:root {
  --bg: #0a0a0a;
  --bg-elevated: #111111;
  --bg-card: #141414;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(193, 255, 0, 0.35);
  --accent: #c1ff00;
  --accent-hover: #d4ff33;
  --text: #ffffff;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;
  --dark-on-accent: #0a0a0a;
  --content-max: 1280px;
  --gutter: clamp(20px, 4vw, 48px);
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-glow: 0 0 80px rgba(193, 255, 0, 0.18);
  --font: "Inter", system-ui, -apple-system, sans-serif;
  /* Icon scale — ratios from design mockup vs adjacent text */
  --icon-problem: clamp(68px, 7.15vw, 88px);
  --icon-approach-ring: clamp(99px, 10.4vw, 120px);
  --icon-approach-glyph: clamp(62px, 6.5vw, 75px);
  --icon-trust: clamp(57px, 5.85vw, 68px);
}

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

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.5;
  overflow-x: hidden;
}

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

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

button,
input,
select,
textarea {
  font: inherit;
}

.accent {
  color: var(--accent);
}

/* PNG icons — drop baked-in black square, keep neon glyph */
.icon-neon {
  mix-blend-mode: screen;
}

/* UI glyphs — inline SVG, currentColor (§9, §10) */
.ui-icon {
  display: block;
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  overflow: visible;
}

.ui-icon--sm {
  width: 18px;
  height: 18px;
}

.ui-icon--accent {
  color: var(--accent);
}

.ui-icon--dark {
  color: var(--dark-on-accent);
}

.ui-icon--muted {
  color: var(--text-dim);
}

.container {
  width: min(var(--content-max), calc(100% - var(--gutter) * 2));
  margin-inline: auto;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding-top: clamp(10px, 1.2vw, 14px);
  background: rgba(10, 10, 10, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header__inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  min-height: 72px;
  padding-bottom: clamp(8px, 1vw, 12px);
}

.logo {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo__img {
  flex-shrink: 0;
  width: clamp(62px, 5.8vw, 76px);
  height: clamp(62px, 5.8vw, 76px);
  object-fit: contain;
}

.logo__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.logo__name {
  font-size: 0.95rem;
  font-weight: 600;
  white-space: nowrap;
}

.logo__tag {
  font-size: 0.7rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.nav {
  display: flex;
  justify-content: center;
  gap: clamp(16px, 2vw, 32px);
}

.nav a {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color 0.2s;
}

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

.header__actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
}

.burger span {
  display: block;
  width: 18px;
  height: 2px;
  margin-inline: auto;
  background: var(--text);
}

.mobile-nav {
  display: none;
  flex-direction: column;
  gap: 12px;
  padding: 16px var(--gutter) 24px;
  border-top: 1px solid var(--border);
}

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

.mobile-nav:not([hidden]) {
  display: flex;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
  white-space: nowrap;
}

.btn:disabled {
  cursor: wait;
  opacity: 0.72;
}

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

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

.btn--outline {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.25);
  color: var(--text);
}

.btn--outline:hover {
  border-color: rgba(255, 255, 255, 0.45);
}

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

.btn--ghost:hover {
  background: rgba(193, 255, 0, 0.08);
}

.btn--muted {
  background: #1f1f1f;
  color: var(--text);
  border-color: var(--border);
}

.btn--muted:hover {
  background: #2a2a2a;
}

.btn--sm {
  padding: 10px 16px;
  font-size: 0.82rem;
}

.btn--lg {
  padding: 16px 28px;
  font-size: 1rem;
}

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

.link-accent {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0;
  border: 0;
  background: none;
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
}

.link-accent:hover {
  text-decoration: underline;
}

/* Hero */
.hero {
  position: relative;
  padding: clamp(48px, 8vw, 96px) 0 clamp(64px, 10vw, 120px);
}

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(340px, 1.08fr);
  gap: clamp(20px, 3.5vw, 56px);
  align-items: center;
}

.hero__title {
  margin: 0 0 20px;
  font-size: clamp(2rem, 4.2vw, 3.25rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
  text-transform: uppercase;
}

.hero__lead {
  margin: 0 0 28px;
  max-width: 52ch;
  color: var(--text-muted);
  font-size: clamp(0.95rem, 1.5vw, 1.05rem);
}

.hero__list {
  margin: 0 0 32px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.hero__list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.hero__list .ui-icon {
  width: 1.15em;
  height: 1.15em;
  margin-top: 0.12em;
}

.hero__note .ui-icon {
  width: 2.9em;
  height: 2.9em;
  margin-top: 0;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

