/* --- 1. Root & Theme Variables --- */
:root {
    --primary-color: #4A90E2;
    --primary-hover: #357ABD;
    --secondary-color: #50E3C2;
    --text-color: #333333;
    --text-light: #555555;
    --bg-color: #F8F9FA;
    --card-bg: #FFFFFF;
    --border-color: #EAECEF;
    --shadow-color: rgba(0, 0, 0, 0.05);
}

html[data-theme="dark"] {
    --primary-color: #50E3C2;
    --primary-hover: #38a38a;
    --secondary-color: #4A90E2;
    --text-color: #EAECEF;
    --text-light: #B0B0B0;
    --bg-color: #121212;
    --card-bg: #1E1E1E;
    --border-color: #333333;
    --shadow-color: rgba(0, 0, 0, 0.2);
}

/* --- 2. Global Styles --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Inter', 'Cairo', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: var(--primary-color); transition: color 0.2s ease; }
a:hover { color: var(--primary-hover); }

/* --- 3. Header & Navigation --- */
.main-header {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 10px var(--shadow-color);
    padding: 1rem 5%;
    position: sticky; top: 0; z-index: 1000;
}
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
}
.logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}
.logo i { margin-right: 0.5rem; color: var(--secondary-color); }
.nav-links { display: flex; list-style: none; gap: 1.5rem; }
.nav-links a {
    color: var(--text-light);
    font-weight: 600;
    padding: 0.5rem;
    position: relative;
}
.nav-links a::after {
    content: ''; position: absolute; bottom: -5px;
    left: 0; width: 0; height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-links a.active { color: var(--primary-color); }
.nav-actions { display: flex; align-items: center; gap: 0.75rem; }

.login-btn {
    background-color: var(--primary-color);
    color: #FFF;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: background-color 0.3s ease, transform 0.2s ease;
}
.login-btn:hover {
    background-color: var(--primary-hover);
    color: #FFF;
    transform: translateY(-2px);
}
[dir="rtl"] .login-btn {
    flex-direction: row-reverse;
}


/* --- 4. Theme & Lang Toggle Buttons --- */
.theme-toggle, .lang-toggle {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 40px; height: 40px;
    cursor: pointer; display: flex;
    justify-content: center; align-items: center;
    font-size: 1.1rem; overflow: hidden;
    position: relative;
    transition: background-color 0.3s ease, border-color 0.3s ease;
    color: var(--text-color);
}
.lang-toggle { font-weight: 700; font-family: 'Cairo', sans-serif; }
.theme-toggle i { position: absolute; transition: transform 0.3s ease, opacity 0.3s ease; }
.theme-toggle .fa-sun { opacity: 0; transform: translateY(100%); }
.theme-toggle .fa-moon { opacity: 1; transform: translateY(0); }
html[data-theme="dark"] .theme-toggle .fa-sun { opacity: 1; transform: translateY(0); }
html[data-theme="dark"] .theme-toggle .fa-moon { opacity: 0; transform: translateY(-100%); }

/* --- 5. Hero Section --- */
.hero {
    display: grid; grid-template-columns: 1fr 1fr;
    align-items: center; gap: 2rem;
    max-width: 1400px; margin: 4rem auto; padding: 0 5%;
}
.hero-content h1 { font-size: 3.5rem; font-weight: 700; line-height: 1.2; margin-bottom: 1rem; color: var(--text-color); }
.hero-content p { font-size: 1.2rem; color: var(--text-light); margin-bottom: 2rem; }
.cta-button {
    background-color: var(--primary-color); color: #FFF;
    padding: 0.8rem 1.5rem; border-radius: 8px;
    font-weight: 600; font-size: 1rem;
    transition: background-color 0.3s ease, transform 0.2s ease;
    border: none; cursor: pointer;
}
.cta-button:hover {
    background-color: var(--primary-hover); color: #FFF;
    transform: translateY(-3px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

