/* ── Reset ─────────────────────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

/* ── Variabili ─────────────────────────────────────── */
:root {
    --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-display: Georgia, 'Times New Roman', serif;

    --purple-50: #faf5ff;
    --purple-100: #f3e8ff;
    --purple-200: #e9d5ff;
    --purple-300: #d8b4fe;
    --purple-400: #c084fc;
    --purple-500: #a855f7;
    --purple-600: #9333ea;
    --purple-700: #7e22ce;
    --purple-800: #6b21a8;
    --purple-900: #581c87;
    --purple-950: #3b0764;

    --bg: #faf8ff;
    --bg-card: #ffffff;
    --text-1: #1c1025;
    --text-2: #5b526a;
    --text-3: #8e84a0;
    --border: rgba(107, 33, 168, 0.08);
    --border-hover: rgba(107, 33, 168, 0.18);
    --ring: rgba(147, 51, 234, 0.25);

    --shadow-sm: 0 1px 3px rgba(59, 7, 100, 0.04), 0 1px 2px rgba(59, 7, 100, 0.02);
    --shadow-md: 0 4px 16px rgba(59, 7, 100, 0.06), 0 2px 6px rgba(59, 7, 100, 0.03);
    --shadow-lg: 0 12px 32px rgba(59, 7, 100, 0.08), 0 4px 12px rgba(59, 7, 100, 0.04);

    --radius: 16px;
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Dark mode ─────────────────────────────────────── */
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0e0a14;
        --bg-card: #1a1225;
        --text-1: #f0ecf4;
        --text-2: #b5adc4;
        --text-3: #7e7494;
        --border: rgba(168, 85, 247, 0.1);
        --border-hover: rgba(168, 85, 247, 0.22);
        --ring: rgba(168, 85, 247, 0.3);
        --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
        --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.25);
        --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.35);
    }
}

/* ── Base ──────────────────────────────────────────── */
html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--text-1);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
}

a { color: inherit; text-decoration: none; }

/* ── Header ────────────────────────────────────────── */
.hero {
    position: relative;
    overflow: hidden;
    padding: 3rem 1.5rem 2.5rem;
    text-align: center;
    background:
        radial-gradient(ellipse 80% 60% at 50% 0%, var(--purple-800) 0%, transparent 70%),
        radial-gradient(ellipse 50% 80% at 80% 20%, var(--purple-900) 0%, transparent 60%),
        radial-gradient(ellipse 50% 80% at 20% 30%, var(--purple-950) 0%, transparent 60%),
        var(--purple-950);
    color: #fff;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='1' cy='1' r='1' fill='rgba(255,255,255,0.03)'/%3E%3C/svg%3E");
    pointer-events: none;
}

.hero-inner { position: relative; max-width: 680px; margin: 0 auto; }

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 400;
    letter-spacing: -0.01em;
    line-height: 1.15;
    margin-bottom: 0.6rem;
}

.hero-title img { width: 0.85em; height: 0.85em; vertical-align: -0.08em; margin-right: 0.15em; }

.hero-sub { font-size: 1.05rem; opacity: 0.78; max-width: 480px; margin: 0 auto; }

.hero-stats { display: flex; justify-content: center; gap: 2.5rem; margin-top: 1.8rem; flex-wrap: wrap; }

.hero-stat-num { display: block; font-family: var(--font-display); font-size: 1.6rem; }

.hero-stat-label { font-size: 0.8rem; opacity: 0.65; text-transform: uppercase; letter-spacing: 0.06em; }

/* ── Filtri ────────────────────────────────────────── */
.filters {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    padding: 1.5rem 1rem 0.5rem;
    flex-wrap: wrap;
    max-width: 900px;
    margin: 0 auto;
}

.filter-btn {
    font-family: var(--font-body);
    font-size: 0.82rem;
    font-weight: 600;
    padding: 0.45rem 1rem;
    border-radius: 100px;
    border: 1.5px solid var(--border);
    background: var(--bg-card);
    color: var(--text-2);
    cursor: pointer;
    transition: all 0.2s var(--ease);
    white-space: nowrap;
}

.filter-btn:hover {
    border-color: var(--border-hover);
    color: var(--text-1);
    box-shadow: 0 0 0 3px var(--ring);
}

.filter-btn.active {
    background: var(--purple-700);
    color: #fff;
    border-color: var(--purple-700);
}

@media (prefers-color-scheme: dark) {
    .filter-btn.active { background: var(--purple-600); border-color: var(--purple-600); }
}

.filter-btn .filter-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 0.35rem;
    vertical-align: -0.5px;
}

/* ── Container ─────────────────────────────────────── */
.container { max-width: 1200px; margin: 0 auto; padding: 1rem 1rem 3rem; }

