/* ==========================================================================
   Hong Kong Broadband Quotation Directory - Main Stylesheet
   Bilingual: Traditional Chinese (zh-HK) + English (en)
   ========================================================================== */

/* ==========================================================================
   1. CSS Custom Properties / Theming
   ========================================================================== */

:root {
  /* Brand Colors */
  --color-primary: #d4920b;
  --color-primary-light: #f5c842;
  --color-primary-dark: #a67308;
  --color-primary-bg: #fdf6e3;

  /* Hero / Warm Amber-Gold */
  --color-hero-bg: linear-gradient(135deg, #d4920b 0%, #f5c842 50%, #e8a917 100%);
  --color-hero-text: #ffffff;
  --color-hero-overlay: rgba(0, 0, 0, 0.25);

  /* Accent Colors */
  --color-blue: #2563eb;
  --color-blue-light: #dbeafe;
  --color-blue-dark: #1d4ed8;
  --color-green: #16a34a;
  --color-green-light: #dcfce7;
  --color-green-dark: #15803d;
  --color-red: #dc2626;
  --color-red-light: #fee2e2;
  --color-orange: #ea580c;
  --color-orange-light: #fff7ed;
  --color-purple: #7c3aed;
  --color-purple-light: #ede9fe;

  /* WhatsApp */
  --color-whatsapp: #25d366;
  --color-whatsapp-dark: #128c7e;

  /* Neutrals */
  --color-white: #ffffff;
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;

  /* Speed Tier Colors */
  --color-speed-100: #9ca3af;
  --color-speed-200: #60a5fa;
  --color-speed-500: #2563eb;
  --color-speed-1000: #16a34a;
  --color-speed-2000: #7c3aed;
  --color-speed-2500: #dc2626;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC",
    "PingFang TC", "Microsoft JhengHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;

  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.75;

  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
    0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
    0 8px 10px -6px rgba(0, 0, 0, 0.1);

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius: 0.5rem;
  --radius-md: 0.625rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1200px;
  --container-2xl: 1400px;

  /* Z-Index */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-whatsapp: 900;
  --z-toast: 1000;
}

/* ==========================================================================
   2. Reset & Base
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-gray-800);
  background-color: var(--color-gray-50);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Chinese text adjustments */
[lang="zh-HK"] body,
.zh-HK {
  line-height: var(--leading-relaxed);
  letter-spacing: var(--tracking-wide);
}

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

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

a:hover {
  color: var(--color-blue-dark);
  text-decoration: underline;
}

ul,
ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  font-size: inherit;
}

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

/* ==========================================================================
   3. Utility / Layout
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-6);
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 var(--space-8);
  }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-center {
  text-align: center;
}

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

.section {
  padding: var(--space-12) 0;
}

@media (min-width: 768px) {
  .section {
    padding: var(--space-16) 0;
  }
}

.section-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--space-6);
}

@media (min-width: 768px) {
  .section-title {
    font-size: var(--text-3xl);
  }
}

/* ==========================================================================
   4. Header / Navigation
   ========================================================================== */

.site-header {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-200);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  transition: box-shadow var(--transition-base);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

@media (min-width: 768px) {
  .header-inner {
    height: 64px;
  }
}

.header-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-gray-900);
  text-decoration: none;
}

.header-logo:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.header-logo-icon {
  width: 32px;
  height: 32px;
  background: var(--color-primary);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: var(--text-sm);
  font-weight: 700;
}

.header-nav {
  display: none;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .header-nav {
    display: flex;
  }
}

.header-nav a {
  color: var(--color-gray-600);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: color var(--transition-fast);
  text-decoration: none;
}

.header-nav a:hover,
.header-nav a.active {
  color: var(--color-primary);
  text-decoration: none;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.lang-switcher {
  display: flex;
  align-items: center;
  background: var(--color-gray-100);
  border-radius: var(--radius-full);
  padding: 2px;
  font-size: var(--text-sm);
}

.lang-switcher button {
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-weight: 500;
  color: var(--color-gray-500);
  transition: all var(--transition-fast);
  font-size: var(--text-sm);
}

