/* ============================================
   components.css — Nav, Footer, Cards, Tables, Accordions
   ============================================ */

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  padding: 0 var(--space-sm);
  transition: background-color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}

.nav--scrolled {
  background-color: rgba(255, 255, 255, 0.97);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.nav__inner {
  width: 100%;
  max-width: var(--max-width-wide);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--saffron);
  text-decoration: none;
  letter-spacing: -0.02em;
  z-index: 1001;
}

@media (min-width: 768px) {
  .nav__logo {
    font-size: 2rem;
  }
}

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

.nav__link {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--earth);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color var(--duration-fast) var(--ease-out);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--saffron);
  transition: width var(--duration-fast) var(--ease-out);
}

.nav__link:hover::after,
.nav__link--active::after {
  width: 100%;
}

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

/* Nav on dark heroes */
.nav--transparent .nav__link {
  color: var(--white);
}

.nav--transparent .nav__link:hover {
  color: var(--saffron-light);
}

.nav--transparent.nav--scrolled .nav__link {
  color: var(--earth);
}

.nav--transparent.nav--scrolled .nav__link:hover {
  color: var(--saffron);
}

@media (min-width: 768px) {
  .nav {
    padding: 0 var(--space-md);
  }

  .nav__links {
    display: flex;
  }

  .nav__hamburger {
    display: none;
  }
}

/* --- Hamburger --- */
.nav__hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  cursor: pointer;
  z-index: 1001;
  background: none;
  border: none;
  padding: 0;
}

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

.nav__hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--earth);
  transition: all var(--duration-fast) var(--ease-out);
  border-radius: 1px;
}

.nav--transparent .nav__hamburger span {
  background: var(--white);
}

.nav--scrolled .nav__hamburger span {
  background: var(--earth);
}

.nav__hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav__hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav__hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Mobile Menu Overlay --- */
.mobile-menu {
  position: fixed;
  inset: 0;
  background: var(--white);
  z-index: 999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  transform: translateX(100%);
  transition: transform var(--duration-normal) var(--ease-out);
}

.mobile-menu.is-open {
  transform: translateX(0);
}

.mobile-menu__link {
  font-family: var(--font-serif);
  font-size: 2rem;
  color: var(--earth);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

.mobile-menu__link:hover {
  color: var(--saffron);
}

/* --- Cards --- */
.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card__icon {
  width: 56px;
  height: 56px;
  margin-bottom: var(--space-sm);
  color: var(--saffron);
}

.card__title {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--earth);
}

.card__body {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--slate);
}

.card--bordered {
  box-shadow: none;
  border: 1px solid rgba(0, 0, 0, 0.08);
}

.card--dark {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.card--dark:hover {
  background: rgba(255, 255, 255, 0.08);
  box-shadow: none;
}

.card--dark .card__title {
  color: var(--white);
}

.card--dark .card__body {
  color: rgba(255, 255, 255, 0.7);
}

/* --- Stats --- */
.stat {
  text-align: center;
  padding: var(--space-md);
}

.stat__number {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 300;
  color: var(--saffron);
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.stat__label {
  font-size: 0.9375rem;
  color: var(--slate);
  max-width: 200px;
  margin: 0 auto;
}

.section--dark .stat__number {
  color: var(--saffron-light);
}

.section--dark .stat__label {
  color: rgba(255, 255, 255, 0.7);
}

/* --- Accordion --- */
.accordion {
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.accordion__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) 0;
  font-family: var(--font-sans);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--earth);
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  gap: var(--space-sm);
}

.accordion__trigger:hover {
  color: var(--saffron);
}

.accordion__icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  transition: transform var(--duration-fast) var(--ease-out);
}

.accordion__trigger[aria-expanded="true"] .accordion__icon {
  transform: rotate(180deg);
}

.accordion__panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--duration-normal) var(--ease-out);
}

.accordion__panel.is-open {
  max-height: 2000px;
}

.accordion__content {
  padding-bottom: var(--space-md);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--slate);
}

/* --- Tables --- */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.table th {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.8125rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--slate);
  text-align: left;
  padding: var(--space-xs) var(--space-sm);
  border-bottom: 2px solid var(--earth);
}

.table td {
  padding: var(--space-xs) var(--space-sm);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  vertical-align: top;
}

.table tr:hover td {
  background: var(--cream);
}

/* --- Patent Card --- */
.patent-card {
  background: var(--cream);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  border-left: 4px solid var(--saffron);
}

.patent-card__label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--saffron);
  margin-bottom: var(--space-2xs);
}

.patent-card__title {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  color: var(--earth);
  margin-bottom: var(--space-xs);
}

.patent-card__meta {
  font-size: 0.8125rem;
  color: var(--slate);
  font-family: var(--font-sans);
}

/* --- Step --- */
.step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-sm);
  align-items: start;
  padding: var(--space-md) 0;
}

.step__number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--saffron);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  flex-shrink: 0;
}

.step__title {
  font-family: var(--font-sans);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--earth);
  margin-bottom: var(--space-2xs);
}

.step__body {
  font-size: 1rem;
  color: var(--slate);
  line-height: 1.7;
}

/* --- Badge --- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  padding: var(--space-2xs) var(--space-xs);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  background: var(--cream);
  color: var(--ochre);
}

/* --- Footer --- */
.footer {
  background: var(--earth);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-2xl) var(--space-sm) var(--space-lg);
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 768px) {
  .footer {
    padding: var(--space-2xl) var(--space-md) var(--space-lg);
  }

  .footer__inner {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

.footer__brand {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--saffron);
  margin-bottom: var(--space-xs);
}

.footer__tagline {
  font-size: 0.9375rem;
  margin-bottom: var(--space-sm);
  color: rgba(255, 255, 255, 0.5);
}

.footer__heading {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: var(--space-sm);
}

.footer__link {
  display: block;
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  padding: var(--space-2xs) 0;
  transition: color var(--duration-fast) var(--ease-out);
}

.footer__link:hover {
  color: var(--saffron);
}

.footer__bottom {
  max-width: var(--max-width);
  margin: var(--space-lg) auto 0;
  padding-top: var(--space-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.4);
}

@media (min-width: 768px) {
  .footer__bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* --- Form --- */
.form__group {
  margin-bottom: var(--space-sm);
}

.form__label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--space-2xs);
  color: var(--earth);
}

.form__input,
.form__textarea,
.form__select {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  border: 1.5px solid rgba(0, 0, 0, 0.12);
  border-radius: var(--radius-md);
  background: var(--white);
  color: var(--earth);
  transition: border-color var(--duration-fast) var(--ease-out);
}

.form__input:focus,
.form__textarea:focus,
.form__select:focus {
  outline: none;
  border-color: var(--saffron);
}

.form__textarea {
  min-height: 150px;
  resize: vertical;
}

/* --- Placeholder Image --- */
.placeholder-img {
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
  font-style: italic;
  overflow: hidden;
}

.placeholder-img--field {
  background: linear-gradient(135deg, var(--leaf-dark) 0%, var(--leaf) 50%, #5ca468 100%);
}

.placeholder-img--sky {
  background: linear-gradient(135deg, var(--sky-dark) 0%, var(--sky) 50%, #2d6a8a 100%);
}

.placeholder-img--earth {
  background: linear-gradient(135deg, var(--earth) 0%, #5a4540 50%, var(--ochre) 100%);
}

.placeholder-img--saffron {
  background: linear-gradient(135deg, var(--ochre) 0%, var(--saffron) 50%, #f0944f 100%);
}