/* --- Variables de thème --- */
:root {
    --bg: #ffffff;
    --bg-sidebar: #f0f0f0;
    --bg-msg-user: #f0f0f0;
    --bg-msg-assistant: #e0e0e0;
    --text: #1a1a1a;
    --text-secondary: #888;
    --border: #e0e0e0;
    --bg-input: #fff;
    --bg-hover: #e4e4e4;
    --bg-active: #dcdcdc;
    --btn-bg: #1a1a1a;
    --btn-text: #fff;
    --border-light: #e8e8e8;
    --border-input: #d0d0d0;
    --sp-title-color: #555;
    --scrollbar-thumb: #ccc;
    --conv-delete-color: #999;
}

body.dark {
    --bg: #1a1a1a;
    --bg-sidebar: #252525;
    --bg-msg-user: #2a2a2a;
    --bg-msg-assistant: #333333;
    --text: #e0e0e0;
    --text-secondary: #999;
    --border: #333;
    --bg-input: #2a2a2a;
    --bg-hover: #353535;
    --bg-active: #3a3a3a;
    --btn-bg: #e0e0e0;
    --btn-text: #1a1a1a;
    --border-light: #333;
    --border-input: #444;
    --sp-title-color: #aaa;
    --scrollbar-thumb: #555;
    --conv-delete-color: #777;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    display: flex;
    height: 100vh;
    overflow: hidden;
    background: var(--bg);
    color: var(--text);
}

/* Sidebar */
.sidebar-toggle {
    position: fixed;
    top: 10px;
    left: 224px;
    z-index: 100;
    background: var(--bg-sidebar);
    border: 1px solid var(--border-input);
    border-radius: 6px;
    padding: 4px 6px;
    cursor: pointer;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: left 0.25s ease, color 0.15s, background 0.15s;
}

.sidebar-toggle:hover {
    color: var(--text);
    background: var(--bg-hover);
}

.sidebar-toggle.collapsed {
    left: 8px;
}

.sidebar {
    width: 240px;
    min-width: 240px;
    background: var(--bg-sidebar);
    display: flex;
    flex-direction: column;
    padding: 24px 16px;
    border-right: 1px solid var(--border);
    transition: width 0.25s ease, min-width 0.25s ease, padding 0.25s ease, opacity 0.2s ease;
    overflow: hidden;
}

.sidebar.collapsed {
    width: 0;
    min-width: 0;
    padding: 24px 0;
    opacity: 0;
    border-right: none;
}

.sidebar-title {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--text);
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}
.version-badge {
    font-size: 0.45em;
    font-weight: 600;
    opacity: 0.5;
    vertical-align: super;
}

.sidebar-credit {
    display: block;
    text-align: center;
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 20px;
    transition: color 0.15s;
}

.sidebar-credit:hover {
    color: var(--text);
    text-decoration: underline;
}

.sidebar-logo {
    flex-shrink: 0;
}

.new-chat-btn {
    background: var(--bg-input);
    border: 1px solid var(--border-input);
    border-radius: 8px;
    padding: 10px 14px;
    font-size: 0.9rem;
    cursor: pointer;
    text-align: left;
    transition: background 0.15s;
    color: var(--text);
}

.new-chat-btn:hover {
    background: var(--bg-hover);
}

/* Boutons bas de sidebar */
.sidebar-bottom {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-top: auto;
    margin-bottom: 0;
}

.sidebar-bottom-row {
    display: flex;
    gap: 6px;
}

.sidebar-bottom-row .sidebar-bottom-btn {
    flex: 1;
}

.sidebar-bottom-btn {
    background: none;
    border: 1px solid var(--border-input);
    border-radius: 8px;
    padding: 7px 10px;
    font-size: 0.82rem;
    font-family: inherit;
    cursor: pointer;
    color: var(--text-secondary);
    transition: background 0.15s, color 0.15s;
    text-align: center;
}

.sidebar-bottom-btn:hover {
    background: var(--bg-hover);
    color: var(--text);
}

/* Recherche de conversations */
#conv-search {
    width: 100%;
    padding: 8px 12px;
    font-family: inherit;
    font-size: 0.85rem;
    border: 1px solid var(--border-input);
    border-radius: 8px;
    outline: none;
    background: var(--bg-input);
    color: var(--text);
    margin-top: 16px;
    margin-bottom: 4px;
}

