Login Neon

:root {
      --ink: #050607;
      --acid: #b8ff2e;
      --panel: rgba(12, 14, 18, 0.85);
      --line: rgba(255, 255, 255, 0.1);
      --muted: rgba(255, 255, 255, 0.45);
    }

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

    body {
      min-height: 100vh;
      display: grid;
      place-items: center;
      padding: 1.5rem;
      font-family: "Segoe UI", system-ui, sans-serif;
      color: #fff;
      background:
        radial-gradient(ellipse 60% 50% at 50% -10%, rgba(184, 255, 46, 0.18), transparent 55%),
        radial-gradient(ellipse 40% 40% at 100% 100%, rgba(80, 100, 255, 0.12), transparent 50%),
        var(--ink);
      overflow: hidden;
    }

    .noise {
      position: fixed;
      inset: 0;
      opacity: 0.04;
      pointer-events: none;
      background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    }

    .shell {
      width: min(100%, 400px);
      position: relative;
      z-index: 1;
    }

    .shell::before {
      content: "";
      position: absolute;
      inset: -2px;
      border-radius: 28px;
      background: linear-gradient(135deg, rgba(184, 255, 46, 0.55), transparent 40%, rgba(100, 160, 255, 0.4));
      z-index: -1;
      filter: blur(0.5px);
      animation: borderGlow 4s ease-in-out infinite alternate;
    }

    @keyframes borderGlow {
      from { opacity: 0.55; }
      to { opacity: 1; }
    }

    form {
      background: var(--panel);
      border: 1px solid var(--line);
      border-radius: 26px;
      padding: 2rem 1.75rem 1.75rem;
      backdrop-filter: blur(20px);
      box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55);
    }

    .head {
      text-align: center;
      margin-bottom: 1.75rem;
    }

    .logo {
      width: 48px;
      height: 48px;
      margin: 0 auto 1rem;
      border-radius: 14px;
      background: linear-gradient(145deg, var(--acid), #5aa80a);
      box-shadow: 0 0 30px rgba(184, 255, 46, 0.4);
      display: grid;
      place-items: center;
      font-weight: 900;
      color: #06100a;
    }

    h1 {
      font-size: 1.45rem;
      font-weight: 850;
      letter-spacing: -0.02em;
      margin-bottom: 0.35rem;
    }

    .head p {
      color: var(--muted);
      font-size: 0.9rem;
    }

    .field {
      position: relative;
      margin-bottom: 1.1rem;
    }

    .field input {
      width: 100%;
      padding: 1.15rem 1rem 0.55rem;
      border-radius: 14px;
      border: 1px solid var(--line);
      background: rgba(0, 0, 0, 0.35);
      color: #fff;
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    }

    .field label {
      position: absolute;
      left: 1rem;
      top: 50%;
      transform: translateY(-50%);
      color: var(--muted);
      font-size: 0.92rem;
      pointer-events: none;
      transition: transform 0.2s ease, font-size 0.2s ease, color 0.2s ease, top 0.2s ease;
    }

    .field input:focus,
    .field input:not(:placeholder-shown) {
      border-color: rgba(184, 255, 46, 0.55);
      box-shadow: 0 0 0 3px rgba(184, 255, 46, 0.12);
      background: rgba(0, 0, 0, 0.45);
    }

    .field input:focus + label,
    .field input:not(:placeholder-shown) + label {
      top: 0.55rem;
      transform: none;
      font-size: 0.68rem;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--acid);
    }

    .field input::placeholder { color: transparent; }

    .row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin: 0.25rem 0 1.35rem;
      font-size: 0.82rem;
    }

    .row label {
      display: flex;
      align-items: center;
      gap: 0.45rem;
      color: var(--muted);
      cursor: pointer;
    }

    .row a {
      color: var(--acid);
      text-decoration: none;
      font-weight: 650;
    }

    .row a:hover { text-decoration: underline; }

    .submit {
      width: 100%;
      padding: 0.95rem;
      border: none;
      border-radius: 14px;
      background: linear-gradient(135deg, var(--acid), #8fd418);
      color: #06100a;
      font-weight: 850;
      font-size: 0.98rem;
      cursor: pointer;
      box-shadow: 0 0 32px rgba(184, 255, 46, 0.3);
      transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
    }

    .submit:hover {
      transform: translateY(-2px);
      filter: brightness(1.05);
      box-shadow: 0 0 48px rgba(184, 255, 46, 0.45);
    }

    .submit:active { transform: scale(0.98); }

    .alt {
      text-align: center;
      margin-top: 1.25rem;
      font-size: 0.85rem;
      color: var(--muted);
    }

    .alt a {
      color: #fff;
      font-weight: 700;
      text-decoration: none;
    }