/* ============================================================
   MAIFUDE PACKAGING — Main Stylesheet
   B2B Industrial Packaging Website
   ============================================================ */

/* --- CSS Custom Properties --- */
:root {
  /* Colors */
  --color-primary: #0d2b45;
  --color-primary-light: #1a4a72;
  --color-primary-dark: #091c2e;
  --color-accent: #e67e22;
  --color-accent-hover: #d35400;
  --color-accent-light: #fdebd0;
  --color-white: #ffffff;
  --color-off-white: #f8f9fa;
  --color-light-gray: #e9ecef;
  --color-mid-gray: #adb5bd;
  --color-gray: #6c757d;
  --color-dark-gray: #495057;
  --color-text: #212529;
  --color-text-light: #495057;
  --color-success: #27ae60;
  --color-error: #e74c3c;
  --color-border: #dee2e6;

  /* Typography */
  --font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-heading: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;

  /* Layout */
  --max-width: 1200px;
  --max-width-narrow: 800px;
  --border-radius: 6px;
  --border-radius-lg: 12px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --transition: 0.2s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-primary);
  color: var(--color-text);
  line-height: 1.6;
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-primary-light);
  text-decoration: none;
  transition: color var(--transition);
}

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

ul, ol {
  list-style: none;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-light);
}

strong {
  color: var(--color-text);
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-title h2 {
  position: relative;
  display: inline-block;
  margin-bottom: var(--spacing-sm);
}

.section-title h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--color-accent);
  margin: var(--spacing-sm) auto 0;
  border-radius: 2px;
}

.section-title p {
  font-size: 1.1rem;
  color: var(--color-gray);
  max-width: 600px;
  margin: var(--spacing-sm) auto 0;
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container-narrow {
  max-width: var(--max-width-narrow);
}

section {
  padding: var(--spacing-4xl) 0;
}

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

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  border: 2px solid transparent;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  line-height: 1.4;
}

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

.btn-primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: var(--color-white);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

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

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

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

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 1.1rem;
}

.btn-sm {
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
}

/* --- Header / Navigation --- */
.site-header {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-primary);
  text-decoration: none;
}

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

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

.logo-placeholder {
  width: 40px;
  height: 40px;
  background: var(--color-primary);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--border-radius);
  font-weight: 700;
  font-size: 1.1rem;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.main-nav a {
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.95rem;
  padding: var(--spacing-xs) 0;
  border-bottom: 2px solid transparent;
  transition: all var(--transition);
}

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

.nav-cta {
  margin-left: var(--spacing-md);
}

/* Language Toggle */
.lang-toggle {
  background: var(--color-off-white);
  color: var(--color-primary);
  border: 1px solid var(--color-border);
  padding: 0.35rem 0.75rem;
  border-radius: var(--border-radius);
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 700;
  margin-left: var(--spacing-sm);
  transition: all var(--transition);
  white-space: nowrap;
}

.lang-toggle:hover {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  margin: 5px 0;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

/* Hamburger → X animation */
.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Dropdown */
.has-dropdown {
  position: relative;
}

.has-dropdown > a::after {
  content: ' ▾';
  font-size: 0.7rem;
}

.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: -1rem;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  min-width: 220px;
  padding: var(--spacing-sm) 0;
  z-index: 1001;
}

.has-dropdown:hover .dropdown-menu {
  display: block;
}

.dropdown-menu a {
  display: block;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-bottom: none !important;
  font-size: 0.9rem;
}

.dropdown-menu a:hover {
  background: var(--color-off-white);
  color: var(--color-accent);
}

/* --- Hero Section --- */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-white);
  padding: var(--spacing-4xl) 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="rgba(255,255,255,0.03)" d="M0,160L48,176C96,192,192,224,288,213.3C384,203,480,149,576,138.7C672,128,768,160,864,181.3C960,203,1056,213,1152,197.3C1248,181,1344,139,1392,117.3L1440,96L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"/></svg>') no-repeat bottom;
  background-size: cover;
  pointer-events: none;
}

