:root {
    --radius: 8px;
    --slide-duration: 0.3s;
    --slide-timing: ease-out;
}

.chat-floating-button {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--button-bg);
    color: var(--button-text);
    border: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    transition: all var(--slide-duration) var(--slide-timing);
}

.chat-floating-button:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
}

.chat-floating-button:active {
    transform: scale(0.95);
}

.chat-floating-button .chat-icon {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

.chat-floating-button .unread-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background-color: var(--error, #ff4444);
    color: var(--button-text, white);
    border-radius: 50%;
    width: 18px;
    height: 18px;
    font-size: 0.65em;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: pulse 2s infinite;
}

.chat-container {
    position: fixed;
    border: 1px solid var(--button-bg);
    bottom: 20px;
    right: 20px;
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    background-color: var(--bg);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: transform var(--slide-duration) var(--slide-timing),
        opacity var(--slide-duration) var(--slide-timing);
    transform-origin: bottom right;
    z-index: 999;
    width: 350px;
    max-width: calc(100vw - 40px);
    max-height: 70vh;
    overflow: hidden;
}

.chat-container.collapsed {
    transform: translateY(100%) scale(0.9);
    opacity: 0;
    pointer-events: none;
}

.chat-container:not(.collapsed) {
    transform: translateY(0) scale(1);
    opacity: 1;
    pointer-events: all;
}

.chat-container .icon-button {
    font-size: smaller;
    transition: transform 0.2s ease;
    color: inherit;
}

.chat-container .icon-button:hover {
    transform: scale(1.1);
}

.chat-header {
    border-bottom: 1px solid var(--button-bg);
    font-weight: bold;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: var(--button-bg);
    color: var(--button-text);
    border-radius: var(--radius) var(--radius) 0 0;
    user-select: none;
}

.chat-header:hover {
    background-color: var(--button-hover-bg, var(--button-bg));
}

.chat-container .chat-header span button.icon-button {
    margin-left: 8px;
}

.chat-messages {
    display: flex;
    flex-direction: column;
    overflow-y: scroll;
    height: 300px;
    min-height: 300px;
    padding: 10px;
    gap: 0;
    background-color: var(--bg2, var(--bg));
}

.chat-messages {
    scroll-behavior: smooth;
}

.chat-container form {
    display: flex;
    justify-content: space-between;
    padding: 12px;
    border-top: 1px solid var(--button-bg);
    align-items: center;
    background-color: var(--bg);
    border-radius: 0 0 var(--radius) var(--radius);
    gap: 8px;
}

.chat-container input {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid var(--button-bg);
    border-radius: 12px;
    margin-right: 0;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    background-color: var(--bg);
    color: var(--fg);
    font-size: 13px;
}

.chat-container input:focus {
    outline: none;
    border-color: var(--button-bg);
    box-shadow: 0 0 0 2px rgba(var(--button-bg-rgb, 0, 120, 215), 0.1);
}

.chat-send-button {
    background-color: var(--button-bg);
    color: var(--button-text);
    border: none;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.chat-send-button:hover:not(:disabled) {
    background-color: var(--button-hover-bg, var(--button-bg));
    transform: scale(1.05);
}

.chat-send-button:active:not(:disabled) {
    transform: scale(0.95);
}

.chat-send-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.chat-send-button .send-icon {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

.msg {
    display: flex;
    flex-direction: column;
    max-width: 80%;
    animation: slideInUp 0.2s ease-out;
}

.msg.msg-user {
    align-self: flex-end;
    align-items: flex-end;
}

.msg.msg-user .msg-bubble {
    background-color: var(--button-bg);
    color: var(--button-text);
    border-radius: 12px 12px 2px 12px;
}

.msg.msg-anon {
    align-self: flex-start;
    align-items: flex-start;
}

.msg.msg-anon .msg-bubble {
    background-color: var(--button-bg);
    color: var(--button-text);
    border-radius: 12px 12px 12px 2px;
}

