/* ==========================================================================
   ThaiTCar — Shared Styles
   Modern responsive travel transfer website
   ========================================================================== */

:root {
  /* Brand */
  --color-primary: #0b3d4a;
  --color-primary-dark: #072f39;
  --color-primary-light: #145868;
  --color-accent: #e85d04;
  --color-accent-hover: #d04f00;
  --color-accent-soft: #fff1e6;
  --color-gold: #c9a227;

  /* Neutrals */
  --color-bg: #f7f5f2;
  --color-surface: #ffffff;
  --color-surface-alt: #eef4f6;
  --color-text: #1c2a30;
  --color-text-muted: #5b6b72;
  --color-border: #d9e2e6;
  --color-overlay: rgba(7, 31, 40, 0.72);

  /* Typography */
  --font-sans: "Segoe UI", "PingFang TC", "Microsoft JhengHei", "Noto Sans TC",
    Arial, sans-serif;
  --font-display: "Segoe UI", "PingFang TC", "Microsoft JhengHei", sans-serif;
  --fs-xs: 0.8125rem;
  --fs-sm: 0.9375rem;
  --fs-base: 1rem;
  --fs-md: 1.125rem;
  --fs-lg: 1.375rem;
  --fs-xl: 1.75rem;
  --fs-2xl: 2.25rem;
  --fs-3xl: clamp(2rem, 4vw, 3rem);
  --lh-tight: 1.25;
  --lh-base: 1.65;
  --fw-regular: 400;
  --fw-medium: 600;
  --fw-bold: 700;

  /* Layout */
  --container: 1140px;
  --header-h: 76px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 999px;
  --shadow-sm: 0 4px 14px rgba(11, 61, 74, 0.08);
  --shadow-md: 0 12px 32px rgba(11, 61, 74, 0.12);
  --shadow-lg: 0 20px 48px rgba(11, 61, 74, 0.18);
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4.5rem;
  --transition: 0.28s ease;
  --z-header: 1000;
  --z-overlay: 1100;
  --z-top: 1200;
}

/* Reset */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-primary-light);
  text-decoration: none;
  transition: color var(--transition), background var(--transition),
    transform var(--transition), box-shadow var(--transition);
}

a:hover {
  color: var(--color-accent);
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 var(--space-3);
  font-family: var(--font-display);
  line-height: var(--lh-tight);
  color: var(--color-primary);
  font-weight: var(--fw-bold);
}

p {
  margin: 0 0 var(--space-4);
}

button,
input,
select,
textarea {
  font: inherit;
}

:focus-visible {
  outline: 3px solid rgba(232, 93, 4, 0.45);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-accent);
  color: #fff;
  padding: var(--space-2) var(--space-4);
  z-index: var(--z-top);
}

.skip-link:focus {
  left: var(--space-4);
  top: var(--space-4);
}

.container {
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
}

.section {
  padding: var(--space-8) 0;
}

.section--alt {
  background: var(--color-surface);
}

.section--dark {
  background: linear-gradient(135deg, var(--color-primary), #104d5c);
  color: #fff;
}

.section--dark h2,
.section--dark h3 {
  color: #fff;
}

.section__header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto var(--space-7);
}

.section__eyebrow {
  display: inline-block;
  margin-bottom: var(--space-3);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-pill);
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.section__title {
  font-size: var(--fs-2xl);
  margin-bottom: var(--space-3);
}

.section__desc {
  color: var(--color-text-muted);
  margin-bottom: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 48px;
  padding: 0.75rem 1.4rem;
  border-radius: var(--radius-pill);
  border: 2px solid transparent;
  font-weight: var(--fw-medium);
  cursor: pointer;
  text-align: center;
}

.btn--primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 10px 24px rgba(232, 93, 4, 0.28);
}

.btn--primary:hover {
  background: var(--color-accent-hover);
  color: #fff;
  transform: translateY(-2px);
}

.btn--secondary {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.7);
}

.btn--secondary:hover {
  background: #fff;
  color: var(--color-primary);
}

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

.btn--outline:hover {
  background: var(--color-primary);
  color: #fff;
}

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

.btn--ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* Top bar + Header */
.topbar {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--fs-xs);
}

