/* ==========================================================================
   PLAYER-Cs TEACHER LEARNING HUB & BOOK LAUNCH DESIGN SYSTEM
   100% Unified & Cohesive Design Palette Derived Exclusively from Official Logo
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. UNIFIED LOGO-BASED DESIGN TOKENS
   -------------------------------------------------------------------------- */
:root {
  /* Dominant Brand Palette (Extracted 100% from Official Logo) */
  --color-brand-navy: #1D3B73;         /* Main headings, footer, primary authority */
  --color-brand-navy-dark: #12254B;    /* Sub-footer & deep overlays */
  --color-brand-navy-light: #EEF3FA;   /* Soft navy background tint */

  --color-brand-teal: #56B9B0;         /* Primary accent, tabs, active pills, links */
  --color-brand-teal-dark: #3B9990;    /* Teal hover states */
  --color-brand-teal-light: #EBF7F6;   /* Callout background tint */
  --color-brand-teal-tint: rgba(86, 185, 176, 0.12);

  --color-brand-orange: #EF8D49;       /* Primary Action CTAs ("Order Book", "Buy Now") */
  --color-brand-orange-hover: #D87532; /* Orange hover state */
  --color-brand-orange-light: #FFF4EC; /* Soft orange badge background */
  --color-brand-orange-tint: rgba(239, 141, 73, 0.12);

  --color-brand-green: #74C043;        /* Secondary highlights, checkmarks, badges */
  --color-brand-green-dark: #589C2B;   
  --color-brand-green-light: #F2F9EC;  /* Soft green tint */

  /* WhatsApp Direct Accent */
  --color-whatsapp: #25D366;
  --color-whatsapp-hover: #1EBE5B;
  --color-whatsapp-shadow: rgba(37, 211, 102, 0.35);

  /* Clean Neutrals & Surfaces */
  --color-text-main: #1E293B;          /* Deep slate for crisp body copy */
  --color-text-secondary: #475569;     /* Secondary copy */
  --color-text-muted: #64748B;        /* Metadata, timestamps */
  --color-surface-white: #FFFFFF;      /* Clean white card surface */
  --color-surface-offwhite: #F8FAFC;   /* Light gray-blue alternate strips */
  --color-surface-neutral: #F1F5F9;    /* Neutral divider background */
  --color-border: #E2E8F0;             /* Card borders */
  --color-border-subtle: #F1F5F9;

  /* Typography Fonts */
  --font-heading: 'Merriweather', Georgia, serif;
  --font-body: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Spacing Scale */
  --space-xs: 0.25rem;  /* 4px */
  --space-sm: 0.5rem;   /* 8px */
  --space-md: 1rem;     /* 16px */
  --space-lg: 1.5rem;   /* 24px */
  --space-xl: 2.5rem;   /* 40px */
  --space-2xl: 4.5rem;  /* 72px */

  /* Border Radii */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows (Soft Ambient Elevation) */
  --shadow-subtle: 0 2px 8px rgba(29, 59, 115, 0.04);
  --shadow-card: 0 10px 30px -5px rgba(29, 59, 115, 0.08), 0 4px 12px rgba(0, 0, 0, 0.02);
  --shadow-hover: 0 20px 40px -10px rgba(29, 59, 115, 0.16), 0 8px 16px rgba(0, 0, 0, 0.03);
  --shadow-orange-glow: 0 8px 24px -4px rgba(239, 141, 73, 0.35);
  --shadow-teal-glow: 0 8px 24px -4px rgba(86, 185, 176, 0.35);

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --------------------------------------------------------------------------
   2. GLOBAL RESET & BASE STYLES
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  color: var(--color-text-main);
  background-color: var(--color-surface-white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a {
  color: var(--color-brand-navy);
  text-decoration: none;
  transition: all var(--transition-fast);
}

a:hover {
  color: var(--color-brand-teal-dark);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-brand-navy);
  line-height: 1.3;
  margin-bottom: 0.85rem;
  letter-spacing: -0.01em;
}

h1 { font-size: 3rem; font-weight: 700; }
h2 { font-size: 2.25rem; font-weight: 700; }
h3 { font-size: 1.5rem; font-weight: 700; }
h4 { font-size: 1.2rem; font-weight: 700; }

p {
  margin-bottom: 1.25rem;
  color: var(--color-text-secondary);
}

/* --------------------------------------------------------------------------
   3. LAYOUT CONTAINERS & GRID
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-md);
  padding-right: var(--space-md);
}