#conv-search:focus {
    border-color: var(--text-secondary);
}

#conv-search::placeholder {
    color: var(--text-secondary);
}

/* Liste des conversations */
.conv-list-container {
    flex: 1;
    overflow-y: auto;
    margin-top: 4px;
}

.conv-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.conv-item {
    display: flex;
    align-items: center;
    padding: 10px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.15s;
    overflow: hidden;
}

.conv-item-content {
    flex: 1;
    min-width: 0;
}

.conv-delete-btn {
    display: none;
    background: none;
    border: none;
    color: var(--conv-delete-color);
    font-size: 1.1rem;
    cursor: pointer;
    padding: 2px 6px;
    border-radius: 4px;
    line-height: 1;
    flex-shrink: 0;
}

.conv-item:hover .conv-delete-btn {
    display: block;
}

.conv-delete-btn:hover {
    color: #c00;
    background: rgba(200, 0, 0, 0.1);
}

.conv-item:hover {
    background: var(--bg-hover);
}

.conv-item.active {
    background: var(--bg-active);
}

.conv-item-title {
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text);
}

.conv-item-date-line {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-top: 2px;
}

.conv-item-date {
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.conv-rename-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0;
    display: flex;
    align-items: center;
    opacity: 0;
    transition: opacity 0.15s, color 0.15s;
}

.conv-item:hover .conv-rename-btn {
    opacity: 1;
}

.conv-rename-btn:hover {
    color: var(--text);
}

.conv-rename-input {
    width: 100%;
    font-family: inherit;
    font-size: 0.8rem;
    padding: 1px 4px;
    border: 1px solid var(--border-input);
    border-radius: 4px;
    background: var(--bg-input);
    color: var(--text);
    outline: none;
}

.conv-list-container::-webkit-scrollbar {
    width: 4px;
}

.conv-list-container::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 2px;
}

/* Main */
.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
    position: relative;
}

/* Chat container */
.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 24px 32px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* Messages */
.message {
    max-width: 75%;
    padding: 14px 18px;
    border-radius: 16px;
    font-size: 0.95rem;
    line-height: 1.6;
    word-wrap: break-word;
    position: relative;
}

.message-user .message-text {
    white-space: pre-wrap;
}

.message-text {
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.message-text p {
    margin: 0 0 0.5em 0;
}

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

.message-text pre {
    background: rgba(0,0,0,0.08);
    border-radius: 8px;
    padding: 12px;
    overflow-x: auto;
    margin: 0.5em 0;
    font-size: 0.85rem;
}

body.dark .message-text pre {
    background: rgba(255,255,255,0.08);
}

.message-text code {
    background: rgba(0,0,0,0.06);
    border-radius: 3px;
    padding: 1px 4px;
    font-size: 0.88em;
}

body.dark .message-text code {
    background: rgba(255,255,255,0.1);
}

.message-text pre code {
    background: none;
    padding: 0;
    border-radius: 0;
    font-size: inherit;
}

.message-text ul, .message-text ol {
    margin: 0.4em 0;
    padding-left: 1.5em;
}

.message-text h1, .message-text h2, .message-text h3 {
    margin: 0.6em 0 0.3em 0;
    line-height: 1.3;
}

.message-text h1 { font-size: 1.2em; }
.message-text h2 { font-size: 1.1em; }
.message-text h3 { font-size: 1em; }

.message-text blockquote {
    border-left: 3px solid var(--border-input);
    margin: 0.5em 0;
    padding: 0.2em 0 0.2em 12px;
    color: var(--text-secondary);
}

.message-text table {
    border-collapse: collapse;
    margin: 0.5em 0;
    font-size: 0.9em;
}

.message-text th, .message-text td {
    border: 1px solid var(--border);
    padding: 4px 10px;
}

.message-text th {
    background: rgba(0,0,0,0.04);
}

body.dark .message-text th {
    background: rgba(255,255,255,0.06);
}

/* Citations Perplexity */
.citations-block {
    margin-top: 12px;
    padding-top: 10px;
    border-top: 1px solid var(--border-light);
}

.citations-title {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 6px;
}

.citations-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.citations-list li {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.8rem;
    background: var(--bg-hover);
    border-radius: 6px;
    padding: 3px 8px;
    transition: background 0.15s;
}

.citations-list li:hover {
    background: var(--bg-active);
}

.citation-num {
    color: var(--text-secondary);
    font-size: 0.7rem;
    font-weight: 600;
}

