@font-face {
    font-family: 'Tajawal';
    src: url('fonts/Tajawal-Medium.ttf') format('truetype');
}
@font-face {
    font-family: 'Tajawal';
    src: url('fonts/Tajawal-Bold.ttf') format('truetype');
    font-weight: 700;
}
@font-face {
    font-family: 'Tajawal';
    src: url('fonts/Tajawal-ExtraBold.ttf') format('truetype');
    font-weight: 800;
}

/*    CSS Variables (Design Tokens) */
:root {
    /* Primary Kid-Friendly Colors */
    --color-primary: #FF6B6B;
    /* Red */
    --color-secondary: #4CAF50;
    /* Green */
    --color-accent: #FFD93D;
    /* Yellow */

    /* Background & Text */
    --color-bg-main: #F9FAFB;
    --color-bg-card: #FFFFFF;
    --color-text-main: #333333;
    --color-text-muted: #666666;

    /* UI Elements */
    --color-border: #E5E7EB;
    --shadow-soft: 0 10px 25px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 15px 35px rgba(0, 0, 0, 0.1);

    /* Border Radius (Playful) */
    --radius-sm: 12px;
    --radius-md: 20px;
    --radius-lg: 30px;
    --radius-pill: 50px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --transition-bounce: 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* Reset & Base Styles */
* {/*all element*/
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Tajawal', 'Nunito', sans-serif;
}

body {
    background-color: var(--color-bg-main);
    color: var(--color-text-main);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

.container {/*div in main,div header*/
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.hidden {
    display: none !important;
}

/* Typography & Buttons */
h1,
h2,
h3,
h4 {
    font-weight: 800;
    line-height: 1.2;
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.btn {/*login*/
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: 2px solid transparent;
    border-radius: var(--radius-pill);
    border: none;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-bounce);
}
.btn:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-hover);
}

.btn:active {
    transform: translateY(1px) scale(0.98);
}

.btn-primary, .btn-outline:hover {
    background: var(--color-primary);
    color: white;
}
.btn-secondary {
    background: var(--color-accent);
    color: #333;
}
.btn-outline {
    border-color: var(--color-primary);
    color: var(--color-primary);
}
.btn-large { padding: 15px 30px; font-size: 1.2rem; }
.btn-small { padding: 6px 15px; font-size: 0.9rem; }
.btn-block { width: 100%; }

/* Header & Navigation */
.header {
    background-color: var(--color-bg-card);
    box-shadow: var(--shadow-soft);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 15px 0;
}

.header-content {/*with out burger */
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {/*img and text*/
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {/*img*/
    width: auto;
    max-height: 50px;
    object-fit: contain;
}

.logo-text h1 {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin: 0;
}

.logo-text p {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    font-weight: 600;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-link {
    font-weight: 700;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    right: 0;
    height: 3px;
    background-color: var(--color-primary);
    border-radius: var(--radius-pill);
    transform: scaleX(0);
    transition: transform var(--transition-fast);
}

.nav-link.active::after {
    transform: scaleX(1);
}

.control-btn {/*burger icon*/
    background: var(--color-bg-main);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--color-text-main);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.control-btn:hover {
    background: var(--color-border);
    transform: scale(1.1);
}

.mobile-only { /*burger icon not showing*/
    display: none;
}



/*Sections Base*/
.main-content {/*in all pages*/
    padding: 50px 60px;
}

.section-header { /*header catogries*/
    text-align: center;
    margin-bottom: 40px;
}

.section-header h2 {
    color: var(--color-primary);
}
.section-header p {
    font-size: 1.2rem;
    color: var(--color-secondary);
}

/* Home Section */
.hero {/*parent div*/
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    min-height: 60vh;
}

.hero-text {
    flex: 1;
}

.highlight-text {
    color: var(--color-primary);
}

.hero-text p {
    font-size: 1.2rem;
    color: var(--color-text-muted);
    margin-bottom: 30px;
    line-height: 1.6;
}

.hero-buttons {/*div buttons*/
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.hero-vid {/*div img*/
    flex: 1.5;
    display: flex;
    justify-content: center;
    align-items: center;
}


.hero-vid video {
    width: 100%;
    height: auto;
    object-fit: contain;
   
}


/* Categories Section */
.toast {/*login*/
    background-color: var(--color-accent);
    color: #333;
    padding: 15px 20px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 40px;
    box-shadow: var(--shadow-soft);
    font-weight: 700;
}

.categories-grid {/*parent*/
    display: grid;
    grid-template-columns: repeat(3, auto);
    grid-template-rows: repeat(8,auto);
    gap: 2%;
    margin-bottom: 90px;
}

/*===================
categories,knowdlge
=====================*/
#f {
    grid-row: 1/2;
    grid-column: 1/2;
}
#s {
    grid-row: 1/-1;
    grid-column: 2/3;
}
#t {
    grid-row: 1/2;
    grid-column: 3/4;
}
#r {
    grid-row: 2/-1;
    grid-column: 1/2;
}
#v {
    grid-row: 2/-1;
    grid-column: 3/4;
}

