:root{
  --lime:#B8DD3C; --lime-dark:#7DA319; --lime-deep:#5F7E15;
  --lime-soft:#EEF6CC; --lime-tint:#F7FBE6;
  --amber:#F7A400; --amber-soft:#FFEFCC;
  --red:#D7263D; --red-soft:#FBE3E6;
  --green:#2E933C; --green-soft:#D9F0DC;
  --yellow-green:#A8C400; --yellow-green-soft:#F0F6CB;
  --ink:#1A1A1A; --ink-mid:#4A4540; --ink-light:#8A837A;
  --border:#E8E4DC; --cream:#FAF8F4; --paper:#FFFFFF;
  --shadow:0 4px 16px rgba(0,0,0,.05);
  --shadow-lg:0 12px 40px rgba(0,0,0,.08);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{
  font-family:'DM Sans',sans-serif;
  background:var(--cream);
  color:var(--ink);
  line-height:1.55;
  font-size:14px;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit}

/* ═══ TEACHER BAR (dark, top — adapted for training with SESSION pill) ═══ */
.teacher-bar{
  background:#1A1210;color:#fff;padding:8px 22px;
  display:flex;align-items:center;justify-content:space-between;
  gap:12px;font-size:11.5px;flex-wrap:wrap
}
.teacher-bar-label{
  display:flex;align-items:center;gap:8px;
  color:rgba(255,255,255,.55);font-weight:500;letter-spacing:.3px
}
.teacher-bar-label::before{
  content:'SESSION';
  background:var(--lime);color:#1A1210;
  font-weight:700;padding:2px 8px;border-radius:50px;
  font-size:9.5px;letter-spacing:1.2px
}
.tb-session{
  display:inline-flex;gap:14px;align-items:center;color:rgba(255,255,255,.72);
  flex-wrap:wrap
}
.tb-session .tb-piece{display:inline-flex;gap:6px;align-items:center;font-size:11px}
.tb-session .tb-piece .lbl{
  color:rgba(255,255,255,.4);font-size:9.5px;font-weight:700;
  letter-spacing:1.2px;text-transform:uppercase
}
.tb-session .tb-piece .code{
  background:rgba(255,255,255,.08);padding:2px 8px;border-radius:6px;
  font-weight:700;letter-spacing:1px;font-size:11px;color:#fff
}
.tb-session .tb-piece .name{color:#fff;font-weight:700}
.tb-session .tb-piece .animal{color:rgba(255,255,255,.55);font-style:italic;font-size:10.5px}
.tb-save{color:rgba(255,255,255,.4);font-style:italic;font-size:10.5px;letter-spacing:.3px}
.tb-save.saved{color:var(--lime)}
.tb-leave{
  background:transparent;border:1px solid rgba(255,255,255,.2);
  color:rgba(255,255,255,.65);padding:4px 12px;border-radius:50px;
  font-family:inherit;font-size:10.5px;font-weight:600;cursor:pointer;letter-spacing:.3px;transition:all .18s
}
.tb-leave:hover{color:#fff;border-color:rgba(255,255,255,.5)}

/* ═══ BRAND BAR (white, sticky) ═══ */
.brand-bar{
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 22px;background:#fff;border-bottom:1px solid var(--border);
  position:sticky;top:0;z-index:5
}
.brand-bar .logo{
  font-family:'Century Gothic','Jost',Futura,'Trebuchet MS',sans-serif;font-weight:900;font-size:17px;
  letter-spacing:-.3px;color:var(--ink);text-decoration:none
}
.brand-bar .logo em{color:var(--lime-dark);font-style:italic}
.brand-bar-right{display:flex;align-items:center;gap:16px}
.brand-bar .back-link{font-size:11px;color:var(--ink-light);text-decoration:none;letter-spacing:.4px}
.brand-bar .back-link:hover{color:var(--ink)}
.brand-bar .demo-tag{
  font-size:11px;font-weight:700;letter-spacing:1.5px;
  text-transform:uppercase;color:var(--ink-light)
}
.brand-bar .demo-tag .dot{
  display:inline-block;width:6px;height:6px;border-radius:50%;
  background:var(--lime);margin-right:7px;vertical-align:middle
}

/* ═══ SHELL (2-col — passage left, interactive right) ═══ */
.shell{
  display:grid;grid-template-columns:1fr 1fr;gap:0;
  min-height:calc(100vh - 76px);max-width:1400px;margin:0 auto
}
@media(max-width:880px){.shell{grid-template-columns:1fr}}

