/* ============================================
   CompositeursGPT — Styles
   Layout: WhatsApp-like (sidebar + chat panel)
   ============================================ */

:root {
    /* Color Palette - WhatsApp Theme */
    --color-bg: #f0f2f5;
    --color-bg-warm: #e9edef;
    --color-bg-card: #ffffff;
    --color-text: #111b21;
    --color-text-muted: #667781;
    --color-text-light: #8696a0;
    --color-accent: #25D366;
    --color-accent-light: #40e67e;
    --color-accent-dark: #128C7E;
    --color-gold: #25D366;
    --color-border: #e9edef;
    --color-shadow: rgba(11, 20, 26, 0.08);

    /* Typography */
    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'Source Sans 3', -apple-system, sans-serif;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Borders & Shadows */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-full: 50%;
    --shadow-sm: 0 2px 8px var(--color-shadow);
    --shadow-md: 0 4px 20px var(--color-shadow);
    --shadow-lg: 0 8px 40px var(--color-shadow);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;

    /* Layout */
    --sidebar-width: 360px;
}

/* ============================================
   Dark Mode Theme Variables
   ============================================ */
[data-theme="dark"] {
    /* Dark Color Palette */
    --color-bg: #111b21;
    --color-bg-warm: #0b141a;
    --color-bg-card: #202c33;
    --color-text: #e9edef;
    --color-text-muted: #8696a0;
    --color-text-light: #667781;
    --color-accent: #25D366;
    --color-accent-light: #40e67e;
    --color-accent-dark: #1da65e;
    --color-gold: #25D366;
    --color-border: #2a3942;
    --color-shadow: rgba(0, 0, 0, 0.3);
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg-warm);
    height: 100vh;
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
}

/* ============================================
   App Container — Two Column Layout
   ============================================ */
.app {
    display: flex;
    height: 100vh;
    max-width: 1400px;
    margin: 0 auto;
    background: var(--color-bg-card);
    box-shadow: var(--shadow-lg);
}

/* ============================================
   Sidebar
   ============================================ */
.sidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--color-border);
    background: var(--color-bg);
}

.sidebar-header {
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg);
}

.sidebar-header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-sm);
}

.header-actions {
    display: flex;
    gap: 8px;
    align-items: center;
}

.theme-toggle-btn {
    background: transparent;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    width: 36px;
    height: 36px;
}

.theme-toggle-btn:hover {
    background: var(--color-bg-warm);
    color: var(--color-accent);
}

.theme-toggle-btn .sun-icon,
.theme-toggle-btn .moon-icon {
    position: absolute;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

/* Light mode: show sun, hide moon */
.theme-toggle-btn .sun-icon {
    opacity: 1;
    transform: rotate(0deg);
}

.theme-toggle-btn .moon-icon {
    opacity: 0;
    transform: rotate(90deg);
}

/* Dark mode: hide sun, show moon */
.theme-toggle-btn.dark .sun-icon {
    opacity: 0;
    transform: rotate(-90deg);
}

.theme-toggle-btn.dark .moon-icon {
    opacity: 1;
    transform: rotate(0deg);
}

.new-chat-btn {
    background: transparent;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.search-container {
    margin-top: var(--space-sm);
}

.search-wrapper {
    display: flex;
    align-items: center;
    background: var(--color-bg-warm);
    border-radius: 8px;
    padding: 6px 12px;
    gap: 10px;
}

.search-icon {
    color: var(--color-text-muted);
    flex-shrink: 0;
}

#composerSearch, #newChatSearchInput {
    border: none;
    background: transparent;
    font-size: 0.875rem;
    color: var(--color-text);
    width: 100%;
    outline: none;
    font-family: var(--font-body);
}

#composerSearch::placeholder, #newChatSearchInput::placeholder {
    color: var(--color-text-light);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.logo-icon {
    font-size: 1.75rem;
    color: var(--color-gold);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-3px); }
}

.logo h1 {
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

/* Composer List */
.composer-list {
    flex: 1;
    overflow-y: auto;
}

/* New Chat Modal & Popup */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(2px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease;
}

