/* ==========================================================
   QRV by DN9MAX — Design Tokens
   Farbwelt: Wasserfall-Display / Röhrenradio-Skala
   ========================================================== */

/* Lokal gehostete Fonts (kein externer Aufruf, DSGVO-unkritisch) */
@font-face{font-family:'Space Grotesk';font-weight:500;src:url('../vendor/fonts/space-grotesk-latin-500-normal.woff2') format('woff2');font-display:swap;}
@font-face{font-family:'Space Grotesk';font-weight:600;src:url('../vendor/fonts/space-grotesk-latin-600-normal.woff2') format('woff2');font-display:swap;}
@font-face{font-family:'Space Grotesk';font-weight:700;src:url('../vendor/fonts/space-grotesk-latin-700-normal.woff2') format('woff2');font-display:swap;}
@font-face{font-family:'IBM Plex Sans';font-weight:400;src:url('../vendor/fonts/ibm-plex-sans-latin-400-normal.woff2') format('woff2');font-display:swap;}
@font-face{font-family:'IBM Plex Sans';font-weight:500;src:url('../vendor/fonts/ibm-plex-sans-latin-500-normal.woff2') format('woff2');font-display:swap;}
@font-face{font-family:'IBM Plex Sans';font-weight:600;src:url('../vendor/fonts/ibm-plex-sans-latin-600-normal.woff2') format('woff2');font-display:swap;}
@font-face{font-family:'IBM Plex Mono';font-weight:400;src:url('../vendor/fonts/ibm-plex-mono-latin-400-normal.woff2') format('woff2');font-display:swap;}
@font-face{font-family:'IBM Plex Mono';font-weight:500;src:url('../vendor/fonts/ibm-plex-mono-latin-500-normal.woff2') format('woff2');font-display:swap;}
@font-face{font-family:'IBM Plex Mono';font-weight:600;src:url('../vendor/fonts/ibm-plex-mono-latin-600-normal.woff2') format('woff2');font-display:swap;}

:root{
  color-scheme: dark; /* verhindert automatische "Force Dark"-Neueinfaerbung
                          durch manche Browser, die sonst ein bereits dunkles
                          Design zusaetzlich (und mit schlechtem Kontrast)
                          umfaerben */
  --bg:            #0A1116;
  --bg-panel:      #142B33;
  --bg-panel-alt:  #1B3A44;
  --bg-raised:     #234756;
  --accent:        #E8A33D;
  --accent-soft:   #F4C878;
  --accent-dim:    #8A6224;
  --good:          #8CE8B0;
  --good-dim:      #2C4A3B;
  --bad:           #FF9482;
  --bad-dim:       #4A2C26;
  --text:          #FFFFFF;
  --text-dim:      #D3DEE2;
  --text-faint:    #9FB0B6;
  --border:        rgba(255,255,255,0.14);
  --border-strong: rgba(255,255,255,0.28);
  --radius-s: 6px;
  --radius-m: 12px;
  --radius-l: 20px;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --content-width: 1120px;  /* Desktop-Dashboard-Breite (Home) */
  --reading-width: 720px;   /* Lesebreite fuer Fragen/Kategorien */
}

*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background:
    radial-gradient(ellipse 900px 500px at 12% -8%, rgba(232,163,61,0.09), transparent 60%),
    radial-gradient(ellipse 700px 500px at 100% 10%, rgba(140,232,176,0.05), transparent 55%),
    var(--bg);
  color:var(--text);
  font-family:var(--font-body);
  min-height:100vh;
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
a{color:inherit;}
button{font-family:inherit;}
::selection{background:var(--accent);color:#1a1006;}

/* Sichtbarer Fokus-Ring für Tastaturnutzer (nicht bei Maus-/Touch-Klick) */
:focus{outline:none;}
:focus-visible{outline:2px solid var(--accent); outline-offset:2px; border-radius:4px;}

/* Subtile Scanline-Textur */
body::before{
  content:"";
  position:fixed; inset:0; pointer-events:none; z-index:0;
  background-image:repeating-linear-gradient(
    to bottom, rgba(251,249,245,0.010) 0px, rgba(251,249,245,0.010) 1px,
    transparent 1px, transparent 3px
  );
  opacity:0.5;
}

#app{position:relative; z-index:1; max-width:var(--content-width); margin:0 auto;
  padding:24px 20px 72px;
  padding-left:max(20px, env(safe-area-inset-left));
  padding-right:max(20px, env(safe-area-inset-right));
  padding-bottom:max(72px, calc(env(safe-area-inset-bottom) + 24px));
}
#app.narrow{max-width:var(--reading-width);}

/* ---------- Top-Bar ---------- */
.topbar{
  display:flex; align-items:center; justify-content:space-between;
  margin-bottom:28px;
}
.topbar .brand{display:flex; align-items:center; gap:10px;}
.topbar .brand .mark{
  font-family:var(--font-mono); font-weight:600; letter-spacing:0.5px;
  font-size:15px; color:var(--accent);
  border:1.5px solid var(--accent-dim); border-radius:var(--radius-s);
  padding:4px 8px; background:rgba(232,163,61,0.08);
}
.topbar .brand .by{font-family:var(--font-mono); font-size:12px; color:var(--text-faint); letter-spacing:0.5px;}
.topbar .tagline{font-size:12.5px; color:var(--text-faint); font-family:var(--font-mono); display:none;}
.topbar-right{display:flex; align-items:center; gap:16px;}
.search-btn{
  display:flex; align-items:center; gap:6px;
  background:none; border:1px solid var(--border-strong); color:var(--text-dim);
  border-radius:20px; padding:6px 12px; font-size:12.5px; cursor:pointer;
}
.search-btn:hover{border-color:var(--accent); color:var(--accent);}
.search-hint{font-size:12.5px; color:var(--text-faint); margin:4px 0 12px;}
.search-row{align-items:flex-start;}
.search-row .name{line-height:1.4;}

/* ---------- Hero (Startseite) ---------- */
.hero{
  display:flex; align-items:flex-end; justify-content:space-between; gap:32px;
  padding:30px 32px;
  background:
    radial-gradient(ellipse 500px 260px at 100% 0%, rgba(232,163,61,0.10), transparent 65%),
    linear-gradient(160deg, var(--bg-raised), var(--bg-panel));
  border:1px solid var(--border-strong);
  border-radius:var(--radius-l);
  margin-bottom:28px;
  box-shadow:0 1px 0 rgba(255,255,255,0.03) inset, 0 20px 40px -24px rgba(0,0,0,0.6);
}
.hero .htext{min-width:0;}
.hero .eyebrow{
  font-family:var(--font-mono); font-size:12px; color:var(--accent);
  letter-spacing:1.5px; text-transform:uppercase; margin-bottom:10px;
}
.hero h1{
  font-family:var(--font-display); font-size:34px; font-weight:700; margin:0 0 8px;
  letter-spacing:-0.3px; line-height:1.08;
}
.hero p{font-size:14.5px; color:var(--text-dim); margin:0; max-width:46ch;}
.hero .hero-meter{flex-shrink:0; text-align:center;}
.hero .hero-meter .lbl{
  font-family:var(--font-mono); font-size:10.5px; color:var(--text-faint);
  text-transform:uppercase; letter-spacing:1px; margin-top:2px;
}

