/* =================================================================== */
/* MGD AI - Enhanced Stylesheet (v18.0 - نظام التفكير المحسن) */
/* =================================================================== */

:root {
    /* الألوان الأساسية - النسخة الفاتحة */
    --primary-bg: #ffffff;
    --secondary-bg: #f8f9fa;
    --tertiary-bg: #e9ecef;
    --primary-text: #2d3748;
    --secondary-text: #718096;
    --accent-color: #007AFF;
    --accent-hover: #0056b3;
    --success-color: #48bb78;
    --warning-color: #ed8936;
    --error-color: #f56565;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    
    /* الألوان الأساسية - النسخة الداكنة */
    --primary-bg-dark: #1a202c;
    --secondary-bg-dark: #2d3748;
    --tertiary-bg-dark: #4a5568;
    --primary-text-dark: #f7fafc;
    --secondary-text-dark: #cbd5e0;
    --border-color-dark: #4a5568;
    --shadow-dark: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    
    /* ألوان التفكير المتقدم */
    --thinking-primary: #667eea;
    --thinking-secondary: #764ba2;
    --thinking-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --deep-thinking-bg: rgba(102, 126, 234, 0.1);
    --deep-thinking-border: rgba(102, 126, 234, 0.3);
    
    /* التوقيتات والحركات */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --typing-speed: 0.03s;
    --thinking-speed: 1.5s;
}

/* === إعادة الضبط الأساسية === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans Arabic", Helvetica, Arial, sans-serif;
    background-color: var(--primary-bg);
    color: var(--primary-text);
    line-height: 1.6;
    overflow: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* === النسخة الداكنة === */
body.dark-theme {
    background-color: var(--primary-bg-dark);
    color: var(--primary-text-dark);
}

/* === الحاوية الرئيسية === */
.app-container {
    display: flex;
    flex-direction: column;
    width: 100vw;
    height: 100vh;
    background-color: var(--primary-bg);
    position: relative;
}

body.dark-theme .app-container {
    background-color: var(--primary-bg-dark);
}

/* === الشريط العلوي === */
.top-bar {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--primary-bg);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: all var(--transition-normal);
}

body.dark-theme .top-bar {
    border-bottom-color: var(--border-color-dark);
    background-color: var(--primary-bg-dark);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

.chat-info {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
    justify-content: center;
}

.header-logo {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    object-fit: cover;
}

.chat-info h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-text);
}

body.dark-theme .chat-info h3 {
    color: var(--primary-text-dark);
}

/* === أزرار الشريط العلوي === */
.icon-btn {
    background: transparent;
    border: none;
    color: var(--secondary-text);
    width: 44px;
    height: 44px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 18px;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

body.dark-theme .icon-btn {
    color: var(--secondary-text-dark);
}

.icon-btn:hover {
    background-color: var(--tertiary-bg);
    color: var(--accent-color);
    transform: translateY(-1px);
}

body.dark-theme .icon-btn:hover {
    background-color: var(--tertiary-bg-dark);
}

/* === منطقة الدردشة === */
.chat-area {
    flex: 1;
    overflow-y: auto;
    padding: 20px 16px;
    background-color: var(--secondary-bg);
    position: relative;
}

body.dark-theme .chat-area {
    background-color: var(--secondary-bg-dark);
}

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

.chat-area::-webkit-scrollbar-track {
    background: transparent;
}

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

body.dark-theme .chat-area::-webkit-scrollbar-thumb {
    background: var(--border-color-dark);
}

/* === الرسائل === */
.message-wrapper {
    display: flex;
    gap: 16px;
    padding: 16px;
    max-width: 800px;
    margin: 0 auto 20px;
    animation: messageAppear 0.4s ease;
    position: relative;
}

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

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

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--thinking-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 16px;
    flex-shrink: 0;
    font-weight: 600;
    box-shadow: var(--shadow);
}

.message-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.message-content {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
    min-width: 0;
}

.message-sender {
    font-weight: 600;
    font-size: 14px;
    color: var(--secondary-text);
    margin-bottom: 4px;
}

body.dark-theme .message-sender {
    color: var(--secondary-text-dark);
}

.message-bubble {
    padding: 16px 20px;
    border-radius: 18px;
    background-color: var(--primary-bg);
    color: var(--primary-text);
    word-wrap: break-word;
    line-height: 1.7;
    font-size: 16px;
    white-space: pre-wrap;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    position: relative;
}

body.dark-theme .message-bubble {
    background-color: var(--secondary-bg-dark);
    color: var(--primary-text-dark);
    border-color: var(--border-color-dark);
}

/* === رسائل التفكير المحسنة === */
.thinking-message {
    opacity: 0.9;
}

.thinking-bubble {
    background: var(--deep-thinking-bg) !important;
    border: 2px solid var(--deep-thinking-border) !important;
    padding: 20px;
}

