:root{
  --bg-base:#0A0A0F;--bg-surface:#141419;--bg-elevated:#1E1E26;--border:#2A2A35;
  --text-primary:#F5F5F7;--text-secondary:#9A9AA8;--text-disabled:#5C5C68;
  --accent:#7C5CFF;--success:#00E5A0;--danger:#FF4D6D;--warning:#FFB800;--info:#00C2FF;
  --font-hero:'Space Grotesk','Inter Tight',system-ui,sans-serif;
  --font-body:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;
  --font-mono:'JetBrains Mono',ui-monospace,monospace;
}
*{box-sizing:border-box}
html{color-scheme:dark}
body{margin:0;background:var(--bg-base);color:var(--text-primary);font:400 16px/1.55 var(--font-body)}
a{color:var(--info);text-decoration:none}
h1,h2,h3{font-family:var(--font-hero);font-weight:600;margin:0;letter-spacing:-.01em}
button,input,textarea,select{font:inherit;color:inherit}

.topbar{display:flex;align-items:center;gap:16px;padding:14px 28px;border-bottom:1px solid var(--border);background:var(--bg-base);position:sticky;top:0;z-index:20}
.brand{font-family:var(--font-hero);font-weight:700;font-size:20px;color:var(--text-primary)}
.brand span{color:var(--accent)}
.spacer{flex:1}
.wrap{max-width:1200px;margin:0 auto;padding:40px 28px}

.btn{background:var(--accent);color:#fff;border:1px solid var(--accent);border-radius:6px;padding:9px 16px;font-size:14px;font-weight:500;cursor:pointer;transition:filter .15s ease-out}
.btn:hover{filter:brightness(1.12)}
.btn:disabled{opacity:.5;cursor:default}
.btn.secondary{background:var(--bg-surface);border-color:var(--border);color:var(--text-primary)}
.btn.secondary:hover{background:var(--bg-elevated);filter:none}
.btn.danger{background:transparent;border-color:var(--danger);color:var(--danger)}
.btn.small{padding:5px 10px;font-size:13px}

.card{background:var(--bg-surface);border:1px solid var(--border);border-radius:8px}
input[type=text],input[type=password],textarea,select{width:100%;background:var(--bg-base);border:1px solid var(--border);border-radius:8px;padding:10px 12px;font-size:14px;transition:border-color .15s}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--accent)}
textarea{resize:vertical;min-height:70px}
label{display:block;font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--text-secondary);margin:14px 0 6px}

.badge{display:inline-block;padding:2px 9px;border-radius:6px;font-size:12px;font-weight:500;border:1px solid;font-family:var(--font-body)}
.badge.ok{background:#00E5A026;color:var(--success);border-color:var(--success)}
.badge.warn{background:#FFB80026;color:var(--warning);border-color:var(--warning)}
.badge.err{background:#FF4D6D26;color:var(--danger);border-color:var(--danger)}
.badge.info{background:#00C2FF26;color:var(--info);border-color:var(--info)}
.muted{color:var(--text-secondary)}
.mono{font-family:var(--font-mono)}
.hidden{display:none!important}

/* elenco guide */
.hero h1{font-size:56px;line-height:1.05}
.hero p{color:var(--text-secondary);font-size:20px;margin:12px 0 0;max-width:640px}
.toolbar{display:flex;gap:12px;margin:32px 0 20px;align-items:center}
.toolbar input{max-width:360px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.gcard{padding:20px;cursor:pointer;transition:background .15s ease-out;display:block;color:inherit}
.gcard:hover{background:var(--bg-elevated)}
.gcard h3{font-size:20px;margin:8px 0 6px}
.gcard .meta{font-size:13px;color:var(--text-secondary);display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.bar{height:6px;background:var(--bg-base);border-radius:4px;margin-top:12px;overflow:hidden}
.bar i{display:block;height:100%;background:var(--accent);transition:width .4s}

.modal-bg{position:fixed;inset:0;background:#0A0A0Fcc;display:flex;align-items:center;justify-content:center;z-index:50;padding:20px}
.modal{background:var(--bg-elevated);border:1px solid var(--border);border-radius:8px;padding:28px;width:100%;max-width:480px}
.modal h2{font-size:28px;margin-bottom:6px}
.row{display:flex;gap:10px;margin-top:20px;justify-content:flex-end}

