/* static/chat.css */
.chat-layout {
    display: flex;
    height: calc(100vh - 70px);
    gap: 0;
    margin: -2rem -5%;
    background: var(--bg-main);
}

/* === Sidebar === */
.chat-sidebar {
    width: 300px;
    flex-shrink: 0;
    background: rgba(255,255,255,0.02);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    overflow-y: auto;
}

.sidebar-header h2 {
    font-size: 1.2rem;
    font-weight: 700;
    background: linear-gradient(135deg, #6d5dfc, #e92efb);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.25rem;
}

.sidebar-sub {
    font-size: 0.78rem;
    color: var(--text-secondary);
}

/* Connection Panel */
.connection-panel {
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.85rem;
    font-weight: 500;
}

.status-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    flex-shrink: 0;
}

.status-indicator.disconnected { color: var(--text-secondary); }
.status-indicator.disconnected .status-dot { background: #555; }

.status-indicator.connected { color: #4ade80; }
.status-indicator.connected .status-dot {
    background: #4ade80;
    box-shadow: 0 0 8px #4ade80;
    animation: pulse-green 2s infinite;
}

@keyframes pulse-green {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.btn-connect {
    background: linear-gradient(135deg, #6d5dfc, #e92efb);
    color: white;
    border: none;
    padding: 0.75rem 1rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.88rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: opacity 0.2s, transform 0.2s;
    width: 100%;
}

.btn-connect:hover { opacity: 0.85; transform: translateY(-2px); }
.btn-connect:active { transform: scale(0.97); }
.btn-connect.loading { opacity: 0.6; cursor: not-allowed; }

/* Upload Panel */
.upload-panel { display: flex; flex-direction: column; gap: 0.6rem; }

.upload-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
}

.upload-hint {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: -0.3rem;
}

.upload-zone {
    border: 1.5px dashed rgba(109, 93, 252, 0.4);
    border-radius: 14px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    transition: border-color 0.3s, background 0.3s;
    color: var(--text-secondary);
    font-size: 0.82rem;
    text-align: center;
}

.upload-zone:hover {
    border-color: #6d5dfc;
    background: rgba(109, 93, 252, 0.06);
    color: var(--text-primary);
}

.upload-zone.dragover {
    border-color: #6d5dfc;
    background: rgba(109, 93, 252, 0.1);
}

.upload-zone.uploaded {
    border-color: #4ade80;
    background: rgba(74, 222, 128, 0.05);
    color: #4ade80;
}

.upload-status {
    font-size: 0.78rem;
    color: #4ade80;
    min-height: 1.2em;
}

.upload-status.error { color: #f87171; }

/* Session Info */
.session-info {
    background: rgba(109, 93, 252, 0.06);
    border: 1px solid rgba(109, 93, 252, 0.2);
    border-radius: 12px;
    padding: 1rem;
}

.session-label {
    font-size: 0.72rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 0.3rem;
}

.session-id {
    font-size: 0.75rem;
    font-family: 'Courier New', monospace;
    color: #a89dff;
    word-break: break-all;
    margin-bottom: 0.8rem;
}

.btn-reset {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    font-size: 0.78rem;
    cursor: pointer;
    transition: border-color 0.2s, color 0.2s;
    width: 100%;
}

.btn-reset:hover { border-color: #f87171; color: #f87171; }

/* === Chat Main === */
.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

/* Overlay */
.chat-overlay {
    position: absolute;
    inset: 0;
    background: rgba(10, 11, 16, 0.85);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: opacity 0.4s ease;
}

.chat-overlay.hidden { opacity: 0; pointer-events: none; }

.overlay-card {
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 2.5rem;
    max-width: 380px;
    text-align: center;
}

.overlay-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, rgba(109,93,252,0.2), rgba(233,46,251,0.1));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: #a89dff;
}

.overlay-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.75rem;
}

.overlay-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

.overlay-card strong { color: var(--accent); }

/* Messages */
.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    scroll-behavior: smooth;
}

.messages-container::-webkit-scrollbar { width: 5px; }
.messages-container::-webkit-scrollbar-track { background: transparent; }
.messages-container::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 3px; }

