/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #8b5cf6;
    --background-dark: #0f172a;
    --background-light: #1e293b;
    --surface: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #475569;
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--background-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow: hidden;
}

/* App Container */
.app-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: 360px;
    background: var(--background-light);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.sidebar-header {
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: white;
}

.logo i {
    font-size: 32px;
}

.logo h1 {
    font-size: 24px;
    font-weight: 700;
}

.sidebar-content {
    padding: 24px;
    overflow-y: auto;
}

.section {
    margin-bottom: 32px;
}

.section h3 {
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Form Elements */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.select-input,
.text-input {
    width: 100%;
    padding: 10px 12px;
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    transition: all 0.3s ease;
}

.select-input:focus,
.text-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.select-input option {
    background: var(--surface);
    color: var(--text-primary);
}

/* Model Info */
.model-info {
    margin-top: 12px;
    padding: 12px;
    background: var(--surface);
    border-radius: 8px;
    font-size: 12px;
    line-height: 1.6;
}

.model-info p {
    margin-bottom: 6px;
    color: var(--text-secondary);
}

.model-info strong {
    color: var(--text-primary);
}

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    margin-left: 6px;
}

.badge.production {
    background: var(--success);
    color: white;
}

.badge.preview {
    background: var(--warning);
    color: white;
}

.badge.vision {
    background: var(--secondary-color);
    color: white;
}

.badge.extended-thinking {
    background: #06b6d4;
    color: white;
}

/* Slider */
.slider-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.slider-container input[type="range"] {
    flex: 1;
    height: 6px;
    background: var(--surface);
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
}

.slider-container input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
}

.slider-container input[type="range"]::-webkit-slider-thumb:hover {
    background: var(--primary-hover);
    transform: scale(1.1);
}

.slider-container input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

.slider-container input[type="range"]:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.slider-container input[type="range"]:disabled::-webkit-slider-thumb {
    background: #666;
    cursor: not-allowed;
}

.slider-container input[type="range"]:disabled::-webkit-slider-thumb:hover {
    transform: none;
    background: #666;
}

.slider-container input[type="range"]:disabled::-moz-range-thumb {
    background: #666;
    cursor: not-allowed;
}

.slider-value {
    min-width: 40px;
    text-align: center;
    font-weight: 600;
    color: var(--primary-color);
    font-size: 13px;
}

/* Checkbox */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.checkbox-label input[type="checkbox"]:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.checkbox-label:has(input[type="checkbox"]:disabled) {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Tooltip */
.tooltip-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--surface);
    color: var(--text-secondary);
    font-size: 10px;
    cursor: help;
    position: relative;
    margin-left: 4px;
}

.tooltip-icon:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    left: 50%;
    bottom: calc(100% + 8px);
    transform: translateX(-50%);
    padding: 8px 12px;
    background: var(--background-dark);
    color: var(--text-primary);
    font-size: 12px;
    border-radius: 6px;
    white-space: normal;
    width: 250px;
    z-index: 1000;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    line-height: 1.4;
}

.tooltip-icon:hover::before {
    content: '';
    position: absolute;
    left: 50%;
    bottom: calc(100% + 2px);
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--border-color);
    z-index: 1001;
}

/* Buttons */
.btn-send {
    padding: 12px 24px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-send:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-send:active {
    transform: translateY(0);
}

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

.btn-secondary {
    width: 100%;
    padding: 12px;
    background: var(--surface);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

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

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chat-container {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.chat-header {
    padding: 20px 32px;
    background: var(--background-light);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chat-header h2 {
    font-size: 20px;
    font-weight: 600;
}

.header-actions {
    display: flex;
    gap: 16px;
    align-items: center;
}

.token-count {
    padding: 6px 12px;
    background: var(--surface);
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
}

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

.welcome-message {
    text-align: center;
    padding: 64px 32px;
    color: var(--text-secondary);
}

.welcome-message i {
    font-size: 64px;
    margin-bottom: 24px;
    color: var(--primary-color);
}

.welcome-message h3 {
    font-size: 24px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.message {
    display: flex;
    padding: 12px 24px;
    animation: slideIn 0.3s ease;
}

.message.user {
    justify-content: flex-end;
}

.message.assistant {
    justify-content: flex-start;
}

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

.message-bubble {
    position: relative;
    max-width: 75%;
    padding: 14px 18px;
    border-radius: 18px;
    word-wrap: break-word;
}

.message.user .message-bubble {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-bottom-right-radius: 4px;
}

.message.assistant .message-bubble {
    background: var(--surface);
    border-bottom-left-radius: 4px;
}

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

.reasoning-text {
    color: #888;
    font-size: 0.9em;
    font-style: italic;
    line-height: 1.5;
    padding: 8px 12px;
    margin-bottom: 12px;
    background: rgba(255, 255, 255, 0.03);
    border-left: 3px solid #555;
    border-radius: 4px;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.reasoning-text::before {
    content: "💭 Reasoning: ";
    font-weight: 600;
    color: #999;
    font-style: normal;
}

/* Thinking Text (Claude Extended Thinking) */
.thinking-text {
    color: #888;
    font-size: 0.9em;
    line-height: 1.5;
    margin-bottom: 12px;
    background: rgba(6, 182, 212, 0.05);
    border-left: 3px solid #06b6d4;
    border-radius: 4px;
    overflow: hidden;
}

.thinking-header {
    font-weight: 600;
    color: #06b6d4;
    padding: 8px 12px;
    background: rgba(6, 182, 212, 0.1);
    border-bottom: 1px solid rgba(6, 182, 212, 0.2);
}

.thinking-content {
    padding: 8px 12px;
    white-space: pre-wrap;
    word-wrap: break-word;
    font-style: italic;
}

