/* AI Chat Widget Styles */

.chat-fab {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: transparent;
    border: none;
    cursor: pointer;
    box-shadow: none;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    padding: 0;
    overflow: hidden;
}

.chat-fab:hover {
    transform: scale(1.08);
}

.chat-fab img {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    object-fit: cover;
}

.chat-fab svg {
    width: 26px;
    height: 26px;
    fill: #fff;
}

.chat-fab.open .chat-fab-icon-chat {
    display: none;
}

.chat-fab.open .chat-fab-icon-close {
    display: block;
}

.chat-fab.open {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    box-shadow: 0 4px 20px rgba(212, 175, 55, 0.3);
}

.chat-fab .chat-fab-icon-close {
    display: none;
}

/* Chat Panel */
.chat-panel {
    position: fixed;
    bottom: 92px;
    right: 24px;
    width: 380px;
    height: 520px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    z-index: 999;
    opacity: 0;
    transform: translateY(20px) scale(0.95);
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
    overflow: hidden;
}

.chat-panel.visible {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

/* Header */
.chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-surface);
}

.chat-header-title {
    font-family: var(--font-serif);
    font-size: 15px;
    font-weight: 700;
    color: var(--color-primary);
}

.chat-new-btn {
    background: none;
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 12px;
    padding: 4px 10px;
    border-radius: 6px;
    cursor: pointer;
    transition: color var(--transition-base), border-color var(--transition-base);
}

.chat-new-btn:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
}

/* Messages Area */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.chat-messages::-webkit-scrollbar {
    width: 4px;
}

.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 2px;
}

/* Message Bubbles */
.chat-msg {
    max-width: 88%;
    padding: 10px 14px;
    border-radius: 12px;
    font-size: 14px;
    line-height: 1.6;
    word-break: break-word;
}

.chat-msg-text {
    white-space: pre-wrap;
}

.chat-msg-text strong {
    color: var(--color-primary);
    font-weight: 600;
}

.chat-msg-user {
    align-self: flex-end;
    background: var(--color-primary);
    color: var(--color-bg);
    border-bottom-right-radius: 4px;
}

.chat-msg-assistant {
    align-self: flex-start;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    border-bottom-left-radius: 4px;
}

.chat-msg-sources {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-top: 8px;
}

.chat-source-tag {
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 10px;
    background: rgba(212, 175, 55, 0.12);
    color: var(--color-primary);
    border: 1px solid rgba(212, 175, 55, 0.25);
}

/* Welcome Message */
.chat-welcome {
    text-align: center;
    padding: 24px 16px;
    color: var(--color-text-muted);
    font-size: 13px;
    line-height: 1.8;
}

.chat-welcome-title {
    font-family: var(--font-serif);
    font-size: 16px;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.chat-welcome-hints {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-top: 12px;
}

.chat-hint-btn {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 13px;
    cursor: pointer;
    text-align: left;
    transition: border-color var(--transition-base);
}

.chat-hint-btn:hover {
    border-color: var(--color-primary);
}

/* Typing Indicator */
.chat-typing {
    align-self: flex-start;
    padding: 10px 14px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    border-bottom-left-radius: 4px;
    display: none;
}

.chat-typing.visible {
    display: flex;
}

.chat-typing-dot {
    width: 6px;
    height: 6px;
    background: var(--color-text-muted);
    border-radius: 50%;
    margin: 0 2px;
    animation: chatTyping 1.2s infinite;
}

.chat-typing-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.chat-typing-dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes chatTyping {
    0%, 60%, 100% { opacity: 0.3; transform: translateY(0); }
    30% { opacity: 1; transform: translateY(-4px); }
}

/* Input Area */
.chat-input-area {
    display: flex;
    align-items: flex-end;
    padding: 12px 16px;
    border-top: 1px solid var(--color-border);
    background: var(--color-surface);
    gap: 8px;
}

.chat-input {
    flex: 1;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    padding: 10px 14px;
    border-radius: 10px;
    font-size: 14px;
    font-family: var(--font-sans);
    resize: none;
    min-height: 40px;
    max-height: 100px;
    line-height: 1.4;
    outline: none;
    transition: border-color var(--transition-base);
}

.chat-input:focus {
    border-color: var(--color-primary);
}

.chat-input::placeholder {
    color: var(--color-text-muted);
}

.chat-send-btn {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--color-primary);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity var(--transition-base);
    flex-shrink: 0;
}

.chat-send-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.chat-send-btn svg {
    width: 18px;
    height: 18px;
    fill: var(--color-bg);
}

/* Login prompt */
.chat-login-prompt {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    padding: 32px;
    text-align: center;
}

.chat-login-prompt p {
    color: var(--color-text-muted);
    margin-bottom: 16px;
    font-size: 14px;
}

.chat-login-btn {
    background: var(--color-primary);
    color: var(--color-bg);
    border: none;
    padding: 10px 28px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: opacity var(--transition-base);
}

.chat-login-btn:hover {
    opacity: 0.9;
}

/* Mobile: full-screen chat */
@media (max-width: 480px) {
    .chat-panel {
        bottom: 0;
        right: 0;
        width: 100%;
        height: 100%;
        border-radius: 0;
        border: none;
    }

    .chat-fab {
        bottom: 16px;
        right: 16px;
        width: 50px;
        height: 50px;
    }

    .chat-fab img {
        width: 50px;
        height: 50px;
    }

    .chat-fab svg {
        width: 22px;
        height: 22px;
    }
}