/* ========================================================================
 * AI Learning — Dashboard Admin
 * Professional E-Learning Theme · v2 (2026-05)
 * Palette Indigo / Violet · Inter + Plus Jakarta Sans + JetBrains Mono
 * ========================================================================
 */

:root{
  /* Surfaces — slate-blue evidente, NON bianco */
  --bg:           #E4E9F2;          /* slate-blue chiaro, visibilmente colorato */
  --bg-mute:      #D8DEEB;          /* zone secondarie, hover di pill bar */
  --surface:      #FFFFFF;          /* topbar e elementi flottanti */
  --card:         #FFFFFF;          /* cards (spiccano bene sul bg colorato) */
  --card-soft:    #F8FAFE;          /* card alternate */
  --border:       #CFD6E3;          /* bordi cards marcati */
  --border-soft:  #DDE3ED;
  --divider:      #E5EAF2;

  /* Brand — Indigo + Violet */
  --brand-50:     #EEEDFE;
  --brand-100:    #E4E2FB;
  --brand-200:    #CECBF6;
  --brand-500:    #7F77DD;
  --brand:        #534AB7;          /* indigo-600 primary */
  --brand-hover:  #3C3489;
  --brand-deep:   #26215C;
  --accent:       #534AB7;          /* alias legacy */
  --accent-hover: #3C3489;
  --accent2:      #7F77DD;          /* violet-600 secondary */
  --grad-brand:   linear-gradient(135deg, #534AB7 0%, #7F77DD 100%);
  --grad-brand-soft: linear-gradient(135deg, rgba(127,119,221,0.10), rgba(175,169,236,0.10));
  --grad-card:    linear-gradient(180deg, #FFFFFF 0%, #FAFAFE 100%);

  /* Semantic — tonalita' 600/700, meno accese ma sempre vivaci */
  --success:      #047857;          /* emerald-600, meno acceso del 500 */
  --success-bg:   rgba(4,120,87,0.10);
  --warn:         #D97706;          /* amber-600 */
  --warn-bg:      rgba(217,119,6,0.10);
  --danger:       #E11D48;          /* rose-600 */
  --danger-bg:    rgba(225,29,72,0.10);
  --info:         #0284C7;          /* sky-600 */
  --info-bg:      rgba(2,132,199,0.10);

  /* Text */
  --text:         #0F172A;          /* slate-900 */
  --text-soft:    #334155;          /* slate-700 */
  --muted:        #64748B;          /* slate-500 */
  --muted-2:      #94A3B8;          /* slate-400 */
  --on-brand:     #FFFFFF;

  /* Misc */
  --phase1:       #534AB7;
  --radius-sm:    8px;
  --radius:       12px;
  --radius-lg:    16px;
  --radius-xl:    20px;
  --radius-full:  9999px;

  --shadow-xs:    0 1px 2px rgba(15,23,42,0.04);
  --shadow-sm:    0 2px 4px rgba(15,23,42,0.04), 0 1px 2px rgba(15,23,42,0.03);
  --shadow-md:    0 4px 12px rgba(15,23,42,0.06), 0 2px 4px rgba(15,23,42,0.04);
  --shadow-lg:    0 16px 40px rgba(15,23,42,0.10), 0 4px 12px rgba(15,23,42,0.06);
  --shadow-xl:    0 24px 64px rgba(15,23,42,0.14);
  --shadow-brand: 0 8px 24px rgba(83,74,183,0.28);
  --shadow-brand-sm: 0 2px 8px rgba(83,74,183,0.18);

  --tr-fast:      150ms cubic-bezier(.4,0,.2,1);
  --tr-base:      220ms cubic-bezier(.4,0,.2,1);
  --tr-slow:      320ms cubic-bezier(.4,0,.2,1);

  --font-sans:    'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-display: 'Plus Jakarta Sans', 'Inter', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', ui-monospace, 'SF Mono', monospace;
}