/* LEFT: passage */
.passage-pane{
  background:var(--paper);padding:28px 28px 60px;
  border-right:1px solid var(--border);
  overflow-y:auto;max-height:calc(100vh - 76px)
}
@media(max-width:880px){
  .passage-pane{max-height:none;border-right:none;border-bottom:1px solid var(--border)}
}
.passage-genre{
  display:inline-block;font-size:10px;font-weight:700;letter-spacing:1.8px;
  text-transform:uppercase;color:var(--lime-deep);
  background:var(--lime-tint);padding:4px 10px;border-radius:50px;margin-bottom:14px
}
.passage-title{
  font-family:'Fraunces',serif;font-weight:900;font-size:24px;
  letter-spacing:-.5px;line-height:1.1;margin-bottom:6px;color:var(--ink)
}
.passage-byline{font-size:11.5px;color:var(--ink-light);letter-spacing:.4px;margin-bottom:16px;font-weight:500}
.passage-body{font-size:14.5px;line-height:1.7;color:var(--ink-mid)}
.passage-body p{margin-bottom:14px}
.passage-body p .pnum{font-size:9px;color:var(--ink-light);letter-spacing:1.4px;font-weight:700;vertical-align:super;margin-right:4px}
.passage-body p:last-child{margin-bottom:0}

/* RIGHT: interactive */
.right-pane{
  padding:28px 28px 60px;overflow-y:auto;
  max-height:calc(100vh - 76px)
}
@media(max-width:880px){.right-pane{max-height:none}}

/* Single-pane (activities without side passage — used for Guess the Prompt) */
.single-pane{max-width:820px;margin:0 auto;padding:32px 28px 60px}

/* ═══ COMMON RIGHT-PANE ELEMENTS ═══ */
.phase-pill{
  display:inline-block;font-size:10px;font-weight:700;letter-spacing:1.8px;
  text-transform:uppercase;color:var(--ink-light);
  background:#fff;border:1px solid var(--border);
  padding:5px 11px;border-radius:50px;margin-bottom:14px
}
.phase-title{
  font-family:'Century Gothic','Jost',Futura,'Trebuchet MS',sans-serif;font-weight:900;font-size:22px;
  letter-spacing:-.4px;line-height:1.15;margin-bottom:8px;color:var(--ink)
}
.phase-title em{color:var(--lime-dark);font-style:italic}
.phase-sub{font-size:13.5px;color:var(--ink-mid);margin-bottom:20px;line-height:1.55}

/* ═══ CARDS ═══ */
.card{
  background:#fff;border:1px solid var(--border);border-radius:14px;
  padding:18px;box-shadow:var(--shadow);margin-bottom:14px
}
.card-label{
  font-size:11px;font-weight:700;letter-spacing:1.5px;
  text-transform:uppercase;color:var(--ink-light);margin-bottom:8px
}

/* ═══ FIELDS ═══ */
.field{margin-bottom:14px}
.field label{display:block;font-size:12px;font-weight:700;color:var(--ink-mid);margin-bottom:6px;letter-spacing:.3px}
.field input,.field textarea,.field select{
  width:100%;padding:10px 12px;border:1.5px solid var(--border);
  border-radius:8px;font-size:13.5px;font-family:inherit;
  background:#fff;color:var(--ink);transition:border-color .15s
}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--lime-dark)}
.field textarea{min-height:72px;resize:vertical;line-height:1.5}

/* ═══ BUTTONS ═══ */
.btn{
  display:inline-block;background:var(--ink);color:#fff;border:none;
  padding:10px 22px;border-radius:50px;font-size:13px;font-weight:700;
  cursor:pointer;font-family:inherit;transition:all .15s;
  text-decoration:none;letter-spacing:.2px
}
.btn:hover{background:var(--lime-dark);transform:translateY(-1px)}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.btn-ghost{background:transparent;color:var(--ink-mid);border:1.5px solid var(--border);padding:9px 18px}
.btn-ghost:hover{background:#fff;border-color:var(--ink);color:var(--ink)}
.btn-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}

/* ═══ PROMPT CARD (black-ribboned) ═══ */
.prompt-card-top{
  background:#fff;border:2px solid var(--ink);
  border-radius:12px;padding:0;margin-bottom:22px;
  overflow:hidden;box-shadow:0 4px 14px rgba(0,0,0,.06)
}
.prompt-card-top .pc-ribbon{
  background:var(--ink);color:var(--lime);
  padding:7px 16px;font-size:10.5px;font-weight:700;
  letter-spacing:2px;text-transform:uppercase
}
.prompt-card-top .pc-text{
  font-family:'Fraunces',serif;font-weight:400;font-size:15.5px;
  line-height:1.55;color:var(--ink);padding:14px 16px
}
.prompt-card-top .pc-text em{font-style:italic;color:var(--lime-dark);font-weight:700}

/* ═══ TIER FEEDBACK ═══ */
.tier-feedback{border-radius:12px;padding:16px;margin-top:12px;border:1.5px solid;font-size:13.5px;line-height:1.55}
.tier-feedback.red{background:var(--red-soft);border-color:var(--red);color:#8B1A2A}
.tier-feedback.amber{background:var(--amber-soft);border-color:var(--amber);color:#6B4500}
.tier-feedback.yellow-green{background:var(--yellow-green-soft);border-color:var(--yellow-green);color:#5A6B10}
.tier-feedback.green{background:var(--green-soft);border-color:var(--green);color:#1F5A26}
.tier-feedback-header{display:flex;align-items:center;gap:9px;margin-bottom:8px}
.tier-icon{width:24px;height:24px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-weight:900;color:#fff;flex-shrink:0}
.tier-feedback.red .tier-icon{background:var(--red)}
.tier-feedback.amber .tier-icon{background:var(--amber)}
.tier-feedback.yellow-green .tier-icon{background:var(--yellow-green)}
.tier-feedback.green .tier-icon{background:var(--green)}
.tier-label{font-family:'Century Gothic','Jost',Futura,'Trebuchet MS',sans-serif;font-weight:900;font-size:16px;letter-spacing:-.2px}

