@charset "UTF-8";
/* ==========================================================================
   KÜGEER VIỆT NAM — Warranty Portal (baohanh.kugeer.vn)
   Brand Identity: Crimson Red (#e53935), Luxury Dark (#1a1a1a), Crisp White
   Fonts: DM Sans (body) & Montserrat / Jost (headings)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=Montserrat:wght@500;600;700;800&display=swap');

/* ---------- Design Tokens ---------- */
:root {
  /* Brand Accent Colors */
  --c-primary: #e53935;
  --c-primary-dark: #c62828;
  --c-primary-light: #ef5350;
  --c-primary-glow: rgba(229, 57, 53, 0.25);

  /* Dark & Neutral Palette */
  --c-black: #1a1a1a;
  --c-black-surface: #121212;
  --c-black-light: #2d2d2d;
  --c-gray-900: #111827;
  --c-gray-800: #1f2937;
  --c-gray-700: #374151;
  --c-gray-600: #4b5563;
  --c-gray-500: #6b7280;
  --c-gray-400: #9ca3af;
  --c-gray-300: #d1d5db;
  --c-gray-200: #e5e7eb;
  --c-gray-100: #f3f4f6;
  --c-gray-50: #f9fafb;
  
  --c-text-dark: #111827;
  --c-text-body: #4b5563;
  --c-text-muted: #6b7280;
  --c-bg: #f8fafc;
  --c-bg-card: #ffffff;
  --c-border: #e5e7eb;
  --c-white: #ffffff;

  /* Accent Gold */
  --c-amber: #f59e0b;
  --c-amber-hover: #d97706;

  /* Validation */
  --c-error: #dc2626;
  --c-error-bg: #fef2f2;
  --c-success: #16a34a;
  --c-success-bg: #f0fdf4;

  /* Typography */
  --font-body: 'DM Sans', system-ui, -apple-system, sans-serif;
  --font-heading: 'Montserrat', 'DM Sans', system-ui, -apple-system, sans-serif;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.08), 0 2px 4px -2px rgb(0 0 0 / 0.05);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.04);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.05);
  --shadow-glass: 0 8px 32px 0 rgba(0, 0, 0, 0.08);
  --shadow-focus: 0 0 0 3px var(--c-primary-glow);
  --shadow-red-glow: 0 10px 25px -5px rgba(229, 57, 53, 0.4);

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --ease-out: cubic-bezier(0.33, 1, 0.68, 1);
  --transition-fast: 150ms var(--ease-out);
  --transition: 300ms var(--ease-out);
  --transition-slow: 500ms var(--ease-out);

  /* Layout */
  --container-max: 1200px;
}

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

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

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--c-text-body);
  background-color: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

@media (min-width: 768px) {
  .container {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}

/* ---------- Icons ---------- */
.icon-sm {
  width: 1.125rem;
  height: 1.125rem;
  flex-shrink: 0;
}

.icon-md {
  width: 1.375rem;
  height: 1.375rem;
  flex-shrink: 0;
}

.icon-lg {
  width: 1.75rem;
  height: 1.75rem;
  flex-shrink: 0;
}

.icon-xl {
  width: 2.5rem;
  height: 2.5rem;
  flex-shrink: 0;
}

/* ==========================================================================
   HEADER
   ========================================================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(26, 26, 26, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: background-color var(--transition), box-shadow var(--transition);
}

.header.scrolled {
  background-color: rgba(26, 26, 26, 0.98);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.25rem;
}

.header-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.header-logo .logo-img {
  height: 2.25rem;
  width: auto;
  object-fit: contain;
  filter: brightness(0) invert(1);
}

.header-nav {
  display: none;
  align-items: center;
  gap: 2rem;
}

@media (min-width: 860px) {
  .header-nav {
    display: flex;
  }
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--c-gray-300);
  padding: 0.5rem 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--c-white);
}

.nav-link.active {
  color: var(--c-primary-light);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-primary-light));
  border-radius: var(--radius-full);
}

.header-contact {
  display: none;
  align-items: center;
}

@media (min-width: 860px) {
  .header-contact {
    display: flex;
  }
}

.header-phone {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--c-white);
  background-color: var(--c-primary);
  padding: 0.5rem 1.125rem;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 12px rgba(229, 57, 53, 0.35);
  transition: all var(--transition-fast);
}

.header-phone:hover {
  background-color: var(--c-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(229, 57, 53, 0.45);
}