.thinking-sequence {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.thinking-step {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 12px;
    border-left: 4px solid var(--thinking-primary);
    animation: thinkingPulse 2s infinite;
}

body.dark-theme .thinking-step {
    background: rgba(255, 255, 255, 0.1);
}

@keyframes thinkingPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

.thinking-step .spinner {
    width: 20px;
    height: 20px;
    border: 3px solid var(--thinking-primary);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 1.5s linear infinite;
    flex-shrink: 0;
    margin-top: 2px;
}

.thinking-step span {
    font-size: 15px;
    color: var(--primary-text);
    font-weight: 500;
    line-height: 1.5;
}

body.dark-theme .thinking-step span {
    color: var(--primary-text-dark);
}

/* === مؤشر التفكير المتقدم === */
.deep-thinking-indicator {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: var(--deep-thinking-bg);
    border-radius: 16px;
    border: 2px solid var(--deep-thinking-border);
    margin-bottom: 16px;
}

.deep-thinking-dots {
    display: flex;
    gap: 4px;
}

.deep-thinking-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--thinking-primary);
    animation: thinkingBounce 1.4s infinite ease-in-out;
}

.deep-thinking-dot:nth-child(1) { animation-delay: -0.32s; }
.deep-thinking-dot:nth-child(2) { animation-delay: -0.16s; }

@keyframes thinkingBounce {
    0%, 80%, 100% { transform: scale(0.8); opacity: 0.5; }
    40% { transform: scale(1.2); opacity: 1; }
}

/* === الكتابة التدريجية === */
.typing-indicator {
    display: inline-block;
    position: relative;
}

.typing-indicator::after {
    content: '|';
    animation: blinkCaret 0.7s infinite;
    color: var(--accent-color);
    font-weight: bold;
}

@keyframes blinkCaret {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.typed-message {
    animation: typewriter 0.05s linear;
}

@keyframes typewriter {
    from { 
        max-height: 0;
        opacity: 0;
    }
    to { 
        max-height: 1000px;
        opacity: 1;
    }
}

/* === شريط أدوات الرد === */
.reply-toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
    opacity: 0.7;
    transition: opacity var(--transition-fast);
}

.reply-toolbar:hover {
    opacity: 1;
}

body.dark-theme .reply-toolbar {
    border-top-color: var(--border-color-dark);
}

.toolbar-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--secondary-text);
    font-size: 16px;
    padding: 8px;
    border-radius: 8px;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

body.dark-theme .toolbar-btn {
    color: var(--secondary-text-dark);
}

.toolbar-btn:hover {
    background-color: var(--tertiary-bg);
    color: var(--accent-color);
    transform: translateY(-1px);
}

body.dark-theme .toolbar-btn:hover {
    background-color: var(--tertiary-bg-dark);
}

.toolbar-btn.active {
    color: var(--accent-color);
    background-color: var(--tertiary-bg);
}

/* === منطقة الإدخال === */
.input-area-wrapper {
    padding: 20px 16px;
    background-color: var(--primary-bg);
    border-top: 1px solid var(--border-color);
    position: sticky;
    bottom: 0;
}

body.dark-theme .input-area-wrapper {
    background-color: var(--primary-bg-dark);
    border-top-color: var(--border-color-dark);
}

.input-area {
    max-width: 800px;
    margin: 0 auto;
    padding: 12px;
    display: flex;
    align-items: flex-end;
    gap: 12px;
    border: 2px solid var(--border-color);
    border-radius: 24px;
    background-color: var(--primary-bg);
    box-shadow: var(--shadow);
    transition: all var(--transition-normal);
}

body.dark-theme .input-area {
    border-color: var(--border-color-dark);
    background-color: var(--secondary-bg-dark);
}

.input-area:focus-within {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

#message-input {
    flex: 1;
    padding: 12px 4px;
    border: none;
    background: transparent;
    color: var(--primary-text);
    font-size: 16px;
    resize: none;
    line-height: 1.5;
    max-height: 120px;
    overflow-y: auto;
    outline: none;
    font-family: inherit;
}

body.dark-theme #message-input {
    color: var(--primary-text-dark);
}

#message-input::placeholder {
    color: var(--secondary-text);
}

body.dark-theme #message-input::placeholder {
    color: var(--secondary-text-dark);
}

.input-icon-btn, .send-btn {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
    background-color: transparent;
    color: var(--secondary-text);
}

body.dark-theme .input-icon-btn, 
body.dark-theme .send-btn {
    color: var(--secondary-text-dark);
}

.input-icon-btn:hover, 
.send-btn:hover {
    background-color: var(--tertiary-bg);
    color: var(--accent-color);
    transform: translateY(-1px);
}

body.dark-theme .input-icon-btn:hover, 
body.dark-theme .send-btn:hover {
    background-color: var(--tertiary-bg-dark);
}

.send-btn.visible {
    background-color: var(--accent-color);
    color: white;
}

.send-btn.visible:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
}

/* === القائمة الجانبية === */
.sidebar-overlay {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    transition: right var(--transition-normal);
    display: flex;
}

.sidebar-overlay.active {
    right: 0;
}

.sidebar {
    width: 320px;
    height: 100%;
    background: var(--primary-bg);
    margin-right: auto;
    display: flex;
    flex-direction: column;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
    transform: translateX(100%);
    transition: transform var(--transition-normal);
}

