color-on-error-container);
}

.alert--info {
  background-color: var(--color-secondary-fixed);
  color: var(--color-on-secondary-fixed);
}

/* ---- FAQ Accordion ---- */
.faq-item {
  border-bottom: 1px solid rgba(195, 198, 209, 0.2);
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: var(--space-6) 0;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-headline);
  font-size: var(--text-title-lg);
  font-weight: 600;
  color: var(--color-primary);
  background: none;
  border: none;
}

.faq-question .material-symbols-outlined {
  transition: transform var(--transition-fast);
  color: var(--color-on-surface-variant);
}

.faq-item.is-open .faq-question .material-symbols-outlined {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
}

.faq-item.is-open .faq-answer {
  max-height: 500px;
}

.faq-answer__inner {
  padding-bottom: var(--space-6);
  color: var(--color-on-surface-variant);
  font-size: var(--text-body-lg);
  line-height: var(--lh-body);
}

/* ---- Checklist ---- */
.checklist {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.checklist__item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.checklist__item .material-symbols-outlined {
  color: var(--color-secondary);
  font-size: 1.25rem;
  flex-shrink: 0;
  margin-top: 0.1em;
}