/* ========================================================================
 * Sapia Academy — formazione discente
 * Estratto da <style> inline di formazione.html
 * ========================================================================
 */

:root {
  /* Light theme — Learning Platform palette
   * Background morbido (off-white con leggero tinta blu) e card bianche
   * pulite. Primary blu accessibile (4.6:1 su bianco — WCAG AA).
   * Accent secondario verde successo, warn arancio caldo, danger rosso
   * desaturato. Text dark navy per contrasto ottimale su bianco.
   */
  --bg:        #F7F6F2;       /* page background — morbido */
  --surface:   #FFFFFF;       /* topbar, sidebar */
  --card:      #FFFFFF;       /* card, input bg */
  --border:    #E2E8F0;       /* bordi gentili */
  --accent:    #534AB7;       /* indaco Sapia — 7:1 vs white */
  --accent-hover: #3C3489;    /* indaco hover */
  --accent2:   #7F77DD;       /* lavanda secondary */
  --success:   #047857;       /* verde successo */
  --warn:      #D97706;       /* arancione caldo */
  --danger:    #DC2626;       /* rosso accessibile */
  --text:      #1E293B;       /* navy scuro per text — 14:1 vs bg */
  --muted:     #64748B;       /* grigio per testo secondario — 4.6:1 */
  --phase1:    #534AB7;       /* didattica = blu */
  --phase2:    #7F77DD;       /* interattiva = ciano */
  --phase3:    #D97706;       /* verifica = arancio */
  --shadow-sm: 0 1px 2px rgba(15,23,42,0.05);
  --shadow-md: 0 4px 12px rgba(15,23,42,0.08);
  --shadow-lg: 0 10px 30px rgba(15,23,42,0.12);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;background:var(--bg);color:var(--text);font-family:'Inter',sans-serif;-webkit-font-smoothing:antialiased;overflow:hidden}

/* ── BACKGROUND DECOR ── (luce ambient, niente noise) */
body::before{content:'';position:fixed;inset:0;background:
  radial-gradient(circle at 0% 0%, rgba(37,99,235,0.04), transparent 50%),
  radial-gradient(circle at 100% 100%, rgba(8,145,178,0.04), transparent 50%);
  pointer-events:none;z-index:0}

/* ── LOGIN SCREEN ── */
#login-screen{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;z-index:100;
  background:radial-gradient(circle at 15% 10%,rgba(37,99,235,0.16) 0%,transparent 42%),
             radial-gradient(circle at 85% 90%,rgba(8,145,178,0.16) 0%,transparent 42%),
             var(--bg)}
.login-box{width:420px;padding:48px;background:var(--surface);border:1px solid var(--border);border-radius:20px;position:relative;overflow:hidden;box-shadow:var(--shadow-lg)}
.login-box::before{content:'';position:absolute;top:-80px;right:-80px;width:200px;height:200px;background:radial-gradient(circle,rgba(37,99,235,0.06),transparent 70%);pointer-events:none}
.login-logo{font-family:'Syne',sans-serif;font-size:13px;font-weight:700;letter-spacing:0.2em;text-transform:uppercase;color:var(--accent);margin-bottom:32px;display:flex;align-items:center;gap:8px}
.login-logo span{width:8px;height:8px;background:var(--accent);border-radius:50%;display:inline-block;box-shadow:0 0 10px var(--accent)}
.login-title{font-family:'Syne',sans-serif;font-size:28px;font-weight:800;line-height:1.1;margin-bottom:8px}
.login-sub{font-size:13px;color:var(--muted);margin-bottom:36px;line-height:1.6}
.field{margin-bottom:16px}
.field label{display:block;font-size:11px;font-weight:500;letter-spacing:0.1em;text-transform:uppercase;color:var(--muted);margin-bottom:8px}
.field input,.field select{width:100%;padding:12px 16px;background:var(--card);border:1px solid var(--border);border-radius:10px;color:var(--text);font-family:'Inter',sans-serif;font-size:14px;outline:none;transition:border-color 0.2s}
.field input:focus,.field select:focus{border-color:var(--accent)}
.field select option{background:var(--card)}
.login-btn{width:100%;padding:14px;background:var(--accent);color:#fff;border:none;border-radius:10px;font-family:'Syne',sans-serif;font-size:14px;font-weight:700;letter-spacing:0.05em;cursor:pointer;margin-top:8px;transition:all 0.2s}
.login-btn:hover{transform:translateY(-1px);box-shadow:0 8px 24px rgba(37,99,235,0.18)}
.login-err{font-size:12px;color:var(--danger);margin-top:12px;text-align:center;display:none}

/* ── MAIN APP ── */
#app{display:none;height:100vh;flex-direction:column;position:relative;z-index:1}

/* ── TOPBAR ── */
.topbar{display:flex;align-items:center;justify-content:space-between;padding:0 28px;height:56px;background:var(--surface);border-bottom:1px solid var(--border);flex-shrink:0}
.topbar-left{display:flex;align-items:center;gap:20px}
.brand{font-family:'Syne',sans-serif;font-size:13px;font-weight:700;letter-spacing:0.15em;text-transform:uppercase;color:var(--accent)}
.course-name{font-size:13px;color:var(--muted);padding-left:20px;border-left:1px solid var(--border)}
.topbar-right{display:flex;align-items:center;gap:16px}
.user-pill{display:flex;align-items:center;gap:8px;padding:6px 12px;background:var(--card);border:1px solid var(--border);border-radius:20px;font-size:12px;color:var(--muted)}
.user-pill strong{color:var(--text);font-weight:500}
.lang-sel{padding:4px 8px;background:transparent;border:1px solid var(--border);border-radius:6px;color:var(--muted);font-size:11px;cursor:pointer;outline:none}
.lang-sel option{background:var(--card)}

/* ── PHASE BAR ── */
.phase-bar{display:flex;align-items:center;gap:0;padding:0 28px;height:48px;background:var(--surface);border-bottom:1px solid var(--border);flex-shrink:0}
.phase-tab{display:flex;align-items:center;gap:8px;padding:0 20px;height:100%;font-size:12px;font-weight:500;letter-spacing:0.05em;text-transform:uppercase;color:var(--muted);cursor:pointer;border-bottom:2px solid transparent;transition:all 0.2s;user-select:none}
.phase-tab.active.p1{color:var(--phase1);border-bottom-color:var(--phase1)}
.phase-tab.active.p2{color:var(--phase2);border-bottom-color:var(--phase2)}
.phase-tab.active.p3{color:var(--phase3);border-bottom-color:var(--phase3)}
.phase-tab .ph-num{width:20px;height:20px;border-radius:50%;border:1.5px solid currentColor;display:flex;align-items:center;justify-content:center;font-size:10px;font-family:'JetBrains Mono',monospace}
.phase-tab.locked{opacity:0.35;cursor:not-allowed}
.progress-info{margin-left:auto;font-size:11px;color:var(--muted);font-family:'JetBrains Mono',monospace}