.lang-switcher button.active {
  background: var(--color-white);
  color: var(--color-gray-900);
  box-shadow: var(--shadow-sm);
}

.header-phone {
  display: none;
  align-items: center;
  gap: var(--space-1);
  color: var(--color-primary);
  font-weight: 600;
  font-size: var(--text-sm);
  text-decoration: none;
}

@media (min-width: 1024px) {
  .header-phone {
    display: flex;
  }
}

.header-phone:hover {
  color: var(--color-primary-dark);
  text-decoration: none;
}

/* Mobile menu toggle */
.mobile-menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--color-gray-600);
}

@media (min-width: 768px) {
  .mobile-menu-btn {
    display: none;
  }
}

.mobile-menu-btn svg {
  width: 24px;
  height: 24px;
}

/* Mobile Menu Overlay */
.mobile-menu {
  display: none;
  position: fixed;
  top: 56px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-white);
  z-index: var(--z-fixed);
  padding: var(--space-4);
  overflow-y: auto;
}

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

.mobile-menu a {
  display: block;
  padding: var(--space-3) var(--space-4);
  color: var(--color-gray-700);
  font-size: var(--text-lg);
  font-weight: 500;
  border-bottom: 1px solid var(--color-gray-100);
  text-decoration: none;
}

.mobile-menu a:hover {
  color: var(--color-primary);
  background: var(--color-primary-bg);
  text-decoration: none;
}

.mobile-menu .mobile-phone {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
  padding: var(--space-4);
  background: var(--color-primary-bg);
  border-radius: var(--radius-lg);
  color: var(--color-primary);
  font-weight: 600;
}

/* ==========================================================================
   5. Hero Section
   ========================================================================== */

.hero {
  background: var(--color-hero-bg);
  color: var(--color-hero-text);
  padding: var(--space-12) 0;
  position: relative;
  overflow: hidden;
}

@media (min-width: 768px) {
  .hero {
    padding: var(--space-16) 0;
  }
}

@media (min-width: 1024px) {
  .hero {
    padding: var(--space-20) 0;
  }
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-hero-overlay);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.hero-title {
  font-size: var(--text-3xl);
  font-weight: 800;
  line-height: var(--leading-tight);
  margin-bottom: var(--space-4);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
}

@media (min-width: 768px) {
  .hero-title {
    font-size: var(--text-4xl);
  }
}

@media (min-width: 1024px) {
  .hero-title {
    font-size: var(--text-5xl);
  }
}

.hero-subtitle {
  font-size: var(--text-lg);
  opacity: 0.95;
  margin-bottom: var(--space-8);
  font-weight: 400;
}

@media (min-width: 768px) {
  .hero-subtitle {
    font-size: var(--text-xl);
  }
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(4px);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
}

.hero-badge svg {
  width: 16px;
  height: 16px;
}

/* Hero Search Bar */
.hero-search {
  max-width: 600px;
  margin: 0 auto;
}

.search-wrapper {
  position: relative;
  background: var(--color-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  display: flex;
  align-items: center;
}

.search-wrapper .search-icon {
  position: absolute;
  left: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-gray-400);
  pointer-events: none;
}

.search-wrapper .search-icon svg {
  width: 20px;
  height: 20px;
}

.search-input {
  width: 100%;
  padding: var(--space-4) var(--space-4) var(--space-4) var(--space-12);
  border: none;
  outline: none;
  font-size: var(--text-base);
  color: var(--color-gray-800);
  background: transparent;
}

@media (min-width: 768px) {
  .search-input {
    font-size: var(--text-lg);
    padding: var(--space-5) var(--space-5) var(--space-5) var(--space-12);
  }
}

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

.search-btn {
  flex-shrink: 0;
  padding: var(--space-3) var(--space-5);
  margin: var(--space-2);
  background: var(--color-primary);
  color: var(--color-white);
  font-weight: 600;
  font-size: var(--text-sm);
  border-radius: var(--radius-lg);
  transition: background var(--transition-fast);
  white-space: nowrap;
}

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

/* Search Results Dropdown */
.search-results {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-white);
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  box-shadow: var(--shadow-xl);
  max-height: 320px;
  overflow-y: auto;
  z-index: var(--z-dropdown);
  display: none;
}

