/* ============================================
   ELITE AC EXPERTS - MODERN DESIGN SYSTEM
   Compact, Professional, Mobile-First
   ============================================ */

/* ==================== IMPORTS ==================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Manrope:wght@600;700;800&display=swap');

/* ==================== CSS RESET ==================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ==================== CSS VARIABLES ==================== */
:root {
  /* Brand Colors */
  --primary-yellow: #FDB714;
  --primary-black: #1A1A1A;
  --secondary-yellow: #FFCF33;
  --dark-gray: #2B2B2B;
  --light-gray: #F7F8FA;
  --white: #FFFFFF;

  /* Accent Colors */
  --accent-orange: #FF8C42;
  --success-green: #10B981;
  --error-red: #EF4444;

  /* Typography - Modern, Compact Sizing */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Manrope', 'Inter', sans-serif;

  /* Font Sizes - Refined, Not Oversized */
  --fs-xs: 0.75rem;
  /* 12px */
  --fs-sm: 0.875rem;
  /* 14px */
  --fs-base: 0.9375rem;
  /* 15px */
  --fs-lg: 1rem;
  /* 16px */
  --fs-xl: 1.125rem;
  /* 18px */
  --fs-2xl: 1.25rem;
  /* 20px */
  --fs-3xl: 1.5rem;
  /* 24px */
  --fs-4xl: 1.875rem;
  /* 30px */
  --fs-5xl: 2.25rem;
  /* 36px */
  --fs-6xl: 2.75rem;
  /* 44px */

  /* Font Weights */
  --fw-normal: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;

  /* Line Heights */
  --lh-tight: 1.25;
  --lh-base: 1.5;
  --lh-relaxed: 1.75;

  /* Spacing - Compact, Not Excessive */
  --space-xs: 0.375rem;
  /* 6px */
  --space-sm: 0.5rem;
  /* 8px */
  --space-md: 0.75rem;
  /* 12px */
  --space-lg: 1rem;
  /* 16px */
  --space-xl: 1.5rem;
  /* 24px */
  --space-2xl: 2rem;
  /* 32px */
  --space-3xl: 3rem;
  /* 48px */
  --space-4xl: 4rem;
  /* 64px */

  /* Border Radius - Modern */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Shadows - Subtle */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.04);
  --shadow-md: 0 2px 8px -1px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 4px 16px -2px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 8px 24px -4px rgba(0, 0, 0, 0.12);
  --shadow-yellow: 0 4px 20px rgba(253, 183, 20, 0.25);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Container */
  --container-max: 1140px;
  --container-padding: 1.25rem;
}

/* ==================== BASE STYLES ==================== */
html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  font-weight: var(--fw-normal);
  line-height: var(--lh-base);
  color: var(--primary-black);
  background-color: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ==================== TYPOGRAPHY ==================== */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  color: var(--primary-black);
  margin-bottom: var(--space-lg);
  letter-spacing: -0.02em;
}

h1 {
  font-size: var(--fs-5xl);
  font-weight: 800;
}

h2 {
  font-size: var(--fs-4xl);
  font-weight: var(--fw-bold);
}

h3 {
  font-size: var(--fs-3xl);
  font-weight: var(--fw-bold);
}

h4 {
  font-size: var(--fs-2xl);
  font-weight: var(--fw-semibold);
}

h5 {
  font-size: var(--fs-xl);
  font-weight: var(--fw-semibold);
}

h6 {
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
}

p {
  margin-bottom: var(--space-lg);
  color: #4B5563;
  line-height: var(--lh-relaxed);
}

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

a:hover {
  color: var(--secondary-yellow);
}

.highlight {
  color: var(--primary-yellow);
}

/* ==================== UTILITY CLASSES ==================== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  width: 100%;
}

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

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

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

.mb-sm {
  margin-bottom: var(--space-sm);
}

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

.mb-lg {
  margin-bottom: var(--space-lg);
}

.mb-xl {
  margin-bottom: var(--space-xl);
}

.mb-2xl {
  margin-bottom: var(--space-2xl);
}

.mt-sm {
  margin-top: var(--space-sm);
}

.mt-md {
  margin-top: var(--space-md);
}

.mt-lg {
  margin-top: var(--space-lg);
}

.mt-xl {
  margin-top: var(--space-xl);
}

/* ==================== BUTTONS ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.5rem;
  font-family: var(--font-heading);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  text-align: center;
  text-decoration: none;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  gap: 0.5rem;
}

