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

:root {
  --color-bg: #f8f9fb;
  --color-surface: #ffffff;
  --color-text: #1a1d26;
  --color-text-muted: #5c6370;
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-accent: #0ea5e9;
  --color-border: #e2e8f0;
  --color-success: #16a34a;
  --color-danger: #dc2626;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 12px 48px rgba(37, 99, 235, 0.12);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --max-width: 1120px;
  --header-height: 72px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

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

ul {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.logo span {
  color: var(--color-primary);
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav a {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  transition: color 0.2s;
}

.nav a:hover {
  color: var(--color-text);
}

.nav__cta {
  background: var(--color-primary);
  color: #fff !important;
  padding: 10px 20px;
  border-radius: 8px;
  font-weight: 500;
}

.nav__cta:hover {
  background: var(--color-primary-dark);
}

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.burger.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.burger.is-open span:nth-child(2) {
  opacity: 0;
}

.burger.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, transform 0.15s;
}

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

.btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
}

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

.btn--outline {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}

.btn--outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn--full {
  width: 100%;
}

/* Hero */

.hero {
  padding: calc(var(--header-height) + 60px) 0 80px;
  background: linear-gradient(160deg, #eff6ff 0%, var(--color-bg) 50%, #f0fdfa 100%);
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero__badge {
  display: inline-block;
  background: #dbeafe;
  color: var(--color-primary-dark);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero__lead {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  margin-bottom: 32px;
  max-width: 520px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero__card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  box-shadow: var(--shadow-lg);
  text-align: center;
  border: 1px solid var(--color-border);
}

.hero__card-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.hero__card-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.hero__card-text {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* Value flow */

.value-flow {
  padding: 80px 0;
  background: linear-gradient(135deg, #1e40af 0%, #6d28d9 45%, #0891b2 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.value-flow::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 40%);
  pointer-events: none;
}

.value-flow .container {
  position: relative;
}

.value-flow__header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}

.value-flow__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.value-flow__lead {
  font-size: 1.1rem;
  line-height: 1.6;
  opacity: 0.9;
}

.value-flow__steps {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  gap: 12px;
  align-items: stretch;
}

.value-step {
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  position: relative;
  transition: transform 0.2s, background 0.2s;
}

.value-step:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.18);
}

.value-step--1 { border-top: 3px solid #93c5fd; }
.value-step--2 { border-top: 3px solid #c4b5fd; }
.value-step--3 { border-top: 3px solid #67e8f9; }
.value-step--4 { border-top: 3px solid #86efac; }

.value-step__num {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  opacity: 0.6;
  margin-bottom: 12px;
}

.value-step__icon {
  font-size: 2rem;
  margin-bottom: 14px;
}

.value-step h3 {
  font-size: 1.05rem;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.value-step p {
  font-size: 0.88rem;
  line-height: 1.55;
  opacity: 0.85;
}

.value-flow__arrow {
  display: flex;
  align-items: center;
  font-size: 1.5rem;
  opacity: 0.5;
  padding: 0 4px;
}

.value-flow__note {
  text-align: center;
  max-width: 640px;
  margin: 40px auto 0;
  font-size: 0.9rem;
  line-height: 1.55;
  opacity: 0.75;
  padding: 16px 24px;
  background: rgba(0, 0, 0, 0.15);
  border-radius: 100px;
}

/* Sections */

.section {
  padding: 80px 0;
}

.section--alt {
  background: var(--color-surface);
}

.section__title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  text-align: center;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section__subtitle {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 1.05rem;
  max-width: 720px;
  margin: 0 auto 48px;
}

/* Pricing */

.pricing-discount {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px 32px;
  margin: -24px auto 40px;
}

.pricing-discount__item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  padding: 10px 20px;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.pricing-discount__value {
  font-weight: 700;
  color: var(--color-success);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  align-items: stretch;
}

.pricing-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  position: relative;
  transition: box-shadow 0.2s, border-color 0.2s;
}

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

.pricing-card--highlight {
  border-color: #93c5fd;
  background: linear-gradient(180deg, #eff6ff 0%, var(--color-surface) 100%);
}

.pricing-card--premium {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
}

.pricing-card__badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 100px;
  white-space: nowrap;
}

.pricing-card__tier {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.pricing-card__examples {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-bottom: 16px;
  min-height: 2.6em;
}

.pricing-card__price {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.pricing-card__price span {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-top: 2px;
}

/* Extras */

.extras {
  margin-top: 56px;
  padding-top: 48px;
  border-top: 1px solid var(--color-border);
}

.extras__title {
  font-size: 1.35rem;
  text-align: center;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.extras__title span {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.extras__intro {
  text-align: center;
  color: var(--color-text-muted);
  max-width: 680px;
  margin: 0 auto 32px;
  line-height: 1.6;
}

.extras-card {
  max-width: 720px;
  margin: 0 auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  border-left: 4px solid var(--color-primary);
}

.extras-card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.extras-card h4 {
  font-size: 1.05rem;
}

.extras-card__price {
  font-weight: 700;
  color: var(--color-primary);
  white-space: nowrap;
}

.extras-card p:last-child {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

/* Ask */

.ask {
  margin-top: 48px;
  padding: 36px 32px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
}

.ask__title {
  font-size: 1.35rem;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}

.ask__text {
  color: var(--color-text-muted);
  margin-bottom: 24px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

