/* -----------------------------------------------------------------------------
   НордВейс — корпоративная заглушка
   Темы: светлая по умолчанию, тёмная через prefers-color-scheme
   ----------------------------------------------------------------------------- */

:root {
  color-scheme: light dark;

  --font: "Manrope", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  --bg: #f6f7fb;
  --bg-elevated: #ffffff;
  --text: #12151c;
  --text-muted: #5c6370;
  --border: #e4e7ef;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-soft: rgba(37, 99, 235, 0.12);
  --shadow: 0 18px 50px rgba(15, 23, 42, 0.08);
  --shadow-sm: 0 8px 24px rgba(15, 23, 42, 0.06);
  --radius: 14px;
  --radius-lg: 22px;
  --header-h: 72px;
  --focus: 0 0 0 3px var(--accent-soft), 0 0 0 1px var(--accent);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c0f14;
    --bg-elevated: #141922;
    --text: #eef1f7;
    --text-muted: #9aa3b5;
    --border: #252d3d;
    --accent: #60a5fa;
    --accent-hover: #93c5fd;
    --accent-soft: rgba(96, 165, 250, 0.2);
    --shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
    --shadow-sm: 0 12px 32px rgba(0, 0, 0, 0.35);
  }
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--accent-hover);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: none;
  box-shadow: var(--focus);
  border-radius: 6px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -100px;
  z-index: 1000;
  padding: 0.65rem 1rem;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  border-radius: 8px;
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 1rem;
}

.container {
  width: min(1120px, 100% - 2.5rem);
  margin-inline: auto;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--header-h);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

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

.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  box-shadow: var(--shadow-sm);
}

.nav {
  display: none;
}

.nav-list {
  display: flex;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list a {
  color: var(--text-muted);
  font-weight: 500;
  text-decoration: none;
}

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

.btn-header {
  display: none;
}

/* Mobile menu (details/summary, no JS) */

.nav-details {
  position: relative;
}

.nav-details > summary {
  list-style: none;
  cursor: pointer;
}

.nav-details > summary::-webkit-details-marker {
  display: none;
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-elevated);
}

.nav-toggle-bar {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--text);
}

.mobile-nav {
  position: absolute;
  right: 0;
  top: calc(100% + 0.5rem);
  min-width: 200px;
  padding: 0.75rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.nav-details:not([open]) .mobile-nav {
  display: none;
}

.mobile-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.mobile-nav-list a {
  display: block;
  padding: 0.65rem 0.85rem;
  border-radius: 10px;
  color: var(--text);
  font-weight: 500;
  text-decoration: none;
}

.mobile-nav-list a:hover {
  background: var(--accent-soft);
  color: var(--accent-hover);
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.35rem;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 12px;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition:
    background 0.18s ease,
    color 0.18s ease,
    border-color 0.18s ease,
    transform 0.15s ease;
}

.btn:active {
  transform: translateY(1px);
}

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

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

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

.btn-ghost:hover {
  border-color: var(--text-muted);
  background: color-mix(in srgb, var(--bg-elevated) 70%, transparent);
}

.btn-on-dark {
  background: #fff;
  color: #0f172a;
  flex-shrink: 0;
}

.btn-on-dark:hover {
  background: #e2e8f0;
  color: #0f172a;
}

.btn-full {
  width: 100%;
}

/* Hero */

.hero {
  position: relative;
  padding: clamp(3rem, 8vw, 5.5rem) 0 clamp(4rem, 10vw, 6rem);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: -20% -10% auto;
  height: 70%;
  background:
    radial-gradient(ellipse 80% 60% at 20% 0%, var(--accent-soft), transparent 55%),
    radial-gradient(ellipse 60% 50% at 90% 20%, rgba(124, 58, 237, 0.15), transparent 50%);
  pointer-events: none;
}

@media (prefers-color-scheme: dark) {
  .hero-bg {
    background:
      radial-gradient(ellipse 80% 60% at 20% 0%, var(--accent-soft), transparent 55%),
      radial-gradient(ellipse 60% 50% at 90% 20%, rgba(124, 58, 237, 0.22), transparent 50%);
  }
}

.hero-inner {
  position: relative;
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: start;
}

@media (min-width: 900px) {
  .hero-inner {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
  }
}

.eyebrow {
  margin: 0 0 0.75rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 4.5vw, 2.85rem);
  line-height: 1.12;
  letter-spacing: -0.03em;
}

.lead {
  margin: 0 0 1.75rem;
  font-size: 1.08rem;
  color: var(--text-muted);
  max-width: 36ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem 1rem;
  margin: 0;
  padding: 1.25rem 0 0;
  border-top: 1px solid var(--border);
}

@media (max-width: 380px) {
  .hero-stats {
    grid-template-columns: 1fr;
  }

  .hero-stats dd {
    font-size: 1.2rem;
  }
}

.hero-stats dt {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
}

.hero-stats dd {
  margin: 0.35rem 0 0;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.hero-panel {
  display: flex;
  justify-content: center;
}

@media (min-width: 900px) {
  .hero-panel {
    justify-content: flex-end;
  }
}

.hero-card {
  width: min(100%, 380px);
  padding: 1.75rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.hero-card-label {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.hero-card-title {
  margin: 0.5rem 0 1rem;
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.35;
}

.hero-card-list {
  margin: 0 0 1.25rem;
  padding-left: 1.1rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.hero-card-list li + li {
  margin-top: 0.4rem;
}

.hero-card-badge {
  display: inline-block;
  padding: 0.4rem 0.75rem;
  font-size: 0.78rem;
  font-weight: 600;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
}

/* Sections */

.section {
  padding: clamp(3rem, 7vw, 5rem) 0;
}

.section-alt {
  background: color-mix(in srgb, var(--bg-elevated) 55%, var(--bg));
  border-block: 1px solid var(--border);
}

.section-head {
  max-width: 640px;
  margin-bottom: 2.5rem;
}

.section-head h2,
.split-copy h2,
#contact-title {
  margin: 0 0 0.75rem;
  font-size: clamp(1.6rem, 3vw, 2rem);
  letter-spacing: -0.02em;
}

.section-intro {
  margin: 0;
  color: var(--text-muted);
  font-size: 1.05rem;
}

.cards {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 700px) {
  .cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card {
  padding: 1.75rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease,
    transform 0.2s ease;
}

.card:hover {
  border-color: color-mix(in srgb, var(--accent) 35%, var(--border));
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.card h3 {
  margin: 0 0 0.65rem;
  font-size: 1.1rem;
}

.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.card-icon {
  width: 44px;
  height: 44px;
  margin-bottom: 1rem;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
  font-size: 0.85rem;
}

/* Split / approach */

.split {
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 800px) {
  .split {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }
}

.split-copy p {
  color: var(--text-muted);
}

.checklist {
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.checklist li {
  position: relative;
  padding-left: 1.75rem;
  margin-bottom: 0.75rem;
  color: var(--text);
}

.checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.split-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 220px;
}

.orbit {
  position: relative;
  width: min(280px, 70vw);
  aspect-ratio: 1;
}

.orbit-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px dashed var(--border);
  animation: spin 28s linear infinite;
}

.orbit-dot {
  position: absolute;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 6px var(--accent-soft);
}

.orbit-dot-a {
  top: 8%;
  left: 50%;
  transform: translateX(-50%);
}

.orbit-dot-b {
  bottom: 18%;
  right: 10%;
  background: #7c3aed;
  box-shadow: 0 0 0 6px rgba(124, 58, 237, 0.2);
}

.orbit-dot-c {
  bottom: 22%;
  left: 12%;
  width: 10px;
  height: 10px;
  background: var(--text-muted);
  box-shadow: none;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* CTA band */

.cta-band {
  background: linear-gradient(120deg, #1e3a8a 0%, #312e81 45%, #4c1d95 100%);
  color: #e8ecff;
  padding: clamp(2.5rem, 6vw, 3.5rem) 0;
}

.cta-band h2 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.45rem, 3vw, 1.85rem);
  color: #fff;
  letter-spacing: -0.02em;
}

.cta-band p {
  margin: 0;
  max-width: 52ch;
  color: rgba(232, 236, 255, 0.88);
}

.cta-inner {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  align-items: flex-start;
}

@media (min-width: 720px) {
  .cta-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

/* Contact */

.contact-grid {
  display: grid;
  gap: 2.5rem;
}

@media (min-width: 800px) {
  .contact-grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

.contact-lead {
  margin-top: 0.5rem;
}

.contact-block {
  margin: 1.5rem 0 0;
  font-style: normal;
  color: var(--text-muted);
}

.contact-block a {
  font-weight: 600;
}

.contact-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  padding: 1.75rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.field-full {
  grid-column: 1 / -1;
}

.field-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.7rem 0.85rem;
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  transition: border-color 0.15s ease;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: var(--text-muted);
  opacity: 0.75;
}

.contact-form input:hover,
.contact-form textarea:hover {
  border-color: var(--text-muted);
}

.contact-form .btn-full {
  grid-column: 1 / -1;
}

.form-note {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 0.78rem;
  color: var(--text-muted);
}

@media (max-width: 520px) {
  .contact-form {
    grid-template-columns: 1fr;
  }
}

/* Footer */

.site-footer {
  padding: 1.75rem 0;
  border-top: 1px solid var(--border);
  background: var(--bg-elevated);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: flex-start;
}

@media (min-width: 600px) {
  .footer-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.footer-brand {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links a {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--accent);
}

/* Desktop nav */

@media (min-width: 880px) {
  .nav {
    display: block;
  }

  .btn-header {
    display: inline-flex;
  }

  .nav-details {
    display: none;
  }
}

/* Reduce motion */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .orbit-ring {
    animation: none;
  }

  .btn:active,
  .card:hover {
    transform: none;
  }
}