.mobile-menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  color: var(--c-white);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.mobile-menu-btn:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

@media (min-width: 860px) {
  .mobile-menu-btn {
    display: none;
  }
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.mobile-menu-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 80%;
  max-width: 320px;
  background-color: var(--c-black);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--transition);
  box-shadow: -8px 0 30px rgba(0, 0, 0, 0.5);
}

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

.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.mobile-logo {
  height: 2rem;
  width: auto;
  filter: brightness(0) invert(1);
}

.mobile-close-btn {
  color: var(--c-gray-400);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-md);
}

.mobile-close-btn:hover {
  color: var(--c-white);
  background-color: rgba(255, 255, 255, 0.1);
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding-top: 1.5rem;
}

.mobile-nav-link {
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-gray-300);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.mobile-nav-link:hover {
  color: var(--c-white);
  background-color: rgba(255, 255, 255, 0.05);
}

.mobile-nav-phone {
  margin-top: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--c-white);
  background-color: var(--c-primary);
}

.mobile-nav-phone:hover {
  background-color: var(--c-primary-dark);
}

/* ==========================================================================
   HERO BANNER
   ========================================================================== */
.hero {
  position: relative;
  min-height: 480px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--c-white);
  padding: 4rem 1.25rem;
  overflow: hidden;
}

@media (min-width: 768px) {
  .hero {
    min-height: 520px;
    padding: 5rem 2rem;
  }
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transform: scale(1.03);
  transition: transform 8s ease-out;
}

.hero:hover .hero-bg-img {
  transform: scale(1.07);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(26, 26, 26, 0.80) 0%,
    rgba(26, 26, 26, 0.55) 40%,
    rgba(198, 40, 40, 0.68) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 1rem;
  background: rgba(229, 57, 53, 0.15);
  border: 1px solid rgba(229, 57, 53, 0.35);
  border-radius: var(--radius-full);
  color: #ff8a80;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
  animation: fadeInDown 0.6s var(--ease-out);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--c-white);
  margin-bottom: 1rem;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
  animation: fadeInUp 0.7s var(--ease-out);
}

@media (min-width: 640px) {
  .hero-title {
    font-size: 2.75rem;
  }
}

@media (min-width: 1024px) {
  .hero-title {
    font-size: 3.25rem;
  }
}

.hero-subtitle {
  font-size: 1rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.85);
  max-width: 600px;
  margin-bottom: 2rem;
  animation: fadeInUp 0.8s var(--ease-out);
}

@media (min-width: 768px) {
  .hero-subtitle {
    font-size: 1.125rem;
  }
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  padding: 1rem 1.75rem;
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-2xl);
  margin-bottom: 2rem;
  animation: fadeInUp 0.9s var(--ease-out);
}

@media (min-width: 640px) {
  .hero-stats {
    gap: 2.5rem;
    padding: 1.25rem 2.25rem;
  }
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 1.625rem;
  font-weight: 800;
  color: var(--c-white);
  line-height: 1.2;
}

@media (min-width: 640px) {
  .stat-number {
    font-size: 2rem;
  }
}

.stat-label {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.75);
  font-weight: 500;
}

@media (min-width: 640px) {
  .stat-label {
    font-size: 0.8125rem;
  }
}

.stat-divider {
  width: 1px;
  height: 2rem;
  background-color: rgba(255, 255, 255, 0.15);
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--c-white);
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-dark));
  padding: 0.875rem 2rem;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-red-glow);
  transition: all var(--transition);
  animation: fadeInUp 1s var(--ease-out);
}

.hero-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 28px -4px rgba(229, 57, 53, 0.55);
}

/* ==========================================================================
   WARRANTY FORM & LOOKUP SECTION
   ========================================================================== */
.warranty-section {
  padding: 3.5rem 0;
  margin-top: -2rem;
  position: relative;
  z-index: 10;
}

@media (min-width: 768px) {
  .warranty-section {
    padding: 4.5rem 0;
  }
}

/* Tabs Navigation */
.tabs {
  display: flex;
  background-color: var(--c-white);
  padding: 0.375rem;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-lg);
  max-width: 480px;
  margin: 0 auto 2.5rem;
  position: relative;
  border: 1px solid var(--c-gray-200);
}

.tab {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.25rem;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--c-gray-600);
  border-radius: var(--radius-xl);
  transition: all var(--transition-fast);
  position: relative;
  z-index: 2;
}

