/* ===== Chat widget: Gemini-in-Google-Colab–inspired (self-contained dark theme) ===== */
.chat-widget {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    /* Above .l-header (1000); below sitewide overlays (e.g. 9999) */
    z-index: 1100;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    font-family: ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    pointer-events: none;
}

.chat-widget * {
    box-sizing: border-box;
}

/* Toggle + hover hint */
.chat-toggle-wrap {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    pointer-events: auto;
}

.chat-toggle-hint {
    position: absolute;
    right: calc(100% + 12px);
    top: 50%;
    transform: translateY(-50%) translateX(8px);
    padding: 0.5rem 0.85rem;
    background: #2d2d2d;
    color: #e8eaed;
    font-size: 0.8125rem;
    font-weight: 500;
    line-height: 1.3;
    border-radius: 10px;
    border: 1px solid #5f6368;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.22s ease, transform 0.22s ease, visibility 0.22s;
    z-index: 2;
}

.chat-toggle-hint::after {
    content: '';
    position: absolute;
    right: -6px;
    top: 50%;
    transform: translateY(-50%);
    border: 6px solid transparent;
    border-left-color: #5f6368;
}

.chat-toggle-wrap:hover .chat-toggle-hint,
.chat-toggle-wrap:focus-within .chat-toggle-hint {
    opacity: 1;
    visibility: visible;
    transform: translateY(-50%) translateX(0);
}

.chat-toggle-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: #303030;
    color: #8ab4f8;
    border: 1px solid #5f6368;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.chat-toggle-btn:hover {
    transform: scale(1.06);
    background: #3c4043;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.45);
}

.sparkle-icon {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sparkle-icon svg {
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 0 6px rgba(138, 180, 248, 0.45));
}

/* Window */
.chat-window {
    width: 400px;
    height: 560px;
    background: #1e1e1e;
    border-radius: 16px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    margin-bottom: 1rem;
    opacity: 0;
    transform: translateY(16px) scale(0.97);
    pointer-events: none;
    transition: opacity 0.28s ease, transform 0.28s ease;
    border: 1px solid #3c4043;
    position: relative;
    min-width: 300px;
    min-height: 400px;
    max-width: 90vw;
    max-height: 80vh;
    color: #e8eaed;
}

.chat-window.active {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: all;
}

/* Resize handles */
.resizer {
    position: absolute;
    z-index: 10;
}

.resizer-t {
    top: 0;
    left: 0;
    width: 100%;
    height: 8px;
    cursor: ns-resize;
    background: transparent;
}

.resizer-l {
    top: 0;
    left: 0;
    width: 8px;
    height: 100%;
    cursor: ew-resize;
    background: transparent;
}

.resizer-tl {
    top: 0;
    left: 0;
    width: 12px;
    height: 12px;
    cursor: nwse-resize;
    background: transparent;
    z-index: 11;
}

/* Header */
.chat-header {
    background: #252525;
    color: #e8eaed;
    padding: 0.85rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #3c4043;
    cursor: move;
    user-select: none;
    flex-shrink: 0;
}

.chat-header__title {
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: 0.01em;
}

.chat-close-btn {
    background: transparent;
    border: none;
    color: #9aa0a6;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease;
    font-size: 0.95rem;
    pointer-events: auto;
}

.chat-close-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #e8eaed;
}

/* Scroll area */
.chat-messages {
    flex: 1;
    padding: 1rem 1rem 0.75rem;
    overflow-y: auto;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    background: #1e1e1e;
    scroll-behavior: smooth;
    min-height: 0;
    scrollbar-width: thin;
    scrollbar-color: #5f6368 #1e1e1e;
}

.chat-messages::-webkit-scrollbar {
    width: 8px;
}

.chat-messages::-webkit-scrollbar-track {
    background: #1e1e1e;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: #5f6368;
    border-radius: 4px;
}

/* Turns (no bubbles — icon + text like Gemini) */
.chat-turn {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
    max-width: 100%;
}

.chat-turn__avatar {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
}

.chat-turn--user .chat-turn__avatar {
    background: linear-gradient(145deg, #3949ab, #5c6bc0);
    color: #fff;
    box-shadow: 0 0 0 2px rgba(138, 180, 248, 0.25);
}

