:root {
    --background-color: #d8d8d8;
    --header-background: #d8d8d8;
    --message-background: #f0f0f0;
    --message-text: #000000;
    --input-background: #ffffff;
    --button-background: #a9aba9;
    --button-text: #ffffff;
    --text-color: #000000;
    --scrollbar-track: #d8d8d8;
    --scrollbar-thumb: #888;
    --scrollbar-thumb-hover: #555;
    --button-hover: #9c9c9c;
}

/* Styling */

body {
    font-family: system-ui;
    background-color: var(--background-color);
    color: var(--text-color);
    scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
    scrollbar-width: thin;
    transition: background-color 0.4s, color 0.4s;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--header-background);
    z-index: 10;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    transition: background-color 0.4s;
}

.header-link, .header-link:visited {
    color: inherit;
    text-decoration: none;
    transition: color 0.4s;
}

.header-link:hover {
     color: rgb(75, 75, 75);
     text-decoration: underline;
}

/* X Profile Button */

    .image-button {
        top: 10px;
        right: 10px;
        cursor: pointer;
        transition: opacity 0.3s ease;
    }

    .image-button img {
        width: 40px;
        height: 40px;
        border-radius: 50%; 
        border: 2px solid #fff; 
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3); 
    }

    .image-button:hover {
        opacity: 0.8;
    }

/* END X Profile Button */

.messages-container {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 60px;
    padding: 10px;
    background-color: var(--background-color);
    overflow-y: auto;
    scroll-behavior: smooth;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    transition: background-color 0.4s;
}

.message {
    padding: 8px;
    margin-bottom: 10px;
    background-color: var(--message-background);
    border-radius: 4px;
    color: var(--message-text);
    max-width: 99%;
    overflow-wrap: break-word;
    transition: background-color 0.4s, color 0.4s;
    white-space: pre-wrap;
}

/* Message Effects */

    .slide-in-bottom {
        animation: slideInBottom 0.7s ease-out forwards;
    }

    @keyframes slideInBottom {
        0% {
            transform: translateY(100%);
            opacity: 0;
        }
        100% {
            transform: translateY(0);
            opacity: 1;
        }
    }

    /* .fade-in {
        animation: fadeIn 0.7s ease-out forwards;
    }

    @keyframes fadeIn {
        0% {
            opacity: 0;
        }
        100% {
            opacity: 1;
        }
    } */

    .slide-in-left {
        animation: slideInLeft 0.7s ease-out forwards;
    }

    @keyframes slideInLeft {
        0% {
            transform: translateX(-100%);
            opacity: 0;
        }
        100% {
            transform: translateX(0);
            opacity: 1;
        }
    }

    .slide-in-right {
        animation: slideInRight 0.7s ease-out forwards;
    }

    @keyframes slideInRight {
        0% {
            transform: translateX(100%);
            opacity: 1;
        }
    }

    .scale-in {
        animation: scaleIn 0.7s ease-out forwards;
    }

    @keyframes scaleIn {
        0% {
            transform: scale(0.5);
            opacity: 0;
        }
        100% {
            transform: scale(1);
            opacity: 1;
        }
    }

    .bounce-in {
        animation: bounceIn 0.4s ease-out forwards;
    }

    @keyframes bouceIn {
        0% {
            transform: scale(0.5);
            opacity: 0;
        }
        60%{
            transform: scale(1.1);
            opacity: 1;
        }
        80% {
            transform: scale(0.9);
        }
        100% {
            transform: scale(1.0);
        }
    }

    .rotate-in {
        animation: rotateIn 0.7s ease-out forwards;
    }

    @keyframes rotateIn {
        0% {
            transform: rotate(-15deg);
            opacity: 0;
        }
        100% {
            transform: rotate(0deg);
            opacity: 1;
        }
    }

    .pulse {
        animation: pulse 0.7s ease-out forwards;
    }

    @keyframes pulse {
        0% {
            transform: scale(1.0);
        }
        50% {
            transform: scale(1.05);
        }
        100% {
            transform: scale(1.0);
        }
    }

