Wave Underline Input

abhishek001
Jan 25, 2026 6
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  <div class="container">
        <div class="input-box">
            <input type="text" class="wave-input" required>
            <label class="wave-label">Username</label>
            <div class="wave-underline"></div>
        </div>
    </div>
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.container {
    width: 100%;
    max-width: 400px;
}

.input-box {
    position: relative;
}

.wave-input {
    width: 100%;
    padding: 1rem 0;
    font-size: 1.2rem;
    color: #fff;
    background: transparent;
    border: none;
    border-bottom: 2px solid rgba(255, 255, 255, 0.3);
    outline: none;
    transition: all 0.3s ease;
}

.wave-label {
    position: absolute;
    top: 1rem;
    left: 0;
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.1rem;
    pointer-events: none;
    transition: all 0.3s ease;
}

.wave-input:focus ~ .wave-label,
.wave-input:valid ~ .wave-label {
    top: -1.5rem;
    font-size: 0.9rem;
    color: #fff;
    font-weight: 600;
}

.wave-underline {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, #fff, #ffd700, #fff);
    background-size: 200% 100%;
    transition: width 0.4s ease;
}

.wave-input:focus ~ .wave-underline {
    width: 100%;
    animation: wave 1.5s ease-in-out infinite;
}

@keyframes wave {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

@media (max-width: 768px) {
    .wave-input {
        font-size: 1rem;
    }

    .wave-label {
        font-size: 1rem;
    }
}
Categories

Wave Underline Input

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