.tab:hover {
  color: var(--c-text-dark);
}

.tab.active {
  color: var(--c-white);
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-dark));
  box-shadow: 0 4px 14px rgba(229, 57, 53, 0.35);
}

/* Tab Content */
.tab-content {
  display: none;
  background-color: var(--c-white);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  padding: 2rem 1.25rem;
  border: 1px solid var(--c-gray-200);
  animation: fadeIn 0.35s var(--ease-out);
}

@media (min-width: 640px) {
  .tab-content {
    padding: 2.5rem 2rem;
  }
}

@media (min-width: 1024px) {
  .tab-content {
    padding: 3rem;
  }
}

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

.form-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 2.5rem;
}

.form-header h2 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--c-text-dark);
  margin-bottom: 0.5rem;
}

@media (min-width: 640px) {
  .form-header h2 {
    font-size: 1.875rem;
  }
}

.form-header p {
  font-size: 0.9375rem;
  color: var(--c-text-muted);
}

.required-mark {
  color: var(--c-primary);
  font-weight: 700;
}

/* Fieldsets & Groups */
.form-group {
  border: 1px solid var(--c-gray-200);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  margin-bottom: 1.75rem;
  background-color: #fafbfc;
  transition: border-color var(--transition-fast);
}

@media (min-width: 768px) {
  .form-group {
    padding: 2rem;
  }
}

.form-group:focus-within {
  border-color: rgba(229, 57, 53, 0.4);
}

.form-group-title {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--c-text-dark);
  padding: 0 0.625rem;
}

.form-group-title svg,
.form-group-title i {
  color: var(--c-primary);
}

.form-group-optional {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 400;
  color: var(--c-gray-400);
  margin-left: 0.25rem;
}

/* Form Layout */
.form-row {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: 1.25rem;
}

.form-row:first-of-type {
  margin-top: 0.75rem;
}

@media (min-width: 640px) {
  .form-row.two-cols {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
}

.form-field {
  display: flex;
  flex-direction: column;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--c-text-dark);
  margin-bottom: 0.375rem;
}

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.9375rem;
  color: var(--c-text-dark);
  background-color: var(--c-white);
  border: 1.5px solid var(--c-gray-300);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  outline: none;
}

.form-input:hover {
  border-color: var(--c-gray-400);
}

.form-input:focus {
  border-color: var(--c-primary);
  box-shadow: var(--shadow-focus);
}

.form-input::placeholder {
  color: var(--c-gray-400);
}

.form-input.is-invalid {
  border-color: var(--c-error);
  background-color: var(--c-error-bg);
}

.form-input.is-invalid:focus {
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.2);
}

.form-input:disabled {
  background-color: var(--c-gray-100);
  color: var(--c-gray-400);
  cursor: not-allowed;
  border-color: var(--c-gray-200);
}

select.form-input {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%236B7280'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 1.25rem;
  padding-right: 2.5rem;
}

.form-textarea {
  resize: vertical;
  min-height: 80px;
}

.form-error {
  font-size: 0.8125rem;
  color: var(--c-error);
  margin-top: 0.25rem;
  min-height: 1.125rem;
}

/* File Upload Area */
.file-upload-area {
  position: relative;
  border: 2px dashed var(--c-gray-300);
  border-radius: var(--radius-xl);
  padding: 2rem 1.5rem;
  text-align: center;
  background-color: var(--c-white);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.file-upload-area:hover,
.file-upload-area.drag-over {
  border-color: var(--c-primary);
  background-color: rgba(229, 57, 53, 0.02);
}

.file-input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
  z-index: 2;
}

.file-upload-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.375rem;
}

.upload-icon {
  color: var(--c-primary);
  margin-bottom: 0.25rem;
}

.upload-text {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--c-text-dark);
}

.upload-browse {
  color: var(--c-primary);
  font-weight: 700;
  text-decoration: underline;
}

.upload-hint {
  font-size: 0.75rem;
  color: var(--c-text-muted);
}

.file-preview {
  position: relative;
  display: inline-block;
  max-width: 180px;
  max-height: 140px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  margin-top: 0.5rem;
}

.file-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.file-remove-btn {
  position: absolute;
  top: 0.375rem;
  right: 0.375rem;
  width: 1.75rem;
  height: 1.75rem;
  background-color: rgba(0, 0, 0, 0.75);
  color: var(--c-white);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast);
  z-index: 3;
}