/* ── CONTENT AREA ── */
.content{flex:1;display:flex;overflow:hidden}

/* ── SIDEBAR ── */
.sidebar{width:var(--sidebar-w,260px);background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0;overflow:hidden;min-width:180px;max-width:560px}

/* ── SIDEBAR RESIZE HANDLE ── (drag per ridimensionare la sidebar) */
.sidebar-resizer{
  width:6px;
  cursor:col-resize;
  background:transparent;
  border-right:1px solid var(--border);
  flex-shrink:0;
  position:relative;
  transition:background .15s, border-color .15s;
  user-select:none;
  z-index:5;
}
.sidebar-resizer:hover,
.sidebar-resizer.resizing{
  background:rgba(37,99,235,0.12);
  border-right-color:var(--accent);
}
.sidebar-resizer::after{
  content:'';
  position:absolute;
  top:50%;left:50%;transform:translate(-50%,-50%);
  width:2px;height:32px;
  background:var(--border);
  border-radius:1px;
  transition:background .15s;
}
.sidebar-resizer:hover::after,
.sidebar-resizer.resizing::after{background:var(--accent)}
/* Durante il drag: blocca selezione testo nell'intera pagina */
body.sidebar-resizing{cursor:col-resize;user-select:none}
body.sidebar-resizing *{user-select:none !important;cursor:col-resize !important}
.sidebar-section{padding:20px;border-bottom:1px solid var(--border)}
.sidebar-label{font-size:10px;font-weight:600;letter-spacing:0.15em;text-transform:uppercase;color:var(--muted);margin-bottom:12px}
.profile-card{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:14px;box-shadow:var(--shadow-sm)}
.profile-name{font-family:'Syne',sans-serif;font-size:15px;font-weight:700;margin-bottom:4px}
.profile-sub{font-size:11px;color:var(--muted)}
.stat-row{display:flex;justify-content:space-between;margin-top:12px;padding-top:12px;border-top:1px solid var(--border)}
.stat{text-align:center}
.stat-val{font-family:'JetBrains Mono',monospace;font-size:18px;font-weight:500;color:var(--accent)}
.stat-key{font-size:10px;color:var(--muted);margin-top:2px}

/* TOC "Contenuti": sfrutta tutto lo spazio verticale disponibile nella sidebar.
 * Ora che i Trofei sono in topbar/modal, la TOC eredita davvero tutto lo
 * spazio fra Profilo e Risultati. */
.toc-list{display:flex;flex-direction:column;gap:3px;flex:1;min-height:200px;
  overflow-y:auto;padding-right:4px;scrollbar-gutter:stable}
.toc-item{padding:9px 10px;border-radius:8px;font-size:12.5px;cursor:pointer;
  transition:all 0.15s;display:flex;align-items:flex-start;gap:10px;
  color:var(--muted);line-height:1.35}
.toc-item:hover{background:var(--card);color:var(--text)}
/* Highlight item attivo: blocco rotondato pulito (niente barra a sx che
   l'utente percepiva "tagliata" sul wrap del testo). */
.toc-item.active{background:rgba(37,99,235,0.10);color:var(--accent);
  border:1px solid rgba(37,99,235,0.28);
  padding:8px 9px;  /* compensiamo il +2px del border per non far saltare l'allineamento */
  font-weight:600}
.toc-item.done{color:var(--text)}
.toc-item .toc-dot{width:8px;height:8px;border-radius:50%;background:var(--muted);
  flex-shrink:0;margin-top:5px;position:relative;transition:all .2s}
.toc-item.active .toc-dot{background:var(--accent);box-shadow:0 0 8px var(--accent)}
.toc-item.done .toc-dot{background:var(--phase1)}
.toc-item.done .toc-dot::after{content:'';position:absolute;inset:0;background:
  url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3E%3Cpath d='M2 4l1.5 1.5L6 3' stroke='%23080C14' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center no-repeat}
.toc-item-text{flex:1;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;
  -webkit-line-clamp:2;-webkit-box-orient:vertical;word-break:break-word;
  /* Fallback per assicurare altezza coerente in flex parent */
  max-height:calc(1.35em * 2);line-height:1.35}
.toc-item-num{font-family:'JetBrains Mono',monospace;font-size:10px;color:var(--muted);
  flex-shrink:0;min-width:22px;text-align:right;margin-top:2px}
.toc-item.active .toc-item-num{color:var(--accent)}

/* Header "Contenuti" con contatore progresso */
.toc-progress{font-family:'JetBrains Mono',monospace;font-size:10px;color:var(--accent);
  float:right;font-weight:500}

.score-block{background:var(--card);border-radius:10px;padding:14px}
.score-line{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px;font-size:12px}
.score-bar-wrap{height:4px;background:var(--border);border-radius:2px;overflow:hidden}
.score-bar-fill{height:100%;background:var(--phase3);border-radius:2px;transition:width 0.5s ease}

/* ── MAIN PANEL ── */
.main-panel{flex:1;display:flex;flex-direction:column;overflow-y:auto;overflow-x:hidden;padding:14px 20px;scrollbar-gutter:stable}
.main-panel #phase-1{display:flex;flex-direction:column;gap:10px}

/* ── PHASE 1: DIDATTICA ── */
#phase-1{flex:1;display:flex;flex-direction:column;overflow:hidden}
.lesson-header{padding:6px 4px 0;flex-shrink:0}
.lesson-topic{font-family:'Syne',sans-serif;font-size:18px;font-weight:700;margin-bottom:2px}
.lesson-meta{font-size:11px;color:var(--muted)}
.lesson-body{flex:1;overflow-y:auto;padding:10px 0}
.lesson-content{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:22px 24px;min-height:200px;font-size:15px;line-height:1.75;color:var(--text);position:relative;box-shadow:var(--shadow-sm)}
.lesson-content.loading::after{content:'';position:absolute;bottom:16px;right:16px;width:6px;height:6px;background:var(--accent);border-radius:50%;animation:blink 0.8s infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:0}}
.lesson-content p{margin-bottom:12px}
.lesson-content p:last-child{margin-bottom:0}
.lesson-content strong{color:var(--text);font-weight:700}
.lesson-content ul{padding-left:20px;margin:8px 0}
.lesson-content li{margin-bottom:6px}
/* lesson-nav: bottoni Prev/Counter/Next centrati così il widget tutor a
   destra non sovrappone "Prossimo →". */
.lesson-nav{padding:12px 4px;border-top:1px solid var(--border);display:flex;align-items:center;justify-content:center;gap:18px;flex-shrink:0}
.btn{padding:10px 22px;border-radius:8px;font-family:'Syne',sans-serif;font-size:13px;font-weight:600;cursor:pointer;border:none;transition:all 0.2s;letter-spacing:0.03em}
.btn-ghost{background:transparent;border:1px solid var(--border);color:var(--muted)}
.btn-ghost:hover{border-color:var(--text);color:var(--text)}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 20px rgba(37,99,235,0.18)}
.btn-blue{background:var(--accent2);color:#fff}
.btn-blue:hover{transform:translateY(-1px);box-shadow:0 6px 20px rgba(0,198,255,0.3)}
.btn-warn{background:var(--warn);color:#fff}
.btn-warn:hover{transform:translateY(-1px);box-shadow:0 6px 20px rgba(255,181,71,0.3)}
.btn:disabled{opacity:0.4;cursor:not-allowed;transform:none!important;box-shadow:none!important}
.chunk-counter{font-family:'JetBrains Mono',monospace;font-size:12px;color:var(--muted)}

