/* ===== أنماط المستويات المحسنة ===== */

/* ===== رأس المستوى المحسن ===== */
.level-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 4rem 0;
    margin-bottom: 3rem;
    text-align: center;
    border-radius: 0 0 25px 25px;
    position: relative;
    overflow: hidden;
}

.level-header::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 120" preserveAspectRatio="none"><path d="M1200 120L0 16.48 0 0 1200 0 1200 120z" fill="white"/></svg>');
    background-size: 100% 100px;
    background-position: bottom;
    background-repeat: no-repeat;
    opacity: 0.1;
}

.level-header h2 {
    font-size: 3rem;
    margin-bottom: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    font-weight: 800;
    position: relative;
}

.level-header p {
    font-size: 1.4rem;
    opacity: 0.95;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.6;
    font-weight: 400;
    position: relative;
}

/* ===== حاوية المسائل المحسنة ===== */
.problems-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 2.5rem;
    margin-bottom: 4rem;
    padding: 1.5rem 0;
}

.problem-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 2.2rem;
    box-shadow: var(--box-shadow);
    border: 2px solid #e9ecef;
    transition: var(--transition);
    position: relative;
    min-height: 320px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.problem-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transition: var(--transition);
}

.problem-card:hover {
    border-color: var(--accent-color);
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
}

.problem-card:hover::before {
    height: 8px;
}

.problem-number {
    position: absolute;
    top: -15px;
    right: -15px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.2rem;
    box-shadow: 0 5px 15px rgba(74, 111, 165, 0.3);
    z-index: 2;
}

/* ===== أيقونات حالة الإجابة المحسنة ===== */
.answer-status {
    position: absolute;
    left: 20px;
    top: 20px;
    font-size: 2rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: scale(0) rotate(180deg);
    transition: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    z-index: 1;
}

.answer-status.correct {
    background: linear-gradient(135deg, rgba(40, 167, 69, 0.15), rgba(40, 167, 69, 0.25));
    color: var(--success-color);
    opacity: 1;
    transform: scale(1) rotate(0deg);
    box-shadow: 0 4px 12px rgba(40, 167, 69, 0.2);
}

.answer-status.incorrect {
    background: linear-gradient(135deg, rgba(220, 53, 69, 0.15), rgba(220, 53, 69, 0.25));
    color: var(--danger-color);
    opacity: 1;
    transform: scale(1) rotate(0deg);
    box-shadow: 0 4px 12px rgba(220, 53, 69, 0.2);
}

/* ===== نص السؤال المحسن ===== */
.problem-question {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    color: var(--dark-color);
    text-align: center;
    padding: 0 1rem;
    min-height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1.7;
    font-weight: 700;
    flex-grow: 1;
}

/* ===== حاوية الإجابة المحسنة ===== */
.answer-container {
    margin: 1.5rem 0 2rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    border-radius: var(--border-radius);
    border: 2px solid #dee2e6;
    flex-grow: 1;
    display: flex;
    align-items: center;
    transition: var(--transition);
}

.problem-card:hover .answer-container {
    border-color: var(--accent-color);
    background: linear-gradient(135deg, #ffffff, #f8f9fa);
}

.answer-input {
    width: 100%;
    padding: 1.2rem;
    border: 2px solid #ced4da;
    border-radius: calc(var(--border-radius) - 4px);
    font-size: 1.3rem;
    text-align: center;
    font-family: 'Cairo', sans-serif;
    transition: var(--transition);
    font-weight: 700;
    color: var(--dark-color);
    background: white;
}

.answer-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 5px rgba(23, 162, 184, 0.2);
    transform: translateY(-2px);
}

.answer-input::placeholder {
    color: #adb5bd;
    font-weight: 500;
}

/* ===== زر التلميح المحسن ===== */
.show-hint-button {
    margin-top: auto;
    width: 100%;
    padding: 1rem;
    font-size: 1.1rem;
    border-radius: var(--border-radius);
    background: linear-gradient(135deg, #6c757d, #5a6268);
    color: white;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: 0 4px 12px rgba(108, 117, 125, 0.2);
}

.show-hint-button:hover {
    background: linear-gradient(135deg, #5a6268, #495056);
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(108, 117, 125, 0.3);
}

/* ===== زر التحقق العام المحسن ===== */
.check-all-container {
    text-align: center;
    margin: 3rem 0 4rem;
    padding: 2rem;
    background: linear-gradient(135deg, rgba(40, 167, 69, 0.05), rgba(40, 167, 69, 0.1));
    border-radius: var(--border-radius);
    border: 2px dashed rgba(40, 167, 69, 0.3);
}