.modal-overlay.hidden {
    display: none;
}

.new-chat-popup {
    background: var(--color-bg);
    width: 90%;
    max-width: 450px;
    max-height: 80vh;
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: popupScale 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes popupScale {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.new-chat-header {
    padding: var(--space-lg);
    background: var(--color-accent);
    color: white;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.new-chat-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0;
}

.close-modal-btn {
    background: transparent;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
}

.new-chat-search {
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}

.new-chat-content {
    flex: 1;
    overflow-y: auto;
    padding-bottom: var(--space-lg);
}

.frequent-section h4, .all-composers-section h4 {
    padding: var(--space-md) var(--space-lg) var(--space-xs);
    font-size: 0.75rem;
    color: var(--color-accent);
    font-weight: 600;
    letter-spacing: 0.05em;
    margin: 0;
}

.modal-composer-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.modal-composer-item:hover {
    background: var(--color-bg-warm);
}

.modal-composer-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    overflow: hidden;
    flex-shrink: 0;
}

.modal-composer-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.modal-composer-info {
    flex: 1;
    min-width: 0;
}

.modal-composer-name {
    display: block;
    font-weight: 500;
    color: var(--color-text);
}

.modal-composer-desc {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.composer-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    cursor: pointer;
    transition: background var(--transition-fast);
    border-bottom: 1px solid var(--color-border);
}

.composer-item:hover {
    background: var(--color-bg-warm);
}

.composer-item.active {
    background: var(--color-bg-warm);
    border-left: 3px solid var(--color-accent);
    padding-left: calc(var(--space-lg) - 3px);
}

.composer-item .composer-avatar {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-bg-warm), var(--color-border));
    flex-shrink: 0;
    border: 2px solid var(--color-border);
    overflow: hidden;
}

.composer-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.composer-item-info {
    flex: 1;
    min-width: 0;
}

.composer-item-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2px;
}

.composer-item-name {
    font-weight: 600;
    color: var(--color-text);
    font-size: 0.9375rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.composer-item-time {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    flex-shrink: 0;
}

.composer-item-preview {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.4;
    flex: 1;
}

.composer-item.unread .composer-item-preview {
    color: var(--color-text);
    font-weight: 600;
}

.composer-item-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-sm);
}

.unread-badge {
    background: #25D366; /* WhatsApp green */
    color: white;
    font-size: 0.65rem;
    font-weight: 700;
    min-width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
    flex-shrink: 0;
}

/* Hide tags and dates in sidebar */
.composer-item-tags, .composer-item-dates {
    display: none;
}

/* Scrollbar for sidebar */
.composer-list::-webkit-scrollbar {
    width: 4px;
}

.composer-list::-webkit-scrollbar-track {
    background: transparent;
}

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

/* ============================================
   Chat Panel
   ============================================ */
.chat-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    position: relative;
    background: var(--color-bg);
}

/* Empty State */
.empty-state {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg);
}

.empty-state-content {
    text-align: center;
    color: var(--color-text-muted);
}

.empty-state-icon {
    font-size: 4rem;
    color: var(--color-gold);
    display: block;
    margin-bottom: var(--space-lg);
    opacity: 0.5;
}

.empty-state h2 {
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-sm);
}

.empty-state p {
    font-size: 1rem;
    color: var(--color-text-light);
}

.empty-state-hint {
    margin-top: var(--space-md);
    font-size: 0.875rem;
    opacity: 0.7;
}

/* Chat Section */
.chat-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
}

.chat-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--color-bg-card);
    border-bottom: 1px solid var(--color-border);
    flex-shrink: 0;
}

.back-btn {
    width: 40px;
    height: 40px;
    display: none;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
}

.back-btn:hover {
    background: var(--color-bg-warm);
    color: var(--color-text);
    border-color: var(--color-accent-light);
}

.current-composer {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.current-composer .composer-avatar {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-bg-warm), var(--color-border));
    border: 2px solid var(--color-border);
    overflow: hidden;
}

.composer-info h3 {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
}

.composer-info span {
    font-size: 0.8125rem;
    color: var(--color-text-light);
}

