.chat-header,
.sidebar {
    backdrop-filter: blur(var(--blur-amount)) saturate(120%)
}

*,
.chat-header {
    box-sizing: border-box
}

.message-content .text-content-inner em,
.message-content .text-content-inner i,
.no-chats {
    font-style: italic
}

:root {
    --base-hue: 220;
    --accent-hue: 180;
    --bg-primary: hsl(var(--base-hue), 20%, 10%);
    --bg-secondary: hsla(var(--base-hue), 15%, 15%, 0.6);
    --bg-tertiary: hsla(var(--base-hue), 15%, 20%, 0.5);
    --bg-glass-edge: hsla(0, 0%, 100%, 0.1);
    --bg-hover: hsla(var(--base-hue), 15%, 25%, 0.7);
    --bg-active: hsla(var(--accent-hue), 70%, 50%, 0.3);
    --bg-code-fallback: hsla(var(--base-hue), 20%, 15%, 0.8);
    --text-primary: hsl(var(--base-hue), 15%, 95%);
    --text-secondary: hsl(var(--base-hue), 10%, 70%);
    --text-accent: hsl(var(--accent-hue), 80%, 60%);
    --text-on-accent-bg: hsl(var(--accent-hue), 100%, 98%);
    --text-error: hsl(0, 80%, 70%);
    --text-code-fallback: hsl(var(--base-hue), 15%, 85%);
    --accent-primary: hsl(var(--accent-hue), 75%, 55%);
    --accent-glow: hsla(var(--accent-hue), 80%, 60%, 0.5);
    --accent-gradient: linear-gradient(135deg, hsl(var(--accent-hue), 75%, 55%), hsl(var(--base-hue), 60%, 60%));
    --border-radius-sm: 6px;
    --border-radius-md: 10px;
    --border-radius-lg: 16px;
    --border-glass: 1px solid var(--bg-glass-edge);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 5px 10px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 15px var(--accent-glow);
    --sidebar-width: 280px;
    --header-height: 65px;
    --avatar-size: 34px;
    --transition-speed: 0.25s;
    --blur-amount: 8px;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-family-code: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, Courier, monospace;
    --safe-area-inset-top: env(safe-area-inset-top, 0px);
    --safe-area-inset-right: env(safe-area-inset-right, 0px);
    --safe-area-inset-bottom: env(safe-area-inset-bottom, 0px);
    --safe-area-inset-left: env(safe-area-inset-left, 0px)
}

* {
    margin: 0;
    padding: 0;
    font-family: var(--font-family)
}

body,
html {
    height: 100%;
    color: var(--text-primary);
    font-size: 16px;
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale
}

.app-background {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
    background: var(--bg-primary) url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" width="100%" height="100%"><defs><filter id="noise" x="-20%" y="-20%" width="140%" height="140%"><feTurbulence type="fractalNoise" baseFrequency="0.015" numOctaves="3" stitchTiles="stitch"/><feComponentTransfer><feFuncA type="linear" slope="0.1"/></feComponentTransfer></filter><linearGradient id="grad" x1="0%" y1="0%" x2="100%" y2="100%"><stop offset="0%" stop-color="hsl(var(--base-hue), 30%, 20%)"/><stop offset="100%" stop-color="hsl(var(--base-hue), 40%, 10%)"/></linearGradient></defs><rect width="100%" height="100%" fill="url(%23grad)"/><rect width="100%" height="100%" filter="url(%23noise)"/></svg>') center/cover;
    opacity: .8
}

.app-container {
    display: flex;
    height: 100dvh;
    position: relative;
    background: 0 0
}

::-webkit-scrollbar {
    width: 8px;
    height: 8px
}

.chat-area,
.sidebar {
    height: 100%;
    display: flex;
    position: relative
}

::-webkit-scrollbar-track {
    background: hsla(var(--base-hue), 15%, 15%, .2);
    border-radius: 10px
}

::-webkit-scrollbar-thumb {
    background-color: hsla(var(--accent-hue), 60%, 50%, .5);
    border-radius: 10px;
    border: 2px solid transparent;
    background-clip: content-box
}