.check-all-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    padding: 1.3rem 3.5rem;
    font-size: 1.4rem;
    min-width: 300px;
    border-radius: var(--border-radius);
    font-weight: 800;
    box-shadow: 0 6px 20px rgba(40, 167, 69, 0.3);
    position: relative;
    overflow: hidden;
}

.check-all-button::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transform: translateX(-100%);
}

.check-all-button:hover::before {
    animation: shine 1.5s ease-in-out;
}

@keyframes shine {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* ===== أزرار التنقل المحسنة ===== */
.navigation-buttons {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin: 4rem 0;
    padding: 3rem 0;
    border-top: 3px solid #f1f3f5;
    border-bottom: 3px solid #f1f3f5;
    background: linear-gradient(135deg, #f8fafc, #f1f3f5);
    border-radius: var(--border-radius);
}

.nav-button {
    min-width: 180px;
    padding: 1.2rem 2.5rem;
    font-size: 1.2rem;
    border-radius: var(--border-radius);
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    box-shadow: 0 4px 15px rgba(23, 162, 184, 0.2);
}

.page-numbers {
    display: flex;
    gap: 0.8rem;
    align-items: center;
    flex-wrap: wrap;
    justify-content: center;
}

.page-number {
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 2px solid #dee2e6;
    background: white;
    color: var(--dark-color);
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1.1rem;
}

.page-number:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    transform: translateY(-3px);
}

.page-number.active {
    background: linear-gradient(135deg, var(--accent-color), #138496);
    color: white;
    border-color: var(--accent-color);
    box-shadow: 0 4px 12px rgba(23, 162, 184, 0.3);
}

.page-dots {
    color: #6c757d;
    font-size: 1.2rem;
    padding: 0 0.5rem;
}

/* ===== شريط التقدم المحسن ===== */
.progress-container {
    background: white;
    border-radius: var(--border-radius);
    padding: 2.5rem;
    margin-bottom: 3rem;
    box-shadow: var(--box-shadow);
    border: 2px solid #e9ecef;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--secondary-color);
}

.progress-info i {
    color: var(--accent-color);
    font-size: 1.3rem;
}

.progress-bar {
    height: 28px;
    background-color: #e9ecef;
    border-radius: 14px;
    overflow: hidden;
    position: relative;
    box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.1);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 14px;
    transition: width 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
    overflow: hidden;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: progressShine 2s infinite;
}

@keyframes progressShine {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* ===== عناصر التحكم المحسنة ===== */
.controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    padding: 2rem;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border: 2px solid #e9ecef;
    flex-wrap: wrap;
    gap: 2rem;
}

.control-group {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--secondary-color);
}

.control-group label {
    display: flex;
    align-items: center;
    gap: 10px;
    white-space: nowrap;
}

.control-group select,
.control-group input[type="number"] {
    padding: 0.9rem 1.4rem;
    font-size: 1.1rem;
    border-radius: var(--border-radius);
    border: 2px solid #dee2e6;
    background: white;
    color: var(--dark-color);
    font-family: 'Cairo', sans-serif;
    font-weight: 600;
    min-width: 120px;
    transition: var(--transition);
}

.control-group select:focus,
.control-group input[type="number"]:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px rgba(23, 162, 184, 0.2);
}

/* ===== زر الخلط والطباعة المحسن ===== */
#shuffle-problems {
    background: linear-gradient(135deg, #6c757d, #5a6268);
    box-shadow: 0 4px 15px rgba(108, 117, 125, 0.3);
}

.print-button {
    padding: 1rem 2.2rem;
    font-size: 1.15rem;
    border-radius: var(--border-radius);
    background: linear-gradient(135deg, #495057, #343a40);
    color: white;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: 0 4px 15px rgba(52, 58, 64, 0.3);
}

.print-button:hover {
    background: linear-gradient(135deg, #343a40, #212529);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(52, 58, 64, 0.4);
}

/* ===== ملخص النتائج المحسن ===== */
.results-summary {
    background: white;
    border-radius: var(--border-radius);
    padding: 3rem;
    margin: 4rem 0;
    box-shadow: var(--box-shadow);
    border: 2px solid #e9ecef;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.results-summary::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

.results-summary h3 {
    color: var(--primary-color);
    margin-bottom: 2.5rem;
    font-size: 1.8rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.score-display {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2.5rem;
}