.citations-list a {
    color: var(--text);
    text-decoration: none;
}

.citations-list a:hover {
    text-decoration: underline;
}

/* Wrapper message + bouton copier */
.message-wrapper {
    display: flex;
    flex-direction: column;
    max-width: 75%;
}

.message-wrapper-user {
    align-self: flex-start;
}

.message-wrapper-assistant {
    align-self: flex-end;
}

.message-wrapper .message {
    max-width: 100%;
}

.message-btn-row {
    display: flex;
    gap: 4px;
    align-items: center;
    justify-content: flex-end;
    width: 100%;
}

.message-btn-row .message-copy-btn,
.message-btn-row .message-tts-btn,
.message-btn-row .message-save-prompt-btn,
.message-btn-row .regen-btn {
    opacity: 0.5;
    transition: opacity 0.15s;
}

.message-btn-row .message-copy-btn:hover,
.message-btn-row .message-tts-btn:hover,
.message-btn-row .message-save-prompt-btn:hover,
.message-btn-row .regen-btn:hover {
    opacity: 1;
}

.message-gen-time {
    font-size: 0.7rem;
    color: var(--text-secondary);
    opacity: 0.5;
    margin-right: auto;
}

.message-copy-btn,
.message-tts-btn {
    background: none;
    border: none;
    padding: 4px 6px;
    cursor: pointer;
    color: var(--text-secondary);
    line-height: 1;
    transition: color 0.15s;
}

.message-copy-btn:hover,
.message-tts-btn:hover {
    color: var(--text);
}

/* Images dans les messages */
.message-images {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 8px;
}

.message-images img {
    max-width: 400px;
    max-height: 400px;
    border-radius: 8px;
    object-fit: contain;
    cursor: pointer;
}

.message-user .message-images img {
    max-width: 200px;
    max-height: 200px;
    object-fit: cover;
}

.message-image-wrap {
    position: relative;
    display: inline-block;
}

.image-download-btn {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,0.55);
    border: none;
    border-radius: 6px;
    padding: 5px 7px;
    cursor: pointer;
    color: #fff;
    line-height: 1;
    opacity: 0;
    transition: opacity 0.15s;
}

.message-image-wrap:hover .image-download-btn {
    opacity: 1;
}

.image-download-btn:hover {
    background: rgba(0,0,0,0.8);
}

/* Bouton régénérer (dans btn-row) */
.regen-btn {
    background: none;
    border: none;
    padding: 4px 6px;
    cursor: pointer;
    color: var(--text-secondary);
    line-height: 1;
    transition: color 0.15s;
}

.regen-btn:hover {
    color: var(--text);
}

/* Bouton micro */

.web-search-toggle {
    background: none;
    border: 1px solid var(--border-input);
    border-radius: 6px;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 3px 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: background 0.15s, color 0.15s, border-color 0.15s;
    margin-bottom: 2px;
}

.web-search-toggle:hover {
    color: var(--text);
    background: var(--bg-hover);
}

.web-search-toggle.active {
    color: #2563eb;
    border-color: #2563eb;
    background: rgba(37, 99, 235, 0.1);
}

body.dark .web-search-toggle.active {
    color: #60a5fa;
    border-color: #60a5fa;
    background: rgba(96, 165, 250, 0.12);
}

.mic-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    color: var(--text-secondary);
    flex-shrink: 0;
    transition: color 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 2px;
}

.mic-btn:hover {
    color: var(--text);
}

.mic-btn.recording {
    color: #c00;
    animation: pulse-mic 1s ease-in-out infinite;
}

@keyframes pulse-mic {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* Spinner pour chargement TTS / Whisper */
.spin {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.message-user {
    align-self: flex-start;
    background: var(--bg-msg-user);
    border-bottom-left-radius: 4px;
}

.message-assistant {
    align-self: flex-end;
    background: var(--bg-msg-assistant);
    border-bottom-right-radius: 4px;
}

.message-assistant.streaming {
    min-height: 40px;
}

/* Curseur clignotant pendant le streaming */
.message-assistant.streaming::after {
    content: '\25CD';
    animation: blink 0.8s step-end infinite;
    color: var(--text-secondary);
}