.hero .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.hero-content {
  max-width: 800px;
}

.hero-content h1 {
  font-size: 2.8rem;
  color: var(--color-white);
  margin-bottom: var(--spacing-lg);
  line-height: 1.2;
}

.hero-content p {
  font-size: 1.2rem;
  color: rgba(255,255,255,0.85);
  margin-bottom: var(--spacing-xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

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

.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-placeholder {
  width: 100%;
  max-width: 500px;
  aspect-ratio: 4/3;
  background: rgba(255,255,255,0.08);
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.5);
  font-size: 0.9rem;
  border: 2px dashed rgba(255,255,255,0.15);
}

/* --- Trust Bar --- */
.trust-bar {
  background: var(--color-off-white);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-lg) 0;
}

.trust-bar .container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-3xl);
  flex-wrap: wrap;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-dark-gray);
}

.trust-icon {
  width: 22px;
  height: 22px;
  background: var(--color-accent);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  flex-shrink: 0;
}

/* --- Cards Grid --- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-xl);
}

.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  box-shadow: var(--shadow-sm);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.card-img {
  width: 100%;
  aspect-ratio: 4/3;
  background: var(--color-off-white);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  top: 0;
  left: 0;
}

.card-img .placeholder {
  color: var(--color-mid-gray);
  font-size: 0.85rem;
  text-align: center;
  padding: var(--spacing-md);
}

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

.card-body h3 {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-sm);
}

.card-body p {
  font-size: 0.9rem;
  color: var(--color-gray);
  margin-bottom: var(--spacing-md);
}

.card-body .btn {
  margin-top: var(--spacing-sm);
}

/* --- Feature / Benefit List --- */
.feature-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--spacing-xl);
}

.feature-item {
  text-align: center;
  padding: var(--spacing-xl);
}

.feature-icon {
  width: 64px;
  height: 64px;
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-md);
  font-size: 1.5rem;
}

.feature-item h3 {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-sm);
}

.feature-item p {
  font-size: 0.9rem;
}

/* --- CTA Section --- */
.cta-section {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
  color: var(--color-white);
  text-align: center;
  padding: var(--spacing-4xl) 0;
}

.cta-section h2 {
  color: var(--color-white);
  margin-bottom: var(--spacing-sm);
}

.cta-section p {
  color: rgba(255,255,255,0.9);
  font-size: 1.1rem;
  margin-bottom: var(--spacing-xl);
}

/* --- Page Header (inner pages) --- */
.page-header {
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-3xl) 0;
  text-align: center;
}

.page-header h1 {
  color: var(--color-white);
  margin-bottom: var(--spacing-sm);
}

.page-header p {
  color: rgba(255,255,255,0.8);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  font-size: 0.9rem;
  color: rgba(255,255,255,0.7);
}

.breadcrumb a {
  color: rgba(255,255,255,0.8);
}

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

.breadcrumb span {
  color: rgba(255,255,255,0.5);
}

/* --- Product Detail Layout --- */
.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: start;
}

/* When there is no product-gallery, let product-info take full width */
.product-detail:has(.product-info:only-child) {
  grid-template-columns: 1fr;
  max-width: 900px;
  margin: 0 auto;
}

.product-gallery {
  position: sticky;
  top: 100px;
}

.product-gallery-main {
  width: 100%;
  aspect-ratio: 4/3;
  background: var(--color-off-white);
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.product-gallery-main img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.product-info h1 {
  font-size: 2rem;
}

.product-info .tagline {
  font-size: 1.1rem;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
}

/* --- Specs Table --- */
.specs-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--spacing-xl);
}

.specs-table th,
.specs-table td {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9rem;
}

.specs-table th {
  background: var(--color-off-white);
  font-weight: 600;
  color: var(--color-primary);
  width: 40%;
  white-space: nowrap;
}