/* Claude-Specific Styles */
.claude-info-box {
    background: rgba(6, 182, 212, 0.05);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 16px;
}

.claude-info-box .info-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 12px;
}

.claude-info-box .info-item:last-child {
    margin-bottom: 0;
}

.claude-info-box .info-item i {
    color: #06b6d4;
    font-size: 18px;
    margin-top: 2px;
    flex-shrink: 0;
}

.claude-info-box .info-item strong {
    color: var(--text-primary);
    display: block;
    margin-bottom: 4px;
    font-size: 13px;
}

.claude-info-box .info-item p {
    color: var(--text-secondary);
    font-size: 12px;
    line-height: 1.4;
    margin: 0;
}

.claude-warning {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    border-radius: 6px;
    padding: 12px;
    margin-top: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: fadeIn 0.3s ease;
}

.claude-warning i {
    color: var(--warning);
    font-size: 16px;
    flex-shrink: 0;
}

.claude-warning span {
    color: var(--text-primary);
    font-size: 13px;
    line-height: 1.4;
}

.claude-warning strong {
    color: var(--warning);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.claude-param-hint {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 8px;
    padding: 8px 10px;
    background: rgba(6, 182, 212, 0.08);
    border-left: 3px solid #06b6d4;
    border-radius: 4px;
    font-size: 12px;
    color: var(--text-secondary);
}

.claude-param-hint i {
    color: #06b6d4;
    font-size: 14px;
    flex-shrink: 0;
}

/* Disabled checkbox styling */
.checkbox-label input[type="checkbox"]:disabled + span {
    opacity: 0.5;
    cursor: not-allowed;
}

.checkbox-label input[type="checkbox"]:disabled {
    cursor: not-allowed;
}

.edit-message-btn {
    position: absolute;
    top: -8px;
    right: -8px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: none;
    background: var(--primary-color);
    color: white;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
    transition: all 0.2s ease;
}

.message-bubble:hover .edit-message-btn {
    display: flex;
}

.edit-message-btn:hover {
    background: var(--primary-hover);
    transform: scale(1.1);
}

.message-images {
    display: flex;
    gap: 12px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.message-image {
    max-width: 300px;
    max-height: 300px;
    border-radius: 8px;
    object-fit: cover;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.message-image:hover {
    transform: scale(1.05);
}

.message-meta {
    margin-top: 8px;
    font-size: 11px;
    color: var(--text-secondary);
    display: flex;
    gap: 16px;
}

/* Chat Input */
.chat-input-container {
    background: var(--background-light);
    border-top: 1px solid var(--border-color);
    padding: 24px 32px;
}

.system-prompt-section {
    margin-bottom: 16px;
}

.system-prompt-toggle {
    width: 100%;
    padding: 10px 16px;
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

.system-prompt-toggle:hover {
    background: var(--border-color);
}

.toggle-icon {
    transition: transform 0.3s ease;
}

.system-prompt-toggle.active .toggle-icon {
    transform: rotate(180deg);
}

.system-prompt-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.system-prompt-content.active {
    max-height: 200px;
    margin-top: 12px;
}

.system-prompt-input {
    width: 100%;
    padding: 12px;
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    resize: vertical;
    transition: all 0.3s ease;
}

.system-prompt-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.image-upload-area {
    margin-bottom: 16px;
    padding: 16px;
    background: var(--surface);
    border: 2px dashed var(--border-color);
    border-radius: 8px;
}

.uploaded-images {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}

.uploaded-image {
    position: relative;
    width: 100px;
    height: 100px;
}

.uploaded-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 6px;
}

.remove-image {
    position: absolute;
    top: -6px;
    right: -6px;
    width: 24px;
    height: 24px;
    background: var(--error);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    transition: all 0.3s ease;
}

.remove-image:hover {
    transform: scale(1.1);
}

.image-upload-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--primary-color);
    color: white;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.image-upload-btn:hover {
    background: var(--primary-hover);
}

.message-input-area {
    display: flex;
    gap: 12px;
    align-items: flex-end;
}

.message-input {
    flex: 1;
    padding: 14px 16px;
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    resize: none;
    max-height: 200px;
    transition: all 0.3s ease;
}

.message-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Loading */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--surface);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Scrollbar */
.sidebar::-webkit-scrollbar,
.chat-messages::-webkit-scrollbar {
    width: 8px;
}

.sidebar::-webkit-scrollbar-track,
.chat-messages::-webkit-scrollbar-track {
    background: var(--background-light);
}

.sidebar::-webkit-scrollbar-thumb,
.chat-messages::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.sidebar::-webkit-scrollbar-thumb:hover,
.chat-messages::-webkit-scrollbar-thumb:hover {
    background: var(--surface);
}

/* Login Modal */
.login-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    backdrop-filter: blur(8px);
}

.login-modal-content {
    background: var(--background-light);
    border-radius: 16px;
    padding: 0;
    max-width: 420px;
    width: 90%;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    animation: modalSlideIn 0.3s ease;
}

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

.login-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    padding: 32px 24px;
    text-align: center;
    border-radius: 16px 16px 0 0;
    color: white;
}

.login-header i {
    font-size: 48px;
    margin-bottom: 16px;
}

.login-header h2 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
}

.login-header p {
    font-size: 14px;
    opacity: 0.9;
    margin: 0;
}

.login-body {
    padding: 32px 24px;
}

.login-error {
    color: var(--error);
    font-size: 13px;
    margin-top: 8px;
    min-height: 20px;
}

.btn-login {
    width: 100%;
    padding: 14px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 8px;
}

.btn-login:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-login:active {
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 1024px) {
    .sidebar {
        width: 300px;
    }
}

@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        max-height: 50vh;
    }
    
    .chat-messages {
        padding: 16px;
    }
    
    .chat-input-container {
        padding: 16px;
    }
}