/* ═══ HELPER BLOCK ═══ */
.helper-block{
  font-size:12.5px;color:var(--ink-mid);background:var(--cream);
  border-left:3px solid var(--lime);padding:10px 14px;
  border-radius:0 8px 8px 0;margin-top:14px;line-height:1.55
}
.helper-block strong{color:var(--ink)}

/* Mobile fixes */
@media(max-width:600px){
  .teacher-bar{padding:8px 14px;font-size:10.5px}
  .brand-bar{padding:10px 14px}
  .single-pane{padding:22px 16px 60px}
}

/* ═══ COMPLETE BANNER (slides in when activity is completed) ═══ */
.complete-banner{
  position:fixed;bottom:20px;left:50%;transform:translate(-50%,120%);
  background:#1A1210;color:#fff;border-radius:14px;padding:16px 22px;
  box-shadow:0 12px 40px rgba(0,0,0,.25);z-index:100;max-width:640px;width:calc(100% - 40px);
  transition:transform .3s ease
}
.complete-banner.visible{transform:translate(-50%,0)}
.complete-banner-inner{
  display:flex;align-items:center;gap:16px;flex-wrap:wrap
}
.complete-banner .complete-icon{
  background:var(--lime);color:#1A1210;width:34px;height:34px;
  border-radius:50%;display:inline-flex;align-items:center;justify-content:center;
  font-weight:900;font-size:16px;flex-shrink:0
}
.complete-banner .complete-text{flex:1;min-width:180px;font-size:13px;line-height:1.5;color:rgba(255,255,255,.8)}
.complete-banner .complete-text strong{
  display:block;font-family:'Century Gothic','Jost',Futura,'Trebuchet MS',sans-serif;font-weight:900;font-size:15px;
  color:#fff;margin-bottom:2px
}
.complete-banner .complete-actions{display:flex;gap:8px;flex-wrap:wrap}
.complete-banner .btn{background:var(--lime);color:#1A1210}
.complete-banner .btn:hover{background:#fff;color:#1A1210}
.complete-banner .btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.25)}
.complete-banner .btn-ghost:hover{background:rgba(255,255,255,.08);border-color:#fff;color:#fff;transform:none}

/* ═══ PREVIEW MODE STRIP ═══ */
.preview-strip{
  background:var(--lime);color:#1A1210;padding:10px 22px;
  display:flex;align-items:center;justify-content:space-between;
  gap:14px;flex-wrap:wrap;font-size:12px;font-weight:600
}
.preview-strip::before{
  content:'⚠ PREVIEW MODE';
  background:#1A1210;color:var(--lime);
  padding:4px 10px;border-radius:50px;
  font-size:10px;font-weight:700;letter-spacing:1.6px
}
.preview-strip .strip-msg{flex:1;min-width:200px}
.preview-strip .strip-msg strong{font-family:'Century Gothic','Jost',Futura,'Trebuchet MS',sans-serif;font-weight:900}
.preview-strip .strip-actions{display:flex;gap:8px;flex-wrap:wrap}
.preview-strip .strip-btn{
  background:#1A1210;color:#fff;border:none;padding:6px 14px;
  border-radius:50px;font-family:inherit;font-size:11px;font-weight:700;
  cursor:pointer;text-decoration:none;letter-spacing:.3px;
  display:inline-flex;align-items:center;gap:6px
}
.preview-strip .strip-btn:hover{background:#000}
.preview-strip .strip-btn.ghost{background:transparent;border:1.5px solid #1A1210;color:#1A1210}
.preview-strip .strip-btn.ghost:hover{background:rgba(0,0,0,.08)}

/* ── Shared grade-band toggle ── */
.band-row{display:flex;align-items:center;flex-wrap:wrap;gap:7px;background:var(--paper);border:1px solid var(--border);border-radius:50px;padding:7px 10px;margin-bottom:18px}
.band-lbl{font-size:10px;letter-spacing:1.4px;text-transform:uppercase;color:var(--ink-light);font-weight:700;padding:0 6px}
.band-pill{background:transparent;border:1.5px solid var(--border);border-radius:50px;padding:7px 13px;font-family:inherit;font-size:12.5px;font-weight:600;color:var(--ink-mid);cursor:pointer;transition:all .14s}
.band-pill:hover{border-color:var(--ink-light)}
.band-pill.on{background:var(--ink);border-color:var(--ink);color:#fff}
.band-note{font-size:11px;color:var(--ink-light);font-style:italic;margin-left:4px}
@media(max-width:560px){.band-note{display:none}}