.hero__note {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0;
  max-width: 46ch;
  font-size: 0.8rem;
  color: var(--text-dim);
  line-height: 1.45;
}

.hero__visual {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
}

.hero__composed {
  display: block;
  width: min(100%, clamp(520px, 64vw, 920px));
  height: auto;
  aspect-ratio: 1951 / 1451;
  object-fit: contain;
  margin-inline: auto;
}

/* Sections */
.section {
  padding: clamp(64px, 9vw, 110px) 0;
}

.section.problems {
  padding-bottom: clamp(28px, 4vw, 44px);
}

.section.approach {
  padding-top: clamp(28px, 4vw, 44px);
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: clamp(32px, 5vw, 48px);
}

.section-head--center {
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.section-title {
  margin: 0;
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-title--center {
  text-align: center;
  margin-bottom: clamp(32px, 5vw, 48px);
}

.section-subtitle {
  margin: 12px 0 0;
  color: var(--text-muted);
  font-size: 1rem;
}

/* Problems — 4 cards in one row (design mockup) */
.problems__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 20px);
}

.card {
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  isolation: isolate;
}

.card__icon-img {
  display: block;
  width: var(--icon-problem);
  height: var(--icon-problem);
  object-fit: contain;
  margin-inline: auto;
  margin-bottom: 18px;
}

.card__title {
  margin: 0 0 10px;
  font-size: 1.05rem;
  font-weight: 600;
}

.card__text {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.55;
}

/* Approach */
.approach__steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.approach__step {
  position: relative;
  text-align: center;
  padding: 0 8px;
}

.approach__step:not(:last-child)::after {
  content: "";
  position: absolute;
  top: calc(var(--icon-approach-ring) / 2);
  right: -8px;
  width: calc(100% - var(--icon-approach-ring));
  height: 0;
  border-top: 2px dotted rgba(193, 255, 0, 0.35);
  transform: translateX(50%);
  pointer-events: none;
}

.approach__icon {
  display: grid;
  place-items: center;
  width: var(--icon-approach-ring);
  height: var(--icon-approach-ring);
  margin: 0 auto 16px;
  border: 1.5px solid rgba(193, 255, 0, 0.35);
  border-radius: 50%;
  background: transparent;
  isolation: isolate;
}

.approach__icon-img {
  width: var(--icon-approach-glyph);
  height: var(--icon-approach-glyph);
  object-fit: contain;
}

.approach__title {
  margin: 0 0 8px;
  font-size: 0.88rem;
  font-weight: 600;
}

.approach__text {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.78rem;
  line-height: 1.45;
}

/* Cases */
.cases__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-bottom: clamp(40px, 6vw, 64px);
}

.case-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  overflow: hidden;
}

a.case-card {
  display: block;
  color: inherit;
  text-decoration: none;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

a.case-card:hover {
  border-color: rgba(193, 255, 0, 0.35);
  transform: translateY(-2px);
}

a.case-card:hover .case-card__stat {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.case-card__img {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg-elevated);
}

.case-card__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.case-card__body {
  padding: 20px;
}

.case-card__tag {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
}

.case-card__title {
  margin: 0 0 8px;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.35;
}

.case-card__desc {
  margin: 0 0 12px;
  color: var(--text-muted);
  font-size: 0.82rem;
  line-height: 1.5;
}

.case-card__stat {
  margin: 0;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 600;
}

.trust {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
  padding-top: 8px;
}

.trust__item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  isolation: isolate;
}

.trust__icon-slot {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: var(--icon-trust);
  height: var(--icon-trust);
  line-height: 0;
}

.trust__icon-slot--glyph {
  color: var(--accent);
}

.trust__icon-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.trust__glyph {
  display: block;
  width: calc(var(--icon-trust) * 0.72);
  height: calc(var(--icon-trust) * 0.72);
}

.trust__item p {
  margin: 0;
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.45;
}

.trust__item strong {
  display: block;
  color: var(--text);
  font-weight: 600;
  margin-bottom: 2px;
}

/* Pricing */
.pricing__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.price-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
}

.price-card--featured {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-glow);
}

.price-card__badge {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--dark-on-accent);
  font-size: 0.7rem;
  font-weight: 700;
}

.price-card__title {
  margin: 0 0 10px;
  font-size: 1.1rem;
  font-weight: 600;
}

.price-card__desc {
  margin: 0 0 20px;
  flex: 1;
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.5;
}

.price-card__price {
  margin: 0 0 20px;
  font-size: 1.5rem;
  font-weight: 700;
}

.pricing__note .ui-icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.pricing__note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin: 0;
  color: var(--text-dim);
  font-size: 0.82rem;
  text-align: center;
}