/* ── Grid ──────────────────────────────────────────── */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }

@media (max-width: 1024px) { .grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px)  { .grid { grid-template-columns: 1fr; gap: 1rem; } }

/* ── Card ──────────────────────────────────────────── */
.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s var(--ease);
    animation: cardIn 0.4s var(--ease) both;
}

.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: var(--border-hover); }

@keyframes cardIn {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

.card-img { position: relative; height: 170px; overflow: hidden; cursor: pointer; }

.card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s var(--ease); }

.card:hover .card-img img { transform: scale(1.04); }

.card-img-placeholder {
    width: 100%; height: 100%;
    display: flex; align-items: center; justify-content: center;
    font-size: 2rem;
    background: linear-gradient(135deg, var(--purple-700), var(--purple-500));
    color: rgba(255, 255, 255, 0.5);
}

@media (prefers-color-scheme: dark) {
    .card-img-placeholder { background: linear-gradient(135deg, var(--purple-900), var(--purple-800)); }
}

/* badge sorgente — colore via inline style dal JS */
.card-source {
    position: absolute;
    top: 0.65rem;
    left: 0.65rem;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 0.22rem 0.65rem;
    border-radius: 100px;
    color: #fff;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    line-height: 1.5;
}

/* categoria (community) — nel footer della card */
.card-category {
    font-size: 0.65rem;
    font-weight: 600;
    padding: 0.15rem 0.5rem;
    border-radius: 100px;
    background: var(--border);
    color: var(--text-2);
    white-space: nowrap;
}

.card-body { padding: 1rem 1.15rem; flex: 1; display: flex; flex-direction: column; }

.card-title {
    font-size: 1rem; font-weight: 600; line-height: 1.4; margin-bottom: 0.5rem;
    display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}

.card-title a { transition: color 0.2s var(--ease); }
.card-title a:hover { color: var(--purple-600); }

@media (prefers-color-scheme: dark) { .card-title a:hover { color: var(--purple-300); } }

.card-desc {
    font-size: 0.85rem; color: var(--text-2); line-height: 1.55;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; flex: 1;
}

.card-foot {
    padding: 0 1.15rem 0.9rem;
    display: flex; align-items: center; justify-content: space-between;
    font-size: 0.75rem; color: var(--text-3); gap: 0.5rem;
}

.card-author { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 55%; }

.card-meta-right { display: flex; align-items: center; gap: 0.7rem; flex-shrink: 0; }
.card-meta-right span { display: flex; align-items: center; gap: 0.2rem; }

/* ── Loading / Error ───────────────────────────────── */
.state-msg { text-align: center; padding: 4rem 1rem; }

.spinner {
    width: 36px; height: 36px;
    border: 3px solid var(--border); border-top-color: var(--purple-600);
    border-radius: 50%; animation: spin 0.7s linear infinite; margin: 0 auto 1rem;
}

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

.state-msg p { color: var(--text-3); font-size: 0.95rem; }

.error-box {
    max-width: 480px; margin: 0 auto;
    background: var(--bg-card); border-radius: var(--radius);
    padding: 2rem; border: 1px solid var(--border);
    box-shadow: var(--shadow-md); border-left: 4px solid #ef4444;
}

.error-box h3 { margin-bottom: 0.3rem; font-size: 1rem; }
.error-box p  { color: var(--text-2); font-size: 0.9rem; }

/* ── Footer ────────────────────────────────────────── */
.page-footer {
    text-align: center; padding: 2rem 1rem 2.5rem;
    border-top: 1px solid var(--border); max-width: 900px; margin: 0 auto;
}

.footer-sources { display: flex; justify-content: center; gap: 1.5rem; flex-wrap: wrap; margin-bottom: 0.8rem; }

.footer-sources a {
    display: inline-flex; align-items: center; gap: 0.35rem;
    font-size: 0.85rem; font-weight: 500; color: var(--text-2);
    transition: color 0.2s var(--ease);
}

.footer-sources a:hover { color: var(--purple-600); }
@media (prefers-color-scheme: dark) { .footer-sources a:hover { color: var(--purple-300); } }

.footer-sources img { height: 16px; width: auto; }

.footer-copy { font-size: 0.78rem; color: var(--text-3); }
.footer-copy a { color: var(--purple-600); font-weight: 500; }
@media (prefers-color-scheme: dark) { .footer-copy a { color: var(--purple-400); } }

/* ── Utility ───────────────────────────────────────── */
.hidden { display: none !important; }

@media (max-width: 640px) {
    .hero { padding: 2.2rem 1rem 2rem; }
    .hero-stats { gap: 1.5rem; }
    .card-img { height: 180px; }
}