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

:root {
    --text-color: black;
    --body-background-color: #f0f2f5;
    --div-background-color: white;
    --border: 1px solid lightgrey;

    --input: white;
    --button-txt: black;
    --button-bg: #f0f2f5;
    --button-bg-hover: rgba(149, 225, 211, 0.77);

    --scrollbar-track: #eeeff1;
    --scrollbar-thumb: #e0e1e4;
    --scrollbar-thumb-hover: #b6b7b9;

    --select-color: #000;
    --selection: #c1daf3;
}

body {
    font-family: "Nunito", sans-serif, system-ui;
    background: #f1f1f1;
}

.container {
    max-width: 1170px;
    margin: auto;
    padding: 0 15px;
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-top: 30px;
}

.container>div {
    background: #fff;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0px 0px 10px -10px rgba(0, 0, 0, 0.75);
    width: 100%;
    border: 1px solid lightgrey;

}

.left {
    flex: 1;
}

.right {
    flex: 2;
}

button {
    color: var(--button-txt);
    padding: 5px;
    outline: none;
    border: var(--border);
    box-shadow: 0px 0px 20px -20px;
    border-radius: 10px;
    height: 30px;
    background-color: var(--buttons-bg);
    transition: all 0.3s ease-in-out;
    margin-left: 10px;
    margin-bottom: 10px;
    user-select: none;
    float: right;
}

button:hover {
    background-color: var(--button-bg-hover);
    cursor: pointer;
}

button:active {
    transform: scale(0.95);
}

.msg {
    margin-top: 15px;
    padding: 10px;
    border-radius: 10px;
    margin-bottom: 10px;
    background-color: var(--div-background-color);
    border: var(--border);
    box-shadow: 0px 0px 20px -20px;
    user-select: none;
    display: grid;
    grid-template-columns: 3fr 1fr 1fr;
    align-items: center;
}


.btn-send {
    padding: 10px;
    outline: none;
    border: var(--border);
    box-shadow: 0px 0px 20px -20px;
    border-radius: 10px;
    height: 50px;
    background-color: var(--button-bg);
    transition: all 0.3s ease-in-out;
    font-size: 16px;
    user-select: none;
    color: var(--button-txt);
    margin-top: 5px;
    width: fit-content;
}

.btn-send:hover {
    background-color: var(--button-bg-hover);
    cursor: pointer;
}

.btn-send:active {
    transform: scale(0.95);
}


#message {
    outline: none;
    border: var(--border);
    box-shadow: 0px 0px 20px -20px;
    padding: 10px;
    transition: all 0.3s ease-in-out;
    width: 50%;
    height: 50px;
    margin: 5px;
    font-size: 16px;
    border-radius: 20px;
    margin-top: 5px;
    margin-bottom: 5px;
    display: inline-block;
    color: var(--text-color);
    background-color: var(--input);
}

#message:focus {
    transform: scale(1.025);
}

.chatbox {
    height: 500px;
    overflow-y: scroll;
    scrollbar-width: thin;
    scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
    display: flex;
    flex-direction: column;
    padding-top: 10px;
    padding-bottom: 10px;
    gap: 8px;
}

/* Small but modern message like facebook messenger */

.message {
    background-color: var(--body-background-color);
    max-width: 475px;
    min-width: 175px;
    width: fit-content;
    height: auto;
    border-radius: 20px 20px 20px 5px;
    /* Rounded on top left, top right, bottom right, and bottom left respectively */
    padding: 5px;
    color: var(--text-color);
    font-size: 16px;
    overflow-wrap: break-word;
    position: relative;
    border: var(--border);
    transition: all 0.25s cubic-bezier(0.075, 0.82, 0.165, 1);
    animation: fade 0.25s cubic-bezier(0.075, 0.82, 0.165, 1);
}


.message::first-line {
    font-weight: 500;
}

.message:hover,
.message:active {
    box-shadow: 0px 0px 12.5px -10px;
}

.me {
    margin-left: auto;
    margin-right: 10px;
}

.message>span>img {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    margin-right: 10px;
    z-index: 500;
    transition: all 0.3s ease-in-out;
    user-select: none;
    pointer-events: none;
}

.sender {
    font-size: 14px;
    user-select: none;
}

.sender:hover {
    cursor: pointer;
    text-decoration: underline;
}

.time {
    font-size: 12px;
    color: var(--text-color);
}

::selection {
    background-color: var(--selection);
    color: var(--text-color);
}

.title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 40px;
    padding: 10px;
}

.title>button {
    font-size: 14px;
}

.hidden {
    display: none;
}

#data {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

#data>p>img {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    margin-right: 10px;
    z-index: 500;
    transition: all 0.3s ease-in-out;
}

#data>p>img:hover {
    cursor: pointer;
}

#users {
    display: flex;
    flex-direction: column;
    gap: 10px;
    height: 500px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
    margin-top: 15px;
}

#users>div {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    border-radius: 10px;
    transition: all 0.25s cubic-bezier(0.165, 0.84, 0.44, 1);
    background-color: var(--body-background-color);
    border: var(--border);
}

#users>div:hover {
    cursor: pointer;
    background-color: var(--button-bg-hover);
}

/*Smooth popup fade animation */

@keyframes fade {
    from {
        opacity: 0;
        scale: 0.5;
    }

    to {
        opacity: 1;
        scale: 1;
    }
}

::-webkit-scrollbar {
    width: 5px;
}

::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
}

::-webkit-scrollbar-thumb {
    background-color: var(--scrollbar-thumb);
    border-radius: 20px;
}

::-webkit-scrollbar-thumb:hover {
    background-color: var(--scrollbar-thumb-hover);
}


.file-input-container {
    display: inline-block;
    position: relative;
}

.file-input-container input[type="file"] {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.file-input-container label {
    display: inline-block;
    background-color: #3498db;
    color: #fff;
    padding: 8px;
    border-radius: 4px;
    font-family: Arial, sans-serif;
    font-size: 14px;
    cursor: pointer;
}

.file-input-container label:hover {
    background-color: #2980b9;
}

.file-input-container span {}

#bytes {
    font-size: 12px;
    color: var(--text-color);
}


.download-box {
    background-color: #f4f4f4;
    padding: 10px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    flex-direction: column;
    justify-content: space-between;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 16px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.download-box span {
    color: #333;
}


.download-box a {
    text-decoration: none;
    color: #007bff;
    display: flex;
    align-items: center;
    transition: color 0.3s ease;
}

.download-box a:hover {
    color: #0056b3;
}

.download-box i {
    font-size: 18px;
    margin-left: 5px;
}