:root {
        --bg: #edf0f5;
        --card-bg: #ffffff;
        --text-main: #0f172a;
        --text-muted: #6b7280;
        --accent: #111827;
        --accent-soft: #111827;
        --btn-primary: #020617;
        --btn-primary-hover: #000000;
        --btn-secondary: #e5e7eb;
        --border-subtle: #e5e7eb;
      }

      * {
        box-sizing: border-box;
      }

      body {
        margin: 0;
        font-family: system-ui, -apple-system, BlinkMacSystemFont,
          "SF Pro Text", "Segoe UI", sans-serif;
        background: var(--bg);
        color: var(--text-main);
      }

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

      .page {
        min-height: 100vh;
        display: flex;
        flex-direction: column;
      }

      .nav {
        height: 64px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0 24px;
        background: rgba(237, 240, 245, 0.9);
        backdrop-filter: blur(10px);
        position: sticky;
        top: 0;
        z-index: 10;
      }

      .nav-left {
        display: flex;
        align-items: center;
        gap: 8px;
        font-weight: 600;
      }

      .nav-icon {
        width: 26px;
        height: 26px;
        border-radius: 8px;
        
        display: flex;
        align-items: center;
        justify-content: center;
        color: #f9fafb;
        font-size: 16px;
      }

      .nav-right a {
        font-size: 13px;
        color: #4b5563;
      }

      .section {
        padding: 40px 20px;
      }

      .container {
        max-width: 1040px;
        margin: 0 auto;
      }

      /* hero */

      .hero {
        padding-top: 48px;
        padding-bottom: 56px;
      }

      .hero-inner {
        max-width: 720px;
        margin: 0 auto;
        text-align: center;
      }

      .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 6px 13px;
        border-radius: 999px;
        background: #ffffff;
        border: 1px solid #e5e7eb;
        font-size: 11px;
        text-transform: none;
        color: #4b5563;
        margin-bottom: 18px;
      }

      .hero-badge span:first-child {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 16px;
        height: 16px;
        border-radius: 999px;
        background: #16a34a;
        color: #f9fafb;
        font-size: 11px;
      }

      .hero-title {
        font-size: clamp(32px, 4vw, 44px);
        font-weight: 800;
        letter-spacing: 0.03em;
        margin: 0 0 14px;
      }

      .hero-title span {
        display: block;
      }

      .hero-subtitle {
        margin: 0 auto 26px;
        max-width: 560px;
        font-size: 15px;
        line-height: 1.6;
        color: var(--text-muted);
      }

      .hero-cta {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 12px;
      }

      .hero-buttons {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        justify-content: center;
      }

      .btn {
        border-radius: 999px;
        padding: 11px 24px;
        font-size: 14px;
        font-weight: 600;
        border: 1px solid transparent;
        cursor: pointer;
        transition: background 0.12s ease, transform 0.08s ease,
          box-shadow 0.12s ease;
        font-family: inherit;
      }

      .btn-primary {
        background: var(--btn-primary);
        color: #f9fafb;
        border-color: #020617;
        box-shadow: 0 14px 28px rgba(15, 23, 42, 0.45);
      }

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

      .btn-secondary {
        background: #f9fafb;
        color: #111827;
        border-color: #d1d5db;
        box-shadow: 0 8px 22px rgba(148, 163, 184, 0.5);
      }

      .btn-secondary:hover {
        background: #e5e7eb;
        transform: translateY(-1px);
      }

      .hero-hint {
        font-size: 12px;
        color: #9ca3af;
      }

      /* features grid */

      .section-title {
        text-align: center;
        font-size: 22px;
        font-weight: 700;
        margin-bottom: 24px;
      }

      .features-grid {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 18px;
      }

      .feature-card {
        background: #f8fafc;
        border-radius: 12px;
        border: 1px solid #e5e7eb;
        padding: 18px 18px 16px;
        display: flex;
        gap: 12px;
      }

      .feature-icon {
        width: 42px;
        height: 42px;
        border-radius: 11px;
        background: #111827;
        display: flex;
        align-items: center;
        justify-content: center;
        color: #f9fafb;
        font-size: 20px;
      }

      .feature-title {
        font-size: 15px;
        font-weight: 600;
        margin-bottom: 6px;
      }

      .feature-text {
        font-size: 13px;
        color: var(--text-muted);
        line-height: 1.5;
      }

      /* how it works */

      .steps {
        display: flex;
        flex-wrap: wrap;
        gap: 24px;
        justify-content: center;
      }

      .step-card {
        flex: 1 1 220px;
        max-width: 260px;
        background: #f8fafc;
        border-radius: 16px;
        border: 1px solid #e5e7eb;
        padding: 20px 18px;
        text-align: center;
      }

      .step-number {
        width: 40px;
        height: 40px;
        border-radius: 12px;
        background: #111827;
        color: #f9fafb;
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: 700;
        margin: 0 auto 12px;
      }

      .step-title {
        font-weight: 600;
        margin-bottom: 6px;
      }

      .step-text {
        font-size: 13px;
        color: var(--text-muted);
      }

      /* early access form */

      .cta-card {
        max-width: 640px;
        margin: 0 auto;
        background: #f9fafb;
        border-radius: 18px;
        border: 1px solid #e5e7eb;
        padding: 20px 22px;
        box-shadow: 0 10px 30px rgba(15, 23, 42, 0.18);
      }

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

      .cta-card p {
        margin: 0 0 14px;
        font-size: 13px;
        color: var(--text-muted);
      }

      .cta-form {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
      }

      .cta-form input[type="email"] {
        flex: 1 1 220px;
        padding: 10px 12px;
        border-radius: 999px;
        border: 1px solid #d1d5db;
        font-size: 14px;
        font-family: inherit;
      }

      .cta-form input[type="email"]:focus {
        outline: none;
        border-color: #2563eb;
        box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.4);
      }

      .cta-footnote {
        margin-top: 8px;
        font-size: 11px;
        color: #9ca3af;
      }

      .subscribe-forms{
        display: flex;
        justify-content: center;
        padding: 2em;
      }

      .responsive-video {
  max-width: 100%;
  width: 100%;
  height: auto;
  display: block;
  padding-bottom: 2em;
}


      /* footer */

      .footer {
        padding: 18px 20px 24px;
        text-align: center;
        font-size: 13px;
        color: #4b5563;
        border-top: 1px solid rgba(209, 213, 219, 0.6);
        margin-top: auto;
      }

      .footer span.heart {
        color: #ef4444;
      }

      @media (max-width: 768px) {
        .features-grid {
          grid-template-columns: 1fr;
        }
      }