/* ---------- Callsign-Plate (Unterseiten-Header) ---------- */
.callsign-plate{
  display:flex; align-items:center; gap:14px;
  padding:16px 18px;
  background:linear-gradient(160deg, var(--bg-raised), var(--bg-panel));
  border:1px solid var(--border-strong);
  border-radius:var(--radius-m);
  margin-bottom:22px;
  box-shadow:0 1px 0 rgba(255,255,255,0.03) inset, 0 8px 24px -12px rgba(0,0,0,0.5);
}
.callsign-plate .mark{
  font-family:var(--font-mono); font-weight:600; letter-spacing:0.5px;
  font-size:18px; color:var(--accent);
  border:1.5px solid var(--accent-dim);
  border-radius:var(--radius-s);
  padding:5px 9px;
  background:rgba(232,163,61,0.08);
  white-space:nowrap;
}
.callsign-plate .titles{flex:1; min-width:0;}
.callsign-plate h1{
  font-family:var(--font-display); font-size:17px; margin:0; font-weight:600;
  letter-spacing:0.2px;
}
.callsign-plate .subtitle{font-size:12.5px; color:var(--text-dim); margin-top:2px;}
.back-btn{
  background:none; border:1px solid var(--border-strong); color:var(--text-dim);
  border-radius:var(--radius-s); padding:7px 11px; font-size:13px; cursor:pointer;
  font-family:var(--font-mono);
}
.back-btn:hover{border-color:var(--accent); color:var(--accent);}

/* ---------- S-Meter (Signatur-Element) ---------- */
.smeter{position:relative; width:64px; height:40px; flex-shrink:0;}
.smeter svg{width:100%; height:100%; display:block;}
.smeter-big{width:150px; height:94px;}
.hero-meter .smeter{width:118px; height:70px;}

/* ---------- Stat-Leiste (Startseite) ---------- */
.stat-row{
  display:grid; grid-template-columns:repeat(4, 1fr); gap:12px;
  margin-bottom:28px;
}
.stat-box{
  background:var(--bg-panel-alt); border:1px solid var(--border-strong); border-radius:var(--radius-m);
  padding:16px 18px;
}
.stat-box .num{font-family:var(--font-display); font-size:26px; font-weight:600; line-height:1; color:var(--text);}
.stat-box .lbl{font-family:var(--font-mono); font-size:11px; color:var(--text-faint); text-transform:uppercase; letter-spacing:0.8px; margin-top:6px;}

/* ---------- Section-Grid (Startseite, Dashboard-Kacheln) ---------- */
.section-grid{
  display:grid; grid-template-columns:repeat(auto-fit, minmax(280px, 1fr)); gap:14px;
}
.section-card{
  display:flex; flex-direction:column; gap:16px;
  background:var(--bg-panel-alt);
  border:1px solid var(--border-strong);
  border-radius:var(--radius-m);
  padding:20px;
  cursor:pointer;
  transition:border-color .15s, transform .15s, background .15s, box-shadow .15s;
  text-align:left;
}
.section-card:hover{border-color:var(--accent); background:var(--bg-raised); transform:translateY(-2px); box-shadow:0 12px 24px -16px rgba(0,0,0,0.6);}
.section-card:active{transform:translateY(0);}
.section-card .card-top{display:flex; align-items:flex-start; justify-content:space-between; gap:12px;}
.section-card .info{flex:1; min-width:0;}
.section-card .info .band{
  font-family:var(--font-mono); font-size:11px; color:var(--accent); letter-spacing:1px;
  text-transform:uppercase; margin-bottom:5px;
}
.section-card h3{font-family:var(--font-display); font-size:17px; margin:0 0 5px; font-weight:600; color:var(--text);}
.section-card p{font-size:12.5px; color:var(--text-dim); margin:0;}
.section-card.disabled{opacity:0.45; cursor:default;}
.section-card.disabled:hover{border-color:var(--border-strong); background:var(--bg-panel-alt); transform:none; box-shadow:none;}
.chip{
  display:inline-block; font-family:var(--font-mono); font-size:10.5px;
  border:1px solid var(--border-strong); border-radius:20px; padding:2px 9px;
  color:var(--text-dim);
}