@keyframes blink {
    50% { opacity: 0; }
}

/* Alerte modèle manquant */
.model-alert {
    margin: 0 32px;
    padding: 8px 16px;
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffc107;
    border-radius: 8px;
    font-size: 0.82rem;
    text-align: center;
    animation: fadeIn 0.2s ease;
}

body.dark .model-alert {
    background: #3d3520;
    color: #ffc107;
    border-color: #665a28;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Sélecteur de modèle */
.model-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 32px;
    border-top: 1px solid var(--border-light);
    flex-wrap: wrap;
}

.model-bar-spacer {
    flex: 1;
}

.model-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.model-select {
    font-size: 0.8rem;
    font-family: inherit;
    padding: 4px 8px;
    border: 1px solid var(--border-input);
    border-radius: 6px;
    background: var(--bg-input);
    color: var(--text);
    cursor: pointer;
    outline: none;
}

.model-select:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--bg-sidebar);
}

.favorite-model-btn {
    background: none;
    border: 1px solid var(--border-input);
    border-radius: 6px;
    padding: 3px 6px;
    cursor: pointer;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s, color 0.15s, border-color 0.15s;
    height: 30px;
    margin-left: 4px;
}

.favorite-model-btn:hover {
    color: var(--text);
    background: var(--bg-hover);
}

.favorite-model-btn.active {
    color: #f59e0b;
    border-color: #f59e0b;
    background: rgba(245, 158, 11, 0.1);
}

.favorite-model-btn.active svg {
    fill: #f59e0b;
}

body.dark .favorite-model-btn.active {
    background: rgba(245, 158, 11, 0.15);
}

/* Barre de tokens */
.token-bar {
    display: flex;
    justify-content: space-between;
    padding: 6px 32px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-light);
}

#token-info {
    font-variant-numeric: tabular-nums;
}

#cost-info {
    font-variant-numeric: tabular-nums;
}

/* Zone de prévisualisation des pièces jointes */
#attach-preview {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    width: 100%;
    max-width: 800px;
}

#attach-preview:empty {
    display: none;
}

.attach-thumb {
    position: relative;
    display: inline-block;
}

.attach-thumb img {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: 8px;
    border: 1px solid var(--border-input);
}

.attach-thumb-remove {
    position: absolute;
    top: -6px;
    right: -6px;
    background: var(--btn-bg);
    color: var(--btn-text);
    border: none;
    border-radius: 50%;
    width: 18px;
    height: 18px;
    font-size: 0.7rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

/* Zone de saisie */
.input-area {
    padding: 16px 32px 24px;
    border-top: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    transition: border-color 0.15s, background 0.15s;
}

.input-area.drag-over {
    background: rgba(59, 130, 246, 0.06);
    border-top-color: #3b82f6;
}

.input-area.drag-over .input-wrapper {
    border-color: #3b82f6;
}

.input-wrapper {
    display: flex;
    align-items: flex-end;
    width: 100%;
    max-width: 800px;
    border: 2px solid var(--border-input);
    border-radius: 16px;
    padding: 8px 8px 8px 12px;
    transition: border-color 0.2s;
    background: var(--bg-input);
    gap: 6px;
}

.input-wrapper:focus-within {
    border-color: var(--text-secondary);
}

#attach-btn {
    background: none;
    border: 1px solid var(--border-input);
    border-radius: 50%;
    width: 28px;
    height: 28px;
    min-width: 28px;
    min-height: 28px;
    font-size: 1.1rem;
    font-weight: 300;
    cursor: pointer;
    padding: 0;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: color 0.15s, border-color 0.15s;
    line-height: 1;
    margin-bottom: 2px;
}

#attach-btn:hover {
    color: var(--text);
}

/* Bouton améliorer le prompt */
.enhance-prompt-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    color: var(--text-secondary);
    flex-shrink: 0;
    transition: color 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 2px;
}

.enhance-prompt-btn:hover:not(:disabled) {
    color: #f59e0b;
}

.enhance-prompt-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.enhance-prompt-btn.revert {
    color: #f59e0b;
}

.enhance-prompt-btn.revert:hover {
    color: #d97706;
}

/* Bouton prompt picker */
#prompt-picker-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    color: var(--text-secondary);
    flex-shrink: 0;
    transition: color 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 2px;
}

#prompt-picker-btn:hover {
    color: var(--text);
}

/* Dropdown prompt picker */
.prompt-picker-dropdown {
    position: relative;
    width: 100%;
    max-width: 800px;
    background: var(--bg-input);
    border: 1px solid var(--border-input);
    border-radius: 10px;
    max-height: 200px;
    overflow-y: auto;
    box-shadow: 0 4px 16px rgba(0,0,0,0.12);
    z-index: 100;
}

