:root {
    --accent-color: #00FFC8;
    --main-button-bg: #333333;
    --pattern-color: #2b2b2b;
    --pattern-size: 40px;
    --bg-color: #1a1a1a;
    --text-color: #ffffff;
    --shadow-soft: 0 4px 8px rgba(0,0,0,0.6);
}

@keyframes flow {
    from { background-position: 0 0; }
    to { background-position: var(--pattern-size) var(--pattern-size); }
}

html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background-color: var(--bg-color);
    background-image:
        linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    background-position: center center;
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
    box-sizing: border-box;
    z-index: 20;
    position: relative;
}

.form-container {
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(6px);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.05);
    width: 100%;
    box-sizing: border-box;
}

h2 {
    color: #fff;
    text-align: center;
    margin-bottom: 25px;
    margin-top: 0;
    font-size: 1.8rem;
}

label {
    display: block;
    margin-bottom: 8px;
    color: #ccc;
    font-size: 0.95rem;
}

input[type="text"], input[type="email"], input[type="password"] {
    width: 100%;
    padding: 12px;
    margin-bottom: 20px;
    border: 1px solid #444;
    border-radius: 8px;
    box-sizing: border-box;
    background-color: #222;
    color: #fff;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
}

input[type="text"]:focus, input[type="email"]:focus, input[type="password"]:focus {
    border-color: var(--accent-color);
}

input[type="checkbox"] {
    accent-color: var(--accent-color);
    cursor: pointer;
}

input[type="submit"], button[type="submit"], .gb-button {
    background-color: var(--main-button-bg);
    background-image: conic-gradient(from 45deg at 50% 50%, var(--pattern-color) 0deg 90deg, var(--main-button-bg) 90deg 180deg, var(--pattern-color) 180deg 270deg, var(--main-button-bg) 270deg 360deg);
    background-size: var(--pattern-size) var(--pattern-size);
    animation: flow 10s linear infinite;

    color: #ffffff;
    font-size: 1.1rem;
    font-weight: bold;
    padding: 15px 20px;
    border-radius: 10px;
    width: 100%;
    border: none;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    cursor: pointer;
    transition: transform 0.05s linear;
    margin-top: 10px;

    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    text-decoration: none;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

input[type="submit"] {
    display: block;
}

input[type="submit"]:active, button[type="submit"]:active, .gb-button:active {
    transform: scale(0.96);
}

input[type="submit"]:disabled, button[type="submit"]:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    animation: none;
}

.gb-button:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

.msg {
    margin-bottom: 20px;
    padding: 10px;
    border-radius: 5px;
    text-align: center;
    font-weight: bold;
}

.error {
    color: #ff5555;
    text-align: center;
    margin-bottom: 20px;
    font-weight: bold;
    background: rgba(255, 85, 85, 0.1);
    padding: 10px;
    border-radius: 5px;
}

.link-switch {
    text-align: center;
    margin-top: 25px;
    font-size: 0.95em;
    color: #aaa;
}

.link-switch a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: bold;
}

.link-switch a:hover {
    text-decoration: underline;
}

.hp-field {
    opacity: 0;
    position: absolute;
    top: 0;
    left: 0;
    height: 0;
    width: 0;
    z-index: -1;
}

.cf-container {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

h1 {
    text-align: center;
    font-size: clamp(1.5rem, 5vw, 2.5rem);
    margin-bottom: 30px;
    margin-top: 0;
    line-height: 1.2;
}

.kirby-mascot {
    width: 120px;
    height: auto;
    margin: 0 auto 15px auto;
    display: block;
    image-rendering: pixelated;
    filter: drop-shadow(0 4px 6px rgba(0,0,0,0.5));
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0px); }
}

.button-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    max-width: 300px;
    gap: 12px;
}