/**
 * НейроИмпульс Brand System v2.0
 * neuroimpuls.ru — единые стили по дизайн-системе
 */

/* ========== CSS Variables ========== */
:root {
  --brand-primary: #5278A2;
  --color-dark-100: #171717;
  --color-dark-80: rgba(23, 23, 23, 0.8);
  --color-dark-50: rgba(23, 23, 23, 0.5);
  --color-dark-30: rgba(23, 23, 23, 0.3);
  --color-dark-20: rgba(23, 23, 23, 0.2);
  --color-white-100: #FFFFFF;
  --color-white-90: rgba(255, 255, 255, 0.9);
  --color-light-100: #F0F0F0;
  --color-light-200: #DDDDDD;
  --color-accent-light-1: #F1F7FD;
  --color-accent-light-2: #D7EAFF;
  --color-accent-light-3: #BDD6F2;
  --color-rating-star: #FFD700;

  --gradient-text: linear-gradient(90deg, rgba(77, 106, 138, 1) 0%, rgba(97, 122, 150, 1) 45%, rgba(77, 106, 138, 1) 100%);
  --gradient-progress: linear-gradient(90deg, rgba(77, 106, 138, 1) 0%, rgba(97, 122, 150, 1) 100%);
  --gradient-silver: linear-gradient(90deg, rgba(255, 255, 255, 1) 0%, rgba(203, 203, 203, 1) 47%, rgba(255, 255, 255, 1) 100%);

  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 40px;
  --spacing-2xl: 56px;
  --spacing-3xl: 80px;

  --transition-base: all 0.3s ease;
  --transition-slow: all 0.4s ease;
  --transition-fast: all 0.2s ease;

  --shadow-card-hover: 0 12px 24px rgba(0, 0, 0, 0.15);
  --shadow-premium: 4px 4px 14px 0 rgba(0, 0, 0, 0.25);
  --shadow-button: 0 6px 12px rgba(82, 120, 162, 0.3);
}

/* ========== Base ========== */
body {
  font-family: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--color-light-100);
  color: var(--color-dark-100);
  margin: 0;
  line-height: 1.35;
}

/* ========== Header (brand) ========== */
.business-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background: var(--color-white-100);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.business-nav {
  display: flex;
  gap: 8px;
  align-items: center;
}

.business-nav a {
  color: var(--color-dark-100);
  text-decoration: none;
  font-size: 16px;
  font-weight: 500;
  padding: 10px 20px;
  border-radius: 20px;
  transition: var(--transition-base);
}

.business-nav a:hover {
  background: var(--color-accent-light-1);
  color: var(--brand-primary);
}

.business-nav a.active {
  background: var(--brand-primary);
  color: var(--color-white-100);
}

.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
  color: var(--color-dark-100);
  font-size: 24px;
}

@media (max-width: 767px) {
  .business-header {
    padding: 12px 16px;
  }

  .mobile-nav-toggle {
    display: block;
  }

  .business-nav {
    display: none;
  }

  .business-nav.is-open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-white-100);
    padding: 16px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
  }
}

.design-selector {
  display: none;
}

main {
  padding-top: 60px;
}

@media (max-width: 767px) {
  main {
    padding-top: 56px;
  }
}

/* ========== Layout ========== */
.container-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  position: relative;
  z-index: 1;
}

.section {
  padding: var(--spacing-3xl) 0;
  position: relative;
}

.section-tight {
  padding: var(--spacing-xl) 0;
}

.section-spacious {
  padding: 120px 0;
}

/* ========== Typography ========== */
.display-xl {
  font-size: clamp(120px, 12vw, 240px);
  font-weight: 400;
  line-height: 1em;
  letter-spacing: -0.02em;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.h1 {
  font-size: clamp(48px, 5vw, 90px);
  font-weight: 800;
  line-height: 1em;
  text-transform: lowercase;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 0 0 var(--spacing-md);
}

.h2 {
  font-size: clamp(36px, 4vw, 60px);
  font-weight: 700;
  line-height: 1.25em;
  color: var(--color-dark-80);
  margin: 0 0 var(--spacing-md);
}

.h3 {
  font-size: clamp(20px, 2vw, 27px);
  font-weight: 700;
  line-height: 1.25em;
  color: var(--brand-primary);
  margin: 0 0 var(--spacing-sm);
}

