:root {
    --primary: #2b7cee;
    --primary-glow: rgba(43, 124, 238, 0.2);
    --sidebar-bg: #111822;
    --user-bubble-bg: #0f172a;
    --ai-bubble-bg: transparent;
    --code-bg: #1e293b;
}

.material-symbols-outlined {
    font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

.glass-sidebar {
    background: var(--sidebar-bg);
    border-right: 1px solid #233348;
}

.custom-scrollbar::-webkit-scrollbar {
    width: 4px;
}
.custom-scrollbar::-webkit-scrollbar-track {
    background: transparent;
}
.custom-scrollbar::-webkit-scrollbar-thumb {
    background: #233348;
    border-radius: 10px;
}
.custom-scrollbar::-webkit-scrollbar-thumb:hover {
    background: #334155;
}

.user-bubble {
    background: var(--user-bubble-bg);
}
.ai-bubble {
    background: var(--ai-bubble-bg);
}
.vibrant-gradient {
    background: linear-gradient(135deg, #2b7cee 0%, #246bd4 100%);
    background-size: 200% auto;
}

.message {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    width: 100%;
    max-width: 56rem;
    margin-left: auto;
    margin-right: auto;
}
.message.bot {
    justify-content: flex-start;
}
.message.user {
    flex-direction: row-reverse;
    justify-content: flex-start;
}
.message .avatar {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 0.5rem;
    display: grid;
    place-items: center;
    flex-shrink: 0;
    font-weight: 700;
    font-size: 0.75rem;
}
.message.bot .avatar {
    color: var(--primary);
    background: rgba(43, 124, 238, 0.2);
    border: 1px solid rgba(43, 124, 238, 0.3);
}
.message.user .avatar {
    background: #0f172a;
    color: #94a3b8;
    border: 1px solid #233348;
}
.avatar-bot {
    background: radial-gradient(circle at 30% 30%, rgba(43, 124, 238, 0.6), rgba(43, 124, 238, 0.1));
}
.avatar-user {
    background: radial-gradient(circle at 30% 30%, rgba(148, 163, 184, 0.35), rgba(15, 23, 42, 0.9));
}
.message .bubble {
    max-width: 72%;
    padding: 0;
    border-radius: 1rem;
    border: none;
    box-shadow: none;
    line-height: 1.7;
    position: relative;
    padding-right: 1.5rem;
}
.message.bot .bubble {
    background: transparent;
    margin-right: auto;
}
.message.user .bubble {
    background: transparent;
    border: none;
    padding: 0;
    border-radius: 0;
    margin-left: auto;
    text-align: right;
}
.message-meta {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.875rem;
    color: #ffffff;
    text-transform: none;
    letter-spacing: 0.02em;
    margin-bottom: 0.5rem;
}
.message.user .message-meta {
    justify-content: flex-end;
    text-align: right;
}
.message-name {
    font-weight: 700;
    color: #ffffff;
}
.message.bot .message-name {
    font-family: "Bitcount Prop Single Ink", cursive;
    font-weight: 400;
    font-size: 1.2rem;
    letter-spacing: 0.02em;
}
.message-time {
    display: none;
}
.message-text {
    font-size: 0.98rem;
    color: #cbd5f5;
    line-height: 1.7;
    white-space: pre-wrap;
    word-break: break-word;
}
.message-text p {
    margin-bottom: 0.65rem;
}
.message-text p:last-child {
    margin-bottom: 0;
}
.message.user .message-text {
    color: #cbd5f5;
    text-align: right;
}