.topbar__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: 0.55rem 0;
}

.topbar__contacts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
}

.topbar a {
  color: rgba(255, 255, 255, 0.92);
}

.topbar a:hover {
  color: #ffd9b8;
}

.topbar__social {
  display: flex;
  gap: 0.75rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-sm);
  border-bottom-color: var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  gap: var(--space-4);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-primary);
}

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

.brand__mark {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(145deg, var(--color-accent), #f48c06);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: var(--fw-bold);
  box-shadow: var(--shadow-sm);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand__name {
  font-size: 1.15rem;
  font-weight: var(--fw-bold);
}

.brand__tag {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

.nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: var(--color-surface);
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-primary);
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.site-nav__link {
  display: inline-flex;
  padding: 0.55rem 0.85rem;
  border-radius: var(--radius-pill);
  color: var(--color-text);
  font-weight: var(--fw-medium);
  font-size: var(--fs-sm);
}

.site-nav__link:hover,
.site-nav__link.is-active {
  color: var(--color-accent);
  background: var(--color-accent-soft);
}

.nav-backdrop {
  display: none;
}

/* Hero */
.hero {
  position: relative;
  min-height: clamp(420px, 72vh, 640px);
  display: grid;
  align-items: end;
  color: #fff;
  overflow: hidden;
  background: var(--color-primary-dark) center / cover no-repeat;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    120deg,
    rgba(7, 31, 40, 0.88) 10%,
    rgba(11, 61, 74, 0.55) 55%,
    rgba(232, 93, 4, 0.28) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 1;
  padding: var(--space-8) 0 calc(var(--space-8) + 0.5rem);
  max-width: 720px;
}

.hero__title {
  color: #fff;
  font-size: var(--fs-3xl);
  margin-bottom: var(--space-4);
}

.hero__subtitle {
  font-size: var(--fs-md);
  color: rgba(255, 255, 255, 0.92);
  margin-bottom: var(--space-5);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.page-hero {
  position: relative;
  padding: var(--space-8) 0;
  color: #fff;
  background: var(--color-primary) center / cover no-repeat;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    115deg,
    rgba(7, 31, 40, 0.88),
    rgba(11, 61, 74, 0.65)
  );
}

.page-hero__content {
  position: relative;
  z-index: 1;
  max-width: 760px;
}

.page-hero h1 {
  color: #fff;
  font-size: var(--fs-3xl);
}

.page-hero p {
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 0;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: var(--space-4);
  font-size: var(--fs-xs);
  color: rgba(255, 255, 255, 0.75);
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.9);
}

.breadcrumb span {
  opacity: 0.6;
}

/* Cards / grids */
.grid {
  display: grid;
  gap: var(--space-5);
}

.grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid--4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(217, 226, 230, 0.8);
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.card__media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--color-surface-alt);
}

.card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.card:hover .card__media img {
  transform: scale(1.05);
}

.card__body {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1;
}

.card__body h3 {
  margin: 0;
  font-size: var(--fs-lg);
}

.card__body p {
  margin: 0;
  color: var(--color-text-muted);
  flex: 1;
}

.feature-list {
  display: grid;
  gap: var(--space-4);
}

.feature-item {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  padding: var(--space-5);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.feature-item__icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-weight: var(--fw-bold);
}

.cta-banner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #123f4b, #0b3d4a 55%, #c2410c);
  color: #fff;
  box-shadow: var(--shadow-md);
}

.cta-banner h2,
.cta-banner p {
  color: #fff;
  margin: 0;
}

.cta-banner p {
  margin-top: var(--space-2);
  opacity: 0.92;
}

.media-split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: var(--space-7);
  align-items: center;
}

.media-stack {
  display: grid;
  gap: var(--space-4);
}

.media-stack img,
.rounded-media {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  width: 100%;
  object-fit: cover;
}

.fleet-grid .card__media {
  aspect-ratio: auto;
  height: auto;
  overflow: visible;
  background: #fff;
}

.fleet-grid .card__media img {
  width: 100%;
  height: auto;
  object-fit: contain;
  display: block;
  padding: 0;
}

.fleet-grid .card:hover .card__media img {
  transform: none;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-5);
}

.gallery-item {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.gallery-grid .gallery-item {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.gallery-item__link {
  display: block;
  position: relative;
  overflow: hidden;
  cursor: zoom-in;
}

.gallery-item__link::after {
  content: "放大";
  position: absolute;
  right: 0.75rem;
  bottom: 0.75rem;
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius-pill);
  background: rgba(7, 31, 40, 0.72);
  color: #fff;
  font-size: var(--fs-xs);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}