/* ─── DARK MODE (opt-in via data-theme="dark") ─────────────────────────── */
html[data-theme="dark"]{
  color-scheme:dark;
  --bg:#0f1620; --bg-mute:#18222f; --surface:#16202c; --card:#16202c; --card-soft:#1b2735; --card-alt:#1b2735;
  --border:#2a3644; --border-soft:#243140; --divider:#243140;
  --brand-50:#1a2140; --brand-100:#232c55; --brand-200:#313b74; --brand-500:#AFA9EC;
  --brand:#AFA9EC; --brand-hover:#CECBF6; --brand-deep:#CECBF6;
  --accent:#AFA9EC; --accent-hover:#CECBF6; --accent2:#CECBF6;
  --grad-card:linear-gradient(180deg,#18222f 0%,#141d28 100%);
  --grad-brand-soft:linear-gradient(135deg,rgba(175,169,236,0.14),rgba(206,203,246,0.14));
  --success:#34d399; --success-bg:rgba(52,211,153,0.14);
  --warn:#fbbf24; --warn-bg:rgba(251,191,36,0.14);
  --danger:#fb7185; --danger-bg:rgba(251,113,133,0.14);
  --info:#38bdf8; --info-bg:rgba(56,189,248,0.14);
  --text:#e9eef4; --text-soft:#c2cbd6; --muted:#93a0b0; --muted-2:#6b7889; --on-brand:#0f1620;
  --shadow-xs:0 1px 2px rgba(0,0,0,0.4);
  --shadow-sm:0 2px 4px rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md:0 4px 12px rgba(0,0,0,0.5), 0 2px 4px rgba(0,0,0,0.4);
  --shadow-lg:0 16px 40px rgba(0,0,0,0.6), 0 4px 12px rgba(0,0,0,0.5);
  --shadow-xl:0 24px 64px rgba(0,0,0,0.7);
}
html[data-theme="dark"] body{background:var(--bg)}
html[data-theme="dark"] .topbar{background:rgba(18,26,37,0.82)}
html[data-theme="dark"] thead tr{background:linear-gradient(180deg,#1b2735 0%,#161f2b 100%)}
html[data-theme="dark"] .table-header{background:linear-gradient(180deg,#1b2735 0%,#141d28 100%)}
html[data-theme="dark"] .nav-tab:hover{background:rgba(255,255,255,0.06)}
/* chip/code chiari inline → resi scuri in dark */
html[data-theme="dark"] code[id="pwd-email"]{background:var(--bg-mute) !important;color:var(--text) !important}

*{box-sizing:border-box;margin:0;padding:0}
*::selection{background:var(--brand-100);color:var(--brand-deep)}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:14px;
  line-height:1.5;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  position:relative;
}
/* Aura brand: due gradienti radiali fissi negli angoli top-left e bottom-right,
   bassissima opacita' per dare profondita' senza scurire ne distrarre. */
body::before{
  content:'';
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(900px 600px at 0% 0%, rgba(127,119,221,0.12) 0%, transparent 55%),
    radial-gradient(900px 600px at 100% 100%, rgba(175,169,236,0.10) 0%, transparent 55%);
}
/* Tutto il contenuto sta sopra l'aura */
.topbar, .main, .overlay, #admin-login-screen, #preview-video-modal,
#testo-video-overlay, #preview-text-overlay { position:relative; z-index:1 }

/* ─── TOP BAR ──────────────────────────────────────────────────────────── */
.topbar{
  background:rgba(255,255,255,0.78);
  border-bottom:1px solid var(--border);
  padding:0 32px;
  height:64px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  position:sticky;
  top:0;
  z-index:100;
  backdrop-filter:saturate(180%) blur(14px);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  box-shadow:var(--shadow-xs);
}
/* topbar-brand: ora ospita direttamente l'SVG logo FormaIA monogram
   (nessun ::before gradient, l'SVG include gia' mark + wordmark). */
.topbar-brand{
  display:inline-flex;
  align-items:center;
  text-decoration:none;
  transition:opacity var(--tr-fast);
}
.topbar-brand:hover{opacity:0.85}
.topbar-brand img{display:block}
.topbar-sub{font-size:12px;color:var(--muted);margin-left:14px;font-weight:500}
/* topbar-right: nav-tabs si comprime/scrolla, bottoni a destra restano visibili */
.topbar-right{display:flex;align-items:center;gap:12px;flex:1;min-width:0;justify-content:flex-end}
.topbar-right .nav-tabs{flex:1;min-width:0}

/* ─── NAV TABS (pill bar) ─────────────────────────────────────────────── */
.nav-tabs{
  display:flex;
  gap:2px;
  background:var(--bg-mute);
  border:1px solid var(--border-soft);
  border-radius:var(--radius);
  padding:4px;
  /* Scroll-x quando le tab non ci stanno (anche su desktop tra 800-1280px) */
  overflow-x:auto;
  overflow-y:hidden;
  max-width:100%;
  scrollbar-width:none;            /* Firefox */
  -ms-overflow-style:none;         /* IE/Edge legacy */
}
.nav-tabs::-webkit-scrollbar{display:none}  /* Chromium/Safari */
.nav-tab{flex-shrink:0}
.nav-tab{
  padding:8px 16px;
  border-radius:8px;
  font-size:13px;
  font-weight:500;
  cursor:pointer;
  border:none;
  background:transparent;
  color:var(--muted);
  font-family:var(--font-sans);
  transition:color var(--tr-fast), background var(--tr-fast), transform var(--tr-fast);
  position:relative;
  white-space:nowrap;
}
.nav-tab:hover{color:var(--text);background:rgba(255,255,255,0.7)}
.nav-tab.active{
  background:var(--surface);
  color:var(--brand);
  font-weight:600;
  box-shadow:var(--shadow-xs), 0 0 0 1px var(--border);
}