/*===================
learning
=====================*/
#fi {
    grid-row: 1/3;
    grid-column: 1/2;
}
#se {
    grid-row: 1/3;
    grid-column: 2/3;
}
#th {
    grid-row: 1/3;
    grid-column: 3/4;
}
#fo {
    grid-row: 4/-1;
    grid-column: 1/2;
}
#fiv {
    grid-row: 4/-1;
    grid-column: 2/3;
}
#six {
    grid-row: 4/5;
    grid-column: 3/4;
}
#sev {
    grid-row: 5/-1;
    grid-column: 3/4;
}

/*===================
ethics
=====================*/
#five {
    grid-row: 2/3;
    grid-column: 2/-1;
}


.category-card {/*div any category alone*/
    background-color: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: 5px;
    text-align: center;
    box-shadow: var(--shadow-soft);
    position: relative;
    overflow: hidden;
    cursor: pointer;/*to hand*/
    transition: all var(--transition-bounce);
    border: 2px solid transparent;
}

.category-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
    border-color: var(--color-primary);
}

.category-card img {
    width: 100%;
    height: 100%;
    /*margin: 0 auto 20px;*/
    border-radius: var(--radius-lg);
}

.category-card h3 {
    font-size: 1.5rem;
}

.card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 5%;
    opacity: 0;
    transition: opacity var(--transition-base);
    text-align: center;
    box-sizing: border-box;
    overflow: hidden;
}

.category-card:hover .card-overlay {
    opacity: 1;
}

.card-overlay p {
    font-size: clamp(8px, 1.8vw, 1.1rem);
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.4;
    margin: 0;
    width: 100%;
    word-break: break-word;
}

.categories-flex{
    display: flex;
    gap: 20px;
    width: 100%;
    margin: 20px auto;
    overflow-x: auto;
    scroll-behavior: smooth;
    padding: 22px 10px 20px;
}

/* Custom Scrollbar for better appearance */
.categories-flex::-webkit-scrollbar {
    height: 10px;
}
.categories-flex::-webkit-scrollbar-track {
    background: var(--color-bg-main);
    border-radius: var(--radius-pill);
}
.categories-flex::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: var(--radius-pill);
}

.categories-flex img{
    max-height: 400px;
    max-width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    cursor: pointer;/*to hand*/
    transition: all var(--transition-bounce);
    flex-shrink: 0; /* Prevent images from shrinking */
}

.categories-flex img:hover{
    transform: translateY(-10px) scale(1.05);
    box-shadow: var(--shadow-hover);
    border-color: var(--color-primary);
}


/* About Us Section */
.about-container {/*parent div*/
    max-width: 800px;
}

.about-content {/*text,icon*/
    background-color: var(--color-bg-card);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    text-align: center;
}

.about-text p {
    font-size: 1.2rem;
    line-height: 1.8;
    color: var(--color-text-muted);
    margin-bottom: 15px;
}

.about-icons {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 40px;
    flex-wrap: wrap;
}

.about-icon-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.about-icon-item i {
    font-size: 3rem;
    color: var(--color-secondary);
    background-color: rgba(76, 175, 80, 0.1);
    padding: 20px;
    border-radius: 50%;
}

.about-img-item span {
    font-weight: 700;
    font-size: 1.1rem;
}


/* =========================================
   Login Modal
========================================= */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 1;
    transition: opacity var(--transition-base);
    backdrop-filter: blur(5px);
}

.modal-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal {
    background-color: var(--color-bg-card);
    width: 90%;
    max-width: 400px;
    border-radius: var(--radius-lg);
    padding: 40px 30px;
    position: relative;
    box-shadow: var(--shadow-hover);
    transform: scale(1);
    transition: transform var(--transition-bounce);
}

.modal-overlay.hidden .modal {
    transform: scale(0.8);
}

.close-btn {
    position: absolute;
    top: 15px;
    right: 15px; /* RTL context */
    background: var(--color-bg-main);
    border: none;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    font-size: 1.2rem;
    color: var(--color-text-main);
    cursor: pointer;
    transition: background var(--transition-fast);
}

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

.modal-header {
    text-align: center;
    margin-bottom: 30px;
}

.modal-header h2 {
    color: var(--color-primary);
    font-size: 2rem;
    margin-bottom: 5px;
}

.modal-header p {
    color: var(--color-text-muted);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 700;
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    background-color: var(--color-bg-main);
    color: var(--color-text-main);
    transition: border-color var(--transition-fast);
    outline: none;
}

.form-group input:focus {
    border-color: var(--color-primary);
}

/* =========================================
   Footer
========================================= */
footer {
    background-color: var(--color-bg-card);
    text-align: center;
    padding: 20px 0;
    margin-top: 40px;
    color: var(--color-text-muted);
    font-weight: 600;
}

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

/* 1. هواتف صغيرة جداً (أصغر من 320px) */
@media (max-width: 319px) {
    .container { padding: 0 10px; }
    .main-content { padding: 20px 10px; }
    h2 { font-size: 1.5rem; }
    .hero-text p { font-size: 0.9rem; }
    .btn { padding: 8px 15px; font-size: 0.85rem; }
    .nav-links { display: none; }
}