/* Messages Container */
.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-lg);
}

.messages {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    max-width: 800px;
    margin: 0 auto;
}

/* Message Bubbles */
.message {
    display: flex;
    flex-direction: column;
    animation: messageIn 0.3s ease;
}

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

.message.user {
    align-items: flex-end;
}

.message.assistant {
    align-items: flex-start;
}

.message-content {
    max-width: 85%;
    padding: 6px 10px 8px 10px;
    border-radius: 12px;
    line-height: 1.4;
    position: relative;
    box-shadow: 0 1px 0.5px rgba(0,0,0,0.13);
    font-size: 0.95rem;
}

.message-text {
    margin-bottom: 2px;
    overflow-wrap: break-word;
}

.message-footer {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 8px;
    margin-top: 2px;
}

.message-time {
    font-size: 0.65rem;
    color: var(--color-text-muted);
    opacity: 0.8;
    white-space: nowrap;
    margin-left: auto; /* Force to right if needed, though flex-end handles it */
}

.reply-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 0; /* Remove padding to avoid shifting */
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-family: var(--font-body);
    font-size: 0.75rem;
    cursor: pointer;
    border-radius: var(--radius-sm);
    opacity: 0;
    transition: all var(--transition-fast);
}

.message-content::before {
    content: '';
    position: absolute;
    top: 0;
    width: 10px;
    height: 13px;
}

.message.assistant .message-content {
    background: white;
    border: none;
    border-top-left-radius: 0;
    color: #111b21;
}

.message.assistant .message-content::before {
    left: -10px;
    background: white;
    clip-path: polygon(100% 0, 0 0, 100% 100%);
}

.message.user .message-content {
    background: #d9fdd3;
    color: #111b21;
    border-top-right-radius: 0;
}

.message.user .message-content::before {
    right: -10px;
    background: #d9fdd3;
    clip-path: polygon(0 0, 100% 0, 0 100%);
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: var(--space-md) var(--space-lg);
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--color-text-light);
    border-radius: var(--radius-full);
    animation: typing 1.4s infinite ease-in-out;
}

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

@keyframes typing {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
    30% { transform: translateY(-8px); opacity: 1; }
}

/* Input Area */
.input-area {
    background: var(--color-bg-card);
    border-top: 1px solid var(--color-border);
    padding: var(--space-md) var(--space-lg);
    flex-shrink: 0;
}

.input-wrapper {
    display: flex;
    gap: var(--space-sm);
    align-items: flex-end;
    max-width: 800px;
    margin: 0 auto;
}

#userInput {
    flex: 1;
    padding: var(--space-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 1rem;
    resize: none;
    min-height: 48px;
    max-height: 150px;
    transition: border-color var(--transition-fast);
    background: var(--color-bg);
}

#userInput:focus {
    outline: none;
    border-color: var(--color-accent);
}

#userInput::placeholder {
    color: var(--color-text-light);
}

.attachment-preview {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 8px 12px;
    background: #f8f9fa;
    border-bottom: 1px solid var(--color-border);
    animation: slideInDown 0.2s ease;
}

.attachment-preview.hidden {
    display: none;
}

.file-chip {
    display: flex;
    align-items: center;
    gap: 8px;
    background: white;
    padding: 6px 12px;
    border-radius: 16px;
    border: 1px solid var(--color-border);
    font-size: 0.875rem;
    color: var(--color-text);
    box-shadow: var(--shadow-sm);
}

.file-chip .remove-file {
    background: none;
    border: none;
    color: #ef4444;
    cursor: pointer;
    font-weight: bold;
    font-size: 1.125rem;
    line-height: 1;
    padding: 0;
    margin-left: 4px;
}

.attach-btn {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.attach-btn:hover {
    background: var(--color-bg-warm);
    color: var(--color-accent);
}

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

.mic-btn {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-warm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.mic-btn:hover {
    background: #e1e5e7;
    color: var(--color-accent);
}

.mic-btn.recording {
    background: #fdf2f2;
    color: #ef4444;
    border-color: #fca5a5;
    animation: pulse-red 1.5s infinite;
}

