/* ==========================================================================
   Helico-Presto — Components
   Buttons, cards, nav, footer, forms, badges, accordion, lightbox, etc.
   ========================================================================== */

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 14px 24px;
  font-size: var(--font-size-ui);
  font-weight: 600;
  line-height: 1.25;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

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

.btn-dark {
  background: var(--color-text);
  color: var(--color-text-inverse);
}

.btn-dark:hover {
  background: #000000;
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 2px solid var(--color-text);
  padding: 12px 22px;
}

.btn-outline:hover {
  background: var(--color-text);
  color: var(--color-text-inverse);
}

.btn-outline-white {
  background: transparent;
  color: var(--color-text-inverse);
  border: 2px solid var(--color-text-inverse);
  padding: 12px 22px;
}

.btn-outline-white:hover {
  background: rgba(255, 255, 255, 0.15);
}

.btn-sm {
  padding: 10px 18px;
  font-size: var(--font-size-body);
}

.btn-lg {
  padding: 18px 32px;
  font-size: var(--font-size-body-lg);
}

.btn-icon {
  width: 48px;
  height: 48px;
  padding: 0;
  border-radius: var(--radius-circle);
  background: var(--color-bg-light);
  color: var(--color-text);
}

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

/* ---------- Cards ---------- */
.card {
  background: var(--color-bg);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.card-img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.card-body {
  padding: var(--space-lg);
}

.card-title {
  font-size: var(--font-size-h4);
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.card-text {
  font-size: var(--font-size-body);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

.card-price {
  font-size: var(--font-size-ui);
  font-weight: 700;
  color: var(--color-text);
}

.card-price span {
  font-weight: 400;
  color: var(--color-text-secondary);
}

.card-badge {
  display: inline-block;
  padding: 4px 12px;
  font-size: var(--font-size-tag);
  font-weight: 600;
  background: var(--color-bg-light);
  border-radius: 14px;
  margin-bottom: var(--space-sm);
}

/* Fleet card specs */
.card-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm) var(--space-md);
  margin-top: var(--space-md);
}

.card-specs dt {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
}

.card-specs dd {
  font-size: var(--font-size-body);
  font-weight: 600;
  color: var(--color-text);
}

/* Testimonial card */
.card-testimonial {
  padding: var(--space-xl);
}

.card-testimonial .card-quote {
  font-size: var(--font-size-ui);
  font-style: italic;
  line-height: 1.6;
  color: var(--color-text);
  margin-bottom: var(--space-lg);
}

.card-testimonial .card-quote::before {
  content: "\201C";
  font-size: 2rem;
  color: var(--color-primary);
  line-height: 0;
  vertical-align: -0.3em;
  margin-right: 4px;
}

.card-testimonial .card-author {
  font-size: var(--font-size-body);
  font-weight: 600;
}

.card-testimonial .card-stars {
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
  letter-spacing: 2px;
}

/* ---------- Navigation ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  background: transparent;
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.nav.scrolled {
  background: var(--color-bg);
  box-shadow: var(--shadow-sticky);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
  height: 72px;
}

.nav-logo img {
  height: 48px;
  width: auto;
  /* White on transparent hero nav */
  filter: brightness(0) invert(1);
  transition: filter var(--transition-base);
}

.nav.scrolled .nav-logo img {
  /* Dark on white scrolled nav */
  filter: none;
}

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

.nav-links a {
  font-size: var(--font-size-body);
  font-weight: 600;
  color: var(--color-text-inverse);
  transition: color var(--transition-fast);
  text-decoration: none;
  padding: var(--space-sm) 0;
  border-bottom: 2px solid transparent;
}

.nav.scrolled .nav-links a {
  color: var(--color-text);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

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

/* Language selector */
.lang-selector {
  position: relative;
}

.lang-selector-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-body);
  font-weight: 600;
  color: var(--color-text-inverse);
  background: transparent;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.nav.scrolled .lang-selector-toggle {
  color: var(--color-text);
  border-color: var(--color-border);
}

.lang-selector-toggle:hover {
  background: rgba(255,255,255,0.1);
}

.nav.scrolled .lang-selector-toggle:hover {
  background: var(--color-bg-light);
}

.lang-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 160px;
  background: var(--color-bg);
  border-radius: var(--radius-input);
  box-shadow: var(--shadow-elevated);
  padding: var(--space-sm) 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-fast);
  z-index: var(--z-overlay);
}

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

.lang-dropdown a {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-body);
  color: var(--color-text);
  text-decoration: none;
  transition: background var(--transition-fast);
}

.lang-dropdown a:hover {
  background: var(--color-bg-light);
}

.lang-dropdown a.active {
  font-weight: 600;
  color: var(--color-primary);
}

/* Hamburger */
.nav-hamburger {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  cursor: pointer;
  z-index: calc(var(--z-overlay) + 1);
}

