:root {
    --primary-color: #4361ee;
    --secondary-color: #3f37c9;
    --accent-color: #4cc9f0;
    --cloudflare-color: #F48120; /* Cloudflare Orange */
    --gpt6-color: #6a5acd;
    --onnx-color: #00b4d8;
    --success-color: #4caf50;
    --danger-color: #f44336;
}

body {
    font-family: 'Segoe UI', sans-serif;
    background-color: #f5f7ff;
    color: #212529;
}

.navbar {
    background-color: var(--primary-color);
}

.hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 3rem 0;
    border-radius: 0 0 20px 20px;
}

.card {
    border: none;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0,0,0,.1);
    margin-bottom: 1.5rem;
}

.card-header {
    background-color: var(--primary-color);
    color: white;
    border-radius: 15px 15px 0 0 !important;
}

.model-status {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 5px;
    font-size: 0.875rem;
    font-weight: 600;
}

.model-available {
    background-color: rgba(76, 175, 80, 0.2);
    color: var(--success-color);
}

.model-unavailable {
    background-color: rgba(244, 67, 54, 0.2);
    color: var(--danger-color);
}

.cloudflare-status {
    background-color: rgba(244, 129, 32, 0.2);
    color: var(--cloudflare-color);
}

.response-container {
    background-color: white;
    border-radius: 15px;
    padding: 1.5rem;
    margin-top: 1.5rem;
    box-shadow: 0 4px 6px rgba(0,0,0,.1);
}

.stats-card {
    background-color: white;
    border-radius: 15px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 6px rgba(0,0,0,.1);
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
}

.form-select:focus, .form-control:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 0.25rem rgba(76, 201, 240, 0.25);
}

.loading {
    opacity: 0.7;
    pointer-events: none;
}

.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}