/* ============================================
   VANILLA CSS - Converted from TailwindCSS
   Full design system with all necessary styles
   ============================================ */

/* ===== CSS VARIABLES (Design Tokens) ===== */
:root {
  /* Colors */
  --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;
  --color-blue-50: #eff6ff;
  --color-blue-600: #2563eb;
  --color-purple-50: #faf5ff;
  --color-purple-600: #9333ea;
  --color-green-100: #dcfce7;
  --color-green-600: #16a34a;
  --color-red-50: #fef2f2;
  --color-red-100: #fee2e2;
  --color-red-600: #dc2626;
  --color-yellow-600: #ca8a04;
  
  /* Spacing */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.25rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  --spacing-20: 5rem;
  
  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  
  /* Line Heights */
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-relaxed: 1.625;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.625rem;
  --radius-xl: 1.025rem;
  --radius-2xl: 1rem;
  --radius-3xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  
  /* Transitions */
  --transition-colors: color 150ms ease, background-color 150ms ease, border-color 150ms ease;
  --transition-shadow: box-shadow 150ms ease;
  --transition-all: all 150ms ease;
}

/* ===== RESET & BASE ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--color-white);
  color: var(--color-gray-900);
  min-height: 100vh;
}

/* ===== TYPOGRAPHY ===== */
h1 {
  font-size: var(--text-5xl);
  font-weight: 700;
  line-height: var(--leading-tight);
}

h2 {
  font-size: var(--text-4xl);
  font-weight: 700;
  line-height: var(--leading-tight);
}

h3 {
  font-size: var(--text-2xl);
  font-weight: 600;
  line-height: var(--leading-snug);
}

p {
  line-height: var(--leading-relaxed);
}

a {
  color: inherit;
  text-decoration: none;
}

/* ===== UTILITY CLASSES ===== */
.container {
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-4);
  padding-right: var(--spacing-4);
}

@media (min-width: 768px) {
  h1 { font-size: var(--text-6xl); }
  .container { max-width: 768px; }
}

@media (min-width: 1024px) {
  .container { max-width: 1024px; }
}

@media (min-width: 1280px) {
  .container { max-width: 1280px; }
}

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

.sr-only:focus {
  position: static;
  width: auto;
  height: auto;
  padding: 0.5rem 1rem;
  margin: 0;
  overflow: visible;
  clip: auto;
  white-space: normal;
  background-color: var(--color-blue-600);
  color: white;
  border-radius: var(--radius-md);
  z-index: 50;
}

/* ===== COMPONENTS ===== */

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-gray-100);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--spacing-4);
  padding-bottom: var(--spacing-4);
}

.logo {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-gray-900);
  display: block;
}

.lang-switcher {
  display: flex;
  background-color: var(--color-gray-100);
  border-radius: var(--radius-lg);
  padding: var(--spacing-1);
  gap: 0;
}

.lang-btn {
  padding: var(--spacing-1) var(--spacing-3);
  font-size: var(--text-sm);
  border-radius: var(--radius-md);
  border: none;
  background: transparent;
  color: var(--color-gray-600);
  cursor: pointer;
  transition: var(--transition-all);
}

.lang-btn:hover {
  color: var(--color-gray-900);
}

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

/* Sections */
section {
  padding-top: var(--spacing-20);
  padding-bottom: var(--spacing-20);
  padding-left: var(--spacing-4);
  padding-right: var(--spacing-4);
}

.section-gradient-blue {
  background: linear-gradient(to bottom right, var(--color-gray-50), var(--color-blue-50));
}

.section-gradient-purple {
  background: linear-gradient(to bottom right, var(--color-blue-50), var(--color-purple-50));
}

.section-gradient-purple-soft {
  background: linear-gradient(to bottom right, rgba(239, 246, 255, 0.5), rgba(250, 245, 255, 0.5));
}

.section-bg-gray {
  background-color: var(--color-gray-50);
}

.section-bg-red {
  background-color: var(--color-red-50);
}

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

.section-bg-gradient-cta {
  background: linear-gradient(to bottom right, var(--color-blue-600), var(--color-purple-600));
  color: white;
}

/* Grid Layouts */
.grid {
  display: grid;
  gap: var(--spacing-8);
}

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

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

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

@media (max-width: 767px) {
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Flex */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

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

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-2 { gap: var(--spacing-2); }
.gap-3 { gap: var(--spacing-3); }
.gap-4 { gap: var(--spacing-4); }
.gap-6 { gap: var(--spacing-6); }
.gap-8 { gap: var(--spacing-8); }
.gap-12 { gap: var(--spacing-12); }

