*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    :root {
      --bg:         #050507;
      --surface:    #0d0d10;
      --surface2:   #13131a;
      --border:     rgba(255,255,255,0.07);
      --border2:    rgba(255,255,255,0.13);
      --violet:     #8B2BE2;
      --violet-dim: rgba(139,43,226,0.18);
      --violet-glow:rgba(139,43,226,0.40);
      --cyan:       #00D4FF;
      --cyan-dim:   rgba(0,212,255,0.12);
      --text:       #f0f0f4;
      --text-muted: rgba(255,255,255,0.45);
      --green:      #22c55e;
      --red:        #ef4444;
    }
    body {
      background: var(--bg);
      color: var(--text);
      font-family: 'Inter', sans-serif;
      min-height: 100vh;
    }
    body::before {
      content: '';
      position: fixed; inset: 0;
      background: repeating-linear-gradient(-45deg, transparent, transparent 40px,
        rgba(139,43,226,0.018) 40px, rgba(139,43,226,0.018) 41px);
      pointer-events: none; z-index: 0;
    }
    body::after {
      content: '';
      position: fixed; inset: 0;
      background: repeating-linear-gradient(0deg, transparent, transparent 3px,
        rgba(0,0,0,0.05) 3px, rgba(0,0,0,0.05) 4px);
      pointer-events: none; z-index: 0;
    }

    /* ─── Nav ──────────────────────────────────────────────────────── */
    nav {
      position: fixed; top: 0; left: 0; right: 0; z-index: 100;
      display: flex; align-items: center; justify-content: space-between;
      padding: 16px 32px;
      background: rgba(5,5,7,0.80); backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border2);
    }
    .nav-logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
    .nav-logo img { height: 28px; }
    .nav-logo-text {
      font-family: 'Syne', sans-serif; font-size: 18px; font-weight: 800;
      background: linear-gradient(135deg, var(--violet), var(--cyan));
      -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    }
    .nav-links { display: flex; align-items: center; gap: 24px; }
    .nav-link { color: var(--text-muted); text-decoration: none; font-size: 13px; transition: color .15s; }
    .nav-link:hover { color: var(--text); }

    /* ─── Layout ───────────────────────────────────────────────────── */
    .page { max-width: 960px; margin: 0 auto; padding: 0 20px; position: relative; z-index: 1; }

    /* ─── Hero ─────────────────────────────────────────────────────── */
    .hero {
      padding: 120px 0 60px;
      text-align: center;
    }
    .hero-badge {
      display: inline-flex; align-items: center; gap: 6px;
      padding: 6px 14px; border-radius: 20px;
      background: var(--violet-dim); border: 1px solid rgba(139,43,226,0.3);
      font-size: 11px; font-family: 'Space Mono', monospace;
      color: #c084fc; letter-spacing: 1px; margin-bottom: 24px;
    }
    .hero-title {
      font-family: 'Syne', sans-serif; font-size: clamp(36px, 6vw, 68px);
      font-weight: 800; line-height: 1.05; letter-spacing: -1.5px;
      margin-bottom: 18px;
    }
    .hero-title span {
      background: linear-gradient(135deg, var(--violet), var(--cyan));
      -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    }
    .hero-sub {
      font-size: 17px; color: var(--text-muted); line-height: 1.7;
      max-width: 560px; margin: 0 auto 36px;
    }
    .hero-price {
      display: inline-flex; align-items: baseline; gap: 6px;
      font-family: 'Space Mono', monospace;
    }
    .hero-price-usd { font-size: 42px; font-weight: 700; color: var(--text); }
    .hero-price-label { font-size: 13px; color: var(--text-muted); }
    .hero-price-ars { font-size: 14px; color: var(--cyan); margin-left: 4px; }

    /* ─── Features ─────────────────────────────────────────────────── */
    .features {
      display: grid; grid-template-columns: repeat(3, 1fr);
      gap: 16px; margin: 48px 0;
    }
    .feature-card {
      background: var(--surface);
      border: 1px solid var(--border2);
      border-radius: 18px; padding: 24px 20px;
    }
    .feature-icon { font-size: 32px; margin-bottom: 12px; }
    .feature-title { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
    .feature-desc { font-size: 13px; color: var(--text-muted); line-height: 1.65; }

