:root {
  --background: #f4f7fc;
  --surface: #ffffff;
  --surface-soft: #edf2fb;
  --text: #1f2a3d;
  --text-muted: #54627a;
  --border: #d7e1f0;
  --accent: #1a3a6b;
  --accent-soft: #dbe7fb;
  --accent-strong: #102748;
  --success: #1f8a4c;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Barlow", sans-serif;
  background:
    radial-gradient(circle at 12% 10%, #ffffff 0%, transparent 38%),
    radial-gradient(circle at 90% 6%, #dde9ff 0%, transparent 25%),
    linear-gradient(180deg, #f7faff 0%, var(--background) 100%);
  color: var(--text);
  line-height: 1.6;
}

nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem clamp(1rem, 5vw, 3rem);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: "Bebas Neue", sans-serif;
  letter-spacing: 0.1em;
  font-size: 1.5rem;
  text-decoration: none;
  color: var(--accent);
}

.nav-back {
  font-family: "DM Mono", monospace;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  text-decoration: none;
  color: var(--text-muted);
}

.nav-back:hover {
  color: var(--accent);
}

main {
  width: min(1120px, 94vw);
  margin: 0 auto;
}

.hero {
  text-align: center;
  padding: clamp(3rem, 7vw, 5rem) 0 2.5rem;
}

.hero-intro {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid #bfd2f5;
  border-radius: 999px;
  padding: 0.45rem 1rem;
  font-family: "DM Mono", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 1rem 0 0.5rem;
  font-family: "Bebas Neue", sans-serif;
  letter-spacing: 0.05em;
  font-size: clamp(3rem, 10vw, 5rem);
  color: var(--accent);
}

.hero p {
  max-width: 760px;
  margin: 0 auto;
  font-size: clamp(1.08rem, 2.8vw, 1.35rem);
  color: var(--text-muted);
}

.hero-actions {
  margin-top: 2rem;
  display: flex;
  justify-content: center;
  gap: 0.9rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  border-radius: 10px;
  border: 1px solid transparent;
  padding: 0.85rem 1.4rem;
  font-size: 1rem;
  font-weight: 600;
  transition:
    transform 0.16s ease,
    box-shadow 0.16s ease,
    background 0.2s ease;
}

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

.btn-primary {
  background: var(--accent);
  color: #ffffff;
  box-shadow: 0 8px 22px rgba(26, 58, 107, 0.2);
}

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

.btn-secondary {
  background: #ffffff;
  color: var(--accent);
  border-color: #bfd2f5;
}

.btn-secondary:hover {
  background: #f2f6ff;
}

.btn-full {
  width: 100%;
  margin-top: 1rem;
}

.hero-checks {
  margin: 2rem auto 0;
  max-width: 820px;
  display: grid;
  grid-template-columns: repeat(2, minmax(180px, 1fr));
  gap: 0.9rem;
  list-style: none;
  padding: 0;
}

.hero-checks li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.9rem 1rem;
  text-align: left;
  font-size: 1.02rem;
}

.hero-checks li::before {
  content: "✓";
  color: var(--success);
  font-weight: 700;
  margin-right: 0.55rem;
}

.section {
  padding: clamp(2.2rem, 6vw, 4.5rem) 0;
}

.section-alt {
  margin: 1rem 0;
  padding: clamp(2rem, 5vw, 4rem);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
}

.section-header {
  text-align: center;
  margin-bottom: 1.8rem;
}

.section-eyebrow {
  font-family: "DM Mono", monospace;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  color: var(--accent);
  margin: 0 0 0.4rem;
}

.section h2 {
  margin: 0 0 0.6rem;
  font-family: "Bebas Neue", sans-serif;
  letter-spacing: 0.05em;
  font-size: clamp(2.2rem, 6vw, 3.4rem);
  color: var(--accent);
}

.section-description {
  margin: 0 auto;
  max-width: 760px;
  font-size: 1.1rem;
  color: var(--text-muted);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}

.feature-card {
  background: var(--surface-soft);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.2rem;
}

.feature-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.3rem;
  color: var(--accent);
}

.feature-card p {
  margin: 0;
  font-size: 1.05rem;
  color: var(--text-muted);
}

.steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.9rem;
}

.steps li {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
}

.step-number {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent);
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 700;
  flex-shrink: 0;
}

.steps h3 {
  margin: 0;
  font-size: 1.2rem;
  color: var(--accent);
}

.steps p {
  margin: 0.25rem 0 0;
  font-size: 1.05rem;
  color: var(--text-muted);
}

.split {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 1.2rem;
  align-items: start;
}

.screenshot-frame {
  background: #eef4ff;
  border: 1px solid #c7d8f6;
  border-radius: 16px;
  padding: 0.8rem;
  min-height: 320px;
}

.screenshot-frame img {
  width: 100%;
  border-radius: 12px;
  display: block;
}

.screenshot-placeholder {
  height: 300px;
  border: 2px dashed #9eb9e8;
  border-radius: 12px;
  background: linear-gradient(145deg, #f8fbff, #e9f1ff);
  display: none;
  align-content: center;
  justify-items: center;
  text-align: center;
  padding: 1.2rem;
}

.screenshot-placeholder strong {
  font-size: 1.35rem;
  color: var(--accent);
}

.screenshot-placeholder p {
  margin: 0.6rem 0 0;
  max-width: 420px;
  color: var(--text-muted);
  font-size: 1rem;
}

.tech-card {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.1rem;
}

.tech-card h3 {
  margin: 0 0 0.8rem;
  font-size: 1.5rem;
  color: var(--accent);
}

.tech-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.tech-card li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid var(--border);
  padding: 0.65rem 0;
}

.tech-card li:last-child {
  border-bottom: 0;
}

.tech-card span {
  color: var(--text-muted);
}

.tech-card strong {
  color: var(--text);
  text-align: right;
}

footer {
  width: min(1120px, 94vw);
  margin: 0 auto;
  padding: 1rem 0 2.2rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 1rem;
}

@media (max-width: 900px) {
  .split {
    grid-template-columns: 1fr;
  }

  .tech-card strong {
    text-align: left;
  }
}

@media (max-width: 700px) {
  .hero-checks {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .steps li {
    align-items: center;
  }
}