/* 2. هواتف صغيرة (320px - 374px) */
@media (min-width: 320px) and (max-width: 374px) {
    .container { padding: 0 15px; }
    .main-content { padding: 30px 15px; }
    h2 { font-size: 1.8rem; }
    .hero-text p { font-size: 1rem; }
    .btn { padding: 10px 18px; font-size: 0.9rem; }
}

/* 3. هواتف متوسطة (375px - 424px) */
@media (min-width: 375px) and (max-width: 424px) {
    .container { padding: 0 15px; }
    .main-content { padding: 30px 20px; }
    h2 { font-size: 2rem; }
}

/* 4. هواتف كبيرة (425px - 575px) */
@media (min-width: 425px) and (max-width: 575px) {
    .container { padding: 0 20px; }
    .main-content { padding: 40px 20px; }
    h2 { font-size: 2.2rem; }
}

/* 5. تابلت صغير (576px - 767px) */
@media (min-width: 576px) and (max-width: 767px) {
    .container { padding: 0 20px; }
    .main-content { padding: 40px 30px; }
}

/* Shared Mobile Nav Styles (0px - 991px) */
@media (max-width: 991px) {
    .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        position: absolute;
        top: 100%;
        left: 0;
        background-color: var(--color-bg-card);
        padding: 20px;
        box-shadow: 0 10px 15px rgba(0,0,0,0.1);
        gap: 15px;
        z-index: 99;
    }
    .nav-links.active { display: flex; }
    .mobile-only { display: flex; }
    .hero {
        flex-direction: column;
        text-align: center;
        margin-top: 20px;
    }
    .hero-buttons { justify-content: center; }
    .toast {
        flex-direction: column;
        text-align: center;
        gap: 10px;
    }
}

/* 6. تابلت (768px - 991px) */
@media (min-width: 768px) and (max-width: 991px) {
    .container { padding: 0 30px; }
    .main-content { padding: 50px 40px; }
}

/* 7. لابتوب صغير (992px - 1199px) */
@media (min-width: 992px) and (max-width: 1199px) {
    .container { max-width: 960px; }
    .categories-grid { gap: 15px; }
}

/* 8. لابتوب/سطح مكتب (1200px - 1399px) */
@media (min-width: 1200px) and (max-width: 1399px) {
    .container { max-width: 1140px; }
}

/* 9. شاشات كبيرة (1400px - 1599px) */
@media (min-width: 1400px) and (max-width: 1599px) {
    .container { max-width: 1320px; }
    h2 { font-size: 3rem; }
    .hero-text p { font-size: 1.3rem; }
    .main-content { padding: 60px 80px; }
}

/* 10. شاشات 2K (1600px - 1919px) */
@media (min-width: 1600px) and (max-width: 1919px) {
    .container { max-width: 1500px; }
    h2 { font-size: 3.5rem; }
    .hero-text p { font-size: 1.4rem; }
    .btn-large { padding: 18px 35px; font-size: 1.3rem; }
    .main-content { padding: 80px 100px; }
    .categories-grid { gap: 3%; }
}

/* 11. شاشات 4K (1920px فأكثر) */
@media (min-width: 1920px) {
    .container { max-width: 1800px; }
    h2 { font-size: 4rem; }
    .hero-text p { font-size: 1.6rem; }
    .btn-large { padding: 20px 40px; font-size: 1.5rem; }
    .main-content { padding: 100px 120px; }
    .category-card h3 { font-size: 2rem; }
    .card-overlay p { font-size: 1.5rem; }
    .logo-text h1 { font-size: 2.5rem; }
    .logo-text p { font-size: 1.2rem; }
    .nav-link { font-size: 1.3rem; }
}

/* =========================================
   Lightbox Styles
========================================= */
.lightbox {
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

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

.lightbox-content {
    max-width: 90%;
    max-height: 90%;
    border-radius: 10px;
    box-shadow: 0 5px 25px rgba(0,0,0,0.5);
    transition: transform 0.3s ease;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 30px;
    color: white;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
    z-index: 1001;
}

.lightbox-close:hover {
    color: var(--color-primary);
}

.lightbox-prev, .lightbox-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: none;
    font-size: 24px;
    width: 50px;
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    border-radius: 50%;
    transition: background 0.3s ease;
    z-index: 1001;
}

.lightbox-prev:hover, .lightbox-next:hover {
    background: var(--color-primary);
}

/* RTL navigation arrows */
.lightbox-prev {
    right: 20px; /* Right for previous in RTL */
}

.lightbox-next {
    left: 20px; /* Left for next in RTL */
}

/* =========================================
   Locked System
========================================= */
.locked-card {
    position: relative;
}

.locked-card::after {
    content: '\f023'; /* FontAwesome lock icon */
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 4rem;
    color: rgba(255, 255, 255, 0.9);
    background: rgba(0, 0, 0, 0.5);
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    pointer-events: none;
    z-index: 10;
}