body {
    background-color: #000000;
    color: #00FF00;
    font-family: 'Courier New', Courier, monospace;
    margin: 0;
    padding: 20px;
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    border: 1px solid #004400;
    padding: 20px;
    box-shadow: 0 0 20px rgba(0, 255, 0, 0.1);
}

header {
    text-align: center;
    border-bottom: 2px solid #00FF00;
    padding-bottom: 10px;
    margin-bottom: 20px;
}

h1 {
    font-size: 24px;
    text-shadow: 0 0 5px #00FF00;
    margin: 0;
}

p {
    font-size: 14px;
    color: #00AA00;
}

.ad-slot {
    background-color: #0a0a0a;
    border: 1px dashed #00FF00;
    height: 100px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 20px 0;
    color: #005500;
    font-size: 0.8em;
}

.tool-panel {
    background: #050505;
    padding: 20px;
    border: 1px solid #00DD00;
    border-radius: 5px;
}

.input-group {
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
}

.input-row {
    display: flex;
    gap: 10px;
}

label {
    margin-bottom: 5px;
    font-weight: bold;
    color: #00DD00;
}

select,
input {
    background-color: #000;
    border: 1px solid #00FF00;
    color: #00FF00;
    padding: 10px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 16px;
    outline: none;
    transition: all 0.3s ease;
    flex-grow: 1;
}

.unit-select {
    flex-grow: 0;
    width: 140px;
}

select:focus,
input:focus {
    box-shadow: 0 0 10px #00FF00;
    background-color: #050505;
}

.result-display {
    margin-top: 30px;
    text-align: center;
    border: 2px solid #00FF00;
    padding: 20px;
    position: relative;
    background: rgba(0, 255, 0, 0.05);
}

.result-display h3 {
    margin: 0;
    font-size: 14px;
    position: absolute;
    top: -10px;
    background: #000;
    padding: 0 10px;
    left: 20px;
}

#cost-display {
    font-size: 32px;
    font-weight: bold;
    text-shadow: 0 0 10px #00FF00;
}

.system-log {
    margin-top: 20px;
    border-top: 1px dotted #008800;
    padding-top: 10px;
    font-size: 12px;
    color: #008800;
    max-height: 100px;
    overflow-y: auto;
}

/* Scrollbar styles for pure hacker feel */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #000;
}

::-webkit-scrollbar-thumb {
    background: #004400;
}

::-webkit-scrollbar-thumb:hover {
    background: #00FF00;
}