:root {
    --primary: #1e3a5f;
    --primary-light: #f5f7fa;
    --accent: #c17835;
    --text-primary: #2c2c2c;
    --text-secondary: #5a5a5a;
    --cream: #fdfbf7;
    --off-white: #f9f7f4;
    --border: #d4cfc7;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.12);
    --success: #4a7c59;
    --warning: #c17835;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Source Sans 3', sans-serif;
    background-color: var(--cream);
    background-image:
        linear-gradient(var(--border) 1px, transparent 1px),
        linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 20px 20px;
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    padding: 2rem 1rem;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: var(--off-white);
    padding: 3rem;
    border: 2px solid var(--border);
    box-shadow: var(--shadow-md);
}

.header {
    text-align: center;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--border);
}

h1 {
    font-family: 'Crimson Pro', serif;
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 300;
}

h3 {
    font-family: 'Crimson Pro', serif;
    font-size: 1.5rem;
    color: var(--primary);
    margin-bottom: 1rem;
    font-weight: 600;
}

h4 {
    font-family: 'Crimson Pro', serif;
    font-size: 1.2rem;
    color: var(--primary);
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.main-content {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.controls-section {
    background: white;
    padding: 2rem;
    border: 2px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.control-group:last-child {
    margin-bottom: 0;
}

label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.model-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.model-card {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem;
    background: var(--off-white);
    border: 2px solid var(--border);
    cursor: pointer;
    transition: all 0.2s ease;
}

.model-card:hover {
    border-color: var(--primary);
    transform: translateX(-2px);
    box-shadow: 4px 4px 0 rgba(30, 58, 95, 0.1);
}

.model-card input[type="radio"] {
    margin-top: 0.25rem;
    cursor: pointer;
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}

.model-card input[type="radio"]:checked + .model-info {
    color: var(--primary);
}

.model-card:has(input[type="radio"]:checked) {
    border-color: var(--primary);
    background: var(--primary-light);
    box-shadow: 4px 4px 0 rgba(30, 58, 95, 0.2);
}

.model-info {
    flex: 1;
}

.model-name {
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
    color: var(--primary);
}

.model-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.model-stats {
    display: flex;
    gap: 1.5rem;
    font-size: 0.85rem;
}

.stat {
    color: var(--text-secondary);
}

.stat strong {
    color: var(--accent);
    font-weight: 600;
}

.badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 3px;
    margin-left: 0.5rem;
}

.badge.available {
    background: var(--success);
    color: white;
}

.badge.unavailable {
    background: var(--text-secondary);
    color: white;
}

.badge.checking {
    background: var(--accent);
    color: white;
}

.model-card.disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.model-card.disabled input[type="radio"] {
    cursor: not-allowed;
}

.chrome-ai-setup {
    margin-top: 0.75rem;
    padding: 0.75rem;
    background: var(--cream);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 0.85rem;
}

.chrome-ai-setup strong {
    color: var(--primary);
}

.chrome-ai-setup a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s ease;
}

.chrome-ai-setup a:hover {
    border-bottom-color: var(--accent);
}

code {
    background: var(--cream);
    padding: 0.15rem 0.4rem;
    border: 1px solid var(--border);
    border-radius: 3px;
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.9em;
}

.prompt-input {
    padding: 0.75rem;
    border: 2px solid var(--border);
    background: var(--off-white);
    font-family: 'Source Sans 3', sans-serif;
    font-size: 1rem;
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.prompt-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.1);
}

.prompt-input {
    resize: vertical;
    min-height: 100px;
}

.btn {
    padding: 0.875rem 2rem;
    border: 2px solid var(--primary);
    background: var(--primary);
    color: white;
    font-family: 'Source Sans 3', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 4px 4px 0 rgba(30, 58, 95, 0.2);
}

.btn:hover:not(:disabled) {
    transform: translateX(-2px) translateY(-2px);
    box-shadow: 6px 6px 0 rgba(30, 58, 95, 0.3);
}

.btn:active:not(:disabled) {
    transform: translateX(1px) translateY(1px);
    box-shadow: 2px 2px 0 rgba(30, 58, 95, 0.2);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    width: 100%;
    margin-top: 0.5rem;
}

.loading-status {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background: var(--primary-light);
    border: 2px solid var(--primary);
}

.loading-bar-container {
    width: 100%;
    height: 24px;
    background: white;
    border: 2px solid var(--border);
    margin-bottom: 1rem;
    overflow: hidden;
}

.loading-bar {
    height: 100%;
    background: var(--accent);
    width: 0%;
    transition: width 0.3s ease;
}

.loading-text {
    text-align: center;
    color: var(--primary);
    font-weight: 600;
}