@keyframes pulse-red {
    0% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(239, 68, 68, 0); }
    100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

.send-btn {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    color: white;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.send-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(18, 140, 126, 0.3);
}

.send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.disclaimer {
    font-size: 0.75rem;
    color: var(--color-text-light);
    text-align: center;
    margin-top: var(--space-sm);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================
   Welcome Message
   ============================================ */
.welcome-message {
    text-align: center;
    padding: var(--space-xl);
    color: var(--color-text-muted);
}

.welcome-message h4 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.welcome-message p {
    font-size: 0.9375rem;
    margin-bottom: var(--space-md);
}

.suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    justify-content: center;
}

.suggestion {
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.suggestion:hover {
    background: var(--color-bg-warm);
    border-color: var(--color-accent-light);
    color: var(--color-accent);
}

/* Dynamic Suggestions (after assistant messages) */
.dynamic-suggestions {
    margin-top: var(--space-md);
    padding: var(--space-md);
    background: var(--color-bg-warm);
    border-radius: var(--radius-md);
    animation: suggestionsIn 0.4s ease;
}

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

.dynamic-suggestions .suggestions {
    justify-content: flex-start;
}

.dynamic-suggestions .suggestion {
    font-size: 0.8125rem;
    padding: var(--space-xs) var(--space-sm);
}

/* ============================================
   Group Conversation Mode
   ============================================ */

/* Mode Toggle Container */
.mode-toggle-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-bg-warm);
    border-bottom: 1px solid var(--color-border);
}

.mode-toggle {
    display: flex;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.mode-btn {
    padding: var(--space-xs) var(--space-md);
    background: transparent;
    border: none;
    font-family: var(--font-body);
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.mode-btn.active {
    background: var(--color-accent);
    color: white;
}

.group-action {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.selected-count {
    font-size: 0.75rem;
    color: var(--color-text-light);
}

.start-group-btn {
    padding: var(--space-xs) var(--space-md);
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 0.8125rem;
    color: white;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.start-group-btn:hover:not(:disabled) {
    transform: scale(1.02);
    box-shadow: 0 2px 8px rgba(18, 140, 126, 0.3);
}

.start-group-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Composer Selection in Group Mode */
.composer-item.group-mode {
    position: relative;
}

.selection-indicator {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-full);
    flex-shrink: 0;
    transition: all var(--transition-fast);
}

.composer-item.group-mode:hover .selection-indicator {
    border-color: var(--color-accent-light);
}

.composer-item.selected .selection-indicator {
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.selection-number {
    font-size: 0.75rem;
    font-weight: 600;
    color: white;
}

/* Group Header Avatars */
.current-composer .composer-avatar {
    display: flex;
}

.current-composer .composer-avatar .group-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    border: 2px solid var(--color-bg-card);
    margin-left: -10px;
    object-fit: cover;
}

.current-composer .composer-avatar .group-avatar:first-child {
    margin-left: 0;
}

/* Group Welcome Message */
.group-avatars-large {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    margin-top: var(--space-lg);
}

.group-avatar-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
}

.group-avatar-item img {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-full);
    border: 3px solid var(--color-border);
    object-fit: cover;
}

.group-avatar-item span {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

/* Group Message with Name Badge */
.group-message .message-content {
    position: relative;
}

.composer-name-badge {
    font-family: var(--font-display);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: var(--space-xs);
}

/* ============================================
   Thread/Reply System
   ============================================ */

/* Reply Button */
.reply-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    margin-top: 4px;
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-family: var(--font-body);
    font-size: 0.75rem;
    cursor: pointer;
    border-radius: var(--radius-sm);
    opacity: 0;
    transition: all var(--transition-fast);
}

.reply-btn svg {
    flex-shrink: 0;
}

.message:hover .reply-btn {
    opacity: 1;
}

.reply-btn:hover {
    background: var(--color-bg-warm);
    color: var(--color-accent);
}

/* On mobile, always show reply button */
@media (max-width: 768px) {
    .reply-btn {
        opacity: 1;
    }
}