.specs-table td {
  color: var(--color-text-light);
}

/* --- FAQ Accordion --- */
.faq-list {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-sm);
  overflow: hidden;
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--spacing-lg);
  background: var(--color-white);
  border: none;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  transition: background var(--transition);
}

.faq-question:hover {
  background: var(--color-off-white);
}

.faq-question::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--color-accent);
  flex-shrink: 0;
  margin-left: var(--spacing-md);
  transition: transform var(--transition);
}

.faq-item.open .faq-question::after {
  content: '−';
  transform: rotate(180deg);
}

.faq-answer {
  display: none;
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  color: var(--color-text-light);
  line-height: 1.7;
}

.faq-item.open .faq-answer {
  display: block;
}

/* --- Contact Form --- */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text);
  font-size: 0.9rem;
}

.form-group label .required {
  color: var(--color-error);
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-family: inherit;
  color: var(--color-text);
  transition: border-color var(--transition);
  background: var(--color-white);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(230,126,34,0.15);
}

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

select.form-control {
  cursor: pointer;
}

.form-check {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.form-check input[type="checkbox"] {
  margin-top: 3px;
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.form-check label {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

/* Contact Info Sidebar */
.contact-info {
  background: var(--color-off-white);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  height: fit-content;
}

.contact-info h3 {
  margin-bottom: var(--spacing-lg);
}

.contact-info-item {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.contact-info-icon {
  width: 40px;
  height: 40px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1rem;
}

.contact-info-text h4 {
  font-size: 0.95rem;
  margin-bottom: 2px;
}

.contact-info-text p {
  font-size: 0.9rem;
  margin-bottom: 0;
}

/* --- Stats Bar --- */
.stats-bar {
  background: var(--color-primary);
  padding: var(--spacing-2xl) 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-xl);
  text-align: center;
}

.stat-item .stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--spacing-xs);
}

.stat-item .stat-label {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.8);
}

/* --- Process / Steps --- */
.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
}

.process-step {
  text-align: center;
  padding: var(--spacing-xl);
  position: relative;
}

.process-step-number {
  width: 48px;
  height: 48px;
  background: var(--color-accent);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.2rem;
  margin: 0 auto var(--spacing-md);
}

.process-step h4 {
  margin-bottom: var(--spacing-sm);
}

.process-step p {
  font-size: 0.9rem;
}

/* --- Case Study Card --- */
.case-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr 2fr;
  margin-bottom: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
}

.case-card-img {
  background: var(--color-off-white);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
}

.case-card-body {
  padding: var(--spacing-xl);
}

.case-card-body .case-meta {
  display: flex;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  font-size: 0.85rem;
  color: var(--color-accent);
  font-weight: 600;
}

/* --- Blog Cards --- */
.blog-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: var(--transition);
}

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

.blog-card-img {
  width: 100%;
  aspect-ratio: 16/9;
  background: var(--color-off-white);
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.blog-card-body .blog-date {
  font-size: 0.85rem;
  color: var(--color-gray);
  margin-bottom: var(--spacing-sm);
}

.blog-card-body h3 {
  font-size: 1.15rem;
}

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

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

.footer-col h4 {
  color: var(--color-white);
  font-size: 1rem;
  margin-bottom: var(--spacing-lg);
}

.footer-col p {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
}

.footer-col a {
  display: block;
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
  padding: 3px 0;
  transition: color var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--spacing-xl);
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.4);
}

/* --- Tags / Pills --- */
.tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--color-accent-light);
  color: var(--color-accent-hover);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
}

/* --- Alert / Notice --- */
.alert {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-lg);
  font-size: 0.95rem;
}

.alert-info {
  background: #e8f4fd;
  color: #0c5460;
  border: 1px solid #bee5eb;
}

.alert-success {
  background: #e8f5e9;
  color: #1b5e20;
  border: 1px solid #c8e6c9;
}

/* --- Form Feedback Messages --- */
.form-feedback {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-lg);
  font-size: 0.95rem;
  line-height: 1.5;
}