/* --- 6. 3D Element Styling --- */
.hero-3d-visual { display: flex; justify-content: center; align-items: center; perspective: 1000px; }
.scene { width: 200px; height: 200px; }
.cube {
    width: 100%; height: 100%; position: relative;
    transform-style: preserve-3d;
    animation: rotateCube 20s infinite linear;
    cursor: pointer; /* جديد: تغيير شكل الماوس */
}
/* جديد: كلاس لإيقاف الحركة */
.cube.paused {
    animation-play-state: paused;
}
.face {
    position: absolute; width: 200px; height: 200px;
    background: var(--card-bg); border: 2px solid var(--primary-color);
    box-shadow: 0 0 20px var(--shadow-color), inset 0 0 30px var(--shadow-color);
    font-size: 3rem; font-weight: 700; color: var(--secondary-color);
    display: flex; justify-content: center; align-items: center;
    font-family: 'Courier New', Courier, monospace;
}
.face.front  { transform: rotateY(0deg)   translateZ(100px); }
.face.back   { transform: rotateY(180deg) translateZ(100px); }
.face.right  { transform: rotateY(90deg)  translateZ(100px); }
.face.left   { transform: rotateY(-90deg) translateZ(100px); }
.face.top    { transform: rotateX(90deg)  translateZ(100px); }
.face.bottom { transform: rotateX(-90deg) translateZ(100px); }
@keyframes rotateCube {
    0% { transform: rotateX(0) rotateY(0); }
    100% { transform: rotateX(360deg) rotateY(360deg); }
}

/* --- 7. Course Section --- */
.course-section { max-width: 1400px; margin: 4rem auto; padding: 2rem 5%; }
.course-section h2 { font-size: 2.5rem; text-align: center; margin-bottom: 2.5rem; color: var(--text-color); }
.course-grid { display: grid; justify-content: center; gap: 2rem; }
.course-card {
    background-color: var(--card-bg); border: 1px solid var(--border-color);
    border-radius: 12px; box-shadow: 0 5px 15px var(--shadow-color);
    overflow: hidden; max-width: 400px;
    /* تعديل: إضافة perspective وتغيير الـ transition */
    perspective: 1000px;
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}
.course-card:hover {
    /* تعديل: تأثير الإمالة ثلاثي الأبعاد */
    transform: translateY(-8px) scale(1.03) rotateX(5deg) rotateY(2deg);
    box-shadow: 0 12px 30px var(--shadow-color);
}
.course-image img { width: 100%; height: 220px; object-fit: cover; }
.course-content { padding: 1.5rem; }
.course-level {
    display: inline-block; background-color: var(--secondary-color);
    color: #111; padding: 0.2rem 0.6rem; border-radius: 20px;
    font-size: 0.8rem; font-weight: 700; margin-bottom: 0.75rem;
}
.course-content h3 { font-size: 1.4rem; margin-bottom: 0.5rem; color: var(--text-color); }
.course-content p { font-size: 0.95rem; color: var(--text-light); margin-bottom: 1.5rem; }
.course-footer {
    display: flex; justify-content: space-between; align-items: center;
    border-top: 1px solid var(--border-color); padding-top: 1rem;
    gap: 0.5rem;
}
.course-price { font-size: 1.5rem; font-weight: 700; color: var(--primary-color); }
.enroll-button, .info-button {
    background-color: var(--primary-color); color: #FFF;
    padding: 0.6rem 1rem; border-radius: 8px;
    font-weight: 600; font-size: 0.9rem;
    border: none; cursor: pointer;
}
.enroll-button:hover, .info-button:hover { background-color: var(--primary-hover); color: #FFF; }
.info-button {
    background-color: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}
.info-button:hover {
    background-color: var(--primary-hover);
    color: #FFF;
    border-color: var(--primary-hover);
}

/* --- 8. Footer --- */
.main-footer {
    background-color: var(--card-bg);
    border-top: 1px solid var(--border-color);
    padding: 3rem 5%; text-align: center; margin-top: 4rem;
}
.footer-content h3 { font-size: 1.8rem; margin-bottom: 0.5rem; }
.footer-content p { color: var(--text-light); margin-bottom: 1.5rem; }
.contact-links { display: flex; justify-content: center; gap: 1.5rem; margin-bottom: 2rem; }
.contact-icon { font-size: 1.8rem; color: var(--text-light); transition: color 0.3s ease, transform 0.3s ease; }
.contact-icon:hover { transform: scale(1.2); }
.contact-icon.whatsapp:hover { color: #25D366; }
.contact-icon.telegram:hover { color: #0088CC; }
.contact-icon.email:hover    { color: #EA4335; }
.footer-bottom { font-size: 0.9rem; color: var(--text-light); }

