body {
    font-family: 'Inter', sans-serif;
    background-color: #0d1117; /* GitHub dark-like background */
    color: #c9d1d9; 
}
.panel {
    background-color: #161b22;
    border: 1px solid #30363d;
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}
.panel:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}
.form-select, .form-textarea, .form-input {
    background-color: #0d1117;
    border-color: #30363d;
    color: #c9d1d9;
    border-radius: 0.5rem;
    transition: all 0.2s ease-in-out;
}
.form-select:focus, .form-textarea:focus, .form-input:focus {
    outline: none;
    border-color: #58a6ff;
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.3);
}
.btn {
    transition: all 0.2s ease-in-out;
    border-radius: 0.5rem;
    font-weight: 600;
    padding: 0.75rem 1.25rem;
}
.btn-primary {
    background-color: #238636;
    color: white;
    border: 1px solid rgba(240, 246, 252, 0.1);
}
.btn-primary:hover {
    background-color: #2ea043;
}
.btn-primary:disabled {
    background-color: #30363d;
    color: #8b949e;
    cursor: not-allowed;
}
.btn-secondary {
    background-color: #30363d;
    color: #c9d1d9;
    border: 1px solid #4b5563;
}
.btn-secondary:hover {
    background-color: #4b5563;
    border-color: #8b949e;
}
/* Custom toggle switch styles */
.toggle-bg { background-color: #30363d; }
.toggle-dot { transition: transform 0.3s ease-in-out; background-color: #8b949e; }
input:checked ~ .toggle-dot { transform: translateX(100%); background-color: #58a6ff; }

/* Custom scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #0d1117; }
::-webkit-scrollbar-thumb { background: #30363d; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #8b949e; }

/* Loading spinner */
.loader {
    border: 4px solid #30363d;
    border-top: 4px solid #58a6ff;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

/* Fade-in animation */
.fade-in-start {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.fade-in-end {
    opacity: 1;
    transform: translateY(0);
}
.history-item {
    background-color: #0d1117;
    padding: 0.75rem;
    border-radius: 0.5rem;
    border: 1px solid #30363d;
    cursor: pointer;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}
.history-item:hover {
    background-color: #30363d;
    border-color: #58a6ff;
}