/* ============================================================
   CARL document frame — navy shell + warm-white PDF canvas.
   Renders a worksheet / facilitator-guide pair as embedded,
   scrollable PDFs (PDF.js). Empty "coming soon" state until
   real PDF URLs are wired in. Shortcode: [carl_docframe]
   ============================================================ */
.carl-docframe{
  --cdf-navy:#002D4C; --cdf-navy-deep:#001930; --cdf-blue:#59C9E1;
  --cdf-teal:#00E5D3; --cdf-lime:#A8E063; --cdf-soft:#FAFBFA;
  --cdf-meta:#8B95A0; --cdf-h:440px;
  --cdf-ease:cubic-bezier(0.16,1,0.3,1);
  background:var(--cdf-navy-deep); border-radius:22px; padding:9px;
  box-shadow:0 14px 44px rgba(0,25,48,.28); overflow:hidden;
  font-family:'Poppins',system-ui,-apple-system,sans-serif;
  transition:transform .55s var(--cdf-ease),box-shadow .55s var(--cdf-ease);
}
.carl-docframe:hover{transform:translateY(-2px);box-shadow:0 18px 52px rgba(0,25,48,.34)}

/* title bar on the navy shell */
.carl-docframe__bar{display:flex;align-items:center;justify-content:space-between;
  gap:12px;padding:6px 8px 12px;flex-wrap:wrap}
.carl-docframe__title{display:flex;align-items:center;gap:10px;min-width:0}
.carl-docframe__icon{width:30px;height:30px;border-radius:8px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--cdf-blue),var(--cdf-teal));
  display:flex;align-items:center;justify-content:center}
.carl-docframe__name{font-weight:700;color:#fff;font-size:14.5px;line-height:1.2;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.carl-docframe__name span{display:block;font-weight:500;color:#9db4c4;font-size:12px}

.carl-docframe__toggle{display:flex;background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.14);border-radius:999px;padding:3px;flex:0 0 auto}
.carl-docframe__toggle button{border:0;background:transparent;font-family:inherit;
  font-weight:700;font-size:12.5px;color:#c5d4de;padding:6px 14px;border-radius:999px;
  cursor:pointer;transition:background .35s var(--cdf-ease),color .35s var(--cdf-ease)}
.carl-docframe__toggle button.on{background:#fff;color:var(--cdf-navy-deep);
  box-shadow:inset 3px 0 0 var(--cdf-lime)}
.carl-docframe__toggle button:focus-visible{outline:2px solid var(--cdf-blue);outline-offset:2px}
/* single-document frame: no toggle */
.carl-docframe--single .carl-docframe__toggle{display:none}

/* warm-white canvas inset */
.carl-docframe__canvas{background:var(--cdf-soft);border-radius:14px;overflow:hidden}
.carl-docframe__scroll{height:var(--cdf-h);overflow-y:auto;background:#eef1f4;
  scrollbar-width:thin;display:block}
.carl-docframe__scroll::-webkit-scrollbar{width:9px}
.carl-docframe__scroll::-webkit-scrollbar-thumb{background:#c7d0d8;border-radius:6px;
  border:2px solid #eef1f4}

/* rendered PDF pages */
.carl-docframe__page{display:block;margin:16px auto;max-width:90%;height:auto;
  background:#fff;box-shadow:0 2px 12px rgba(0,45,76,.12);border-radius:4px}
.carl-docframe__loading,.carl-docframe__error{padding:40px 24px;text-align:center;
  color:#5A6C7D;font-size:13px}
.carl-docframe__error a{color:#0A6C83;font-weight:700}