/* --- 9. Responsive Design --- */
@media (max-width: 992px) {
    .hero { grid-template-columns: 1fr; text-align: center; }
    .hero-3d-visual { margin-top: 2rem; }
    .hero-content h1 { font-size: 2.8rem; }
}
@media (max-width: 768px) {
    .nav-links { display: none; }
    .hero-content h1 { font-size: 2.2rem; }
    .login-btn { padding: 0.4rem 0.8rem; font-size: 0.8rem; }
    .course-footer { flex-wrap: wrap; justify-content: center; gap: 0.75rem;}
    .course-price { width: 100%; text-align: center; margin-bottom: 0.5rem;}
    .info-button { flex-grow: 1; }
    .enroll-button { flex-grow: 2; }
}

/* --- 10. RTL Styles --- */
[dir="rtl"] { text-align: right; }
[dir="rtl"] .logo i { margin-right: 0; margin-left: 0.5rem; }
[dir="rtl"] .nav-links a::after { left: auto; right: 0; }
[dir="rtl"] .hero { grid-auto-flow: dense; }
[dir="rtl"] .course-footer { flex-direction: row-reverse; }
@media (max-width: 992px) { [dir="rtl"] .hero { text-align: right; } }
@media (max-width: 768px) { [dir="rtl"] .course-footer { flex-direction: row-reverse; flex-wrap: wrap; } }


/* --- 11. AI Chat & FAB --- */
.help-fab {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 60px;
    height: 60px;
    background-color: var(--primary-color);
    color: #FFF;
    border: none;
    border-radius: 50%;
    font-size: 1.8rem;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    z-index: 998;
    transition: transform 0.3s ease, background-color 0.3s ease;
    overflow: hidden;
}
.help-fab:hover {
    transform: scale(1.1);
    background-color: var(--primary-hover);
}
.help-fab i {
    position: absolute;
    transition: transform 0.3s ease, opacity 0.3s ease;
}
.help-fab .fa-times {
    transform: rotate(45deg) scale(0);
    opacity: 0;
}
.help-fab.open .fa-robot {
    transform: rotate(-45deg) scale(0);
    opacity: 0;
}
.help-fab.open .fa-times {
    transform: rotate(0) scale(1);
    opacity: 1;
}

.ai-chat-window {
    position: fixed;
    bottom: 9rem;
    right: 2rem;
    width: 350px;
    max-height: 500px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 10px 30px var(--shadow-color);
    z-index: 997;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    opacity: 0;
    transform: translateY(20px) scale(0.95);
    visibility: hidden;
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
}
.ai-chat-window.open {
    opacity: 1;
    transform: translateY(0) scale(1);
    visibility: visible;
}
.chat-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    color: var(--primary-color);
}
.chat-header h3 {
    font-size: 1.1rem;
    color: var(--text-color);
}
.chat-body {
    flex-grow: 1;
    padding: 1rem;
    overflow-y: auto;
}
.message {
    padding: 0.75rem 1rem;
    border-radius: 12px;
    margin-bottom: 1rem;
    max-width: 90%;
    line-height: 1.5;
}
.message.bot {
    background-color: var(--bg-color);
    color: var(--text-light);
    border-bottom-left-radius: 0;
    align-self: flex-start;
}
.message.user {
    background-color: var(--primary-color);
    color: #FFF;
    border-bottom-right-radius: 0;
    align-self: flex-end;
    margin-left: auto;
}
.example-questions {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 1rem;
}
.example-q {
    background: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    padding: 0.6rem;
    border-radius: 8px;
    cursor: pointer;
    text-align: left;
    transition: background-color 0.2s ease, color 0.2s ease;
}
.example-q:hover {
    background-color: var(--primary-color);
    color: #FFF;
}
.typing-indicator {
    display: flex;
    align-items: center;
    padding: 0.75rem 0;
}
.typing-indicator span {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--text-light);
    margin: 0 2px;
    animation: bounce 1.4s infinite both;
}
.typing-indicator span:nth-child(1) { animation-delay: 0s; }
.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes bounce {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1.0); }
}