.section {
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-2xl);
  position: relative;
}

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

.section--soft-teal {
  background: linear-gradient(180deg, var(--color-brand-teal-light) 0%, #FFFFFF 100%);
}

.section--soft-orange {
  background: linear-gradient(180deg, var(--color-brand-orange-light) 0%, #FFFFFF 100%);
}

.section--navy {
  background-color: var(--color-brand-navy);
  color: var(--color-surface-white);
}

.section--navy h1, 
.section--navy h2, 
.section--navy h3, 
.section--navy p {
  color: var(--color-surface-white);
}

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

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

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

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  h1 { font-size: 2.25rem; }
  h2 { font-size: 1.85rem; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section { padding-top: var(--space-xl); padding-bottom: var(--space-xl); }
}

/* --------------------------------------------------------------------------
   4. BUTTONS & UNIFIED PILL BADGES
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.75rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  box-shadow: var(--shadow-subtle);
}

/* Primary Action CTA (Orange from Logo) */
.btn-primary,
.btn-orange {
  background-color: var(--color-brand-orange);
  color: var(--color-surface-white) !important;
}

.btn-primary:hover,
.btn-orange:hover {
  background-color: var(--color-brand-orange-hover);
  color: var(--color-surface-white) !important;
  transform: translateY(-2px);
  box-shadow: var(--shadow-orange-glow);
}

/* Secondary Teal Button */
.btn-secondary {
  background-color: var(--color-brand-teal);
  color: var(--color-surface-white);
}

.btn-secondary:hover {
  background-color: var(--color-brand-teal-dark);
  color: var(--color-surface-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-teal-glow);
}

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

.btn-outline:hover {
  background-color: var(--color-brand-navy);
  color: var(--color-surface-white);
  transform: translateY(-2px);
}

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

.btn-whatsapp:hover {
  background-color: var(--color-whatsapp-hover);
  color: var(--color-surface-white);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--color-whatsapp-shadow);
}

.btn-sm {
  padding: 0.45rem 1.1rem;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 1.1rem 2.25rem;
  font-size: 1.05rem;
}

/* Badges matching brand logo colors */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.95rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-radius: var(--radius-full);
}

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

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

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

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

/* --------------------------------------------------------------------------
   5. HEADER & BRAND LOGO NAVIGATION
   -------------------------------------------------------------------------- */
.site-header {
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.top-bar {
  background: var(--color-brand-navy);
  color: var(--color-surface-white);
  font-size: 0.85rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.top-bar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.top-bar a.btn-orange,
.top-bar a.btn {
  background-color: var(--color-brand-orange) !important;
  color: #ffffff !important;
  font-weight: 600;
  display: inline-block;
  box-shadow: 0 4px 12px rgba(239, 141, 73, 0.4);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 78px;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-brand-navy);
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
}

.logo-img {
  height: 44px;
  width: auto;
  object-fit: contain;
  border-radius: var(--radius-sm);
  transition: transform var(--transition-fast);
}

.logo:hover .logo-img {
  transform: scale(1.06);
}

.logo span {
  color: var(--color-brand-teal);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
}

.nav-link {
  font-size: 0.925rem;
  font-weight: 600;
  color: var(--color-text-main);
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-full);
  position: relative;
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-brand-navy);
  background-color: rgba(86, 185, 176, 0.08);
}

.nav-link.active {
  color: var(--color-brand-navy);
  background-color: rgba(86, 185, 176, 0.12);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 3px;
  background-color: var(--color-brand-teal);
  border-radius: var(--radius-full);
}