.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-inverse);
  position: relative;
  transition: background var(--transition-fast);
}

.nav.scrolled .nav-hamburger span {
  background: var(--color-text);
}

.nav-hamburger span::before,
.nav-hamburger span::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 2px;
  background: inherit;
  left: 0;
  transition: transform var(--transition-base);
}

.nav-hamburger span::before { top: -7px; }
.nav-hamburger span::after { top: 7px; }

.nav-hamburger.open span {
  background: transparent;
}

.nav-hamburger.open span::before {
  transform: translateY(7px) rotate(45deg);
  background: var(--color-text);
}

.nav-hamburger.open span::after {
  transform: translateY(-7px) rotate(-45deg);
  background: var(--color-text);
}

/* Mobile nav overlay */
.nav-mobile {
  position: fixed;
  inset: 0;
  background: var(--color-bg);
  z-index: var(--z-overlay);
  padding: 96px var(--space-lg) var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  transform: translateX(100%);
  transition: transform var(--transition-base);
}

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

.nav-mobile a {
  display: block;
  padding: var(--space-md);
  font-size: var(--font-size-h4);
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border);
}

.nav-mobile a:hover,
.nav-mobile a.active {
  color: var(--color-primary);
}

/* ---------- Footer ---------- */
.footer {
  background: var(--color-footer);
  color: var(--color-text-inverse);
  padding: var(--space-4xl) 0 var(--space-lg);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
  gap: var(--space-2xl);
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--font-size-body);
  margin-top: var(--space-md);
  line-height: 1.6;
}

.footer-brand img {
  height: 43px;
  width: auto;
  filter: brightness(0) invert(1);
}

.footer h4 {
  font-size: var(--font-size-body);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--space-lg);
  color: var(--color-text-inverse);
}

.footer-links a {
  display: block;
  padding: 6px 0;
  font-size: var(--font-size-body);
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.footer-contact a {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 6px 0;
  font-size: var(--font-size-body);
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.footer-social {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-circle);
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text-inverse);
  text-decoration: none;
  transition: background var(--transition-fast);
  font-size: var(--font-size-body-lg);
}

.footer-social a:hover {
  background: var(--color-primary);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  text-align: center;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-lg);
  padding-right: var(--space-lg);
}

.footer-bottom p {
  font-size: var(--font-size-small);
  color: rgba(255, 255, 255, 0.5);
}

/* ---------- Trust Bar ---------- */
.trust-bar {
  background: var(--color-bg-alt);
  padding: var(--space-2xl) 0;
}

.trust-bar-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  text-align: center;
}

.trust-item {
  padding: var(--space-md);
}

.trust-item-icon {
  font-size: 2rem;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.trust-item-label {
  font-size: var(--font-size-body);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.trust-item-desc {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
}

/* ---------- Forms ---------- */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-size: var(--font-size-body);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 14px 16px;
  font-size: var(--font-size-ui);
  color: var(--color-text);
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-input);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 2px rgba(34, 34, 34, 0.1);
}

.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: var(--color-error);
  box-shadow: 0 0 0 2px rgba(193, 53, 21, 0.1);
}

.form-error {
  font-size: var(--font-size-small);
  color: var(--color-error);
  margin-top: var(--space-xs);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236A6A6A' stroke-width='2' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 44px;
}

::placeholder {
  color: var(--color-text-tertiary);
}

/* ---------- Badge ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  font-size: var(--font-size-tag);
  font-weight: 600;
  border-radius: 14px;
  background: var(--color-bg-light);
  color: var(--color-text);
}

.badge-trust {
  background: rgba(0, 138, 5, 0.1);
  color: var(--color-trust);
}

.badge-primary {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

/* ---------- Accordion (FAQ) ---------- */
.accordion-item {
  border-bottom: 1px solid var(--color-border);
}

.accordion-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-lg) 0;
  font-size: var(--font-size-ui);
  font-weight: 600;
  color: var(--color-text);
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
}

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

.accordion-arrow {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  transition: transform var(--transition-base);
}

.accordion-item.open .accordion-arrow {
  transform: rotate(180deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}

.accordion-content-inner {
  padding-bottom: var(--space-lg);
  font-size: var(--font-size-body);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  background: rgba(0, 0, 0, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.lightbox.open {
  opacity: 1;
  visibility: visible;
}

.lightbox img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius-md);
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-circle);
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text-inverse);
  border: none;
  cursor: pointer;
  font-size: 1.5rem;
  transition: background var(--transition-fast);
}

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
  background: rgba(255, 255, 255, 0.25);
}