.prompt-picker-item {
    padding: 8px 14px;
    font-size: 0.85rem;
    cursor: pointer;
    color: var(--text);
    transition: background 0.1s;
    border-bottom: 1px solid var(--border-light);
}

.prompt-picker-item:last-child {
    border-bottom: none;
}

.prompt-picker-item:hover {
    background: var(--bg-hover);
}

.prompt-picker-item-name {
    font-weight: 500;
}

.prompt-picker-item-preview {
    font-size: 0.75rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 2px;
}

.prompt-picker-empty {
    padding: 12px 14px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-align: center;
}

/* Bouton sauvegarder prompt (sous message user) */
.message-save-prompt-btn {
    background: none;
    border: none;
    padding: 4px 6px;
    cursor: pointer;
    color: var(--text-secondary);
    line-height: 1;
    transition: color 0.15s;
}

.message-save-prompt-btn:hover {
    color: var(--text);
}

.prompt-input {
    flex: 1;
    min-width: 0;
    border: none;
    outline: none;
    font-size: 0.95rem;
    font-family: inherit;
    resize: none;
    max-height: 200px;
    line-height: 1.5;
    padding: 4px 0;
    background: transparent;
    align-self: center;
    color: var(--text);
}

.send-btn {
    background: var(--btn-bg);
    color: var(--btn-text);
    border: none;
    border-radius: 10px;
    padding: 6px 16px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.15s;
    white-space: nowrap;
    flex-shrink: 0;
}

.send-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.send-btn:not(:disabled):hover {
    opacity: 0.8;
}

.input-hint {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Groupe de boutons export */
.export-btns-group {
    position: absolute;
    bottom: 200px;
    left: 16px;
    z-index: 10;
    display: flex;
    flex-direction: row;
    gap: 6px;
}

.export-action-btn {
    background: var(--bg-sidebar);
    border: 1px solid var(--border-input);
    border-radius: 8px;
    padding: 6px 8px;
    cursor: pointer;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.15s, background 0.15s;
    opacity: 0.6;
}

.export-action-btn:hover {
    color: var(--text);
    background: var(--bg-hover);
    opacity: 1;
}

.chat-container::-webkit-scrollbar {
    width: 6px;
}

.chat-container::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 3px;
}

/* --- System Prompts sidebar --- */
.sp-section {
    margin-top: 16px;
    border-top: 1px solid var(--border);
    padding-top: 12px;
}

.sp-header {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-bottom: 4px;
    cursor: pointer;
}

.sp-header .sp-add-btn:first-of-type {
    margin-left: auto;
}

.sp-toggle {
    font-size: 1rem;
    color: var(--text-secondary);
    display: inline-block;
    transition: transform 0.2s;
    user-select: none;
    width: 14px;
    text-align: center;
    line-height: 1;
}

.sp-collapsible {
    overflow: hidden;
    transition: max-height 0.25s ease, opacity 0.2s ease;
    max-height: 2000px;
    opacity: 1;
}

.sp-collapsible.collapsed {
    max-height: 0;
    opacity: 0;
}

.sp-title {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--sp-title-color);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.sp-add-btn {
    background: none;
    border: 1px solid var(--scrollbar-thumb);
    border-radius: 4px;
    width: 24px;
    height: 24px;
    font-size: 1rem;
    line-height: 1;
    cursor: pointer;
    color: var(--sp-title-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

.sp-add-btn:hover {
    background: var(--bg-hover);
    color: var(--text);
}

.sp-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.sp-item {
    display: flex;
    align-items: center;
    padding: 6px 10px;
    border-radius: 6px;
    font-size: 0.82rem;
    cursor: default;
    color: var(--text);
}

.sp-item:hover {
    background: var(--bg-hover);
}

.sp-item-name {
    flex: 1;
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sp-item-actions {
    display: none;
    gap: 2px;
    flex-shrink: 0;
}

.sp-item:hover .sp-item-actions {
    display: flex;
}

.sp-item-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.85rem;
    padding: 2px 5px;
    border-radius: 4px;
    color: var(--text-secondary);
    line-height: 1;
}

.sp-item-btn:hover {
    color: var(--text);
    background: var(--bg-hover);
}

.sp-item-btn.delete:hover {
    color: #c00;
    background: rgba(200,0,0,0.1);
}

