:root {
  /* Backgrounds */
  --bg-base: #0B1220;
  --bg-surface: #0F172A;
  --bg-card: #1E293B;
  --bg-card-hover: #243347;

  /* Accents */
  --accent-blue: #2563EB;
  --accent-blue-hover: #1D4ED8;
  --accent-cyan: #22D3EE;
  --accent-cyan-light: #67E8F9;

  /* Text */
  --text-primary: #FFFFFF;
  --text-secondary: #F1F5F9;
  --text-muted: #E2EBF0;
  --text-disabled: #64748B;

  /* Status */
  --status-live: #22C55E;
  --status-warning: #F59E0B;
  --status-error: #EF4444;

  /* Borders */
  --border-card: rgba(255, 255, 255, 0.08);
  --border-active: var(--accent-cyan);
  --border-divider: rgba(255, 255, 255, 0.06);

  /* Fonts */
  --font-sans: 'Space Grotesk', system-ui, -apple-system, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, monospace;

  /* Layout */
  --container-max: 1280px;
  --container-pad: 24px;

  /* Motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --t-fast: 150ms;
  --t-std: 250ms;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-secondary);
  background: var(--bg-base);
  min-height: 100vh;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--t-fast) var(--ease);
}

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

button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }

input { font: inherit; color: inherit; }

ul, ol { list-style: none; }

:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- Utilities ---------- */

.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.muted { color: var(--text-disabled); font-weight: 600; }

.eyebrow {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-disabled);
  margin-bottom: 20px;
}

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

.dot {
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 999px;
  margin-right: 8px;
  vertical-align: middle;
}
.dot--live  { background: var(--status-live); box-shadow: 0 0 8px rgba(34,197,94,0.6); }
.dot--cyan  { background: var(--accent-cyan); box-shadow: 0 0 8px rgba(34,211,238,0.5); }

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 14px;
  border-radius: 8px;
  padding: 12px 22px;
  transition: background var(--t-std) var(--ease),
              border-color var(--t-std) var(--ease),
              color var(--t-std) var(--ease),
              box-shadow var(--t-std) var(--ease),
              transform var(--t-fast) var(--ease);
  white-space: nowrap;
}

.btn--sm { padding: 8px 16px; font-size: 13px; }

.btn--primary {
  background: var(--accent-blue);
  color: var(--text-primary);
  box-shadow: 0 0 0 1px rgba(37,99,235,0.0), 0 4px 18px rgba(37,99,235,0.25);
}
.btn--primary:hover {
  background: var(--accent-blue-hover);
  color: var(--text-primary);
  box-shadow: 0 0 0 1px rgba(34,211,238,0.2), 0 6px 24px rgba(34,211,238,0.18);
  transform: translateY(-1px);
}
.btn--primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* ---------- Logo / header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 18, 32, 0.72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-divider);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  height: 64px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 15px;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}
.logo:hover { color: var(--text-primary); }

.logo__mark {
  display: inline-grid;
  place-items: center;
  width: 26px; height: 26px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
  color: var(--bg-base);
  font-size: 15px;
  box-shadow: 0 0 14px rgba(34,211,238,0.35);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-list a {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.01em;
}

/* ---------- Sections ---------- */

.section {
  padding: 96px 0;
  position: relative;
}

.section__title {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 24px;
  max-width: 880px;
}

.section__title--center {
  text-align: center;
  margin-inline: auto;
}

.section__lead {
  font-size: 17px;
  line-height: 1.6;
  color: var(--text-muted);
  max-width: 680px;
  margin-bottom: 48px;
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  padding: 88px 0 112px;
  overflow: hidden;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(37,99,235,0.18) 0%, transparent 60%),
              radial-gradient(ellipse 60% 50% at 80% 30%, rgba(34,211,238,0.10) 0%, transparent 65%),
              var(--bg-base);
}

.hero__grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black 30%, transparent 75%);
  pointer-events: none;
  z-index: 0;
}

.hero__inner {
  position: relative;
  z-index: 1;
  max-width: 920px;
  text-align: left;
  animation: hero-rise 700ms var(--ease) both;
}

.hero__title {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: clamp(36px, 6vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 24px;
}

