/* ========================================
   REVSTAY — Components
   Nav, Footer, Buttons, Cards, Sections
   ======================================== */

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.875rem 2rem;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  border: 2px solid transparent;
  border-radius: var(--border-radius-pill);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  line-height: 1;
  white-space: nowrap;
}

.btn:hover {
  transform: scale(1.02);
}

.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.btn--primary:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-white);
  border-color: var(--color-white);
}

.btn--ghost:hover {
  background-color: rgba(255, 255, 255, 0.1);
  box-shadow: 0 0 20px rgba(255, 255, 255, 0.1);
}

.btn--ghost-dark {
  background-color: transparent;
  color: var(--color-text-dark);
  border-color: var(--color-text-dark);
}

.btn--ghost-dark:hover {
  background-color: var(--color-dark);
  color: var(--color-white);
}

.btn--white {
  background-color: var(--color-white);
  color: var(--color-primary);
  border-color: var(--color-white);
}

.btn--white:hover {
  background-color: var(--color-sand);
  border-color: var(--color-sand);
}

.btn--sm {
  padding: 0.625rem 1.25rem;
  font-size: var(--text-xs);
}

.btn--lg {
  padding: 1rem 2.5rem;
  font-size: var(--text-base);
}

.text-link {
  color: var(--color-primary);
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

.text-link--white {
  color: var(--color-white);
}

.text-link--white:hover {
  color: var(--color-sand);
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  transition: all var(--transition-base);
}

.nav--solid {
  background-color: var(--color-dark);
  box-shadow: var(--shadow-md);
}

.nav--hidden {
  transform: translateY(-100%);
}

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

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-white);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.5rem;
  text-decoration: none;
}

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

.nav__logo .logo-rev {
  color: var(--color-primary);
}

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

.nav__link {
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

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

/* Dropdown */
.nav__dropdown {
  position: relative;
}

.nav__dropdown-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--text-sm);
  font-weight: 500;
  font-family: var(--font-body);
  transition: color var(--transition-fast);
}

.nav__dropdown-toggle:hover {
  color: var(--color-white);
}

.nav__dropdown-toggle svg {
  width: 12px;
  height: 12px;
  transition: transform var(--transition-fast);
}

.nav__dropdown:hover .nav__dropdown-toggle svg {
  transform: rotate(180deg);
}

.nav__dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  min-width: 180px;
  background-color: var(--color-white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  padding: var(--space-sm) 0;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  margin-top: var(--space-sm);
}

.nav__dropdown:hover .nav__dropdown-menu {
  opacity: 1;
  visibility: visible;
}

.nav__dropdown-item {
  display: block;
  padding: var(--space-sm) var(--space-lg);
  color: var(--color-text-dark);
  font-size: var(--text-sm);
  transition: background-color var(--transition-fast);
}

.nav__dropdown-item:hover {
  background-color: var(--color-sand);
  color: var(--color-primary);
}

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

.nav__lang-toggle {
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: rgba(255, 255, 255, 0.85);
  padding: 0.375rem 0.75rem;
  border-radius: var(--border-radius);
  font-size: var(--text-xs);
  cursor: pointer;
  font-family: var(--font-body);
  transition: all var(--transition-fast);
}

.nav__lang-toggle:hover {
  border-color: var(--color-white);
  color: var(--color-white);
}

/* Mobile Menu Toggle */
.nav__hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-white);
  margin: 5px 0;
  transition: all var(--transition-base);
}

.nav__hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav__hamburger.active span:nth-child(2) {
  opacity: 0;
}

.nav__hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu Overlay */
.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 100%;
  max-width: 360px;
  height: 100vh;
  background-color: var(--color-dark);
  z-index: 999;
  transition: right var(--transition-base);
  padding: calc(var(--nav-height) + var(--space-xl)) var(--space-xl) var(--space-xl);
  display: flex;
  flex-direction: column;
}

.mobile-menu.open {
  right: 0;
}

.mobile-menu__overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.mobile-menu__overlay.open {
  opacity: 1;
  visibility: visible;
}

.mobile-menu__link {
  display: block;
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--text-lg);
  font-weight: 500;
  padding: var(--space-md) 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: color var(--transition-fast);
}

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

.mobile-menu__sub-link {
  display: block;
  color: rgba(255, 255, 255, 0.6);
  font-size: var(--text-base);
  padding: var(--space-sm) 0 var(--space-sm) var(--space-lg);
}

.mobile-menu__cta {
  margin-top: auto;
  padding-top: var(--space-xl);
}

@media (max-width: 1024px) {
  .nav__links,
  .nav__actions {
    display: none;
  }