/* --------------------------------------------------------------------------
   PAGE HERO BANNER (PREMIUM INSTITUTIONAL STYLE)
   -------------------------------------------------------------------------- */
.page-hero {
  background: linear-gradient(135deg, #1D3B73 0%, #12264C 100%);
  color: #FFFFFF;
  padding: 3rem 0;
  position: relative;
  overflow: hidden;
  border-bottom: 4px solid var(--color-brand-teal);
  box-shadow: inset 0 -10px 20px rgba(0, 0, 0, 0.15);
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -5%;
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, rgba(86, 185, 176, 0.18) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.page-hero .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 0.75rem;
  font-weight: 500;
}

.page-hero .breadcrumb a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
}

.page-hero .breadcrumb a:hover {
  color: var(--color-brand-teal);
}

.page-hero .breadcrumb-sep {
  color: rgba(255, 255, 255, 0.4);
}

.page-hero h1 {
  color: #FFFFFF !important;
  font-size: 2.35rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  letter-spacing: -0.015em;
  line-height: 1.25;
}

.page-hero p {
  color: rgba(255, 255, 255, 0.88) !important;
  font-size: 1.05rem;
  max-width: 780px;
  line-height: 1.6;
  margin-bottom: 0;
}

.nav-tabs {
  background-color: var(--color-surface-offwhite);
  border-bottom: 1px solid var(--color-border);
  padding: 0.65rem 0;
}

.nav-tabs-inner {
  display: flex;
  gap: 0.75rem;
  overflow-x: auto;
}

.nav-tab-item {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  background-color: transparent;
}

.nav-tab-item:hover, .nav-tab-item.active {
  background-color: var(--color-surface-white);
  color: var(--color-brand-navy);
  box-shadow: var(--shadow-subtle);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.6rem;
  color: var(--color-brand-navy);
  cursor: pointer;
}

@media (max-width: 992px) {
  .mobile-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--color-surface-white);
    flex-direction: column;
    padding: 1.5rem;
    box-shadow: var(--shadow-hover);
    border-bottom: 1px solid var(--color-border);
  }
  .nav-links.is-open { display: flex; }
}

/* --------------------------------------------------------------------------
   6. HERO SECTION & BRAND ACCENTS
   -------------------------------------------------------------------------- */
.hero {
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-2xl);
  background: linear-gradient(135deg, #FFFDFB 0%, #EBF7F6 60%, #FFFFFF 100%);
  border-bottom: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

.hero-eyebrow {
  color: var(--color-brand-teal-dark);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
  display: block;
}

.hero-title {
  font-size: 3.25rem;
  font-weight: 700;
  color: var(--color-brand-navy);
  line-height: 1.25;
  margin-bottom: 1.25rem;
}

.hero-title em {
  font-style: italic;
  color: var(--color-brand-orange);
}

.hero-lead {
  font-size: 1.2rem;
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: 2.25rem;
}

.hero-actions {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  align-items: center;
}

.book-card-3d {
  position: relative;
  width: 100%;
  max-width: 390px;
  margin: 0 auto;
  background: var(--color-surface-white);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  box-shadow: var(--shadow-hover);
  border: 1px solid var(--color-border);
  text-align: center;
  transition: transform var(--transition-normal);
}

.book-card-3d:hover {
  transform: translateY(-6px);
}

.book-card-badge {
  position: absolute;
  top: -16px;
  right: 24px;
  background: var(--color-brand-orange);
  color: var(--color-surface-white);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-orange-glow);
}

/* --------------------------------------------------------------------------
   7. INTERACTIVE 6-STAGE LEARNING CYCLE (Logo Teal Nodes)
   -------------------------------------------------------------------------- */
.cycle-section {
  text-align: center;
}

.cycle-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1.25rem;
  margin-top: 2.5rem;
}

.cycle-node {
  background-color: var(--color-surface-white);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-subtle);
}

.cycle-node:hover, .cycle-node.active {
  border-color: var(--color-brand-teal);
  background: var(--color-brand-teal-light);
  transform: translateY(-6px);
  box-shadow: var(--shadow-teal-glow);
}