.hero__title-accent {
  background: linear-gradient(120deg, var(--accent-cyan) 0%, var(--accent-cyan-light) 50%, var(--accent-blue) 100%);
  -webkit-background-clip: text;
          background-clip: text;
  color: transparent;
}

.hero__sub {
  font-size: 18px;
  line-height: 1.6;
  color: var(--text-muted);
  max-width: 640px;
  margin-bottom: 36px;
}

.hero__signals {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-top: 32px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

@keyframes hero-rise {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------- Email form ---------- */

.email-form {
  display: flex;
  gap: 8px;
  max-width: 520px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-card);
  border-radius: 12px;
  padding: 6px;
  transition: border-color var(--t-std) var(--ease), box-shadow var(--t-std) var(--ease);
}

.email-form:focus-within {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px rgba(34,211,238,0.15), 0 0 32px rgba(34,211,238,0.08);
}

.email-form input {
  flex: 1;
  min-width: 0;
  padding: 12px 14px;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 14px;
  font-family: var(--font-mono);
}

.email-form input::placeholder { color: var(--text-disabled); }

.email-form .btn {
  flex-shrink: 0;
}

.email-form--lg {
  max-width: 580px;
  margin-inline: auto;
}

.email-form__feedback {
  font-family: var(--font-mono);
  font-size: 12px;
  margin-top: 14px;
  min-height: 18px;
  letter-spacing: 0.02em;
  color: var(--text-disabled);
}
.email-form__feedback--success { color: var(--status-live); }
.email-form__feedback--error   { color: var(--status-error); }

/* ---------- Problem section ---------- */

.section--problem {
  background:
    linear-gradient(to bottom, var(--bg-base) 0%, var(--bg-surface) 100%);
  border-top: 1px solid var(--border-divider);
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 8px;
}

.problem-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 12px;
  padding: 28px;
  transition: border-color var(--t-std) var(--ease), transform var(--t-std) var(--ease), background var(--t-std) var(--ease);
}

.problem-card:hover {
  border-color: rgba(34,211,238,0.3);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.problem-card__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent-cyan);
  letter-spacing: 0.08em;
}

.problem-card__title {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 18px;
  color: var(--text-primary);
  margin: 14px 0 10px;
  letter-spacing: -0.01em;
}

.problem-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ---------- How it works ---------- */

.section--how {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-divider);
}

.flow {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 18px;
  margin: 8px 0 64px;
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 14px;
  flex-wrap: wrap;
}

.flow__node {
  flex: 1 1 200px;
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  padding: 20px 22px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border-card);
  border-radius: 10px;
  text-align: left;
}

.flow__node--primary {
  background: linear-gradient(135deg, rgba(37,99,235,0.18) 0%, rgba(34,211,238,0.10) 100%);
  border-color: rgba(34,211,238,0.4);
  box-shadow: 0 0 0 1px rgba(34,211,238,0.15), 0 0 32px rgba(34,211,238,0.18);
}

.flow__node-label {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 14px;
  color: var(--text-primary);
  letter-spacing: -0.005em;
}

.flow__node-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-disabled);
  letter-spacing: 0.02em;
}

.flow__arrow {
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--accent-cyan);
  flex-shrink: 0;
  min-width: 16px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.step {
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 12px;
  position: relative;
  transition: border-color var(--t-std) var(--ease), transform var(--t-std) var(--ease);
}

.step:hover {
  border-color: rgba(34,211,238,0.3);
  transform: translateY(-2px);
}

.step__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent-cyan);
  letter-spacing: 0.08em;
}

.step__title {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 18px;
  color: var(--text-primary);
  margin: 14px 0 10px;
  letter-spacing: -0.01em;
}

.step p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ---------- Features ---------- */

.section--features {
  background: var(--bg-base);
  border-top: 1px solid var(--border-divider);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 56px;
}

.feature-card {
  position: relative;
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 12px;
  transition: border-color var(--t-std) var(--ease), transform var(--t-std) var(--ease), background var(--t-std) var(--ease);
}

.feature-card:hover {
  border-color: rgba(34,211,238,0.35);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.feature-card__icon {
  display: inline-grid;
  place-items: center;
  width: 40px; height: 40px;
  border-radius: 10px;
  background: rgba(34,211,238,0.08);
  border: 1px solid rgba(34,211,238,0.25);
  color: var(--accent-cyan);
  font-size: 20px;
  margin-bottom: 18px;
}

