/* ===================================
   DIGImed v3 — Main Stylesheet
   Mobile-first responsive design
   =================================== */

/* --- CSS Custom Properties --- */
:root {
  /* Colors */
  --color-primary: #005c9d;
  --color-primary-hover: #004a7d;
  --color-accent: #09a5e1;
  --color-dark: #231815;
  --color-text: #231815;
  --color-text-light: #607997;
  --color-bg: #ffffff;
  --color-bg-alt: #f5f7fa;
  --color-footer: #b7d2ee;
  --color-border: #3f3a39;

  /* Fonts */
  --font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-base: 16px;
  --font-size-sm: 14px;
  --font-size-xs: 12px;
  --font-size-lg: 18px;
  --font-size-xl: 22px;
  --font-size-2xl: 30px;
  --font-size-hero: 72px;

  /* Spacing */
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 40px;
  --space-xl: 60px;
  --space-2xl: 100px;
  --space-3xl: 160px;

  /* Layout */
  --max-width: 880px;
  --header-height: 80px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  letter-spacing: -0.5px;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

ul, ol {
  list-style: none;
}

/* --- Container --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-sm);
}

.container-wide {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 var(--space-sm);
}

/* --- Header --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--color-bg);
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
  height: var(--header-height);
  display: flex;
  align-items: center;
}

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

.site-logo a {
  display: flex;
  align-items: center;
}

.site-logo img {
  height: 40px;
  width: auto;
}

/* Desktop Navigation */
.nav-desktop {
  display: none;
}

.nav-desktop ul {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-desktop > ul > li {
  position: relative;
}

.nav-desktop > ul > li > a {
  display: block;
  padding: 8px 16px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-dark);
  letter-spacing: 0;
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.nav-desktop > ul > li > a:hover,
.nav-desktop > ul > li > a.active {
  color: var(--color-primary);
}

/* Dropdown */
.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background: var(--color-bg);
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
  border-radius: 4px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--transition-normal);
  padding: 8px 0;
  z-index: 100;
}

.nav-desktop > ul > li:hover .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown a {
  display: block;
  padding: 10px 20px;
  font-size: var(--font-size-sm);
  color: var(--color-dark);
  transition: all var(--transition-fast);
}

.nav-dropdown a:hover {
  background: var(--color-bg-alt);
  color: var(--color-primary);
}

/* Hamburger Button */
.hamburger-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1100;
}

.hamburger-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-dark);
  margin: 3px 0;
  transition: all var(--transition-normal);
  border-radius: 2px;
}

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

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

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

/* Mobile Menu Overlay */
.mobile-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1050;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.mobile-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Mobile Slide-in Menu */
.mobile-menu {
  position: fixed;
  top: 0;
  right: -300px;
  width: 280px;
  height: 100vh;
  background: var(--color-bg);
  z-index: 1060;
  transition: right var(--transition-normal);
  overflow-y: auto;
  box-shadow: -4px 0 16px rgba(0,0,0,0.1);
  display: block;
}

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

.mobile-menu-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid #eee;
}

.mobile-menu-close {
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--color-dark);
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-menu nav ul {
  padding: 8px 0;
}

.mobile-menu nav > ul > li > a {
  display: block;
  padding: 14px 20px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-dark);
  border-bottom: 1px solid #f0f0f0;
}

.mobile-menu nav > ul > li > a:hover {
  color: var(--color-primary);
}

.mobile-menu .dropdown-toggle {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.mobile-menu .dropdown-toggle::after {
  content: '+';
  font-size: 18px;
  font-weight: 300;
  transition: transform var(--transition-normal);
}

.mobile-menu .dropdown-toggle.open::after {
  content: '−';
}

.mobile-menu .dropdown-sub {
  display: none;
  background: #f8f9fb;
}

.mobile-menu .dropdown-sub.open {
  display: block;
}

.mobile-menu .dropdown-sub a {
  display: block;
  padding: 12px 20px 12px 35px;
  font-size: 14px;
  color: #555;
  border-bottom: 1px solid #eee;
}

.mobile-menu .dropdown-sub a:hover {
  color: var(--color-primary);
  background: #eef3f9;
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #fff;
  overflow: hidden;
  margin-top: var(--header-height);
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero-bg::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.35);
}

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

.hero-content h1 {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-xs);
  animation: fadeInUp 0.8s ease-out;
}

.hero-content h1 span {
  display: block;
}

.hero-content p {
  font-size: var(--font-size-base);
  margin-top: var(--space-xs);
  opacity: 0.9;
}

.hero-tagline-img {
  max-width: 328px;
  margin: var(--space-sm) auto 0;
  animation: fadeInUp 0.8s ease-out 0.8s both;
}