.hidden {
    display: none !important;
}

.generation-section {
    background: white;
    padding: 2rem;
    border: 2px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.model-loaded-info {
    margin-bottom: 1.5rem;
    padding: 0.75rem 1rem;
    background: var(--success);
    color: white;
    border-radius: 4px;
    font-size: 0.9rem;
}

.model-loaded-info strong {
    font-weight: 600;
}

.parameters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

input[type="range"] {
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: var(--border);
    outline: none;
    -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: var(--shadow-sm);
}

input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: var(--shadow-sm);
}

.generation-status {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--primary-light);
    border: 2px solid var(--primary);
    text-align: center;
    color: var(--primary);
    font-weight: 600;
}

.output-section {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border);
}

.output-text {
    background: var(--cream);
    padding: 1.5rem;
    border: 2px solid var(--border);
    font-family: 'Source Sans 3', sans-serif;
    font-size: 1rem;
    line-height: 1.8;
    white-space: pre-wrap;
    word-wrap: break-word;
    min-height: 100px;
}

.metrics-display {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    background: var(--primary-light);
    border: 2px solid var(--primary);
    border-radius: 4px;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.metrics-display strong {
    color: var(--primary);
    margin-right: 0.5rem;
}

.info-section {
    background: var(--primary-light);
    padding: 2rem;
    border: 2px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.info-section p {
    margin-bottom: 1rem;
}

.info-section a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    border-bottom: 2px solid transparent;
    transition: border-color 0.2s ease;
}

.info-section a:hover {
    border-bottom-color: var(--accent);
}

.info-section ul,
.info-section ol {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.info-section li {
    margin-bottom: 0.5rem;
}

.info-section ol {
    counter-reset: item;
}

.info-section ol li {
    margin-bottom: 0.75rem;
}

.info-section p {
    line-height: 1.6;
}

.info-section strong {
    color: var(--primary);
}

/* Custom Model Section */
.custom-model-section {
    padding: 1rem;
    background: var(--cream);
    border: 2px dashed var(--border);
    margin-top: 0.75rem;
}

.custom-model-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 0.75rem;
}

.custom-model-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    font-size: 1.2rem;
    font-weight: bold;
}

.custom-model-input-group {
    display: flex;
    gap: 0.5rem;
}

.custom-model-input {
    flex: 1;
    padding: 0.625rem 0.75rem;
    border: 2px solid var(--border);
    background: white;
    font-family: 'Source Sans 3', sans-serif;
    font-size: 0.95rem;
    transition: all 0.2s ease;
}

.custom-model-input:focus {
    outline: none;
    border-color: var(--primary);
}

.custom-model-input.valid {
    border-color: var(--success);
}

.custom-model-input.invalid {
    border-color: #c0392b;
}

.btn-validate {
    padding: 0.625rem 1rem;
    border: 2px solid var(--primary);
    background: white;
    color: var(--primary);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.btn-validate:hover:not(:disabled) {
    background: var(--primary);
    color: white;
}

.btn-validate:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Feedback Messages */
.custom-model-feedback {
    margin-top: 0.5rem;
    padding: 0.5rem 0.75rem;
    font-size: 0.9rem;
    border-radius: 4px;
}

.custom-model-feedback.error {
    background: #fde8e8;
    color: #c0392b;
    border: 1px solid #f5c6c6;
}

.custom-model-feedback.success {
    background: #e8f5e9;
    color: var(--success);
    border: 1px solid #c8e6c9;
}

.custom-model-feedback.warning {
    background: #fff8e1;
    color: #f57c00;
    border: 1px solid #ffe082;
}

.custom-model-feedback.loading {
    background: var(--primary-light);
    color: var(--primary);
    border: 1px solid var(--border);
}

/* Custom Model Cards */
#custom-model-cards {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 0.75rem;
}

.custom-model-card {
    position: relative;
}

.custom-model-card .badge.custom {
    background: var(--accent);
    color: white;
}

.remove-custom-model {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    width: 24px;
    height: 24px;
    border: none;
    background: var(--text-secondary);
    color: white;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.custom-model-card:hover .remove-custom-model {
    opacity: 1;
}

.remove-custom-model:hover {
    background: #c0392b;
}

@media (max-width: 768px) {
    body {
        padding: 1rem 0.5rem;
    }

    .container {
        padding: 2rem 1.5rem;
    }

    h1 {
        font-size: 2.5rem;
    }

    .parameters-grid {
        grid-template-columns: 1fr;
    }

    .model-stats {
        flex-direction: column;
        gap: 0.25rem;
    }
}

@media (max-width: 640px) {
    h1 {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .container {
        padding: 1.5rem 1rem;
    }

    .controls-section,
    .generation-section,
    .info-section {
        padding: 1.5rem;
    }

    .custom-model-input-group {
        flex-direction: column;
    }

    .btn-validate {
        width: 100%;
    }
}