:root {
    --butter-primary: #F3C75F;
    --butter-secondary: #FFF8E7;
    --butter-accent: #E6A23C;
    --butter-dark: #8B7355;
    --cream: #FFFAF0;
    --text-dark: #2C1810;
}

body {
    background-color: var(--butter-secondary);
    color: var(--text-dark);
    font-family: 'Crimson Pro', serif;
    line-height: 1.8;
    background-image: 
        linear-gradient(45deg, var(--butter-secondary) 25%, transparent 25%),
        linear-gradient(-45deg, var(--butter-secondary) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, var(--butter-secondary) 75%),
        linear-gradient(-45deg, transparent 75%, var(--butter-secondary) 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

.container {
    max-width: 800px;
    padding: 2rem;
}

.butter-card {
    background: var(--cream);
    border-radius: 12px;
    box-shadow: 0 8px 16px rgba(139, 115, 85, 0.1);
    padding: 2.5rem;
    margin: 2.5rem 0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(230, 162, 60, 0.1);
}

.butter-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 20px rgba(139, 115, 85, 0.15);
}

.btn-butter {
    background: linear-gradient(145deg, var(--butter-primary), #FFE07D);
    border: 2px solid var(--butter-accent);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    color: var(--text-dark);
    font-weight: 500;
    font-family: 'Crimson Pro', serif;
    font-size: 1rem;
    letter-spacing: 0.5px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    display: inline-block;
    text-align: center;
    min-width: 120px;
    margin: 0 auto;
}

.btn-generate {
    margin-top: 1rem;
    min-width: 120px;
    position: relative;
}

.loading-spinner {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    display: none; /* Initially hidden */
}

.spinner {
    width: 20px;
    height: 20px;
    border: 3px solid var(--butter-primary);
    border-top: 3px solid var(--butter-accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.button-text {
    transition: opacity 0.2s;
}

.btn-generate.loading .button-text {
    opacity: 0;
}

.btn-generate.loading .loading-spinner {
    display: flex;
}

.btn-generate:hover {
    transform: translateY(-2px) perspective(1px) translateZ(0);
    background: linear-gradient(145deg, var(--butter-primary), #FFE7A3);
    box-shadow: 
        inset 0 -2px 4px rgba(255, 255, 255, 0.3),
        inset 0 2px 4px rgba(255, 255, 255, 0.5),
        0 6px 12px rgba(230, 162, 60, 0.2);
}

.btn-generate:active {
    transform: translateY(1px);
    box-shadow: 
        inset 0 -1px 2px rgba(255, 255, 255, 0.2),
        inset 0 1px 2px rgba(255, 255, 255, 0.3),
        0 2px 4px rgba(230, 162, 60, 0.1);
}

.btn-butter:hover {
    background: linear-gradient(145deg, #FFE07D, var(--butter-primary));
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(230, 162, 60, 0.2);
}

.form-control,
.form-select {
    border: 2px solid var(--butter-primary);
    border-radius: 8px;
    padding: 0.5rem 0.75rem;
    height: 42px;
}

/* GPT Toggle and Tuning Parameters Styles */
.form-check-input {
    background-color: var(--butter-secondary);
    border-color: var(--butter-accent);
    width: 3rem;
    height: 1.5rem;
    margin-right: 1rem;
}

.form-check-input:checked {
    background-color: var(--butter-primary);
    border-color: var(--butter-accent);
}

.form-check-label {
    color: var(--butter-dark);
    font-weight: 500;
    font-size: 1.1rem;
}

#tuningParams {
    background-color: var(--cream);
    border: 2px solid var(--butter-primary);
    border-radius: 12px;
    padding: 1.5rem;
    margin-top: 1rem;
    box-shadow: 0 4px 8px rgba(139, 115, 85, 0.1);
}

#tuningParams h5 {
    color: var(--butter-dark);
    font-weight: 600;
    margin-bottom: 1rem;
}

.tuning-grid {
    display: grid;
    gap: 0.75rem;
}

.tuning-row {
    display: grid;
    grid-template-columns: minmax(100px, 1fr) 2fr;
    align-items: center;
    gap: 1rem;
}

.form-range {
    height: 8px;
    border-radius: 4px;
    background-color: var(--butter-secondary);
    margin: 0;
}

.form-range::-webkit-slider-thumb {
    background: var(--butter-primary);
    border: 2px solid var(--butter-accent);
    width: 20px;
    height: 20px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s ease;
}

.form-range::-webkit-slider-thumb:hover {
    background: var(--butter-accent);
    transform: scale(1.1);
}

.form-range::-webkit-slider-runnable-track {
    background: linear-gradient(90deg, var(--butter-primary), var(--butter-accent));
    border-radius: 4px;
    height: 8px;
}

.form-label {
    color: var(--butter-dark);
    font-weight: 500;
    margin-bottom: 0.5rem;
}
.form-control:focus {
    border-color: var(--butter-accent);
    box-shadow: 0 0 0 0.2rem rgba(255, 213, 79, 0.25);
}

#output {
    background-color: white;
    border: 2px solid var(--butter-primary);
    border-radius: 8px;
    padding: 1.5rem;
    min-height: 200px;
    margin-top: 1rem;
    line-height: 1.8;
    white-space: pre-line;
}

#output br {
    display: block;
    margin: 1em 0;
    content: "";
}

.header {
    text-align: center;
    margin-bottom: 3.5rem;
    padding: 2rem 0;
}

.header h1 {
    color: var(--butter-dark);
    font-weight: 600;
    font-size: 3.5rem;
    margin-bottom: 1rem;
    letter-spacing: -0.5px;
}

.header .lead {
    color: var(--butter-accent);
    font-size: 1.4rem;
    font-style: italic;
    margin-bottom: 1.5rem;
}

.butter-ornament {
    color: var(--butter-accent);
    font-size: 1.5rem;
    letter-spacing: 1rem;
    opacity: 0.8;
}

.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: var(--cream);
    color: var(--text-dark);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    border: 2px solid var(--butter-accent);
    box-shadow: 0 4px 12px rgba(139, 115, 85, 0.1);
    display: none;
    font-family: 'Crimson Pro', serif;
    font-style: italic;
}

.butter-footer {
    background: var(--cream);
    border-top: 2px solid var(--butter-primary);
    padding: 2rem 0;
    margin-top: 4rem;
    text-align: center;
}

.butter-footer a {
    color: var(--butter-accent);
    text-decoration: none;
    font-weight: 500;
}

.butter-footer a:hover {
    text-decoration: underline;
}

.butter-footer .copyright {
    color: var(--butter-dark);
    font-style: italic;
    margin-top: 1rem;
}

.api-endpoint, .api-example {
    background: var(--butter-secondary);
    border: 2px solid var(--butter-primary);
    border-radius: 8px;
    padding: 1rem;
    margin: 1rem 0;
}

.table {
    margin: 1.5rem 0;
}

.table th {
    color: var(--butter-dark);
    border-bottom-color: var(--butter-primary);
}

.table td {
    border-bottom-color: var(--butter-primary);
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .butter-card {
        padding: 1rem;
    }

    .tuning-grid {
        gap: 0.5rem;
    }

    .tuning-row {
        grid-template-columns: minmax(80px, 1fr) 1.5fr;
        gap: 0.5rem;
    }

    .form-label {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .tuning-row {
        grid-template-columns: minmax(70px, 1fr) 1.2fr;
    }
}