.score-item {
    text-align: center;
    padding: 2rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    border: 3px solid;
    background: white;
    position: relative;
    overflow: hidden;
}

.score-item:hover {
    transform: translateY(-5px);
}

.score-item.correct {
    border-color: var(--success-color);
    background: linear-gradient(135deg, rgba(40, 167, 69, 0.05), rgba(40, 167, 69, 0.1));
}

.score-item.incorrect {
    border-color: var(--danger-color);
    background: linear-gradient(135deg, rgba(220, 53, 69, 0.05), rgba(220, 53, 69, 0.1));
}

.score-item:last-child {
    border-color: var(--accent-color);
    background: linear-gradient(135deg, rgba(23, 162, 184, 0.05), rgba(23, 162, 184, 0.1));
}

.score-item h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--secondary-color);
    font-weight: 700;
}

.score-item .score-value {
    font-size: 3rem;
    font-weight: 900;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.score-item.correct .score-value {
    color: var(--success-color);
}

.score-item.incorrect .score-value {
    color: var(--danger-color);
}

.score-item:last-child .score-value {
    color: var(--accent-color);
}

.score-item p {
    color: #666;
    font-size: 1.05rem;
    margin: 0;
}

/* ===== تحسينات التجاوب للمستويات ===== */
@media (max-width: 1200px) {
    .problems-container {
        grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
        gap: 2rem;
    }
    
    .level-header h2 {
        font-size: 2.6rem;
    }
}

@media (max-width: 992px) {
    .level-header {
        padding: 3.5rem 0;
    }
    
    .level-header h2 {
        font-size: 2.3rem;
    }
    
    .level-header p {
        font-size: 1.2rem;
    }
    
    .problems-container {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
        gap: 1.8rem;
    }
    
    .problem-card {
        padding: 2rem;
        min-height: 300px;
    }
    
    .problem-question {
        font-size: 1.4rem;
    }
    
    .answer-input {
        font-size: 1.2rem;
        padding: 1.1rem;
    }
    
    .check-all-button {
        min-width: 250px;
        padding: 1.2rem 3rem;
        font-size: 1.3rem;
    }
    
    .navigation-buttons {
        flex-wrap: wrap;
        gap: 1.5rem;
        padding: 2.5rem 0;
    }
    
    .nav-button {
        min-width: 160px;
        padding: 1.1rem 2rem;
    }
}

@media (max-width: 768px) {
    .level-header {
        padding: 3rem 0;
        margin-bottom: 2.5rem;
        border-radius: 0 0 20px 20px;
    }
    
    .level-header h2 {
        font-size: 2rem;
        gap: 15px;
    }
    
    .level-header p {
        font-size: 1.1rem;
        padding: 0 1rem;
    }
    
    .problems-container {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 1rem;
    }
    
    .problem-card {
        padding: 1.8rem;
        min-height: 280px;
    }
    
    .problem-question {
        font-size: 1.3rem;
        min-height: 80px;
    }
    
    .controls {
        flex-direction: column;
        align-items: stretch;
        gap: 1.5rem;
        padding: 1.8rem;
    }
    
    .control-group {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .check-all-container {
        margin: 2.5rem 0;
        padding: 1.8rem;
    }
    
    .check-all-button {
        width: 100%;
        min-width: auto;
    }
    
    .navigation-buttons {
        flex-direction: column;
        gap: 1.5rem;
        padding: 2rem;
    }
    
    .page-numbers {
        order: -1;
        margin-bottom: 1rem;
    }
    
    .nav-button {
        width: 100%;
        min-width: auto;
    }
    
    .score-display {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .results-summary {
        padding: 2.5rem 1.5rem;
        margin: 3rem 0;
    }
}

@media (max-width: 576px) {
    .level-header h2 {
        font-size: 1.8rem;
    }
    
    .problem-card {
        padding: 1.5rem;
        min-height: 260px;
    }
    
    .problem-question {
        font-size: 1.2rem;
    }
    
    .answer-input {
        font-size: 1.1rem;
        padding: 1rem;
    }
    
    .answer-status {
        width: 45px;
        height: 45px;
        font-size: 1.8rem;
        left: 15px;
        top: 15px;
    }
    
    .problem-number {
        width: 45px;
        height: 45px;
        font-size: 1.1rem;
        top: -12px;
        right: -12px;
    }
    
    .check-all-button {
        padding: 1.1rem 2rem;
        font-size: 1.2rem;
    }
    
    .score-item {
        padding: 1.5rem;
    }
    
    .score-item .score-value {
        font-size: 2.5rem;
    }
}