/* --- General Layout & Dark Theme --- */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: #0b0d11;
    color: #e6edf3;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.container {
    background: #1c2128;
    border-radius: 12px;
    border: 1px solid #30363d;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    width: 100%;
    max-width: 800px;
    overflow: hidden;
}

header {
    text-align: center;
    padding: 30px;
    border-bottom: 1px solid #30363d;
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
    font-weight: 700;
    color: #e6edf3;
}

header p {
    margin-top: 8px;
    color: #8b949e;
    font-size: 1.1rem;
}

/* --- Model Selector Navigation --- */
.model-selector {
    display: flex;
    justify-content: center;
    padding: 20px;
    background-color: #161b22;
    border-bottom: 1px solid #30363d;
}

.model-btn {
    background-color: transparent;
    border: none;
    padding: 12px 24px;
    margin: 0 10px;
    font-size: 1rem;
    font-weight: 600;
    color: #8b949e;
    cursor: pointer;
    border-radius: 8px;
    transition: background-color 0.2s, color 0.2s;
}

.model-btn.active {
    background-color: #ffd866;
    color: #000000;
}

.model-btn:not(.active):hover {
    background-color: #30363d;
    color: #e6edf3;
}

/* --- Main Content & Model Sections --- */
main {
    padding: 30px;
}

.model-section {
    display: none;
    animation: fadeIn 0.5s;
}

.model-section.active {
    display: block;
}

.model-section h2 {
    margin-top: 0;
    font-size: 1.8rem;
    color: #e6edf3;
    border-bottom: 2px solid #ffd866;
    padding-bottom: 10px;
    margin-bottom: 20px;
}

.model-section p {
    margin-bottom: 20px;
    line-height: 1.6;
    color: #8b949e;
}

/* --- Forms --- */
form {
    display: flex;
    flex-direction: column;
}

textarea, input[type="file"], input[type="number"] {
    width: 100%;
    padding: 12px;
    background-color: #0d1117;
    color: #e6edf3;
    border: 1px solid #30363d;
    border-radius: 8px;
    font-size: 1rem;
    margin-bottom: 15px;
    box-sizing: border-box;
}

button[type="submit"] {
    background-color: #ffd866;
    color: #000000;
    border: none;
    padding: 14px 20px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s;
    align-self: flex-start;
}

button[type="submit"]:hover {
    background-color: #f0c340;
}

/* --- Specific Form Styling --- */
.image-preview-container {
    margin-bottom: 15px;
    text-align: center;
}

.image-preview {
    max-width: 100%;
    max-height: 200px;
    border: 1px solid #30363d;
    border-radius: 8px;
    display: none;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: #e6edf3;
}

.beta-tag {
    background-color: #30363d;
    color: #8b949e;
    font-size: 0.8rem;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: 12px;
    vertical-align: middle;
    margin-left: 8px;
}

/* --- Result Display --- */
.result {
    margin-top: 20px;
    padding: 15px;
    background-color: #161b22;
    border-left: 4px solid #ffd866;
    border-radius: 4px;
    font-size: 1.1rem;
    font-weight: 500;
    min-height: 24px;
}

/* --- Footer --- */
footer {
    text-align: center;
    padding: 20px;
    background-color: #161b22;
    border-top: 1px solid #30363d;
    font-size: 0.9rem;
    color: #8b949e;
}

/* --- Animations --- */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* --- Housing Predictor Form Grid --- */
.housing-predictor-form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.housing-predictor-form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: #e6edf3;
}

.housing-predictor-form-group input[type="number"] {
    width: 100%;
    padding: 12px;
    background-color: #0d1117;
    color: #e6edf3;
    border: 1px solid #30363d;
    border-radius: 8px;
    font-size: 1rem;
    margin-bottom: 15px;
    box-sizing: border-box;
}