/* ===== ПЕРЕМЕННЫЕ ЦВЕТОВ И ШРИФТОВ ===== */
:root {
  --primary-gradient-start: #667eea;
  --primary-gradient-end: #764ba2;
  --secondary-gradient-start: #f093fb;
  --secondary-gradient-end: #f5576c;
  --accent-color: #4f46e5;
  --accent-hover: #3730a3;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --text-light: #ffffff;
  --bg-white: #ffffff;
  --bg-gray-50: #f9fafb;
  --bg-gray-100: #f3f4f6;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
  --blur-sm: blur(8px);
  --blur-md: blur(12px);
  
  /* ===== ПЕРЕМЕННЫЕ ДЛЯ ЛОГОТИПА ===== */
  --logo-size-mobile: 280px;
  --logo-size-tablet: 340px;
  --logo-size-desktop: 400px;
  --logo-border-radius: 50%;
  --logo-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  --logo-overlay-opacity-min: 0.25;
  --logo-overlay-opacity-max: 0.5;
  
  /* ===== АНИМАЦИИ ===== */
  --animation-float-duration: 6s;
  --animation-breathing-duration: 4s;
  --animation-bounce-duration: 1.2s;
  --animation-bounce-delay: 200ms;
  --animation-background-shift: 15s;
}

/* ===== СБРОС И БАЗОВЫЕ СТИЛИ ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background: linear-gradient(135deg, var(--primary-gradient-start) 0%, var(--primary-gradient-end) 100%);
  background-attachment: fixed;
  overflow-x: hidden;
}

/* ===== АНИМАЦИИ ===== */
@keyframes bounceIn {
  0% {
    transform: scale(0.8);
    opacity: 0;
  }
  60% {
    transform: scale(1.1);
    opacity: 1;
  }
  100% {
    transform: scale(1);
  }
}

@keyframes breathing {
  0% {
    opacity: var(--logo-overlay-opacity-min);
  }
  10% {
    opacity: var(--logo-overlay-opacity-max);
  }
}
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-20px);
  }
}

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

@keyframes backgroundShift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

/* ===== УТИЛИТЫ ===== */
.animate-fade-in-up {
  animation: fadeInUp 0.8s ease-out forwards;
}

.animate-fade-in-left {
  animation: fadeInLeft 0.8s ease-out forwards;
}

.animate-fade-in-right {
  animation: fadeInRight 0.8s ease-out forwards;
}

.animate-float {
  animation: float 6s ease-in-out infinite;
}

.animate-pulse {
  animation: pulse 2s ease-in-out infinite;
}

.glass {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: var(--blur-md);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.glass-dark {
  background: rgba(0, 0, 0, 0.1);
  backdrop-filter: var(--blur-md);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* ===== ТИПОГРАФИКА ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

p {
  margin-bottom: 1rem;
  font-size: clamp(1rem, 2vw, 1.125rem);
}

/* ===== HEADER ===== */
header {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, 
    var(--primary-gradient-start) 0%, 
    var(--primary-gradient-end) 50%,
    var(--secondary-gradient-start) 100%);
  background-size: 400% 400%;
  animation: backgroundShift 15s ease infinite;
  overflow: hidden;
}

header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  padding: 2rem;
  color: var(--text-light);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.logo-bouncer {
  animation: bounceIn var(--animation-bounce-duration) cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
  animation-delay: var(--animation-bounce-delay);
  opacity: 0; /* начальное состояние */
}

.logo-container {
  position: relative;
  width: var(--logo-size-mobile);
  height: var(--logo-size-mobile);
  margin-bottom: 2rem;
  border-radius: var(--logo-border-radius);
  box-shadow: var(--logo-shadow);
  -webkit-mask-image: radial-gradient(circle, white 70%, transparent 100%);
  mask-image: radial-gradient(circle, white 70%, transparent 100%);
}

.logo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--logo-border-radius);
  mix-blend-mode: screen; /* или 'overlay' */
}

.logo-container::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: var(--logo-border-radius);
  background: linear-gradient(135deg, var(--primary-gradient-start), var(--primary-gradient-end));
  animation: breathing var(--animation-breathing-duration) ease-in-out infinite;
  pointer-events: none;
  mix-blend-mode: overlay;
  opacity: var(--logo-overlay-opacity-min);
}

.hero-title {
  margin-bottom: 1rem;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2.5vw, 1.25rem);
  opacity: 0.9;
  margin-bottom: 2.5rem;
  font-weight: 400;
}

/* ===== КНОПКИ ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  border-radius: 50px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
  font-size: 1rem;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: rgba(255, 255, 255, 0.15);
  color: var(--text-light);
  backdrop-filter: var(--blur-sm);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-primary:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: var(--bg-white);
  color: var(--accent-color);
  box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
  background: var(--bg-gray-50);
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