/* ---------- Kategorie-Liste ---------- */
.cat-list{display:flex; flex-direction:column; gap:8px;}
.cat-group-title{
  font-family:var(--font-mono); font-size:11px; text-transform:uppercase;
  letter-spacing:1.2px; color:var(--text-faint); margin:20px 0 8px; padding-left:2px;
}
.cat-group-title:first-child{margin-top:4px;}
.cat-row{
  display:flex; align-items:center; gap:12px; text-align:left;
  background:var(--bg-panel-alt); border:1px solid var(--border-strong); border-radius:var(--radius-s);
  padding:12px 14px; cursor:pointer; transition:border-color .15s, background .15s;
}
.cat-row:hover{border-color:var(--accent); background:var(--bg-raised);}
.cat-row .name{flex:1; font-size:13.5px; color:var(--text); font-weight:500;}
.cat-row .count{font-family:var(--font-mono); font-size:11.5px; color:var(--text-dim);}
.mini-meter{width:34px; height:22px; flex-shrink:0;}
.mini-meter svg{width:100%; height:100%; display:block;}

.action-row{display:flex; gap:10px; margin-bottom:18px; flex-wrap:wrap;}

.exam-card{
  display:flex; align-items:center; justify-content:space-between; gap:16px;
  background:linear-gradient(160deg, var(--bg-raised), var(--bg-panel-alt));
  border:1.5px solid var(--accent-dim); border-radius:var(--radius-m);
  padding:16px 18px; margin-bottom:16px;
}
.exam-card-title{font-family:var(--font-display); font-size:15.5px; font-weight:600; margin-bottom:3px;}
.exam-card-desc{font-size:12px; color:var(--text-dim); line-height:1.4;}
.exam-timer{
  font-family:var(--font-mono); font-weight:600; font-size:13px; color:var(--accent);
  border:1px solid var(--accent-dim); border-radius:5px; padding:2px 9px; background:rgba(232,163,61,0.08);
}
@media (max-width:480px){
  .exam-card{flex-direction:column; align-items:stretch; text-align:center;}
}
.btn{
  font-family:var(--font-body); font-weight:600; font-size:13.5px;
  border-radius:var(--radius-s); padding:10px 16px; cursor:pointer; border:1px solid transparent;
}
.btn-primary{background:var(--accent); color:#241503; border-color:var(--accent);}
.btn-primary:hover{background:var(--accent-soft);}
.btn-ghost{background:transparent; border-color:var(--border-strong); color:var(--text);}
.btn-ghost:hover{border-color:var(--accent); color:var(--accent);}
.btn:disabled{opacity:0.4; cursor:default;}

/* ---------- Quiz-Ansicht ---------- */
.progress-bar{
  height:5px; background:var(--bg-panel); border-radius:3px; overflow:hidden; margin-bottom:16px;
  border:1px solid var(--border);
}
.progress-bar .fill{height:100%; background:linear-gradient(90deg, var(--accent-dim), var(--accent)); transition:width .3s;}
.session-meta{
  display:flex; justify-content:space-between; align-items:center;
  font-family:var(--font-mono); font-size:11.5px; color:var(--text-dim); margin-bottom:10px;
}
.session-meta .score-good{color:var(--good);}
.session-meta .score-bad{color:var(--bad);}

.q-card{
  background:var(--bg-panel-alt); border:1px solid var(--border-strong); border-radius:var(--radius-l);
  padding:24px 22px 22px;
}
.q-code{
  font-family:var(--font-mono); font-size:12px; color:var(--accent);
  border:1px solid var(--accent-dim); display:inline-block; padding:3px 9px; border-radius:5px;
  margin-bottom:14px; letter-spacing:0.5px;
}
.q-text{font-size:17.5px; line-height:1.6; margin:0 0 18px; color:var(--text); font-weight:450;}
.q-text u{text-decoration-color:var(--accent); text-decoration-thickness:2px;}
.q-image{max-width:100%; background:#fff; border-radius:var(--radius-s); padding:10px; margin-bottom:18px;}
.q-image img{max-width:100%; display:block; margin:0 auto;}

