/* =====================================================
   SFERA SERVIZI — Stile professionale, corporate
   Palette: blu navy (dal logo) + grigi caldi + accento ocra
   ===================================================== */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600;9..144,700&family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    /* Colori */
    --c-bg:           #f5f4f0;   /* crema-grigio caldo */
    --c-bg-alt:       #eceae3;
    --c-surface:      #ffffff;
    --c-ink:          #1f2933;   /* antracite */
    --c-ink-soft:     #3e4a55;
    --c-muted:        #7a8290;
    --c-line:         #d9d6cf;

    --c-accent:       #0d3070;   /* BLU del logo Sfera */
    --c-accent-dark:  #091f4d;   /* blu più cupo per hover */
    --c-accent-soft:  #e5ebf3;   /* azzurrino delicato */
    --c-terra:        #b8703a;   /* terra bruciata - per badge categoria */
    --c-ochre:        #c8923f;   /* ocra dorato - per numeri stats */

    /* Tipografia */
    --font-serif: 'Fraunces', 'Source Serif Pro', Georgia, serif;
    --font-sans:  'Inter', -apple-system, sans-serif;

    /* Spacing fluido */
    --sp-xs: clamp(0.5rem, 1vw, 0.75rem);
    --sp-s:  clamp(0.75rem, 1.5vw, 1.25rem);
    --sp-m:  clamp(1.5rem, 3vw, 2.5rem);
    --sp-l:  clamp(3rem, 6vw, 5rem);
    --sp-xl: clamp(5rem, 10vw, 8rem);

    --maxw: 1280px;
}

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

html { scroll-behavior: smooth; }

body {
    background: var(--c-bg);
    color: var(--c-ink);
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

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

img { max-width: 100%; height: auto; display: block; }

::selection { background: var(--c-accent); color: var(--c-bg); }

/* ---------- TIPOGRAFIA ---------- */
h1, h2, h3, h4 {
    font-family: var(--font-serif);
    font-weight: 500;
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--c-ink);
}

h1 { font-size: clamp(2.8rem, 7vw, 5.5rem); font-weight: 500; }
h2 { font-size: clamp(2rem, 4.5vw, 3.5rem); }
h3 { font-size: clamp(1.4rem, 2.5vw, 2rem); }

.eyebrow {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--c-accent);
    margin-bottom: var(--sp-s);
    position: relative;
    padding-left: 28px;
}
.eyebrow::before {
    content: '';
    position: absolute;
    left: 0; top: 50%;
    width: 18px;
    height: 1px;
    background: var(--c-accent);
}

.lead {
    font-size: clamp(1.05rem, 1.4vw, 1.25rem);
    color: var(--c-ink-soft);
    line-height: 1.55;
    max-width: 60ch;
}

/* ---------- LAYOUT ---------- */
.container {
    width: min(100% - 3rem, var(--maxw));
    margin-inline: auto;
}

.container-narrow {
    width: min(100% - 3rem, 900px);
    margin-inline: auto;
}

section { padding-block: var(--sp-l); }

/* ---------- NAVBAR ---------- */
.nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(245, 242, 236, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(214, 209, 198, 0.5);
}
.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.1rem 0;
}
.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-serif);
    font-size: 22px;
    font-weight: 600;
    color: var(--c-ink);
    letter-spacing: -0.01em;
}
.brand-mark {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    display: block;
    object-fit: contain;
}

.nav-links {
    display: flex;
    gap: 2.2rem;
    align-items: center;
    list-style: none;
}
.nav-links a {
    font-size: 14px;
    font-weight: 500;
    color: var(--c-ink-soft);
    transition: color 0.2s;
    position: relative;
}
.nav-links a:hover, .nav-links a.active {
    color: var(--c-accent);
}
.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0; right: 0;
    height: 2px;
    background: var(--c-accent);
}
.nav-cta {
    background: var(--c-ink);
    color: var(--c-bg) !important;
    padding: 9px 18px;
    border-radius: 100px;
    font-size: 13.5px;
    transition: background 0.2s;
}
.nav-cta:hover { background: var(--c-accent); }