.lightbox-close {
  top: var(--space-lg);
  right: var(--space-lg);
}

.lightbox-prev {
  left: var(--space-lg);
  top: 50%;
  transform: translateY(-50%);
}

.lightbox-next {
  right: var(--space-lg);
  top: 50%;
  transform: translateY(-50%);
}

/* ---------- Promo Banner ---------- */
.promo-banner {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: 10px var(--space-lg);
  text-align: center;
  font-size: var(--font-size-body);
  font-weight: 600;
  position: relative;
  z-index: var(--z-promo);
}

.promo-banner a {
  color: var(--color-text-inverse);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.promo-banner-close {
  position: absolute;
  right: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--color-text-inverse);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 4px;
  opacity: 0.8;
}

.promo-banner-close:hover {
  opacity: 1;
}

/* ---------- WhatsApp Floating Button ---------- */
.whatsapp-float {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  z-index: var(--z-whatsapp);
  width: 56px;
  height: 56px;
  border-radius: var(--radius-circle);
  background: var(--color-whatsapp);
  color: var(--color-text-inverse);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  text-decoration: none;
  font-size: 1.75rem;
}

.whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.whatsapp-float svg {
  width: 28px;
  height: 28px;
  fill: currentColor;
}

@keyframes pulse-ring {
  0% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.4); }
  70% { box-shadow: 0 0 0 12px rgba(37, 211, 102, 0); }
  100% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0); }
}

.whatsapp-float {
  animation: pulse-ring 3s infinite;
}

/* ---------- Hero Section ---------- */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--color-text-inverse);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg video,
.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0.3) 0%, rgba(0,0,0,0.5) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  padding: var(--space-lg);
}

.hero-content h1 {
  color: var(--color-text-inverse);
  margin-bottom: var(--space-md);
}

.hero-content p {
  font-size: var(--font-size-body-lg);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-xl);
}

.hero-ctas {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* Page hero (shorter, for inner pages) */
.hero-page {
  min-height: 50vh;
}

/* ---------- CTA Banner ---------- */
.cta-banner {
  position: relative;
  padding: var(--space-4xl) 0;
  text-align: center;
  color: var(--color-text-inverse);
  overflow: hidden;
}

.cta-banner-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.cta-banner-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.cta-banner-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1;
}

.cta-banner-content {
  position: relative;
  z-index: 2;
}

.cta-banner h2 {
  color: var(--color-text-inverse);
  margin-bottom: var(--space-md);
}

.cta-banner p {
  font-size: var(--font-size-body-lg);
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: var(--space-xl);
}

/* ---------- Pricing Table ---------- */
.pricing-grid {
  display: grid;
  gap: var(--space-lg);
}

.pricing-card {
  background: var(--color-bg);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: var(--space-xl);
  text-align: center;
}

.pricing-card h3 {
  margin-bottom: var(--space-md);
}

.pricing-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
}

.pricing-row:last-child {
  border-bottom: none;
}

.pricing-row-label {
  font-size: var(--font-size-body);
  color: var(--color-text-secondary);
}

.pricing-row-value {
  font-size: var(--font-size-ui);
  font-weight: 700;
  color: var(--color-text);
}

/* ---------- Steps (How it works) ---------- */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  text-align: center;
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-circle);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-size: var(--font-size-h4);
  font-weight: 700;
  margin: 0 auto var(--space-md);
}

/* ---------- Specs Table ---------- */
.specs-table {
  width: 100%;
}

.specs-table tr {
  border-bottom: 1px solid var(--color-border);
}

.specs-table td {
  padding: var(--space-md) 0;
  font-size: var(--font-size-body);
}

.specs-table td:first-child {
  color: var(--color-text-secondary);
  padding-right: var(--space-lg);
}

.specs-table td:last-child {
  font-weight: 600;
  text-align: right;
}

/* ---------- Photo Grid ---------- */
.photo-grid {
  display: grid;
  gap: var(--space-md);
}

.photo-grid-item {
  border-radius: var(--radius-input);
  overflow: hidden;
  cursor: pointer;
  transition: transform var(--transition-base);
}

.photo-grid-item:hover {
  transform: scale(1.02);
}

.photo-grid-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

/* ---------- Checklist ---------- */
.checklist {
  list-style: none;
}

.checklist li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  font-size: var(--font-size-body);
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}

.checklist li::before {
  content: "✓";
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: var(--radius-circle);
  background: rgba(0, 138, 5, 0.1);
  color: var(--color-trust);
  font-weight: 700;
  font-size: var(--font-size-small);
}

/* ---------- Icon (inline SVG helpers) ---------- */
.icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1em;
  height: 1em;
  fill: currentColor;
  flex-shrink: 0;
}