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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: #f7f5f2;
    color: #1a1a1a;
    font-size: 16px;
    line-height: 1.6;
}

.container {
    max-width: 640px;
    margin: 0 auto;
    padding: 24px 20px 48px;
}

header {
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 2px solid #1a1a1a;
}

h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: #1a1a1a;
}

.subtitle {
    color: #555;
    font-size: 1rem;
}

.field {
    margin-bottom: 20px;
}

label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    font-size: 0.95rem;
}

input, select, textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #ccc;
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
    background: #fff;
    transition: border-color 0.2s;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: #1a1a1a;
}

button {
    width: 100%;
    padding: 14px;
    background: #1a1a1a;
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    margin-top: 8px;
    transition: background 0.2s;
}

button:hover { background: #333; }
button:disabled { background: #999; cursor: not-allowed; }

button.secondary {
    background: transparent;
    color: #1a1a1a;
    border: 2px solid #1a1a1a;
    margin-top: 16px;
}

button.secondary:hover { background: #f0f0f0; }

#response-area {
    margin-top: 32px;
    padding: 24px;
    background: #fff;
    border-radius: 8px;
    border-left: 4px solid #1a1a1a;
}

#response-content {
    line-height: 1.8;
    white-space: pre-wrap;
}

#followup-area {
    margin-top: 16px;
}

#followup-input {
    margin-bottom: 8px;
}

.hidden { display: none; }

.loading {
    color: #555;
    font-style: italic;
}

footer {
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid #ddd;
    font-size: 0.85rem;
    color: #777;
}

footer a { color: #1a1a1a; }

@media (max-width: 480px) {
    h1 { font-size: 1.6rem; }
    .container { padding: 16px 16px 40px; }
}