.search-results.open {
  display: block;
}

.search-result-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  color: var(--color-gray-700);
  cursor: pointer;
  transition: background var(--transition-fast);
  text-decoration: none;
  border-bottom: 1px solid var(--color-gray-100);
}

.search-result-item:last-child {
  border-bottom: none;
}

.search-result-item:hover {
  background: var(--color-gray-50);
  text-decoration: none;
}

.search-result-item .result-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  background: var(--color-blue-light);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-blue);
}

.search-result-item .result-text {
  flex: 1;
  min-width: 0;
}

.search-result-item .result-name {
  font-weight: 600;
  font-size: var(--text-sm);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.search-result-item .result-address {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ==========================================================================
   6. Breadcrumbs
   ========================================================================== */

.breadcrumb {
  padding: var(--space-4) 0;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-100);
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-gray-500);
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.breadcrumb-item a {
  color: var(--color-gray-500);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumb-item a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.breadcrumb-item.active {
  color: var(--color-gray-800);
  font-weight: 500;
}

.breadcrumb-sep {
  color: var(--color-gray-300);
  font-size: var(--text-xs);
  margin: 0 var(--space-1);
}

.breadcrumb-sep svg {
  width: 14px;
  height: 14px;
}

/* ==========================================================================
   7. Search Bar (Standalone Page)
   ========================================================================== */

.search-bar {
  background: var(--color-white);
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-gray-200);
  position: sticky;
  top: 56px;
  z-index: var(--z-sticky);
}

@media (min-width: 768px) {
  .search-bar {
    top: 64px;
    padding: var(--space-4) var(--space-6);
  }
}

.search-bar .search-wrapper {
  max-width: 600px;
  margin: 0 auto;
  border: 2px solid var(--color-gray-200);
  box-shadow: var(--shadow-sm);
}

.search-bar .search-wrapper:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(212, 146, 11, 0.15);
}

/* ==========================================================================
   8. District Cards
   ========================================================================== */

.district-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

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

@media (min-width: 1024px) {
  .district-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.region-group {
  margin-bottom: var(--space-8);
}

.region-title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-gray-700);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 2px solid var(--color-primary);
  display: inline-block;
}

.district-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow);
  border: 1px solid var(--color-gray-100);
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

.district-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
  transform: translateY(-2px);
  text-decoration: none;
  color: inherit;
}

.district-card-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: var(--color-primary-bg);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: var(--text-xl);
}

.district-card-content {
  flex: 1;
  min-width: 0;
}

.district-card-name {
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--color-gray-900);
  margin-bottom: var(--space-1);
}

.district-card-count {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
}

.district-card-arrow {
  flex-shrink: 0;
  color: var(--color-gray-400);
  transition: transform var(--transition-fast), color var(--transition-fast);
}

.district-card:hover .district-card-arrow {
  transform: translateX(4px);
  color: var(--color-primary);
}

.district-card-arrow svg {
  width: 20px;
  height: 20px;
}

/* ==========================================================================
   9. Building Cards
   ========================================================================== */

.building-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

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

@media (min-width: 1024px) {
  .building-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.building-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow);
  border: 1px solid var(--color-gray-100);
  transition: all var(--transition-base);
  display: block;
  text-decoration: none;
  color: inherit;
}

.building-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--color-blue-light);
  transform: translateY(-2px);
  text-decoration: none;
  color: inherit;
}

.building-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--space-3);
}

.building-card-name {
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--color-gray-900);
  line-height: var(--leading-tight);
}

.building-card-name-en {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  margin-top: var(--space-1);
  font-weight: 400;
}

.building-card-address {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  margin-bottom: var(--space-3);
  line-height: var(--leading-relaxed);
}

.building-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.building-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-gray-100);
}

.building-card-price {
  font-size: var(--text-sm);
  color: var(--color-green-dark);
  font-weight: 600;
}

.building-card-cta {
  font-size: var(--text-sm);
  color: var(--color-blue);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.building-card-cta svg {
  width: 16px;
  height: 16px;
}

/* ==========================================================================
   10. Broadband Plan Cards
   ========================================================================== */