  .nav__hamburger {
    display: block;
  }
}

/* --- Cards --- */
.card {
  background-color: var(--color-white);
  border-radius: var(--border-radius-lg);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-fast);
}

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

.card--stat {
  text-align: center;
  padding: var(--space-2xl);
}

.card--stat .stat-number {
  font-family: var(--font-heading);
  font-size: var(--text-stat);
  font-weight: 800;
  color: var(--color-text-dark);
  line-height: 1;
  margin-bottom: var(--space-sm);
}

.card--stat .stat-label {
  font-size: var(--text-sm);
  color: var(--color-text);
}

/* Feature Card */
.card--feature {
  text-align: center;
  padding: var(--space-2xl) var(--space-xl);
}

.card--feature .card__icon {
  width: 56px;
  height: 56px;
  background-color: rgba(27, 158, 140, 0.1);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-lg);
}

.card--feature .card__icon svg {
  width: 28px;
  height: 28px;
  color: var(--color-primary);
}

.card--feature h4 {
  margin-bottom: var(--space-sm);
}

/* Pricing Card */
.card--pricing {
  border: 1px solid rgba(26, 46, 43, 0.1);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.card--pricing.highlighted {
  border-color: var(--color-primary);
  border-width: 2px;
  transform: scale(1.03);
  box-shadow: var(--shadow-lg);
}

.card--pricing.highlighted::before {
  content: 'Most Popular';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--color-primary);
  color: var(--color-white);
  text-align: center;
  padding: var(--space-xs) 0;
  font-size: var(--text-xs);
  font-weight: 600;
}

.card--pricing.highlighted {
  padding-top: calc(var(--space-2xl) + 1.5rem);
}

.pricing__tier {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text-dark);
  margin-bottom: var(--space-xs);
}

.pricing__price {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text-dark);
}

.pricing__price span {
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-text);
}

.pricing__best-for {
  font-size: var(--text-sm);
  color: var(--color-text);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid rgba(26, 46, 43, 0.1);
}

.pricing__features {
  flex: 1;
  margin-bottom: var(--space-xl);
}

.pricing__features li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  font-size: var(--text-sm);
}

.pricing__features li::before {
  content: '✓';
  color: var(--color-primary);
  font-weight: 700;
  flex-shrink: 0;
}

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--nav-height) + var(--space-2xl)) var(--space-lg) var(--space-2xl);
  position: relative;
}

.hero--compact {
  min-height: auto;
  padding: calc(var(--nav-height) + var(--space-4xl)) var(--space-lg) var(--space-3xl);
}

.hero__content {
  max-width: var(--max-width-narrow);
  text-align: center;
}

.hero__subtitle {
  font-size: var(--text-lg);
  color: var(--color-sand);
  margin-top: var(--space-lg);
  margin-bottom: var(--space-lg);
  line-height: 1.6;
}

.hero__proof {
  font-size: var(--text-base);
  color: var(--color-primary);
  margin-bottom: var(--space-2xl);
}

.hero__ctas {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-2xl);
}

.hero__trust {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.5);
}

.hero__trust span {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

/* --- Timeline --- */
.timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 28px;
  left: calc(12.5% + 16px);
  right: calc(12.5% + 16px);
  height: 2px;
  background-color: var(--color-primary);
  opacity: 0.3;
}

.timeline__step {
  text-align: center;
  position: relative;
}

.timeline__number {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-lg);
  position: relative;
  z-index: 1;
}

.timeline__step h4 {
  margin-bottom: var(--space-sm);
}

.timeline__step p {
  font-size: var(--text-sm);
  color: var(--color-text);
}

@media (max-width: 768px) {
  .timeline {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
    padding-left: var(--space-3xl);
  }

  .timeline::before {
    top: 0;
    bottom: 0;
    left: 28px;
    right: auto;
    width: 2px;
    height: auto;
  }

  .timeline__step {
    text-align: left;
  }

  .timeline__number {
    position: absolute;
    left: calc(-1 * var(--space-3xl));
    margin: 0;
    width: 48px;
    height: 48px;
  }
}

/* --- Testimonial --- */
.testimonial {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
  text-align: center;
}

.testimonial__quote {
  font-size: var(--text-lg);
  font-style: italic;
  line-height: 1.7;
  margin-bottom: var(--space-lg);
  position: relative;
}

.testimonial__quote::before {
  content: '"';
  font-family: var(--font-heading);
  font-size: 4rem;
  color: var(--color-primary);
  position: absolute;
  top: -1.5rem;
  left: -0.5rem;
  opacity: 0.5;
}

.testimonial__attribution {
  font-size: var(--text-sm);
  color: var(--color-primary);
  font-weight: 500;
}

/* --- Stats Row --- */
.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  text-align: center;
  margin-top: var(--space-3xl);
}