.paragraph {
  font-size: clamp(16px, 1.5vw, 20px);
  font-weight: 300;
  line-height: 1.35em;
  color: var(--color-dark-100);
  margin: 0 0 var(--spacing-sm);
}

.paragraph-bold {
  font-size: clamp(16px, 1.5vw, 20px);
  font-weight: 500;
  line-height: 1.35em;
  color: var(--color-white-90);
}

.block-number {
  font-size: clamp(32px, 4vw, 55px);
  font-weight: 300;
  line-height: 1em;
  color: var(--color-dark-30);
  margin-bottom: var(--spacing-md);
}

.block-label {
  font-size: 19px;
  font-weight: 300;
  line-height: 1em;
  color: var(--color-dark-50);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
}

/* ========== Hero ========== */
.hero-section {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: center;
  padding: var(--spacing-3xl) 0;
  background: var(--color-light-100);
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.hero-title {
  font-family: 'Manrope', sans-serif;
  font-size: clamp(72px, 10vw, 160px);
  font-weight: 400;
  line-height: 0.95em;
  letter-spacing: -0.02em;
  margin: 0 0 var(--spacing-md);
}

.hero-title .gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(24px, 2.5vw, 36px);
  font-weight: 700;
  line-height: 1.25em;
  color: var(--color-dark-80);
  margin: 0 0 var(--spacing-sm);
}

.hero-description {
  font-size: clamp(16px, 1.5vw, 20px);
  font-weight: 300;
  line-height: 1.35em;
  color: var(--color-dark-100);
  margin: 0 0 var(--spacing-lg);
  max-width: 640px;
}

/* ========== Cards ========== */
.card-base {
  background: var(--color-white-100);
  border-radius: 20px;
  padding: 30px;
  box-shadow: none;
  transition: var(--transition-base);
}

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

.card-accent {
  background: var(--brand-primary);
  border-radius: 20px;
  padding: 30px;
  color: var(--color-white-90);
  transition: var(--transition-base);
}

.card-accent .h3 {
  color: var(--color-white-90);
}

.card-with-icon {
  background: var(--color-white-100);
  border-radius: 20px;
  padding: 30px;
  position: relative;
  transition: var(--transition-base);
}

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

.card-premium {
  background: var(--color-white-100);
  border-radius: 20px;
  padding: 30px;
  border: 2px solid transparent;
  background-image: linear-gradient(white, white), var(--gradient-silver);
  background-origin: border-box;
  background-clip: padding-box, border-box;
  box-shadow: var(--shadow-premium);
}

.icon-marker {
  width: 60px;
  height: 60px;
  border-radius: 12px;
  background: rgba(82, 120, 162, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.icon-marker img {
  width: 36px;
  height: 36px;
  object-fit: contain;
}

/* ========== Testimonial ========== */
.testimonial-card {
  background: var(--color-white-100);
  border-radius: 20px;
  padding: 40px;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  transition: var(--transition-base);
}

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

.testimonial-header {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.testimonial-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
}

.testimonial-author {
  flex: 1;
  min-width: 0;
}

.testimonial-name {
  font-size: clamp(20px, 2vw, 27px);
  font-weight: 700;
  color: var(--color-dark-80);
  margin: 0 0 4px;
}

.testimonial-role {
  font-size: 19px;
  font-weight: 300;
  color: var(--color-dark-50);
  margin: 0;
}

.testimonial-rating {
  display: flex;
  gap: 4px;
}

.testimonial-star {
  color: var(--color-rating-star);
  font-size: 24px;
}

.testimonial-star.empty {
  color: var(--color-dark-20);
}

.testimonial-text {
  font-size: clamp(16px, 1.5vw, 20px);
  font-weight: 300;
  line-height: 1.35em;
  color: var(--color-dark-100);
  margin: 0;
}

.testimonial-result {
  font-size: clamp(20px, 2vw, 26px);
  font-weight: 700;
  line-height: 1.25em;
  color: var(--brand-primary);
  margin: 0;
}

/* ========== Pricing ========== */
.pricing-card {
  background: var(--color-white-100);
  border-radius: 20px;
  padding: 40px;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  min-height: 420px;
  transition: var(--transition-base);
}

