:root {
  --bg: #06080f;
  --bg-elevated: #0d111c;
  --surface: #141b2d;
  --border: rgba(255, 255, 255, 0.08);
  --text: #f0f2f8;
  --text-muted: #9aa3b8;
  --accent: #3b82f6;
  --accent-glow: rgba(59, 130, 246, 0.35);
  --accent-soft: #1e3a5f;
  --success: #14b8a6;
  --radius: 12px;
  --radius-lg: 20px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --max-width: 1180px;
}

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

html {
  scroll-behavior: smooth;
}

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

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

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
  background: rgba(6, 8, 15, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
}

.site-header::after {
  content: "";
  position: absolute;
  inset: auto 1.5rem 0;
  height: 1px;
  background: var(--border);
}

.logo {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.logo span {
  color: var(--accent);
  font-weight: 600;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.9rem;
}

.nav a:not(.nav-cta) {
  color: var(--text-muted);
  transition: color 0.2s;
}

.nav a:not(.nav-cta):hover {
  color: var(--text);
}

.nav-cta {
  padding: 0.45rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text);
  transition: border-color 0.2s, background 0.2s;
}

.nav-cta:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s, background 0.2s;
}

.btn-primary {
  background: linear-gradient(135deg, #2563eb, #3b82f6);
  color: #fff;
  box-shadow: 0 4px 24px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 32px var(--accent-glow);
}

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

.btn-ghost:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.04);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.05rem;
}

/* Hero */
.hero {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
  display: grid;
  gap: 3rem;
  align-items: center;
}

@media (min-width: 900px) {
  .hero {
    grid-template-columns: 1fr 1.1fr;
    padding-top: 4rem;
  }
}

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

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.hero h1 em {
  font-style: normal;
  background: linear-gradient(90deg, #60a5fa, #2dd4bf);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 32rem;
  margin-bottom: 1.75rem;
}

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

.hero-visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.03),
    0 24px 80px rgba(0, 0, 0, 0.5),
    0 0 120px var(--accent-glow);
}

.hero-visual img {
  width: 100%;
}

/* Features */
.features {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

.section-intro {
  text-align: center;
  max-width: 36rem;
  margin: 0 auto 3rem;
}

.section-intro h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.section-intro p {
  color: var(--text-muted);
}

.feature-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}

@media (min-width: 600px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .feature-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color 0.2s, transform 0.2s;
}

.feature-card:hover {
  border-color: rgba(59, 130, 246, 0.35);
  transform: translateY(-2px);
}

.feature-icon {
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 10px;
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* Platform */
.platform {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 900px) {
  .platform {
    grid-template-columns: 0.95fr 1.05fr;
    gap: 3rem;
  }
}

.platform-text h2 {
  font-size: clamp(1.5rem, 3vw, 1.85rem);
  font-weight: 700;
  margin-bottom: 1rem;
}

.platform-text > p {
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.platform-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.platform-list li {
  position: relative;
  padding-left: 1.5rem;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.platform-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
}

.platform-visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
  content-visibility: auto;
  contain-intrinsic-size: auto 500px;
}

/* Contact */
.contact {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

.contact-inner {
  max-width: 32rem;
  margin: 0 auto;
  text-align: center;
  padding: 3rem 2rem;
  background: linear-gradient(145deg, var(--accent-soft), var(--surface));
  border: 1px solid rgba(59, 130, 246, 0.25);
  border-radius: var(--radius-lg);
}

.contact-inner h2 {
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.contact-inner > p {
  color: var(--text-muted);
  margin-bottom: 1.75rem;
}

.contact-form {
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-field label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--text);
}

.form-field input,
.form-field textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--text);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-field input[aria-invalid="true"],
.form-field textarea[aria-invalid="true"] {
  border-color: #f87171;
}

.form-field textarea {
  resize: vertical;
  min-height: 7rem;
}

.field-error {
  margin-top: 0.35rem;
  font-size: 0.8rem;
  color: #f87171;
}

.contact-form .btn {
  width: 100%;
  margin-top: 0.25rem;
}

.contact-form .btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none;
}

.form-status {
  text-align: center;
  font-size: 0.9rem;
  margin-top: 0.25rem;
}

.form-status--success {
  color: var(--success);
}

.form-status--error {
  color: #f87171;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

@media (max-width: 599px) {
  .nav a:not(.nav-cta):nth-child(2) {
    display: none;
  }
}