.file-remove-btn:hover {
  background-color: var(--c-primary);
}

/* Submit Area */
.form-submit {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
}

.form-notice {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--c-text-muted);
  text-align: center;
}

.form-notice svg,
.form-notice i {
  color: var(--c-primary);
}

.btn-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  width: 100%;
  max-width: 360px;
  padding: 1rem 2rem;
  font-family: var(--font-heading);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--c-white);
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-dark));
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-red-glow);
  transition: all var(--transition);
}

.btn-submit:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 14px 28px -4px rgba(229, 57, 53, 0.55);
}

.btn-submit:active:not(:disabled) {
  transform: translateY(0);
}

.btn-submit:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

/* ==========================================================================
   LOOKUP TAB
   ========================================================================== */
.lookup-form {
  max-width: 600px;
  margin: 0 auto 2.5rem;
}

.lookup-input-group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

@media (min-width: 640px) {
  .lookup-input-group {
    flex-direction: row;
  }
}

.lookup-input-wrapper {
  position: relative;
  flex: 1;
}

.lookup-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--c-gray-400);
  pointer-events: none;
}

.lookup-input {
  width: 100%;
  padding: 0.875rem 1rem 0.875rem 2.75rem;
  font-size: 1rem;
  color: var(--c-text-dark);
  background-color: var(--c-white);
  border: 1.5px solid var(--c-gray-300);
  border-radius: var(--radius-xl);
  transition: all var(--transition-fast);
  outline: none;
}

.lookup-input:focus {
  border-color: var(--c-primary);
  box-shadow: var(--shadow-focus);
}

.btn-lookup {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  font-family: var(--font-heading);
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--c-white);
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-dark));
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-lookup:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-lookup:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

/* Lookup Results */
.lookup-results {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  max-width: 720px;
  margin: 0 auto;
}

.result-card {
  background-color: var(--c-white);
  border: 1.5px solid var(--c-gray-200);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  box-shadow: var(--shadow-md);
  animation: fadeInUp 0.4s var(--ease-out);
}

.result-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--c-gray-200);
  margin-bottom: 1.25rem;
}

.result-product-name {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--c-text-dark);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.875rem;
  font-size: 0.8125rem;
  font-weight: 700;
  border-radius: var(--radius-full);
}

.badge-active {
  background-color: var(--c-success-bg);
  color: var(--c-success);
  border: 1px solid rgba(22, 163, 74, 0.25);
}

.badge-expired {
  background-color: var(--c-error-bg);
  color: var(--c-error);
  border: 1px solid rgba(220, 38, 38, 0.25);
}

.result-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 640px) {
  .result-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.result-item {
  display: flex;
  flex-direction: column;
}

.result-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--c-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.result-value {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--c-text-dark);
  margin-top: 0.125rem;
}

/* Empty State */
.lookup-empty {
  text-align: center;
  padding: 3rem 1.5rem;
  max-width: 440px;
  margin: 0 auto;
}

.lookup-empty svg,
.lookup-empty i {
  color: var(--c-gray-400);
  margin-bottom: 1rem;
}

.lookup-empty h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--c-text-dark);
  margin-bottom: 0.5rem;
}

.lookup-empty p {
  font-size: 0.875rem;
  color: var(--c-text-muted);
}

/* ==========================================================================
   WARRANTY POLICY ACCORDIONS
   ========================================================================== */
.policy-section {
  padding: 4rem 0;
  background-color: var(--c-white);
  border-top: 1px solid var(--c-gray-200);
}

@media (min-width: 768px) {
  .policy-section {
    padding: 5rem 0;
  }
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 3rem;
}

.section-badge {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--c-primary);
  background-color: rgba(229, 57, 53, 0.08);
  padding: 0.25rem 0.875rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.75rem;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--c-text-dark);
  margin-bottom: 0.75rem;
}

@media (min-width: 640px) {
  .section-title {
    font-size: 2.25rem;
  }
}

.section-desc {
  font-size: 0.9375rem;
  color: var(--c-text-muted);
}

.policy-grid {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.accordion-item {
  border: 1.5px solid var(--c-gray-200);
  border-radius: var(--radius-xl);
  overflow: hidden;
  background-color: var(--c-bg);
  transition: all var(--transition);
}

.accordion-item:hover {
  border-color: rgba(229, 57, 53, 0.3);
  box-shadow: var(--shadow-md);
}