.form-feedback-error {
  background: #fdecea;
  color: #b71c1c;
  border: 1px solid #f5c6cb;
}

.form-feedback-success {
  background: #e8f5e9;
  color: #1b5e20;
  border: 1px solid #c8e6c9;
}

.form-error {
  color: #e74c3c;
  font-size: 0.8rem;
  margin-top: 2px;
  display: block;
}

.is-invalid {
  border-color: #e74c3c !important;
  box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.12) !important;
}

/* Submit button spinner */
.btn-spinner {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.btn-spinner::before {
  content: '';
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

/* --- Tabs --- */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--color-border);
  margin-bottom: var(--spacing-xl);
  overflow-x: auto;
}

.tab-btn {
  padding: var(--spacing-md) var(--spacing-lg);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  font-weight: 600;
  color: var(--color-gray);
  font-size: 0.95rem;
  white-space: nowrap;
  transition: all var(--transition);
}

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

.tab-btn.active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* --- Download Card --- */
.download-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg);
  background: var(--color-off-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-sm);
}

.download-card .file-info h4 {
  margin-bottom: 2px;
  font-size: 1rem;
}

.download-card .file-info p {
  margin-bottom: 0;
  font-size: 0.85rem;
  color: var(--color-gray);
}

/* --- Back to Top --- */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  background: var(--color-accent);
  color: var(--color-white);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.2rem;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
}

/* --- Utility --- */
.text-center { text-align: center; }
.text-accent { color: var(--color-accent); }
.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }
.mt-0 { margin-top: 0; }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

/* --- Placeholder --- */
.img-placeholder {
  background: var(--color-light-gray);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-mid-gray);
  font-size: 0.85rem;
  text-align: center;
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
}

/* ============================================================
   RESPONSIVE DESIGN
   Mobile-first refinements over desktop base.
   Breakpoints: 1200px / 1024px / 768px / 600px / 480px
   ============================================================ */

/* --- ≥1200px Wide Desktop --- */
@media (min-width: 1200px) {
  .container { padding: 0; }
}

/* --- ≤1024px Tablet Landscape --- */
@media (max-width: 1024px) {
  html { font-size: 15px; }

  h1 { font-size: 2.2rem; }
  h2 { font-size: 1.8rem; }
  h3 { font-size: 1.35rem; }

  section { padding: var(--spacing-3xl) 0; }
  .section-title { margin-bottom: var(--spacing-2xl); }

  .hero-content { max-width: 100%; }
  .hero-visual { display: none; }
  .hero-content h1 { font-size: 2.2rem; }
  .hero-content p { font-size: 1.05rem; }

  .product-detail { grid-template-columns: 1fr; gap: var(--spacing-xl); }
  .product-detail:has(.product-info:only-child) { max-width: 100%; }
  .product-gallery { position: static; }
  .product-gallery-main { aspect-ratio: 16/10; }
  .product-info h1 { font-size: 1.6rem; }

  .contact-layout { grid-template-columns: 1fr; }

  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--spacing-xl); }

  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: var(--spacing-lg); }

  .case-card { grid-template-columns: 1fr; }

  .cards-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: var(--spacing-lg); }
  .feature-list { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }

  .trust-bar .container { gap: var(--spacing-xl); }

  .process-steps { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
}

/* --- ≤768px Tablet Portrait --- */
@media (max-width: 768px) {
  html { font-size: 15px; }

  h1 { font-size: 1.9rem; }
  h2 { font-size: 1.55rem; }
  h3 { font-size: 1.25rem; }
  h4 { font-size: 1.1rem; }

  .container { padding: 0 var(--spacing-md); }

  section { padding: var(--spacing-2xl) 0; }

  .section-title { margin-bottom: var(--spacing-xl); }
  .section-title h2::after { width: 40px; height: 2px; }
  .section-title p { font-size: 0.95rem; }

  /* ── Global mobile safety ── */
  body { overflow-x: hidden; width: 100%; max-width: 100vw; }
  img, table, iframe, video, pre, code { max-width: 100%; word-break: break-word; }