/* Spacing */
.space-y-3 > * + * { margin-top: var(--spacing-3); }
.space-y-4 > * + * { margin-top: var(--spacing-4); }
.space-y-8 > * + * { margin-top: var(--spacing-8); }

.mb-2 { margin-bottom: var(--spacing-2); }
.mb-3 { margin-bottom: var(--spacing-3); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }
.mb-12 { margin-bottom: var(--spacing-12); }
.mb-16 { margin-bottom: var(--spacing-16); }

.mt-3 { margin-top: var(--spacing-3); }
.mt-4 { margin-top: var(--spacing-4); }

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

.p-4 { padding: var(--spacing-4); }
.p-6 { padding: var(--spacing-6); }
.p-8 { padding: var(--spacing-8); }

.px-3 { padding-left: var(--spacing-3); padding-right: var(--spacing-3); }
.px-4 { padding-left: var(--spacing-4); padding-right: var(--spacing-4); }
.px-6 { padding-left: var(--spacing-6); padding-right: var(--spacing-6); }
.px-8 { padding-left: var(--spacing-8); padding-right: var(--spacing-8); }

.py-1 { padding-top: var(--spacing-1); padding-bottom: var(--spacing-1); }
.py-3 { padding-top: var(--spacing-3); padding-bottom: var(--spacing-3); }
.py-4 { padding-top: var(--spacing-4); padding-bottom: var(--spacing-4); }

/* Text */
.text-center { text-align: center; }
.text-xs { font-size: var(--text-xs); }
.text-sm { font-size: var(--text-sm); }
.text-xl { font-size: var(--text-xl); }
.text-2xl { font-size: var(--text-2xl); }
.text-3xl { font-size: var(--text-3xl); }
.text-4xl { font-size: var(--text-4xl); }
.text-5xl { font-size: var(--text-5xl); }

.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.uppercase { text-transform: uppercase; }
.tracking-wide { letter-spacing: 0.025em; }

.text-white { color: white; }
.text-gray-300 { color: var(--color-gray-300); }
.text-gray-400 { color: var(--color-gray-400); }
.text-gray-500 { color: var(--color-gray-500); }
.text-gray-600 { color: var(--color-gray-600); }
.text-gray-700 { color: var(--color-gray-700); }
.text-gray-900 { color: var(--color-gray-900); }
.text-blue-600 { color: var(--color-blue-600); }
.text-green-600 { color: var(--color-green-600); }
.text-purple-600 { color: var(--color-purple-600); }
.text-red-600 { color: var(--color-red-600); }
.text-yellow-600 { color: var(--color-yellow-600); }

/* Backgrounds */
.bg-white { background-color: var(--color-white); }
.bg-gray-50 { background-color: var(--color-gray-50); }
.bg-gray-100 { background-color: var(--color-gray-100); }
.bg-gray-200 { background-color: var(--color-gray-200); }
.bg-gray-900 { background-color: var(--color-gray-900); }
.bg-gray-800 { background-color: var(--color-gray-800); }
.bg-blue-600 { background-color: var(--color-blue-600); }
.bg-green-100 { background-color: var(--color-green-100); }
.bg-red-50 { background-color: var(--color-red-50); }

/* Borders */
.border { border: 1px solid var(--color-gray-200); }
.border-2 { border: 2px solid var(--color-gray-200); }
.border-gray-100 { border-color: var(--color-gray-100); }
.border-gray-200 { border-color: var(--color-gray-200); }
.border-red-100 { border-color: var(--color-red-100); }

.rounded { border-radius: var(--radius-sm); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }
.rounded-3xl { border-radius: var(--radius-3xl); }
.rounded-full { border-radius: var(--radius-full); }

/* Sizing */
.w-4 { width: var(--spacing-4); }
.w-5 { width: var(--spacing-5); }
.w-6 { width: var(--spacing-6); }
.w-8 { width: var(--spacing-8); }
.w-full { width: 100%; }
.w-auto { width: auto; }

.h-4 { height: var(--spacing-4); }
.h-5 { height: var(--spacing-5); }
.h-6 { height: var(--spacing-6); }
.h-8 { height: var(--spacing-8); }
.h-9 { height: var(--spacing-12); }
.h-auto { height: auto; }

.max-w-3xl { max-width: 48rem; }
.max-w-4xl { max-width: 56rem; }
.max-w-6xl { max-width: 72rem; }

.min-w-max { min-width: max-content; }

/* Shadows */
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }
.shadow-2xl { box-shadow: var(--shadow-2xl); }

/* Transitions */
.transition-colors { transition: var(--transition-colors); }
.transition-shadow { transition: var(--transition-shadow); }
.transition-all { transition: var(--transition-all); }

