.ip-controls {
    display: flex;
    gap: 15px;
    margin: 25px 0 10px 0;
    justify-content: center;
    flex-wrap: wrap;
}

.ip-input-group {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 5px;
}

.ip-input-group label {
    font-size: 0.85rem;
    font-weight: bold;
    text-transform: uppercase;
    color: var(--accent);
    letter-spacing: 1px;
}

.ip-controls input[type="text"], 
.ip-controls select {
    padding: 10px 15px;
    font-size: 1rem;
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    font-family: monospace;
    background-color: rgba(0, 0, 0, 0.2);
    color: white;
    outline: none;
    transition: border-color 0.2s;
}

.ip-controls input[type="text"]:focus, 
.ip-controls select:focus {
    border-color: var(--primary);
}

.ip-error-message {
    color: var(--primary);
    font-size: 0.95rem;
    font-weight: bold;
    min-height: 25px;
    margin-bottom: 15px;
    text-shadow: 1px 1px 0px #000;
}

.ip-output-box {
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    overflow: hidden;
    background: rgba(0, 0, 0, 0.15);
    margin-top: 20px;
}

.ip-bar {
    background: linear-gradient(90deg, var(--secondary), #131619);
    padding: 12px;
    text-align: center;
    font-weight: bold;
    font-family: monospace;
    font-size: 1.05rem;
    transition: color 0.2s;
}

.ip-bar-header {
    border-bottom: 2px solid var(--primary);
    color: var(--accent);
}

.ip-bar-footer {
    border-top: 2px solid var(--primary);
    color: #fff;
}

.ip-octets-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    background: rgba(0, 0, 0, 0.05);
}

.ip-octet-column {
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    padding: 20px 15px;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.ip-octet-column:last-child { border-right: none; }

.ip-octet-title {
    font-weight: bold;
    color: var(--accent);
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.ip-bit-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 15px;
    text-align: center;
}

.ip-bit-table th, 
.ip-bit-table td {
    border: 1px solid rgba(255, 255, 255, 0.15);
    padding: 8px 2px;
    width: 12.5%;
    font-size: 0.85rem;
}

.ip-bit-table th {
    background: rgba(255, 255, 255, 0.05);
    color: #ced4da;
}

.ip-bit-table td {
    color: white;
    font-weight: bold;
    font-family: monospace;
    cursor: pointer;
    user-select: none;
    background: rgba(255, 255, 255, 0.02);
    transition: background 0.1s, color 0.1s;
}

.ip-bit-table td:hover, .ip-bit-active td:hover {
    background: rgba(69, 255, 87, 0.15) !important;
    color: var(--accent) !important;
    border-color: rgba(69, 255, 87, 0.4) !important;
}

.ip-bit-active {
    background: rgba(255, 69, 87, 0.15) !important;
    color: var(--accent) !important;
    border-color: rgba(255, 69, 87, 0.4) !important;
}

.ip-explanation {
    font-size: 0.85rem;
    color: #ced4da;
    margin-bottom: 12px;
    min-height: 40px;
}

.ip-calculation {
    font-family: monospace;
    font-size: 1.3rem;
    font-weight: bold;
    background: rgba(0, 0, 0, 0.3);
    padding: 10px 12px;
    border-radius: 6px;
    border-left: 3px solid var(--primary);
    width: 100%;
    color: var(--accent);
    text-align: center;
}

@media (max-width: 900px) {
    .ip-octets-grid { grid-template-columns: 1fr; }
    .ip-octet-column {
        border-right: none !important;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    .ip-octet-column:last-child { border-bottom: none; }
}