.chat-turn__avatar--bot {
    background: transparent;
    color: #8ab4f8;
    width: 28px;
    height: 28px;
    box-shadow: none;
}

.chat-sparkle {
    width: 22px;
    height: 22px;
    display: block;
}

.chat-turn__body {
    flex: 1;
    min-width: 0;
}

.chat-turn__content {
    font-size: 0.9375rem;
    line-height: 1.55;
    color: #e8eaed;
    word-wrap: break-word;
}

.chat-turn__content--user {
    white-space: pre-wrap;
}

.chat-turn__content.streaming {
    position: relative;
}

.chat-turn__content.streaming::after {
    content: '';
    display: inline-block;
    width: 0.4em;
    height: 1em;
    margin-left: 2px;
    vertical-align: text-bottom;
    background: #8ab4f8;
    opacity: 0.65;
    animation: chat-stream-cursor 0.9s ease-in-out infinite;
}

@keyframes chat-stream-cursor {

    0%,
    40% {
        opacity: 0.65;
    }

    50%,
    100% {
        opacity: 0.15;
    }
}

.chat-turn__feedback {
    display: flex;
    gap: 0.35rem;
    margin-top: 0.5rem;
    align-items: center;
}

.chat-feedback-btn {
    background: transparent;
    border: 1px solid #5f6368;
    color: #9aa0a6;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.chat-feedback-btn:hover {
    background: rgba(138, 180, 248, 0.12);
    color: #8ab4f8;
    border-color: #8ab4f8;
}

.chat-feedback-btn.is-active {
    background: rgba(138, 180, 248, 0.2);
    color: #8ab4f8;
    border-color: #8ab4f8;
}

/* Footer: suggestions + composer */
.chat-footer {
    flex-shrink: 0;
    padding: 0.65rem 0.85rem 0.85rem;
    background: #1e1e1e;
    border-top: 1px solid #3c4043;
}

.chat-suggestions {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    margin-bottom: 0.65rem;
}

.chat-suggestion-chip {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    text-align: left;
    padding: 0.5rem 0.75rem;
    border-radius: 999px;
    border: 1px solid #5f6368;
    background: #2d2d2d;
    color: #8ab4f8;
    font-size: 0.8125rem;
    cursor: pointer;
    transition: background 0.15s ease, border-color 0.15s ease;
}

.chat-suggestion-chip i {
    color: #9aa0a6;
    font-size: 0.75rem;
    transform: scaleX(-1);
    flex-shrink: 0;
}

.chat-suggestion-chip:hover {
    background: #353535;
    border-color: #8ab4f8;
}

.chat-suggestion-chip span {
    color: #8ab4f8;
    line-height: 1.35;
}

/* Composer “prompt box” */
.chat-composer {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.65rem;
    background: #2d2d2d;
    border: 2px solid #8ab4f8;
    border-radius: 14px;
}

.chat-composer__leading {
    display: flex;
    align-items: center;
    gap: 0.15rem;
    flex-shrink: 0;
}

.chat-composer__icon-btn {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 10px;
    background: transparent;
    color: #9aa0a6;
    cursor: not-allowed;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    opacity: 0.55;
}

.chat-composer__input {
    flex: 1;
    min-width: 0;
    border: none;
    background: transparent;
    outline: none;
    color: #e8eaed;
    font-family: inherit;
    font-size: 0.9375rem;
    padding: 0.35rem 0.25rem;
}

.chat-composer__input::placeholder {
    color: #9aa0a6;
}

.chat-composer__input:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

.chat-composer__trailing {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    flex-shrink: 0;
}

.chat-composer__model {
    font-size: 0.75rem;
    color: #e8eaed;
    padding: 0.35rem 0.6rem;
    border-radius: 8px;
    border: 1px solid #5f6368;
    background: #353535;
    max-width: 130px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    user-select: none;
}

.chat-composer__send {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 10px;
    background: transparent;
    color: #9aa0a6;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    transition: color 0.15s ease, background 0.15s ease;
}

.chat-composer__send:not(:disabled) {
    color: #8ab4f8;
}

.chat-composer__send:not(:disabled):hover {
    background: rgba(138, 180, 248, 0.15);
}