.btn-primary {
  background-color: var(--primary-yellow);
  color: var(--primary-black);
  box-shadow: var(--shadow-yellow);
}

.btn-primary:hover {
  background-color: #E5A612;
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(253, 183, 20, 0.35);
}

.btn-secondary {
  background-color: transparent;
  color: var(--white);
  border: 1.5px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
}

.btn-outline {
  background-color: transparent;
  color: var(--primary-yellow);
  border: 1.5px solid var(--primary-yellow);
}

.btn-outline:hover {
  background-color: var(--primary-yellow);
  color: var(--primary-black);
}

.btn-lg {
  padding: 0.875rem 2rem;
  font-size: var(--fs-base);
}

/* ==================== SECTIONS ==================== */
.section {
  padding: var(--space-4xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.section-title {
  font-size: var(--fs-4xl);
  margin-bottom: var(--space-md);
  font-weight: var(--fw-bold);
}

.section-subtitle {
  font-size: var(--fs-base);
  color: #6B7280;
  line-height: var(--lh-relaxed);
  max-width: 600px;
  margin: 0 auto;
}

/* ==================== GRID SYSTEM ==================== */
.grid {
  display: grid;
  gap: var(--space-xl);
}

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

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

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

/* ==================== CARDS ==================== */
.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  height: 100%;
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(253, 183, 20, 0.2);
}

.card-title {
  font-size: var(--fs-xl);
  margin-bottom: var(--space-md);
  color: var(--primary-black);
  font-weight: var(--fw-semibold);
}

.card-text {
  color: #6B7280;
  font-size: var(--fs-sm);
  line-height: var(--lh-relaxed);
  margin-bottom: 0;
}

/* Background Variants */
.bg-light {
  background-color: var(--light-gray);
}

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

/* ==================== RESPONSIVE DESIGN ==================== */
@media (max-width: 1024px) {
  :root {
    --fs-6xl: 2.25rem;
    --fs-5xl: 1.875rem;
    --fs-4xl: 1.5rem;
    --space-4xl: 3rem;
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --fs-6xl: 1.875rem;
    --fs-5xl: 1.5rem;
    --fs-4xl: 1.375rem;
    --fs-3xl: 1.25rem;
    --container-padding: 1rem;
    --space-4xl: 2.5rem;
    --space-3xl: 2rem;
  }

  .section {
    padding: var(--space-3xl) 0;
  }

  .section-header {
    margin-bottom: var(--space-2xl);
  }

  .grid,
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .btn {
    padding: 0.625rem 1.25rem;
    font-size: var(--fs-sm);
  }

  .btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: var(--fs-base);
  }

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

@media (max-width: 480px) {
  :root {
    --fs-6xl: 1.625rem;
    --fs-5xl: 1.375rem;
    --container-padding: 0.875rem;
  }

  .btn,
  .btn-lg {
    width: 100%;
    padding: 0.75rem 1rem;
  }
}

/* ==================== WHATSAPP BUTTON ==================== */
.whatsapp-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  background-color: #25D366;
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  box-shadow: 0 4px 16px rgba(37, 211, 102, 0.4);
  z-index: 1000;
  transition: all var(--transition-base);
}

.whatsapp-float:hover {
  background-color: #128C7E;
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.5);
}

/* ==================== SCROLL TO TOP ==================== */
.scroll-top {
  position: fixed;
  bottom: 88px;
  right: 24px;
  width: 44px;
  height: 44px;
  background-color: var(--primary-yellow);
  color: var(--primary-black);
  border: none;
  border-radius: 50%;
  font-size: 1.25rem;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
}

.scroll-top:hover {
  background-color: var(--secondary-yellow);
  transform: translateY(-2px);
}

@media (max-width: 768px) {
  .whatsapp-float {
    width: 52px;
    height: 52px;
    bottom: 20px;
    right: 20px;
    font-size: 26px;
  }

  .scroll-top {
    width: 40px;
    height: 40px;
    bottom: 80px;
    right: 20px;
    font-size: 1.125rem;
  }
}