    /* ─── Form section ─────────────────────────────────────────────── */
    .form-section { margin: 24px 0 80px; }
    .form-card {
      background: var(--surface);
      border: 1px solid var(--border2);
      border-radius: 24px; padding: 40px;
      max-width: 680px; margin: 0 auto;
    }
    .form-title {
      font-family: 'Syne', sans-serif; font-size: 24px; font-weight: 800;
      margin-bottom: 6px;
    }
    .form-sub { font-size: 13px; color: var(--text-muted); margin-bottom: 28px; }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
    .form-group { display: flex; flex-direction: column; gap: 6px; }
    .form-group.full { grid-column: 1 / -1; }
    .form-label {
      font-size: 11px; font-weight: 600; text-transform: uppercase;
      letter-spacing: 0.1em; color: var(--text-muted);
    }
    .form-input {
      padding: 11px 14px;
      background: var(--surface2); border: 1px solid var(--border2);
      border-radius: 10px; color: var(--text);
      font-family: 'Inter', sans-serif; font-size: 14px; outline: none;
      transition: border-color .18s, box-shadow .18s;
    }
    .form-input:focus {
      border-color: var(--violet);
      box-shadow: 0 0 0 3px var(--violet-dim);
    }
    .form-input::placeholder { color: var(--text-muted); }
    .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
    .btn-pay {
      width: 100%; margin-top: 24px; height: 58px; border-radius: 14px;
      border: none; cursor: pointer;
      background: linear-gradient(90deg, var(--violet), var(--cyan), var(--violet));
      background-size: 200% auto;
      color: #fff; font-family: 'Syne', sans-serif;
      font-size: 17px; font-weight: 800; letter-spacing: 0.3px;
      box-shadow: 0 0 28px var(--violet-glow);
      animation: shimmer 3s linear infinite;
      transition: transform .2s, box-shadow .2s;
      display: flex; align-items: center; justify-content: center; gap: 10px;
    }
    .btn-pay:hover:not(:disabled) {
      transform: translateY(-2px);
      box-shadow: 0 0 42px var(--violet-glow), 0 0 70px rgba(0,212,255,0.18);
    }
    .btn-pay:disabled { opacity: .5; cursor: not-allowed; animation: none; transform: none; }
    @keyframes shimmer { 0%{background-position:0% center} 100%{background-position:200% center} }
    .btn-secondary {
      width: 100%; margin-top: 10px; height: 46px; border-radius: 12px;
      border: 1px solid var(--border2); cursor: pointer;
      background: transparent; color: var(--text-muted);
      font-family: 'Inter', sans-serif; font-size: 14px;
      transition: all .18s;
    }
    .btn-secondary:hover { border-color: var(--violet); color: var(--text); }

    /* ─── Toast ────────────────────────────────────────────────────── */
    .toast {
      position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%);
      background: rgba(13,13,16,0.92); backdrop-filter: blur(16px);
      border: 1px solid var(--border); padding: 12px 26px; border-radius: 28px;
      font-size: 13px; font-family: 'Space Mono', monospace;
      box-shadow: 0 12px 40px rgba(0,0,0,0.6); z-index: 9998;
      transition: opacity .3s; opacity: 0; pointer-events: none; white-space: nowrap;
    }
    .toast.show { opacity: 1; }
    .toast.success { border-color: rgba(34,197,94,.45); color: var(--green); }
    .toast.error   { border-color: rgba(239,68,68,.45);  color: var(--red); }

    /* ─── Success screen ───────────────────────────────────────────── */
    #screen-success { display: none; }
    .success-card {
      background: var(--surface); border: 1px solid rgba(34,197,94,0.28);
      border-radius: 24px; padding: 40px; max-width: 600px; margin: 0 auto;
      text-align: center;
    }
    .success-icon { font-size: 60px; margin-bottom: 16px; }
    .success-title {
      font-family: 'Syne', sans-serif; font-size: 26px; font-weight: 800;
      margin-bottom: 8px;
    }
    .success-sub { font-size: 14px; color: var(--text-muted); line-height: 1.7; margin-bottom: 28px; }
    .link-box {
      background: var(--surface2); border: 1px solid var(--border2);
      border-radius: 12px; padding: 14px 18px;
      display: flex; align-items: center; justify-content: space-between;
      gap: 10px; margin-bottom: 14px;
    }
    .link-text {
      font-family: 'Space Mono', monospace; font-size: 12px;
      color: var(--cyan); word-break: break-all; text-align: left; flex: 1;
    }
    .btn-copy {
      padding: 7px 14px; border-radius: 8px; border: 1px solid rgba(139,43,226,0.4);
      background: var(--violet-dim); color: #c084fc;
      font-family: 'Inter', sans-serif; font-size: 12px; font-weight: 600;
      cursor: pointer; flex-shrink: 0; white-space: nowrap; transition: all .15s;
    }
    .btn-copy:hover { background: rgba(139,43,226,0.35); }
    .btn-wa {
      width: 100%; height: 52px; border-radius: 12px; border: none; cursor: pointer;
      background: #25D366; color: #fff;
      font-family: 'Syne', sans-serif; font-size: 16px; font-weight: 700;
      display: flex; align-items: center; justify-content: center; gap: 8px;
      transition: opacity .15s; margin-top: 4px;
    }
    .btn-wa:hover { opacity: .88; }
    .success-note {
      margin-top: 18px; font-size: 12px; color: var(--text-muted);
      font-family: 'Space Mono', monospace; line-height: 1.7;
    }

    /* ─── Verify pending ────────────────────────────────────────────── */
    #screen-verify { display: none; }
    .verify-card {
      background: var(--surface); border: 1px solid rgba(0,212,255,0.25);
      border-radius: 24px; padding: 36px 40px; max-width: 560px; margin: 0 auto;
      text-align: center;
    }
    .spinner {
      display: inline-block; width: 36px; height: 36px;
      border: 2px solid rgba(139,43,226,0.25);
      border-top-color: var(--violet); border-right-color: var(--cyan);
      border-radius: 50%; animation: spin .7s linear infinite; margin-bottom: 16px;
    }
    @keyframes spin { to { transform: rotate(360deg); } }

    /* ─── Responsive ────────────────────────────────────────────────── */
    @media (max-width: 700px) {
      nav { padding: 14px 18px; }
      .hero { padding: 90px 0 40px; }
      .features { grid-template-columns: 1fr; gap: 12px; }
      .form-card { padding: 24px 20px; }
      .form-grid { grid-template-columns: 1fr; }
      .form-row { grid-template-columns: 1fr; }
      .nav-links { display: none; }
    }