.accordion-item.active {
  border-color: var(--c-primary);
  background-color: var(--c-white);
  box-shadow: var(--shadow-lg);
}

.accordion-header {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  text-align: left;
  background: none;
  border: none;
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-text-dark);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.accordion-item.active .accordion-header {
  color: var(--c-primary-dark);
}

.accordion-icon-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-lg);
  background-color: var(--c-white);
  color: var(--c-primary);
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.accordion-item.active .accordion-icon-wrap {
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-dark));
  color: var(--c-white);
}

.accordion-title {
  flex: 1;
  font-family: var(--font-heading);
}

.accordion-chevron {
  color: var(--c-gray-400);
  transition: transform var(--transition);
}

.accordion-item.active .accordion-chevron {
  transform: rotate(180deg);
  color: var(--c-primary);
}

.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease-out);
  padding: 0 1.5rem;
}

.accordion-item.active .accordion-body {
  padding: 0 1.5rem 1.5rem;
}

.policy-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding-left: 0.5rem;
  font-size: 0.9375rem;
  color: var(--c-text-body);
}

.policy-list li {
  position: relative;
  padding-left: 1.5rem;
}

.policy-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background-color: var(--c-primary);
}

/* Steps */
.steps-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.step-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.step-number {
  width: 2rem;
  height: 2rem;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-dark));
  color: var(--c-white);
  font-weight: 800;
  font-size: 0.875rem;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 0.125rem;
}

.step-content strong {
  display: block;
  font-family: var(--font-heading);
  color: var(--c-text-dark);
  font-size: 0.9375rem;
  margin-bottom: 0.25rem;
}

.step-content p {
  font-size: 0.875rem;
  color: var(--c-text-muted);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  background-color: var(--c-black);
  color: var(--c-gray-400);
  padding: 3.5rem 0 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1.5rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.footer-logo {
  height: 2.25rem;
  width: auto;
  filter: brightness(0) invert(1);
}

.footer-tagline {
  font-size: 0.875rem;
  color: var(--c-gray-400);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  font-size: 0.875rem;
}

.footer-links a {
  color: var(--c-gray-300);
  transition: color var(--transition-fast);
}

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

.footer-divider {
  color: rgba(255, 255, 255, 0.2);
}

.footer-copyright {
  font-size: 0.8125rem;
  color: var(--c-gray-500);
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  width: 100%;
}

/* ==========================================================================
   FLOATING ELEMENTS & TOASTS
   ========================================================================== */
.floating-actions {
  position: fixed;
  bottom: 5.5rem;
  right: 1.25rem;
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.floating-btn {
  width: 3.25rem;
  height: 3.25rem;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-xl);
  color: var(--c-white);
  transition: all var(--transition);
}

.floating-btn:hover {
  transform: scale(1.08);
}

.floating-zalo {
  background-color: #0068ff;
  font-weight: 800;
  font-size: 0.75rem;
}

.floating-phone {
  background-color: var(--c-primary);
  animation: pulseGlow 2s infinite;
}

.back-to-top {
  position: fixed;
  bottom: 1.5rem;
  right: 1.25rem;
  width: 2.75rem;
  height: 2.75rem;
  background-color: var(--c-black);
  color: var(--c-white);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: all var(--transition);
  z-index: 90;
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

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

/* Toast */
.toast-container {
  position: fixed;
  top: 5rem;
  right: 1.25rem;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  padding: 0.875rem 1.25rem;
  border-radius: var(--radius-lg);
  font-size: 0.9375rem;
  font-weight: 600;
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  opacity: 0;
  transform: translateX(100%);
  transition: all 0.3s var(--ease-out);
  max-width: 380px;
}

.toast.show {
  opacity: 1;
  transform: translateX(0);
}

.toast-success {
  background-color: #064e3b;
  color: #ecfdf5;
  border: 1px solid #059669;
}

.toast-error {
  background-color: #7f1d1d;
  color: #fef2f2;
  border: 1px solid #dc2626;
}

/* Spinner */
.spinner {
  width: 1.25rem;
  height: 1.25rem;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulseGlow {
  0% {
    box-shadow: 0 0 0 0 rgba(229, 57, 53, 0.6);
  }
  70% {
    box-shadow: 0 0 0 12px rgba(229, 57, 53, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(229, 57, 53, 0);
  }
}