:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --success-color: #10b981;
    --success-bg: #d1fae5;
    --danger-color: #ef4444;
    --danger-bg: #fee2e2;
    --text-color: #1f2937;
    --bg-color: #f3f4f6;
    --card-bg: rgba(255, 255, 255, 0.85);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Cairo', sans-serif;
}

body {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-color);
    padding: 20px;
}

.container {
    background: var(--card-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-radius: 20px;
    padding: 40px;
    width: 100%;
    max-width: 600px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.6);
}

header h1 {
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 2.5rem;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.05);
}

header p {
    color: #4b5563;
    margin-bottom: 30px;
    font-size: 1.1rem;
    font-weight: 600;
}

.search-box {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
}

.search-box input {
    flex: 1;
    padding: 15px 20px;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    outline: none;
    background: rgba(255, 255, 255, 0.9);
}

.search-box input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
    background: #fff;
}

.search-box button {
    padding: 15px 30px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(99, 102, 241, 0.2);
}

.search-box button:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(99, 102, 241, 0.3);
}

.result-card {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
    margin-bottom: 20px;
    animation: bounceIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 2px solid transparent;
}

.result-card.success {
    border-color: var(--success-color);
    background: linear-gradient(to bottom, #ffffff, #f0fdf4);
}

.result-card.fail {
    border-color: var(--danger-color);
    background: linear-gradient(to bottom, #ffffff, #fef2f2);
}

.student-name {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 25px;
    color: var(--text-color);
}

.stats {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 15px;
}

.stat-item {
    background: rgba(255, 255, 255, 0.8);
    padding: 15px;
    border-radius: 12px;
    flex: 1;
    min-width: 120px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.02);
    border: 1px solid #f3f4f6;
}

.stat-label {
    display: block;
    font-size: 1rem;
    color: #6b7280;
    margin-bottom: 8px;
    font-weight: 600;
}

.stat-value {
    display: block;
    font-size: 1.6rem;
    font-weight: 800;
}

.grade-pass { color: var(--success-color); }
.grade-fail { color: var(--danger-color); }

.hidden {
    display: none !important;
}

.error-msg {
    color: var(--danger-color);
    background: var(--danger-bg);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid #fecaca;
    font-size: 1.1rem;
    font-weight: 600;
    animation: shake 0.5s ease-in-out;
}

footer {
    margin-top: 40px;
    padding-top: 25px;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

footer p {
    color: #4b5563;
    font-size: 1.2rem;
    font-weight: 600;
}

footer .teacher-name {
    font-weight: 800;
    font-size: 1.3rem;
    background: linear-gradient(to left, #6366f1, #d946ef);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
    padding: 0 5px;
}

@keyframes bounceIn {
    0% { opacity: 0; transform: scale(0.9); }
    70% { transform: scale(1.02); }
    100% { opacity: 1; transform: scale(1); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-5px); }
    40%, 80% { transform: translateX(5px); }
}

@media (max-width: 500px) {
    .search-box {
        flex-direction: column;
    }
    .search-box button {
        width: 100%;
    }
}