  /* ── Header / Mobile Nav ── */
  .header-inner { padding: var(--spacing-sm) var(--spacing-md); flex-wrap: wrap; }
  .logo { font-size: 1.15rem; }
  .logo-img { height: 32px; }

  .nav-toggle {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 8px;
    order: 10;
  }
  .nav-toggle span { width: 22px; height: 2px; background: var(--color-primary); margin: 3px 0; transition: transform 0.25s ease, opacity 0.25s ease; }

  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 2px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    gap: 0;
    max-height: 80vh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    z-index: 1000;
  }

  .main-nav.open { display: flex; }

  .main-nav > a,
  .main-nav .has-dropdown > a {
    padding: 14px 0;
    border-bottom: 1px solid var(--color-border);
    width: 100%;
    font-size: 1rem;
    display: block;
  }

  .main-nav .nav-cta {
    margin-left: 0;
    margin-top: var(--spacing-sm);
    text-align: center;
    width: 100%;
  }

  .has-dropdown > a::after { float: right; margin-right: 4px; }

  .dropdown-menu { position: static; box-shadow: none; border: none; padding: 0 0 0 var(--spacing-md); display: none; min-width: auto; }
  .has-dropdown:hover .dropdown-menu { display: none; }
  .has-dropdown.open .dropdown-menu { display: block; }
  .dropdown-menu a { padding: 10px 0; font-size: 0.95rem; border-bottom: 1px solid var(--color-light-gray); }

  .lang-toggle { order: 9; margin-left: auto; margin-right: var(--spacing-sm); }

  /* ── Hero ── */
  .hero { padding: var(--spacing-3xl) 0 var(--spacing-2xl); }
  .hero-content h1 { font-size: 1.75rem; line-height: 1.25; }
  .hero-content p { font-size: 0.95rem; max-width: 100%; }
  .hero-buttons { flex-direction: column; width: 100%; }
  .hero-buttons .btn { width: 100%; padding: 0.85rem 1.5rem; }

  /* ── Cards ── */
  .cards-grid { grid-template-columns: 1fr; gap: var(--spacing-md); }
  .card-body { padding: var(--spacing-md); }
  .card-body h3 { font-size: 1.1rem; }
  .card-body p { font-size: 0.85rem; }

  /* ── Product Detail ── */
  .product-detail { gap: var(--spacing-lg); }
  .product-gallery-main { aspect-ratio: 4/3; border-radius: var(--border-radius); }
  .product-info h1 { font-size: 1.5rem; }
  .product-info .tagline { font-size: 0.95rem; }

  /* ── Specs Table ── */
  .specs-table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; white-space: nowrap; }
  .specs-table th, .specs-table td { padding: var(--spacing-sm) var(--spacing-sm); font-size: 0.82rem; }
  .specs-table th { width: auto; min-width: 130px; }

  /* ── Tabs ── */
  .tabs { overflow-x: auto; -webkit-overflow-scrolling: touch; padding-bottom: 2px; }
  .tab-btn { padding: var(--spacing-sm) var(--spacing-md); font-size: 0.85rem; flex-shrink: 0; }

  /* ── Stats ── */
  .stats-bar { padding: var(--spacing-xl) 0; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: var(--spacing-lg); }
  .stat-item .stat-number { font-size: 2rem; }
  .stat-item .stat-label { font-size: 0.8rem; }

  /* ── Process ── */
  .process-steps { grid-template-columns: 1fr 1fr; gap: var(--spacing-sm); }
  .process-step { padding: var(--spacing-md); }
  .process-step-number { width: 40px; height: 40px; font-size: 1rem; }

  /* ── Feature List ── */
  .feature-list { grid-template-columns: 1fr; gap: var(--spacing-sm); }
  .feature-item { padding: var(--spacing-md); }
  .feature-icon { width: 52px; height: 52px; font-size: 1.3rem; }

