@import url('https://fonts.googleapis.com/css2?family=Inter:wght@100;200;300;400;500;600;700;800;900&display=swap');

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Тёмная палитра жидкого стекла */
  --bg-primary: #000000;
  --bg-secondary: #050505;
  --glass-dark: rgba(255, 255, 255, 0.02);
  --glass-medium: rgba(255, 255, 255, 0.04);
  --glass-light: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-hover: rgba(255, 255, 255, 0.1);

  /* Акцентные цвета */
  --accent-primary: #4A7C7E;
  --accent-secondary: #6B46C1;
  --accent-glow: #00D9FF;
  --accent-purple: #8B5CF6;
  --accent-pink: #EC4899;

  /* Текст */
  --text-primary: rgba(255, 255, 255, 0.92);
  --text-secondary: rgba(255, 255, 255, 0.6);
  --text-dim: rgba(255, 255, 255, 0.3);
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* Liquid Glass Background */
.liquid-bg {
  position: fixed;
  inset: 0;
  z-index: 1;
  overflow: hidden;
}

.liquid-gradient {
  position: absolute;
  width: 150%;
  height: 150%;
  top: -25%;
  left: -25%;
  background:
    radial-gradient(circle at 20% 50%, rgba(74, 124, 126, 0.15) 0%, transparent 40%),
    radial-gradient(circle at 80% 20%, rgba(107, 70, 193, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 40% 80%, rgba(236, 72, 153, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 60% 40%, rgba(0, 217, 255, 0.05) 0%, transparent 60%);
  filter: blur(60px);
  animation: liquidFlow 20s ease-in-out infinite;
}

@keyframes liquidFlow {
  0%, 100% { transform: rotate(0deg) scale(1) translate(0, 0); }
  33% { transform: rotate(120deg) scale(1.1) translate(-10%, 10%); }
  66% { transform: rotate(240deg) scale(0.95) translate(10%, -10%); }
}

/* Glass Orbs */
.glass-orb {
  position: fixed;
  border-radius: 50%;
  background:
    radial-gradient(circle at 30% 30%,
      rgba(255, 255, 255, 0.08) 0%,
      rgba(255, 255, 255, 0.02) 40%,
      transparent 70%);
  backdrop-filter: blur(20px) saturate(150%);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
  border: 1px solid rgba(255, 255, 255, 0.05);
  z-index: 2;
}

.glass-orb::before {
  content: "";
  position: absolute;
  inset: 20%;
  border-radius: 50%;
  background: radial-gradient(circle at 70% 70%, transparent, rgba(255, 255, 255, 0.05));
  filter: blur(15px);
}

.orb1 {
  width: 350px;
  height: 350px;
  top: 10%;
  left: -5%;
  animation: floatOrb1 25s infinite ease-in-out;
}

.orb2 {
  width: 450px;
  height: 450px;
  bottom: -10%;
  right: -5%;
  animation: floatOrb2 30s infinite ease-in-out;
}

.orb3 {
  width: 280px;
  height: 280px;
  top: 50%;
  left: 60%;
  animation: floatOrb3 20s infinite ease-in-out;
}

@keyframes floatOrb1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(100px, -50px) scale(1.1); }
}

@keyframes floatOrb2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-80px, -100px) scale(0.9); }
}

@keyframes floatOrb3 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-50px, 80px) scale(1.15); }
}

/* Noise Texture */
.noise-overlay {
  position: fixed;
  inset: 0;
  opacity: 0.02;
  z-index: 3;
  pointer-events: none;
  mix-blend-mode: overlay;
  background-image:
    repeating-linear-gradient(45deg, transparent, transparent 2px, rgba(255,255,255,.03) 2px, rgba(255,255,255,.03) 4px),
    repeating-linear-gradient(-45deg, transparent, transparent 2px, rgba(255,255,255,.02) 2px, rgba(255,255,255,.02) 4px);
}

