/* ==========================================================================
   SHAH DIGITAL MARKETING ACADEMY - DESIGN SYSTEM & PERFORMANCE STYLES
   Optimized for 60-120 FPS Ultra-Smooth Scrolling
   ========================================================================== */

:root {
  --color-primary: #E31E24;
  --color-primary-dark: #b81419;
  --color-primary-glow: rgba(227, 30, 36, 0.25);
  --color-secondary: #111111;
  --color-surface: #141414;
  --color-surface-elevated: #1a1a1a;
  --color-surface-card: rgba(24, 24, 27, 0.75);
  --color-border: rgba(255, 255, 255, 0.1);
  --color-border-hover: rgba(227, 30, 36, 0.4);
  --color-text: #FFFFFF;
  --color-text-muted: #D1D5DB;
  --color-accent-gold: #F6B100;
  --color-accent-emerald: #10B981;
  
  --font-heading: 'Montserrat', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  --transition-smooth: all 0.25s ease-out;
}

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

html {
  font-family: var(--font-body);
  background-color: var(--color-secondary);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body {
  background-color: #111111;
  color: #F5F5F5;
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

::selection {
  background: var(--color-primary);
  color: #FFFFFF;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 800;
  color: #FFFFFF;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

p {
  color: #D1D5DB;
  font-size: 0.95rem;
  line-height: 1.7;
}

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

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

/* Layout Utilities */
.container {
  width: 100%;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

@media (min-width: 640px) {
  .container {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}

/* High-Performance Glassmorphism (Hardware Accelerated) */
.glass-header {
  background: rgba(17, 17, 17, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  transform: translateZ(0);
}

.glass-card {
  background: rgba(24, 24, 27, 0.75);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
  transform: translateZ(0);
}

.glass-card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-4px) translateZ(0);
  box-shadow: 0 15px 30px -10px rgba(227, 30, 36, 0.15);
}

.text-gradient {
  background: linear-gradient(135deg, #FFFFFF 20%, #E31E24 80%, #F6B100 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.bg-radial-glow {
  background: radial-gradient(circle at 50% 25%, rgba(227, 30, 36, 0.15) 0%, rgba(17, 17, 17, 0) 65%);
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  background-color: var(--color-primary);
  color: #FFFFFF;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.825rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  box-shadow: 0 10px 20px -5px var(--color-primary-glow);
  transition: var(--transition-smooth);
  transform: translateZ(0);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  box-shadow: 0 12px 25px -5px rgba(227, 30, 36, 0.45);
  transform: translateY(-2px) translateZ(0);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  background: rgba(255, 255, 255, 0.08);
  color: #FFFFFF;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.825rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.15);
  cursor: pointer;
  transition: var(--transition-smooth);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

.btn-whatsapp {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: #25D366;
  color: #FFFFFF;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.85rem;
  transition: var(--transition-smooth);
}

.btn-whatsapp:hover {
  background: #20ba5a;
  transform: scale(1.03);
}

.whatsapp-float {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 56px;
  height: 56px;
  background: #25D366;
  color: #FFFFFF;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 25px rgba(37, 211, 102, 0.4);
  z-index: 99;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  transform: translateZ(0);
}

.whatsapp-float:hover {
  transform: scale(1.1) translateZ(0);
  box-shadow: 0 15px 30px rgba(37, 211, 102, 0.5);
}

/* Optimized Cursor Glow - GPU Transform & Throttled */
#cursor-glow {
  position: fixed;
  pointer-events: none;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(227, 30, 36, 0.12) 0%, rgba(227, 30, 36, 0) 70%);
  z-index: 9999;
  top: 0;
  left: 0;
  transform: translate3d(-9999px, -9999px, 0);
  will-change: transform;
}

@media (max-width: 1024px) {
  #cursor-glow {
    display: none !important;
  }
}

/* Range Slider */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  box-shadow: 0 0 15px var(--color-primary);
  transition: transform 0.1s;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

/* Form Styles */
.form-input, .form-select {
  width: 100%;
  padding: 0.875rem 1.125rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  color: #FFFFFF;
  font-family: var(--font-body);
  font-size: 0.9rem;
  transition: var(--transition-smooth);
}

.form-input:focus, .form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 0 0 3px rgba(227, 30, 36, 0.2);
}

.form-select option {
  background-color: #1a1a1a;
  color: #FFFFFF;
}

/* Accordion FAQs */
details {
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  background: rgba(24, 24, 27, 0.6);
  padding: 1.25rem 1.5rem;
  transition: border-color 0.2s ease, background 0.2s ease;
}

details[open] {
  border-color: rgba(227, 30, 36, 0.4);
  background: rgba(24, 24, 27, 0.85);
}

summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.05rem;
  color: #FFFFFF;
  cursor: pointer;
  list-style: none;
}

summary::-webkit-details-marker {
  display: none;
}

summary svg {
  transition: transform 0.25s ease;
}

details[open] summary svg {
  transform: rotate(180deg);
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: rgba(227, 30, 36, 0.15);
  color: var(--color-primary);
  border: 1px solid rgba(227, 30, 36, 0.3);
}

.timeline-card {
  position: relative;
  padding-left: 2rem;
  border-left: 2px solid rgba(227, 30, 36, 0.4);
}

.timeline-card::before {
  content: '';
  position: absolute;
  left: -7px;
  top: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 10px var(--color-primary);
}