/* ==================================================================
 * TheGermanStefan Academy — Special Skills shared lesson styles
 * special-skills/engine/ss-lesson.css
 *
 * Design tokens are copied verbatim from the certified R18 lesson
 * corpus (e.g. speaking-listening/a2/present/gtc-a2present002-*.html
 * and grammar/b1/index.html) so that a Special Skills lesson sits
 * beside an existing lesson without a visible seam. Nothing here is
 * invented: the palette, radii, shadow and the sticky top/bottom bar
 * geometry are the Academy's.
 *
 * Everything specific to Special Skills is prefixed .ss- so it can
 * never collide with an engine-owned class.
 * ================================================================== */

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --navy:#0B1628;--gold:#C9A84C;--cream:#F8F6F1;
  --grn:#1A5C2A;--grnb:#D4EDD9;--amb:#7A5200;--ambb:#FFF3CD;
  --redb:#FAD7D7;--redh:#8B1A1A;--blub:#EBF4FF;--bluh:#1A3C6B;
  --purp:#4A3080;--purpb:#F0EEF8;
  --mgray:#6B6B6B;--lgray:#CCCCCC;--white:#fff;
  --text:#2D3748;--gray:#6B7280;
  --shadow:0 2px 12px rgba(11,22,40,.10);--rad:10px;--rad-sm:6px;
}

body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  background:var(--cream);color:var(--text);min-height:100vh;
  display:flex;flex-direction:column;line-height:1.55}

/* ---------- top bar / breadcrumb / progress ---------- */
#topbar{background:var(--navy);color:var(--white);padding:10px 16px;
  display:flex;flex-direction:column;gap:6px;position:sticky;top:0;z-index:100}
#breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:4px;font-size:.78rem;opacity:.85}
#breadcrumb li::after{content:' \203A';margin-left:4px;opacity:.6}
#breadcrumb li:last-child::after{content:''}
#breadcrumb a{color:var(--gold);text-decoration:none}
#breadcrumb a:hover,#breadcrumb a:focus-visible{text-decoration:underline}
#breadcrumb li:last-child{color:var(--white);font-weight:600}
#progress-row{display:flex;align-items:center;gap:8px}
#progress-bar{flex:1;height:6px;background:rgba(255,255,255,.2);border-radius:3px;overflow:hidden}
#progress-fill{height:100%;background:var(--gold);width:0%;transition:width .4s ease;border-radius:3px}
#progress-label{font-size:.72rem;opacity:.85;min-width:34px;text-align:right}

/* ---------- layout ---------- */
#main{flex:1;padding:20px 16px;max-width:780px;width:100%;margin:0 auto}
#bottom-nav{background:var(--white);border-top:2px solid var(--lgray);
  padding:12px 16px;display:flex;justify-content:space-between;align-items:center;
  gap:12px;position:sticky;bottom:0;z-index:100}
.btn-nav{background:var(--navy);color:var(--white);border:none;padding:10px 20px;
  border-radius:var(--rad-sm);cursor:pointer;font:inherit;font-size:.95rem;font-weight:600;
  min-width:110px;transition:opacity .2s}
.btn-nav:disabled{opacity:.35;cursor:not-allowed}
.btn-nav-fwd{background:var(--gold);color:var(--navy)}
#phase-info{font-size:.82rem;color:var(--mgray);text-align:center}

/* ---------- cards ---------- */
.card{background:var(--white);border-radius:var(--rad);padding:20px;
  margin-bottom:16px;box-shadow:var(--shadow)}
.card-title{font-size:1.2rem;font-weight:700;color:var(--navy);margin-bottom:10px}
.card-sub{font-size:.9rem;color:var(--mgray);margin-bottom:14px}
.section-hdr{font-size:.95rem;font-weight:700;color:var(--navy);margin:16px 0 8px;
  padding-bottom:4px;border-bottom:2px solid var(--lgray)}
.concept-box{background:var(--blub);border-left:4px solid var(--bluh);
  padding:14px;border-radius:var(--rad-sm);margin-bottom:14px}
.concept-box p{font-size:.95rem;line-height:1.6;margin-bottom:6px}
.concept-box p:last-child{margin-bottom:0}

/* ---------- lesson meta strip (objective / duration / prerequisite) ---------- */
.ss-meta{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));
  gap:10px;margin-bottom:16px}
.ss-meta-item{background:var(--ambb);border:1px solid rgba(201,168,76,.55);
  border-radius:var(--rad-sm);padding:10px 12px}
.ss-meta-k{font-size:.66rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;
  color:var(--amb);display:block;margin-bottom:3px}
.ss-meta-v{font-size:.88rem;color:var(--navy)}