/* ── PHASE 2: INTERATTIVA ── */
#phase-2{flex:1;display:flex;flex-direction:column;overflow:hidden;display:none}
.chat-window{flex:1;overflow-y:auto;padding:24px 32px;display:flex;flex-direction:column;gap:16px}
.msg{display:flex;gap:12px;animation:fadeUp 0.3s ease}
.msg.user{flex-direction:row-reverse}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
.msg-avatar{width:32px;height:32px;border-radius:50%;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;margin-top:2px}
.msg-avatar.ai{background:linear-gradient(135deg,rgba(37,99,235,0.12),rgba(8,145,178,0.12));border:1px solid rgba(37,99,235,0.18);color:var(--accent);font-family:'Syne',sans-serif}
.msg-avatar.user{background:var(--card);border:1px solid var(--border);color:var(--muted)}
.msg-bubble{max-width:580px;padding:14px 18px;border-radius:16px;font-size:14px;line-height:1.7}
.msg-bubble.ai{background:var(--card);border:1px solid var(--border);border-radius:4px 16px 16px 16px;color:var(--text)}
.msg-bubble.user{background:rgba(8,145,178,0.08);border:1px solid rgba(8,145,178,0.2);border-radius:16px 4px 16px 16px;color:var(--text)}
.msg-bubble strong{color:var(--accent2)}
.chat-input-bar{padding:16px 32px 20px;border-top:1px solid var(--border);flex-shrink:0}
.chat-row{display:flex;gap:10px;align-items:flex-end;background:var(--card);border:1px solid var(--border);border-radius:12px;padding:10px 12px;transition:border-color 0.2s}
.chat-row:focus-within{border-color:var(--accent2)}
.chat-row textarea{flex:1;background:transparent;border:none;outline:none;color:var(--text);font-family:'Inter',sans-serif;font-size:14px;resize:none;min-height:24px;max-height:100px;line-height:1.5}
.chat-row textarea::placeholder{color:var(--muted)}
.send-btn{width:36px;height:36px;background:var(--accent2);border:none;border-radius:8px;cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:all 0.2s}
.send-btn:hover{transform:scale(1.05)}
.send-btn:disabled{background:var(--border);cursor:not-allowed;transform:none}
.send-btn svg{width:16px;height:16px;color:#fff}
.typing-dots{display:flex;gap:4px;padding:6px 0}
.typing-dots span{width:6px;height:6px;background:var(--accent2);border-radius:50%;animation:bounce 1.2s infinite}
.typing-dots span:nth-child(2){animation-delay:0.2s}
.typing-dots span:nth-child(3){animation-delay:0.4s}
@keyframes bounce{0%,60%,100%{transform:translateY(0)}30%{transform:translateY(-6px)}}

/* ── PHASE 3: VERIFICA ── */
#phase-3{flex:1;display:flex;flex-direction:column;overflow:hidden;display:none}
.quiz-area{flex:1;overflow-y:auto;padding:24px 32px}
.quiz-card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:28px;margin-bottom:16px}
.quiz-final{text-align:center;padding:40px 32px;background:var(--card);border:1px solid var(--border);border-radius:20px}
.final-badge{display:inline-block;font-family:'JetBrains Mono',monospace;font-size:13px;font-weight:700;letter-spacing:.12em;padding:6px 20px;border-radius:30px;margin-bottom:20px}
.final-badge.pass{background:rgba(37,99,235,0.1);color:var(--accent);border:1px solid rgba(37,99,235,0.2)}
.final-badge.fail{background:rgba(255,77,109,.12);color:var(--danger);border:1px solid rgba(255,77,109,.3)}
.final-score-big{font-family:'JetBrains Mono',monospace;font-size:72px;font-weight:500;line-height:1;margin:12px 0 4px}
.final-score-big.pass{color:var(--accent)}
.final-score-big.fail{color:var(--danger)}
.final-breakdown{display:flex;justify-content:center;gap:28px;margin:14px 0 20px}
.final-breakdown-item{text-align:center}
.final-breakdown-val{font-family:'JetBrains Mono',monospace;font-size:22px;font-weight:500}
.final-breakdown-lbl{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;margin-top:2px}
.final-divider{width:60px;height:1px;background:var(--border);margin:20px auto}
.final-msg{font-size:15px;color:var(--text);margin-bottom:24px;line-height:1.6}
.final-btns{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}
.final-btns button{padding:11px 24px;border-radius:10px;font-size:14px;font-weight:600;cursor:pointer;font-family:'Inter',sans-serif;border:none;transition:all .2s}
.final-btns .btn-primary{background:var(--accent);color:#fff}
.final-btns .btn-primary:hover{opacity:.88;transform:translateY(-1px)}
.final-btns .btn-ghost{background:transparent;border:1px solid var(--border);color:var(--muted)}
.final-btns .btn-ghost:hover{border-color:var(--text);color:var(--text)}
.quiz-num,.quiz-counter{font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--warn);margin-bottom:12px;letter-spacing:0.1em}
.quiz-q,.quiz-question{font-family:'Syne',sans-serif;font-size:17px;font-weight:600;line-height:1.4;margin-bottom:20px}
.quiz-options{display:flex;flex-direction:column;gap:10px}
.quiz-opt{display:flex;align-items:center;gap:12px;padding:12px 16px;background:var(--card);border:1px solid var(--border);border-radius:10px;cursor:pointer;transition:all 0.15s;font-size:14px;color:var(--text)}
.quiz-opt:hover{border-color:var(--warn);color:var(--text)}
.quiz-opt.selected{border-color:var(--warn);background:rgba(255,181,71,0.08);color:var(--text)}
.quiz-opt.correct{border-color:var(--phase1);background:rgba(37,99,235,0.06);color:var(--phase1)}
.quiz-opt.wrong{border-color:var(--danger);background:rgba(255,94,125,0.08);color:var(--danger)}
.quiz-opt-key,.opt-key{width:26px;height:26px;border-radius:6px;border:1.5px solid currentColor;display:flex;align-items:center;justify-content:center;font-family:'JetBrains Mono',monospace;font-size:11px;flex-shrink:0}
.open-answer{width:100%;background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:14px 16px;color:var(--text);font-family:'Inter',sans-serif;font-size:14px;outline:none;resize:vertical;min-height:80px;transition:border-color 0.2s}
.open-answer:focus{border-color:var(--warn)}
.ai-feedback{margin-top:14px;padding:12px 16px;background:rgba(37,99,235,0.04);border:1px solid rgba(37,99,235,0.1);border-radius:10px;font-size:13px;color:var(--text);line-height:1.6;display:none}
.ai-feedback.show{display:block}
.quiz-nav{padding:20px 32px;border-top:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;flex-shrink:0}
.quiz-textarea{width:100%;min-height:120px;background:var(--surface);border:1px solid var(--border);border-radius:10px;color:var(--text);font-family:'Inter',sans-serif;font-size:14px;padding:12px 16px;resize:vertical;outline:none}
.quiz-textarea:focus{border-color:var(--accent2)}
.btn-quiz-submit{background:var(--accent2);color:#fff;border:none;border-radius:10px;padding:10px 24px;font-size:14px;font-weight:600;cursor:pointer;margin-top:16px;font-family:'Inter',sans-serif}
.btn-quiz-submit:hover{opacity:0.9}
.btn-quiz-submit:disabled{background:var(--border);cursor:not-allowed}
.btn-quiz-next{background:var(--accent);color:#fff;border:none;border-radius:10px;padding:10px 24px;font-size:14px;font-weight:600;cursor:pointer;margin-top:16px;margin-left:12px;font-family:'Inter',sans-serif}
.btn-quiz-next:hover{opacity:0.9}
.quiz-feedback{display:none;padding:12px 16px;border-radius:10px;font-size:14px;margin-top:12px}
.quiz-feedback.correct{background:rgba(37,99,235,0.08);border:1px solid var(--phase1);color:var(--phase1)}
.quiz-feedback.wrong{background:rgba(255,77,109,0.1);border:1px solid var(--danger);color:var(--danger)}
.score-summary{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:32px;text-align:center;display:none}
.score-summary.show{display:block}
.score-big{font-family:'Syne',sans-serif;font-size:64px;font-weight:800;color:var(--warn)}
.score-label{font-size:14px;color:var(--muted);margin-top:4px}