.plan-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

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

@media (min-width: 1024px) {
  .plan-cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.plan-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--color-gray-100);
  transition: all var(--transition-base);
  position: relative;
}

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

.plan-card.popular {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md), 0 0 0 1px var(--color-primary);
}

.plan-card-popular-label {
  position: absolute;
  top: 0;
  right: var(--space-4);
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: 0 0 var(--radius) var(--radius);
}

.plan-card-provider {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-gray-100);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.plan-card-provider-logo {
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  background: var(--color-gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--text-xs);
  color: var(--color-gray-600);
  overflow: hidden;
}

.plan-card-provider-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.plan-card-provider-name {
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--color-gray-800);
}

.plan-card-body {
  padding: var(--space-5);
}

.plan-card-speed {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.plan-card-speed-value {
  font-size: var(--text-3xl);
  font-weight: 800;
  line-height: 1;
  letter-spacing: var(--tracking-tight);
}

.plan-card-speed-unit {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-gray-500);
}

/* Speed color classes */
.speed-100 .plan-card-speed-value {
  color: var(--color-speed-100);
}
.speed-200 .plan-card-speed-value {
  color: var(--color-speed-200);
}
.speed-500 .plan-card-speed-value {
  color: var(--color-speed-500);
}
.speed-1000 .plan-card-speed-value {
  color: var(--color-speed-1000);
}
.speed-2000 .plan-card-speed-value {
  color: var(--color-speed-2000);
}
.speed-2500 .plan-card-speed-value {
  color: var(--color-speed-2500);
}

.plan-card-price {
  margin-bottom: var(--space-4);
}

.plan-card-price-amount {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-gray-900);
}

.plan-card-price-currency {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-gray-500);
}

.plan-card-price-period {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
}

.plan-card-details {
  list-style: none;
  margin-bottom: var(--space-5);
}

.plan-card-details li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  border-bottom: 1px solid var(--color-gray-50);
}

.plan-card-details li:last-child {
  border-bottom: none;
}

.plan-card-details li .check-icon {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  color: var(--color-green);
}

.plan-card-promo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  background: var(--color-orange-light);
  color: var(--color-orange);
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.plan-card-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.plan-card-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.plan-card-cta.primary {
  background: var(--color-whatsapp);
  color: var(--color-white);
}

.plan-card-cta.primary:hover {
  background: var(--color-whatsapp-dark);
  text-decoration: none;
}

.plan-card-cta.secondary {
  background: var(--color-gray-100);
  color: var(--color-gray-700);
}

.plan-card-cta.secondary:hover {
  background: var(--color-gray-200);
  text-decoration: none;
}

.plan-card-cta svg {
  width: 18px;
  height: 18px;
}

/* ==========================================================================
   11. Speed Badges
   ========================================================================== */

.speed-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  white-space: nowrap;
}

.speed-badge.speed-tier-100 {
  background: #f3f4f6;
  color: #6b7280;
}

.speed-badge.speed-tier-200 {
  background: #dbeafe;
  color: #2563eb;
}

.speed-badge.speed-tier-500 {
  background: #c7d2fe;
  color: #4338ca;
}

.speed-badge.speed-tier-1000 {
  background: var(--color-green-light);
  color: var(--color-green-dark);
}

.speed-badge.speed-tier-2000 {
  background: var(--color-purple-light);
  color: var(--color-purple);
}

.speed-badge.speed-tier-2500 {
  background: var(--color-red-light);
  color: var(--color-red);
}

/* Generic badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
}

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

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

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

.badge-gray {
  background: var(--color-gray-100);
  color: var(--color-gray-600);
}

/* ==========================================================================
   12. FAQ Accordion
   ========================================================================== */

.faq-section {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid var(--color-gray-100);
  overflow: hidden;
}

.faq-item {
  border-bottom: 1px solid var(--color-gray-100);
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5);
  text-align: left;
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-gray-800);
  transition: background var(--transition-fast);
  cursor: pointer;
  gap: var(--space-4);
}

.faq-question:hover {
  background: var(--color-gray-50);
}

.faq-question .faq-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  transition: transform var(--transition-base);
  color: var(--color-gray-400);
}