/* --- Numbered Items (❶❷❸) --- */
.numbered-list {
  list-style: none;
  padding: 0;
  margin: var(--space-lg) 0;
}

.numbered-list li {
  margin-bottom: var(--space-md);
  padding-left: 40px;
  position: relative;
  min-height: 32px;
}

.numbered-list li::before {
  position: absolute;
  left: 0;
  top: 0;
  font-size: 24px;
  color: var(--color-primary);
}

.numbered-list .item-1::before { content: '❶'; }
.numbered-list .item-2::before { content: '❷'; }
.numbered-list .item-3::before { content: '❸'; }
.numbered-list .item-4::before { content: '❹'; }
.numbered-list .item-5::before { content: '❺'; }
.numbered-list .item-6::before { content: '❻'; }
.numbered-list .item-7::before { content: '❼'; }

.numbered-list li strong {
  display: block;
  color: var(--color-primary);
  font-size: var(--font-size-lg);
  margin-bottom: 4px;
}

/* --- Square Bullet List (■) --- */
.square-list {
  list-style: none;
  padding: 0;
  margin: var(--space-md) 0;
}

.square-list li {
  padding-left: 24px;
  position: relative;
  margin-bottom: var(--space-xs);
  line-height: 1.8;
}

.square-list li::before {
  content: '■';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-size: 12px;
  top: 4px;
}

/* --- Section Subtitle --- */
.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

/* --- Image Row (multiple images side by side) --- */
.image-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
  margin: 48px 0;
}

.image-row img {
  width: 100%;
  border-radius: 8px;
}

.image-row.two-col {
  grid-template-columns: 1fr 1fr;
}

.image-row.three-col {
  grid-template-columns: 1fr 1fr 1fr;
}

/* --- Product Type Header (베드형/체어형) --- */
.product-type-header {
  text-align: center;
  padding: var(--space-lg) 0;
  margin-bottom: var(--space-md);
}

.product-type-header img {
  max-width: 100%;
  margin: 0 auto var(--space-md);
  border-radius: 8px;
}

/* --- Contact Product Card --- */
.contact-product-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-md);
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  transition: border-color var(--transition-fast);
  cursor: pointer;
}

.contact-product-card:hover {
  border-color: var(--color-accent);
}

.contact-product-card input[type="checkbox"] {
  margin-bottom: var(--space-xs);
  accent-color: var(--color-primary);
  width: 18px;
  height: 18px;
}

.contact-product-card .card-img {
  width: 100%;
  max-width: 290px;
  height: 150px;
  object-fit: contain;
  margin-bottom: var(--space-xs);
  border-radius: 4px;
}

.contact-product-card .card-name {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-dark);
}

/* --- Section Styles --- */
.section {
  padding: 60px 0;
}

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

.section-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
  line-height: 1.3;
}

.section-title .sub {
  display: block;
  font-size: var(--font-size-2xl);
  color: var(--color-primary);
  margin-top: var(--space-xs);
}

.section-title .en {
  display: block;
  font-size: var(--font-size-2xl);
  color: var(--color-dark);
  margin-bottom: 4px;
}

.section-text {
  font-size: var(--font-size-sm);
  line-height: 1.8;
  color: var(--color-dark);
  letter-spacing: -0.5px;
}

.section-text p {
  margin-bottom: var(--space-sm);
}

.section-text ul {
  list-style: square;
  padding-left: var(--space-md);
  margin-bottom: var(--space-sm);
}

.section-text ul li {
  margin-bottom: var(--space-xs);
  line-height: 1.6;
}

.separator {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-lg) 0;
}

/* --- Content Image Styles --- */
.content-img {
  width: 100%;
  max-width: 600px;
  margin: 48px auto;
  display: block;
  border-radius: 8px;
}

.content-img.full-width {
  max-width: 100%;
  border-radius: 8px;
}

.content-img.narrow {
  max-width: 400px;
}

.side-by-side {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
  margin: 48px 0;
}

.side-by-side.reverse {
  flex-direction: row-reverse;
}

.side-by-side .text-col {
  flex: 1;
  min-width: 0;
}

.side-by-side .img-col {
  flex: 0 0 35%;
  max-width: 40%;
}

.side-by-side .img-col img {
  width: 100%;
  border-radius: 8px;
}

/* --- Product Cards (Index) --- */
.product-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.product-card {
  background: var(--color-bg);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}

.product-card-img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

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

.product-card-body h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--color-dark);
}

.product-card-body p {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
}

.btn {
  display: inline-block;
  padding: 10px 24px;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: 4px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition-fast);
  text-align: center;
}

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

.btn-outline {
  background: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}

