/* =============================================
   THEME VARIABLES & BASE STYLES
   ============================================= */

:root {
    --chat-bg: #ffffff;
    --chat-border: #e5e7eb;
    --bubble-bg: #f3f4f6;
    --bubble-user-bg: #f3f4f6;
    --bubble-bot-bg: #f9fafb;
    --bubble-error-bg: #fef2f2;
    --bubble-error-border: #fecaca;
    --input-bg: #ffffff;
    --input-border: #d1d5db;
    --input-focus-border: #6b7280;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --welcome-bg: #f9fafb;
    --side-pane-bg: #ffffff;
}

[data-bs-theme="light"] body {
    background-color: #f8f9fa;
}

[data-bs-theme="dark"] {
    --chat-bg: #1f2937;
    --chat-border: #374151;
    --bubble-bg: #374151;
    --bubble-user-bg: #374151;
    --bubble-bot-bg: #1f2937;
    --bubble-error-bg: #450a0a;
    --bubble-error-border: #7f1d1d;
    --input-bg: #1f2937;
    --input-border: #4b5563;
    --input-focus-border: #9ca3af;
    --text-primary: #f3f4f6;
    --text-secondary: #d1d5db;
    --text-muted: #9ca3af;
    --welcome-bg: #374151;
    --side-pane-bg: #1f2937;
}

[data-bs-theme="dark"] body {
    background-color: #111827;
    color: #f3f4f6;
}

[data-bs-theme="dark"] .bg-light {
    background-color: var(--bubble-bg) !important;
    color: var(--text-primary) !important;
}

[data-bs-theme="dark"] .text-dark {
    color: var(--text-primary) !important;
}

/* =============================================
   CHAT CONTAINER & LAYOUT
   ============================================= */

.chat-main-container {
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

.chat-wrapper {
    height: calc(100vh - 80px);
    display: flex;
    gap: 0.5rem;
}

.chat-card {
    background: var(--chat-bg);
    border: 1px solid var(--chat-border);
    border-radius: 0.75rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

/* =============================================
   CHAT LOG (MESSAGE AREA)
   ============================================= */

#chat-log {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    overflow-y: auto;
    padding: 1.5rem;
    gap: 1rem;
}

/* =============================================
   MESSAGE BUBBLES
   ============================================= */

.message-bubble {
    padding: 0.875rem 1rem;
    border-radius: 1rem;
    max-width: 75%;
    width: auto;
    line-height: 1.5;
    color: var(--text-primary);
    background: var(--bubble-bg);
    box-shadow: var(--shadow-sm);
}

.message-bubble p {
    margin-bottom: 0.5rem;
}

.message-bubble p:last-child {
    margin-bottom: 0;
}

/* User messages - right aligned */
.user-bubble {
    align-self: flex-end;
    background: var(--bubble-user-bg);
    border-bottom-right-radius: 0.25rem;
}

/* Bot messages - left aligned */
.bot-bubble {
    align-self: flex-start;
    background: var(--bubble-bot-bg);
    border-bottom-left-radius: 0.25rem;
    min-width: 150px;
}

/* Error messages */
.error-bubble {
    align-self: flex-start;
    background: var(--bubble-error-bg);
    border: 1px solid var(--bubble-error-border);
    color: #991b1b;
}

[data-bs-theme="dark"] .error-bubble {
    color: #fca5a5;
}

/* Loading spinner bubble */
.spinner-bubble {
    align-self: flex-start;
    background: var(--bubble-bot-bg);
    padding: 1rem 1.5rem;
    border-radius: 1rem;
    border-bottom-left-radius: 0.25rem;
}

/* =============================================
   WELCOME MESSAGE BOX
   ============================================= */

.welcome-box {
    background: var(--welcome-bg);
    border: 1px solid var(--chat-border);
    border-radius: 0.75rem;
    padding: 1.25rem;
    width: 100%;
    color: var(--text-primary);
}

.welcome-box h6 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.welcome-box .text-muted {
    color: var(--text-muted) !important;
}

/* =============================================
   INPUT AREA
   ============================================= */

.chat-input-area {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--chat-border);
    background: var(--chat-bg);
}

.chat-input-group {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.chat-input {
    flex-grow: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--input-border);
    border-radius: 0.75rem;
    background: var(--input-bg);
    color: var(--text-primary);
    font-size: 0.9375rem;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.chat-input:focus {
    outline: none;
    border-color: var(--input-focus-border);
    box-shadow: 0 0 0 3px rgba(107, 114, 128, 0.1);
}

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

.chat-send-btn {
    padding: 0.75rem 1.25rem;
    border: none;
    border-radius: 0.75rem;
    background: #374151;
    color: #ffffff;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.15s ease;
}

.chat-send-btn:hover {
    background: #1f2937;
}

[data-bs-theme="dark"] .chat-send-btn {
    background: #4b5563;
}

[data-bs-theme="dark"] .chat-send-btn:hover {
    background: #6b7280;
}

/* =============================================
   SIDE PANE
   ============================================= */

.side-pane {
    width: 400px;
    min-width: 320px;
    display: none;
}

.side-pane.visible {
    display: block;
}

.side-pane-card {
    background: var(--side-pane-bg);
    border: 1px solid var(--chat-border);
    border-radius: 0.75rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

.side-pane-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--chat-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.side-pane-header h5 {
    margin: 0;
    font-weight: 600;
    color: var(--text-primary);
}

.side-pane-content {
    flex-grow: 1;
    overflow-y: auto;
    padding: 1rem;
}

/* =============================================
   ARTIFACT PILLS (SOURCE REFERENCES)
   ============================================= */

.artifact-pill {
    font-size: 0.8125rem;
    padding: 0.25rem 0.625rem;
    border-radius: 0.5rem;
    border: 1px solid var(--chat-border);
    background: var(--chat-bg);
    color: var(--text-secondary);
    cursor: pointer;
    transition: background-color 0.15s ease, border-color 0.15s ease;
}

.artifact-pill:hover {
    background: var(--bubble-bg);
    border-color: var(--input-focus-border);
}

/* =============================================
   SYNC BUTTON
   ============================================= */

.sync-btn {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    border-radius: 0.375rem;
}

/* =============================================
   FOOTER
   ============================================= */

.chat-footer {
    text-align: center;
    padding: 0.5rem;
    color: var(--text-muted);
    font-size: 0.6875rem;
}

/* =============================================
   SCROLLBAR STYLING
   ============================================= */

#chat-log::-webkit-scrollbar,
.side-pane-content::-webkit-scrollbar {
    width: 6px;
}

#chat-log::-webkit-scrollbar-track,
.side-pane-content::-webkit-scrollbar-track {
    background: transparent;
}

#chat-log::-webkit-scrollbar-thumb,
.side-pane-content::-webkit-scrollbar-thumb {
    background: var(--input-border);
    border-radius: 3px;
}

#chat-log::-webkit-scrollbar-thumb:hover,
.side-pane-content::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}