/* 
   إعدادات الألوان والتصميم الأساسية للمنصة
   تم اختيار درجات ألوان زاهية وطفولية مريحة للعين وتثير الفضول والبهجة
*/
:root {
    --primary-color: #ff6b81;    /* وردي لطيف */
    --secondary-color: #4cd137;  /* أخضر تفاحي زاهي */
    --accent-color: #00a8ff;     /* أزرق سماوي منعش */
    --warning-color: #e1b12c;    /* أصفر دافئ */
    --error-color: #ff4757;      /* أحمر تنبيهي */
    --bg-gradient: linear-gradient(135deg, #e8f4fd 0%, #fef1f3 100%);
    --card-bg: rgba(255, 255, 255, 0.9);
    --border-radius-lg: 30px;
    --border-radius-md: 20px;
    --font-family: 'Baloo Bhaijaan 2', system-ui, -apple-system, sans-serif;
    --box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: var(--font-family);
    -webkit-tap-highlight-color: transparent;
}

body {
    background: var(--bg-gradient);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
    position: relative;
    padding: 20px;
    color: #2f3640;
}

/* خلفية الفقاعات الطائرة */
.bubbles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 0;
    pointer-events: none;
}

.bubble {
    position: absolute;
    bottom: -100px;
    font-size: 2.5rem;
    animation: floatUp 15s infinite linear;
    opacity: 0.15;
    user-select: none;
}

/* توزيع الفقاعات بمواقع وأوقات بدء عشوائية */
.bubble:nth-child(1) { left: 10%; animation-duration: 12s; animation-delay: 0s; font-size: 3rem; }
.bubble:nth-child(2) { left: 25%; animation-duration: 18s; animation-delay: 2s; font-size: 2.2rem; }
.bubble:nth-child(3) { left: 45%; animation-duration: 14s; animation-delay: 4s; font-size: 3.5rem; }
.bubble:nth-child(4) { left: 60%; animation-duration: 16s; animation-delay: 1s; font-size: 2.6rem; }
.bubble:nth-child(5) { left: 75%; animation-duration: 20s; animation-delay: 5s; font-size: 3.2rem; }
.bubble:nth-child(6) { left: 90%; animation-duration: 13s; animation-delay: 3s; font-size: 2rem; }
.bubble:nth-child(7) { left: 5%; animation-duration: 22s; animation-delay: 7s; font-size: 2.8rem; }

@keyframes floatUp {
    0% {
        transform: translateY(0) rotate(0deg) scale(0.8);
        opacity: 0;
    }
    10% {
        opacity: 0.25;
    }
    90% {
        opacity: 0.25;
    }
    100% {
        transform: translateY(-110vh) rotate(360deg) scale(1.2);
        opacity: 0;
    }
}

/* هيكل الحاوية الرئيسي */
.container {
    width: 100%;
    max-width: 1000px;
    margin: auto;
    z-index: 10;
    transition: transform 0.5s ease, opacity 0.5s ease;
}

.hide {
    display: none !important;
    opacity: 0;
    transform: translateY(30px);
    pointer-events: none;
}

.active-view {
    display: block;
    animation: slideUp 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* تصميم البطاقة الرئيسي */
.card {
    background: var(--card-bg);
    border: 8px solid #ffffff;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--box-shadow);
    padding: 40px;
    text-align: center;
    position: relative;
    backdrop-filter: blur(15px);
    transition: var(--transition);
}

/* تأثير التوهج والنبض اللطيف لبطاقة الدخول */
.pulse-glow {
    animation: cardPulse 4s infinite ease-in-out;
}

@keyframes cardPulse {
    0%, 100% {
        box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08), 0 0 0 rgba(255, 107, 129, 0.1);
    }
    50% {
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12), 0 0 25px rgba(255, 107, 129, 0.25);
        transform: translateY(-2px);
    }
}

.login-card {
    max-width: 500px;
    margin: 0 auto;
}

.character-icon {
    font-size: 5rem;
    margin-bottom: 15px;
    display: inline-block;
    animation: wiggle 3s infinite ease-in-out;
}

@keyframes wiggle {
    0%, 100% { transform: rotate(0deg) scale(1); }
    25% { transform: rotate(-8deg) scale(1.05); }
    75% { transform: rotate(8deg) scale(1.05); }
}

h1 {
    font-size: 2.3rem;
    color: #ff5252;
    margin-bottom: 5px;
    font-weight: 800;
    text-shadow: 2px 2px 0px #ffffff, 4px 4px 0px rgba(0, 0, 0, 0.05);
}

.subtitle {
    font-size: 1.1rem;
    color: #718093;
    margin-bottom: 30px;
}

/* حقول المدخلات */
.form-group {
    margin-bottom: 25px;
    text-align: right;
}

label {
    display: block;
    font-size: 1.2rem;
    font-weight: 600;
    color: #353b48;
    margin-bottom: 10px;
    margin-right: 10px;
}

input[type="text"] {
    width: 100%;
    padding: 16px 25px;
    font-size: 1.5rem;
    font-weight: 800;
    text-align: center;
    letter-spacing: 2px;
    border: 4px solid #dcdde1;
    border-radius: var(--border-radius-md);
    outline: none;
    transition: var(--transition);
    background: #f5f6fa;
    color: #ff5252;
}

input[type="text"]:focus {
    border-color: var(--primary-color);
    background: #ffffff;
    box-shadow: 0 0 15px rgba(255, 107, 129, 0.2);
    transform: scale(1.02);
}