/* Overflow */
.overflow-hidden { overflow: hidden; }

/* Positioning */
.relative { position: relative; }
.absolute { position: absolute; }
.flex-shrink-0 { flex-shrink: 0; }

.opacity-20 { opacity: 0.2; }

/* WhiteSpace */
.whitespace-nowrap { white-space: nowrap; }

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--spacing-4) var(--spacing-8);
  border-radius: var(--radius-xl);
  font-size: var(--text-base);
  border: none;
  cursor: pointer;
  transition: var(--transition-colors);
  text-align: center;
}

.btn-primary {
  background-color: var(--color-blue-600);
  color: white;
}

.btn-primary:hover {
  background-color: #1d4ed8;
}

.btn-secondary {
  background-color: white;
  color: var(--color-gray-900);
  border: 2px solid var(--color-gray-200);
}

.btn-secondary:hover {
  background-color: var(--color-gray-50);
}

.btn-dark {
  background-color: var(--color-gray-900);
  color: white;
}

.btn-dark:hover {
  background-color: var(--color-gray-800);
}

/* Tab Buttons */
.tab-btn {
  padding: var(--spacing-3) var(--spacing-6);
  border-radius: var(--radius-xl);
  border: none;
  cursor: pointer;
  transition: var(--transition-all);
  background-color: white;
  color: var(--color-gray-700);
  font-size: var(--text-base);
}

.tab-btn:hover {
  background-color: var(--color-gray-100);
}

.tab-btn.active {
  background-color: var(--color-blue-600);
  color: white;
  box-shadow: var(--shadow-lg);
}

/* Cards */
.card {
  background-color: white;
  border-radius: var(--radius-2xl);
  padding: var(--spacing-8);
  border: 1px solid var(--color-gray-200);
  transition: var(--transition-shadow);
}

.card:hover {
  box-shadow: var(--shadow-xl);
}

.card-pricing {
  background-color: white;
  border-radius: var(--radius-3xl);
  padding: var(--spacing-8);
  box-shadow: var(--shadow-2xl);
  border: 1px solid var(--color-gray-100);
}

@media (min-width: 768px) {
  .card-pricing {
    padding: var(--spacing-12);
  }
}

/* Icon Sizes */
.icon {
  width: var(--spacing-5);
  height: var(--spacing-5);
  display: inline-block;
  flex-shrink: 0;
}

/* Hero Stats */
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-6);
  color: var(--color-gray-600);
  padding-top: var(--spacing-8);
}

.hero-stat {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

/* Pain Points */
.pain-point {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
  padding: var(--spacing-4);
  background-color: white;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-red-100);
}

/* Testimonial Card */
.testimonial-card {
  background-color: white;
  border-radius: var(--radius-2xl);
  padding: var(--spacing-8);
  border: 1px solid var(--color-gray-200);
  transition: var(--transition-shadow);
}

.testimonial-card:hover {
  box-shadow: var(--shadow-lg);
}

/* Footer */
footer {
  padding: var(--spacing-8) var(--spacing-4);
  background-color: var(--color-gray-900);
  color: var(--color-gray-300);
}

footer .container {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-4);
}

@media (min-width: 768px) {
  footer .container {
    flex-direction: row;
  }
}

footer a:hover {
  color: white;
  transition: var(--transition-colors);
}

/* SVG Icons */
svg {
  display: inline-block;
  vertical-align: middle;
}

/* Marquee Animation */
@keyframes marquee {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

.marquee-container {
  position: relative;
  overflow: hidden;
}

.marquee {
  display: flex;
  gap: var(--spacing-12);
  animation: marquee 30s linear infinite;
}

.marquee-item {
  display: flex;
  gap: var(--spacing-12);
  align-items: center;
  min-width: max-content;
}

.tech-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  color: var(--color-gray-400);
  transition: var(--transition-colors);
}

.tech-logo:hover {
  color: var(--color-gray-600);
}

.tech-logo-icon {
  width: var(--spacing-8);
  height: var(--spacing-8);
  background-color: var(--color-gray-200);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: var(--text-xs);
}

/* How It Works Steps */
.step-card {
  position: relative;
  padding: var(--spacing-6);
  background: linear-gradient(to bottom right, var(--color-gray-50), white);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-gray-200);
  transition: var(--transition-shadow);
}

.step-card:hover {
  box-shadow: var(--shadow-lg);
}

.step-number {
  font-size: var(--text-5xl);
  color: var(--color-blue-600);
  opacity: 0.2;
  margin-bottom: var(--spacing-4);
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in {
  animation: fadeIn 0.6s ease-out;
}

/* Smooth scrollbar */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
  background: #888;
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: #555;
}