/* CTA — card + glow + grain (design mockup) */
.cta__box {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  padding: clamp(48px, 7vw, 72px) clamp(40px, 6vw, 64px);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: calc(var(--radius) + 4px);
  background:
    linear-gradient(118deg, #141414 0%, #101010 42%, #0e0e0e 100%);
}

.cta__box::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 52% 95% at 88% 52%, rgba(193, 255, 0, 0.2) 0%, rgba(193, 255, 0, 0.07) 38%, transparent 68%),
    radial-gradient(ellipse 35% 60% at 12% 88%, rgba(193, 255, 0, 0.04) 0%, transparent 55%);
  pointer-events: none;
  z-index: 0;
}

.cta__box::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.22;
  background-image:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 256 256'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.55'/%3E%3C/svg%3E"),
    repeating-linear-gradient(
      100deg,
      transparent 0,
      transparent 28px,
      rgba(255, 255, 255, 0.018) 28px,
      rgba(255, 255, 255, 0.018) 29px
    );
  background-size: 160px 160px, auto;
  mix-blend-mode: overlay;
  pointer-events: none;
  z-index: 0;
}

.cta__box > * {
  position: relative;
  z-index: 1;
}

.cta__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(32px, 5vw, 72px);
}

.cta__content {
  flex: 1 1 0;
  min-width: 0;
  max-width: 52rem;
}

.cta__action {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.cta__title {
  margin: 0 0 16px;
  font-size: clamp(1.75rem, 3.2vw, 2.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.cta__text {
  margin: 0;
  max-width: 42ch;
  color: var(--text-muted);
  font-size: clamp(0.95rem, 1.4vw, 1.05rem);
  line-height: 1.55;
}

.btn--cta {
  min-height: 60px;
  padding: 18px 36px;
  border-radius: 999px;
  font-size: 1.05rem;
  gap: 10px;
}

.btn--cta .ui-icon--telegram {
  width: 20px;
  height: 20px;
}

.ui-icon--telegram {
  width: 18px;
  height: 18px;
  fill: currentColor;
  overflow: visible;
  transform: scale(0.9);
  transform-origin: center;
}

/* Footer */
.footer {
  padding: 40px 0 48px;
  border-top: 1px solid var(--border);
}

.footer__inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
}

.footer__copy {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.8rem;
  white-space: nowrap;
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  place-items: center;
  padding: 20px;
}

.modal[hidden] {
  display: none;
}

.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.72);
}

.modal__card {
  position: relative;
  z-index: 1;
  width: min(820px, calc(100vw - 40px));
  max-height: calc(100vh - 40px);
  overflow: auto;
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
}

.modal__card--wide {
  width: min(1120px, calc(100vw - 40px));
}

.modal__close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: transparent;
  color: var(--text);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
}

.modal__title {
  margin: 0 0 8px;
  font-size: 1.5rem;
  font-weight: 700;
}

.modal__lead {
  margin: 0 0 24px;
  color: var(--text-muted);
}

.form__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.field__label {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.field__input {
  width: 100%;
  min-height: 50px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text);
}

.field__input:focus {
  outline: 2px solid rgba(193, 255, 0, 0.35);
  outline-offset: 1px;
}

.field__textarea {
  min-height: 120px;
  resize: vertical;
}

.cases-modal__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.case-card--modal .case-card__body {
  padding: 16px;
}

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 300;
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: var(--dark-on-accent);
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.toast[hidden] {
  display: none;
}

body.modal-open {
  overflow: hidden;
}

/* Responsive */
@media (max-width: 1100px) {
  .problems__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .approach__steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    row-gap: 32px;
  }

  .approach__step::after {
    display: none;
  }

  .trust {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 960px) {
  .nav,
  .header__actions .btn--ghost {
    display: none;
  }

  .burger {
    display: flex;
  }

  .header__inner {
    grid-template-columns: 1fr auto;
  }

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

  .hero__visual {
    order: -1;
    justify-content: center;
    min-height: 0;
  }

  .hero__composed {
    width: min(100%, 440px);
  }

  .cases__grid,
  .pricing__grid,
  .cases-modal__grid {
    grid-template-columns: 1fr;
  }

  .cta__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 28px;
  }

  .cta__action {
    width: 100%;
    justify-content: flex-start;
  }

  .footer__inner {
    grid-template-columns: 1fr;
    text-align: center;
    justify-items: center;
  }

  .nav--footer {
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (max-width: 768px) {
  .problems__grid {
    grid-template-columns: 1fr;
  }

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

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

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

  .section-head {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 430px) {
  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }
}