Glass login

<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <title>Glass login</title>
    <link rel="stylesheet" href="style.css" />
  </head>
  <body>
    <div class="aura" aria-hidden="true">
      <span class="blob"></span>
      <span class="blob"></span>
      <span class="blob"></span>
    </div>

    <main class="scene">
      <form class="card" novalidate>
        <div class="sheen" aria-hidden="true"></div>
        <h1>Welcome back</h1>
        <p class="sub">Sign in to pick up where you left off.</p>

        <label class="field">
          <span>Email</span>
          <input type="email" name="email" autocomplete="email" placeholder="you@studio.com" />
        </label>

        <label class="field">
          <span>Password</span>
          <span class="password">
            <input type="password" name="password" autocomplete="current-password" placeholder="Your password" />
            <button class="peek" type="button" aria-label="Show password">
              <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.6" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
                <path d="M2 12s3.5-7 10-7 10 7 10 7-3.5 7-10 7S2 12 2 12Z" />
                <circle cx="12" cy="12" r="3" />
              </svg>
            </button>
          </span>
        </label>

        <button class="submit" type="submit"><span class="label">Sign in</span></button>

        <div class="or"><span>or</span></div>
        <button class="ghost" type="button">Continue with Google</button>

        <p class="alt">New here? <a href="#">Make an account</a></p>
      </form>
    </main>

    <script src="script.js"></script>
  </body>
</html>

:root {
  --ground: #f4f0ea;
  --ink: #1d1b24;
  --muted: rgba(29, 27, 36, 0.58);
  --lilac: #b9a0ff;
  --sky: #8ccdff;
  --peach: #ffb892;
  --ring: rgba(150, 125, 255, 0.28);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100dvh;
  display: grid;
  place-items: center;
  overflow: hidden;
  background: var(--ground);
  color: var(--ink);
  font: 15px/1.45 ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* Three soft blobs behind the glass. script.js moves them. */
.aura { position: fixed; inset: 0; pointer-events: none; }
.blob {
  position: absolute;
  left: 0;
  top: 0;
  width: 42vmax;
  aspect-ratio: 1;
  border-radius: 50%;
  filter: blur(56px);
  opacity: 0.8;
  will-change: transform;
}
.blob:nth-child(1) { background: var(--lilac); }
.blob:nth-child(2) { background: var(--sky); width: 36vmax; }
.blob:nth-child(3) { background: var(--peach); width: 30vmax; }

.scene { position: relative; padding: 24px; perspective: 900px; }

.card {
  position: relative;
  width: min(380px, calc(100vw - 48px));
  padding: 36px 32px 28px;
  border-radius: 28px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.36);
  border: 1px solid rgba(255, 255, 255, 0.65);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.8),
    0 40px 80px -36px rgba(50, 35, 90, 0.38);
  -webkit-backdrop-filter: blur(26px) saturate(1.4);
  backdrop-filter: blur(26px) saturate(1.4);
  transform: rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
}

/* A soft light that follows the pointer across the glass. */
.sheen {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(260px circle at var(--mx, 50%) var(--my, 0%), rgba(255, 255, 255, 0.7), transparent 65%);
  opacity: var(--glow, 0.4);
  transition: opacity 0.5s ease;
}

h1 { position: relative; margin: 0; font-size: 26px; font-weight: 500; letter-spacing: -0.02em; }
.sub { position: relative; margin: 6px 0 24px; color: var(--muted); }

.field { position: relative; display: grid; gap: 6px; margin-bottom: 14px; font-size: 13px; color: var(--muted); }
.field input {
  width: 100%;
  height: 46px;
  padding: 0 16px;
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.5);
  color: var(--ink);
  font: inherit;
  font-size: 15px;
  outline: none;
  transition: background 0.2s ease, box-shadow 0.2s ease;
}
.field input::placeholder { color: rgba(29, 27, 36, 0.35); }
.field input:focus { background: rgba(255, 255, 255, 0.85); box-shadow: 0 0 0 4px var(--ring); }

.password { position: relative; display: block; }
.password input { padding-right: 48px; }
.peek {
  position: absolute;
  right: 6px;
  top: 50%;
  width: 36px;
  height: 36px;
  margin-top: -18px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 10px;
  background: none;
  color: var(--muted);
  cursor: pointer;
}
.peek:hover, .peek[aria-pressed="true"] { color: var(--ink); background: rgba(255, 255, 255, 0.6); }