/* ---------- difficulty path selector ---------- */
.ss-paths{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.ss-path-btn{background:var(--white);border:2px solid var(--lgray);color:var(--navy);
  border-radius:999px;padding:6px 16px;cursor:pointer;font:inherit;font-size:.84rem;font-weight:600}
.ss-path-btn[aria-pressed="true"]{background:var(--navy);border-color:var(--navy);color:var(--white)}
.ss-path-note{font-size:.8rem;color:var(--mgray);margin-bottom:12px}

/* ---------- German / English / Spanish trio ---------- */
.ss-de{font-size:1.02rem;font-weight:700;color:var(--navy)}
.ss-en{font-size:.88rem;color:var(--mgray)}
.ss-es{font-size:.86rem;color:var(--purp)}
.ss-es::before{content:'ES ';font-size:.66rem;font-weight:700;letter-spacing:.08em;opacity:.75}
.ss-ipa{font-size:.8rem;color:var(--bluh);font-style:italic}

/* ---------- vocabulary ---------- */
.ss-vocab{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:12px}
.ss-vocab-card{background:var(--white);border:2px solid var(--lgray);border-radius:var(--rad);
  padding:14px;display:flex;flex-direction:column;gap:6px}
.ss-vocab-id{font-size:.66rem;letter-spacing:.06em;color:var(--gray);font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.ss-vocab-id.ss-new{color:var(--amb);font-weight:700}

/* ---------- audio ---------- */
.btn-audio{background:var(--blub);border:2px solid var(--bluh);color:var(--bluh);
  border-radius:var(--rad-sm);padding:5px 12px;cursor:pointer;font:inherit;font-size:.85rem;
  font-weight:600;width:fit-content}
.btn-audio:hover:not(:disabled){background:var(--bluh);color:var(--white)}
.btn-slow{background:var(--ambb);border:2px solid var(--gold);color:var(--amb);
  border-radius:var(--rad-sm);padding:6px 14px;cursor:pointer;font:inherit;font-size:.84rem;font-weight:600}
.btn-slow.active{background:var(--gold);color:var(--navy)}
.audio-controls{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:14px;align-items:center}
.audio-line-active{background:var(--ambb)}

/* ---------- dialogue ---------- */
.dialogue-box{background:var(--white);border-radius:var(--rad);margin-bottom:14px;
  overflow:hidden;border:1px solid var(--lgray)}
.dlg-line{display:flex;gap:10px;padding:11px 14px;border-bottom:1px solid var(--lgray);
  align-items:flex-start;flex-wrap:wrap}
.dlg-line:last-child{border-bottom:none}
.dlg-speaker{font-size:.72rem;font-weight:700;min-width:92px;padding-top:3px;
  letter-spacing:.04em;text-transform:uppercase}
.dlg-speaker.A{color:var(--bluh)}
.dlg-speaker.B{color:var(--grn)}
.dlg-text{flex:1;min-width:200px;display:flex;flex-direction:column;gap:3px}

/* ---------- exercises ---------- */
.prac-item{background:var(--white);border:2px solid var(--lgray);
  border-radius:var(--rad);padding:16px;margin-bottom:14px}
.prac-q{font-size:1rem;font-weight:600;color:var(--navy);margin-bottom:10px}
.opts{display:flex;flex-direction:column;gap:8px;margin-bottom:6px}
.btn-opt{background:var(--cream);border:2px solid var(--lgray);border-radius:var(--rad-sm);
  padding:9px 14px;cursor:pointer;font:inherit;font-size:.93rem;text-align:left;transition:all .15s}
.btn-opt:hover:not(:disabled){border-color:var(--navy);background:var(--blub)}
.btn-opt:disabled{cursor:not-allowed}
.btn-opt.correct{background:var(--grnb);border-color:var(--grn);color:var(--grn);font-weight:600}
.btn-opt.wrong{background:var(--redb);border-color:var(--redh);color:var(--redh);font-weight:600}
.feedback{font-size:.88rem;margin-top:8px;min-height:20px}
.feedback .fb-es{display:block;color:var(--purp);font-size:.84rem;margin-top:3px}
.fb-ok{color:var(--grn)}
.fb-no{color:var(--redh)}