/* empty "coming soon" state — reads as an intentional document placeholder */
.carl-docframe__empty{height:var(--cdf-h);display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:13px;text-align:center;padding:32px 28px;
  color:#8593a1;background:radial-gradient(130% 100% at 50% -12%,#ffffff 0%,#eef2f7 100%)}
.carl-docframe__empty-ic{width:58px;height:58px;border-radius:15px;background:#fff;
  box-shadow:0 8px 22px rgba(0,45,76,.09),0 1px 0 rgba(255,255,255,.9) inset;
  display:flex;align-items:center;justify-content:center;flex:0 0 auto}
.carl-docframe__empty-ic svg{width:30px;height:30px;stroke:#59C9E1;opacity:1}
.carl-docframe__empty-title{margin:4px 0 0;font-weight:700;font-size:15.5px;color:#43566a}
.carl-docframe__empty-sub{margin:0;font-size:12.5px;max-width:290px;line-height:1.55;color:#8593a1}

/* expand cue on the navy shell */
.carl-docframe__cue{display:flex;align-items:center;justify-content:flex-end;gap:6px;
  width:100%;padding:8px 6px 2px;background:transparent;border:0;font-family:inherit;
  color:#9db4c4;font-weight:700;font-size:12px;cursor:pointer;
  transition:color .35s var(--cdf-ease)}
.carl-docframe__cue:hover{color:var(--cdf-blue)}
.carl-docframe__cue svg{transition:transform .35s var(--cdf-ease)}
.carl-docframe__cue:hover svg{transform:scale(1.12)}
.carl-docframe__cue[hidden]{display:none}

/* ---- lightbox overlay (one shared node, appended to <body> by JS) ---- */
.carl-docframe-lb{position:fixed;inset:0;z-index:9999;display:flex;flex-direction:column;
  background:rgba(0,15,28,.86);backdrop-filter:blur(3px);
  opacity:0;visibility:hidden;transition:opacity .4s var(--cdf-ease,cubic-bezier(0.16,1,0.3,1)),visibility .4s}
.carl-docframe-lb.open{opacity:1;visibility:visible}
.carl-docframe-lb__top{display:flex;align-items:center;justify-content:space-between;
  gap:14px;padding:14px 18px;color:#fff;font-family:'Poppins',system-ui,sans-serif}
.carl-docframe-lb__name{font-weight:700;font-size:15px;min-width:0;overflow:hidden;
  text-overflow:ellipsis;white-space:nowrap}
.carl-docframe-lb__actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.carl-docframe-lb__dl{display:inline-flex;align-items:center;gap:7px;text-decoration:none;
  font-family:'Poppins',sans-serif;font-weight:700;font-size:13px;color:#002D4C;
  background:#fff;border-radius:999px;padding:9px 15px}
.carl-docframe-lb__dl svg{width:15px;height:15px}
.carl-docframe-lb__close{width:40px;height:40px;border-radius:999px;border:1px solid rgba(255,255,255,.28);
  background:rgba(255,255,255,.08);color:#fff;cursor:pointer;display:flex;
  align-items:center;justify-content:center;transition:background .3s ease}
.carl-docframe-lb__close:hover{background:rgba(255,255,255,.18)}
.carl-docframe-lb__body{flex:1;overflow-y:auto;padding:0 16px 40px;-webkit-overflow-scrolling:touch}
.carl-docframe-lb__doc{max-width:900px;margin:0 auto}
.carl-docframe-lb__doc canvas{display:block;margin:16px auto;width:100%;max-width:820px;
  height:auto;background:#fff;box-shadow:0 8px 30px rgba(0,0,0,.35);border-radius:3px}
body.carl-docframe-lb-open{overflow:hidden}

/* responsive */
@media(max-width:600px){
  .carl-docframe__bar{gap:8px}
  .carl-docframe__name{font-size:13.5px}
  .carl-docframe__toggle button{padding:6px 11px;font-size:12px}
  .carl-docframe-lb__dl span{display:none}
}

/* reduced motion */
@media(prefers-reduced-motion:reduce){
  .carl-docframe,.carl-docframe:hover{transition:none;transform:none}
  .carl-docframe__cue svg,.carl-docframe__toggle button{transition:none}
  .carl-docframe-lb{transition:opacity .001s}
}