:root {
  color-scheme: dark;
  --bg: #111318;
  --panel: #1b1d25;
  --panel-2: #23252e;
  --text: #f2f0f7;
  --muted: #aaa5b7;
  --soft: #777284;
  --line: rgba(255, 255, 255, 0.1);
  --violet: #7c3aed;
  --violet-light: #a78bfa;
  --blue: #38bdf8;
  --green: #34d399;
  --amber: #fbbf24;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 78% 20%, rgba(56, 189, 248, 0.11), transparent 28rem),
    radial-gradient(circle at 12% 42%, rgba(52, 211, 153, 0.08), transparent 24rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 1rem clamp(1rem, 4vw, 3rem);
  border-bottom: 1px solid var(--line);
  background: rgba(17, 19, 24, 0.86);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border-radius: 0.55rem;
  background: linear-gradient(135deg, var(--violet), var(--blue));
}

.nav {
  display: flex;
  gap: 1.2rem;
  color: var(--muted);
  font-size: 0.95rem;
  margin-left: auto;
}

.nav a:hover,
.header-action:hover,
.footer a:hover {
  color: var(--text);
}

.header-action {
  color: var(--violet-light);
  font-weight: 700;
}

.hero {
  min-height: calc(100vh - 4.1rem);
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(20rem, 0.95fr);
  align-items: center;
  gap: clamp(2rem, 5vw, 5rem);
  padding: clamp(2rem, 7vw, 5.5rem) clamp(1rem, 6vw, 5rem) 4rem;
}

.hero-media {
  min-height: 30rem;
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.hero-media img {
  width: min(21rem, 68vw);
  filter: drop-shadow(0 2rem 4rem rgba(124, 58, 237, 0.42));
  opacity: 0.95;
}

.bill-stack,
.month-card,
.alert-preview,
.feature-card {
  border: 1px solid var(--line);
  background: rgba(27, 29, 37, 0.86);
  box-shadow: 0 1.5rem 4rem rgba(0, 0, 0, 0.24);
  backdrop-filter: blur(16px);
}

.bill-stack {
  position: absolute;
  left: 0;
  bottom: 2.5rem;
  width: min(20rem, 72vw);
  border-radius: 0.5rem;
  padding: 0.7rem;
}

.bill-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem 0.9rem;
  color: var(--muted);
  border-radius: 0.45rem;
}

.bill-row + .bill-row {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.bill-row strong {
  color: var(--text);
}

.month-card {
  position: absolute;
  right: 0.5rem;
  top: 3rem;
  border-radius: 0.5rem;
  padding: 1rem 1.1rem;
}

.month-card span,
.alert-preview span {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
  margin-bottom: 0.25rem;
}

.month-card strong {
  color: var(--green);
  font-size: 1.35rem;
}

.hero-copy {
  max-width: 43rem;
}

.eyebrow {
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  margin: 0 0 0.9rem;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  font-size: clamp(4.5rem, 13vw, 10rem);
  line-height: 0.88;
  margin-bottom: 1.25rem;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.6rem);
  line-height: 1.02;
  margin-bottom: 1rem;
}

h3 {
  font-size: 1.04rem;
  margin-bottom: 0.55rem;
}

.lead {
  color: var(--muted);
  font-size: clamp(1.08rem, 2vw, 1.35rem);
  line-height: 1.6;
  max-width: 38rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.85rem 1.1rem;
  border-radius: 0.55rem;
  font-weight: 800;
}

.primary {
  background: var(--violet);
}

.primary:hover {
  background: #8b5cf6;
}

.secondary {
  border: 1px solid var(--line);
  color: var(--muted);
}

.secondary:hover {
  border-color: rgba(255, 255, 255, 0.22);
  color: var(--text);
}

.stats-band {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin: 0 clamp(1rem, 6vw, 5rem);
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  overflow: hidden;
  background: var(--line);
}

.stats-band div {
  background: rgba(27, 29, 37, 0.8);
  padding: 1.2rem;
}

.stats-band strong,
.stats-band span {
  display: block;
}

.stats-band span {
  color: var(--muted);
  margin-top: 0.35rem;
}

.section,
.split-section,
.alert-section {
  padding: clamp(4rem, 8vw, 7rem) clamp(1rem, 6vw, 5rem);
}

.section-heading {
  max-width: 46rem;
  margin-bottom: 2rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.feature-card {
  border-radius: 0.5rem;
  padding: 1.35rem;
}

.feature-card p,
.split-section p,
.alert-copy p {
  color: var(--muted);
  line-height: 1.65;
}

.feature-icon {
  display: block;
  width: 2rem;
  height: 0.35rem;
  border-radius: 999px;
  margin-bottom: 1.4rem;
}

.blue {
  background: var(--blue);
}

.green {
  background: var(--green);
}

.amber {
  background: var(--amber);
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(18rem, 1fr);
  gap: clamp(2rem, 5vw, 5rem);
  background: #161920;
}

.steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1rem;
}

.steps li {
  display: grid;
  grid-template-columns: 3.2rem 1fr;
  gap: 1rem;
  padding: 1.15rem;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  background: rgba(255, 255, 255, 0.035);
}

.steps span {
  color: var(--blue);
  font-weight: 900;
}

.alert-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 24rem);
  align-items: center;
  gap: clamp(2rem, 6vw, 6rem);
}

.alert-preview {
  position: relative;
  border-radius: 0.5rem;
  padding: 1.4rem;
}

.alert-preview strong {
  display: block;
  font-size: 1.3rem;
  line-height: 1.25;
}

.alert-preview a {
  display: inline-flex;
  margin-top: 1.3rem;
  color: var(--violet-light);
  font-weight: 800;
}

.alert-dot {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 999px;
  background: var(--amber);
  box-shadow: 0 0 0 0.5rem rgba(251, 191, 36, 0.12);
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem clamp(1rem, 6vw, 5rem);
  color: var(--soft);
  border-top: 1px solid var(--line);
}

@media (max-width: 860px) {
  .nav {
    display: none;
  }

  .site-header {
    gap: 1rem;
  }

  .header-action {
    margin-left: auto;
  }

  .hero,
  .split-section,
  .alert-section {
    grid-template-columns: 1fr;
  }

  .hero {
    justify-items: center;
    text-align: center;
  }

  .hero-media {
    order: 2;
    width: 100%;
    max-width: 32rem;
    min-height: 23rem;
  }

  .hero-copy {
    order: 1;
    width: 100%;
    max-width: 44rem;
  }

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

  .hero-actions {
    justify-content: center;
  }

  .stats-band,
  .feature-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: clamp(3.4rem, 15vw, 6rem);
  }
}

@media (max-width: 520px) {
  .brand span:last-child {
    display: none;
  }

  .hero {
    padding: 2rem 1.25rem 3.5rem;
  }

  .eyebrow {
    font-size: 0.72rem;
  }

  h1 {
    font-size: clamp(3.35rem, 16vw, 4.6rem);
  }

  .lead {
    font-size: 1.02rem;
  }

  .bill-stack {
    left: 50%;
    transform: translateX(-50%);
    width: min(100%, 22rem);
    bottom: 1rem;
  }

  .month-card {
    right: 50%;
    transform: translateX(68%);
    top: 1rem;
  }

  .hero-actions .button {
    width: 100%;
  }
}