body {
    font-family: 'Segoe UI', system-ui, sans-serif;
    background-color: #1e1e1e;
    color: #d4d4d4;
    margin: 0;
    padding: 20px;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
}
header {
    text-align: center;
    margin-bottom: 20px;
}
h1 { color: #519aba; margin-bottom: 5px; }
header p { color: #858585; margin: 0; }

.workspace {
    display: flex;
    gap: 20px;
}
.panel {
    flex: 1;
    display: flex;
    flex-direction: column;
}
label {
    font-weight: bold;
    margin-bottom: 8px;
    color: #9cdcfe;
}
textarea {
    width: 100%;
    height: 450px;
    background-color: #252526;
    color: #ce9178;
    border: 1px solid #3c3c3c;
    padding: 15px;
    box-sizing: border-box;
    font-family: 'Courier New', Courier, monospace;
    font-size: 14px;
    resize: none;
    border-radius: 4px;
}
#tsOutput { color: #4ec9b0; background-color: #1a1a1a; }

.actions { margin-top: 15px; }
button {
    background-color: #0e639c;
    color: white;
    border: none;
    padding: 12px 24px;
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
    border-radius: 4px;
    transition: background 0.2s;
}
button:hover { background-color: #1177bb; }
.btn-success { background-color: #388a34; }
.btn-success:hover { background-color: #43a047; }