  /* ── Contact ── */
  .contact-layout { gap: var(--spacing-xl); }
  .form-control { padding: 0.7rem 0.85rem; font-size: 16px; } /* 16px prevents iOS zoom */
  .contact-info { padding: var(--spacing-md); }

  /* ── Case Cards ── */
  .case-card { border-radius: var(--border-radius); }
  .case-card-body { padding: var(--spacing-md); }
  .case-card-body .case-meta { flex-wrap: wrap; gap: var(--spacing-sm); font-size: 0.8rem; }
  .case-card-body h3 { font-size: 1.05rem; }

  /* ── Blog ── */
  .blog-card-body { padding: var(--spacing-md); }
  .blog-card-body h3 { font-size: 1rem; }

  /* ── FAQ ── */
  .faq-question { padding: var(--spacing-md); font-size: 0.95rem; }
  .faq-answer { padding: 0 var(--spacing-md) var(--spacing-md); font-size: 0.9rem; }

  /* ── Footer ── */
  .site-footer { padding: var(--spacing-2xl) 0 var(--spacing-lg); }
  .footer-grid { grid-template-columns: 1fr; gap: var(--spacing-lg); margin-bottom: var(--spacing-xl); }
  .footer-col h4 { margin-bottom: var(--spacing-sm); font-size: 0.95rem; }
  .footer-col a { font-size: 0.85rem; padding: 5px 0; }
  .footer-bottom { padding-top: var(--spacing-md); font-size: 0.78rem; }

  /* ── Trust Bar ── */
  .trust-bar .container { gap: var(--spacing-md); }
  .trust-item { font-size: 0.8rem; }
  .trust-icon { width: 18px; height: 18px; font-size: 0.65rem; }

  /* ── CTA Section ── */
  .cta-section { padding: var(--spacing-2xl) 0; }
  .cta-section h2 { font-size: 1.5rem; }
  .cta-section p { font-size: 0.95rem; }

  /* ── Page Header ── */
  .page-header { padding: var(--spacing-2xl) 0; }
  .page-header h1 { font-size: 1.7rem; }
  .page-header p { font-size: 0.9rem; max-width: 100%; }
  .breadcrumb { font-size: 0.8rem; flex-wrap: wrap; }

  /* ── Download Card ── */
  .download-card { flex-direction: column; align-items: flex-start; gap: var(--spacing-sm); }

  /* ── Back to top ── */
  .back-to-top { bottom: 1rem; right: 1rem; width: 40px; height: 40px; font-size: 1rem; }
}

/* --- ≤600px Large Phone --- */
@media (max-width: 600px) {
  .hero { padding: var(--spacing-2xl) 0 var(--spacing-xl); }
  .hero-content h1 { font-size: 1.55rem; }
  .hero-content p { font-size: 0.9rem; }

  .stats-grid { gap: var(--spacing-md); }
  .stat-item .stat-number { font-size: 1.7rem; }
}

/* --- ≤480px Small Phone (375 / 390 / 414) --- */
@media (max-width: 480px) {
  html { font-size: 14px; }

  h1 { font-size: 1.7rem; }
  h2 { font-size: 1.4rem; }
  h3 { font-size: 1.15rem; }
  h4 { font-size: 1.05rem; }

  .container { padding: 0 0.9rem; }

  section { padding: var(--spacing-xl) 0; }
  .section-title { margin-bottom: var(--spacing-lg); }

  /* ── Header ── */
  .header-inner { padding: 0.5rem 0.9rem; }
  .logo { font-size: 1.05rem; }
  .logo-img { height: 28px; }

  .lang-toggle { font-size: 0.75rem; padding: 0.3rem 0.6rem; }

  /* ── Hero ── */
  .hero { padding: var(--spacing-2xl) 0 var(--spacing-xl); }
  .hero-content h1 { font-size: 1.4rem; }
  .hero-content p { font-size: 0.88rem; }
  .hero-buttons .btn { padding: 0.8rem 1rem; font-size: 0.95rem; }