/* --- Modale System Prompt --- */
.sp-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.sp-modal {
    background: var(--bg-input);
    border-radius: 12px;
    padding: 24px;
    width: 480px;
    max-width: 90vw;
    max-height: 80vh;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
    color: var(--text);
}

.sp-modal h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
}

.sp-modal-label {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--sp-title-color);
}

.sp-modal-input {
    font-family: inherit;
    font-size: 0.9rem;
    padding: 8px 12px;
    border: 1px solid var(--border-input);
    border-radius: 8px;
    outline: none;
    background: var(--bg);
    color: var(--text);
}

.sp-modal-input:focus {
    border-color: var(--text-secondary);
}

.sp-modal-textarea {
    font-family: inherit;
    font-size: 0.9rem;
    padding: 8px 12px;
    border: 1px solid var(--border-input);
    border-radius: 8px;
    outline: none;
    resize: vertical;
    min-height: 120px;
    background: var(--bg);
    color: var(--text);
}

.sp-modal-textarea:focus {
    border-color: var(--text-secondary);
}

.sp-modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 4px;
}

.sp-modal-btn {
    font-family: inherit;
    font-size: 0.85rem;
    padding: 8px 18px;
    border-radius: 8px;
    cursor: pointer;
    border: none;
}

.sp-modal-btn-cancel {
    background: var(--bg-sidebar);
    color: var(--sp-title-color);
}

.sp-modal-btn-cancel:hover {
    background: var(--bg-hover);
}

.sp-modal-btn-save {
    background: var(--btn-bg);
    color: var(--btn-text);
}

.sp-modal-btn-save:hover {
    opacity: 0.85;
}

.sp-modal-btn-optimize {
    background: none;
    border: 1px solid #7c3aed;
    color: #7c3aed;
    transition: background 0.15s, color 0.15s;
}

body.dark .sp-modal-btn-optimize {
    border-color: #a78bfa;
    color: #a78bfa;
}

.sp-modal-btn-optimize:hover {
    background: #7c3aed;
    color: #fff;
}

body.dark .sp-modal-btn-optimize:hover {
    background: #a78bfa;
    color: #1a1a1a;
}

.sp-modal-btn-optimize:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.sp-modal-spacer {
    flex: 1;
}

/* --- Champs clés API (modale Config) --- */
.apikey-field {
    display: flex;
    align-items: center;
    gap: 6px;
}

.apikey-input {
    flex: 1;
    min-width: 0;
}

.apikey-toggle-vis {
    background: none;
    border: 1px solid var(--border-input);
    border-radius: 6px;
    padding: 6px 8px;
    cursor: pointer;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.15s, background 0.15s;
    flex-shrink: 0;
}

.apikey-toggle-vis:hover {
    color: var(--text);
    background: var(--bg-hover);
}

.apikey-intro {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0;
}

.apikey-link {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.15s;
    margin-top: -4px;
}

.apikey-link:hover {
    color: var(--text);
    text-decoration: underline;
}

/* --- Dashboard Statistiques --- */
.dashboard-modal {
    width: 700px;
    max-height: 85vh;
}

.dashboard-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.dashboard-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
}

.dashboard-tabs {
    display: flex;
    gap: 4px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0;
}

.dashboard-tab {
    font-family: inherit;
    font-size: 0.82rem;
    padding: 7px 14px;
    border: none;
    background: none;
    color: var(--text-secondary);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: color 0.15s, border-color 0.15s;
}

.dashboard-tab:hover {
    color: var(--text);
}

.dashboard-tab.active {
    color: var(--text);
    border-bottom-color: var(--text);
    font-weight: 600;
}

.dashboard-content {
    overflow-y: auto;
    max-height: 60vh;
}

.dashboard-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
}

.dashboard-table th,
.dashboard-table td {
    padding: 7px 10px;
    text-align: left;
    border-bottom: 1px solid var(--border-light);
}

.dashboard-table th {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    position: sticky;
    top: 0;
    background: var(--bg-input);
}

.dashboard-table td {
    color: var(--text);
}

.dashboard-table td.num {
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.dashboard-table th.num {
    text-align: right;
}

.dashboard-table tbody tr:hover {
    background: var(--bg-hover);
}

.dashboard-empty {
    text-align: center;
    color: var(--text-secondary);
    padding: 32px 0;
    font-size: 0.85rem;
}