.ask__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.ask__link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  border-radius: 10px;
  font-size: 0.92rem;
  font-weight: 600;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  transition: border-color 0.2s, transform 0.15s, box-shadow 0.2s;
}

.ask__icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.ask__icon--max {
  border-radius: 5px;
}

.ask__link:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.ask__link--tg {
  border-color: #7dd3fc;
  color: #0088cc;
}

.ask__link--max {
  border-color: #c4b5fd;
  color: #6d28d9;
}

.ask__link--mail {
  border-color: #fca5a5;
  color: #dc2626;
}

.ask__link--site {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Concept */

.concept-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.concept-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  transition: box-shadow 0.2s;
}

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

.concept-card__icon {
  font-size: 2.25rem;
  margin-bottom: 16px;
}

.concept-card h3 {
  font-size: 1.25rem;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.concept-card__block {
  margin-bottom: 20px;
}

.concept-card__block:last-child {
  margin-bottom: 0;
}

.concept-card__label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.concept-card__block p:last-child {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

/* SEO */

.seo-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.seo-block {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px;
}

.seo-block h3 {
  font-size: 1.15rem;
  margin-bottom: 20px;
}

.seo-block ul li {
  padding: 10px 0 10px 28px;
  position: relative;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
}

.seo-block ul li:last-child {
  border-bottom: none;
}

.seo-block ul li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: 700;
}

.seo-block--result {
  background: linear-gradient(135deg, #2563eb, #0ea5e9);
  color: #fff;
  border: none;
}

.seo-block--result h3 {
  opacity: 0.9;
}

.seo-block--result p {
  opacity: 0.9;
}

.seo-block__big {
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}

/* Benefits */

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 24px;
}

.benefit-card {
  grid-column: span 2;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: box-shadow 0.2s;
}

.section--alt .benefit-card {
  background: var(--color-surface);
}

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

.benefit-card__icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.benefit-card h3 {
  font-size: 1.05rem;
  margin-bottom: 12px;
  line-height: 1.35;
}

.benefit-card p {
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

/* CTA / Form */

.cta {
  background: linear-gradient(160deg, #1e3a5f 0%, #1e40af 100%);
  color: #fff;
}

.cta__inner {
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
}

.cta h2 {
  font-size: 2rem;
  margin-bottom: 12px;
}

.cta p {
  opacity: 0.85;
  margin-bottom: 32px;
}

.form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form input {
  width: 100%;
  padding: 14px 18px;
  border: 2px solid transparent;
  border-radius: 10px;
  font-size: 1rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
}

.form input:focus {
  border-color: var(--color-accent);
}

.form__radios {
  border: none;
  padding: 0;
  margin: 0;
  text-align: left;
}

.form__radios legend {
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 10px;
  opacity: 0.9;
}

.form__radios-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.form__radio {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 10px;
  background: rgba(255, 255, 255, 0.1);
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 10px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: border-color 0.2s, background 0.2s;
}

.form__radio:has(input:checked) {
  border-color: var(--color-accent);
  background: rgba(255, 255, 255, 0.18);
}

.form__radio input {
  width: auto;
  accent-color: var(--color-accent);
}

.form__honey {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.form__note {
  font-size: 0.9rem;
  min-height: 1.4em;
}

.form__note--success {
  color: #86efac;
}

.form__note--error {
  color: #fca5a5;
}

/* Footer */

.footer {
  padding: 40px 0;
  background: var(--color-text);
  color: rgba(255, 255, 255, 0.7);
}

.footer__inner {
  text-align: center;
}

.footer .logo {
  display: inline-block;
  color: #fff;
  margin-bottom: 12px;
}

.footer .logo span {
  color: var(--color-accent);
}

.footer__copy {
  margin-top: 20px;
  font-size: 0.85rem;
  opacity: 0.5;
}

/* Responsive */

@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing-grid .pricing-card:last-child {
    grid-column: span 2;
    max-width: 50%;
    margin: 0 auto;
    width: 100%;
  }

  .concept-grid {
    grid-template-columns: 1fr;
  }

  .value-flow {
    padding: 60px 0;
  }

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

  .benefit-card {
    grid-column: auto;
  }
}

@media (max-width: 768px) {
  .burger {
    display: flex;
  }

  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-surface);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s, opacity 0.3s;
  }

  .nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav__cta {
    text-align: center;
    width: 100%;
  }

  .hero__inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

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

  .hero__actions {
    justify-content: center;
  }

  .value-flow__steps {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .value-flow__arrow {
    display: none;
  }

  .value-flow__note {
    border-radius: var(--radius);
  }

  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .pricing-grid .pricing-card:last-child {
    grid-column: span 1;
    max-width: 100%;
  }

  .seo-grid {
    grid-template-columns: 1fr;
  }

  .benefits-grid {
    grid-template-columns: 1fr;
  }

  .benefit-card {
    grid-column: auto;
    max-width: 100%;
    margin: 0;
  }

  .form__row {
    grid-template-columns: 1fr;
  }

  .form__radios-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .section {
    padding: 60px 0;
  }

  .pricing-discount {
    flex-direction: column;
    align-items: stretch;
  }

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

  .extras-card__head {
    flex-direction: column;
    align-items: flex-start;
  }

  .ask {
    padding: 28px 20px;
  }

  .ask__links {
    flex-direction: column;
    align-items: stretch;
  }
}