Stellar Text Button - Free UI Component

Accent Color #818cf8

Text Color #94a3b8

Button Label View Documentation

Font Size (rem) 1

Vertical Padding (rem) 0.75

Horizontal Padding (rem) 1.5

Stellar Text Button

A minimalist text-only button with a kinetic underline effect that grows from the center on hover. Includes a subtle atmospheric glow for a premium feel.

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Tertiary Text Button</title>
    <link rel="preconnect" href="https://fonts.googleapis.com">
    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
    <link href="https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@500;600;700;800&display=swap" rel="stylesheet">
    <style>
        /* -- Variables ------------------------------------------------- */
        :root {
            --accent: {{accentColor}};           /* Hover Underline / Glow */
            --text: {{textColor}};               /* Base Text Color */
            --font-size: {{fontSize}}rem;        /* Text Size */
            --v-pad: {{vPadding}}rem;            /* Vertical Balance */
            --h-pad: {{hPadding}}rem;            /* Horizontal Breathing Room */
            --page-bg: #0f172a;                  /* Background context */
        }

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

body {
            font-family: 'Plus Jakarta Sans', sans-serif;
            background-color: var(--page-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 100vh;
            color: #fff;
        }

/* -- Button Implementation --------------------------------------- */
        .btn-tertiary {
            position: relative;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: var(--v-pad) var(--h-pad);
            font-size: var(--font-size);
            font-weight: 700;
            color: var(--text);
            background: transparent;
            border: none;
            cursor: pointer;
            text-decoration: none;
            transition: all 0.3s ease;
            letter-spacing: -0.01em;
            outline: none;
        }

/* Kinetic Underline */
        .btn-tertiary::after {
            content: '';
            position: absolute;
            bottom: calc(var(--v-pad) / 2);
            left: 50%;
            width: 0;
            height: 2px;
            background: var(--accent);
            box-shadow: 0 0 8px var(--accent);
            transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            transform: translateX(-50%);
            border-radius: 2px;
        }

.btn-tertiary:hover {
            color: var(--accent);
            text-shadow: 0 0 10px color-mix(in srgb, var(--accent), transparent 50%);
        }

.btn-tertiary:hover::after {
            width: calc(100% - (var(--h-pad) * 2));
        }

.btn-tertiary:active {
            transform: translateY(1px) scale(0.98);
        }

/* Ambient Glow Layer */
        .btn-tertiary::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 120%;
            height: 140%;
            background: radial-gradient(circle, var(--accent), transparent 70%);
            transform: translate(-50%, -50%) scale(0.8);
            opacity: 0;
            transition: 0.4s ease;
            z-index: -1;
            pointer-events: none;
        }

.btn-tertiary:hover::before {
            opacity: 0.1;
            transform: translate(-50%, -50%) scale(1);
        }

</style>
</head>
<body>

<button class="btn-tertiary">
        {{buttonText}}
    </button>

</body>
</html>