/* Variables */
:root {
    --primary: #4361ee;
    --secondary: #3f37c9;
    --accent: #7209b7;
    --success: #4cc9f0;
    --danger: #f72585;
    --dark: #0d1b2a;
    --light: #f8f9fa;
    --grey: #8d99ae;
    --card-shadow: 0 10px 20px rgba(0,0,0,0.08), 0 4px 6px rgba(0,0,0,0.04);
}

/* Layout Styles */
body, html {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: linear-gradient(135deg, #e0f7fa, #f3e5f5);
    height: 100%;
    color: var(--dark);
}

#app-container {
    margin: 0 auto;
    padding: 20px;
}

.header {
    background: linear-gradient(to right, var(--primary), var(--secondary));
    color: white;
    padding: 30px 20px;
    border-radius: 20px;
    margin-bottom: 25px;
    box-shadow: var(--card-shadow);
    text-align: center;
}

.header h1 {
    margin: 0;
    font-size: 2.8rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.header p {
    font-size: 1.1rem;
    margin-bottom: 0;
    opacity: 0.9;
}

.content {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    margin-bottom: 30px;
}

/* Controls Section */
.controls {
    flex: 1;
    min-width: 350px;
    background: white;
    border-radius: 20px;
    padding: 25px;
    box-shadow: var(--card-shadow);
}

.model-selector {
    margin-bottom: 25px;
}

.model-selector label {
    font-weight: 600;
    margin-bottom: 10px;
    display: block;
    color: var(--secondary);
    font-size: 1.1rem;
}

.model-selector select {
    width: 100%;
    padding: 14px;
    border-radius: 12px;
    border: 2px solid var(--grey);
    font-size: 1rem;
    transition: border-color 0.3s;
}

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

.model-info {
    margin-top: 15px;
    padding: 12px;
    background: var(--light);
    border-radius: 12px;
    font-size: 0.9rem;
}

.system-prompt-area {
    margin-bottom: 25px;
}

.system-prompt-area label {
    font-weight: 600;
    margin-bottom: 10px;
    display: block;
    color: var(--secondary);
    font-size: 1.1rem;
}

.system-prompt-area textarea {
    min-height: 120px;
    font-size: 0.95rem;
}

.tips {
    background: #eef2ff;
    padding: 18px;
    border-radius: 15px;
    font-size: 0.92rem;
}

.tips h3 {
    margin-top: 0;
    color: var(--accent);
}

.tips ul {
    padding-left: 20px;
}

.tips li {
    margin-bottom: 8px;
}

/* Chat Section */
.chat-container {
    flex: 2;
    min-width: 500px;
}

.chat-area {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.chat-input {
    background: white;
    border-radius: 20px;
    padding: 25px;
    box-shadow: var(--card-shadow);
}

.chat-input label {
    font-weight: 600;
    margin-bottom: 15px;
    display: block;
    color: var(--secondary);
    font-size: 1.1rem;
}

.chat-input textarea {
    min-height: 150px;
    font-size: 1rem;
}

.btn-submit {
    background: linear-gradient(to right, var(--primary), var(--accent));
    color: white;
    border: none;
    padding: 14px 25px;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.3s, opacity 0.3s;
    width: 100%;
    letter-spacing: 0.5px;
}

.btn-submit:hover {
    transform: translateY(-2px);
    opacity: 0.92;
}

.chat-output {
    background: white;
    border-radius: 20px;
    padding: 25px;
    box-shadow: var(--card-shadow);
}

.chat-output label {
    font-weight: 600;
    margin-bottom: 15px;
    display: block;
    color: var(--secondary);
}

.chat-output textarea {
    min-height: 250px;
    font-size: 1rem;
}

.examples {
    background: white;
    border-radius: 20px;
    padding: 25px;
    box-shadow: var(--card-shadow);
    margin-top: 25px;
}

.examples h3 {
    margin-top: 0;
    color: var(--primary);
}

.footer {
    text-align: center;
    padding: 20px;
    color: var(--dark);
    font-size: 0.95rem;
    margin-top: 30px;
}

.footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

.footer img {
    margin-top: 15px;
    border-radius: 10px;
}

/* Responsive adjustments */
@media (max-width: 900px) {
    .content {
        flex-direction: column;
    }
    
    .controls, .chat-container {
        min-width: 100%;
    }
}

/* Model selector chips styling */
.models-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 18px;
    margin-top: 25px;
}

.model-card {
    background: white;
    border-radius: 15px;
    padding: 17px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    box-shadow: 0 4px 8px rgba(0,0,0,0.06);
}

.model-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 20px rgba(0,0,0,0.12);
    border-color: var(--primary);
}

.model-card.active {
    background: var(--light);
    border-color: var(--primary);
}

.model-card h4 {
    margin: 0 0 10px 0;
    color: var(--primary);
}

.model-card p {
    margin: 0;
    font-size: 0.9rem;
    color: var(--dark);
}