.chat-surface {
    background: #0f172a;
    -webkit-text-size-adjust: 100%;
    tab-size: 4;
    font-feature-settings: normal;
    font-variation-settings: normal;
    -webkit-tap-highlight-color: transparent;
    --primary: #2b7cee;
    --primary-glow: rgba(43, 124, 238, 0.2);
    --sidebar-bg: #111822;
    --user-bubble-gradient: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    --ai-bubble-gradient: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    --ai-bubble-gradient-dark: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    line-height: inherit;
    font-family: 'Plus Jakarta Sans', sans-serif;
    -webkit-font-smoothing: antialiased;
    --tw-bg-opacity: 1;
    --tw-text-opacity: 1;
    color: rgb(241 245 249 / var(--tw-text-opacity, 1));
    --tw-border-spacing-x: 0;
    --tw-border-spacing-y: 0;
    --tw-translate-x: 0;
    --tw-translate-y: 0;
    --tw-rotate: 0;
    --tw-skew-x: 0;
    --tw-skew-y: 0;
    --tw-scale-x: 1;
    --tw-scale-y: 1;
    --tw-pan-x: ;
    --tw-pan-y: ;
    --tw-pinch-zoom: ;
    --tw-scroll-snap-strictness: proximity;
    --tw-gradient-from-position: ;
    --tw-gradient-via-position: ;
    --tw-gradient-to-position: ;
    --tw-ordinal: ;
    --tw-slashed-zero: ;
    --tw-numeric-figure: ;
    --tw-numeric-spacing: ;
    --tw-numeric-fraction: ;
    --tw-ring-inset: ;
    --tw-ring-offset-width: 0px;
    --tw-ring-offset-color: #fff;
    --tw-ring-color: rgb(59 130 246 / 0.5);
    --tw-ring-offset-shadow: 0 0 #0000;
    --tw-ring-shadow: 0 0 #0000;
    --tw-shadow: 0 0 #0000;
    --tw-shadow-colored: 0 0 #0000;
    --tw-blur: ;
    --tw-brightness: ;
    --tw-contrast: ;
    --tw-grayscale: ;
    --tw-hue-rotate: ;
    --tw-invert: ;
    --tw-saturate: ;
    --tw-sepia: ;
    --tw-drop-shadow: ;
    --tw-backdrop-blur: ;
    --tw-backdrop-brightness: ;
    --tw-backdrop-contrast: ;
    --tw-backdrop-grayscale: ;
    --tw-backdrop-hue-rotate: ;
    --tw-backdrop-invert: ;
    --tw-backdrop-opacity: ;
    --tw-backdrop-saturate: ;
    --tw-backdrop-sepia: ;
    --tw-contain-size: ;
    --tw-contain-layout: ;
    --tw-contain-paint: ;
    --tw-contain-style: ;
    box-sizing: border-box;
    border-width: 0;
    border-style: solid;
    border-color: #e5e7eb;
    flex: 1 1 0%;
    overflow-y: auto;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
    padding-top: 2.5rem;
    padding-bottom: 2.5rem;
}

#chat-window {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.dark body {
    background: #101822;
    color: #e2e8f0;
    font-family: 'Inter', sans-serif;
}

@media (max-width: 1024px) {
    body {
        overflow: auto;
    }
    .app-shell {
        height: auto;
    }
    #mobile-sidebar {
        position: fixed;
        inset: 0;
        width: 100%;
        height: 100%;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }
    #mobile-sidebar.is-open {
        transform: translateX(0);
    }
    #mobile-sidebar-overlay.is-open {
        opacity: 1;
        pointer-events: auto;
    }
}

.bubble .timestamp {
    display: none;
}
.message-delete {
    position: absolute;
    top: 0.5rem;
    right: 0.75rem;
    background: transparent;
    border: none;
    color: inherit;
    opacity: 0.5;
    cursor: pointer;
}
.message-delete:hover {
    opacity: 0.9;
}