/* Main Container */
.main-container {
  position: relative;
  z-index: 10;
  min-height: 100vh;
  padding: 60px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  animation: fadeIn 1.5s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Logo Section */
.logo-container {
  margin-bottom: 80px;
  padding: 60px 100px;
  background: linear-gradient(135deg, var(--glass-light) 0%, var(--glass-dark) 100%);
  backdrop-filter: blur(40px) saturate(120%);
  -webkit-backdrop-filter: blur(40px) saturate(120%);
  border-radius: 30px;
  border: 1px solid var(--glass-border);
  position: relative;
  overflow: hidden;
  box-shadow:
    0 20px 40px rgba(0, 0, 0, 0.8),
    inset 0 0 60px rgba(74, 124, 126, 0.05);
}

.logo-container::before {
  content: "";
  position: absolute;
  top: -100%;
  left: -100%;
  width: 300%;
  height: 300%;
  background: conic-gradient(
    from 0deg,
    transparent,
    rgba(74, 124, 126, 0.1),
    transparent,
    rgba(107, 70, 193, 0.1),
    transparent
  );
  animation: shimmer 15s linear infinite;
  opacity: 0.5;
}

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

.logo {
  font-size: 5rem;
  font-weight: 100;
  letter-spacing: -4px;
  color: var(--text-primary);
  text-align: center;
  position: relative;
  z-index: 2;
  background: linear-gradient(90deg,
    var(--text-primary) 0%,
    rgba(255, 255, 255, 0.5) 50%,
    var(--text-primary) 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  animation: textGlow 3s ease-in-out infinite;
}

@keyframes textGlow {
  0%, 100% { background-position: 200% center; }
  50% { background-position: 0% center; }
}

.tagline {
  font-size: 0.9rem;
  font-weight: 300;
  color: var(--text-secondary);
  text-align: center;
  letter-spacing: 5px;
  text-transform: uppercase;
  margin-top: 15px;
}

/* Cards Grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 25px;
  width: 100%;
  max-width: 1200px;
  margin-bottom: 80px;
}

.card {
  height: 260px;
  background: linear-gradient(
    135deg,
    var(--glass-light) 0%,
    var(--glass-medium) 50%,
    var(--glass-dark) 100%
  );
  backdrop-filter: blur(30px) saturate(120%);
  -webkit-backdrop-filter: blur(30px) saturate(120%);
  border-radius: 24px;
  padding: 40px;
  border: 1px solid var(--glass-border);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    var(--glass-hover) 0%,
    transparent 50%
  );
  opacity: 0;
  transition: opacity 0.3s;
}

.card::after {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: 24px;
  padding: 2px;
  background: linear-gradient(
    45deg,
    var(--accent-glow),
    transparent,
    var(--accent-purple),
    transparent,
    var(--accent-pink)
  );
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.4s;
}

.card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow:
    0 30px 60px rgba(0, 0, 0, 0.6),
    0 0 40px rgba(74, 124, 126, 0.1);
}

.card:hover::before {
  opacity: 1;
}

.card:hover::after {
  opacity: 0.3;
  animation: borderGlow 4s linear infinite;
}

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

.card-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  margin-bottom: 25px;
  background: linear-gradient(135deg, var(--glass-hover), var(--glass-light));
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  box-shadow:
    0 10px 30px rgba(0, 0, 0, 0.4),
    inset 0 0 20px rgba(255, 255, 255, 0.02);
}

.card h2 {
  color: var(--text-primary);
  font-size: 1.5rem;
  font-weight: 300;
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}

.card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 300;
  line-height: 1.6;
}

/* Form Section */
.form-section {
  width: 100%;
  max-width: 900px;
  margin: 60px auto;
  padding: 60px;
  background: linear-gradient(
    135deg,
    var(--glass-light) 0%,
    var(--glass-medium) 30%,
    var(--glass-dark) 100%
  );
  backdrop-filter: blur(40px) saturate(120%);
  -webkit-backdrop-filter: blur(40px) saturate(120%);
  border-radius: 32px;
  border: 1px solid var(--glass-border);
  position: relative;
  overflow: hidden;
  box-shadow:
    0 30px 60px rgba(0, 0, 0, 0.8),
    inset 0 0 60px rgba(74, 124, 126, 0.03);
}

