/* ==========================================
   Chat Switchboard - Styles
   ========================================== */

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

:root {
    --bg-primary: #212121;
    --bg-secondary: #171717;
    --bg-tertiary: #2f2f2f;
    --text-primary: #ececec;
    --text-secondary: #b4b4b4;
    --accent: #10a37f;
    --accent-hover: #0d8a6a;
    --border: #3a3a3a;
    --code-bg: #1e1e1e;
    --error: #ff6b6b;
    --success: #10a37f;
    --warning: #ffd93d;
    --thinking-bg: #2a2a3a;
    --thinking-border: #4a4a6a;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ==========================================
   Header
   ========================================== */

.header {
    background: var(--bg-secondary);
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent);
}

.header-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    align-items: center;
}

/* ==========================================
   Buttons
   ========================================== */

.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary { background: var(--bg-tertiary); color: var(--text-primary); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--border); }
.btn-danger { background: transparent; color: var(--error); border: 1px solid var(--error); }
.btn-danger:hover { background: var(--error); color: white; }
.btn-small { padding: 0.25rem 0.5rem; font-size: 0.75rem; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }


/* ==========================================
   Layout
   ========================================== */

.main-container {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.sidebar {
    width: 260px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    transition: width 0.3s ease;
}

.sidebar.collapsed { width: 0; overflow: hidden; }

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

.sidebar-title {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.new-chat-btn { margin: 1rem; width: calc(100% - 2rem); }

.chat-history { flex: 1; overflow-y: auto; padding: 0.5rem; }

.chat-history-item {
    padding: 0.75rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    margin-bottom: 0.25rem;
    transition: background 0.2s ease;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
}

.chat-history-item:hover { background: var(--bg-tertiary); }
.chat-history-item.active { background: var(--bg-tertiary); border-left: 3px solid var(--accent); }

.chat-history-item .title {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 0.875rem;
}

.chat-history-item .item-actions {
    display: flex;
    gap: 0.25rem;
    opacity: 0;
    transition: opacity 0.2s;
}

.chat-history-item:hover .item-actions { opacity: 1; }

.chat-history-item .item-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 4px;
    transition: all 0.2s;
}

.chat-history-item .item-btn:hover { color: var(--text-primary); background: rgba(255,255,255,0.1); }
.chat-history-item .item-btn.delete:hover { color: var(--error); background: rgba(255, 107, 107, 0.1); }

.chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem 2rem;
}


/* ==========================================
   Messages
   ========================================== */

.message {
    max-width: 800px;
    margin: 0 auto 1.5rem;
    animation: fadeIn 0.3s ease;
}

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

.message-content {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.message.user .message-avatar { background: var(--accent); }
.message.assistant .message-avatar { background: linear-gradient(135deg, #6366f1, #8b5cf6); }

.message-body { flex: 1; min-width: 0; }

.message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.message-role {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.message-time {
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.message-actions {
    display: flex;
    gap: 0.25rem;
    opacity: 0;
    transition: opacity 0.2s;
}

.message:hover .message-actions { opacity: 1; }

.message-action-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.7rem;
    transition: all 0.2s;
}

.message-action-btn:hover { color: var(--text-primary); background: var(--bg-tertiary); }

.message-text {
    line-height: 1.6;
    word-wrap: break-word;
}

.message-text p { margin-bottom: 0.75rem; }
.message-text p:last-child { margin-bottom: 0; }

.message-text code {
    background: var(--code-bg);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Fira Code', 'Monaco', 'Consolas', monospace;
    font-size: 0.875em;
}

.message-text pre {
    background: var(--code-bg);
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 0.75rem 0;
    position: relative;
}

.message-text pre code { background: none; padding: 0; }

.copy-code-btn {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.7rem;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s;
}

.message-text pre:hover .copy-code-btn { opacity: 1; }
.copy-code-btn:hover { background: var(--border); color: var(--text-primary); }


/* ==========================================
   Thinking Blocks (Collapsible)
   ========================================== */

.thinking-block {
    background: var(--thinking-bg);
    border: 1px solid var(--thinking-border);
    border-radius: 8px;
    margin: 0.75rem 0;
    overflow: hidden;
}

.thinking-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: rgba(74, 74, 106, 0.3);
    cursor: pointer;
    user-select: none;
    transition: background 0.2s;
}

.thinking-header:hover {
    background: rgba(74, 74, 106, 0.5);
}

.thinking-toggle {
    font-size: 0.75rem;
    transition: transform 0.2s;
}

.thinking-block.collapsed .thinking-toggle {
    transform: rotate(-90deg);
}

.thinking-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: #a0a0d0;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.thinking-content {
    padding: 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    border-top: 1px solid var(--thinking-border);
    max-height: 300px;
    overflow-y: auto;
    transition: max-height 0.3s ease, padding 0.3s ease, opacity 0.3s ease;
}

.thinking-block.collapsed .thinking-content {
    max-height: 0;
    padding: 0 1rem;
    opacity: 0;
    border-top: none;
}

