/* VLSM Calculator Styles */

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', sans-serif;
    background: #000000;
    min-height: 100vh;
    padding: 20px;
    color: #ffffff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: #1c1c1e;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    overflow: hidden;
}

header {
    background: #1c1c1e;
    color: #ffffff;
    padding: 40px;
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
}

header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

.input-section {
    padding: 40px;
    background: #2c2c2e;
}

.network-input, .hosts-input {
    margin-bottom: 25px;
}

label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: #ffffff;
    font-size: 1.1rem;
}

input[type="text"] {
    width: 100%;
    padding: 15px;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    background: #3a3a3c;
    color: #ffffff;
    transition: background-color 0.3s ease;
}

input[type="text"]:focus {
    outline: none;
    background: #48484a;
}

input[type="text"]::placeholder {
    color: #8e8e93;
}

small {
    display: block;
    margin-top: 5px;
    color: #8e8e93;
    font-size: 0.9rem;
}

button {
    background: #e6800e;
    color: #ffffff;
    border: none;
    padding: 15px 40px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 12px;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
}

button:hover {
    background: #ff9500;
    transform: scale(1.02);
}

button:active {
    transform: scale(0.98);
}


.results-section {
    padding: 40px;
    background: #1c1c1e;
}

.results-section h2 {
    color: #ffffff;
    margin-bottom: 30px;
    font-size: 2rem;
    font-weight: 300;
    text-align: center;
}

.results-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: 20px;
}

.subnet-card {
    background: #3a3a3c;
    border: 1px solid #48484a;
    border-radius: 12px;
    padding: 10px;
}

.subnet-card h3 {
    color: #ffffff;
    margin-bottom: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    border-bottom: 2px solid #e6800e;
    padding-bottom: 4px;
}

.subnet-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.info-row {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 2px 0;
    border-bottom: 1px solid #3a3a3c;
    gap: 2px;
}

.info-row:last-child {
    border-bottom: none;
}

.ospf-section {
    border-top: 1px solid #e6800e;
    margin-top: 4px;
    padding-top: 6px;
}

.cli-config {
    margin-top: 8px;
    padding: 8px;
    background: #1a1a1a;
    border-radius: 6px;
    border: 1px solid #e6800e;
}

.cli-header {
    font-size: 0.8rem;
    color: #e6800e;
    font-weight: 600;
    margin-bottom: 4px;
}

.cli-code {
    background: #000000;
    padding: 6px;
    border-radius: 4px;
    margin-bottom: 6px;
}

.cli-code code {
    font-family: 'SF Mono', 'Monaco', 'Courier New', monospace;
    font-size: 0.75rem;
    color: #00ff00;
    line-height: 1.4;
}

.copy-btn {
    background: #e6800e;
    color: #ffffff;
    border: none;
    padding: 4px 8px;
    font-size: 0.7rem;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.copy-btn:hover {
    background: #ff9500;
    transform: none;
}

.label {
    font-weight: 600;
    color: #8e8e93;
    flex: 1;
    font-size: 0.85rem;
}

.value {
    font-family: 'SF Mono', 'Monaco', 'Courier New', monospace;
    font-weight: 500;
    color: #ffffff;
    text-align: left;
    font-size: 0.85rem;
}

.value.highlight {
    background: linear-gradient(135deg, #e6800e, #ff9500);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.error-message {
    background: #d70015;
    color: #ffffff;
    padding: 15px;
    margin: 20px 40px;
    border-radius: 12px;
    font-weight: 500;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    header {
        padding: 30px 20px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .input-section, .results-section {
        padding: 30px 20px;
    }
    
    .results-grid {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }
    
    .subnet-card {
        padding: 8px;
    }
    
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.8rem;
    }
    
    .results-grid {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }
    
    .subnet-card {
        min-width: unset;
        padding: 6px;
    }
}