::-webkit-scrollbar-thumb:hover {
    background-color: hsla(var(--accent-hue), 70%, 55%, .7)
}

.sidebar {
    width: var(--sidebar-width);
    flex-direction: column;
    background: var(--bg-secondary);
    border-right: var(--border-glass);
    transition: margin-left var(--transition-speed) ease, transform var(--transition-speed) ease;
    box-shadow: var(--shadow-md);
    z-index: 100;
    padding-top: var(--safe-area-inset-top);
    padding-bottom: var(--safe-area-inset-bottom)
}

.sidebar-header {
    padding: 20px 15px;
    border-bottom: var(--border-glass);
    flex-shrink: 0
}

.sidebar-button {
    background: var(--accent-gradient);
    color: var(--text-on-accent-bg);
    border: none;
    padding: 12px 18px;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    width: 100%;
    font-size: 1rem;
    font-weight: 600;
    transition: all var(--transition-speed) ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: var(--shadow-sm), 0 0 8px hsla(var(--accent-hue), 75%, 55%, .3)
}

.chat-list-item,
.control-group label,
.delete-chat-btn,
.footer-branding,
.message-avatar,
.no-chats,
.sidebar-toggle-btn {
    color: var(--text-secondary)
}

.sidebar-button:hover {
    box-shadow: var(--shadow-md), 0 0 15px hsla(var(--accent-hue), 75%, 55%, .5);
    transform: translateY(-2px) scale(1.01)
}

.sidebar-button i {
    font-size: 1.2em;
    transform: translateY(1px)
}

.chat-list-container {
    flex-grow: 1;
    overflow-y: auto;
    padding: 10px 0
}

.chat-list {
    list-style: none
}

.chat-list-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 13px 15px 13px 20px;
    margin: 5px 10px;
    cursor: pointer;
    border-radius: var(--border-radius-sm);
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease, transform var(--transition-speed) ease;
    position: relative;
    border: 1px solid transparent
}

.chat-list-item .chat-title-text {
    flex-grow: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-right: 10px
}

.chat-list-item:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
    transform: translateX(3px)
}

.chat-list-item.active {
    background-color: var(--bg-active);
    color: var(--text-accent);
    font-weight: 500;
    border: 1px solid hsla(var(--accent-hue), 70%, 50%, .4)
}

.chat-list-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 70%;
    background: var(--accent-primary);
    border-radius: 0 3px 3px 0
}

.delete-chat-btn {
    background: 0 0;
    border: none;
    cursor: pointer;
    padding: 5px 8px;
    font-size: .95em;
    opacity: 0;
    transition: opacity var(--transition-speed) ease, color var(--transition-speed) ease;
    border-radius: 50%;
    flex-shrink: 0
}

.chat-list-item:hover .delete-chat-btn {
    opacity: .6
}

.chat-list-item .delete-chat-btn:hover,
.chat-list-item.active .delete-chat-btn:hover {
    opacity: 1;
    color: var(--text-error);
    background-color: hsla(0, 80%, 70%, .1)
}

.chat-list-item.active .delete-chat-btn {
    opacity: .7;
    color: var(--text-accent)
}

.no-chats {
    padding: 20px;
    text-align: center;
    opacity: .7
}

.sidebar-footer {
    padding: 20px 15px;
    border-top: var(--border-glass);
    flex-shrink: 0;
    background: hsla(var(--base-hue), 15%, 15%, .3)
}

.control-group {
    margin-bottom: 18px
}

.control-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: .9rem;
    font-weight: 500;
    margin-bottom: 8px
}