/* ==========================================
   Typing Indicator
   ========================================== */

.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 0.5rem 0;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--text-secondary);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out;
}

.typing-indicator span:nth-child(1) { animation-delay: -0.32s; }
.typing-indicator span:nth-child(2) { animation-delay: -0.16s; }

@keyframes bounce {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1); }
}


/* ==========================================
   Input Area
   ========================================== */

.input-area {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 1rem 2rem;
}

.input-container { max-width: 800px; margin: 0 auto; }

.input-top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
    gap: 1rem;
    flex-wrap: wrap;
}

.model-selector {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.model-selector label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.model-selector select {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    padding: 0.35rem 0.75rem;
    font-size: 0.8rem;
    cursor: pointer;
    max-width: 200px;
}

.model-selector select:focus { outline: none; border-color: var(--accent); }

.input-shortcuts {
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.input-shortcuts kbd {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 3px;
    padding: 0.1rem 0.3rem;
    font-family: inherit;
}

.input-wrapper {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1rem;
    transition: border-color 0.2s ease;
}

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

.input-wrapper textarea {
    width: 100%;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    resize: none;
    outline: none;
    line-height: 1.5;
    max-height: 200px;
    min-height: 60px;
}

.input-wrapper textarea::placeholder { color: var(--text-secondary); }

.input-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
}

.input-left { display: flex; gap: 0.5rem; align-items: center; }

.send-btn {
    padding: 0.5rem 1rem;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.send-btn:hover:not(:disabled) { background: var(--accent-hover); }
.send-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.stop-btn {
    padding: 0.5rem 1rem;
    background: var(--error);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    display: none;
    align-items: center;
    gap: 0.5rem;
}

.stop-btn:hover { background: #ff5252; }
.stop-btn.visible { display: flex; }


/* ==========================================
   Modal
   ========================================== */

.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-overlay.active { display: flex; }

.modal {
    background: var(--bg-secondary);
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalSlideIn 0.3s ease;
}

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

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 { font-size: 1.25rem; font-weight: 600; }

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 6px;
    transition: all 0.2s;
    font-size: 1.5rem;
    line-height: 1;
}

.modal-close:hover { color: var(--text-primary); background: var(--bg-tertiary); }

.modal-body { padding: 1.5rem; }

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* ==========================================
   Forms
   ========================================== */

.form-group { margin-bottom: 1.5rem; }

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
}

.form-group small {
    display: block;
    margin-top: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.75rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.toggle-group {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    background: var(--bg-tertiary);
    border-radius: 8px;
    margin-bottom: 1rem;
}

.toggle-label { font-weight: 500; }

.toggle-switch {
    position: relative;
    width: 50px;
    height: 26px;
}

.toggle-switch input { opacity: 0; width: 0; height: 0; }

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--border);
    border-radius: 26px;
    transition: 0.3s;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background: white;
    border-radius: 50%;
    transition: 0.3s;
}

.toggle-switch input:checked + .toggle-slider { background: var(--accent); }
.toggle-switch input:checked + .toggle-slider:before { transform: translateX(24px); }


/* ==========================================
   Toast Notifications
   ========================================== */

.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: slideIn 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(100%); }
    to { opacity: 1; transform: translateX(0); }
}

.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--error); }
.toast.warning { border-left: 3px solid var(--warning); }

.toast-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    margin-left: auto;
}

/* ==========================================
   Dropdown
   ========================================== */

.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    right: 0;
    top: 100%;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    min-width: 160px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    z-index: 100;
}

.dropdown-content.show { display: block; }

.dropdown-item {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    background: none;
    border: none;
    color: var(--text-primary);
    text-align: left;
    cursor: pointer;
    font-size: 0.875rem;
    transition: background 0.2s;
}

.dropdown-item:hover { background: var(--bg-tertiary); }
.dropdown-item:first-child { border-radius: 8px 8px 0 0; }
.dropdown-item:last-child { border-radius: 0 0 8px 8px; }

/* ==========================================
   Empty State
   ========================================== */

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    padding: 2rem;
}

.empty-state-icon {
    width: 80px;
    height: 80px;
    background: var(--bg-tertiary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.empty-state-icon svg { width: 40px; height: 40px; stroke: var(--accent); }
.empty-state h2 { font-size: 1.5rem; margin-bottom: 0.5rem; }
.empty-state p { color: var(--text-secondary); max-width: 400px; }

/* ==========================================
   Responsive
   ========================================== */

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: 0; top: 0; bottom: 0;
        z-index: 100;
        transform: translateX(-100%);
    }
    .sidebar.open { transform: translateX(0); }
    .header { padding: 1rem; }
    .chat-messages { padding: 1rem; }
    .input-area { padding: 1rem; }
    .form-row { grid-template-columns: 1fr; }
    .input-top-bar { flex-direction: column; align-items: flex-start; }
}

/* ==========================================
   Scrollbar
   ========================================== */

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }