:root {
  --brand-cian: #37a4dc;
  --brand-cian-hover: #5cb8e6;
  --brand-black: #282828;
  --bg-dark: #1a1a1a;
  --bg-darker: #141414;
  --bg-card: #222222;
  --text-primary: #ffffff;
  --text-secondary: #a8a8a8;
  --text-muted: #6e6e6e;
  --border: #333333;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background-color: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--brand-cian);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--brand-cian-hover);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ============ NAV ============ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(26, 26, 26, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.nav__logo img {
  height: 28px;
  width: auto;
  display: block;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav__links > li {
  position: relative;
}

.nav__links > li > a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 10px 14px;
  display: block;
}

.nav__links > li > a:hover,
.nav__links > li:focus-within > a,
.nav__links > li:hover > a {
  color: var(--text-primary);
}

.nav__dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px;
  list-style: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
}

.nav__links > li:hover .nav__dropdown,
.nav__links > li:focus-within .nav__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(4px);
}

.nav__dropdown a {
  display: block;
  padding: 10px 14px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  border-radius: 6px;
}

.nav__dropdown a:hover {
  background: var(--brand-black);
  color: var(--brand-cian);
}

.nav__dropdown a span {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.btn {
  display: inline-block;
  background: var(--brand-cian);
  color: #0d0d0d;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 24px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

.btn:hover {
  background: var(--brand-cian-hover);
  color: #0d0d0d;
  transform: translateY(-1px);
}

.btn--ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn--ghost:hover {
  background: var(--bg-card);
  color: var(--brand-cian);
  border-color: var(--brand-cian);
}

.btn--small {
  padding: 9px 18px;
  font-size: 0.88rem;
}

.nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  margin: 5px 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

/* ============ SECTIONS ============ */
.section {
  padding: 100px 0;
}

.section--dark {
  background: var(--bg-darker);
}

.section--border {
  border-top: 1px solid var(--border);
}

.eyebrow {
  color: var(--brand-cian);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 20px;
}

h1, h2, h3, h4 {
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 700;
}

.h-hero {
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  max-width: 820px;
}

.h-section {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  max-width: 760px;
  margin-bottom: 20px;
}

.lead {
  color: var(--text-secondary);
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  max-width: 640px;
  margin-top: 24px;
}

/* ============ HERO ============ */
.hero {
  padding: 170px 0 100px;
  background: var(--bg-dark);
}

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 64px;
  align-items: center;
}

.hero__content {
  max-width: 620px;
}

.hero__metric {
  margin-top: 32px;
  font-size: 1rem;
  color: var(--text-muted);
}

.hero__metric strong {
  color: var(--brand-cian);
  font-weight: 700;
  font-size: 1.15rem;
  margin-right: 6px;
}

.hero__visual {
  position: relative;
}

/* ============ PRODUCT MOCK ============ */
.product-mock {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
}

.pm-window {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 13px 16px;
  background: var(--bg-darker);
  border-bottom: 1px solid var(--border);
}

.pm-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #3d3d3d;
}

.pm-url {
  margin-left: 10px;
  color: var(--text-muted);
  font-size: 0.82rem;
  letter-spacing: 0.01em;
}

.pm-panel {
  padding: 20px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.pm-chat {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 280px;
  overflow: hidden;
}

.pm-msg {
  max-width: 78%;
  padding: 11px 15px;
  border-radius: 14px;
  font-size: 0.92rem;
  line-height: 1.45;
  animation: pm-msg-in 0.4s ease both;
}

.pm-msg--in {
  align-self: flex-start;
  background: var(--bg-darker);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
  color: var(--text-primary);
}

.pm-msg--out {
  align-self: flex-end;
  background: rgba(55, 164, 220, 0.15);
  border: 1px solid var(--brand-cian);
  border-bottom-right-radius: 4px;
  color: var(--text-primary);
}

.pm-msg__sender {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 4px;
  color: var(--text-muted);
}

.pm-msg--out .pm-msg__sender {
  color: var(--brand-cian);
}

.pm-typing {
  align-self: flex-start;
  background: var(--bg-darker);
  border: 1px solid var(--border);
  border-radius: 14px;
  border-bottom-left-radius: 4px;
  padding: 13px 16px;
  gap: 5px;
  display: none;
}