/* ── SCROLLBAR ── */
::-webkit-scrollbar{width:4px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}

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

/* Hamburger toggle per sidebar — nascosto su desktop */
.sidebar-toggle{display:none;background:none;border:1px solid var(--border);border-radius:6px;
  color:var(--muted);padding:6px 10px;cursor:pointer;font-size:16px;line-height:1}
.sidebar-toggle:hover{color:var(--text);border-color:var(--text)}
.sidebar-backdrop{display:none;position:fixed;inset:0;background:rgba(15,23,42,0.4);z-index:49}
.sidebar-backdrop.open{display:block}

@media (max-width: 768px) {
  /* ── TOPBAR compatta ── */
  .topbar{padding:0 14px;height:52px;gap:10px}
  .topbar-left{gap:10px;min-width:0;flex:1}
  .course-name{padding-left:10px;font-size:11px;text-overflow:ellipsis;overflow:hidden;white-space:nowrap;max-width:45vw}
  .topbar-right{gap:8px}
  .user-pill{padding:4px 8px;font-size:11px}
  .sidebar-toggle{display:flex;align-items:center;justify-content:center}

  /* ── SIDEBAR off-canvas ── */
  .sidebar{position:fixed;top:52px;bottom:0;left:0;width:280px;z-index:50;
    transform:translateX(-100%);transition:transform .25s ease;
    box-shadow:4px 0 24px rgba(15,23,42,0.15);min-width:0;max-width:none}
  .sidebar.open{transform:translateX(0)}
  .content{flex-direction:column}
  /* Su mobile il resizer non ha senso (sidebar overlay) */
  .sidebar-resizer{display:none}

  /* ── PHASE BAR scroll-x se necessario ── */
  .phase-bar{overflow-x:auto;overflow-y:hidden;padding:0 14px;gap:0}
  .phase-tab{padding:0 14px;font-size:11px;white-space:nowrap;flex-shrink:0}
  .progress-info{margin-left:auto;padding:0 8px;flex-shrink:0;font-size:10px}

  /* ── LESSON ── */
  .lesson-header{padding:16px 18px 0}
  .lesson-topic{font-size:17px}
  .lesson-body{padding:16px 18px}
  .lesson-content{padding:18px;font-size:14px;line-height:1.7}
  .lesson-nav{padding:14px 18px;flex-wrap:wrap;gap:10px;justify-content:center}
  .btn{padding:9px 16px;font-size:12px}
  .chunk-counter{font-size:11px;order:3;flex-basis:100%;text-align:center}

  /* ── CHAT ── */
  .chat-window{padding:16px 14px;gap:12px}
  .msg-bubble{max-width:calc(100vw - 80px);padding:11px 14px;font-size:13px}
  .chat-input-bar{padding:12px 14px}

  /* ── QUIZ ── */
  .quiz-area{padding:16px 14px}
  .quiz-card{padding:18px;margin-bottom:12px}
  .quiz-question,.quiz-q{font-size:15px}
  .quiz-opt{padding:10px 12px;font-size:13px}
  .quiz-nav{padding:14px 18px}

  /* ── FINAL SCORE ── */
  .quiz-final{padding:28px 20px}
  .final-score-big{font-size:52px}
  .final-breakdown{gap:20px}
  .final-breakdown-val{font-size:19px}

  /* ── LOGIN ── */
  .login-box{width:100%;max-width:420px;padding:28px 22px;margin:14px;border-radius:14px}
  .login-title{font-size:22px}
  .login-sub{font-size:12px;margin-bottom:22px}
}

@media (max-width: 480px) {
  /* ── TOPBAR minima ── */
  .course-name{display:none}
  .brand{font-size:12px;letter-spacing:.1em}
  .user-pill strong{max-width:80px;overflow:hidden;text-overflow:ellipsis;display:inline-block;vertical-align:bottom}

  /* ── PHASE TAB num-only ── */
  .phase-tab span{display:none}
  .phase-tab{padding:0 10px;gap:0}

