:root {
    --bg-color: #f5f5f0; /* Off-white / marble-ish */
    --text-color: #2c2c2c; /* Charcoal */
    --accent-color: #8c8c8c; /* Stone grey */
    --font-serif: 'Cormorant Garamond', serif;
    --font-sans: 'Inter', sans-serif;
    --spacing-unit: 1.5rem;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-sans);
    margin: 0;
    padding: 0;
    line-height: 1.6;
    display: flex;
    justify-content: center;
    min-height: 100vh;
}

.stoa-container {
    width: 100%;
    max-width: 700px;
    padding: var(--spacing-unit);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stoa-header {
    margin-top: 3rem;
    margin-bottom: 2rem;
    text-align: center;
}

.stoa-header h1 {
    font-family: var(--font-serif);
    font-size: 3rem;
    font-weight: 300; /* Lighter weight for elegance */
    margin: 0;
    letter-spacing: 0.05em;
}

.subtitle {
    font-family: var(--font-serif);
    font-style: italic;
    color: var(--accent-color);
    margin-top: 0.5rem;
}

.stoa-content {
    width: 100%;
}

.input-area textarea {
    width: 100%;
    border: 1px solid #d4d4d4;
    background-color: transparent;
    padding: 1rem;
    font-family: var(--font-sans);
    font-size: 1.1rem;
    border-radius: 4px;
    resize: vertical;
    outline: none;
    transition: border-color 0.3s ease;
}

.input-area textarea:focus {
    border-color: var(--text-color);
}

.input-area button {
    display: block;
    margin: 1rem auto 0;
    background-color: transparent;
    border: 1px solid var(--text-color);
    color: var(--text-color);
    padding: 0.8rem 2rem;
    font-family: var(--font-serif);
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 2px;
}

.input-area button:hover {
    background-color: var(--text-color);
    color: var(--bg-color);
}

.response-area {
    margin-top: 3rem;
    border-left: 2px solid var(--accent-color);
    padding-left: 1.5rem;
    font-family: var(--font-serif);
    font-size: 1.25rem;
    color: #4a4a4a;
    min-height: 50px;
}

.stoa-footer {
    margin-top: auto;
    padding-top: 3rem;
    font-size: 0.8rem;
    color: var(--accent-color);
    text-align: center;
}

.htmx-indicator {
    display: none;
    text-align: center;
    margin-top: 1rem;
    color: var(--accent-color);
    font-style: italic;
    font-family: var(--font-serif);
}

.htmx-request .htmx-indicator {
    display: block;
}

.htmx-request.htmx-indicator {
    display: block;
}

.fade-in {
    animation: fadeIn 1.5s ease-out forwards;
    opacity: 0;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}