.form-section::before {
  content: "";
  position: absolute;
  top: -150px;
  right: -150px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--accent-secondary), transparent);
  filter: blur(100px);
  opacity: 0.2;
}

.form-title {
  font-size: 2.8rem;
  font-weight: 200;
  color: var(--text-primary);
  text-align: center;
  margin-bottom: 50px;
  letter-spacing: -1px;
}

.form-group {
  margin-bottom: 30px;
  position: relative;
}

.form-label {
  display: block;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 12px;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.form-input,
.form-select,
.form-textarea,
.form-file {
  width: 100%;
  padding: 18px 24px;
  background: var(--glass-dark);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  font-size: 1rem;
  color: var(--text-primary);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.form-select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  cursor: pointer;
  background-image:
    linear-gradient(135deg, var(--accent-glow), var(--accent-purple)),
    linear-gradient(transparent, transparent);
  background-size: 2px 12px, 100%;
  background-position: calc(100% - 24px) center, 0 0;
  background-repeat: no-repeat;
  padding-right: 60px;
  position: relative;
}

.form-select::after {
  content: '▼';
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent-glow);
  pointer-events: none;
  font-size: 0.8rem;
}

.form-select option {
  background: #0a0a0a;
  color: var(--text-primary);
  padding: 12px;
}

.form-select:hover {
  border-color: var(--accent-primary);
  background-color: var(--glass-medium);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  background: var(--glass-medium);
  border-color: var(--accent-glow);
  box-shadow:
    0 0 0 3px rgba(0, 217, 255, 0.1),
    0 10px 30px rgba(0, 217, 255, 0.05);
  transform: translateY(-2px);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-dim);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

.form-file {
  cursor: pointer;
  position: relative;
  padding: 50px 24px;
  text-align: center;
  border: 2px dashed var(--glass-border);
  background: var(--glass-dark);
}

.form-file:hover {
  border-color: var(--accent-primary);
  background: var(--glass-medium);
}

.form-file:focus {
  outline: none;
  background: var(--glass-medium);
  border-color: var(--accent-glow);
  box-shadow:
    0 0 0 3px rgba(0, 217, 255, 0.1),
    0 10px 30px rgba(0, 217, 255, 0.05);
}

.form-file::file-selector-button {
  padding: 12px 24px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s;
  margin-bottom: 10px;
}

.form-file::file-selector-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(74, 124, 126, 0.3);
}

.file-info {
  margin-top: 8px;
  font-size: 0.8rem;
  color: var(--text-dim);
  font-weight: 300;
  letter-spacing: 0.5px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.submit-btn {
  width: 100%;
  padding: 20px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: white;
  border: none;
  border-radius: 20px;
  font-size: 1.1rem;
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-top: 40px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.submit-btn::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.2), transparent);
  transform: translate(-50%, -50%) scale(0);
  transition: transform 0.6s;
}

.submit-btn:hover {
  transform: translateY(-3px);
  box-shadow:
    0 20px 40px rgba(74, 124, 126, 0.3),
    0 0 60px rgba(0, 217, 255, 0.1);
}

.submit-btn:hover::before {
  transform: translate(-50%, -50%) scale(2);
}

.submit-btn:active {
  transform: scale(0.98);
}

.success-message {
  margin-top: 30px;
  padding: 20px;
  background: linear-gradient(135deg,
    rgba(50, 215, 75, 0.1),
    rgba(50, 215, 75, 0.05));
  border: 1px solid rgba(50, 215, 75, 0.3);
  border-radius: 16px;
  color: rgba(50, 215, 75, 0.9);
  text-align: center;
  font-weight: 500;
  opacity: 0;
  transform: translateY(-10px);
  transition: all 0.3s;
  pointer-events: none;
}

.success-message.show {
  opacity: 1;
  transform: translateY(0);
}

/* Section Pages */
.section-page {
  display: none;
  min-height: 100vh;
  padding: 60px 20px;
  position: relative;
  z-index: 10;
  animation: sectionReveal 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes sectionReveal {
  from {
    opacity: 0;
    transform: translateY(40px);
    filter: blur(5px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
  }
}