/* ─── MAIN ────────────────────────────────────────────────────────────── */
.main{
  padding:32px;
  max-width:1440px;
  margin:0 auto;
}
.tab-panel{display:none}
.tab-panel.active{display:block;animation:fadeUp .25s cubic-bezier(.4,0,.2,1)}
@keyframes fadeUp{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}

/* ─── KPI CARDS ───────────────────────────────────────────────────────── */
.kpi-row{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:16px;
  margin-bottom:28px;
}
.kpi{
  background:var(--grad-card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:22px 24px;
  position:relative;
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  transition:transform var(--tr-base), box-shadow var(--tr-base);
}
.kpi:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}
.kpi::before{
  content:'';
  position:absolute;
  top:0;left:0;right:0;
  height:3px;
  border-radius:var(--radius-lg) var(--radius-lg) 0 0;
}
.kpi::after{
  content:'';
  position:absolute;
  right:-30px;top:-30px;
  width:120px;height:120px;
  border-radius:50%;
  opacity:0.06;
}
.kpi.blue::before{background:var(--grad-brand)}
.kpi.green::before{background:linear-gradient(90deg,#047857,#059669)}
.kpi.warn::before{background:linear-gradient(90deg,#D97706,#F59E0B)}
.kpi.red::before{background:linear-gradient(90deg,#E11D48,#F43F5E)}
.kpi.blue::after{background:var(--brand)}
.kpi.green::after{background:var(--success)}
.kpi.warn::after{background:var(--warn)}
.kpi.red::after{background:var(--danger)}
.kpi-label{
  font-size:11px;
  color:var(--muted);
  text-transform:uppercase;
  letter-spacing:0.08em;
  font-weight:600;
  margin-bottom:10px;
}
.kpi-value{
  font-family:var(--font-display);
  font-size:34px;
  font-weight:700;
  line-height:1;
  letter-spacing:-0.02em;
}
.kpi.blue .kpi-value{color:var(--brand)}
.kpi.green .kpi-value{color:var(--success)}
.kpi.warn .kpi-value{color:var(--warn)}
.kpi.red .kpi-value{color:var(--danger)}
.kpi-sub{font-size:12px;color:var(--muted);margin-top:8px;font-weight:500}

/* ─── TABLE CARD ──────────────────────────────────────────────────────── */
.table-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
}
.table-header{
  padding:20px 24px;
  border-bottom:1px solid var(--divider);
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:12px;
  background:linear-gradient(180deg, #FAFBFD 0%, #FFFFFF 100%);
}
.table-title{
  font-family:var(--font-display);
  font-size:16px;
  font-weight:700;
  color:var(--text);
  letter-spacing:-0.01em;
}
.table-count{font-size:12px;color:var(--muted);font-weight:500}
.search-box{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  padding:8px 14px;
  font-size:13px;
  color:var(--text);
  font-family:var(--font-sans);
  width:240px;
  transition:border-color var(--tr-fast), box-shadow var(--tr-fast);
}
.search-box::placeholder{color:var(--muted-2)}
.search-box:focus{
  outline:none;
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(83,74,183,0.12);
}
table{width:100%;border-collapse:collapse}
thead tr{
  background:linear-gradient(180deg, #FAFBFD 0%, #F4F6FA 100%);
  border-bottom:1px solid var(--divider);
}
th{
  padding:13px 16px;
  text-align:left;
  font-size:11px;
  font-weight:600;
  color:var(--muted);
  text-transform:uppercase;
  letter-spacing:0.08em;
  white-space:nowrap;
}
td{
  padding:14px 16px;
  font-size:13px;
  color:var(--text-soft);
  border-top:1px solid var(--divider);
  vertical-align:middle;
}
tbody tr{transition:background var(--tr-fast)}
tbody tr:hover td{background:var(--brand-50)}

/* ─── BADGES ──────────────────────────────────────────────────────────── */
.badge{
  display:inline-flex;
  align-items:center;
  gap:4px;
  padding:3px 10px;
  border-radius:var(--radius-full);
  font-size:11px;
  font-weight:600;
  font-family:var(--font-sans);
  letter-spacing:0.01em;
  white-space:nowrap;
}
.badge-green{background:var(--success-bg);color:var(--success)}
.badge-red{background:var(--danger-bg);color:var(--danger)}
.badge-gray{background:rgba(100,116,139,0.10);color:var(--muted)}
.badge-warn{background:var(--warn-bg);color:var(--warn)}
.badge-blue{background:var(--brand-50);color:var(--brand-deep)}