.dashboard-content::-webkit-scrollbar {
    width: 4px;
}

.dashboard-content::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 2px;
}

/* --- Chips fichiers joints (preview + messages) --- */
.attach-file-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 10px;
    background: var(--bg-hover);
    border: 1px solid var(--border-input);
    border-radius: 8px;
    font-size: 0.8rem;
    color: var(--text);
    max-width: 200px;
}

.attach-file-chip-icon {
    flex-shrink: 0;
}

.attach-file-chip-name {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
}

.attach-file-chip-remove {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.85rem;
    padding: 0 2px;
    flex-shrink: 0;
    line-height: 1;
    transition: color 0.15s;
}

.attach-file-chip-remove:hover {
    color: #c00;
}

.message-file-chip {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    background: var(--bg-hover);
    border: 1px solid var(--border-input);
    border-radius: 6px;
    font-size: 0.8rem;
    color: var(--text);
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s;
    margin: 4px 4px 4px 0;
}

.message-file-chip:hover {
    background: var(--bg-active);
}

.message-files {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-bottom: 8px;
}

/* --- Graphiques dashboard --- */
.dashboard-chart {
    padding: 16px 0;
}

.dashboard-chart-title {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    margin-bottom: 10px;
}

.dashboard-bar-chart {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.dashboard-bar-row {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
}

.dashboard-bar-label {
    width: 120px;
    min-width: 120px;
    text-align: right;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.dashboard-bar-track {
    flex: 1;
    height: 20px;
    background: var(--bg-hover);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.dashboard-bar-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.3s ease;
    min-width: 2px;
}

.dashboard-bar-value {
    width: 70px;
    min-width: 70px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-variant-numeric: tabular-nums;
}

.dashboard-charts-row {
    display: flex;
    gap: 24px;
}

.dashboard-charts-row .dashboard-chart {
    flex: 1;
    min-width: 0;
}

.dashboard-separator {
    border: none;
    border-top: 1px solid var(--border-light);
    margin: 8px 0;
}

/* --- Barre de catégories --- */
.cat-bar {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 0 2px;
    flex-wrap: wrap;
}

.cat-icons {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.cat-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: 2px solid;
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
    user-select: none;
    padding: 0;
    line-height: 1;
}

.cat-icon:hover {
    transform: scale(1.08);
}

.cat-icon.drag-over {
    transform: scale(1.2);
    box-shadow: 0 0 8px rgba(0,0,0,0.3);
}

.cat-add-btn {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: 2px dashed var(--border-input);
    background: transparent;
    cursor: pointer;
    font-size: 1rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.15s, border-color 0.15s;
    padding: 0;
    line-height: 1;
}

.cat-add-btn:hover {
    color: var(--text);
    border-color: var(--text-secondary);
}

.cat-color-picker {
    width: 100%;
    height: 36px;
    border: 1px solid var(--border-input);
    border-radius: 8px;
    padding: 2px;
    cursor: pointer;
    background: var(--bg);
}

/* Emoji Picker */
.emoji-picker-wrapper {
    position: relative;
}

.emoji-picker-selected {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border-input);
    border-radius: 8px;
    background: var(--bg-input);
    color: var(--text);
    font-size: 1.5rem;
    cursor: pointer;
    transition: border-color 0.15s;
}

.emoji-picker-selected:hover {
    border-color: var(--text-secondary);
}

.emoji-picker {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 200;
    background: var(--bg-input);
    border: 1px solid var(--border-input);
    border-radius: 10px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
    margin-top: 4px;
    padding: 8px;
    max-height: 320px;
    display: flex;
    flex-direction: column;
}

.emoji-search {
    width: 100%;
    padding: 6px 10px;
    border: 1px solid var(--border-input);
    border-radius: 6px;
    font-size: 0.82rem;
    background: var(--bg);
    color: var(--text);
    outline: none;
    margin-bottom: 6px;
}

.emoji-search:focus {
    border-color: var(--text-secondary);
}

.emoji-tabs {
    display: flex;
    gap: 2px;
    margin-bottom: 6px;
    overflow-x: auto;
    flex-shrink: 0;
}

.emoji-tab {
    background: none;
    border: none;
    padding: 4px 6px;
    font-size: 1.1rem;
    cursor: pointer;
    border-radius: 6px;
    transition: background 0.1s;
    flex-shrink: 0;
    line-height: 1;
}