.message {
    display: flex;
    gap: 0.9rem;
    animation: msgIn 0.3s ease;
    max-width: 85%;
}

@keyframes msgIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

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

.message-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 700;
    font-family: 'Outfit', sans-serif;
}

.message.user .message-avatar {
    background: linear-gradient(135deg, #6d5dfc, #e92efb);
    color: white;
}

.message.assistant .message-avatar {
    background: rgba(255,255,255,0.07);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.message-bubble {
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    padding: 0.85rem 1.1rem;
    font-size: 0.9rem;
    line-height: 1.65;
    color: var(--text-primary);
    word-break: break-word;
}

.message.user .message-bubble {
    background: linear-gradient(135deg, rgba(109,93,252,0.2), rgba(233,46,251,0.1));
    border-color: rgba(109,93,252,0.3);
}

/* Typing indicator */
.typing-indicator .message-bubble {
    padding: 1rem 1.1rem;
    display: flex;
    gap: 4px;
    align-items: center;
}

.typing-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--text-secondary);
    animation: typing 1.4s ease infinite;
}

.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
    30% { transform: translateY(-6px); opacity: 1; }
}

/* Input Area */
.input-area {
    padding: 1.25rem 2rem;
    border-top: 1px solid var(--border-color);
    background: var(--bg-main);
}

.input-wrapper {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 0.75rem 1rem;
    transition: border-color 0.2s;
}

.input-wrapper:focus-within { border-color: rgba(109,93,252,0.5); }

.input-wrapper textarea {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 0.9rem;
    resize: none;
    max-height: 150px;
    line-height: 1.6;
    font-family: 'Inter', sans-serif;
}

.input-wrapper textarea::placeholder { color: var(--text-secondary); }
.input-wrapper textarea:disabled { cursor: not-allowed; }

.send-btn {
    background: linear-gradient(135deg, #6d5dfc, #e92efb);
    border: none;
    border-radius: 10px;
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: white;
    flex-shrink: 0;
    transition: opacity 0.2s, transform 0.2s;
}

.send-btn:hover:not(:disabled) { opacity: 0.85; transform: scale(1.05); }
.send-btn:disabled { opacity: 0.3; cursor: not-allowed; }

.input-hint {
    font-size: 0.72rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
    padding: 0 0.25rem;
}

.input-hint kbd {
    background: rgba(255,255,255,0.08);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.1rem 0.3rem;
    font-size: 0.68rem;
    font-family: monospace;
}

/* === Markdown rendering inside AI bubbles === */
.message.assistant .message-bubble h1,
.message.assistant .message-bubble h2,
.message.assistant .message-bubble h3 {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    margin: 0.75rem 0 0.4rem;
    color: var(--text-primary);
    line-height: 1.3;
}

.message.assistant .message-bubble h1 { font-size: 1.1rem; }
.message.assistant .message-bubble h2 { font-size: 1rem; }
.message.assistant .message-bubble h3 { font-size: 0.95rem; }

.message.assistant .message-bubble p { margin: 0.4rem 0; }

.message.assistant .message-bubble ul,
.message.assistant .message-bubble ol {
    padding-left: 1.3rem;
    margin: 0.4rem 0;
}

.message.assistant .message-bubble li { margin: 0.2rem 0; }

.message.assistant .message-bubble strong { color: #c4b8ff; }

.message.assistant .message-bubble code {
    background: rgba(255,255,255,0.08);
    border-radius: 4px;
    padding: 0.1rem 0.35rem;
    font-family: 'Courier New', monospace;
    font-size: 0.85em;
    color: #e2c4ff;
}

.message.assistant .message-bubble pre {
    background: rgba(0,0,0,0.3);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    overflow-x: auto;
    margin: 0.6rem 0;
}

.message.assistant .message-bubble pre code {
    background: transparent;
    padding: 0;
    font-size: 0.82rem;
}

@media (max-width: 768px) {
    .chat-layout { flex-direction: column; height: auto; }
    .chat-sidebar { width: 100%; border-right: none; border-bottom: 1px solid var(--border-color); }
    .chat-main { height: 70vh; }
}