* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Fira Code', 'Monaco', monospace;
    background: #0a0a0a;
    min-height: 100vh;
    color: #00ff41;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    background: rgba(10, 10, 10, 0.95);
    border: 1px solid #333;
    border-radius: 10px;
    width: 100%;
    max-width: 600px;
    box-shadow: 0 0 40px rgba(0, 255, 65, 0.1);
    padding: 30px;
}

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

.logo-icon {
    width: 60px;
    height: 60px;
    background: rgba(0, 255, 65, 0.1);
    border: 1px solid #00ff41;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    margin-bottom: 15px;
    color: #00ff41;
}

h1 {
    color: #00ff41;
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 5px;
}

.subtitle {
    color: #888;
    font-size: 0.9rem;
}

.form-group {
    margin-bottom: 15px;
}

.input-wrapper {
    position: relative;
}

.input-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: #666;
    font-size: 12px;
}

input[type="text"] {
    width: 100%;
    padding: 12px 12px 12px 70px;
    background: #1a1a1a;
    border: 1px solid #333;
    border-radius: 6px;
    color: #e0e0e0;
    font-family: inherit;
    font-size: 14px;
}

input[type="text"]:focus {
    outline: none;
    border-color: #00ff41;
    box-shadow: 0 0 10px rgba(0, 255, 65, 0.1);
}

input[type="text"]::placeholder {
    color: #555;
}

button {
    width: 100%;
    padding: 12px 20px;
    background: rgba(0, 255, 65, 0.1);
    border: 1px solid #00ff41;
    color: #00ff41;
    font-family: inherit;
    font-size: 14px;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.3s;
}

button:hover {
    background: #00ff41;
    color: #0a0a0a;
    box-shadow: 0 0 20px rgba(0, 255, 65, 0.4);
}

.result {
    margin-top: 25px;
    padding: 20px;
    border-radius: 6px;
    border: 1px solid #333;
}

.result.success {
    border-color: #00ff41;
    background: rgba(0, 255, 65, 0.05);
}

.result.error {
    border-color: #ff5f56;
    background: rgba(255, 95, 86, 0.05);
}

.status-badge {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 15px;
}

.status-badge.valid {
    background: rgba(0, 255, 65, 0.1);
    color: #00ff41;
    border: 1px solid #00ff41;
}

.status-badge.invalid {
    background: rgba(255, 95, 86, 0.1);
    color: #ff5f56;
    border: 1px solid #ff5f56;
}

.days-card {
    background: #1a1a1a;
    border: 1px solid #333;
    border-radius: 6px;
    padding: 20px;
    text-align: center;
    margin-bottom: 15px;
}

.days-number {
    font-size: 2.5rem;
    font-weight: 600;
    line-height: 1;
    margin-bottom: 5px;
}

.days-number.good { color: #00ff41; }
.days-number.warning { color: #ffbd2e; }
.days-number.danger { color: #ff5f56; }

.days-label {
    color: #666;
    font-size: 12px;
    text-transform: uppercase;
}

.info-grid {
    display: grid;
    gap: 10px;
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 15px;
    background: #1a1a1a;
    border: 1px solid #333;
    border-radius: 6px;
}

.info-label {
    color: #888;
    font-size: 13px;
}

.info-value {
    color: #e0e0e0;
    font-weight: 500;
    font-size: 13px;
}

.footer {
    margin-top: 25px;
    text-align: center;
    color: #666;
    font-size: 13px;
}

.footer a {
    color: #00ff41;
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

@media (max-width: 640px) {
    .container {
        padding: 20px;
    }
    
    h1 {
        font-size: 1.5rem;
    }
    
    .days-number {
        font-size: 2rem;
    }
}