/* ─── SCORE BAR ───────────────────────────────────────────────────────── */
.score-bar-wrap{display:flex;align-items:center;gap:8px}
.score-bar-bg{flex:1;height:6px;background:var(--bg-mute);border-radius:var(--radius-full);min-width:60px;overflow:hidden}
.score-bar-fill{height:100%;border-radius:var(--radius-full);transition:width .5s cubic-bezier(.4,0,.2,1);background:var(--grad-brand)}
.score-val{font-family:var(--font-mono);font-size:12px;min-width:34px;font-weight:500}
.mono{font-family:var(--font-mono);font-size:12px}
.text-muted{color:var(--muted)}

/* ─── AVATAR ──────────────────────────────────────────────────────────── */
.avatar{
  width:34px;height:34px;
  border-radius:50%;
  background:var(--grad-brand);
  border:2px solid #fff;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:12px;
  font-weight:700;
  color:#fff;
  margin-right:10px;
  vertical-align:middle;
  letter-spacing:0.02em;
  box-shadow:var(--shadow-xs);
}

/* ─── STATE / SPINNER ─────────────────────────────────────────────────── */
.state-msg{
  padding:64px 32px;
  text-align:center;
  color:var(--muted);
  font-size:14px;
}
.spinner{
  width:36px;height:36px;
  border:3px solid var(--bg-mute);
  border-top-color:var(--brand);
  border-radius:50%;
  animation:spin .8s linear infinite;
  margin:0 auto 16px;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* ─── INPUTS / SELECT / BUTTON ────────────────────────────────────────── */
select.filter,
select.form-select{
  background:var(--surface);
  color:var(--text);
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  padding:7px 32px 7px 12px;
  font-size:13px;
  font-family:var(--font-sans);
  cursor:pointer;
  transition:border-color var(--tr-fast), box-shadow var(--tr-fast);
  appearance:none;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%2364748B'><path d='M5.516 7.548l4.484 4.484 4.484-4.484z'/></svg>");
  background-repeat:no-repeat;
  background-position:right 8px center;
  background-size:16px;
}
select.filter:focus,
select.form-select:focus{
  outline:none;
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(83,74,183,0.12);
}

.btn{
  padding:9px 18px;
  border-radius:var(--radius-sm);
  font-size:13px;
  font-weight:600;
  cursor:pointer;
  font-family:var(--font-sans);
  border:none;
  transition:transform var(--tr-fast), box-shadow var(--tr-fast),
             background var(--tr-fast), color var(--tr-fast),
             border-color var(--tr-fast), opacity var(--tr-fast);
  display:inline-flex;
  align-items:center;
  gap:6px;
  white-space:nowrap;
  line-height:1.2;
}
.btn:active{transform:translateY(1px)}
.btn:disabled{opacity:.55;cursor:not-allowed;transform:none !important}

.btn-primary{
  background:var(--grad-brand);
  color:var(--on-brand);
  box-shadow:var(--shadow-brand-sm);
}
.btn-primary:hover{box-shadow:var(--shadow-brand);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}

.btn-ghost{
  background:var(--surface);
  color:var(--text-soft);
  border:1px solid var(--border);
}
.btn-ghost:hover{background:var(--bg-mute);border-color:var(--muted-2);color:var(--text)}

.btn-danger{background:var(--danger);color:#fff}
.btn-danger:hover{background:#E11D48;box-shadow:0 4px 12px rgba(244,63,94,0.30)}

.btn-warn{background:var(--warn);color:#fff}
.btn-warn:hover{background:#D97706}

.btn-sm{padding:6px 12px;font-size:12px}

/* ─── FORM CARD ───────────────────────────────────────────────────────── */
.form-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:28px;
  margin-bottom:20px;
  box-shadow:var(--shadow-sm);
  transition:box-shadow var(--tr-base);
}
.form-card:hover{box-shadow:var(--shadow-md)}
.form-card-title{
  font-family:var(--font-display);
  font-size:16px;
  font-weight:700;
  color:var(--text);
  letter-spacing:-0.01em;
  margin-bottom:20px;
  display:flex;
  align-items:center;
  gap:10px;
  padding-bottom:14px;
  border-bottom:1px solid var(--divider);
}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.form-grid.cols3{grid-template-columns:repeat(3,1fr)}
.form-group{display:flex;flex-direction:column;gap:6px}
.form-group.full{grid-column:1/-1}
label{
  font-size:12px;
  color:var(--text-soft);
  font-weight:600;
  letter-spacing:0.02em;
}
input[type=text],input[type=number],input[type=email],input[type=url],input[type=password],
select.form-select,textarea{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  padding:10px 14px;
  font-size:14px;
  color:var(--text);
  font-family:var(--font-sans);
  width:100%;
  transition:border-color var(--tr-fast), box-shadow var(--tr-fast);
}
input[type=text]::placeholder,input[type=email]::placeholder,
input[type=number]::placeholder,input[type=url]::placeholder,
textarea::placeholder{color:var(--muted-2)}
input[type=text]:focus,input[type=number]:focus,input[type=email]:focus,
input[type=url]:focus,input[type=password]:focus,
select.form-select:focus,textarea:focus{
  outline:none;
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(83,74,183,0.12);
}

