@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

      :root {
        --primary: #1A56A0;
        --bg: #F0F4F8;
        --surface: #ffffff;
        --text: #12263f;
        --muted: #6b7b8f;
        --border: #d8e0ea;
        --error: #c62828;
        --shadow: 0 8px 24px rgba(16, 36, 62, 0.10);
      }

      * { box-sizing: border-box; }

      body {
        margin: 0;
        min-height: 100vh;
        font-family: Inter, 'Segoe UI', Tahoma, sans-serif;
        background: var(--bg);
        color: var(--text);
        display: grid;
        place-items: center;
        padding: 20px;
      }

      .shell {
        width: min(560px, 100%);
        background: linear-gradient(145deg, #123f76, var(--primary));
        border-radius: 8px;
        box-shadow: var(--shadow);
        border: 1px solid rgba(255,255,255,0.2);
        padding: 24px;
      }

      .hero h1 {
        margin: 0;
        font-size: 2rem;
        color: #eaf2fb;
      }

      .hero-badge {
        display: inline-block;
        margin-top: 14px;
        background: rgba(255,255,255,0.16);
        border: 1px solid rgba(255,255,255,0.26);
        color: #eaf2fb;
        padding: 6px 10px;
        border-radius: 999px;
        font-size: 0.78rem;
        font-weight: 600;
      }

      .panel {
        margin-top: 16px;
        background: var(--surface);
        border-radius: 8px;
        padding: 18px;
        border: 1px solid var(--border);
      }

      .panel h2 {
        margin: 0;
        font-size: 1.25rem;
      }

      .muted {
        margin: 6px 0 20px;
        color: var(--muted);
        font-size: 0.9rem;
      }

      .field {
        margin-bottom: 12px;
      }

      .field label {
        display: block;
        font-size: 0.82rem;
        font-weight: 600;
        color: #425466;
        margin-bottom: 6px;
      }

      .field input {
        width: 100%;
        border: 1px solid var(--border);
        border-radius: 8px;
        padding: 10px;
        font: inherit;
        background: #fff;
      }

      .field input:focus {
        outline: 2px solid rgba(26, 86, 160, 0.2);
        border-color: var(--primary);
      }

      .field-error {
        min-height: 16px;
        margin-top: 6px;
        font-size: 0.82rem;
        color: var(--error);
      }

      .btn {
        width: 100%;
        border: 0;
        border-radius: 8px;
        padding: 10px 12px;
        min-height: 42px;
        font-size: 1rem;
        line-height: 1.2;
        font-weight: 700;
        cursor: pointer;
        background: var(--primary);
        color: #fff;
      }

      .btn:hover { filter: brightness(1.05); }

      .toast {
        position: fixed;
        top: 16px;
        right: 16px;
        background: #8f1d1d;
        color: #fff;
        padding: 10px 12px;
        border-radius: 8px;
        box-shadow: var(--shadow);
        opacity: 0;
        pointer-events: none;
        transform: translateY(-8px);
        transition: all 0.2s ease;
        z-index: 80;
      }

      .toast.show {
        opacity: 1;
        transform: translateY(0);
      }