.gallery-item__link:hover::after,
.gallery-item__link:focus-visible::after {
  opacity: 1;
}

.gallery-item img {
  width: 100%;
  max-height: 640px;
  object-fit: cover;
  object-position: center top;
}

.gallery-grid .gallery-item img {
  height: 360px;
  max-height: none;
  transition: transform 0.45s ease;
}

.gallery-item__link:hover img {
  transform: scale(1.04);
}

.gallery-item__caption {
  padding: var(--space-5);
}

.gallery-grid .gallery-item__caption {
  flex: 1;
}

.gallery-item__caption h3 {
  font-size: var(--fs-md);
  margin-bottom: 0;
}

.gallery-item--text-only .gallery-item__caption {
  display: flex;
  align-items: center;
  min-height: 200px;
}

.fleet-gallery {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-4);
}

.fleet-gallery .gallery-item img {
  height: 180px;
  max-height: none;
  transition: transform 0.45s ease;
}

@media (max-width: 1024px) {
  .fleet-gallery {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .fleet-gallery .gallery-item img {
    height: 220px;
  }
}

@media (max-width: 560px) {
  .fleet-gallery {
    grid-template-columns: 1fr;
  }

  .fleet-gallery .gallery-item img {
    height: 240px;
  }
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-top) + 10);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  background: rgba(6, 31, 38, 0.88);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}

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

.lightbox__dialog {
  position: relative;
  max-width: min(96vw, 1100px);
  max-height: 90vh;
  outline: none;
}

.lightbox__img {
  display: block;
  max-width: 96vw;
  max-height: 82vh;
  width: auto;
  height: auto;
  margin: 0 auto;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  object-fit: contain;
  background: #000;
}

.lightbox__caption {
  margin: 0.85rem 0 0;
  color: rgba(255, 255, 255, 0.92);
  text-align: center;
  font-size: var(--fs-sm);
}

.lightbox__close {
  position: absolute;
  top: -0.4rem;
  right: -0.4rem;
  width: 42px;
  height: 42px;
  border: 0;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

.lightbox__close:hover {
  background: var(--color-accent-hover);
}

.lightbox__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 46px;
  height: 46px;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  color: var(--color-primary);
  font-size: 1.8rem;
  line-height: 1;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  z-index: 2;
}

.lightbox__nav:hover {
  background: #fff;
  color: var(--color-accent);
}

.lightbox__nav--prev {
  left: -0.35rem;
}

.lightbox__nav--next {
  right: -0.35rem;
}

.lightbox__nav[hidden] {
  display: none;
}

.lightbox__counter {
  margin: 0.4rem 0 0;
  color: rgba(255, 255, 255, 0.75);
  text-align: center;
  font-size: var(--fs-xs);
}

@media (max-width: 720px) {
  .lightbox__nav--prev {
    left: 0.25rem;
  }

  .lightbox__nav--next {
    right: 0.25rem;
  }
}

body.lightbox-open {
  overflow: hidden;
}

@media (max-width: 720px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .gallery-grid .gallery-item img {
    height: 280px;
  }
}

.service-block {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: var(--space-6);
  align-items: start;
  margin-bottom: var(--space-7);
  padding: var(--space-6);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.service-block:nth-child(even) {
  grid-template-columns: 1.1fr 0.9fr;
}

.service-block:nth-child(even) .service-block__copy {
  order: 2;
}

.service-block:nth-child(even) .service-block__media {
  order: 1;
}

.service-block__media {
  display: grid;
  gap: var(--space-4);
}

.service-block__media img {
  border-radius: var(--radius-md);
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.contact-layout {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: var(--space-6);
}

.contact-card,
.form-card,
.map-placeholder {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  padding: var(--space-6);
}

.contact-list {
  display: grid;
  gap: var(--space-4);
}

.contact-list li {
  display: grid;
  gap: 0.25rem;
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.contact-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.contact-list strong {
  color: var(--color-primary);
}

.qr-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-5);
}

.qr-item {
  text-align: center;
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: #fff;
}

.qr-item img {
  width: 100%;
  max-width: 120px;
  margin: 0 auto var(--space-2);
}

.qr-item span {
  display: block;
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