.cycle-node-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background-color: var(--color-brand-navy);
  color: var(--color-surface-white);
  font-weight: 700;
  border-radius: 50%;
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
}

.cycle-node-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-brand-navy);
}

.cycle-details-box {
  margin-top: 2.5rem;
  background-color: var(--color-surface-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  text-align: left;
  box-shadow: var(--shadow-card);
}

@media (max-width: 992px) {
  .cycle-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 576px) {
  .cycle-grid { grid-template-columns: repeat(2, 1fr); }
}

/* --------------------------------------------------------------------------
   8. PRICING MATRIX & CARDS
   -------------------------------------------------------------------------- */
.pricing-card {
  background-color: var(--color-surface-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-card);
}

.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.pricing-card--featured {
  border: 2px solid var(--color-brand-orange);
  box-shadow: var(--shadow-hover);
}

.pricing-ribbon {
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-brand-orange);
  color: var(--color-surface-white);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.35rem 1.25rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  box-shadow: var(--shadow-orange-glow);
}

.pricing-title {
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
}

.pricing-price {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-brand-navy);
  margin-bottom: 1.5rem;
}

.pricing-price span {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  font-weight: 400;
}

.pricing-features {
  list-style: none;
  margin-left: 0;
  margin-bottom: 2.25rem;
  flex-grow: 1;
}

.pricing-features li {
  position: relative;
  padding-left: 1.85rem;
  margin-bottom: 0.85rem;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
}

.pricing-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-brand-green-dark);
  font-weight: 700;
  font-size: 1.1rem;
}

/* --------------------------------------------------------------------------
   9. READER & DOCUMENTATION LAYOUT (3-COLUMNS)
   -------------------------------------------------------------------------- */
.reader-layout {
  display: grid;
  grid-template-columns: 270px 1fr 250px;
  gap: var(--space-xl);
  align-items: start;
}

.reader-sidebar-left {
  position: sticky;
  top: 100px;
  background-color: var(--color-surface-offwhite);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}

.reader-menu {
  list-style: none;
}

.reader-menu-title {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: 0.85rem;
}

.reader-menu-link {
  display: block;
  padding: 0.5rem 0.75rem;
  font-size: 0.925rem;
  color: var(--color-text-main);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.reader-menu-link:hover, .reader-menu-link.active {
  background-color: var(--color-brand-teal-light);
  color: var(--color-brand-teal-dark);
  font-weight: 600;
}

.reader-content {
  background-color: var(--color-surface-white);
  min-width: 0;
}

.reader-sidebar-right {
  position: sticky;
  top: 100px;
}

.callout-box {
  background-color: var(--color-brand-teal-light);
  border-left: 4px solid var(--color-brand-teal);
  padding: 1.5rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 1.75rem 0;
}

.callout-box h4 {
  color: var(--color-brand-teal-dark);
  margin-bottom: 0.5rem;
}

.example-box {
  background-color: var(--color-surface-offwhite);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin: 1.75rem 0;
}

.example-box-title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-brand-navy);
  margin-bottom: 0.5rem;
}

@media (max-width: 1024px) {
  .reader-layout { grid-template-columns: 1fr; }
  .reader-sidebar-left, .reader-sidebar-right { position: static; max-height: none; }
}

/* --------------------------------------------------------------------------
   10. FOOTER & FLOATING WHATSAPP BUTTON
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--color-brand-navy);
  color: var(--color-surface-white);
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-lg);
}

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

.footer-title {
  color: var(--color-surface-white);
  font-size: 1.1rem;
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.6rem;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.925rem;
}

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

.sub-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 1.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.5);
}

.whatsapp-float {
  position: fixed;
  bottom: 28px;
  right: 28px;
  background-color: var(--color-whatsapp);
  color: var(--color-surface-white);
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 30px var(--color-whatsapp-shadow);
  z-index: 999;
  transition: all var(--transition-fast);
}

.whatsapp-float:hover {
  transform: scale(1.12);
  color: var(--color-surface-white);
}

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr; }
  .sub-footer { flex-direction: column; gap: 1rem; text-align: center; }
}