:root {
  --color-bg: #0f172a;
  --color-bg-alt: #111827;
  --color-surface: #1e293b;
  --color-primary: #6366f1;
  --color-primary-hover: #818cf8;
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --max-width: 1100px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: var(--color-bg-alt);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  padding-bottom: 18px;
}

.logo {
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.02em;
}

.nav {
  display: flex;
  gap: 28px;
}

.nav a {
  color: var(--color-text-muted);
  font-size: 15px;
}

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

.lang-switch {
  display: flex;
  gap: 10px;
  font-size: 13px;
}

.lang-switch a {
  color: var(--color-text-muted);
  padding: 4px 8px;
  border-radius: 6px;
}

.lang-switch a.active,
.lang-switch a:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.06);
}

/* Hero */
.hero {
  padding: 96px 0 80px;
  text-align: center;
}

.hero-inner {
  max-width: 720px;
}

.hero h1 {
  font-size: 44px;
  line-height: 1.15;
  margin: 0 0 20px;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--color-text-muted);
  margin: 0 0 36px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
}

.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 15px;
}

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

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

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.btn-secondary:hover {
  border-color: rgba(255, 255, 255, 0.32);
}

/* Features */
.features {
  padding: 64px 0;
  background: var(--color-bg-alt);
}

.features h2 {
  text-align: center;
  font-size: 30px;
  margin: 0 0 48px;
  letter-spacing: -0.02em;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 14px;
  padding: 28px;
}

.feature-icon {
  font-size: 28px;
  margin-bottom: 12px;
}

.feature-card h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.feature-card p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 15px;
}

/* How it works */
.how-it-works {
  padding: 64px 0;
}

.how-it-works h2 {
  text-align: center;
  font-size: 30px;
  margin: 0 0 48px;
  letter-spacing: -0.02em;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.step-card {
  text-align: center;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  margin-bottom: 16px;
}

.step-card h3 {
  margin: 0 0 8px;
  font-size: 17px;
}

.step-card p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 14px;
}

/* Pricing */
.pricing {
  padding: 72px 0;
  text-align: center;
  background: var(--color-bg-alt);
}

.pricing h2 {
  font-size: 30px;
  margin: 0 0 14px;
  letter-spacing: -0.02em;
}

.pricing p {
  max-width: 560px;
  margin: 0 auto 28px;
  color: var(--color-text-muted);
}

/* FAQ */
.faq {
  padding: 72px 0;
}

.faq h2 {
  text-align: center;
  font-size: 30px;
  margin: 0 0 40px;
  letter-spacing: -0.02em;
}

.faq-list {
  max-width: 680px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  padding: 18px 22px;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  float: right;
  color: var(--color-text-muted);
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item p {
  margin: 14px 0 0;
  color: var(--color-text-muted);
  font-size: 15px;
}

/* Final CTA */
.final-cta {
  padding: 80px 0;
  text-align: center;
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
}

.final-cta h2 {
  font-size: 30px;
  margin: 0 0 14px;
  letter-spacing: -0.02em;
}

.final-cta p {
  max-width: 520px;
  margin: 0 auto 28px;
  color: var(--color-text-muted);
}

/* CTA */
.cta {
  padding: 88px 0;
  text-align: center;
}

.cta h2 {
  font-size: 32px;
  margin: 0 0 14px;
  letter-spacing: -0.02em;
}

.cta p {
  color: var(--color-text-muted);
  margin: 0 0 32px;
}

.lead-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 420px;
  margin: 0 auto;
}

.lead-form input,
.lead-form textarea {
  width: 100%;
  padding: 12px 16px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: var(--color-surface);
  color: var(--color-text);
  font: inherit;
  resize: vertical;
}

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

.lead-form input:focus,
.lead-form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

.lead-form .btn {
  border: none;
  cursor: pointer;
}

.form-message {
  max-width: 420px;
  margin: 0 auto 20px;
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 14px;
}

.form-message-success {
  background: rgba(34, 197, 94, 0.12);
  color: #4ade80;
}

.form-message-error {
  background: rgba(239, 68, 68, 0.12);
  color: #f87171;
}

/* Footer */
.site-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: var(--color-bg-alt);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px;
  font-size: 14px;
  color: var(--color-text-muted);
}

@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
    gap: 12px;
  }

  .nav {
    order: 3;
    width: 100%;
    justify-content: center;
  }

  .hero h1 {
    font-size: 32px;
  }

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

  .features-grid {
    grid-template-columns: 1fr;
  }

  .steps-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}