.nav-reserved {
    font-size: 12.5px !important;
    color: var(--c-muted) !important;
    padding: 6px 12px;
    border-radius: 100px;
    border: 1px solid var(--c-line);
    transition: all 0.2s;
}
.nav-reserved::before {
    content: '🔒 ';
    font-size: 11px;
    opacity: 0.7;
}
.nav-reserved:hover {
    color: var(--c-accent) !important;
    border-color: var(--c-accent);
    background: var(--c-accent-soft);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    width: 32px;
    height: 32px;
    cursor: pointer;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
}
.nav-toggle span {
    width: 22px;
    height: 1.5px;
    background: var(--c-ink);
    transition: 0.3s;
}

/* ---------- BUTTONS ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    background: var(--c-ink);
    color: var(--c-bg);
    border-radius: 100px;
    font-size: 14.5px;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: all 0.25s;
    font-family: inherit;
}
.btn:hover {
    background: var(--c-accent);
    transform: translateY(-1px);
}
.btn-primary {
    background: var(--c-accent);
}
.btn-primary:hover {
    background: var(--c-accent-dark);
}
.btn-outline {
    background: transparent;
    color: var(--c-ink);
    border: 1.5px solid var(--c-ink);
}
.btn-outline:hover {
    background: var(--c-ink);
    color: var(--c-bg);
}
.btn .arrow {
    transition: transform 0.25s;
}
.btn:hover .arrow { transform: translateX(4px); }

/* ---------- HERO ---------- */
.hero {
    padding-block: clamp(4rem, 10vw, 8rem) clamp(5rem, 10vw, 8rem);
    position: relative;
    overflow: hidden;
}
.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--sp-l);
    align-items: end;
}
.hero h1 {
    font-style: normal;
}
.hero h1 em {
    font-style: italic;
    color: var(--c-accent);
    font-weight: 400;
}
.hero-meta {
    border-top: 1px solid var(--c-line);
    padding-top: var(--sp-s);
    margin-top: var(--sp-m);
}
.hero-meta .label {
    font-size: 11px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--c-muted);
    margin-bottom: 8px;
}
.hero-meta .value {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    color: var(--c-ink);
}
.hero-actions {
    display: flex;
    gap: 14px;
    margin-top: var(--sp-m);
    flex-wrap: wrap;
}

/* Decorazione hero - cerchi sovrapposti */
.hero-mark {
    position: absolute;
    top: 10%;
    right: -5%;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, var(--c-accent-soft), transparent 70%);
    z-index: -1;
    opacity: 0.6;
}

/* ---------- STATS BAR ---------- */
.stats {
    background: var(--c-ink);
    color: var(--c-bg);
    padding-block: var(--sp-m);
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--sp-m);
}
.stat-item .num {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 3.2rem);
    font-weight: 500;
    line-height: 1;
    color: var(--c-bg);
    display: block;
    margin-bottom: 8px;
}
.stat-item .num span { color: var(--c-ochre); }
.stat-item .lbl {
    font-size: 12.5px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(245, 242, 236, 0.7);
}

/* ---------- SEZIONI ---------- */
.section-head {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-m);
    margin-bottom: var(--sp-l);
    align-items: end;
}
.section-head .lead { justify-self: end; }

/* ---------- SERVIZI CARDS ---------- */
.servizi-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--c-line);
    border: 1px solid var(--c-line);
}
.servizio {
    background: var(--c-bg);
    padding: var(--sp-m);
    transition: background 0.25s;
    display: flex;
    flex-direction: column;
    gap: var(--sp-s);
    min-height: 280px;
}
.servizio:hover {
    background: var(--c-surface);
}
.servizio .num {
    font-family: var(--font-serif);
    font-size: 0.9rem;
    color: var(--c-muted);
    font-feature-settings: 'tnum';
}
.servizio h3 {
    font-size: 1.5rem;
    margin: 0;
}
.servizio p {
    color: var(--c-ink-soft);
    font-size: 14.5px;
    line-height: 1.55;
    flex-grow: 1;
}
.servizio .link {
    color: var(--c-accent);
    font-size: 13.5px;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: auto;
}
.servizio .link::after {
    content: '→';
    transition: transform 0.2s;
}
.servizio:hover .link::after { transform: translateX(4px); }