.pm-typing--agent {
  align-self: flex-end;
  background: rgba(55, 164, 220, 0.15);
  border-color: var(--brand-cian);
  border-bottom-left-radius: 14px;
  border-bottom-right-radius: 4px;
}

.pm-typing--visible {
  display: inline-flex;
}

.pm-typing span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--text-muted);
  animation: pm-dot 1.2s ease infinite;
}

.pm-typing span:nth-child(2) {
  animation-delay: 0.2s;
}

.pm-typing span:nth-child(3) {
  animation-delay: 0.4s;
}

.pm-stats {
  display: flex;
  gap: 32px;
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.pm-stat strong {
  display: block;
  color: var(--brand-cian);
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.pm-stat span {
  color: var(--text-muted);
  font-size: 0.78rem;
}

@keyframes pm-msg-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pm-dot {
  0%, 60%, 100% {
    opacity: 0.35;
    transform: translateY(0);
  }
  30% {
    opacity: 1;
    transform: translateY(-3px);
  }
}

.hero__cta {
  display: flex;
  gap: 16px;
  margin-top: 44px;
  flex-wrap: wrap;
}

/* ============ TRUST STRIP ============ */
.trust {
  padding: 56px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.trust__label {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 32px;
}

.trust__items {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 48px;
  flex-wrap: wrap;
}

.trust__items span {
  color: var(--text-secondary);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  opacity: 0.75;
}

/* ============ CASE CARDS ============ */
.cases {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 56px;
}

.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.case-card:hover {
  border-color: var(--brand-cian);
  transform: translateY(-3px);
}

.case-card__tag {
  color: var(--text-muted);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.case-card__title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
  line-height: 1.35;
}

.case-card__text {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.case-card__metric {
  color: var(--brand-cian);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

/* ============ PILLARS ============ */
.pillars {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin-top: 56px;
}

.pillar {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  background: var(--bg-dark);
  transition: border-color 0.2s ease;
}

.pillar:hover {
  border-color: var(--brand-cian);
}

.pillar__num {
  color: var(--brand-cian);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  margin-bottom: 20px;
}

.pillar__title {
  font-size: 1.45rem;
  margin-bottom: 14px;
}

.pillar__text {
  color: var(--text-secondary);
  font-size: 0.98rem;
  flex-grow: 1;
  margin-bottom: 24px;
}

.pillar__link {
  font-weight: 600;
  font-size: 0.95rem;
}

.pillar__link::after {
  content: ' →';
}

/* ============ INDUSTRIES GRID ============ */
.industries {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  margin-top: 56px;
}

.industry {
  background: var(--bg-dark);
  padding: 40px 32px;
  display: block;
  transition: background 0.2s ease;
}

.industry:hover {
  background: var(--bg-card);
}

.industry__name {
  color: var(--text-primary);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.industry__desc {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.industry:hover .industry__name {
  color: var(--brand-cian);
}

/* ============ FEATURE GRID ============ */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-top: 56px;
}

.feature {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  background: var(--bg-dark);
}

.feature__title {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.feature__text {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

/* ============ SPLIT BLOCKS ============ */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
  margin-top: 64px;
}

.split__item h3 {
  font-size: 1.4rem;
  margin-bottom: 12px;
}

.split__item p {
  color: var(--text-secondary);
}

/* ============ STEPS / PHASES ============ */
.steps {
  margin-top: 56px;
  display: grid;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.step {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 32px;
  padding: 40px;
  background: var(--bg-dark);
  border-bottom: 1px solid var(--border);
}

.step:last-child {
  border-bottom: none;
}

.step__num {
  color: var(--brand-cian);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.step__title {
  font-size: 1.35rem;
  margin-bottom: 10px;
}

.step__text {
  color: var(--text-secondary);
  max-width: 640px;
}

.step__tags {
  display: flex;
  gap: 10px;
  margin-top: 18px;
  flex-wrap: wrap;
}

.step__tags span {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 14px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* ============ PRINCIPLES ============ */
.principles {
  counter-reset: principle;
  margin-top: 56px;
}

.principle {
  border-top: 1px solid var(--border);
  padding: 44px 0;
  display: grid;
  grid-template-columns: 100px 1fr 1.2fr;
  gap: 40px;
  align-items: baseline;
}