.chat-area,
.chat-header h2 {
    overflow: hidden;
    flex-grow: 1
}

.control-group label i {
    font-size: 1.1em;
    color: var(--text-accent)
}

.control-group select {
    width: 100%;
    padding: 10px 12px;
    border-radius: var(--border-radius-sm);
    border: var(--border-glass);
    background-color: hsla(var(--base-hue), 15%, 25%, .5);
    color: var(--text-primary);
    font-size: .95rem;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='%238b949e' viewBox='0 0 16 16'%3E%3Cpath fill-rule='evenodd' d='M4.646 5.646a.5.5 0 0 1 .708 0L8 8.293l2.646-2.647a.5.5 0 0 1 .708.708l-3 3a.5.5 0 0 1-.708 0l-3-3a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 16px 16px;
    transition: border-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease
}

.control-group select:focus {
    outline: 0;
    border-color: hsla(var(--accent-hue), 70%, 50%, .6);
    box-shadow: 0 0 0 2px hsla(var(--accent-hue), 70%, 50%, .3)
}

.footer-branding {
    text-align: center;
    font-size: .8rem;
    opacity: .6;
    margin-top: 10px
}

.chat-area {
    flex-direction: column;
    background: 0 0
}

.chat-header {
    height: var(--header-height);
    flex-shrink: 0;
    background: var(--bg-secondary);
    border-bottom: var(--border-glass);
    display: flex;
    align-items: center;
    padding: 0 25px;
    padding-top: var(--safe-area-inset-top);
    box-shadow: var(--shadow-sm);
    z-index: 50
}

.sidebar-toggle-btn {
    display: none;
    background: 0 0;
    border: none;
    font-size: 1.6rem;
    cursor: pointer;
    margin-right: 20px;
    padding: 8px;
    border-radius: 50%;
    transition: color var(--transition-speed) ease, background-color var(--transition-speed) ease
}

.message-avatar,
.message-content {
    background: var(--bg-tertiary);
    box-shadow: var(--shadow-sm)
}

.sidebar-toggle-btn:hover {
    color: var(--text-primary);
    background-color: var(--bg-hover)
}

.chat-header h2 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    text-overflow: ellipsis;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, .3)
}

.header-actions {
    display: flex;
    gap: 15px
}

.message-list {
    flex-grow: 1;
    overflow-y: auto;
    padding: 30px 25px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    min-height: 0
}

.message {
    display: flex;
    max-width: 78%;
    align-items: flex-start;
    gap: 15px;
    opacity: 0;
    transform: translateY(10px);
    animation: .4s forwards fadeInMessage
}

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

.message.user {
    align-self: flex-end;
    flex-direction: row-reverse
}

.message.model {
    align-self: flex-start
}

.message.error {
    align-self: stretch;
    max-width: 100%
}

.message-avatar {
    width: var(--avatar-size);
    height: var(--avatar-size);
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    border: var(--border-glass)
}

.message.user .message-avatar {
    background: var(--accent-gradient);
    color: var(--text-on-accent-bg);
    border: none;
    box-shadow: var(--shadow-sm), 0 0 5px hsla(var(--accent-hue), 75%, 55%, .3)
}

.message.model .message-avatar {
    background: hsla(var(--base-hue), 20%, 30%, .7);
    color: var(--text-primary)
}

.message.error .message-avatar {
    background: hsla(0, 70%, 50%, .7);
    color: var(--text-on-accent-bg);
    border: 1px solid hsla(0, 70%, 50%, .9)
}

.message.user .message-avatar i::before {
    content: "\f007"
}

.message.model .message-avatar i::before {
    content: "\f135"
}

.message.error .message-avatar i::before {
    content: "\f071"
}

.welcome-message .message-avatar i::before {
    content: "\f0d0"
}

.message .message-avatar i::before {
    font-family: "Font Awesome 6 Free";
    font-weight: 900
}

.message-content {
    padding: 12px 18px;
    border-radius: var(--border-radius-lg);
    color: var(--text-primary);
    word-wrap: break-word;
    overflow-wrap: break-word;
    line-height: 1.65;
    backdrop-filter: blur(calc(var(--blur-amount)/ 2)) saturate(110%);
    border: var(--border-glass);
    overflow: hidden;
    position: relative
}

.code-block-default,
.message-content .text-content-inner pre {
    background-color: var(--bg-code-fallback);
    color: var(--text-code-fallback)
}