/* ─── DROP ZONE ───────────────────────────────────────────────────────── */
.drop-zone{
  border:2px dashed var(--border);
  border-radius:var(--radius);
  padding:36px 24px;
  text-align:center;
  cursor:pointer;
  transition:all var(--tr-base);
  background:var(--bg);
}
.drop-zone:hover,.drop-zone.dragover{
  border-color:var(--brand);
  background:var(--brand-50);
  transform:translateY(-1px);
}
.drop-zone-icon{font-size:36px;margin-bottom:10px;opacity:0.85}
.drop-zone-text{font-size:14px;color:var(--text);font-weight:600}
.drop-zone-sub{font-size:12px;color:var(--muted);margin-top:4px}

.file-list{margin-top:12px;display:flex;flex-direction:column;gap:6px}
.file-item{
  background:var(--bg-mute);
  border:1px solid var(--border-soft);
  border-radius:var(--radius-sm);
  padding:10px 14px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  font-size:13px;
}
.file-item-name{display:flex;align-items:center;gap:8px;color:var(--text)}
.file-remove{background:none;border:none;color:var(--muted);cursor:pointer;font-size:16px;padding:0 4px;transition:color var(--tr-fast)}
.file-remove:hover{color:var(--danger)}

/* ─── ALERT ───────────────────────────────────────────────────────────── */
.alert{
  padding:14px 18px;
  border-radius:var(--radius);
  font-size:13px;
  margin-bottom:16px;
  display:none;
  border:1px solid transparent;
  line-height:1.5;
}
.alert.success{background:var(--success-bg);border-color:rgba(16,185,129,0.25);color:#047857}
.alert.error{background:var(--danger-bg);border-color:rgba(244,63,94,0.25);color:#BE123C}
.alert.info{background:var(--info-bg);border-color:rgba(14,165,233,0.25);color:#0369A1}
.alert.warn{background:var(--warn-bg);border-color:rgba(245,158,11,0.25);color:#B45309}

/* ─── PROGRESS BAR ────────────────────────────────────────────────────── */
.progress-bar-wrap{
  background:var(--bg-mute);
  border-radius:var(--radius-full);
  height:8px;
  overflow:hidden;
  margin-top:8px;
}
.progress-bar{
  height:100%;
  background:var(--grad-brand);
  border-radius:var(--radius-full);
  width:0;
  transition:width .35s cubic-bezier(.4,0,.2,1);
}

/* ─── CORSI LIST ──────────────────────────────────────────────────────── */
.corsi-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(320px,1fr));
  gap:18px;
  margin-top:8px;
}
.corso-card{
  background:var(--grad-card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:22px;
  position:relative;
  box-shadow:var(--shadow-sm);
  transition:transform var(--tr-base), box-shadow var(--tr-base), border-color var(--tr-base);
  overflow:hidden;
}
.corso-card::before{
  content:'';
  position:absolute;
  top:0;left:0;right:0;
  height:4px;
  background:var(--grad-brand);
  opacity:0;
  transition:opacity var(--tr-base);
}
.corso-card:hover{
  transform:translateY(-3px);
  box-shadow:var(--shadow-lg);
  border-color:var(--brand-200);
}
.corso-card:hover::before{opacity:1}
.corso-card-header{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  margin-bottom:14px;
}
.corso-card-name{
  font-family:var(--font-display);
  font-size:16px;
  font-weight:700;
  color:var(--text);
  letter-spacing:-0.01em;
}
.corso-card-code{
  font-family:var(--font-mono);
  font-size:11px;
  color:var(--brand);
  background:var(--brand-50);
  border-radius:var(--radius-sm);
  padding:2px 8px;
  margin-top:6px;
  display:inline-block;
  font-weight:600;
}
.corso-card-stats{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:8px;
  margin-bottom:14px;
}
.corso-stat{
  background:var(--bg);
  border:1px solid var(--border-soft);
  border-radius:var(--radius-sm);
  padding:10px;
  text-align:center;
}
.corso-stat-val{
  font-family:var(--font-display);
  font-size:18px;
  font-weight:700;
  color:var(--text);
  line-height:1.1;
}
.corso-stat-lbl{font-size:10px;color:var(--muted);margin-top:3px;text-transform:uppercase;letter-spacing:0.05em;font-weight:600}
.corso-card-actions{display:flex;gap:8px;flex-wrap:wrap}