.faq-item.open .faq-question .faq-icon {
  transform: rotate(180deg);
  color: var(--color-primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow), padding var(--transition-slow);
}

.faq-item.open .faq-answer {
  max-height: 500px;
}

.faq-answer-inner {
  padding: 0 var(--space-5) var(--space-5);
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  line-height: var(--leading-relaxed);
}

.faq-answer-inner p {
  margin-bottom: var(--space-3);
}

.faq-answer-inner p:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   13. Footer
   ========================================================================== */

.site-footer {
  background: var(--color-gray-900);
  color: var(--color-gray-400);
  padding: var(--space-12) 0 var(--space-6);
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

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

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

.footer-brand {
  max-width: 300px;
}

.footer-brand .footer-logo {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-3);
}

.footer-brand p {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

.footer-col-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links li {
  margin-bottom: var(--space-2);
}

.footer-links a {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  transition: color var(--transition-fast);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--color-white);
  text-decoration: none;
}

.footer-contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  margin-bottom: var(--space-3);
}

.footer-contact-item a {
  color: var(--color-gray-400);
  text-decoration: none;
}

.footer-contact-item a:hover {
  color: var(--color-primary-light);
  text-decoration: none;
}

.footer-contact-item svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--color-gray-500);
}

.footer-bottom {
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-gray-800);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  align-items: center;
  text-align: center;
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer-copyright {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
}

.footer-disclaimer {
  font-size: var(--text-xs);
  color: var(--color-gray-600);
  max-width: 600px;
}

/* ==========================================================================
   14. Floating WhatsApp Button
   ========================================================================== */

.whatsapp-float {
  position: fixed;
  bottom: var(--space-5);
  right: var(--space-5);
  z-index: var(--z-whatsapp);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-whatsapp);
  color: var(--color-white);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  box-shadow: 0 4px 14px rgba(37, 211, 102, 0.4);
  text-decoration: none;
  font-weight: 600;
  font-size: var(--text-sm);
  transition: all var(--transition-base);
  animation: whatsapp-pulse 2s ease-in-out 1s 3;
}

.whatsapp-float:hover {
  background: var(--color-whatsapp-dark);
  transform: scale(1.05);
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.5);
  text-decoration: none;
  color: var(--color-white);
}

.whatsapp-float svg {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.whatsapp-float-text {
  display: none;
}

@media (min-width: 768px) {
  .whatsapp-float-text {
    display: inline;
  }
}

@keyframes whatsapp-pulse {
  0% {
    box-shadow: 0 4px 14px rgba(37, 211, 102, 0.4);
  }
  50% {
    box-shadow: 0 4px 14px rgba(37, 211, 102, 0.4),
      0 0 0 10px rgba(37, 211, 102, 0);
  }
  100% {
    box-shadow: 0 4px 14px rgba(37, 211, 102, 0.4),
      0 0 0 20px rgba(37, 211, 102, 0);
  }
}

/* ==========================================================================
   15. Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  border: none;
}

.btn:hover {
  text-decoration: none;
}

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

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

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

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

.btn-outline {
  background: transparent;
  border: 2px solid var(--color-gray-200);
  color: var(--color-gray-700);
}

.btn-outline:hover {
  border-color: var(--color-gray-300);
  background: var(--color-gray-50);
  color: var(--color-gray-800);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
  border-radius: var(--radius-xl);
}

.btn-sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
}

.btn svg {
  width: 18px;
  height: 18px;
}

/* ==========================================================================
   16. Loading States / Skeleton
   ========================================================================== */

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-gray-200) 25%,
    var(--color-gray-100) 50%,
    var(--color-gray-200) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius);
}

@keyframes skeleton-shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

.skeleton-text {
  height: 1em;
  margin-bottom: var(--space-2);
}

.skeleton-text.short {
  width: 60%;
}

.skeleton-text.medium {
  width: 80%;
}

.skeleton-heading {
  height: 1.5em;
  width: 50%;
  margin-bottom: var(--space-3);
}

.skeleton-card {
  height: 200px;
}

.skeleton-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
}

/* Loading spinner */
.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-gray-200);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loading-overlay {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-16) 0;
  gap: var(--space-4);
  color: var(--color-gray-500);
  font-size: var(--text-sm);
}