/* Reply Quote inside messages */
.reply-quote {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: var(--space-sm) var(--space-md);
    margin-bottom: var(--space-sm);
    background: rgba(37, 211, 102, 0.08);
    border-left: 3px solid var(--color-accent-light);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.reply-quote:hover {
    background: rgba(37, 211, 102, 0.15);
}

.reply-author {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-accent);
}

.reply-text {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Message selected for reply */
.message.reply-selected {
    position: relative;
}

.message.reply-selected::before {
    content: '';
    position: absolute;
    inset: -4px;
    border: 2px solid var(--color-accent);
    border-radius: var(--radius-md);
    pointer-events: none;
    animation: pulse-border 1.5s ease-in-out infinite;
}

@keyframes pulse-border {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

/* Highlight flash when scrolling to message */
.message.highlight-flash {
    animation: highlight-flash 1.5s ease-out;
}

@keyframes highlight-flash {
    0% { background: rgba(37, 211, 102, 0.3); }
    100% { background: transparent; }
}

/* Reply Indicator above input */
.reply-indicator {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) var(--space-md);
    margin-bottom: var(--space-sm);
    background: var(--color-bg-warm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    animation: slideDown 0.2s ease;
}

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

.reply-indicator-content {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    overflow: hidden;
}

.reply-indicator-icon {
    color: var(--color-accent);
    font-size: 1rem;
    flex-shrink: 0;
}

.reply-indicator-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
    overflow: hidden;
}

.reply-indicator-author {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-accent);
}

.reply-indicator-preview {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.reply-indicator-cancel {
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: var(--space-xs);
    font-size: 1rem;
    line-height: 1;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.reply-indicator-cancel:hover {
    background: var(--color-border);
    color: var(--color-text);
}

/* Message with thread context - subtle visual indicator */
.message.has-reply-context .message-content {
    position: relative;
}

/* ============================================
   Conversation Summary
   ============================================ */

/* Summary Toggle Button */
.summary-toggle {
    padding: var(--space-xs) var(--space-sm);
    background: rgba(37, 211, 102, 0.1);
    border: 1px solid var(--color-accent-light);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--color-accent);
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.summary-toggle:hover {
    background: rgba(37, 211, 102, 0.2);
    transform: scale(1.05);
}

.summary-toggle.active {
    background: var(--color-accent);
    color: white;
}

/* Menu Container (3 dots) */
.menu-container {
    position: relative;
    margin-left: auto;
}

.menu-btn {
    padding: var(--space-xs) var(--space-sm);
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.menu-btn:hover {
    background: var(--color-bg-warm);
    border-color: var(--color-accent-light);
    color: var(--color-accent);
}

.menu-btn.active {
    background: var(--color-bg-warm);
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* Dropdown Menu */
.dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    min-width: 200px;
    z-index: 100;
    animation: slideDown 0.2s ease;
    overflow: hidden;
}

.menu-section-title {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--color-border);
}

.menu-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    background: none;
    border: none;
    font-family: var(--font-body);
    font-size: 0.875rem;
    color: var(--color-text);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: left;
}

.menu-item:hover {
    background: var(--color-bg-warm);
}

.menu-item.danger {
    color: #dc2626;
}

.menu-item.danger:hover {
    background: rgba(220, 38, 38, 0.1);
}

.menu-item svg {
    flex-shrink: 0;
}

/* Clickable Avatar */
.composer-avatar.clickable {
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.composer-avatar.clickable:hover {
    transform: scale(1.05);
}

/* Summary Panel */
.summary-panel {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg-warm);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-md) var(--space-lg);
    max-height: 300px;
    overflow-y: auto;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    z-index: 10;
    animation: slideDown 0.3s ease;
}

.summary-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--color-border);
}

.summary-header h4 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-accent);
    margin: 0;
}

.summary-close {
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: var(--space-xs);
    font-size: 1.25rem;
    line-height: 1;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.summary-close:hover {
    background: var(--color-border);
    color: var(--color-text);
}

.summary-content {
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--color-text);
    white-space: pre-wrap;
}