.feature-card h3 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 18px;
  color: var(--text-primary);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ---------- Deployment strip ---------- */

.deployment-strip {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 32px;
  align-items: center;
  padding: 36px;
  background: linear-gradient(135deg, rgba(37,99,235,0.12) 0%, rgba(34,211,238,0.06) 100%);
  border: 1px solid rgba(34,211,238,0.25);
  border-radius: 14px;
  box-shadow: 0 0 0 1px rgba(34,211,238,0.08), 0 0 48px rgba(34,211,238,0.08);
}

.deployment-strip__text {
  font-size: 17px;
  line-height: 1.55;
  color: var(--text-secondary);
}

.deployment-strip__text strong {
  color: var(--text-primary);
  font-weight: 600;
}

.deployment-strip__metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.metric {
  text-align: left;
}

.metric__value {
  display: block;
  font-family: var(--font-mono);
  font-size: 32px;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 8px;
}

.metric__label {
  display: block;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-disabled);
}

/* ---------- Use cases ---------- */

.section--cases {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-divider);
}

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

.case {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 32px;
  align-items: start;
  padding: 28px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-left: 3px solid var(--accent-cyan);
  border-radius: 12px;
  transition: background var(--t-std) var(--ease), border-color var(--t-std) var(--ease);
}

.case:hover {
  background: var(--bg-card-hover);
  border-color: rgba(34,211,238,0.3);
  border-left-color: var(--accent-cyan);
}

.case__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  padding-top: 4px;
}

.case h3 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 19px;
  color: var(--text-primary);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.case p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ---------- Contact section ---------- */

.section--contact {
  background:
    radial-gradient(ellipse 60% 80% at 50% 0%, rgba(34,211,238,0.12) 0%, transparent 60%),
    radial-gradient(ellipse 50% 60% at 50% 100%, rgba(37,99,235,0.10) 0%, transparent 60%),
    var(--bg-base);
  border-top: 1px solid var(--border-divider);
  text-align: center;
}

.contact__inner {
  max-width: 720px;
}

.contact__lead {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0 auto 36px;
  max-width: 560px;
}

.contact__note {
  margin-top: 28px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-disabled);
  letter-spacing: 0.02em;
}

/* ---------- Footer ---------- */

.site-footer {
  padding: 56px 0 40px;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-divider);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 32px;
  align-items: start;
}

.site-footer__tag {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-disabled);
  margin-top: 12px;
  letter-spacing: 0.02em;
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 13px;
  color: var(--text-muted);
}

.site-footer__meta {
  text-align: right;
  font-size: 13px;
}

.site-footer__meta a {
  color: var(--accent-cyan);
  font-family: var(--font-mono);
}

.site-footer__copy {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-disabled);
  letter-spacing: 0.02em;
}

/* ---------- Responsive ---------- */

@media (max-width: 960px) {
  .section { padding: 72px 0; }
  .problem-grid,
  .steps { grid-template-columns: 1fr; gap: 16px; }
  .features-grid { grid-template-columns: 1fr; }
  .deployment-strip { grid-template-columns: 1fr; padding: 28px; }
  .deployment-strip__metrics { grid-template-columns: repeat(3, 1fr); }
  .case { grid-template-columns: 1fr; gap: 12px; }
  .case__tag { padding-top: 0; }
  .site-footer__inner { grid-template-columns: 1fr; }
  .site-footer__meta { text-align: left; }
  .flow { padding: 20px; }
  .flow__arrow { transform: rotate(90deg); padding: 4px 0; }
  .flow__node { flex: 1 1 100%; }
}

@media (max-width: 720px) {
  .nav-list { display: none; }
  .hero { padding: 64px 0 88px; }
  .hero__signals { gap: 14px; flex-direction: column; }
  .email-form { flex-direction: column; padding: 12px; }
  .email-form input { padding: 10px 12px; }
  .email-form .btn { width: 100%; }
  .deployment-strip__metrics { grid-template-columns: 1fr; }
  .site-header__inner { gap: 12px; }
}

@media (max-width: 480px) {
  :root { --container-pad: 18px; }
  .section { padding: 60px 0; }
  .section__title { font-size: 26px; }
  .hero__title { font-size: 34px; }
  .hero__sub { font-size: 16px; }
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}