.emoji-tab:hover {
    background: var(--bg-hover);
}

.emoji-tab.active {
    background: var(--bg-active);
}

.emoji-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 2px;
    overflow-y: auto;
    flex: 1;
    min-height: 0;
}

.emoji-grid-item {
    background: none;
    border: none;
    padding: 4px;
    font-size: 1.25rem;
    cursor: pointer;
    border-radius: 6px;
    transition: background 0.1s;
    line-height: 1.3;
    text-align: center;
}

.emoji-grid-item:hover {
    background: var(--bg-hover);
}

.emoji-cat-label {
    grid-column: 1 / -1;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 6px 4px 2px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.conv-item[draggable="true"] {
    cursor: grab;
}

.conv-item.dragging {
    opacity: 0.4;
}

.conv-uncat-btn {
    display: none;
    background: none;
    border: none;
    color: var(--conv-delete-color);
    font-size: 0.85rem;
    cursor: pointer;
    padding: 2px 5px;
    border-radius: 4px;
    line-height: 1;
    flex-shrink: 0;
    margin-right: 2px;
}

.conv-item:hover .conv-uncat-btn {
    display: block;
}

.conv-uncat-btn:hover {
    color: #c00;
    background: rgba(200, 0, 0, 0.1);
}

/* --- Bloc de raisonnement dépliable --- */
.thinking-block {
    margin-bottom: 10px;
    border: 1px solid var(--border-light);
    border-radius: 8px;
    overflow: hidden;
    font-size: 0.85rem;
}

.thinking-block summary {
    padding: 8px 12px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.78rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    background: var(--bg-hover);
    user-select: none;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 6px;
}

.thinking-block summary::before {
    content: '\25B6';
    font-size: 0.6rem;
    transition: transform 0.2s;
}

.thinking-block[open] summary::before {
    transform: rotate(90deg);
}

.thinking-block summary::-webkit-details-marker {
    display: none;
}

.thinking-content {
    padding: 10px 12px;
    color: var(--text-secondary);
    font-size: 0.82rem;
    line-height: 1.5;
    max-height: 300px;
    overflow-y: auto;
    border-top: 1px solid var(--border-light);
}

.thinking-content p {
    margin: 0 0 0.4em 0;
}

.thinking-content p:last-child {
    margin-bottom: 0;
}

.thinking-content::-webkit-scrollbar {
    width: 4px;
}

.thinking-content::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 2px;
}

/* --- Marqueur changement de modèle --- */
.model-switch-marker {
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-secondary);
    padding: 8px 0;
    user-select: none;
}

/* --- Bouton Stop (send-btn en mode streaming) --- */
.send-btn.stop-mode {
    background: #c00;
    color: #fff;
    font-size: 1.1rem;
    line-height: 1;
}

.send-btn.stop-mode:hover {
    opacity: 0.85;
}

/* --- Bouton copier sur les blocs de code --- */
.message-text pre {
    position: relative;
}

.code-copy-btn {
    position: absolute;
    top: 6px;
    right: 6px;
    background: rgba(0,0,0,0.45);
    color: #fff;
    border: none;
    border-radius: 4px;
    padding: 3px 8px;
    font-size: 0.72rem;
    font-family: inherit;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.15s;
    z-index: 1;
}

body.dark .code-copy-btn {
    background: rgba(255,255,255,0.2);
}

.message-text pre:hover .code-copy-btn {
    opacity: 1;
}

.code-copy-btn:hover {
    background: rgba(0,0,0,0.7);
}

body.dark .code-copy-btn:hover {
    background: rgba(255,255,255,0.35);
}

/* --- Lightbox images --- */
.lightbox-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.88);
    z-index: 9000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-img {
    max-width: 92vw;
    max-height: 92vh;
    border-radius: 8px;
    box-shadow: 0 8px 40px rgba(0,0,0,0.5);
    object-fit: contain;
}

.lightbox-close {
    position: fixed;
    top: 16px;
    right: 20px;
    background: rgba(255,255,255,0.15);
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    font-size: 1.5rem;
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9001;
    transition: background 0.15s;
}

.lightbox-close:hover {
    background: rgba(255,255,255,0.3);
}

/* --- Sidebar : section conversations flex + boutons bas toujours visibles --- */
#conv-sp-section {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
}

#conv-sp-section > .sp-collapsible {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
}

#conv-sp-section > .sp-collapsible.collapsed {
    flex: 0;
    max-height: 0;
    overflow: hidden;
}