/* ─── DETAIL OVERLAY ──────────────────────────────────────────────────── */
.overlay{
  position:fixed;
  inset:0;
  background:rgba(15,23,42,0.50);
  backdrop-filter:blur(6px);
  z-index:200;
  display:none;
  align-items:center;
  justify-content:center;
  animation:fadeIn .2s ease;
}
.overlay.open{display:flex}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.overlay-panel{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius-xl);
  padding:32px;
  width:580px;
  max-height:88vh;
  overflow-y:auto;
  position:relative;
  box-shadow:var(--shadow-xl);
  animation:slideUp .25s cubic-bezier(.4,0,.2,1);
}
@keyframes slideUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
.overlay-close{
  position:absolute;
  top:16px;right:16px;
  background:var(--bg-mute);
  border:1px solid var(--border);
  color:var(--text-soft);
  border-radius:var(--radius-sm);
  padding:6px 12px;
  cursor:pointer;
  font-size:13px;
  font-family:var(--font-sans);
  font-weight:600;
  transition:background var(--tr-fast), color var(--tr-fast);
}
.overlay-close:hover{background:var(--danger-bg);color:var(--danger)}
.overlay-title{
  font-family:var(--font-display);
  font-size:22px;
  font-weight:800;
  color:var(--text);
  letter-spacing:-0.02em;
  margin-bottom:4px;
}
.overlay-sub{font-size:13px;color:var(--muted);margin-bottom:24px}

.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:20px}
.detail-stat{
  background:var(--bg);
  border:1px solid var(--border-soft);
  border-radius:var(--radius);
  padding:16px;
}
.detail-stat-label{
  font-size:10px;
  color:var(--muted);
  text-transform:uppercase;
  letter-spacing:0.1em;
  font-weight:600;
  margin-bottom:6px;
}
.detail-stat-value{
  font-family:var(--font-display);
  font-size:22px;
  font-weight:700;
  color:var(--text);
  letter-spacing:-0.01em;
}
.section-label{
  font-size:12px;
  font-weight:700;
  color:var(--muted);
  text-transform:uppercase;
  letter-spacing:0.08em;
  margin:24px 0 12px;
}
.tentativo-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:12px 16px;
  background:var(--bg);
  border:1px solid var(--border-soft);
  border-radius:var(--radius);
  margin-bottom:6px;
  transition:border-color var(--tr-fast), background var(--tr-fast);
}
.tentativo-row:hover{border-color:var(--brand-200);background:var(--brand-50)}

/* ─── LOGIN SCREEN (override per look premium) ────────────────────────── */
#admin-login-screen{
  background:
    radial-gradient(circle at 15% 10%, rgba(127,119,221,0.18) 0%, transparent 40%),
    radial-gradient(circle at 85% 90%, rgba(175,169,236,0.18) 0%, transparent 40%),
    var(--bg) !important;
}
#admin-login-screen > div{
  background:var(--surface) !important;
  border-radius:var(--radius-xl) !important;
  box-shadow:var(--shadow-xl) !important;
  border:1px solid var(--border) !important;
  padding:38px !important;
}

/* ─── MODAL ANTEPRIMA VIDEO ───────────────────────────────────────────── */
#preview-video-modal {
  display:none;position:fixed;inset:0;z-index:9999;
  background:rgba(15,23,42,0.50);backdrop-filter:blur(6px);
  align-items:center;justify-content:center;
}
#preview-video-modal.open { display:flex !important; }
.preview-modal-box {
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius-xl);
  padding:28px;width:90%;max-width:780px;
  max-height:85vh;display:flex;flex-direction:column;gap:16px;
  box-shadow:var(--shadow-xl);
}
.preview-modal-header {
  display:flex;align-items:center;justify-content:space-between;
  border-bottom:1px solid var(--divider);padding-bottom:14px;
}
.preview-modal-title { font-family:var(--font-display);font-size:18px;font-weight:700;color:var(--text);letter-spacing:-0.01em }
.preview-modal-subtitle { font-size:12px;color:var(--muted);margin-top:2px; }
.preview-modal-body { flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:12px; }
.preview-chunk-item {
  background:var(--bg);border:1px solid var(--border-soft);
  border-radius:var(--radius);padding:14px;display:flex;flex-direction:column;gap:8px;
}
.preview-chunk-header {
  display:flex;align-items:center;justify-content:space-between;
  font-size:12px;font-weight:700;color:var(--muted);letter-spacing:0.5px;
}
.preview-chunk-title { font-size:13px;font-weight:700;color:var(--brand); }
.preview-chunk-textarea {
  width:100%;background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-sm);color:var(--text);font-family:var(--font-sans);
  font-size:13px;line-height:1.6;padding:10px 12px;resize:vertical;
  min-height:80px;max-height:200px;outline:none;
  transition:border-color var(--tr-fast), box-shadow var(--tr-fast);
}
.preview-chunk-textarea:focus { border-color:var(--brand);box-shadow:0 0 0 3px rgba(83,74,183,0.12); }
.preview-char-count { font-size:11px;color:var(--muted);text-align:right; }
.preview-modal-footer {
  display:flex;align-items:center;justify-content:space-between;
  border-top:1px solid var(--divider);padding-top:14px;flex-wrap:wrap;gap:10px;
}
.preview-info { font-size:12px;color:var(--muted); }