/* ===== ОСНОВНОЙ КОНТЕНТ ===== */
main {
  position: relative;
  background: var(--bg-white);
}

section {
  padding: 5rem 0;
  position: relative;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ===== СЕКЦИЯ ВОЗМОЖНОСТЕЙ ===== */
.features {
  background: linear-gradient(180deg, var(--bg-white) 0%, var(--bg-gray-50) 100%);
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
  color: var(--text-primary);
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.125rem;
  margin-bottom: 4rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.feature-card {
  background: var(--bg-white);
  padding: 2.5rem 2rem;
  border-radius: 20px;
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
  border: 1px solid rgba(0, 0, 0, 0.05);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-color), var(--secondary-gradient-end));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.feature-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1.5rem;
  background: linear-gradient(135deg, var(--accent-color), var(--secondary-gradient-end));
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--text-light);
  position: relative;
  overflow: hidden;
}

.feature-icon::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transform: rotate(45deg);
  animation: shimmer 3s ease infinite;
}

@keyframes shimmer {
  0% {
    transform: translateX(-100%) translateY(-100%) rotate(45deg);
  }
  100% {
    transform: translateX(100%) translateY(100%) rotate(45deg);
  }
}

.feature-title {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.feature-description {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 0;
}

/* ===== СЕКЦИЯ "КАК ЭТО РАБОТАЕТ" ===== */
.how-it-works {
  background: var(--bg-white);
  position: relative;
}

.how-it-works::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="%23f3f4f6" opacity="0.5"/><circle cx="75" cy="75" r="1" fill="%23f3f4f6" opacity="0.3"/><circle cx="50" cy="10" r="0.5" fill="%23e5e7eb" opacity="0.4"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grain)"/></svg>') repeat;
  opacity: 0.6;
  pointer-events: none;
}

.steps {
  position: relative;
  z-index: 1;
}

.steps-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 3rem;
  margin-top: 3rem;
  position: relative;
}

.step {
  text-align: center;
  position: relative;
}

.step-number {
  width: 60px;
  height: 60px;
  margin: 0 auto 1.5rem;
  background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-light);
  position: relative;
  z-index: 2;
  box-shadow: var(--shadow-lg);
}

.step-title {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.step-description {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 0;
}

/* Соединительные линии для десктопа */
@media (min-width: 768px) {
  .steps-container::before {
    content: '';
    position: absolute;
    top: 30px;
    left: 50px;
    right: 50px;
    height: 2px;
    background: linear-gradient(90deg, 
      var(--accent-color) 0%, 
      var(--secondary-gradient-end) 50%, 
      var(--accent-color) 100%);
    z-index: 1;
  }
}

/* ===== СЕКЦИЯ ПРЕИМУЩЕСТВ ===== */
.benefits {
  background: linear-gradient(180deg, var(--bg-gray-50) 0%, var(--bg-white) 100%);
  position: relative;
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.benefit-card {
  background: var(--bg-white);
  padding: 2rem;
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.benefit-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, var(--accent-color), var(--secondary-gradient-end));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.benefit-card:hover::before {
  opacity: 0.05;
}

.benefit-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.benefit-icon {
  width: 50px;
  height: 50px;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--accent-color), var(--secondary-gradient-end));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--text-light);
  position: relative;
  z-index: 1;
}

.benefit-title {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  position: relative;
  z-index: 1;
}

.benefit-description {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 0;
  position: relative;
  z-index: 1;
}

/* ===== FOOTER ===== */
footer {
  background: linear-gradient(135deg, var(--text-primary) 0%, #1f2937 100%);
  color: var(--text-light);
  padding: 3rem 0 2rem;
  position: relative;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

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

.footer-title {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-light);
}

.footer-description {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 2rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.footer-cta {
  margin-bottom: 2rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.footer-link {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-link:hover {
  color: var(--text-light);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.5rem;
  margin-top: 2rem;
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.875rem;
}

/* ===== СКРОЛЛ-ИНДИКАТОР ===== */
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 40px;
  border: 2px solid rgba(255, 255, 255, 0.8);
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.scroll-indicator:hover {
  border-color: var(--text-light);
}

.scroll-indicator::after {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  width: 4px;
  height: 6px;
  background: rgba(255, 255, 255, 0.8);
  border-radius: 2px;
  transform: translateX(-50%);
  animation: scrollBounce 2s ease infinite;
}

@keyframes scrollBounce {
  0%, 100% {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
  50% {
    opacity: 0.3;
    transform: translateX(-50%) translateY(12px);
  }
}

/* ===== АДАПТИВНОСТЬ ===== */

/* Планшеты */
@media (min-width: 768px) {
  .logo-container {
    width: var(--logo-size-tablet);
    height: var(--logo-size-tablet);
  }
}

/* Десктопы */
@media (min-width: 1024px) {
  .logo-container {
    width: var(--logo-size-desktop);
    height: var(--logo-size-desktop);
  }
}
@media (max-width: 768px) {
  section {
    padding: 3rem 0;
  }
  
  .hero-content {
    padding: 1rem;
  }
  
  .features-grid,
  .benefits-grid {
    grid-template-columns: 1fr;
  }
  
  .steps-container {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .footer-links {
    flex-direction: column;
    gap: 1rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }
  
  .feature-card,
  .benefit-card {
    padding: 1.5rem;
  }
}

/* ===== ПЕЧАТЬ ===== */
@media print {
  * {
    background: transparent !important;
    color: black !important;
    box-shadow: none !important;
  }
  
  .animate-float,
  .animate-pulse {
    animation: none !important;
  }
}