.principle:last-child {
  border-bottom: 1px solid var(--border);
}

.principle__num {
  color: var(--brand-cian);
  font-size: 1.1rem;
  font-weight: 600;
}

.principle__title {
  font-size: 1.4rem;
  font-weight: 600;
  line-height: 1.3;
}

.principle__text {
  color: var(--text-secondary);
  font-size: 0.98rem;
}

/* ============ CTA FINAL ============ */
.cta-final {
  padding: 120px 0;
  text-align: center;
  background: var(--bg-darker);
  border-top: 1px solid var(--border);
}

.cta-final h2 {
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  max-width: 800px;
  margin: 0 auto 40px;
}

/* ============ FORM ============ */
.form {
  max-width: 640px;
  margin-top: 48px;
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form__group {
  margin-bottom: 20px;
}

.form__group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form__group input,
.form__group textarea {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 1rem;
  padding: 13px 16px;
  transition: border-color 0.2s ease;
}

.form__group input:focus,
.form__group textarea:focus {
  outline: none;
  border-color: var(--brand-cian);
}

.form__group textarea {
  min-height: 140px;
  resize: vertical;
}

.form__status {
  margin-top: 16px;
  font-size: 0.95rem;
  color: var(--brand-cian);
}

.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 32px;
  margin-top: 64px;
}

.contact-info__item h4 {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 10px;
}

.contact-info__item p,
.contact-info__item a {
  color: var(--text-primary);
  font-size: 1.05rem;
}

/* ============ VIDEO SECTION ============ */
.video-section {
  text-align: center;
}

.video-section .h-section {
  margin-left: auto;
  margin-right: auto;
}

.video-section .lead {
  margin-left: auto;
  margin-right: auto;
}

.video-section .hero__cta {
  justify-content: center;
}

.video-wrap {
  margin: 56px auto 0;
  max-width: 1080px;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5);
}

.video-wrap video,
.video-wrap img {
  display: block;
  width: 100%;
  height: auto;
}

/* ============ FOOTER ============ */
.footer {
  background: var(--bg-darker);
  border-top: 1px solid var(--border);
  padding: 72px 0 40px;
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer__brand img {
  height: 30px;
  margin-bottom: 18px;
}

.footer__brand p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  max-width: 280px;
}

.footer__col h5 {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 18px;
}

.footer__col ul {
  list-style: none;
}

.footer__col li {
  margin-bottom: 10px;
}

.footer__col a {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.footer__col a:hover {
  color: var(--brand-cian);
}

.footer__phone span {
  display: block;
  color: var(--text-muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 2px;
}

.footer__bottom {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer__bottom p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer__social {
  display: flex;
  gap: 16px;
}

.footer__social img {
  height: 22px;
  width: 22px;
  opacity: 0.7;
  transition: opacity 0.2s ease;
}

.footer__social a:hover img {
  opacity: 1;
}

/* ============ REVEAL ANIMATION ============ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal--visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============ RESPONSIVE ============ */
@media (max-width: 900px) {
  .nav__toggle {
    display: block;
  }

  .nav__links {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--bg-darker);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 32px;
    gap: 0;
    border-bottom: 1px solid var(--border);
    display: none;
  }

  .nav__links--open {
    display: flex;
  }

  .nav__links > li > a {
    padding: 14px 0;
    font-size: 1.05rem;
  }

  .nav__dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    background: transparent;
    border: none;
    padding: 0 0 8px 16px;
  }

  .nav__cta {
    display: none;
  }

  .split {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .principle {
    grid-template-columns: 60px 1fr;
    gap: 24px;
  }

  .principle__text {
    grid-column: 2;
  }

  .step {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 32px 24px;
  }

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

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

  .section {
    padding: 72px 0;
  }

  .hero {
    padding: 140px 0 80px;
  }

  .hero__grid {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .hero__content {
    max-width: none;
  }

  .pm-chat {
    min-height: 220px;
  }
}

@media (max-width: 560px) {
  .footer__grid {
    grid-template-columns: 1fr;
  }

  .trust__items {
    gap: 24px;
  }

  .pm-chat {
    min-height: 180px;
  }

  .pm-msg {
    font-size: 0.85rem;
    padding: 9px 13px;
  }

  .pm-stats {
    gap: 20px;
  }
}