#testo-video-overlay,
#preview-text-overlay {
  position: fixed !important;
  inset: 0 !important;
  z-index: 9999 !important;
  width: 100vw !important;
  height: 100vh !important;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(15,23,42,0.50);
  backdrop-filter:blur(6px);
}
#testo-video-overlay.open,
#preview-text-overlay.open {
  display: flex !important;
}

/* ─── SCROLLBAR (sottile, su brand su hover) ──────────────────────────── */
*::-webkit-scrollbar{width:10px;height:10px}
*::-webkit-scrollbar-track{background:transparent}
*::-webkit-scrollbar-thumb{background:var(--border);border-radius:var(--radius-full);border:2px solid var(--bg)}
*::-webkit-scrollbar-thumb:hover{background:var(--muted-2)}

/* ─── UTILITY ─────────────────────────────────────────────────────────── */
.gradient-text{
  background:var(--grad-brand);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}
.divider{height:1px;background:var(--divider);margin:20px 0}

/* ═════════════════════════════════════════════════════════════════════════
   MOBILE — tablet (≤768px) e smartphone (≤480px)
   ═════════════════════════════════════════════════════════════════════════ */

@media (max-width: 768px) {
  .topbar{padding:0 14px;height:auto;min-height:60px;flex-wrap:wrap;gap:10px;padding-top:10px;padding-bottom:10px}
  .topbar > div{min-width:0}
  .topbar-brand{font-size:16px}
  .topbar-brand::before{width:24px;height:24px;vertical-align:-6px;margin-right:8px}
  .topbar-sub{font-size:11px;margin-left:6px}
  .topbar-right{flex-wrap:wrap;gap:8px;justify-content:flex-end}

  .nav-tabs{overflow-x:auto;overflow-y:hidden;max-width:100%;padding:4px;gap:2px;
    -webkit-overflow-scrolling:touch;scrollbar-width:none}
  .nav-tabs::-webkit-scrollbar{display:none}
  .nav-tab{padding:7px 12px;font-size:12px;white-space:nowrap;flex-shrink:0}

  .main{padding:18px 14px;max-width:100%}

  .kpi-row{grid-template-columns:repeat(2,1fr);gap:10px;margin-bottom:18px}
  .kpi{padding:16px}
  .kpi-value{font-size:26px}
  .kpi-label{font-size:10px}

  .table-card{border-radius:var(--radius)}
  .table-header{padding:14px 16px;flex-direction:column;align-items:stretch;gap:10px}
  .table-header > div{width:100%}
  .table-header > div:last-child{flex-wrap:wrap;display:flex;gap:8px}
  .search-box{width:100%}
  .table-card > div:not(.table-header){overflow-x:auto;-webkit-overflow-scrolling:touch}
  table{min-width:600px}

  .form-card{padding:20px;border-radius:var(--radius)}
  .form-card-title{font-size:15px;margin-bottom:14px;padding-bottom:10px}
  .form-grid{grid-template-columns:1fr !important;gap:14px}
  .form-grid.cols3{grid-template-columns:1fr !important}

  .corsi-grid{grid-template-columns:1fr;gap:12px}
  .corso-card{padding:18px}

  .overlay-panel{width:calc(100vw - 24px) !important;max-width:100%;padding:24px;border-radius:var(--radius-lg);margin:12px}
  .detail-grid{grid-template-columns:1fr 1fr;gap:8px}
  .detail-stat{padding:12px}
  .detail-stat-value{font-size:18px}

  .drop-zone{padding:24px 14px}
  .drop-zone-icon{font-size:28px}

  .btn{padding:8px 14px;font-size:12px}
  .btn-sm{padding:5px 10px;font-size:11px}

  #tab-live > div:last-child{grid-template-columns:1fr !important;gap:12px}
  .live-event{padding:8px 12px;font-size:12px}

  #admin-login-screen > div{width:calc(100vw - 28px);max-width:400px;padding:28px 22px !important}
}