    .shake {
        animation: shake 3.0s ease-out forwards;
    }

    @keyframes shake {
        0%, 100% {
            transform: translateX(0);
        }
        10%, 30%, 50%, 70%, 90% {
            transform: translateX(-5px);
        }
        20%, 40%, 60%, 80% {
            transform: translateX(5px);
        }
    }

    .flip-in {
        animation: flipIn 0.7s ease-out forwards;
    }

    @keyframes flipIn {
        0% {
            transform: perspective(400px) rotateY(90deg);
            opacity: 0;
        }
        100% {
            transform: perspective(400px) rotateY(0deg);
            opacity: 1;
        }
    }

/* END Message Effects */

.input-container {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 10px;
    margin: 0 auto;
    background-color: var(--input-background);
    display: flex;
    gap: 8px;
    box-shadow: 0 -2px 5px rgba(0,0,0,0.1);
    padding-left: max(10px, env(safe-area-inset-left));
    padding-right: max(10px, env(safe-area-inset-right));
    transition: backgroun-color 0.4s, color 0.4s;
}

textarea {
    flex: 1;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    min-width: 0;
    width: 0;
    background-color: var(--input-background);
    color: var(--text-color);
    transition: background-color 0.4s, color 0.4s;
    resize: vertical;
    min-height: 20px;
    max-height: 100px;
    overflow-y: auto;
    font-family: inherit;
    font-size: 16px;
}

button {
    padding: 8px 12px;
    margin-right: 10px;
    background-color: var(--button-background);
    color: var(--button-text);
    border: 1px solid #ccc;
    border-radius: 4px;
    cursor: pointer;
    white-space: nowrap;
    flex-shrink: 0;
    width: auto;
    transition: backgroung-color 0.4s, color 0.4s;
}

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

/* Scrollbar Customization */

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

    ::-webkit-scrollbar-track {
        background: var(--scrollbar-track);
        border-radius: 6px;
        transition: scrollbar-track 0.4s;
    }

    ::-webkit-scrollbar-thumb {
        background: var(--scrollbar-thumb);
        border-radius: 6px;
        transition: scrollbar-thumb 0.4s;
    }

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

/* END Scrollbar Customization */

/* Dark Mode Toggle Switch */

.toggle-container {
    display: flex;
    align-items: center;
    gap: 10px;
    width: auto;
    margin: 0;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

.header-right {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
}

@media (max-width: 600px) {
    .header-right {
        gap: 25px;
    }
}

.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.mode-text {
    opacity: 1;
    transition: opacity 0.4s;
}

.toggle-container:hover .mode-text {
    opacity: 1;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: transform 0.4s, background-color 0.4s;
    border-radius: 50%;
}

.slider:after {
    content: "";
    position: absolute;
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: transparent;
    border-radius: 50%;
    transition: transform 0.4s, background-color 0.2s;
}

input:checked + .slider {
    background-color: #121212;
}

input:checked + .slider:before {
    transform: translateX(26px);
    background-color: #ffd700;
}

input:checked + .slider:after {
    transform: translateX(17px);
    background-color: #121212;
}

/* END Dark Mode Toggle Switch */

/* Dark Mode Styling */

body.dark-mode {
    --background-color: #121212;
    --header-background: #121212;
    --message-background: #2c2c2c;
    --message-text: #e0e0e0;
    --input-background: #1e1e1e;
    --button-background: #333333;
    --button-text: #ffffff;
    --text-color: #e0e0e0;
    --scrollbar-track: #121212;
    --scrollbar-thumb: #555;
    --scrollbar-thumb-hover: #777;
    --button-hover: #444444;
}

body.dark-mode .mode-text {
    opacity: 0;
}

body.dark-mode .header-link:hover {
    color: #bbbbbb;
}

body.dark-mode input::placeholder {
    color: #aaa;
}

/* END Dark Mode Styling */