  /* ── SIDEBAR full screen su phone ── */
  .sidebar{width:min(88vw, 320px)}

  /* ── BADGE GRID 4 colonne invece di 5 ── */
  .badges-grid{grid-template-columns:repeat(4, 1fr) !important}

  /* ── LESSON ultra-compatta ── */
  .lesson-header{padding:12px 14px 0}
  .lesson-topic{font-size:15px}
  .lesson-body{padding:12px 14px}
  .lesson-content{padding:14px;font-size:13.5px}
  .btn{padding:8px 12px;font-size:11.5px}

  /* ── FINAL SCORE molto stretto ── */
  .final-score-big{font-size:44px}
  .final-btns{flex-direction:column;width:100%}
  .final-btns button{width:100%}
}

/* Orientamento landscape su phone: evita topbar troppo alta */
@media (max-height: 500px) and (orientation: landscape) {
  .topbar{height:44px}
  .phase-bar{height:38px}
  .sidebar{top:44px}
}

/* ═════════════════════════════════════════════════════════════════════════
   WCAG 2.1 AA — Accessibilita'
   - Focus visible su tutto (2.4.7 Level AA)
   - Skip-link per keyboard navigation (2.4.1 Level A)
   - Reduced motion respect (2.3.3 Level AAA)
   ═════════════════════════════════════════════════════════════════════════ */

/* Outline visibile su keyboard focus, invisibile su mouse (UX standard) */
*:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}
*:focus:not(:focus-visible) { outline: none; }

/* Skip link: nascosto finche' non riceve focus, poi top-left */
.skip-link {
  position: absolute;
  top: -40px;
  left: 8px;
  background: var(--accent);
  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);
}

/* Riduce le animazioni se l'utente preferisce */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Screen-reader only: contenuto visibile solo agli AT */
.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;
}

/* ═══════════════════════════════════════════════════════════════════════════
   LEARNING PLATFORM — VISUAL UPGRADE (10 punti + bonus)
   ═══════════════════════════════════════════════════════════════════════════ */

/* Custom CSS variables per accent color personalizzabile per corso. Il JS le
   sovrascrive runtime via document.documentElement.style.setProperty(). */
:root {
  --course-accent:    var(--accent);
  --course-accent-2:  var(--accent2);
  --course-gradient:  linear-gradient(135deg, var(--course-accent) 0%, var(--course-accent-2) 100%);
}

/* ── 1. COVER HEADER + PROGRESS RING ─────────────────────────────────────── */
.course-cover {
  position: relative;
  background: var(--course-gradient);
  border-radius: 14px;
  padding: 16px 22px;
  margin-bottom: 14px;
  color: #fff;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.course-cover::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(ellipse, rgba(255,255,255,0.15), transparent 60%);
  pointer-events: none;
}
.course-cover-img {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  opacity: 0.45;
  z-index: 0;
}
/* Quando c'e' un'immagine, aggiungi gradient overlay scuro per leggibilita' testo */
.course-cover.has-cover .course-cover-img { opacity: 1; }
.course-cover.has-cover::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(15,23,42,0.55) 0%, rgba(15,23,42,0.25) 60%, rgba(15,23,42,0.4) 100%);
  z-index: 0; pointer-events: none;
}
.course-cover-content { position: relative; z-index: 1; }
.course-cover-meta {
  display: flex; gap: 12px; flex-wrap: wrap;
  margin-bottom: 4px; font-size: 11px; opacity: 0.9;
}
.course-cover-meta span { display: inline-flex; align-items: center; gap: 4px; }
.course-cover-title {
  font-family: 'Syne', sans-serif;
  font-size: 20px; font-weight: 800; line-height: 1.15;
  margin-bottom: 2px;
  text-shadow: 0 1px 2px rgba(0,0,0,0.15);
}
.course-cover-desc { font-size: 12px; opacity: 0.92; line-height: 1.45; max-width: 80%; }
/* Hide description by default in compact mode (sidebar already shows course name) */
.course-cover-desc:empty { display: none; }
.progress-ring {
  position: absolute; right: 18px; top: 50%;
  transform: translateY(-50%);
  width: 56px; height: 56px;
}
.progress-ring svg { transform: rotate(-90deg); }
.progress-ring circle.bg { fill: none; stroke: rgba(255,255,255,0.25); stroke-width: 6; }
.progress-ring circle.fg { fill: none; stroke: #fff; stroke-width: 6; stroke-linecap: round; transition: stroke-dashoffset 0.6s ease; }
.progress-ring .pct {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font-family: 'JetBrains Mono', monospace; font-weight: 700; font-size: 18px;
}

/* ── 2. EDITORIAL TYPOGRAPHY ─────────────────────────────────────────────── */
.lesson-content h1 { font-family: 'Syne', sans-serif; font-size: 28px; font-weight: 800; line-height: 1.2; margin: 24px 0 12px; color: var(--course-accent); }
.lesson-content h2 { font-family: 'Syne', sans-serif; font-size: 22px; font-weight: 700; line-height: 1.3; margin: 22px 0 10px; padding-left: 12px; border-left: 3px solid var(--course-accent); }
.lesson-content h3 { font-family: 'Syne', sans-serif; font-size: 17px; font-weight: 600; margin: 18px 0 8px; }
.lesson-content h4 { font-size: 15px; font-weight: 700; margin: 14px 0 6px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; }
.lesson-content > p:first-child::first-letter {
  font-family: 'Syne', sans-serif;
  font-size: 56px; font-weight: 800;
  float: left; line-height: 0.9;
  margin: 6px 8px 0 0;
  color: var(--course-accent);
}
.lesson-content blockquote {
  margin: 16px 0; padding: 12px 18px;
  border-left: 4px solid var(--course-accent);
  background: rgba(37,99,235,0.04);
  font-style: italic; color: var(--text);
}
.pull-quote {
  display: block; float: right; clear: right;
  width: 38%; margin: 8px 0 14px 18px;
  padding: 14px 16px; border-top: 2px solid var(--course-accent); border-bottom: 2px solid var(--course-accent);
  font-family: 'Syne', sans-serif; font-size: 18px; line-height: 1.3; font-weight: 600;
  color: var(--course-accent); text-align: center;
}
@media (max-width: 768px) { .pull-quote { float: none; width: auto; margin: 14px 0; } }