.summary-content p {
    margin: 0 0 var(--space-sm) 0;
}

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

/* Badge indicator when summary exists */
.summary-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    background: rgba(37, 211, 102, 0.1);
    border: 1px solid var(--color-accent-light);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    color: var(--color-accent);
    margin-left: var(--space-sm);
}

/* ============================================
   Composer Profile Modal
   ============================================ */
.profile-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1001;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease;
}

.profile-modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.profile-modal-content {
    position: relative;
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
    padding: var(--space-xl);
    animation: slideUp 0.3s ease;
    z-index: 1;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.profile-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background: var(--color-bg-warm);
    border: none;
    border-radius: var(--radius-full);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 1.25rem;
}

.profile-close:hover {
    background: var(--color-border);
    color: var(--color-text);
    transform: rotate(90deg);
}

.profile-header {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.profile-avatar {
    width: 80px;
    height: 80px;
    flex-shrink: 0;
}

.profile-avatar img {
    width: 100%;
    height: 100%;
    border-radius: var(--radius-full);
    border: 3px solid var(--color-accent-light);
    object-fit: cover;
}

.profile-info h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0 0 var(--space-xs) 0;
}

.profile-info span {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.profile-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-bottom: var(--space-lg);
}

.profile-tag {
    padding: var(--space-xs) var(--space-sm);
    background: rgba(37, 211, 102, 0.1);
    border: 1px solid var(--color-accent-light);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    color: var(--color-accent);
    font-weight: 500;
}

.profile-description {
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--color-text);
    padding: var(--space-md);
    background: var(--color-bg-warm);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--color-accent);
}

/* ============================================
   Modal
   ============================================ */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(44, 36, 22, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
    z-index: 1000;
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    max-width: 480px;
    width: 100%;
    box-shadow: var(--shadow-lg);
}

.modal-content h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.modal-content p {
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.modal-content ol {
    margin-left: var(--space-lg);
    margin-bottom: var(--space-lg);
    color: var(--color-text-muted);
}

.modal-content ol li {
    margin-bottom: var(--space-sm);
}

.modal-content a {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
}

.modal-content a:hover {
    text-decoration: underline;
}

.modal-content input {
    width: 100%;
    padding: var(--space-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 1rem;
    margin-bottom: var(--space-lg);
}

.modal-content input:focus {
    outline: none;
    border-color: var(--color-accent);
}

.modal-actions {
    display: flex;
    gap: var(--space-md);
}

.btn {
    flex: 1;
    padding: var(--space-md) var(--space-lg);
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
    color: white;
}

.btn-primary:hover {
    box-shadow: 0 4px 12px rgba(18, 140, 126, 0.3);
}

.btn-secondary {
    background: var(--color-bg-warm);
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-border);
}

.privacy-note {
    font-size: 0.8125rem;
    color: var(--color-text-light);
    margin-top: var(--space-md);
    text-align: center;
}

/* ============================================
   Settings Button
   ============================================ */
.settings-btn {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    cursor: pointer;
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
    z-index: 100;
}

.settings-btn:hover {
    background: var(--color-bg-warm);
    color: var(--color-text);
    transform: rotate(45deg);
}

/* ============================================
   Utilities
   ============================================ */
.hidden {
    display: none !important;
}

/* ============================================
   Scrollbar Styling
   ============================================ */
.messages-container::-webkit-scrollbar {
    width: 6px;
}

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

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

.messages-container::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-light);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    .app {
        position: relative;
    }

    .sidebar {
        width: 100%;
        min-width: 100%;
        position: absolute;
        top: 0;
        left: 0;
        bottom: 0;
        z-index: 10;
        transition: transform var(--transition-normal);
    }

    .sidebar.sidebar-hidden {
        transform: translateX(-100%);
    }

    .chat-panel {
        width: 100%;
    }

    .back-btn {
        display: flex;
    }

    .empty-state {
        display: none;
    }

    .message-content {
        max-width: 85%;
    }

    .settings-btn {
        bottom: var(--space-md);
        right: var(--space-md);
    }
}