@media (max-width: 480px) {
  .topbar-sub{display:none}
  .topbar-right #admin-user-label{display:none}
  .nav-tab{padding:6px 10px;font-size:11px}

  .kpi-row{grid-template-columns:1fr}
  .kpi{padding:14px}

  #tab-live > div:first-child{flex-direction:column;gap:10px;align-items:stretch}
  #tab-live > div:first-child > div:last-child{flex-direction:row;gap:8px}

  .detail-grid{grid-template-columns:1fr}

  .overlay-close{padding:4px 8px;font-size:11px;top:10px;right:10px}
  .overlay-title{font-size:18px}
}

@media (max-height: 500px) and (orientation: landscape) {
  .topbar{min-height:44px}
  .main{padding-top:10px}
}

/* ═════════════════════════════════════════════════════════════════════════
   WCAG 2.1 AA — Accessibilita'
   ═════════════════════════════════════════════════════════════════════════ */
*:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
  border-radius: 4px;
}
*:focus:not(:focus-visible) { outline: none; }

.skip-link {
  position: absolute; top: -40px; left: 8px;
  background: var(--brand); color: #fff; padding: 8px 16px;
  border-radius: 0 0 8px 8px; font-weight: 600; font-size: 13px;
  z-index: 9999; text-decoration: none; transition: top .2s;
}
.skip-link:focus { top: 0; outline: 2px solid var(--text); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ── TEMA SAPIA ACADEMY ─────────────────────────────────────────────────────
 * Palette dal logo: notte, indaco, scintilla (CTA), salvia, carta.
 * Sfondo caldo al posto dello slate-blue di FormaIA; CTA ambra con testo notte. */
:root{
  --notte:#26215C; --scintilla:#EF9F27; --scintilla-hover:#DB8B14; --on-scintilla:#26215C;
  --bg:#EFEDE6; --bg-mute:#E4E1D8; --card-soft:#FBFAF7;
  --border:#D6D2C6; --border-soft:#E3E0D6; --divider:#EAE7DE;
  --brand-500:#7F77DD; --brand:#534AB7; --brand-hover:#3C3489; --brand-deep:#26215C;
  --accent:#534AB7; --accent-hover:#3C3489; --accent2:#EF9F27;
  --grad-brand: linear-gradient(135deg, #26215C 0%, #534AB7 100%);
  --grad-brand-soft: linear-gradient(135deg, rgba(83,74,183,0.08), rgba(239,159,39,0.10));
  --grad-card: linear-gradient(180deg, #FFFFFF 0%, #FBFAF7 100%);
  --success:#1D9E75; --success-bg:rgba(29,158,117,0.12);
  --warn:#BA7517; --warn-bg:rgba(239,159,39,0.14);
  --danger:#C2412D; --danger-bg:rgba(194,65,45,0.10);
  --text:#26215C; --text-soft:#3F3A63; --muted:#6B687A; --muted-2:#9A97A6;
  --shadow-xs:0 1px 2px rgba(38,33,92,0.05);
  --shadow-sm:0 2px 4px rgba(38,33,92,0.05), 0 1px 2px rgba(38,33,92,0.04);
  --shadow-md:0 4px 12px rgba(38,33,92,0.08), 0 2px 4px rgba(38,33,92,0.05);
  --shadow-lg:0 16px 40px rgba(38,33,92,0.12), 0 4px 12px rgba(38,33,92,0.07);
  --shadow-xl:0 24px 64px rgba(38,33,92,0.16);
  --shadow-brand:0 8px 24px rgba(239,159,39,0.30);
  --shadow-brand-sm:0 2px 8px rgba(239,159,39,0.22);
}
.btn-primary{background:var(--scintilla);color:var(--on-scintilla)}
.btn-primary:hover{background:var(--scintilla-hover);color:var(--on-scintilla)}
html[data-theme="dark"]{
  --bg:#14112E; --bg-mute:#1F1A45; --surface:#1A163A; --card:#1A163A; --card-soft:#211C4A; --card-alt:#211C4A;
  --border:#322B6B; --border-soft:#2A2459; --divider:#2A2459;
  --brand:#AFA9EC; --brand-hover:#CECBF6; --accent:#AFA9EC; --accent-hover:#CECBF6;
  --text:#F1EFFA; --text-soft:#CECBF6; --muted:#AFA9EC; --muted-2:#7F77DD;
  --grad-card:linear-gradient(180deg,#1F1A45 0%,#1A163A 100%);
}
html[data-theme="dark"] .topbar{background:rgba(26,22,58,0.85)}
html[data-theme="dark"] thead tr, html[data-theme="dark"] .table-header{background:linear-gradient(180deg,#211C4A 0%,#1A163A 100%)}