/* Callout box */
.callout {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 14px 16px; margin: 14px 0;
  border-radius: 10px; border-left: 4px solid;
  font-size: 14px; line-height: 1.6;
}
.callout-icon { flex-shrink: 0; font-size: 22px; line-height: 1; }
.callout-body { flex: 1; }
.callout-title { font-weight: 700; margin-bottom: 4px; font-size: 13px; text-transform: uppercase; letter-spacing: 0.05em; }
.callout.tip       { background: rgba(4,120,87,0.06); border-color: var(--success); }
.callout.tip .callout-title { color: var(--success); }
.callout.warn      { background: rgba(217,119,6,0.06); border-color: var(--warn); }
.callout.warn .callout-title { color: var(--warn); }
.callout.note      { background: rgba(37,99,235,0.05); border-color: var(--accent); }
.callout.note .callout-title { color: var(--accent); }
.callout.danger    { background: rgba(220,38,38,0.06); border-color: var(--danger); }
.callout.danger .callout-title { color: var(--danger); }
.callout.law       { background: rgba(100,116,139,0.06); border-color: var(--muted); }
.callout.law .callout-title { color: var(--muted); }

/* Glossary tooltip */
.glossary-term {
  position: relative;
  border-bottom: 1px dashed var(--course-accent);
  cursor: help; color: var(--course-accent);
}
.glossary-term:hover::after {
  content: attr(data-def);
  position: absolute; bottom: calc(100% + 6px); left: 50%;
  transform: translateX(-50%);
  background: var(--text); color: var(--bg);
  padding: 8px 12px; border-radius: 6px;
  font-size: 12px; line-height: 1.5; font-weight: normal;
  white-space: normal; max-width: 280px; min-width: 180px;
  box-shadow: var(--shadow-md);
  z-index: 100;
}

/* ── 3. KEY TAKEAWAYS / MINI-QUIZ / READING TIME ─────────────────────────── */
.reading-time {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 11px; color: var(--muted);
  font-family: 'JetBrains Mono', monospace;
}
.key-takeaways {
  margin: 22px 0 12px; padding: 18px 20px;
  background: linear-gradient(135deg, rgba(37,99,235,0.04), rgba(8,145,178,0.04));
  border: 1px solid rgba(37,99,235,0.15);
  border-radius: 12px;
}
.key-takeaways-title {
  font-family: 'Syne', sans-serif; font-size: 12px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--course-accent); margin-bottom: 10px;
  display: flex; align-items: center; gap: 6px;
}
.key-takeaways ul { padding-left: 0; list-style: none; margin: 0; }
.key-takeaways li {
  position: relative; padding: 6px 0 6px 28px;
  font-size: 13.5px; line-height: 1.55; color: var(--text);
}
.key-takeaways li::before {
  content: ''; position: absolute; left: 0; top: 9px;
  width: 18px; height: 18px;
  background: var(--course-accent);
  border-radius: 50%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3'%3E%3Cpath d='M5 13l4 4L19 7'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: center;
}

.mini-quiz {
  margin: 18px 0; padding: 16px 18px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
}
.mini-quiz-title {
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--course-accent); font-weight: 700; margin-bottom: 8px;
}
.mini-quiz-question { font-size: 14px; font-weight: 600; margin-bottom: 10px; }
.mini-quiz-options { display: flex; flex-direction: column; gap: 6px; }
.mini-quiz-opt {
  padding: 8px 12px; border: 1px solid var(--border); border-radius: 6px;
  background: var(--card); cursor: pointer; font-size: 13px;
  transition: all 0.15s; text-align: left;
}
.mini-quiz-opt:hover { border-color: var(--course-accent); }
.mini-quiz-opt.correct { background: rgba(4,120,87,0.1); border-color: var(--success); color: var(--success); font-weight: 600; }
.mini-quiz-opt.wrong   { background: rgba(220,38,38,0.08); border-color: var(--danger); color: var(--danger); }
.mini-quiz-feedback {
  margin-top: 10px; padding: 8px 12px; border-radius: 6px;
  font-size: 12.5px; line-height: 1.5;
  display: none;
}
.mini-quiz-feedback.show { display: block; }
.mini-quiz-feedback.ok   { background: rgba(4,120,87,0.08); color: var(--success); }
.mini-quiz-feedback.ko   { background: rgba(217,119,6,0.08); color: var(--warn); }

.did-you-know {
  margin: 14px 0; padding: 14px 16px;
  background: rgba(217,119,6,0.05); border: 1px solid rgba(217,119,6,0.2);
  border-radius: 10px; font-size: 13.5px; line-height: 1.6;
  position: relative; padding-left: 50px;
}
.did-you-know::before {
  content: '💡'; position: absolute; left: 14px; top: 14px; font-size: 22px;
}
.did-you-know strong { color: var(--warn); display: block; font-size: 11px; text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 4px; }

/* ── 4. TABLE / CODE BLOCKS / NUMBERED LIST WITH BADGES ─────────────────── */
.lesson-content table {
  width: 100%; border-collapse: collapse; margin: 14px 0;
  background: var(--card); border-radius: 8px; overflow: hidden;
  box-shadow: var(--shadow-sm); font-size: 13px;
}
.lesson-content thead th {
  background: var(--course-accent); color: #fff;
  padding: 10px 14px; text-align: left; font-weight: 600;
  font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em;
}
.lesson-content tbody td { padding: 9px 14px; border-top: 1px solid var(--border); }
.lesson-content tbody tr:nth-child(even) td { background: var(--surface); }

.lesson-content pre {
  background: #1E293B; color: #E8EDF5;
  padding: 14px 16px; border-radius: 8px;
  overflow-x: auto; font-family: 'JetBrains Mono', monospace;
  font-size: 13px; line-height: 1.55; margin: 12px 0;
}
.lesson-content code {
  background: rgba(37,99,235,0.08); color: var(--course-accent);
  padding: 1px 6px; border-radius: 3px;
  font-family: 'JetBrains Mono', monospace; font-size: 0.92em;
}
.lesson-content pre code { background: transparent; padding: 0; color: inherit; font-size: inherit; }

.numbered-list { counter-reset: nl; padding: 0; list-style: none; margin: 12px 0; }
.numbered-list > li {
  counter-increment: nl; position: relative;
  padding: 10px 14px 10px 50px; margin-bottom: 8px;
  background: var(--surface); border-radius: 8px; line-height: 1.5;
}
.numbered-list > li::before {
  content: counter(nl);
  position: absolute; left: 12px; top: 12px;
  width: 26px; height: 26px;
  background: var(--course-gradient); color: #fff;
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-family: 'JetBrains Mono', monospace; font-weight: 700; font-size: 13px;
}

/* Mermaid container */
.mermaid-wrap {
  margin: 18px 0; padding: 16px;
  background: var(--card); border: 1px solid var(--border); border-radius: 10px;
  overflow-x: auto; text-align: center;
}

/* ── 5. MICROINTERACTIONS ─────────────────────────────────────────────────── */
.fade-in-on-scroll { opacity: 0; transform: translateY(12px); transition: opacity 0.5s, transform 0.5s; }
.fade-in-on-scroll.visible { opacity: 1; transform: translateY(0); }

