/* ============================================
   SHAHIDWORKS.IN — GLOBAL DESIGN SYSTEM
   ============================================ */

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

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Primary Colors */
  --clr-dark: #0F172A;
  --clr-dark-800: #1E293B;
  --clr-dark-700: #334155;
  --clr-dark-600: #475569;
  --clr-dark-500: #64748B;

  /* Light Colors */
  --clr-light: #F8FAFC;
  --clr-light-200: #E2E8F0;
  --clr-light-300: #CBD5E1;
  --clr-white: #FFFFFF;

  /* Accent */
  --clr-accent: #22C55E;
  --clr-accent-light: #4ADE80;
  --clr-accent-dark: #16A34A;
  --clr-accent-glow: rgba(34, 197, 94, 0.25);
  --clr-accent-subtle: rgba(34, 197, 94, 0.08);

  /* Semantic */
  --clr-error: #EF4444;
  --clr-warning: #F59E0B;
  --clr-success: #22C55E;
  --clr-info: #3B82F6;

  /* Gradients */
  --gradient-hero: linear-gradient(135deg, #0F172A 0%, #1E293B 50%, #0F172A 100%);
  --gradient-accent: linear-gradient(135deg, #22C55E 0%, #16A34A 100%);
  --gradient-card: linear-gradient(145deg, rgba(30, 41, 59, 0.8) 0%, rgba(15, 23, 42, 0.95) 100%);
  --gradient-glass: linear-gradient(135deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0.02) 100%);
  --gradient-cta: linear-gradient(135deg, #0F172A 0%, #16A34A 50%, #0F172A 100%);

  /* Typography */
  --ff-heading: 'Poppins', sans-serif;
  --ff-body: 'Inter', sans-serif;

  --fs-h1: clamp(2.2rem, 5vw, 3.5rem);
  --fs-h2: clamp(1.6rem, 3.5vw, 2.5rem);
  --fs-h3: clamp(1.2rem, 2.5vw, 1.75rem);
  --fs-h4: clamp(1.05rem, 2vw, 1.35rem);
  --fs-body: 1rem;
  --fs-body-lg: 1.125rem;
  --fs-small: 0.875rem;
  --fs-xs: 0.75rem;

  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --fw-extrabold: 800;

  --lh-heading: 1.2;
  --lh-body: 1.7;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Layout */
  --container-max: 1200px;
  --container-narrow: 900px;
  --container-wide: 1400px;
  --section-padding: clamp(3rem, 8vw, 6rem) 0;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
  --shadow-md: 0 4px 14px rgba(0,0,0,0.15);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.2);
  --shadow-xl: 0 20px 50px rgba(0,0,0,0.3);
  --shadow-glow: 0 0 30px var(--clr-accent-glow);
  --shadow-card: 0 4px 20px rgba(0,0,0,0.25);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  --transition-bounce: 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);

  /* Z-Index Scale */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-whatsapp: 500;
  --z-header: 600;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--ff-body);
  font-size: var(--fs-body);
  font-weight: var(--fw-regular);
  line-height: var(--lh-body);
  color: var(--clr-light);
  background-color: var(--clr-dark);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

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

ul, ol {
  list-style: none;
}

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

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--ff-heading);
  font-weight: var(--fw-bold);
  line-height: var(--lh-heading);
  color: var(--clr-white);
}

h1 { font-size: var(--fs-h1); font-weight: var(--fw-extrabold); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
h4 { font-size: var(--fs-h4); }

p {
  margin-bottom: var(--space-md);
  color: var(--clr-light-300);
}

strong { font-weight: var(--fw-semibold); color: var(--clr-white); }
em { font-style: italic; }

/* ---------- Selection ---------- */
::selection {
  background: var(--clr-accent);
  color: var(--clr-dark);
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--clr-dark);
}
::-webkit-scrollbar-thumb {
  background: var(--clr-dark-700);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--clr-accent);
}

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

.container--narrow {
  max-width: var(--container-narrow);
}

.container--wide {
  max-width: var(--container-wide);
}

.section {
  padding: var(--section-padding);
}

.section--alt {
  background: var(--clr-dark-800);
}

/* ---------- Flex / Grid Utilities ---------- */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }
.gap-2xl { gap: var(--space-2xl); }

.grid { display: grid; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- Text Utilities ---------- */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-accent { color: var(--clr-accent); }
.text-muted { color: var(--clr-dark-500); }
.text-white { color: var(--clr-white); }
.text-small { font-size: var(--fs-small); }
.text-xs { font-size: var(--fs-xs); }
.text-lg { font-size: var(--fs-body-lg); }

/* ---------- Spacing Utilities ---------- */
.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); }
.mt-2xl { margin-top: var(--space-2xl); }
.mt-3xl { margin-top: var(--space-3xl); }
.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); }

/* ---------- Visibility ---------- */
.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;
}

/* ---------- Animation Keyframes ---------- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

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

@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-40px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

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

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

@keyframes countUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Scroll Animation Classes ---------- */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.animate-on-scroll.slide-left {
  transform: translateX(-40px);
}
.animate-on-scroll.slide-left.is-visible {
  transform: translateX(0);
}

.animate-on-scroll.slide-right {
  transform: translateX(40px);
}
.animate-on-scroll.slide-right.is-visible {
  transform: translateX(0);
}

.animate-on-scroll.scale-in {
  transform: scale(0.9);
}
.animate-on-scroll.scale-in.is-visible {
  transform: scale(1);
}

/* Stagger children */
.stagger-children > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.stagger-children.is-visible > *:nth-child(1) { transition-delay: 0.1s; }
.stagger-children.is-visible > *:nth-child(2) { transition-delay: 0.2s; }
.stagger-children.is-visible > *:nth-child(3) { transition-delay: 0.3s; }
.stagger-children.is-visible > *:nth-child(4) { transition-delay: 0.4s; }
.stagger-children.is-visible > *:nth-child(5) { transition-delay: 0.5s; }
.stagger-children.is-visible > *:nth-child(6) { transition-delay: 0.6s; }

.stagger-children.is-visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Section Header Pattern ---------- */
.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-header .section-badge {
  display: inline-block;
  background: var(--clr-accent-subtle);
  color: var(--clr-accent);
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  padding: var(--space-xs) var(--space-lg);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-md);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  border: 1px solid rgba(34, 197, 94, 0.2);
}

.section-header h2 {
  margin-bottom: var(--space-md);
}

.section-header p {
  max-width: 600px;
  margin: 0 auto;
  font-size: var(--fs-body-lg);
}

/* ---------- Accent Line ---------- */
.accent-line {
  width: 60px;
  height: 4px;
  background: var(--gradient-accent);
  border-radius: var(--radius-full);
  margin: var(--space-md) auto;
}

.accent-line--left {
  margin-left: 0;
}