/* ---------- CORSI GRID ---------- */
.corsi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--sp-s);
}
.corso-card {
    background: var(--c-surface);
    border: 1px solid var(--c-line);
    border-radius: 4px;
    padding: var(--sp-s);
    transition: all 0.25s;
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-height: 200px;
}
.corso-card:hover {
    border-color: var(--c-accent);
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(20, 32, 28, 0.06);
}
.corso-card .cat {
    font-size: 10.5px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--c-terra);
    font-weight: 600;
}
.corso-card h4 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 500;
    line-height: 1.2;
    margin: 0;
    color: var(--c-ink);
}
.corso-card .meta {
    display: flex;
    gap: 14px;
    font-size: 12.5px;
    color: var(--c-muted);
    margin-top: auto;
    padding-top: 10px;
    border-top: 1px solid var(--c-line);
}
.corso-card .meta strong {
    color: var(--c-ink);
    font-weight: 600;
}

/* Filtri catalogo corsi */
.corsi-filtri {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: var(--sp-m);
    padding-bottom: var(--sp-s);
    border-bottom: 1px solid var(--c-line);
}
.filter-btn {
    background: transparent;
    border: 1px solid var(--c-line);
    padding: 7px 16px;
    border-radius: 100px;
    font-size: 13px;
    color: var(--c-ink-soft);
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}
.filter-btn:hover {
    border-color: var(--c-ink);
    color: var(--c-ink);
}
.filter-btn.active {
    background: var(--c-ink);
    color: var(--c-bg);
    border-color: var(--c-ink);
}

/* ---------- BANNER CTA ---------- */
.cta-banner {
    background: var(--c-ink);
    color: var(--c-bg);
    padding: var(--sp-l);
    border-radius: 12px;
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--sp-m);
    align-items: center;
    position: relative;
    overflow: hidden;
}
.cta-banner h2 {
    color: var(--c-bg);
    font-style: italic;
    font-weight: 400;
}
.cta-banner h2 em {
    font-style: normal;
    color: var(--c-ochre);
}
.cta-banner p {
    color: rgba(245, 242, 236, 0.75);
    margin-top: var(--sp-s);
    max-width: 50ch;
}
.cta-banner .btn {
    background: var(--c-bg);
    color: var(--c-ink);
}
.cta-banner .btn:hover {
    background: var(--c-ochre);
    color: var(--c-ink);
}
.cta-banner::before {
    content: '';
    position: absolute;
    right: -100px; top: -100px;
    width: 300px; height: 300px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(200, 160, 74, 0.15), transparent 70%);
}

/* ---------- FORM CONTATTI ---------- */
.form-card {
    background: var(--c-surface);
    border: 1px solid var(--c-line);
    border-radius: 8px;
    padding: var(--sp-m);
}
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-s);
    margin-bottom: var(--sp-s);
}
.form-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.form-field.full { grid-column: 1 / -1; }
.form-field label {
    font-size: 11px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--c-muted);
    font-weight: 600;
}
.form-field input,
.form-field select,
.form-field textarea {
    padding: 12px 14px;
    border: 1px solid var(--c-line);
    border-radius: 4px;
    background: var(--c-bg);
    color: var(--c-ink);
    font-family: inherit;
    font-size: 15px;
    transition: border-color 0.2s, background 0.2s;
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
    outline: none;
    border-color: var(--c-accent);
    background: var(--c-surface);
}
.form-field textarea { resize: vertical; min-height: 110px; }

/* ---------- INFO CONTATTI ---------- */
.contatti-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--sp-l);
    align-items: start;
}
.info-blocks {
    display: flex;
    flex-direction: column;
    gap: var(--sp-m);
}
.info-block {
    border-top: 1px solid var(--c-line);
    padding-top: var(--sp-s);
}
.info-block .label {
    font-size: 11px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--c-muted);
    margin-bottom: 6px;
}
.info-block .value {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    color: var(--c-ink);
    line-height: 1.4;
}
.info-block a { color: var(--c-accent); }

/* ---------- VALORI / CHI SIAMO ---------- */
.valori-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--sp-m) var(--sp-l);
}
.valore {
    border-top: 2px solid var(--c-ink);
    padding-top: var(--sp-s);
}
.valore .num {
    font-family: var(--font-serif);
    font-size: 0.9rem;
    color: var(--c-terra);
    font-weight: 600;
    margin-bottom: 12px;
}
.valore h3 {
    margin-bottom: 12px;
}
.valore p {
    color: var(--c-ink-soft);
    font-size: 15px;
}