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

/* --- Inquiry Section --- */
.inquiry-section {
  padding: var(--space-xl) 0 var(--space-2xl);
  background: var(--color-bg);
}

.inquiry-section .section-title {
  text-align: center;
}

.inquiry-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 24px;
}

.inquiry-form-grid .form-group {
  margin-bottom: 0;
}

.inquiry-form-grid .form-group-full {
  grid-column: 1 / -1;
}

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

@media (max-width: 767px) {
  .inquiry-form-grid {
    grid-template-columns: 1fr;
  }
}

/* --- Product Section --- */
.product-section {
  padding: 60px 0;
}

.product-section .product-badge {
  display: inline-block;
  padding: 8px 20px;
  background: var(--color-accent);
  color: #fff;
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: 0;
  margin-bottom: var(--space-md);
}

.product-section .product-badge.accent {
  background: var(--color-primary);
}

.product-name {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: var(--space-md);
  text-align: center;
}

.product-content-img {
  width: 100%;
  max-width: 600px;
  margin: 48px auto;
  display: block;
  border-radius: 8px;
}

.product-content-img.full-width {
  max-width: 100%;
  border-radius: 0;
}

/* --- About Section --- */
.about-block {
  margin-bottom: var(--space-lg);
}

.about-block h3 {
  color: var(--color-accent);
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.about-block p {
  line-height: 1.7;
  color: var(--color-dark);
  font-size: var(--font-size-sm);
}

.about-values-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  margin-top: var(--space-md);
}

/* --- Papers Section --- */
/* --- Papers List --- */
.papers-list {
  margin-top: 48px;
}

.paper-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 0;
}

.paper-item .paper-number {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  min-width: 28px;
}

.paper-item .paper-title-text {
  flex: 1;
  font-size: var(--font-size-base);
  color: var(--color-dark);
  line-height: 1.6;
}

.paper-item .paper-download {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  padding: 8px 20px;
  border-radius: 4px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  white-space: nowrap;
  text-decoration: none;
  transition: background var(--transition-fast);
}

.paper-item .paper-download:hover {
  background: var(--color-primary-hover);
  color: #fff;
}

.paper-divider {
  border: none;
  border-top: 1px solid #e0e0e0;
  margin: 0;
}

.paper-divider-double {
  border: none;
  border-top: 3px solid var(--color-primary);
  margin: 24px 0;
}

/* Mobile: stack vertically */
@media (max-width: 767px) {
  .paper-item {
    flex-wrap: wrap;
    gap: 8px;
  }
  .paper-item .paper-number {
    min-width: 24px;
  }
  .paper-item .paper-title-text {
    flex-basis: 100%;
    padding-left: 28px;
    margin-top: -4px;
  }
  .paper-item .paper-download {
    margin-left: 28px;
  }
}

/* --- Contact Form --- */
.contact-section {
  padding: var(--space-xl) 0 var(--space-3xl);
}

.contact-section .section-title {
  text-align: center;
}

.contact-section .section-subtitle {
  text-align: center;
  color: var(--color-accent);
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-lg);
}

.device-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}

.device-grid label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm);
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  cursor: pointer;
  transition: border-color var(--transition-fast);
  background: #fff;
  text-align: center;
}

.device-grid label:hover {
  border-color: var(--color-accent);
}

.device-grid input[type="checkbox"]:checked + span {
  color: var(--color-primary);
  font-weight: 600;
}

.device-grid label img {
  width: auto;
  max-width: 100%;
  max-height: 200px;
  height: auto;
  object-fit: contain;
  border-radius: 4px;
}

.device-grid .device-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.device-grid .device-info span {
  font-size: var(--font-size-sm);
  color: var(--color-dark);
}

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

.form-group {
  margin-bottom: var(--space-md);
}

.form-group label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--color-dark);
}

.form-group label .required {
  color: #e74c3c;
  margin-left: 2px;
}

.form-control {
  width: 100%;
  padding: 8px 0;
  border: none;
  border-bottom: 1px solid #ccc;
  border-radius: 0;
  font-size: var(--font-size-sm);
  font-family: var(--font-family);
  transition: border-color var(--transition-fast);
  background: transparent;
}

.form-control:focus {
  outline: none;
  border-bottom-color: var(--color-primary);
  box-shadow: none;
}

.phone-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.phone-group .form-control {
  width: 100%;
  max-width: 100px;
  text-align: center;
}

.phone-group .dash {
  font-size: var(--font-size-lg);
  color: #999;
}

/* --- Address Group --- */
.address-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* --- Postcode Layer (inline overlay) --- */
.form-group.full-width {
  grid-column: 1 / -1;
  position: relative;
}