.message.user .message-content {
    background: hsla(var(--accent-hue), 70%, 50%, .2);
    border: 1px solid hsla(var(--accent-hue), 70%, 50%, .3);
    color: var(--text-primary);
    border-bottom-right-radius: var(--border-radius-sm)
}

.message.model .message-content {
    border-bottom-left-radius: var(--border-radius-sm)
}

.text-content-inner {
    display: block;
    word-wrap: break-word;
    overflow-wrap: break-word
}

.message-content .text-content-inner p {
    margin-bottom: .8em;
    word-wrap: break-word;
    overflow-wrap: break-word;
    white-space: pre-wrap
}

.message-content .text-content-inner :last-child,
.message-content .text-content-inner p:last-child {
    margin-bottom: 0
}

.message-content .text-content-inner p:empty {
    min-height: .5em;
    margin-bottom: .2em
}

.message-content .text-content-inner br {
    display: block;
    content: "";
    margin-top: .5em
}

.message.error .message-content {
    background: hsla(0, 80%, 70%, .1);
    border: 1px solid hsla(0, 80%, 70%, .3);
    color: var(--text-error)
}

.message.error .text-content-inner,
.message.error .text-content-inner p,
.message.error .text-content-inner strong {
    color: var(--text-error) !important
}

.message-content .text-content-inner :first-child {
    margin-top: 0
}

.message-content .text-content-inner h1,
.message-content .text-content-inner h2,
.message-content .text-content-inner h3,
.message-content .text-content-inner h4,
.message-content .text-content-inner h5,
.message-content .text-content-inner h6 {
    margin-top: 1.2em;
    margin-bottom: .6em;
    font-weight: 600;
    line-height: 1.3
}

.message-content .text-content-inner pre,
.message-content .text-content-inner pre code.hljs {
    overflow-x: auto;
    margin: 1em 0;
    white-space: pre;
    word-wrap: normal;
    font-family: var(--font-family-code)
}

.message-content .text-content-inner h1 {
    font-size: 1.6em
}

.message-content .text-content-inner h2 {
    font-size: 1.4em
}

.message-content .text-content-inner h3 {
    font-size: 1.2em
}

.message-content .text-content-inner pre code.hljs {
    display: block;
    padding: 1em;
    border-radius: var(--border-radius-md);
    border: var(--border-glass);
    font-size: .9em
}

.message-content .text-content-inner pre {
    padding: 15px;
    border-radius: var(--border-radius-md);
    font-size: .9em;
    border: var(--border-glass)
}

.message-content .text-content-inner pre code {
    background: 0 0;
    padding: 0;
    border-radius: 0;
    border: none;
    color: inherit;
    font-size: inherit;
    font-family: inherit;
    white-space: inherit;
    word-wrap: inherit;
    display: block
}

.code-block-default {
    white-space: pre-wrap !important;
    word-wrap: break-word !important
}

.code-block-error {
    border: 1px solid var(--text-error) !important;
    background-color: hsla(0, 80%, 70%, .1) !important
}

.message-content .text-content-inner code:not(.hljs) {
    background-color: hsla(var(--accent-hue), 30%, 50%, .2);
    padding: 3px 6px;
    border-radius: var(--border-radius-sm);
    font-family: var(--font-family-code);
    font-size: .9em;
    color: var(--text-accent);
    border: 1px solid hsla(var(--accent-hue), 30%, 50%, .3);
    word-wrap: break-word;
    white-space: normal
}

.message-content .text-content-inner ol,
.message-content .text-content-inner ul {
    margin-left: 25px;
    margin-top: .5em;
    margin-bottom: .8em;
    padding-left: 1em
}

.message-content .text-content-inner li::marker {
    color: var(--text-accent)
}

.message-content .text-content-inner li {
    margin-bottom: .3em
}

.message-content .text-content-inner ol ol,
.message-content .text-content-inner ol ul,
.message-content .text-content-inner ul ol,
.message-content .text-content-inner ul ul {
    margin-top: .2em;
    margin-bottom: .4em
}