/* رسالة الخطأ الكرتونية */
.error-msg {
    background: #ffeb3b;
    border: 3px solid #ff5252;
    border-radius: var(--border-radius-md);
    padding: 12px 20px;
    color: #c0392b;
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-6px); }
    40%, 80% { transform: translateX(6px); }
}

/* الأزرار المرحة */
.btn {
    width: 100%;
    padding: 18px 25px;
    font-size: 1.4rem;
    font-weight: 800;
    color: white;
    background: linear-gradient(135deg, #ff6b81 0%, #ff4757 100%);
    border: none;
    border-bottom: 6px solid #cf3545;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    outline: none;
    position: relative;
    overflow: hidden;
    transition: all 0.1s ease;
    box-shadow: 0 8px 20px rgba(255, 71, 87, 0.35);
}

.btn:hover {
    transform: translateY(2px);
    border-bottom-width: 4px;
    box-shadow: 0 6px 15px rgba(255, 71, 87, 0.4);
}

.btn:active {
    transform: translateY(6px);
    border-bottom-width: 0px;
    box-shadow: 0 2px 5px rgba(255, 71, 87, 0.2);
}

/* تذييل الكرت لجهاز الدخول */
.device-info-footer {
    margin-top: 25px;
    font-size: 0.95rem;
    color: #8c7ae6;
    background: #efeefa;
    padding: 10px 15px;
    border-radius: 50px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: 2px dashed #b8b5ff;
}

/* لوحة التحكم (الرئيسية) */
.dashboard-header {
    text-align: center;
    margin-bottom: 40px;
    z-index: 10;
}

.welcome-badge {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.welcome-badge .avatar {
    font-size: 4.5rem;
    animation: bounce 2s infinite ease-in-out;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

.dashboard-header h2 {
    font-size: 2.2rem;
    color: #2f3640;
    font-weight: 800;
}

.dashboard-header h2 strong {
    color: #ff5252;
}

.tagline {
    font-size: 1.2rem;
    color: #718093;
}

/* شبكة المواد الدراسية */
.subjects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
    width: 100%;
}

.subject-card {
    cursor: pointer;
    background: var(--card-bg);
    border: 6px solid #ffffff;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--box-shadow);
    padding: 35px 25px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.subject-card:hover {
    transform: translateY(-15px) scale(1.03);
    box-shadow: 0 25px 45px rgba(0, 0, 0, 0.12);
}

.subject-icon {
    font-size: 5rem;
    margin-bottom: 20px;
    transition: transform 0.3s ease;
}

.subject-card:hover .subject-icon {
    transform: scale(1.15) rotate(5deg);
}

.subject-card h3 {
    font-size: 1.6rem;
    margin-bottom: 12px;
    font-weight: 800;
}

.subject-card p {
    font-size: 1rem;
    color: #7f8c8d;
    line-height: 1.6;
    margin-bottom: 25px;
    flex-grow: 1;
}

/* تلوين الكروت الفردية بمؤثرات طفولية */
.subject-card.reading {
    border-color: #ffedd5;
    background: linear-gradient(to bottom, #ffffff 60%, #fff7ed 100%);
}
.subject-card.reading h3 { color: #f97316; }
.subject-card.reading .go-btn { background: #f97316; box-shadow: 0 6px 15px rgba(249, 115, 22, 0.3); border-bottom: 4px solid #c2410c; }

.subject-card.math {
    border-color: #e0f2fe;
    background: linear-gradient(to bottom, #ffffff 60%, #f0f9ff 100%);
}
.subject-card.math h3 { color: #0284c7; }
.subject-card.math .go-btn { background: #0284c7; box-shadow: 0 6px 15px rgba(2, 132, 199, 0.3); border-bottom: 4px solid #0369a1; }

.subject-card.english {
    border-color: #fae8ff;
    background: linear-gradient(to bottom, #ffffff 60%, #fdf4ff 100%);
}
.subject-card.english h3 { color: #a21caf; }
.subject-card.english .go-btn { background: #a21caf; box-shadow: 0 6px 15px rgba(162, 28, 175, 0.3); border-bottom: 4px solid #86198f; }

.go-btn {
    display: inline-block;
    padding: 12px 24px;
    font-size: 1.1rem;
    font-weight: 800;
    color: white;
    border-radius: 50px;
    text-decoration: none;
    transition: var(--transition);
    width: 100%;
}

.subject-card:hover .go-btn {
    transform: scale(1.05);
}

/* زر تسجيل الخروج */
.logout-btn {
    display: block;
    margin: 20px auto 0;
    padding: 12px 30px;
    font-size: 1.1rem;
    font-weight: 700;
    color: #7f8c8d;
    background: white;
    border: 3px solid #dcdde1;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
}

.logout-btn:hover {
    color: var(--error-color);
    border-color: var(--error-color);
    background: #fff5f5;
    transform: scale(1.05);
}

/* شاشة التحميل الدائرية */
.loader-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.95);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(10px);
}

.loader-spinner {
    text-align: center;
}

.spinner-circle {
    width: 80px;
    height: 80px;
    border: 10px solid #f3f3f3;
    border-top: 10px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
}

.loader-spinner p {
    font-size: 1.3rem;
    font-weight: 700;
    color: #2f3640;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* الهواتف والشاشات الصغيرة */
@media (max-width: 600px) {
    body {
        padding: 10px;
    }
    .card {
        padding: 25px 15px;
    }
    h1 {
        font-size: 1.8rem;
    }
    .dashboard-header h2 {
        font-size: 1.6rem;
    }
    .subjects-grid {
        grid-template-columns: 1fr;
    }
}