:root {
      --bg: #09090b;
      --card: #18181b;
      --card-border: rgba(255, 255, 255, 0.08);
      --text: #fafafa;
      --muted: #a1a1aa;
      --accent: #14b8a6;
      --accent-hover: #0d9488;
      --input-bg: #27272a;
      --input-border: #3f3f46;
      --error-bg: rgba(239, 68, 68, 0.15);
      --error-text: #fca5a5;
      --error-border: rgba(239, 68, 68, 0.4);
    }
    body {
      margin: 0;
      min-height: 100vh;
      display: grid;
      place-items: center;
      font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      background: var(--bg);
      color: var(--text);
    }
    .card {
      width: min(420px, calc(100% - 32px));
      border-radius: 12px;
      border: 1px solid var(--card-border);
      background: var(--card);
      padding: 32px;
      box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    }
    .brand-row {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 24px;
    }
    .brand-mark {
      width: 40px;
      height: 40px;
      border-radius: 10px;
      display: grid;
      place-items: center;
      font-size: 13px;
      font-weight: 800;
      letter-spacing: 0.05em;
      color: #042f2e;
      background: var(--accent);
      box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.2);
    }
    h1 {
      margin: 0;
      font-size: 1.4rem;
      font-weight: 700;
      letter-spacing: -0.01em;
    }
    p {
      margin: 0 0 24px;
      color: var(--muted);
      font-size: 0.95rem;
      line-height: 1.5;
    }
    label {
      display: block;
      margin: 0 0 8px;
      font-size: 0.85rem;
      font-weight: 500;
      color: #d4d4d8;
    }
    .form-group {
      margin-bottom: 20px;
    }
    input {
      width: 100%;
      border-radius: 8px;
      border: 1px solid var(--input-border);
      background: var(--input-bg);
      color: var(--text);
      padding: 12px;
      font-size: 0.95rem;
      box-sizing: border-box;
      transition: border-color 0.2s, box-shadow 0.2s;
      outline: none;
    }
    input:focus {
      border-color: var(--accent);
      box-shadow: 0 0 0 2px rgba(20, 184, 166, 0.2);
    }
    button {
      width: 100%;
      border: 0;
      border-radius: 8px;
      padding: 12px;
      font-weight: 600;
      font-size: 0.95rem;
      cursor: pointer;
      color: #042f2e;
      background: var(--accent);
      transition: background 0.2s, transform 0.1s;
      margin-top: 8px;
    }
    button:hover {
      background: var(--accent-hover);
    }
    button:active {
      transform: scale(0.98);
    }
    .error {
      margin: 0 0 20px;
      padding: 12px;
      border-radius: 8px;
      border: 1px solid var(--error-border);
      background: var(--error-bg);
      color: var(--error-text);
      font-size: 0.9rem;
      display: flex;
      align-items: center;
      gap: 8px;
    }