.form-grid {
  display: grid;
  gap: var(--space-4);
}

.form-row {
  display: grid;
  gap: 0.4rem;
}

.form-row label {
  font-weight: var(--fw-medium);
  color: var(--color-primary);
}

.form-row input,
.form-row select,
.form-row textarea {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.8rem 0.95rem;
  background: #fff;
  color: var(--color-text);
}

.form-row textarea {
  min-height: 140px;
  resize: vertical;
}

.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(232, 93, 4, 0.15);
  outline: none;
}

.form-message {
  display: none;
  margin-top: var(--space-4);
  padding: var(--space-4);
  border-radius: var(--radius-sm);
  background: #e8f7ef;
  color: #146c43;
  border: 1px solid #b7e4c7;
}

.form-message.is-visible {
  display: block;
}

.form-message.is-error {
  background: #fff1f0;
  color: #a4161a;
  border-color: #f5c2c0;
}

.map-placeholder {
  min-height: 320px;
  display: grid;
  place-items: center;
  text-align: center;
  background:
    linear-gradient(135deg, rgba(11, 61, 74, 0.08), rgba(232, 93, 4, 0.08)),
    repeating-linear-gradient(
      45deg,
      #f3f7f8,
      #f3f7f8 12px,
      #eef3f5 12px,
      #eef3f5 24px
    );
}

.map-placeholder__box {
  max-width: 420px;
}

.map-placeholder h3 {
  margin-bottom: var(--space-2);
}

.map-placeholder p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

/* Footer */
.site-footer {
  background: #061f26;
  color: rgba(255, 255, 255, 0.86);
  padding-top: var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: var(--space-6);
  padding-bottom: var(--space-7);
}

.site-footer h3 {
  color: #fff;
  font-size: var(--fs-md);
  margin-bottom: var(--space-4);
}

.site-footer p,
.site-footer li {
  color: rgba(255, 255, 255, 0.78);
}

.site-footer a {
  color: rgba(255, 255, 255, 0.86);
}

.site-footer a:hover {
  color: #ffc48a;
}

.footer-links {
  display: grid;
  gap: 0.55rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: var(--space-4) 0;
  font-size: var(--fs-xs);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: space-between;
}

/* Back to top */
.back-to-top {
  position: fixed;
  right: 1.1rem;
  bottom: 1.1rem;
  width: 46px;
  height: 46px;
  border: 0;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition), transform var(--transition),
    visibility var(--transition);
  z-index: var(--z-top);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-accent-hover);
}

/* Scroll animation */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* Utility */
.text-muted {
  color: var(--color-text-muted);
}

.mt-0 {
  margin-top: 0;
}

.mb-0 {
  margin-bottom: 0;
}

.stack-sm > * + * {
  margin-top: var(--space-3);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
  font-size: var(--fs-xs);
}

/* Responsive */
@media (max-width: 1024px) {
  .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid--3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .media-split,
  .contact-layout,
  .service-block,
  .service-block:nth-child(even) {
    grid-template-columns: 1fr;
  }

  .service-block:nth-child(even) .service-block__copy,
  .service-block:nth-child(even) .service-block__media {
    order: initial;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    width: min(84vw, 340px);
    height: 100vh;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 5.5rem 1.25rem 1.5rem;
    box-shadow: var(--shadow-lg);
    transform: translateX(105%);
    transition: transform var(--transition);
    z-index: var(--z-overlay);
  }

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

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.35rem;
  }

  .site-nav__link {
    padding: 0.9rem 1rem;
    border-radius: var(--radius-sm);
  }

  .site-nav .btn {
    width: 100%;
    margin-top: var(--space-3);
  }

  .nav-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), visibility var(--transition);
    z-index: calc(var(--z-overlay) - 1);
  }

  .nav-backdrop.is-open {
    opacity: 1;
    visibility: visible;
  }

  body.nav-open {
    overflow: hidden;
  }
}

@media (max-width: 720px) {
  .section {
    padding: var(--space-7) 0;
  }

  .grid--2,
  .grid--3,
  .grid--4,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .topbar__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero {
    min-height: 480px;
    align-items: center;
  }

  .hero__content {
    padding-block: var(--space-7);
  }

  .cta-banner {
    text-align: center;
    justify-content: center;
  }

  .qr-grid {
    grid-template-columns: 1fr;
  }

  .qr-item img {
    max-width: 160px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}