.sidebar-overlay.active .sidebar {
    transform: translateX(0);
}

body.dark-theme .sidebar {
    background: var(--primary-bg-dark);
}

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

body.dark-theme .sidebar-header {
    border-bottom-color: var(--border-color-dark);
}

.sidebar-header h2 {
    font-size: 20px;
    font-weight: 600;
    flex: 1;
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.sidebar-action-btn {
    width: 100%;
    padding: 16px;
    background: var(--secondary-bg);
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    color: var(--secondary-text);
    font-size: 16px;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}

body.dark-theme .sidebar-action-btn {
    background: var(--secondary-bg-dark);
    border-color: var(--border-color-dark);
    color: var(--secondary-text-dark);
}

.sidebar-action-btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    transform: translateY(-1px);
}

.sidebar-section {
    margin-bottom: 32px;
}

.sidebar-section h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--secondary-text);
}

body.dark-theme .sidebar-section h3 {
    color: var(--secondary-text-dark);
}

.category-buttons {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.api-category-btn {
    width: 100%;
    padding: 14px 16px;
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--primary-text);
    font-size: 15px;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 12px;
    text-align: right;
}

body.dark-theme .api-category-btn {
    background: var(--secondary-bg-dark);
    border-color: var(--border-color-dark);
    color: var(--primary-text-dark);
}

.api-category-btn:hover {
    background: var(--tertiary-bg);
    border-color: var(--accent-color);
    transform: translateX(-4px);
}

body.dark-theme .api-category-btn:hover {
    background: var(--tertiary-bg-dark);
}

/* === النوافذ المنبثقة === */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    padding: 20px;
}

.overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--primary-bg);
    border-radius: 20px;
    box-shadow: var(--shadow);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow: hidden;
    transform: scale(0.9);
    transition: transform var(--transition-normal);
}

.overlay.active .modal {
    transform: scale(1);
}

body.dark-theme .modal {
    background: var(--primary-bg-dark);
}

.modal-header {
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: between;
}

body.dark-theme .modal-header {
    border-bottom-color: var(--border-color-dark);
}

.modal-header h2 {
    font-size: 20px;
    font-weight: 600;
    flex: 1;
}

.modal-content {
    padding: 24px;
    max-height: 60vh;
    overflow-y: auto;
}

.modal-footer {
    padding: 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

body.dark-theme .modal-footer {
    border-top-color: var(--border-color-dark);
}

/* === الأزرار === */
.btn-primary, .btn-secondary {
    padding: 12px 24px;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

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

body.dark-theme .btn-secondary {
    background: var(--secondary-bg-dark);
    border-color: var(--border-color-dark);
    color: var(--secondary-text-dark);
}

.btn-secondary:hover {
    background: var(--tertiary-bg);
    transform: translateY(-1px);
}

body.dark-theme .btn-secondary:hover {
    background: var(--tertiary-bg-dark);
}

/* === الإعدادات === */
.settings-options {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.setting-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0;
}

.setting-item span {
    font-size: 15px;
    color: var(--primary-text);
}

body.dark-theme .setting-item span {
    color: var(--primary-text-dark);
}

/* === التبديل (Switch) === */
.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 28px;
}

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

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-color);
    transition: var(--transition-normal);
    border-radius: 34px;
}

body.dark-theme .slider {
    background-color: var(--border-color-dark);
}

.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: var(--transition-normal);
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--accent-color);
}

input:checked + .slider:before {
    transform: translateX(22px);
}

/* === التكيف مع الشاشات الصغيرة === */
@media (max-width: 768px) {
    .header-content {
        padding: 0 8px;
    }
    
    .chat-area {
        padding: 16px 8px;
    }
    
    .message-wrapper {
        padding: 12px 8px;
        gap: 12px;
    }
    
    .message-avatar {
        width: 32px;
        height: 32px;
    }
    
    .input-area-wrapper {
        padding: 16px 8px;
    }
    
    .sidebar {
        width: 280px;
    }
    
    .modal {
        margin: 20px;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .message-bubble {
        padding: 14px 16px;
        font-size: 15px;
    }
    
    .input-area {
        padding: 10px;
    }
    
    .sidebar {
        width: 100%;
    }
}

/* === الرسوم المتحركة الإضافية === */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

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

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

@keyframes bounce {
    0%, 20%, 53%, 80%, 100% {
        transform: translate3d(0,0,0);
    }
    40%, 43% {
        transform: translate3d(0,-8px,0);
    }
    70% {
        transform: translate3d(0,-4px,0);
    }
    90% {
        transform: translate3d(0,-2px,0);
    }
}

/* === تحسينات الأداء === */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* === دعم متصفحات قديمة === */
@supports not (backdrop-filter: blur(10px)) {
    .top-bar {
        background-color: var(--primary-bg);
    }
    
    body.dark-theme .top-bar {
        background-color: var(--primary-bg-dark);
    }
}