/* ═══════════════════════════════════════════════════════════════
   Sibilla — L'Oracolo AI
   ═══════════════════════════════════════════════════════════════ */

:root {
    --bg: #0f0f14;
    --surface: #1a1a24;
    --surface-hover: #22222e;
    --border: #2a2a3a;
    --text: #e8e8ed;
    --text-muted: #8888a0;
    --accent: #a78bfa;
    --accent-glow: #c4b5fd;
    --success: #34d399;
    --danger: #f87171;
    --radius: 12px;
    --transition: 0.2s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    justify-content: center;
}

.container {
    max-width: 800px;
    width: 100%;
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ── Header ──────────────────────────────────────────────────── */

header {
    text-align: center;
    margin-bottom: 3rem;
    padding-top: 3rem;
}

header h1 {
    font-size: 2.8rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent), var(--accent-glow));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1.05rem;
}

/* ── Search Box ──────────────────────────────────────────────── */

.search-box {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.search-box textarea {
    width: 100%;
    padding: 1rem 1.25rem;
    background: var(--surface);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 1.05rem;
    font-family: inherit;
    resize: vertical;
    min-height: 80px;
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
}

.search-box textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(167, 139, 250, 0.15);
}

.search-box textarea::placeholder {
    color: var(--text-muted);
}

#submit-btn {
    align-self: flex-end;
    padding: 0.75rem 1.75rem;
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    border: none;
    border-radius: var(--radius);
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
}

#submit-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(167, 139, 250, 0.35);
}

#submit-btn:active {
    transform: translateY(0);
}

#submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* ── Response Area ───────────────────────────────────────────── */

.response-area {
    flex: 1;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ── Loading ─────────────────────────────────────────────────── */

.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
    color: var(--text-muted);
}

.spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ── Answer ──────────────────────────────────────────────────── */

.answer {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    line-height: 1.7;
    font-size: 1.02rem;
}

.answer h1, .answer h2, .answer h3 {
    margin-top: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--accent-glow);
}

.answer h1 { font-size: 1.5rem; }
.answer h2 { font-size: 1.25rem; }
.answer h3 { font-size: 1.1rem; }

.answer p {
    margin-bottom: 0.75rem;
}

.answer ul, .answer ol {
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
}

.answer li {
    margin-bottom: 0.35rem;
}

.answer code {
    background: rgba(167, 139, 250, 0.1);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-size: 0.9em;
}

.answer pre {
    background: rgba(0, 0, 0, 0.3);
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    margin-bottom: 0.75rem;
}

.answer blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 1rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

/* ── Sources ─────────────────────────────────────────────────── */

.sources {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
}

.sources h3 {
    color: var(--accent-glow);
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.source-item {
    display: block;
    padding: 0.6rem 0.75rem;
    border-radius: 8px;
    color: var(--text);
    text-decoration: none;
    transition: background var(--transition);
    margin-bottom: 0.25rem;
    font-size: 0.9rem;
}

.source-item:hover {
    background: var(--surface-hover);
}

.source-item .source-title {
    font-weight: 500;
    color: var(--accent-glow);
}

.source-item .source-url {
    color: var(--text-muted);
    font-size: 0.8rem;
    display: block;
    margin-top: 0.15rem;
    word-break: break-all;
}

/* ── Error ───────────────────────────────────────────────────── */

.error-box {
    background: rgba(248, 113, 113, 0.1);
    border: 1px solid var(--danger);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    color: var(--danger);
}

/* ── Footer ──────────────────────────────────────────────────── */

footer {
    text-align: center;
    padding: 1.5rem 0;
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-top: auto;
}