/* ---------- FOOTER ---------- */
.footer {
    background: var(--c-ink);
    color: var(--c-bg);
    padding-block: var(--sp-l) var(--sp-m);
    margin-top: var(--sp-l);
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--sp-m);
    margin-bottom: var(--sp-m);
}
.footer h4 {
    font-family: var(--font-sans);
    font-size: 12px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: rgba(245, 242, 236, 0.5);
    font-weight: 600;
    margin-bottom: 16px;
}
.footer ul { list-style: none; }
.footer li { margin-bottom: 9px; }
.footer a {
    color: rgba(245, 242, 236, 0.8);
    font-size: 14px;
    transition: color 0.2s;
}
.footer a:hover { color: var(--c-ochre); }
.footer .brand {
    color: var(--c-bg);
    margin-bottom: 12px;
}
.footer .brand-mark { /* è l'immagine del logo, niente background da impostare */ }
.footer-desc {
    color: rgba(245, 242, 236, 0.6);
    font-size: 14px;
    max-width: 32ch;
}
.footer-bottom {
    border-top: 1px solid rgba(245, 242, 236, 0.12);
    padding-top: var(--sp-s);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 12.5px;
    color: rgba(245, 242, 236, 0.5);
}

/* ---------- BANNER DOCENTI (homepage) ---------- */
.docenti-banner {
    background: var(--c-surface);
    border: 1px solid var(--c-line);
    border-radius: 12px;
    padding: var(--sp-m);
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: var(--sp-m);
    align-items: center;
    transition: border-color 0.25s, box-shadow 0.25s;
}
.docenti-banner:hover {
    border-color: var(--c-accent);
    box-shadow: 0 6px 24px rgba(13, 48, 112, 0.06);
}
.docenti-banner-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--c-accent-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.docenti-banner-eyebrow {
    font-size: 11px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--c-terra);
    font-weight: 600;
    margin-bottom: 6px;
}
.docenti-banner-title {
    font-family: var(--font-serif);
    font-size: 1.6rem;
    font-weight: 500;
    margin: 0 0 6px;
    line-height: 1.2;
}
.docenti-banner-title em {
    font-style: italic;
    color: var(--c-accent);
    font-weight: 400;
}
.docenti-banner-desc {
    margin: 0;
    color: var(--c-ink-soft);
    font-size: 14.5px;
    max-width: 60ch;
}
.docenti-banner-btn {
    white-space: nowrap;
}

/* ---------- PAGE HEADER (interne) ---------- */
.page-header {
    padding-block: clamp(4rem, 7vw, 6rem) clamp(2rem, 4vw, 3rem);
    border-bottom: 1px solid var(--c-line);
}
.page-header h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: var(--sp-s);
}
.page-header h1 em {
    font-style: italic;
    color: var(--c-accent);
    font-weight: 400;
}

/* ---------- ANIMAZIONI ---------- */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}
.fade-up {
    opacity: 0;
    animation: fadeUp 0.8s ease forwards;
}
.fade-up.d1 { animation-delay: 0.1s; }
.fade-up.d2 { animation-delay: 0.25s; }
.fade-up.d3 { animation-delay: 0.4s; }
.fade-up.d4 { animation-delay: 0.55s; }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 900px) {
    .hero-grid,
    .section-head,
    .contatti-grid,
    .cta-banner {
        grid-template-columns: 1fr;
        gap: var(--sp-m);
    }
    .docenti-banner {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--sp-s);
    }
    .docenti-banner-icon { margin-inline: auto; }
    .docenti-banner-desc { margin-inline: auto; }
    .docenti-banner-btn { justify-self: center; }
    .section-head .lead { justify-self: start; }
    .servizi-grid { grid-template-columns: 1fr; }
    .valori-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: var(--sp-s); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .nav-toggle { display: flex; }
    .nav-links {
        position: absolute;
        top: 100%;
        left: 0; right: 0;
        background: var(--c-bg);
        flex-direction: column;
        padding: var(--sp-s);
        border-bottom: 1px solid var(--c-line);
        display: none;
    }
    .nav-links.open { display: flex; }
    .hero-mark { display: none; }
}
@media (max-width: 540px) {
    .footer-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
}