html, body {
    margin: 0;
    padding: 0;
    background: transparent;
    font-family: Apple SD Gothic Neo, "Malgun Gothic", sans-serif;
}

.gain-chat-wrap {
    width: 100%;
    height: 520px;
    display: flex;
    flex-direction: column;
    border-radius: 18px;
    overflow: hidden;
    transition: background .2s ease, color .2s ease, border-color .2s ease;
}

.gain-chat-theme-light {
    border: 1px solid rgba(98,255,232,0.18);
    background: linear-gradient(180deg, rgba(255,255,255,0.98) 0%, rgba(241,250,249,0.98) 100%);
    box-shadow: 0 12px 26px rgba(0,0,0,0.08);
}

.gain-chat-theme-dark {
    border: 1px solid rgba(80,180,190,0.25);
    background: linear-gradient(180deg, rgba(19,28,31,0.98) 0%, rgba(24,36,39,0.98) 100%);
    box-shadow: 0 12px 26px rgba(0,0,0,0.22);
}

.gain-chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 14px;
    background: linear-gradient(135deg, #0a8e8b 0%, #10aaa4 48%, #0b6f70 100%);
    color: #fff;
}

.gain-chat-header strong {
    display: block;
    font-size: 14px;
    font-weight: 700;
}

.gain-chat-room {
    display: block;
    margin-top: 4px;
    font-size: 11px;
    opacity: 0.9;
}

.gain-chat-header-actions {
    display: flex;
    align-items: center;
    gap: 6px;
}

.gain-chat-body {
    flex: 1;
    padding: 10px;
    overflow-y: auto;
}

.gain-chat-theme-light .gain-chat-body {
    background: #f5fbfb;
}

.gain-chat-theme-dark .gain-chat-body {
    background: #172326;
}

.gain-chat-item {
    display: flex;
    gap: 8px;
    margin-bottom: 10px;
}

.gain-chat-item.mine {
    flex-direction: row-reverse;
}

.gain-chat-avatar {
    width: 34px;
    min-width: 34px;
    height: 34px;
    overflow: hidden;
    border-radius: 50%;
}

.gain-chat-theme-light .gain-chat-avatar {
    background: #fff;
    border: 1px solid #d7e8e7;
}

.gain-chat-theme-dark .gain-chat-avatar {
    background: #223236;
    border: 1px solid #31484d;
}

.gain-chat-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.gain-chat-content {
    max-width: calc(100% - 42px);
}

.gain-chat-top {
    margin-bottom: 4px;
    line-height: 1.2;
}

.gain-chat-nick {
    font-size: 12px;
    font-weight: 700;
}

.gain-chat-theme-light .gain-chat-nick {
    color: #173839;
}

.gain-chat-theme-dark .gain-chat-nick {
    color: #e9ffff;
}

.gain-chat-meta {
    display: inline-block;
    margin-left: 6px;
    font-size: 11px;
}

.gain-chat-theme-light .gain-chat-meta {
    color: #7b8f8d;
}

.gain-chat-theme-dark .gain-chat-meta {
    color: #9cb3b6;
}

.gain-chat-bubble {
    padding: 9px 11px;
    border-radius: 14px;
    font-size: 13px;
    line-height: 1.55;
    word-break: break-word;
}

.gain-chat-theme-light .gain-chat-bubble {
    background: #fff;
    color: #2a3f3e;
    border: 1px solid #e2efee;
    box-shadow: 0 4px 10px rgba(0,0,0,0.04);
}

.gain-chat-theme-dark .gain-chat-bubble {
    background: #233236;
    color: #edf7f7;
    border: 1px solid #345056;
}

.gain-chat-item.mine .gain-chat-bubble {
    background: linear-gradient(135deg, #11b6b2 0%, #16c5c1 45%, #0f9e9b 100%);
    color: #fff;
    border-color: rgba(98,255,232,0.18);
}

.gain-chat-notice {
    padding: 8px 12px;
    font-size: 12px;
    border-top: 1px solid;
}

.gain-chat-theme-light .gain-chat-notice {
    color: #546968;
    border-color: #e4efef;
    background: #f8fcfc;
}

.gain-chat-theme-dark .gain-chat-notice {
    color: #9bb2b4;
    border-color: #2a4045;
    background: #1b2a2d;
}

.gain-chat-emoji-bar {
    display: flex;
    gap: 6px;
    padding: 8px 10px;
    border-top: 1px solid;
    overflow-x: auto;
}

.gain-chat-theme-light .gain-chat-emoji-bar {
    background: #ffffff;
    border-color: #e4efef;
}

.gain-chat-theme-dark .gain-chat-emoji-bar {
    background: #1c2b2e;
    border-color: #2a4045;
}

.gain-emoji-btn,
.gain-chat-btn,
.gain-tool-btn {
    border: 0;
    border-radius: 10px;
    cursor: pointer;
}

.gain-emoji-btn {
    min-width: 38px;
    height: 34px;
    font-size: 18px;
}

.gain-chat-theme-light .gain-emoji-btn,
.gain-chat-theme-light .gain-tool-btn {
    background: #eef4f4;
    color: #334;
}

.gain-chat-theme-dark .gain-emoji-btn,
.gain-chat-theme-dark .gain-tool-btn {
    background: #24363a;
    color: #e3f3f4;
}

.gain-chat-tools {
    margin-top: 6px;
    display: flex;
    gap: 4px;
}

.gain-tool-btn {
    padding: 5px 8px;
    font-size: 11px;
}

.gain-chat-btn {
    padding: 7px 10px;
    font-size: 12px;
    background: linear-gradient(135deg, #11b7b1 0%, #19d0c8 55%, #0d8f90 100%);
    color: #fff;
}

.gain-chat-btn-light {
    background: rgba(255,255,255,0.16);
    color: #fff;
    border: 1px solid rgba(255,255,255,0.22);
}

.gain-chat-form {
    display: flex;
    gap: 8px;
    padding: 10px;
    border-top: 1px solid;
}

.gain-chat-theme-light .gain-chat-form {
    border-color: #e4efef;
    background: #fff;
}

.gain-chat-theme-dark .gain-chat-form {
    border-color: #2a4045;
    background: #1a282b;
}

#gain-chat-input {
    flex: 1;
    resize: none;
    height: 56px;
    border: 1px solid;
    border-radius: 12px;
    padding: 10px;
    font-size: 13px;
    line-height: 1.45;
    box-sizing: border-box;
}

.gain-chat-theme-light #gain-chat-input {
    border-color: #d9e6e5;
    background: #fff;
    color: #223;
}

.gain-chat-theme-dark #gain-chat-input {
    border-color: #355056;
    background: #203135;
    color: #f1f8f8;
}

@media (max-width: 991px) {
    .gain-chat-wrap {
        height: 460px;
    }
}

@media (max-width: 640px) {
    .gain-chat-wrap {
        height: 420px;
        border-radius: 14px;
    }

    .gain-chat-header {
        padding: 10px 12px;
    }

}