.submit, .ghost {
  position: relative;
  width: 100%;
  height: 48px;
  border-radius: 999px;
  font: inherit;
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.25s cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 0.25s ease, background 0.25s ease;
}
.submit {
  margin-top: 8px;
  border: 0;
  background: var(--ink);
  color: #fff;
  box-shadow: 0 12px 24px -12px rgba(29, 27, 36, 0.6);
}
.submit:hover { transform: translateY(-1px); box-shadow: 0 16px 30px -12px rgba(29, 27, 36, 0.6); }
.submit:active { transform: translateY(1px) scale(0.99); }
.submit.is-loading .label::after { content: ""; display: inline-block; width: 1.2em; text-align: left; animation: dots 1s steps(4) infinite; }
.submit.is-done { background: #2e8f63; }

@keyframes dots {
  0% { content: ""; }
  25% { content: "."; }
  50% { content: ".."; }
  75% { content: "..."; }
}

.or { position: relative; display: flex; align-items: center; gap: 12px; margin: 18px 0; color: var(--muted); font-size: 13px; }
.or::before, .or::after { content: ""; flex: 1; height: 1px; background: rgba(29, 27, 36, 0.12); }

.ghost { border: 1px solid rgba(255, 255, 255, 0.8); background: rgba(255, 255, 255, 0.45); color: var(--ink); }
.ghost:hover { background: rgba(255, 255, 255, 0.75); }

.alt { position: relative; margin: 20px 0 0; text-align: center; color: var(--muted); font-size: 13px; }
.alt a { color: var(--ink); text-underline-offset: 3px; }

@media (prefers-reduced-motion: reduce) {
  .card { transform: none; }
}

// Glass login: the blobs drift and lean toward your pointer,
// and the card tilts a little and catches the light.

const card = document.querySelector(".card");
const blobs = [...document.querySelectorAll(".blob")];
const still = matchMedia("(prefers-reduced-motion: reduce)").matches;

// Where each blob circles (as a share of the screen) and how hard it follows you.
const orbits = [
  { x: 0.3, y: 0.32, r: 0.1, speed: 0.00012, pull: 0.35 },
  { x: 0.72, y: 0.4, r: 0.12, speed: 0.0001, pull: -0.25 },
  { x: 0.5, y: 0.75, r: 0.08, speed: 0.00016, pull: 0.5 },
];

const pointer = { x: innerWidth / 2, y: innerHeight / 2, over: false };
const eased = { x: pointer.x, y: pointer.y };

addEventListener("pointermove", (event) => {
  pointer.x = event.clientX;
  pointer.y = event.clientY;
});
card.addEventListener("pointerenter", () => (pointer.over = true));
card.addEventListener("pointerleave", () => (pointer.over = false));

function frame(time) {
  eased.x += (pointer.x - eased.x) * 0.06;
  eased.y += (pointer.y - eased.y) * 0.06;
  const nx = eased.x / innerWidth - 0.5;
  const ny = eased.y / innerHeight - 0.5;

  blobs.forEach((blob, i) => {
    const o = orbits[i];
    const t = still ? 0 : time * o.speed + i * 2;
    const x = (o.x + Math.cos(t) * o.r + nx * o.pull) * innerWidth;
    const y = (o.y + Math.sin(t * 1.3) * o.r + ny * o.pull) * innerHeight;
    blob.style.transform = `translate3d(${x}px, ${y}px, 0) translate(-50%, -50%)`;
  });

  const box = card.getBoundingClientRect();
  card.style.setProperty("--ry", `${nx * 10}deg`);
  card.style.setProperty("--rx", `${-ny * 10}deg`);
  card.style.setProperty("--mx", `${eased.x - box.left}px`);
  card.style.setProperty("--my", `${eased.y - box.top}px`);
  card.style.setProperty("--glow", pointer.over ? "1" : "0.4");

  requestAnimationFrame(frame);
}
requestAnimationFrame(frame);

// Show or hide the password.
const peek = card.querySelector(".peek");
const password = card.querySelector('input[name="password"]');
peek.addEventListener("click", () => {
  const show = password.type === "password";
  password.type = show ? "text" : "password";
  peek.setAttribute("aria-pressed", String(show));
  peek.setAttribute("aria-label", show ? "Hide password" : "Show password");
});

// A pretend sign in, so the button has somewhere to go. Swap in your own request.
const submit = card.querySelector(".submit");
const label = submit.querySelector(".label");
card.addEventListener("submit", (event) => {
  event.preventDefault();
  if (submit.classList.contains("is-loading")) return;
  submit.classList.add("is-loading");
  label.textContent = "Signing in";
  setTimeout(() => {
    submit.classList.replace("is-loading", "is-done");
    label.textContent = "You're in";
  }, 1200);
});