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

.pricing-card.featured {
  background: var(--brand-primary);
  color: var(--color-white-90);
  transform: scale(1.02);
}

.pricing-card.featured:hover {
  transform: scale(1.02) translateY(-4px);
}

.pricing-header {
  text-align: center;
}

.pricing-name {
  font-size: clamp(32px, 4vw, 60px);
  font-weight: 700;
  line-height: 1.25em;
  color: var(--color-dark-80);
  margin: 0 0 var(--spacing-md);
}

.pricing-card.featured .pricing-name {
  color: var(--color-white-90);
}

.pricing-price-wrapper {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.pricing-price {
  font-size: clamp(28px, 3vw, 35px);
  font-weight: 800;
  color: var(--brand-primary);
}

.pricing-card.featured .pricing-price {
  color: var(--color-white-100);
}

.pricing-price-old {
  font-size: 24px;
  font-weight: 600;
  color: var(--color-dark-30);
  text-decoration: line-through;
}

.pricing-features {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  flex: 1;
}

.pricing-feature {
  position: relative;
  padding-left: 32px;
  font-size: clamp(16px, 1.5vw, 20px);
  font-weight: 300;
  line-height: 1.35em;
  color: var(--color-dark-100);
}

.pricing-card.featured .pricing-feature {
  color: var(--color-white-90);
}

.pricing-feature::before {
  content: '';
  position: absolute;
  left: 0;
  top: 12px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brand-primary);
}

.pricing-card.featured .pricing-feature::before {
  background: var(--color-white-90);
}

.pricing-cta {
  margin-top: auto;
}

/* ========== Buttons ========== */
.button-primary,
.button-secondary,
.button-with-icon {
  font-family: 'Manrope', sans-serif;
  font-size: clamp(16px, 1.5vw, 20px);
  font-weight: 700;
  padding: 18px 40px;
  border-radius: 20px;
  cursor: pointer;
  transition: var(--transition-base);
  display: inline-block;
  text-decoration: none;
  border: none;
  min-height: 44px;
  box-sizing: border-box;
}

.button-primary {
  background: var(--brand-primary);
  color: var(--color-white-100);
}

.button-primary:hover {
  background: rgba(82, 120, 162, 0.9);
  transform: translateY(-2px);
  box-shadow: var(--shadow-button);
}

.button-primary:active {
  transform: translateY(0);
}

.button-secondary {
  background: var(--color-white-100);
  color: var(--brand-primary);
  border: 2px solid var(--brand-primary);
}

.button-secondary:hover {
  background: rgba(82, 120, 162, 0.1);
  transform: translateY(-2px);
}

.button-with-icon {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: var(--brand-primary);
  color: var(--color-white-100);
}

.button-with-icon:hover {
  background: rgba(82, 120, 162, 0.9);
  transform: translateY(-2px);
  box-shadow: var(--shadow-button);
}

.button-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.button-with-icon:hover .button-icon {
  transform: translateX(4px);
}

.pill-button {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: var(--color-white-90);
  color: var(--color-dark-80);
  font-family: 'Manrope', sans-serif;
  font-size: 19px;
  font-weight: 300;
  padding: 12px 24px;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  transition: var(--transition-base);
}

.pill-button:hover {
  background: var(--color-white-100);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* ========== Metrics ========== */
.metric-block {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.metric-value {
  font-size: clamp(80px, 12vw, 200px);
  font-weight: 800;
  line-height: 0.9em;
  letter-spacing: -0.02em;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 0;
}

.metric-prefix {
  font-size: clamp(32px, 4vw, 55px);
  font-weight: 300;
  line-height: 1em;
  color: var(--color-dark-50);
  margin-bottom: -16px;
}

.metric-suffix {
  font-size: clamp(48px, 6vw, 90px);
  font-weight: 800;
  line-height: 1em;
  letter-spacing: -0.02em;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.metric-label {
  font-size: clamp(18px, 1.5vw, 25px);
  font-weight: 300;
  line-height: 1.25em;
  color: var(--color-dark-80);
  margin: 0;
}

/* ========== Progress ========== */
.progress-indicator {
  width: 100%;
  height: 4px;
  background: rgba(82, 120, 162, 0.2);
  border-radius: 2px;
  overflow: hidden;
  margin: var(--spacing-lg) 0;
}