[dir="rtl"] .help-fab { right: auto; left: 2rem; }
[dir="rtl"] .ai-chat-window { right: auto; left: 2rem; }
[dir="rtl"] .message.bot { border-bottom-left-radius: 12px; border-bottom-right-radius: 0; }
[dir="rtl"] .message.user { border-bottom-right-radius: 12px; border-bottom-left-radius: 0; margin-left: 0; margin-right: auto; }
[dir="rtl"] .example-q { text-align: right; }

/* --- 12. Scroll Animation --- */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- 13. Modals --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    z-index: 1001;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}
.modal-overlay.open {
    opacity: 1;
    visibility: visible;
}
.modal-content {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 10px 30px var(--shadow-color);
    width: 90%;
    max-width: 450px;
    position: relative;
    transform: translateY(20px) scale(0.95);
    transition: transform 0.3s ease;
}
.modal-overlay.open .modal-content {
    transform: translateY(0) scale(1);
}
.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: transparent;
    border: none;
    font-size: 2rem;
    color: var(--text-light);
    cursor: pointer;
    line-height: 1;
}
[dir="rtl"] .modal-close {
    right: auto;
    left: 1rem;
}
.modal-content h3 {
    font-size: 1.8rem;
    color: var(--text-color);
    margin-bottom: 1.5rem;
    text-align: center;
}
.info-modal-body p {
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 1rem;
}
.info-modal-body p:last-child {
    margin-bottom: 0;
}

/* --- 14. Auth Forms --- */
.auth-form {
    display: none;
    flex-direction: column;
    gap: 1rem;
}
.auth-form.active {
    display: flex;
}
.auth-form input {
    padding: 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 1rem;
}
.auth-form .cta-button {
    width: 100%;
    margin-top: 0.5rem;
}
.form-toggle-text {
    text-align: center;
    color: var(--text-light);
    font-size: 0.9rem;
    margin-top: 1rem;
}
.form-toggle-text a {
    color: var(--primary-color);
    font-weight: 600;
    cursor: pointer;
}

/* --- 15. Profile Icon --- */
.profile-menu {
    position: relative;
}
.profile-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: #FFF;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: 700;
    font-size: 1.1rem;
    cursor: pointer;
    border: 2px solid var(--border-color);
}
.profile-dropdown {
    position: absolute;
    top: 50px;
    right: 0;
    width: 200px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 5px 15px var(--shadow-color);
    z-index: 1002;
    padding: 0.5rem 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
}
.profile-menu.open .profile-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.dropdown-header {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    color: var(--text-light);
}
.dropdown-username {
    padding: 0.2rem 1rem 0.5rem;
    font-weight: 600;
    color: var(--text-color);
    border-bottom: 1px solid var(--border-color);
}
.dropdown-link {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-light);
}
.dropdown-link i {
    margin-right: 0.5rem;
    color: var(--primary-color);
}
.dropdown-link:hover {
    background-color: var(--bg-color);
    color: var(--text-color);
}
[dir="rtl"] .profile-dropdown {
    right: auto;
    left: 0;
}
[dir="rtl"] .dropdown-link i {
    margin-right: 0;
    margin-left: 0.5rem;
}

/* --- 16. Toast Notification --- */
.toast {
    position: fixed;
    top: 2rem;
    left: 50%;
    transform: translate(-50%, -100px); /* يبدأ مخفي فوق الشاشة */
    background-color: var(--primary-color);
    color: #FFF;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    z-index: 1005;
    font-weight: 600;
    opacity: 0;
    transition: transform 0.4s ease, opacity 0.4s ease;
}
.toast.show {
    transform: translate(-50%, 0);
    opacity: 1;
}

/* كلاس لإخفاء العناصر */
.hidden {
    display: none !important;
}