/* pagina guida */
.layout{display:grid;grid-template-columns:minmax(320px,5fr) 7fr;gap:32px;align-items:start;max-width:1500px;margin:0 auto;padding:28px}
.vcol{position:sticky;top:76px}
.vcol video{width:100%;border-radius:8px;background:#000;border:1px solid var(--border);display:block}
.vcol .vinfo{padding:16px 2px}
.vcol h1{font-size:40px;line-height:1.1}
.sumcard{padding:16px 18px;margin-top:14px}
.sumcard ul{margin:6px 0 0;padding-left:20px;color:var(--text-secondary)}
.toc{margin-top:14px;max-height:30vh;overflow:auto}
.toc a{display:flex;gap:10px;padding:6px 10px;border-radius:6px;color:var(--text-secondary);font-size:14px;cursor:pointer}
.toc a:hover,.toc a.on{background:var(--bg-elevated);color:var(--text-primary)}
.toc a b{font-family:var(--font-mono);color:var(--accent);min-width:22px}

.step{padding:22px;margin-bottom:20px;scroll-margin-top:84px;transition:border-color .2s}
.step.on{border-color:var(--accent)}
.shead{display:flex;gap:14px;align-items:flex-start}
.num{flex:none;width:36px;height:36px;border-radius:50%;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-family:var(--font-hero);font-weight:700;font-size:16px}
.shead h2{font-size:24px;line-height:1.2}
.shead .t{margin-left:auto;flex:none}
.tbtn{background:var(--bg-base);border:1px solid var(--border);border-radius:6px;padding:3px 9px;font-family:var(--font-mono);font-size:12px;color:var(--info);cursor:pointer}
.tbtn:hover{background:var(--bg-elevated)}
.desc{margin:12px 0 0 50px;color:var(--text-primary)}
.warn-box{margin:12px 0 0 50px;padding:10px 14px;border-radius:8px;background:#FFB80019;border:1px solid var(--warning);color:var(--warning);font-size:14px}
.shot{position:relative;margin:16px 0 0 50px;border-radius:8px;overflow:hidden;border:1px solid var(--border);line-height:0}
.shot img{width:100%;display:block}
.shot svg{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.shot.draw{cursor:crosshair;outline:2px dashed var(--warning)}
.shot.draw svg{pointer-events:none}
.edit-fields{margin:14px 0 0 50px}
.edit-actions{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0 0 50px}
.savebar{position:fixed;bottom:0;left:0;right:0;background:var(--bg-elevated);border-top:1px solid var(--border);padding:12px 28px;display:flex;gap:10px;align-items:center;z-index:30}
.toast{position:fixed;bottom:80px;left:50%;transform:translateX(-50%);background:var(--bg-elevated);border:1px solid var(--border);padding:10px 18px;border-radius:8px;z-index:60}

@media(max-width:900px){
  .layout{grid-template-columns:1fr;padding:0 0 28px;gap:0}
  .vcol{top:56px;z-index:10;background:var(--bg-base);padding:8px 12px 0}
  .vcol .vinfo,.vcol .sumcard,.toc{display:none}
  .steps{padding:16px 16px 0}
  .desc,.warn-box,.shot,.edit-fields,.edit-actions{margin-left:0}
  .hero h1{font-size:40px}
  .wrap{padding:24px 16px}
  .topbar{padding:12px 16px}
}

/* popup immagine */
.shot img{cursor:zoom-in}
.shot.draw img{cursor:crosshair}
.lb{position:fixed;inset:0;background:#0A0A0Fe6;z-index:100;display:flex;flex-direction:column}
.lb-top{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 20px;font-family:var(--font-hero);font-size:18px}
.lb-top b{color:var(--accent)}
.lb-body{flex:1;display:flex;align-items:center;justify-content:center;padding:0 64px 24px;min-height:0}
.lb .shot{margin:0;display:inline-block;max-width:100%;max-height:100%;cursor:default}
.lb .shot img{width:auto;max-width:100%;max-height:calc(100vh - 110px);cursor:default}
.lb-nav{position:absolute;top:50%;transform:translateY(-50%);width:44px;height:44px;border-radius:50%;border:1px solid var(--border);background:var(--bg-elevated);color:var(--text-primary);font-size:26px;line-height:1;cursor:pointer}
.lb-nav:hover{background:var(--accent)}
.lb-nav.l{left:12px}.lb-nav.r{right:12px}
@media(max-width:900px){.lb-body{padding:0 8px 16px}.lb-nav{display:none}}

/* desktop: due metà con scroll indipendente (video+info a sinistra, passi a destra) */
@media(min-width:901px){
  html,body{height:100%;overflow:hidden}
  .layout{height:calc(100vh - var(--top,62px));padding:20px 28px;align-items:stretch;overflow:hidden}
  body.editing .layout{height:calc(100vh - var(--top,62px) - 62px)}
  .vcol,.steps{min-height:0;height:100%;overflow-y:auto;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:var(--border) transparent}
  .vcol{position:static;padding-right:12px}
  .steps{padding-right:12px}
  .step{scroll-margin-top:0}
  .toc{max-height:none;overflow:visible}
}