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

.chat-disclaimer {
    margin: 0.55rem 0 0;
    text-align: center;
    font-size: 0.6875rem;
    line-height: 1.45;
    color: #9aa0a6;
}

.chat-disclaimer a {
    color: #8ab4f8;
    text-decoration: none;
}

.chat-disclaimer a:hover {
    text-decoration: underline;
}

/* Typing indicator (bot row) */
.chat-turn--typing .typing-indicator {
    margin: 0;
}

.typing-indicator {
    display: flex;
    gap: 0.35rem;
    padding: 0.35rem 0;
    align-items: center;
    width: fit-content;
}

.typing-dot {
    width: 6px;
    height: 6px;
    background: #8ab4f8;
    border-radius: 50%;
    animation: chat-typing-bounce 1.2s infinite ease-in-out;
}

.typing-dot:nth-child(1) {
    animation-delay: -0.24s;
}

.typing-dot:nth-child(2) {
    animation-delay: -0.12s;
}

@keyframes chat-typing-bounce {

    0%,
    80%,
    100% {
        transform: scale(0.55);
        opacity: 0.5;
    }

    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Markdown inside bot content */
.chat-turn__content p {
    margin: 0 0 0.5rem;
}

.chat-turn__content p:last-child {
    margin-bottom: 0;
}

.chat-turn__content strong {
    font-weight: 700;
    color: #e8eaed;
}

.chat-turn__content em {
    font-style: italic;
}

.chat-turn__content ul,
.chat-turn__content ol {
    margin: 0.35rem 0 0.5rem;
    padding-left: 1.25rem;
}

.chat-turn__content li {
    margin-bottom: 0.2rem;
}

.chat-turn__content a {
    color: #8ab4f8;
    text-decoration: underline;
}

.chat-turn__content a:hover {
    color: #aecbfa;
}

.chat-turn__content h1,
.chat-turn__content h2,
.chat-turn__content h3,
.chat-turn__content h4 {
    margin: 0.65rem 0 0.35rem;
    font-weight: 600;
    font-size: 1.05em;
    color: #e8eaed;
}

.chat-turn__content blockquote {
    border-left: 3px solid #8ab4f8;
    padding-left: 0.75rem;
    margin: 0.5rem 0;
    color: #bdc1c6;
    font-style: italic;
}

.chat-turn__content code {
    background: rgba(255, 255, 255, 0.08);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-family: ui-monospace, 'Cascadia Code', 'Segoe UI Mono', monospace;
    font-size: 0.88em;
    color: #fdd663;
}

.chat-turn__content pre {
    background: #121212;
    color: #e8eaed;
    padding: 0.75rem;
    border-radius: 10px;
    overflow-x: auto;
    margin: 0.5rem 0;
    font-size: 0.85em;
    border: 1px solid #3c4043;
}

.chat-turn__content pre code {
    background: transparent;
    padding: 0;
    color: inherit;
}

/* Mobile */
@media screen and (max-width: 576px) {
    .chat-widget {
        right: 1rem;
        bottom: 1rem;
    }

    .chat-window {
        width: calc(100vw - 2rem) !important;
        height: 72vh !important;
        position: fixed;
        bottom: 5rem;
        right: 1rem;
        left: 1rem;
        margin-bottom: 0;
        border-radius: 14px;
    }

    .resizer {
        display: none;
    }

    .chat-header {
        cursor: default;
    }

    .chat-suggestions {
        max-height: 88px;
        overflow-y: auto;
    }

    /* Tooltip above FAB so it is not clipped at the left edge */
    .chat-toggle-hint {
        right: auto;
        left: 50%;
        top: auto;
        bottom: calc(100% + 10px);
        transform: translateX(-50%) translateY(6px);
    }

    .chat-toggle-wrap:hover .chat-toggle-hint,
    .chat-toggle-wrap:focus-within .chat-toggle-hint {
        transform: translateX(-50%) translateY(0);
    }

    .chat-toggle-hint::after {
        right: auto;
        left: 50%;
        top: 100%;
        transform: translateX(-50%);
        border: 6px solid transparent;
        border-top-color: #5f6368;
        border-left-color: transparent;
    }
}