.message-content .text-content-inner blockquote {
    border-left: 4px solid hsla(var(--accent-hue), 50%, 60%, .4);
    margin: 1em 0 1em 5px;
    padding-left: 1em;
    color: var(--text-secondary);
    font-style: italic
}

.message-content .text-content-inner blockquote p {
    margin-bottom: .5em
}

.message-content .text-content-inner b,
.message-content .text-content-inner strong {
    font-weight: 600;
    color: var(--text-primary)
}

.message-content .text-content-inner a {
    color: var(--text-accent);
    text-decoration: none;
    border-bottom: 1px solid hsla(var(--accent-hue), 80%, 60%, .5);
    transition: border-color var(--transition-speed) ease, color var(--transition-speed) ease
}

.message-content .text-content-inner a:hover {
    color: hsl(var(--accent-hue), 80%, 70%);
    border-bottom-color: hsl(var(--accent-hue), 80%, 70%)
}

.message-content .text-content-inner hr {
    border: none;
    border-top: 1px solid var(--bg-glass-edge);
    margin: 1.5em 0
}

.message-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius-md);
    margin-top: 10px;
    margin-bottom: 5px;
    border: var(--border-glass);
    box-shadow: var(--shadow-sm);
    display: block
}

.message.user .message-content img {
    max-height: 200px;
    max-width: 300px;
    border: 2px solid hsla(var(--accent-hue), 75%, 55%, .4)
}

.welcome-message {
    align-self: stretch;
    max-width: 70%;
    margin: 20px auto;
    text-align: center
}

.welcome-message .message-content {
    background: hsla(var(--base-hue), 20%, 18%, .7);
    border: var(--border-glass);
    box-shadow: var(--shadow-md);
    padding: 25px 30px;
    text-align: left
}

.welcome-message .message-avatar {
    background: var(--accent-gradient);
    color: var(--text-on-accent-bg);
    border: none;
    box-shadow: var(--shadow-sm), 0 0 8px hsla(var(--accent-hue), 75%, 55%, .3);
    margin: 0 auto 15px
}

.welcome-message .message-avatar i {
    font-size: 1.3em
}

.welcome-message p i {
    color: var(--text-accent);
    margin: 0 2px
}

.welcome-message strong {
    color: var(--text-accent);
    font-weight: 600
}

.send-btn,
.welcome-message a {
    color: var(--text-accent)
}

.welcome-message a:hover {
    color: hsl(var(--accent-hue), 80%, 70%)
}

.chat-input-area {
    padding: 15px 25px;
    padding-bottom: calc(15px + var(--safe-area-inset-bottom));
    border-top: var(--border-glass);
    background: var(--bg-secondary);
    backdrop-filter: blur(var(--blur-amount)) saturate(120%);
    box-shadow: 0 -3px 10px rgba(0, 0, 0, .2);
    flex-shrink: 0
}

.chat-form,
.image-preview-container {
    display: flex;
    background-color: hsla(var(--base-hue), 15%, 25%, .5)
}

.image-preview-container {
    margin-bottom: 12px;
    padding: 10px;
    border-radius: var(--border-radius-md);
    border: var(--border-glass);
    align-items: center;
    gap: 12px;
    animation: .3s forwards fadeInMessage
}

.image-preview-container.hidden {
    display: none
}

.image-preview-container img {
    max-height: 55px;
    max-width: 90px;
    border-radius: var(--border-radius-sm);
    border: var(--border-glass);
    margin: 0
}

.image-preview-container button {
    background: hsla(0, 0%, 100%, .1);
    color: var(--text-secondary);
    border: var(--border-glass);
    border-radius: 50%;
    width: 24px;
    height: 24px;
    cursor: pointer;
    font-size: 1rem;
    line-height: 22px;
    text-align: center;
    transition: all var(--transition-speed) ease;
    font-weight: 700;
    padding: 0
}

.image-preview-container button:hover {
    background: hsla(0, 80%, 70%, .2);
    color: var(--text-error);
    border-color: hsla(0, 80%, 70%, .5);
    transform: scale(1.1)
}