/* ==========================================================================
   17. Empty / Error States
   ========================================================================== */

.empty-state {
  text-align: center;
  padding: var(--space-16) var(--space-4);
}

.empty-state-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-4);
  color: var(--color-gray-300);
}

.empty-state-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-gray-700);
  margin-bottom: var(--space-2);
}

.empty-state-text {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  max-width: 400px;
  margin: 0 auto;
}

/* ==========================================================================
   18. Nearby Buildings
   ========================================================================== */

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

.nearby-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

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

@media (min-width: 1024px) {
  .nearby-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.nearby-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-100);
  transition: all var(--transition-base);
  text-decoration: none;
  color: inherit;
  display: block;
}

.nearby-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-blue-light);
  text-decoration: none;
  color: inherit;
}

.nearby-card-name {
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--color-gray-800);
  margin-bottom: var(--space-1);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nearby-card-address {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  margin-bottom: var(--space-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nearby-card-price {
  font-size: var(--text-xs);
  color: var(--color-green-dark);
  font-weight: 600;
}

/* ==========================================================================
   19. Building Detail Page
   ========================================================================== */

.building-detail-header {
  background: var(--color-white);
  padding: var(--space-6) 0;
  border-bottom: 1px solid var(--color-gray-200);
}

.building-detail-title {
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-gray-900);
  margin-bottom: var(--space-2);
}

@media (min-width: 768px) {
  .building-detail-title {
    font-size: var(--text-3xl);
  }
}

.building-detail-address {
  font-size: var(--text-base);
  color: var(--color-gray-500);
  margin-bottom: var(--space-4);
}

.building-detail-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.building-detail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

/* Plan filter tabs */
.plan-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-gray-200);
}

.plan-filter-btn {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-gray-500);
  background: var(--color-gray-100);
  transition: all var(--transition-fast);
}

.plan-filter-btn:hover {
  background: var(--color-gray-200);
  color: var(--color-gray-700);
}

.plan-filter-btn.active {
  background: var(--color-primary);
  color: var(--color-white);
}

/* ==========================================================================
   20. Pagination
   ========================================================================== */

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-8) 0;
}

.pagination-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 var(--space-3);
  border-radius: var(--radius);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-gray-600);
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  transition: all var(--transition-fast);
}

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

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

.pagination-btn:disabled {
  opacity: 0.5;
  pointer-events: none;
}

.pagination-btn svg {
  width: 16px;
  height: 16px;
}

/* ==========================================================================
   21. Provider Logos (fallback color squares)
   ========================================================================== */

.provider-logo {
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--text-xs);
  color: var(--color-white);
}

.provider-logo-hkbn {
  background: #e31837;
}

.provider-logo-hkt {
  background: #00a651;
}

.provider-logo-cmhk {
  background: #0066b3;
}

.provider-logo-hgc {
  background: #f7941d;
}

.provider-logo-icable {
  background: #003366;
}

/* ==========================================================================
   22. Comparison Summary Bar
   ========================================================================== */

.comparison-bar {
  background: var(--color-primary-bg);
  border: 1px solid var(--color-primary-light);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-5);
  margin-bottom: var(--space-6);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.comparison-stat {
  text-align: center;
}

.comparison-stat-value {
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-primary-dark);
}

.comparison-stat-label {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
}

/* ==========================================================================
   23. Print Styles
   ========================================================================== */

@media print {
  .site-header,
  .whatsapp-float,
  .search-bar,
  .mobile-menu,
  .site-footer {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  .plan-card,
  .building-card,
  .district-card {
    box-shadow: none;
    border: 1px solid #ccc;
    break-inside: avoid;
  }
}

/* ==========================================================================
   24. Focus / Accessibility
   ========================================================================== */

*:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip-link:focus {
  position: fixed;
  top: var(--space-2);
  left: var(--space-2);
  width: auto;
  height: auto;
  padding: var(--space-3) var(--space-5);
  background: var(--color-primary);
  color: var(--color-white);
  font-weight: 600;
  border-radius: var(--radius);
  z-index: var(--z-toast);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html {
    scroll-behavior: auto;
  }
}