:root {
--card: rgba(255,255,255,0.1);
--text: #000000;
}

.light-mode {
--card: rgba(255,255,255,0.85);
--text: #000;
}

body {
margin: 0;
overflow: hidden;
font-family: 'Segoe UI', sans-serif;
}

canvas {
position: fixed;
top: 0;
left: 0;
z-index: -1;
}

/* Glass UI */
.container {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
backdrop-filter: blur(15px);
background: var(--card);
padding: 30px;
width: 350px;
border-radius: 15px;
box-shadow: 0 10px 40px rgba(0,0,0,0.3);
color: var(--text);
animation: fadeIn 1s ease;
}

@keyframes fadeIn {
from {opacity:0; transform: translate(-50%, -60%);}
to {opacity:1; transform: translate(-50%, -50%);}
}

h2 {
text-align: center;
}

/* Floating labels */
.input-group {
position: relative;
margin: 20px 0;
}

.input-group input {
width: 100%;
padding: 12px;
border: 1px solid #aaa;
border-radius: 6px;
background: transparent;
color: var(--text);
outline: none;
}

.input-group label {
position: absolute;
left: 10px;
top: 50%;
transform: translateY(-50%);
color: #aaa;
transition: 0.3s;
}

.input-group input:focus + label,
.input-group input:not(:placeholder-shown) + label {
top: -8px;
font-size: 12px;
color: cyan;
}

/* Tick */
.tick {
position: absolute;
right: 10px;
top: 12px;
color: #00ff88;
display: none;
}

/* Strength bar */
.strength-bar {
height: 6px;
background: #ccc;
border-radius: 5px;
margin-top: 6px;
}

.strength-fill {
height: 100%;
width: 0%;
border-radius: 5px;
transition: 0.4s;
}

.strength-text {
font-size: 12px;
margin-top: 5px;
}

/* Button */
button {
width: 100%;
padding: 12px;
border: none;
background: cyan;
border-radius: 6px;
cursor: pointer;
transition: 0.3s;
}

button:hover {
transform: scale(1.05);
background: #00bcd4;
}

/* Toggle */
.toggle {
position: absolute;
top: 20px;
right: 20px;
color: white;
cursor: pointer;
}