.section-page.active {
  display: block;
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 32px;
  background: var(--glass-medium);
  backdrop-filter: blur(30px);
  border: 1px solid var(--glass-border);
  border-radius: 50px;
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  margin-bottom: 50px;
}

.back-btn:hover {
  background: var(--glass-hover);
  transform: translateX(-5px);
  box-shadow: 0 10px 30px rgba(74, 124, 126, 0.2);
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header h2 {
  font-size: 4rem;
  font-weight: 100;
  color: var(--text-primary);
  letter-spacing: -3px;
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: "";
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 2px;
  background: linear-gradient(90deg,
    transparent,
    var(--accent-glow),
    transparent
  );
}

.section-content {
  max-width: 1000px;
  margin: 0 auto;
  background: linear-gradient(135deg,
    var(--glass-light) 0%,
    var(--glass-medium) 50%,
    var(--glass-dark) 100%
  );
  backdrop-filter: blur(40px) saturate(120%);
  border-radius: 32px;
  padding: 60px;
  border: 1px solid var(--glass-border);
  box-shadow:
    0 30px 60px rgba(0, 0, 0, 0.8),
    inset 0 0 60px rgba(74, 124, 126, 0.03);
}

.section-content h3 {
  font-size: 2rem;
  font-weight: 300;
  color: var(--text-primary);
  margin-bottom: 30px;
  letter-spacing: -0.5px;
}

.section-content p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 25px;
  font-weight: 300;
}

.section-content ul {
  list-style: none;
  padding: 0;
}

.section-content li {
  padding: 20px 0 20px 40px;
  color: var(--text-secondary);
  position: relative;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  font-weight: 300;
  border-bottom: 1px solid var(--glass-dark);
}

.section-content li:last-child {
  border-bottom: none;
}

.section-content li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 10px;
  height: 10px;
  background: linear-gradient(135deg, var(--accent-glow), var(--accent-primary));
  border-radius: 50%;
  box-shadow: 0 0 20px rgba(0, 217, 255, 0.5);
}

.section-content li:hover {
  transform: translateX(10px);
  color: var(--text-primary);
  padding-left: 50px;
}

/* Review Cards */
.review-card {
  background: linear-gradient(135deg,
    var(--glass-medium),
    var(--glass-dark)
  );
  backdrop-filter: blur(20px);
  border-radius: 20px;
  padding: 35px;
  margin-bottom: 30px;
  border: 1px solid var(--glass-border);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

.review-card::before {
  content: "";
  position: absolute;
  top: -100%;
  left: -100%;
  width: 300%;
  height: 300%;
  background: radial-gradient(circle, var(--accent-pink), transparent);
  opacity: 0;
  transition: opacity 0.4s;
  filter: blur(60px);
}

.review-card:hover {
  transform: translateX(10px) translateY(-5px);
  box-shadow: 0 20px 40px rgba(236, 72, 153, 0.1);
}

.review-card:hover::before {
  opacity: 0.1;
}

.review-author {
  font-weight: 400;
  color: var(--text-primary);
  margin-bottom: 20px;
  font-size: 1.3rem;
  letter-spacing: -0.5px;
}

.review-text {
  color: var(--text-secondary);
  line-height: 1.8;
  font-weight: 300;
  font-style: italic;
}

.rating {
  color: var(--accent-glow);
  margin-top: 20px;
  font-size: 1.2rem;
  text-shadow: 0 0 20px rgba(0, 217, 255, 0.5);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 12px;
}

::-webkit-scrollbar-track {
  background: var(--glass-dark);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(var(--accent-primary), var(--accent-secondary));
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(var(--accent-secondary), var(--accent-glow));
}

/* Mobile */
@media (max-width: 768px) {
  .logo {
    font-size: 3.5rem;
  }
  .logo-container {
    padding: 40px 30px;
  }
  .cards-grid {
    grid-template-columns: 1fr;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .form-section {
    padding: 40px 30px;
  }
  .section-content {
    padding: 40px 30px;
  }
}