  /* ── Trust Bar ── */
  .trust-bar { padding: var(--spacing-sm) 0; }
  .trust-bar .container { gap: var(--spacing-sm); justify-content: flex-start; }
  .trust-item { font-size: 0.73rem; gap: 4px; }

  /* ── Cards ── */
  .cards-grid { gap: var(--spacing-sm); }
  .card-body { padding: var(--spacing-sm); }
  .card-body h3 { font-size: 1rem; }

  /* ── Stats ── */
  .stats-grid { grid-template-columns: 1fr 1fr; gap: var(--spacing-md); }
  .stat-item .stat-number { font-size: 1.55rem; }
  .stat-item .stat-label { font-size: 0.75rem; }

  /* ── Process Steps ── */
  .process-steps { grid-template-columns: 1fr; gap: var(--spacing-xs); }
  .process-step { padding: var(--spacing-sm); }

  /* ── Product Detail ── */
  .product-gallery-main { aspect-ratio: 1/1; }
  .product-info h1 { font-size: 1.35rem; }

  /* ── Tabs ── */
  .tab-btn { padding: 0.5rem 0.75rem; font-size: 0.8rem; }

  /* ── Contact Form ── */
  .form-group label { font-size: 0.85rem; }
  .form-control { padding: 0.65rem 0.8rem; font-size: 16px; } /* 16px = no iOS zoom */
  .form-check label { font-size: 0.8rem; }
  .contact-info { padding: var(--spacing-md); }
  .contact-info h3 { font-size: 1.1rem; }
  .contact-info-item { gap: var(--spacing-sm); }
  .contact-info-icon { width: 36px; height: 36px; font-size: 0.9rem; }
  .contact-info-text h4 { font-size: 0.9rem; }
  .contact-info-text p { font-size: 0.82rem; }

  /* ── CTA ── */
  .cta-section { padding: var(--spacing-xl) 0; }
  .cta-section h2 { font-size: 1.3rem; }
  .cta-section p { font-size: 0.88rem; }
  .cta-section .btn-lg { padding: 0.75rem 1.5rem; font-size: 0.95rem; }

  /* ── Page Header ── */
  .page-header { padding: var(--spacing-xl) 0; }
  .page-header h1 { font-size: 1.5rem; }

  /* ── Footer ── */
  .footer-grid { gap: var(--spacing-md); }
  .footer-bottom { font-size: 0.73rem; }

  /* ── FAQ ── */
  .faq-question { font-size: 0.9rem; padding: var(--spacing-sm); }

  /* ── Alert ── */
  .alert { padding: var(--spacing-sm) var(--spacing-md); font-size: 0.85rem; }

  /* ── Download Card ── */
  .download-card { padding: var(--spacing-md); }
  .download-card .file-info h4 { font-size: 0.9rem; }

  /* ── Buttons ── */
  .btn { padding: 0.65rem 1.25rem; font-size: 0.9rem; min-height: 44px; display: inline-flex; align-items: center; justify-content: center; }
  .btn-lg { padding: 0.8rem 1.5rem; font-size: 0.95rem; }
  .btn-sm { padding: 0.45rem 1rem; font-size: 0.82rem; min-height: 40px; }

  /* ── No horizontal scroll ── */
  body { overflow-x: hidden; width: 100%; max-width: 100vw; }
  img, table, iframe, video { max-width: 100%; }
}

/* --- ≤375px Smallest Phones --- */
@media (max-width: 375px) {
  html { font-size: 13.5px; }
  .hero-content h1 { font-size: 1.3rem; }
  .hero-content p { font-size: 0.82rem; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat-item .stat-number { font-size: 1.35rem; }
}

/* --- Print Styles --- */
@media print {
  .site-header,
  .site-footer,
  .back-to-top,
  .btn,
  .cta-section,
  .nav-toggle {
    display: none !important;
  }

  body {
    font-size: 12pt;
    color: #000;
  }

  a {
    color: #000;
    text-decoration: underline;
  }
}