.chat-form {
    align-items: flex-end;
    border-radius: var(--border-radius-lg);
    padding: 8px;
    border: var(--border-glass);
    transition: border-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease
}

.chat-form:focus-within {
    border-color: hsla(var(--accent-hue), 70%, 50%, .6);
    box-shadow: 0 0 0 2px hsla(var(--accent-hue), 70%, 50%, .3), var(--shadow-glow)
}

.chat-form textarea {
    flex-grow: 1;
    border: none;
    background: 0 0;
    color: var(--text-primary);
    font-size: 1rem;
    resize: none;
    max-height: 180px;
    overflow-y: auto;
    padding: 12px 10px;
    outline: 0;
    line-height: 1.5;
    scrollbar-width: thin;
    scrollbar-color: hsla(var(--accent-hue), 60%, 50%, 0.5) transparent;
    white-space: pre-wrap;
    word-wrap: break-word
}

.chat-form textarea::-webkit-scrollbar {
    width: 6px
}

.chat-form textarea::-webkit-scrollbar-thumb {
    background-color: hsla(var(--accent-hue), 60%, 50%, .5);
    border-radius: 6px
}

.chat-form textarea::-webkit-scrollbar-track {
    background: 0 0
}

.chat-form textarea::placeholder {
    color: var(--text-secondary);
    opacity: .7
}

.input-button {
    background: 0 0;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 10px 12px;
    border-radius: var(--border-radius-md);
    transition: all var(--transition-speed) ease;
    align-self: center;
    margin: 0 3px
}

.input-button:hover:not(:disabled) {
    color: var(--text-accent);
    background-color: hsla(var(--accent-hue), 70%, 50%, .15)
}

.input-button:disabled {
    color: hsla(var(--base-hue), 10%, 50%, .6);
    cursor: not-allowed;
    background-color: transparent
}

.send-btn:hover:not(:disabled) {
    color: var(--text-on-accent-bg);
    background-color: var(--accent-primary);
    box-shadow: var(--shadow-glow)
}

.send-btn:disabled {
    color: hsla(var(--accent-hue), 70%, 50%, .4);
    background: 0 0;
    box-shadow: none
}

@media (max-width:768px) {

    .sidebar,
    .sidebar-overlay {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0
    }

    :root {
        --sidebar-width: 85%;
        --header-height: 60px;
        --blur-amount: 6px
    }

    .sidebar {
        transform: translateX(-105%);
        border-right: none;
        box-shadow: var(--shadow-lg);
        z-index: 1000;
        padding-left: var(--safe-area-inset-left);
        padding-right: var(--safe-area-inset-right)
    }

    .sidebar.open {
        transform: translateX(0)
    }

    .sidebar-overlay {
        right: 0;
        background: rgba(0, 0, 0, .4);
        backdrop-filter: blur(2px);
        z-index: 999;
        opacity: 0;
        visibility: hidden;
        transition: opacity var(--transition-speed) ease, visibility var(--transition-speed) ease
    }

    .sidebar-overlay.active {
        opacity: 1;
        visibility: visible
    }

    .sidebar-toggle-btn {
        display: block
    }

    .chat-area {
        width: 100%
    }

    .message-list {
        padding: 20px 15px
    }

    .message {
        max-width: 90%;
        gap: 10px
    }

    .message-content {
        padding: 10px 15px
    }

    .chat-input-area {
        padding: 12px 15px;
        padding-bottom: calc(12px + var(--safe-area-inset-bottom))
    }

    .chat-form {
        padding: 6px
    }

    .input-button {
        padding: 8px 10px;
        font-size: 1.4rem
    }

    .chat-form textarea {
        padding: 10px 8px
    }

    .chat-header {
        height: var(--header-height);
        padding: 0 15px;
        padding-top: var(--safe-area-inset-top);
        box-sizing: border-box
    }

    .chat-header h2 {
        font-size: 1.1rem
    }
}

.hidden {
    display: none !important
}