/*--------------------------------------------------------------
# Global Attributes
--------------------------------------------------------------*/
:root {
    --nickname-body-bg: rgba(10, 15, 25, 1);
    --nickname-panel-bg: rgba(20, 30, 40, .9);
    --nickname-panel-border: 1px solid rgba(255, 255, 255, .15);
    --nickname-panel-box-shadow: 0 4px 12px rgba(0, 0, 0, .6);
    --nickname-panel-hover-box-shadow: 0 0px 12px rgba(160, 200, 240, .15);
    --nickname-panel-title-color: #e0e6f0;
    --nickname-panel-text-color: #c0c8d8;
    --nickname-panel-hint-color: #9aa8b8;
    --nickname-panel-hint-link-color: #fff3b0;
    --nickname-input-bg: rgba(15, 25, 35, .8);
    --nickname-input-hover-bg: rgba(20, 30, 45, .9);
    --nickname-input-focus-bg: rgba(25, 35, 50, .95);
    --nickname-input-border: 1px solid rgba(255, 255, 255, .15);
    --nickname-input-hover-border: 1px solid rgba(192, 200, 216, .25);
    --nickname-input-focus-border: 1px solid #a0b8d0;
    --nickname-input-focus-box-shadow: 0 0 8px rgba(160, 200, 240, .4);
    --nickname-input-text-color: #e0e6f0;
    --nickname-input-placeholder-color: #9aa8b8;
    --nickname-input-webkit-autofill-bg: rgba(15,25,35,.9);
    --nickname-input-webkit-autofill-text-color: #e0e6f0;
    --nickname-input-webkit-autofill-border: 1px solid rgba(255,255,255,.15);
    --nickname-input-webkit-autofill-box-shadow: 0 0 0px 1000px rgba(15,25,35,.9) inset;
    --nickname-button-bg:  linear-gradient(145deg, rgba(20, 30, 40, 1) 0%, rgba(35, 45, 55, 1) 40%, rgba(20, 30, 40, 1) 100%);
    --nickname-button-hover-bg: linear-gradient(145deg, rgba(30, 40, 50, 1) 0%, rgba(45, 55, 65, 1) 40%, rgba(25, 35, 50, 1) 100%);
    --nickname-button-border: 1px solid rgba(255, 255, 255, .15);
    --nickname-button-box-shadow:  inset 0 0 10px rgba(160, 200, 240, .15), 0 4px 8px rgba(0, 0, 0, .7);
    --nickname-button-hover-box-shadow: inset 0 0 15px rgba(160, 200, 240, .25), 0 6px 12px rgba(0, 0, 0, .9);
    --nickname-button-text-color: #e0e6f0;
    --nickname-button-hover-text-color: #f5f9ff;
    --nickname-buttin-text-shadow: 1px 1px 2px rgba(0, 0, 0, .8);
}
html {
    box-sizing: border-box;
}
*{
    margin: 0;
    padding: 0;
    list-style: none;
}
*, *:before, *:after {
    box-sizing: inherit;
}
body {
    margin: 0;
    background-color: var(--nickname-body-bg); 
    overflow: hidden;
    display: flex; 
    justify-content: center;   
    align-items: center;
    height: 100vh;
    width: 100vw;
}
button:focus,
input:focus {
    outline: none;
}
/*--------------------------------------------------------------
# Message Container
--------------------------------------------------------------*/
.container {
    width: 100%;
    max-width: 500px;
    padding: 25px;
    display: flex;
    align-items: center;
    flex-direction: column;
    text-align: center;
    border-radius: 8px;
    background: var(--nickname-panel-bg); 
    border: var(--nickname-panel-border);
    box-shadow: var(--nickname-panel-box-shadow);            
    overflow: hidden;
    transition: box-shadow .3s ease-in-out;
    gap: 1.5rem;
}
.container:hover {
    box-shadow: var(--nickname-panel-hover-box-shadow);            
}
.header {
    display: flex;
    flex-direction: column;
    gap: .5rem;
    letter-spacing: 1px;
}
.title {
    color: var(--nickname-panel-title-color);
    text-align: center;
    font-size: 1.4em;
    font-weight: 600;
}
.description {
    font-size: .7em;
    color: var(--nickname-panel-text-color);
}
.form {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}
.form input {
    width: 70%;
    padding: 1em;
    border-radius: 8px;
    border: var(--nickname-input-border);
    background-color: var(--nickname-input-bg);
    color: var(--nickname-input-text-color);
    font-size: 1em;
    outline: none;            
    transition: all .3s ease-in-out;
}
.form input::placeholder {
    color: var(--nickname-input-placeholder-color);
}
.form input:hover {
    background-color: var(--nickname-input-hover-bg);
    border: var(--nickname-input-hover-border);
    cursor: pointer;
}
.form input:focus {
    background-color: var(--nickname-input-focus-bg);
    border: var(--nickname-input-focus-border);
    box-shadow: var(--nickname-input-focus-box-shadow);
    cursor: text;
}
.container form input:-webkit-autofill {
    background-color: var(--nickname-input-webkit-autofill-bg) !important;
    border: var(--nickname-input-webkit-autofill-border) !important;
    -webkit-text-fill-color: var(--nickname-input-webkit-autofill-text-color) !important;
    box-shadow: var(--nickname-input-webkit-autofill-box-shadow) !important; 
    transition: background-color 5000s ease-in-out 0s; 
}
.hint {
    font-size: .75em;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--nickname-panel-hint-color);
    letter-spacing: 2px;
    cursor: default;
}
.hint a {
    cursor: pointer;
    color: var(--nickname-panel-hint-color);
    margin-left: 2px;
    letter-spacing: 1px;
    transition: .2s ease-in-out;
}
.hint a:hover {
    color: var(--nickname-panel-hint-link-color);
}
/*--- Button ---*/
.form button {
    width: 40%;
    padding: .9em 1.25em;
    border-radius: 8px;
    cursor: pointer;
    transition: all .3s ease-in-out;
    font-size: 1em;
    font-weight: bold;
    border: var(--nickname-button-border); 
    background: var(--nickname-button-bg); 
    box-shadow: var(--nickname-button-box-shadow);
    color: var(--nickname-button-text-color); 
    text-shadow: var(--nickname-buttin-text-shadow); 
    letter-spacing: 2px;
}
.form button:hover {
    background: var(--nickname-button-hover-bg);   
    box-shadow: var(--nickname-button-hover-box-shadow);
    color: var(--nickname-button-hover-text-color);   
}

@media(max-width: 500px) {
    .container {
        max-width: 90%;
        padding: 20px;
    }
    .title {
        font-size: 1.2em;
    }
    .form input {
        width: 100%;
    }
}