.progress-bar {
  height: 100%;
  background: var(--gradient-progress);
  border-radius: 2px;
  transition: width 0.6s ease;
}

.progress-bar.short {
  width: 33%;
}

.progress-bar.medium {
  width: 66%;
}

.progress-bar.full {
  width: 100%;
}

/* ========== Section dividers ========== */
.section-divider {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  margin: var(--spacing-2xl) 0;
}

.section-divider.light-blue-1 {
  background: var(--color-accent-light-1);
}

.section-divider.light-blue-2 {
  background: var(--color-accent-light-2);
}

.section-divider.light-blue-3 {
  background: var(--color-accent-light-3);
}

.section-divider.brand {
  background: var(--brand-primary);
}

/* ========== Numbered block ========== */
.numbered-block {
  position: relative;
  padding-top: var(--spacing-3xl);
}

/* ========== Grids ========== */
.grid-2-col {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-xl);
}

.grid-3-col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
}

.content-with-metric {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
}

.content-side {
  min-width: 0;
}

.metric-side {
  min-width: 0;
}

/* ========== Lists ========== */
.list-bullet {
  list-style: none;
  padding-left: 0;
  margin: 0 0 var(--spacing-md);
}

.list-bullet li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 16px;
  font-size: clamp(16px, 1.5vw, 20px);
  font-weight: 300;
  line-height: 1.35em;
  color: var(--color-dark-100);
}

.list-bullet li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 12px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brand-primary);
}

.list-numbered {
  list-style: none;
  padding-left: 0;
  margin: 0;
  counter-reset: item-counter;
}

.list-numbered li {
  position: relative;
  padding-left: 48px;
  margin-bottom: var(--spacing-md);
  font-size: clamp(16px, 1.5vw, 20px);
  font-weight: 300;
  line-height: 1.35em;
  color: var(--color-dark-100);
  counter-increment: item-counter;
}

.list-numbered li::before {
  content: counter(item-counter, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  font-size: clamp(28px, 3vw, 35px);
  font-weight: 800;
  color: var(--brand-primary);
}

/* ========== Rating ========== */
.rating {
  display: flex;
  gap: 4px;
  align-items: center;
}

.rating-star {
  color: var(--color-rating-star);
  font-size: 24px;
}

.rating-star.empty {
  color: var(--color-dark-20);
}

/* ========== Liquid metal (decor) ========== */
.liquid-metal {
  position: absolute;
  pointer-events: none;
  z-index: 0;
}

.liquid-metal-corner {
  top: 0;
  right: 0;
  width: min(50%, 400px);
  height: auto;
}

.liquid-metal-bg {
  bottom: 0;
  left: 0;
  width: 100%;
  height: auto;
}

.liquid-metal-center {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(70%, 500px);
  height: auto;
}

.liquid-metal-subtle {
  opacity: 0.2;
}

.liquid-metal-moderate {
  opacity: 0.5;
}

.liquid-metal-prominent {
  opacity: 0.7;
}

.liquid-metal-blur-light {
  filter: blur(7px);
}

.liquid-metal-blur-medium {
  filter: blur(14px);
}

.liquid-metal-blur-heavy {
  filter: blur(20px);
}

/* ========== Responsive ========== */
@media (min-width: 1440px) and (max-width: 1919px) {
  .container-content {
    max-width: 1100px;
  }
}

@media (min-width: 1024px) and (max-width: 1439px) {
  .grid-3-col,
  .grid-2-col {
    grid-template-columns: repeat(2, 1fr);
  }

  .content-with-metric {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .section {
    padding: var(--spacing-2xl) 0;
  }

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

  .pricing-card.featured {
    transform: none;
  }

  .pricing-card.featured:hover {
    transform: translateY(-4px);
  }
}

@media (max-width: 767px) {
  .container-content {
    padding: 0 var(--spacing-sm);
  }

  .section {
    padding: var(--spacing-2xl) 0;
  }

  .grid-3-col,
  .grid-2-col {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .content-with-metric {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .hero-pills {
    flex-direction: column;
    align-items: flex-start;
  }

  .testimonial-header {
    flex-direction: column;
    text-align: center;
  }

  .pricing-card {
    min-height: auto;
  }

  .pricing-card.featured {
    transform: none;
  }

  .pricing-card.featured:hover {
    transform: translateY(-4px);
  }
}