.msg.consecutive {
    margin-top: 1px;
}

.msg:not(.consecutive) {
    margin-top: 6px;
}

.msg-bubble {
    padding: 6px 10px;
    position: relative;
    word-wrap: break-word;
    line-height: 1.3;
    max-width: 100%;
}

.msg-sender {
    font-size: 0.7em;
    opacity: 0.8;
    margin-bottom: 1px;
    font-weight: 600;
    padding: 0 4px;
    color: var(--fg);
}

.msg-content {
    margin: 0;
    font-size: 13px;
    line-height: 1.3;
    word-wrap: break-word;
}

.msg-meta {
    display: flex;
    align-items: center;
    margin-top: 2px;
    font-size: 0.65em;
    opacity: 0.7;
}

.msg.msg-user .msg-meta {
    justify-content: flex-end;
}

.msg.msg-anon .msg-meta {
    justify-content: flex-start;
}

.msg-ts {
    font-size: 0.65em;
    opacity: 0.7;
    color: var(--fg);
}

.date-separator {
    text-align: center;
    margin: 16px 0;
    font-size: 0.8em;
    opacity: 0.7;
    position: relative;
    color: var(--fg);
}

.date-separator::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background-color: var(--border, #e0e0e0);
    z-index: 1;
}

.date-separator span {
    background-color: var(--bg2, var(--bg));
    padding: 4px 12px;
    border-radius: 12px;
    position: relative;
    z-index: 2;
    display: inline-block;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.chat-charcounter {
    text-align: end;
    min-width: 80px;
    font-size: 0.8em;
    opacity: 0.7;
    transition: color 0.2s ease;
    color: var(--fg);
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.7;
        transform: scale(1.05);
    }
}

.chat-header .unread-indicator {
    animation: pulse 2s infinite;
    background-color: var(--error, #ff4444);
    color: var(--button-text, white);
    border-radius: 50%;
    padding: 2px 6px;
    font-size: 0.8em;
    margin-left: 8px;
}

@media (max-width: 672px) {
    .chat-container {
        bottom: 0;
        right: 0;
        left: 0;
        width: auto;
        max-width: none;
        max-height: none;
        height: 100vh;
        border-radius: 0;
        border: none;
    }

    .chat-header {
        border-radius: 0;
    }

    .chat-container form {
        border-radius: 0;
    }

    .chat-messages {
        height: calc(100vh - 120px);
        min-height: auto;
        flex: 1;
    }

    .msg {
        max-width: 85%;
    }
}

@media (max-width: 70em) and (min-width: 673px) {
    .chat-floating-button {
        bottom: 15px;
        right: 15px;
        width: 45px;
        height: 45px;
    }

    .chat-container {
        bottom: 15px;
        right: 15px;
        width: 350px;
        max-width: calc(100vw - 40px);
    }

    .chat-messages {
        height: 250px;
        min-height: 250px;
        padding: 8px;
    }

    .chat-floating-button .chat-icon {
        width: 18px;
        height: 18px;
    }

    .chat-floating-button .unread-badge {
        width: 16px;
        height: 16px;
        font-size: 0.6em;
    }

    .msg {
        max-width: 80%;
    }

    .chat-send-button {
        width: 34px;
        height: 34px;
    }

    .chat-send-button .send-icon {
        width: 16px;
        height: 16px;
    }
}

@media (max-height: 600px) and (min-width: 673px) {
    .chat-messages {
        height: 200px;
        min-height: 200px;
    }
}

@media (max-height: 400px) and (min-width: 673px) {
    .chat-messages {
        height: 150px;
        min-height: 150px;
    }
}

@media (max-width: 480px) {
    .chat-floating-button {
        bottom: 10px;
        right: 10px;
        width: 40px;
        height: 40px;
    }

    .chat-floating-button .chat-icon {
        width: 16px;
        height: 16px;
    }

    .msg {
        max-width: 90%;
    }

    .chat-messages {
        padding: 6px;
    }

    .chat-send-button {
        width: 32px;
        height: 32px;
    }

    .chat-send-button .send-icon {
        width: 14px;
        height: 14px;
    }
}