@keyframes pulse-ring {
  0%   { box-shadow: 0 0 0 0 rgba(37,99,235,0.4); }
  70%  { box-shadow: 0 0 0 10px rgba(37,99,235,0); }
  100% { box-shadow: 0 0 0 0 rgba(37,99,235,0); }
}
.pulse-ring { animation: pulse-ring 1.5s infinite; border-radius: 50%; }

@keyframes streak-flame {
  0%, 100% { transform: scale(1) rotate(-3deg); }
  50%      { transform: scale(1.1) rotate(3deg); }
}
.streak-fire { display: inline-block; animation: streak-flame 1.2s ease-in-out infinite; }

@keyframes badge-pop {
  0%   { transform: scale(0); }
  60%  { transform: scale(1.2); }
  100% { transform: scale(1); }
}
.badge-unlock { animation: badge-pop 0.5s cubic-bezier(0.34, 1.56, 0.64, 1); }

.skeleton {
  background: linear-gradient(90deg, var(--border) 0%, rgba(226,232,240,0.5) 50%, var(--border) 100%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.4s infinite;
  border-radius: 4px;
}
@keyframes skeleton-shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* ── 6. GAMIFICATION VISUALS (XP bar) ─────────────────────────────────────── */
.xp-bar {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px;
  background: var(--card); border: 1px solid var(--border); border-radius: 24px;
  font-size: 12px; font-family: 'JetBrains Mono', monospace;
  box-shadow: var(--shadow-sm);
}
.xp-bar-icon { font-size: 18px; }
.xp-bar-fill-wrap { flex: 1; height: 8px; background: var(--surface); border-radius: 4px; overflow: hidden; min-width: 80px; }
.xp-bar-fill { height: 100%; background: var(--course-gradient); transition: width 0.6s ease; box-shadow: 0 0 8px rgba(37,99,235,0.4); }

/* ── 7. STUDY MODES (dark, focus, reader, font slider) ────────────────────── */
body.study-dark {
  --bg: #0F172A; --surface: #1E293B; --card: #1E293B;
  --border: #334155; --text: #F1F5F9; --muted: #94A3B8;
}
body.study-dark .lesson-content pre { background: #0F172A; border: 1px solid #334155; }
body.study-dark .course-cover { box-shadow: 0 4px 18px rgba(0,0,0,0.3); }

/* Focus mode: zen reading: nasconde sidebar + phase-bar per togliere
   distrazioni. Larghezza max generosa (1000px) cosi' su monitor wide
   non c'e' troppo whitespace su Mac/Win 16:9. */
body.study-focus .sidebar,
body.study-focus .phase-bar { display: none !important; }
body.study-focus .main-panel { max-width: 1000px; margin: 0 auto; }

/* Reader mode: font piu' grande e line-height generoso per lettura comoda,
   ma SENZA restringere la card a 720px (l'utente perde > 30% dello spazio
   utile sui monitor desktop). Manteniamo l'experience tipografica. */
body.study-reader .lesson-content {
  font-size: 17px; line-height: 1.95;
}
body.study-reader .lesson-content p { margin-bottom: 14px; }

.study-tools-bar {
  position: fixed; right: 18px; bottom: 18px;
  display: flex; flex-direction: column; gap: 6px; z-index: 80;
}
.study-tools-bar button {
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--card); border: 1px solid var(--border);
  cursor: pointer; font-size: 16px; box-shadow: var(--shadow-sm);
  display: flex; align-items: center; justify-content: center;
  transition: all 0.15s;
}
.study-tools-bar button:hover { transform: translateY(-2px); border-color: var(--course-accent); }
.study-tools-bar button.active { background: var(--course-accent); color: #fff; border-color: var(--course-accent); }

/* ── 8. FLASHCARDS ────────────────────────────────────────────────────────── */
.flashcard-deck {
  margin: 18px 0; padding: 16px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
}
.flashcard {
  perspective: 1000px;
  width: 100%; height: 200px;
  margin: 12px 0;
  cursor: pointer;
}
.flashcard-inner {
  position: relative; width: 100%; height: 100%;
  transition: transform 0.6s; transform-style: preserve-3d;
}
.flashcard.flipped .flashcard-inner { transform: rotateY(180deg); }
.flashcard-face {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  padding: 20px; border-radius: 12px;
  backface-visibility: hidden;
  font-size: 16px; line-height: 1.5; text-align: center;
  box-shadow: var(--shadow-md);
}
.flashcard-face.front { background: var(--course-gradient); color: #fff; font-weight: 600; }
.flashcard-face.back  { background: var(--card); border: 1px solid var(--border); transform: rotateY(180deg); }

/* ── 9. MULTIMEDIA (lightbox image, audio styled) ─────────────────────────── */
.lightbox {
  position: fixed; inset: 0; background: rgba(15,23,42,0.85); z-index: 9999;
  display: none; align-items: center; justify-content: center; padding: 20px;
  cursor: zoom-out;
}
.lightbox.open { display: flex; }
.lightbox img { max-width: 95%; max-height: 95%; border-radius: 8px; }
.lesson-content img.zoomable { cursor: zoom-in; transition: transform 0.2s; }
.lesson-content img.zoomable:hover { transform: scale(1.02); }

audio { width: 100%; margin: 12px 0; }
audio::-webkit-media-controls-panel { background: var(--surface); }

/* ── 10. AI COVER GENERATED ───────────────────────────────────────────────── */
.cover-generating {
  display: flex; align-items: center; justify-content: center;
  height: 200px; border-radius: 12px;
  background: var(--course-gradient);
  color: #fff;
  flex-direction: column; gap: 10px;
}
.cover-generating .spinner-light {
  width: 32px; height: 32px;
  border: 3px solid rgba(255,255,255,0.3); border-top-color: #fff;
  border-radius: 50%; animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Confetti container */
#confetti-canvas { position: fixed; inset: 0; pointer-events: none; z-index: 9999; }

/* ═══════════════════════════════════════════════════════════════════
   SLIDE LAYOUTS — libreria layout per lezione (immagine + testo)
   Il layout è scelto per lezione (rawChunk.layout o euristica pickLayout).
   Grid a 2 colonne che collassa a 1 su mobile; media con cornice coerente.
   ═══════════════════════════════════════════════════════════════════ */
.slide{ display:block; }
.slide__body{ min-width:0; }
.slide__media{ min-width:0; }
.slide__media img{ width:100%; height:auto; display:block; border-radius:12px;
  border:1px solid var(--border); background:#0e1520; object-fit:cover; }
.slide__media .cap{ font-size:11px; color:var(--muted); margin-top:6px; text-align:center; }