.code-block-wrap {
    position: relative;
    margin: 1rem 0;
    border-radius: 0.75rem;
    overflow: hidden;
    border: 1px solid #334155;
    background: var(--code-bg);
    --code-accent: #38bdf8;
    --code-font: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}
.code-block-wrap::before {
    content: '';
}
.code-toolbar {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.6rem 1rem;
    background: #0f172a;
    border-bottom: 1px solid #334155;
}
.code-toolbar .code-dots {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}
.code-toolbar .dot {
    width: 0.65rem;
    height: 0.65rem;
    border-radius: 999px;
}
.code-toolbar .dot.red { background: #ff5f56; }
.code-toolbar .dot.yellow { background: #ffbd2e; }
.code-toolbar .dot.green { background: #27c93f; }
.code-toolbar .code-label {
    margin-left: 0.75rem;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: #94a3b8;
    font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}
.code-toolbar .toolbar-actions {
    display: flex;
    gap: 0.35rem;
    align-items: center;
}
.image-block {
    margin: 1.25rem 0;
    border-radius: 0.75rem;
    overflow: hidden;
    border: 1px solid #334155;
    background: #0f172a;
}
.image-toolbar {
    display: flex;
    justify-content: flex-end;
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid #334155;
    background: #0f172a;
}
.image-download {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.55rem;
    border-radius: 0.4rem;
    border: none;
    background: transparent;
    color: #94a3b8;
    font-size: 0.7rem;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease;
}
.image-download:hover {
    background: #1f2937;
    color: #ffffff;
}
.image-block img {
    display: block;
    width: 100%;
    height: auto;
}
.code-toolbar button {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.55rem;
    border: none;
    border-radius: 0.4rem;
    background: transparent;
    color: #94a3b8;
    cursor: pointer;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: none;
    transition: background 0.15s ease, color 0.15s ease;
}
.code-toolbar button:hover {
    background: #1f2937;
    color: #ffffff;
}
.code-block-wrap:not([data-lang-key="json"]) .format-btn {
    opacity: 0.35;
    pointer-events: none;
}
.code-block-wrap .ai-code-block code {
    font-family: var(--code-font);
}
.ai-code-block {
    padding: 1.25rem;
    font-size: 0.85rem;
    line-height: 1.6;
    border-left: none;
    background: var(--code-bg);
    white-space: pre;
    overflow-x: auto;
}
.code-block-wrap.code-wrap .ai-code-block {
    white-space: pre-wrap;
}
.copy-btn {
    position: static;
    top: auto;
    right: auto;
    padding: 0;
    background: transparent;
}
.code-block-wrap.code-fullscreen {
    position: fixed;
    inset: 1.5rem;
    z-index: 1000;
    border-radius: 1.5rem;
    box-shadow: 0 35px 80px -30px rgba(15, 23, 42, 0.8);
}
.code-block-wrap.code-fullscreen .ai-code-block {
    height: calc(100vh - 8rem);
    overflow: auto;
}
body.code-overlay-open {
    overflow: hidden;
}

.code-lang-javascript { --code-accent: #f7df1e; --code-font: "Fira Code", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }
.code-lang-typescript { --code-accent: #3178c6; --code-font: "Fira Code", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }
.code-lang-python { --code-accent: #3776ab; --code-font: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }
.code-lang-php { --code-accent: #8892bf; --code-font: "Source Code Pro", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }
.code-lang-markdown { --code-accent: #10b981; --code-font: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }
.code-lang-html { --code-accent: #e34f26; --code-font: "Fira Code", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }
.code-lang-css { --code-accent: #264de4; --code-font: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }
.code-lang-json { --code-accent: #f59e0b; --code-font: "Source Code Pro", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }
.code-lang-bash { --code-accent: #22c55e; --code-font: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }
.code-lang-yaml { --code-accent: #f97316; --code-font: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }
.code-lang-sql { --code-accent: #a855f7; --code-font: "Source Code Pro", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }
.code-lang-go { --code-accent: #00add8; --code-font: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }
.code-lang-java { --code-accent: #e76f00; --code-font: "Source Code Pro", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }
.code-lang-c { --code-accent: #9ca3af; --code-font: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }
.code-lang-cpp { --code-accent: #0ea5e9; --code-font: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }
.code-lang-csharp { --code-accent: #a3e635; --code-font: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }
.code-lang-ruby { --code-accent: #ef4444; --code-font: "Source Code Pro", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }
.code-lang-xml { --code-accent: #fb7185; --code-font: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }
.code-lang-diff { --code-accent: #94a3b8; --code-font: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }

.attachment-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    background: rgba(59, 130, 246, 0.12);
    color: #1d4ed8;
    font-size: 0.75rem;
    font-weight: 600;
}
.dark .attachment-chip {
    background: rgba(59, 130, 246, 0.2);
    color: #bfdbfe;
}
.attachment-remove {
    background: transparent;
    border: none;
    color: inherit;
    cursor: pointer;
    font-size: 0.8rem;
}