:root {
      --bg: #090d16;
      --card: rgba(17, 24, 39, 0.78);
      --accent: #6366f1;
      --glow: rgba(99, 102, 241, 0.45);
      --ok: #10b981;
      --err: #f43f5e;
      --text: #f8fafc;
      --muted: #94a3b8;
    }

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

    body {
      min-height: 100vh;
      display: grid;
      place-items: center;
      padding: 1.25rem;
      font-family: 'Inter', system-ui, -apple-system, sans-serif;
      background: var(--bg);
      color: var(--text);
      overflow: hidden;
    }

    /* Animated Aurora Background Orbs */
    .orb {
      position: fixed;
      width: 320px;
      height: 320px;
      border-radius: 50%;
      filter: blur(85px);
      opacity: 0.55;
      z-index: 0;
      animation: float 9s ease-in-out infinite alternate;
    }
    .orb-1 { background: #6366f1; top: -80px; left: -80px; }
    .orb-2 { background: #ec4899; bottom: -80px; right: -60px; animation-delay: -4.5s; }

    @keyframes float {
      to { transform: translate(35px, 25px) scale(1.12); }
    }

    /* Frosted Glass Card */
    .card {
      position: relative;
      z-index: 1;
      width: 100%;
      max-width: 400px;
      background: var(--card);
      backdrop-filter: blur(24px);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: 26px;
      padding: 2.2rem 1.75rem;
      text-align: center;
      transition: border-color 0.3s, box-shadow 0.3s;
    }
    .card.shake {
      animation: shake 0.42s ease;
      border-color: var(--err);
    }
    .card.verified {
      border-color: var(--ok);
    }

    @keyframes shake {
      20%, 60% { transform: translateX(-8px); }
      40%, 80% { transform: translateX(8px); }
    }

    /* Animated Status Badge */
    .badge {
      width: 64px;
      height: 64px;
      margin: 0 auto 1.15rem;
      border-radius: 18px;
      display: grid;
      place-items: center;
      background: rgba(99, 102, 241, 0.16);
      border: 1px solid rgba(99, 102, 241, 0.4);
      font-size: 1.65rem;
      transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    }
    .card.verified .badge {
      background: rgba(16, 185, 129, 0.2);
      border-color: var(--ok);
    }
    .card.shake .badge {
      background: rgba(244, 63, 94, 0.2);
      border-color: var(--err);
    }

    h1 { font-size: 1.4rem; font-weight: 700; margin-bottom: 0.4rem; }
    p { font-size: 0.86rem; color: var(--muted); line-height: 1.5; margin-bottom: 1.1rem; }

    /* Demo Pill */
    .demo {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      background: rgba(255, 255, 255, 0.05);
      border: 1px dashed rgba(255, 255, 255, 0.16);
      border-radius: 99px;
      padding: 0.3rem 0.45rem 0.3rem 0.8rem;
      font-size: 0.78rem;
      color: var(--muted);
      margin-bottom: 1.4rem;
    }
    .demo b { color: #a5b4fc; letter-spacing: 0.1em; font-family: monospace; font-size: 0.85rem; }
    .demo button {
      background: rgba(99, 102, 241, 0.25);
      color: #e0e7ff;
      border: none;
      border-radius: 99px;
      padding: 0.22rem 0.6rem;
      font-size: 0.72rem;
      font-weight: 600;
      cursor: pointer;
    }
    .demo button:hover { background: var(--accent); }

    /* 6-Digit Input Grid */
    .otp-grid {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 0.5rem;
      margin-bottom: 1rem;
    }
    .otp-grid input {
      width: 100%;
      height: 54px;
      border-radius: 13px;
      border: 1.5px solid rgba(255, 255, 255, 0.12);
      background: rgba(15, 23, 42, 0.65);
      color: var(--text);
      font-size: 1.3rem;
      font-weight: 700;
      text-align: center;
      outline: none;
      transition: all 0.22s cubic-bezier(0.34, 1.56, 0.64, 1);
    }
    .otp-grid input:focus {
      border-color: var(--accent);
      transform: translateY(-4px) scale(1.05);
    }
    .otp-grid input.filled {
      border-color: rgba(129, 140, 248, 0.55);
      background: rgba(99, 102, 241, 0.14);
      animation: pop 0.22s ease;
    }
    .card.verified .otp-grid input { border-color: var(--ok); color: #6ee7b7; }
    .card.shake .otp-grid input { border-color: var(--err); color: #fda4af; }

    @keyframes pop {
      50% { transform: scale(1.12); }
    }

    .msg { min-height: 1.25rem; font-size: 0.82rem; font-weight: 500; margin-bottom: 1rem; }
    .msg.ok { color: #34d399; }
    .msg.err { color: #fb7185; }

    .btn {
      width: 100%;
      padding: 0.88rem;
      border: none;
      border-radius: 13px;
      background: linear-gradient(135deg, #6366f1, #8b5cf6);
      color: #fff;
      font-size: 0.95rem;
      font-weight: 600;
      cursor: pointer;
      transition: transform 0.2s, opacity 0.2s;
    }
    .btn:hover:not(:disabled) { transform: translateY(-2px); }
    .btn:disabled { opacity: 0.45; cursor: not-allowed; box-shadow: none; }
    .card.verified .btn { background: linear-gradient(135deg, #10b981, #059669); }

    .resend { margin-top: 1.25rem; font-size: 0.8rem; color: var(--muted); }
    .resend button {
      background: none;
      border: none;
      color: #818cf8;
      font-weight: 600;
      cursor: pointer;
    }
    .resend button:disabled { color: #64748b; cursor: default; }