/* ---------- open response ---------- */
.ss-open{width:100%;min-height:104px;border:2px solid var(--lgray);border-radius:var(--rad-sm);
  padding:10px 12px;font:inherit;font-size:.93rem;resize:vertical;background:var(--white);color:var(--text)}
.ss-open:focus-visible{border-color:var(--bluh)}
.ss-model{background:var(--purpb);border:2px solid var(--purp);border-radius:var(--rad-sm);
  padding:12px;margin-top:10px}
.ss-model-k{font-size:.68rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase;
  color:var(--purp);display:block;margin-bottom:6px}

/* ---------- simulation ---------- */
.ss-sim-turn{background:var(--white);border:2px solid var(--lgray);border-left:4px solid var(--bluh);
  border-radius:var(--rad);padding:14px;margin-bottom:12px}
.ss-sim-reply{background:var(--blub);border-left:4px solid var(--bluh);border-radius:var(--rad-sm);
  padding:12px;margin:10px 0}
.ss-sim-coach{background:var(--ambb);border-left:4px solid var(--gold);border-radius:var(--rad-sm);
  padding:10px 12px;margin-top:8px;font-size:.86rem;color:var(--amb)}
.ss-sim-choice{display:block;width:100%;text-align:left;background:var(--cream);
  border:2px solid var(--lgray);border-radius:var(--rad-sm);padding:11px 14px;
  margin-bottom:8px;cursor:pointer;font:inherit}
.ss-sim-choice:hover:not(:disabled){border-color:var(--navy);background:var(--blub)}
.ss-sim-choice:disabled{cursor:not-allowed;opacity:.75}
.ss-sim-kind{display:inline-block;font-size:.64rem;font-weight:700;letter-spacing:.08em;
  text-transform:uppercase;border-radius:4px;padding:2px 6px;margin-bottom:5px}
.ss-sim-kind.q{background:var(--purpb);color:var(--purp)}
.ss-sim-kind.a{background:var(--grnb);color:var(--grn)}
.ss-sim-log{border-top:2px solid var(--lgray);margin-top:14px;padding-top:12px}

/* ---------- recap / summary ---------- */
.summary-list{list-style:none;padding:0;margin:0}
.summary-list li{padding:10px 14px;border-left:3px solid var(--gold);margin-bottom:10px;
  background:var(--ambb);border-radius:0 var(--rad-sm) var(--rad-sm) 0;font-size:.94rem}
.complete-card{text-align:center;padding:34px 20px}
.complete-icon{font-size:2.6rem;margin-bottom:12px}

/* ---------- legal / scope notice ---------- */
.ss-notice{background:var(--purpb);border:1px solid var(--purp);border-left:4px solid var(--purp);
  border-radius:var(--rad-sm);padding:12px 14px;margin-bottom:16px;font-size:.86rem;color:var(--purp)}
.ss-notice strong{color:var(--purp)}

/* ---------- premium lock chip ---------- */
.ss-lock-chip{display:inline-block;font-size:.64rem;font-weight:700;letter-spacing:.09em;
  text-transform:uppercase;background:var(--gold);color:var(--navy);
  border-radius:4px;padding:2px 7px;margin-left:8px;vertical-align:middle}
.ss-locked{position:relative}

/* ---------- focus visibility: one rule, everywhere ---------- */
a:focus-visible,button:focus-visible,textarea:focus-visible,
select:focus-visible,[tabindex]:focus-visible{
  outline:3px solid var(--bluh);outline-offset:2px;border-radius:3px}
#topbar a:focus-visible{outline-color:var(--gold)}

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

.hidden{display:none}

/* ---------- Spanish mirror lines ----------
 * Every English supporting string on the page is catalogue-governed
 * (data-tgs-key). The Spanish line printed under it is the SAME text the
 * Spanish catalogue holds for that key, shown as a permanent support for
 * a Spanish-speaking learner reading the English page. When the locale
 * engine actually switches the interface to Spanish it rewrites the
 * English line, and the mirror would then be a duplicate — so it is
 * hidden. platform/js/locale.js writes data-tgs-locale on <html>. */
html[data-tgs-locale="es"] [data-ss-es-mirror]{display:none}

/* ---------- responsive ---------- */
@media (max-width:620px){
  #main{padding:16px 12px}
  .btn-nav{min-width:92px;padding:10px 14px;font-size:.9rem}
  #phase-info{font-size:.75rem}
  .dlg-speaker{min-width:100%;padding-top:0}
  .ss-vocab{grid-template-columns:1fr}
}
@media (max-width:380px){
  #bottom-nav{flex-wrap:wrap;gap:8px}
  #phase-info{order:3;width:100%}
}

/* ---------- honour reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;
    transition-duration:.001ms !important;scroll-behavior:auto !important}
}