.postcode-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 400px;
  border: 1px solid #ddd;
  border-radius: 4px;
  overflow: hidden;
  z-index: 100;
  background: #fff;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.postcode-layer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  background: #f5f5f5;
  border-bottom: 1px solid #ddd;
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.postcode-layer-close {
  background: none;
  border: none;
  font-size: 18px;
  cursor: pointer;
  color: #666;
  padding: 0 4px;
}

#postcode-layer-content {
  width: 100%;
  height: calc(100% - 36px);
}

/* Address inputs — readonly fields clickable hint */
.address-group input[readonly] {
  cursor: pointer;
}

.address-group input[readonly]:hover {
  border-bottom-color: var(--color-primary);
}

.form-note {
  text-align: center;
  font-size: var(--font-size-sm);
  color: #666;
  margin-top: var(--space-lg);
}

.btn-submit {
  display: inline-block;
  padding: 12px 40px;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: 4px;
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast);
}

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

/* Inquiry / Contact form note */
/* --- Footer --- */
.site-footer {
  background: var(--color-footer);
  padding: var(--space-xl) 0 var(--space-lg);
  position: relative;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.footer-logo img {
  height: 40px;
  width: auto;
}

.footer-decoration {
  text-align: center;
  margin: var(--space-sm) 0;
}

.footer-decoration img {
  max-width: 100%;
  height: auto;
  margin: 0 auto;
  display: block;
}

.footer-info p {
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 4px;
}

.footer-info strong {
  color: var(--color-text-light);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}

.footer-links a {
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
}

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

.footer-separator {
  width: 1px;
  height: 55px;
  background: #7089A7;
}

.footer-desktop-row {
  display: none;
}

/* --- Animations --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fadeInUp {
  animation: fadeInUp 0.8s ease-out;
}

.animate-delay-1 { animation-delay: 0.2s; animation-fill-mode: both; }
.animate-delay-2 { animation-delay: 0.4s; animation-fill-mode: both; }
.animate-delay-3 { animation-delay: 0.6s; animation-fill-mode: both; }

/* --- Success Page --- */
.success-container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  text-align: center;
  padding: 60px 20px;
  background: #f5f5f5;
}

.success-icon {
  font-size: 64px;
  color: var(--color-primary);
  margin-bottom: 24px;
}

.success-container h1 {
  color: #212121;
  font-size: 28px;
  margin-bottom: 16px;
  font-weight: 700;
}

.success-container p {
  color: #555;
  font-size: var(--font-size-base);
  line-height: 1.6;
  margin-bottom: 32px;
}

.success-container .btn {
  padding: 12px 32px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 6px;
  font-size: var(--font-size-base);
  font-weight: 600;
}

/* --- Utility Classes --- */
.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.text-accent { color: var(--color-accent); }
.text-dark { color: var(--color-dark); }
.text-light { color: var(--color-text-light); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.hidden { display: none !important; }

/* ===================================
   Responsive — Tablet (768px+)
   =================================== */
@media (min-width: 768px) {
  .hamburger-btn {
    display: none;
  }

  .nav-desktop {
    display: flex;
  }

  .mobile-menu {
    display: none;
  }

  .mobile-overlay {
    display: none;
  }

  .mobile-overlay.active {
    opacity: 0;
    visibility: hidden;
  }

  .hero {
    min-height: 70vh;
  }

  .hero-content h1 {
    font-size: 48px;
  }

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

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

  .device-grid label {
    flex-direction: column;
  }

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

  .form-group.full-width {
    grid-column: 1 / -1;
  }

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

  .footer-inner {
    flex-direction: row;
    align-items: flex-start;
  }

  .footer-desktop-row {
    display: flex;
  }

  .side-by-side {
    gap: var(--space-lg);
  }
}

/* ===================================
   Responsive — Desktop (1024px+)
   =================================== */
@media (min-width: 1024px) {
  .container {
    padding: 0 var(--space-lg);
  }

  .hero {
    min-height: 80vh;
  }

  .hero-content h1 {
    font-size: var(--font-size-hero);
  }

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

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

  .device-grid label {
    flex-direction: column;
    text-align: center;
  }

  .device-grid label img {
    height: 150px;
    max-width: 100%;
  }

  .section {
    padding: 100px 0;
  }

  .section-text {
    font-size: var(--font-size-lg);
  }

  .section-title {
    font-size: var(--font-size-2xl);
  }

  .content-img {
    max-width: 700px;
  }
}

/* ===================================
   Accessibility & Print
   =================================== */
@media print {
  .site-header,
  .hamburger-btn,
  .mobile-menu,
  .mobile-overlay,
  .site-footer {
    display: none;
  }

  .hero {
    min-height: auto;
    margin-top: 0;
  }
}

/* Focus styles for keyboard navigation */
*:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}