.stats-row .stat-number {
  font-family: var(--font-heading);
  font-size: var(--text-stat);
  font-weight: 800;
  color: var(--color-white);
  line-height: 1;
  margin-bottom: var(--space-sm);
}

.stats-row .stat-label {
  font-size: var(--text-sm);
  color: var(--color-sand);
}

@media (max-width: 768px) {
  .stats-row {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }
}

/* --- Footer --- */
.footer {
  background-color: var(--color-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-4xl) 0 0;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-3xl);
}

.footer__brand p {
  font-size: var(--text-sm);
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.6);
}

.footer__brand .nav__logo {
  margin-bottom: var(--space-md);
}

.footer h5 {
  color: var(--color-white);
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-lg);
}

.footer__link {
  display: block;
  padding: var(--space-xs) 0;
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--transition-fast);
}

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

/* Newsletter */
.footer__newsletter {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--space-2xl) 0;
  margin-bottom: var(--space-xl);
}

.footer__newsletter-form {
  display: flex;
  gap: var(--space-sm);
  max-width: 440px;
  margin-top: var(--space-md);
}

.footer__newsletter-form input {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--border-radius-pill);
  background: transparent;
  color: var(--color-white);
  font-size: var(--text-sm);
}

.footer__newsletter-form input::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

/* Partners */
.footer__partners {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--space-xl) 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xl);
  flex-wrap: wrap;
}

.footer__partner-badge {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.4);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Bottom bar */
.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--space-lg) 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.4);
}

.footer__bottom a {
  transition: color var(--transition-fast);
}

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

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

  .footer__bottom {
    justify-content: center;
    text-align: center;
  }
}

/* --- FAQ Accordion --- */
.faq-group__title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-lg);
  color: var(--color-text-dark);
}

.accordion {
  border-bottom: 1px solid rgba(26, 46, 43, 0.1);
}

.accordion__trigger {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-lg) 0;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text-dark);
  text-align: left;
}

.accordion__trigger svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--color-text);
  transition: transform var(--transition-base);
}

.accordion__trigger.active svg {
  transform: rotate(180deg);
}

.accordion__content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
}

.accordion__content-inner {
  padding: 0 0 var(--space-lg);
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: 1.7;
}

/* --- Floating Chat Widget --- */
.chat-widget {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  z-index: 900;
}

.chat-widget__toggle {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-fast);
}

.chat-widget__toggle:hover {
  background-color: var(--color-primary-hover);
  transform: scale(1.05);
}

.chat-widget__toggle svg {
  width: 28px;
  height: 28px;
}

.chat-widget__options {
  position: absolute;
  bottom: calc(100% + var(--space-md));
  right: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-base);
}

.chat-widget__options.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.chat-widget__option {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background-color: var(--color-white);
  border-radius: var(--border-radius-pill);
  box-shadow: var(--shadow-md);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-dark);
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.chat-widget__option:hover {
  box-shadow: var(--shadow-lg);
  transform: translateX(-4px);
}

.chat-widget__option svg {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

/* --- Two-Column Layout --- */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

@media (max-width: 768px) {
  .two-col {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }
}

/* --- Before/After Panel (Case Study) --- */
.before-after {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

.before-after__panel {
  padding: var(--space-2xl);
  border-radius: var(--border-radius-lg);
}

.before-after__panel--before {
  background-color: rgba(255, 255, 255, 0.05);
}

.before-after__panel--after {
  background-color: rgba(27, 158, 140, 0.15);
  border: 1px solid rgba(27, 158, 140, 0.3);
}

@media (max-width: 768px) {
  .before-after {
    grid-template-columns: 1fr;
  }
}

/* --- Comparison Table (Pricing) --- */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.comparison-table th,
.comparison-table td {
  padding: var(--space-md) var(--space-lg);
  text-align: left;
  border-bottom: 1px solid rgba(26, 46, 43, 0.08);
}

.comparison-table th {
  font-weight: 600;
  color: var(--color-text-dark);
  background-color: var(--color-sand);
  position: sticky;
  top: var(--nav-height);
  z-index: 10;
}

.comparison-table td:first-child {
  font-weight: 500;
  color: var(--color-text-dark);
}

.comparison-table .group-row td {
  font-weight: 700;
  color: var(--color-text-dark);
  background-color: rgba(26, 46, 43, 0.03);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding-top: var(--space-lg);
}

.comparison-table .check {
  color: var(--color-primary);
  font-weight: 700;
}

.comparison-table .highlight-col {
  background-color: rgba(27, 158, 140, 0.04);
}

/* Responsive table */
@media (max-width: 768px) {
  .comparison-table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .comparison-table {
    min-width: 600px;
  }
}