/* etichetta piccola sopra la slide (tipo layout) */
.slide__kicker{ font-size:11px; text-transform:uppercase; letter-spacing:.12em;
  font-weight:700; color:var(--course-accent,var(--accent)); margin-bottom:10px; opacity:.9; }

/* --- 2 colonne: immagine a destra / a sinistra --- */
.slide--image-right, .slide--image-left, .slide--feature, .slide--split, .slide--diagram{
  display:grid; grid-template-columns:1fr 1fr; gap:26px; align-items:start; }
.slide--image-right .slide__media{ order:2; }
.slide--image-left  .slide__media{ order:0; }
.slide--feature{ grid-template-columns:1.15fr .85fr; }
.slide--feature .slide__media{ order:2; }
.slide--split{ grid-template-columns:1fr 1fr; }
.slide--split .slide__media{ order:2; }
.slide--image-right .slide__media img, .slide--image-left .slide__media img,
.slide--feature .slide__media img, .slide--split .slide__media img{ position:sticky; top:12px; }

/* --- hero: immagine larga in alto, testo sotto --- */
.slide--hero .slide__media{ margin-bottom:20px; }
.slide--hero .slide__media img{ max-height:300px; }

/* --- band: fascia immagine a tutta larghezza (fra kicker e testo) --- */
.slide--band .slide__media{ margin:4px 0 20px; }
.slide--band .slide__media img{ max-height:220px; border-radius:14px; }

/* --- cover: copertina modulo, immagine grande + titolo forte --- */
.slide--cover .slide__media{ margin-bottom:18px; }
.slide--cover .slide__media img{ max-height:340px; border-radius:16px; }
.slide--cover .slide__body h1, .slide--cover .slide__body h2, .slide--cover .slide__body h3{
  font-size:1.7em; line-height:1.2; }

/* --- diagram: come image-right ma cornice “schema” --- */
.slide--diagram .slide__media img{ background:var(--card); object-fit:contain; padding:8px; }

/* --- callout: nessuna immagine, contenuto in card con barra accento --- */
.slide--callout .slide__body, .slide--quote .slide__body{
  background:var(--card); border:1px solid var(--border); border-left:4px solid var(--course-accent,var(--accent));
  border-radius:12px; padding:18px 22px; }
.slide--quote .slide__body{ font-size:1.12em; line-height:1.7; font-style:italic; position:relative; }
.slide--quote .slide__body::before{ content:'“'; font-size:3em; line-height:0; color:var(--course-accent,var(--accent));
  opacity:.35; position:absolute; left:10px; top:22px; }
.slide--quote .slide__body > *{ position:relative; }

/* --- stat: numero/enfasi (barra accento marcata) --- */
.slide--stat .slide__body{ border-left:4px solid var(--course-accent,var(--accent)); padding-left:18px; }

/* --- steps: primo elenco reso come passi numerati marcati --- */
.slide--steps .slide__body ol, .slide--steps .slide__body ul{ counter-reset:st; list-style:none; padding-left:0; }
.slide--steps .slide__body ol > li, .slide--steps .slide__body ul > li{
  counter-increment:st; position:relative; padding:4px 0 10px 44px; margin:0; }
.slide--steps .slide__body ol > li::before, .slide--steps .slide__body ul > li::before{
  content:counter(st); position:absolute; left:0; top:2px; width:28px; height:28px; border-radius:50%;
  background:var(--course-accent,var(--accent)); color:#06222b; font-weight:800; font-size:13px;
  display:flex; align-items:center; justify-content:center; }

/* --- two-col: testo su due colonne (denso) --- */
.slide--two-col .slide__media{ margin-bottom:16px; }
.slide--two-col .slide__media img{ max-height:200px; }
.slide--two-col .slide__body{ columns:2; column-gap:28px; }
.slide--two-col .slide__body h1, .slide--two-col .slide__body h2, .slide--two-col .slide__body h3{ column-span:all; }

/* --- responsive: sotto 760px tutte le griglie collassano --- */
@media (max-width:760px){
  .slide--image-right, .slide--image-left, .slide--feature, .slide--split, .slide--diagram{
    grid-template-columns:1fr; }
  .slide--image-right .slide__media, .slide--feature .slide__media, .slide--split .slide__media{ order:0; }
  .slide--image-right .slide__media img, .slide--image-left .slide__media img,
  .slide--feature .slide__media img, .slide--split .slide__media img{ position:static; margin-bottom:16px; }
  .slide--two-col .slide__body{ columns:1; }
}

/* ── TEMA SAPIA ACADEMY ─────────────────────────────────────────────────────
 * Palette dal logo: notte (testo, superfici scure), indaco (link, stati attivi),
 * scintilla (call to action), salvia (successo), carta (sfondo caldo).
 * Le CTA sono ambra con testo notte: è il tratto che distingue Sapia da FormaIA. */
:root {
  --notte: #26215C; --indaco: #534AB7; --lavanda: #7F77DD; --lavanda-50: #EEEDFE;
  --scintilla: #EF9F27; --scintilla-hover: #DB8B14; --scintilla-50: #FDF1DC; --on-scintilla: #26215C;
  --salvia: #1D9E75; --salvia-50: #E1F5EE;
  --bg: #F7F6F2; --surface: #FFFFFF; --card: #FFFFFF; --border: #E3E0D6;
  --accent: #534AB7; --accent-hover: #3C3489; --accent2: #EF9F27;
  --success: #1D9E75; --warn: #BA7517; --danger: #C2412D;
  --text: #26215C; --muted: #6B687A;
  --phase1: #534AB7; --phase2: #1D9E75; --phase3: #EF9F27;
  --course-accent-2: #26215C;
  --shadow-sm: 0 1px 2px rgba(38,33,92,0.06);
  --shadow-md: 0 4px 12px rgba(38,33,92,0.09);
  --shadow-lg: 0 10px 30px rgba(38,33,92,0.14);
}
.login-btn, .btn-primary, .final-btns .btn-primary, .btn-quiz-next {
  background: var(--scintilla); color: var(--on-scintilla);
}
.login-btn:hover, .btn-primary:hover, .final-btns .btn-primary:hover, .btn-quiz-next:hover {
  background: var(--scintilla-hover); color: var(--on-scintilla);
}
.login-logo span { background: var(--scintilla); box-shadow: 0 0 8px var(--scintilla); }
.toc-item.active .toc-dot { background: var(--scintilla); box-shadow: 0 0 8px var(--scintilla); }
body.study-dark {
  --bg: #14112E; --surface: #1F1A45; --card: #1F1A45;
  --border: #322B6B; --text: #F1EFFA; --muted: #AFA9EC;
}
body.study-dark .lesson-content pre { background: #14112E; border-color: #322B6B; }