* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro", "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

body {
    background: linear-gradient(135deg, #888888 0%, #111111 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    background: rgba(255, 255, 255, 0.7);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 600px;
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
}

h1 {
    color: #333;
    text-align: center;
    margin-bottom: 2rem;
    font-size: 2rem;
    font-weight: 600;
}

.calculator {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

label {
    color: #555;
    font-weight: 500;
}

input {
    padding: 0.8rem;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

input:focus {
    outline: none;
    border-color: #667eea;
}

button {
    background: #111;
    color: #fff;
    border: none;
    padding: 1rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background: #333;
}

.results {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 2px solid #eee;
}

.result-item {
    margin-bottom: 1rem;
}

.result-item h3 {
    color: #555;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.result-item p {
    color: #333;
    font-size: 1.2rem;
    font-weight: 600;
}

.attendance-card {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 2px 8px rgba(44, 62, 80, 0.07);
    padding: 2rem 1rem 1.5rem 1rem;
    margin-bottom: 1.5rem;
    text-align: center;
    max-width: 350px;
    margin-left: auto;
    margin-right: auto;
}

.attendance-label {
    color: #374658;
    font-size: 1.3rem;
    margin-bottom: 0.7rem;
    font-weight: 500;
}

#currentAttendance {
    font-size: 3rem;
    font-weight: 800;
    color: #000000;
    margin: 0;
    transition: color 0.3s ease;
}

.attendance-good {
    color: #2ecc71 !important;
}

.attendance-bad {
    color: #e74c3c !important;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 2px solid #eee;
}

.social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #f5f5f5;
    color: #333;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.social-btn i {
    font-size: 1.2rem;
}

.social-btn:hover {
    background: #667eea;
    color: white;
}

.developed-by-section {
    text-align: center;
    margin-top: 2rem;
    margin-bottom: 0.5rem;
}

.developed-by-label {
    font-size: 0.95rem;
    color: #888;
    letter-spacing: 1px;
    font-weight: 500;
    margin-bottom: 0.1rem;
}

.developer-name {
    font-size: 1.15rem;
    color: #222;
    font-weight: 600;
    margin-bottom: 0.3rem;
}

@media (max-width: 480px) {
    .container {
        padding: 1.5rem;
    }
    
    h1 {
        font-size: 1.5rem;
    }

    .social-links {
        gap: 0.8rem;
    }

    .social-btn {
        width: 35px;
        height: 35px;
    }

    #currentAttendance {
        font-size: 1.5rem;
    }

    .attendance-card {
        padding: 1.2rem 0.5rem 1rem 0.5rem;
        max-width: 100%;
        min-width: 0;
    }
    .attendance-label {
        font-size: 1rem;
    }
    .result-item h3 {
        font-size: 1rem;
    }
    .result-item p {
        font-size: 1rem;
    }
}