.options{display:flex; flex-direction:column; gap:10px;}
.option{
  display:flex; align-items:flex-start; gap:12px;
  background:var(--bg-raised); border:1.5px solid var(--border-strong); border-radius:var(--radius-s);
  padding:13px 14px; cursor:pointer; text-align:left; font-size:15px; color:var(--text); font-weight:450;
  transition:border-color .15s, background .15s;
}
.option:hover:not(.locked){border-color:var(--accent); background:#2A5566;}
.option .letter{
  font-family:var(--font-mono); font-weight:700; color:var(--text-dim); flex-shrink:0;
  width:20px;
}
.option.correct{border-color:var(--good); background:var(--good-dim);}
.option.correct .letter{color:var(--good);}
.option.wrong{border-color:var(--bad); background:var(--bad-dim);}
.option.wrong .letter{color:var(--bad);}
.option.selected{border-color:var(--accent); background:var(--bg-raised);}
.option.selected .letter{color:var(--accent);}
.option.locked{cursor:default;}
.option img{max-width:180px; background:#fff; border-radius:4px; padding:6px; margin-top:4px;}

.q-footer{display:flex; justify-content:flex-end; margin-top:20px;}

/* ---------- Ergebnis-Ansicht ---------- */
.result-hero{text-align:center; padding:26px 10px 8px;}
.result-hero .smeter-big{margin:0 auto 10px;}
.result-hero h2{font-family:var(--font-display); font-size:22px; margin:6px 0 4px;}
.result-hero p{color:var(--text-dim); font-size:13.5px; margin:0;}
.verdict-good{color:var(--good) !important; font-weight:600; font-size:15px !important;}
.verdict-amber{color:var(--accent) !important; font-weight:600; font-size:15px !important;}
.verdict-bad{color:var(--bad) !important; font-weight:600; font-size:15px !important;}
.exam-scale-note{font-family:var(--font-mono); font-size:11px !important; color:var(--text-faint) !important; margin-top:8px !important;}
.exam-timeout-note{
  background:var(--bad-dim); border:1px solid var(--bad); border-radius:var(--radius-s);
  padding:10px 14px; font-size:13px; color:var(--text); margin-bottom:16px;
}
.result-stats{
  display:flex; justify-content:center; gap:22px; margin:20px 0 6px;
  font-family:var(--font-mono);
}
.result-stats div{text-align:center;}
.result-stats .num{font-size:22px; font-weight:600;}
.result-stats .lbl{font-size:10.5px; color:var(--text-faint); text-transform:uppercase; letter-spacing:1px;}

.katex{color:var(--text); font-size:1.04em;}
.katex-display{margin:8px 0 !important;}

footer.app-footer{
  text-align:center; color:var(--text-faint); font-size:11px; margin-top:36px;
  font-family:var(--font-mono);
}
footer.app-footer a{color:var(--text-dim);}
.reset-link{
  background:none; border:none; color:var(--text-faint); font-family:var(--font-mono);
  font-size:11px; text-decoration:underline; cursor:pointer; padding:8px 0; margin-top:2px;
}
.reset-link:hover{color:var(--bad);}

.kbd-hint{
  text-align:center; font-size:11.5px; color:var(--text-faint); margin-top:18px;
  font-family:var(--font-mono);
}
.kbd-hint kbd{
  display:inline-block; border:1px solid var(--border-strong); border-bottom-width:2px;
  border-radius:4px; padding:1px 6px; font-family:var(--font-mono); font-size:11px;
  color:var(--text-dim); background:var(--bg-panel-alt);
}
@media (max-width:600px){
  .kbd-hint{display:none;} /* Tastaturkuerzel sind auf Touch-Geraeten irrelevant */
}

/* ---------- Wissen-Bereich ---------- */
.wissen-block{margin-bottom:30px;}
.wissen-h2{font-family:var(--font-display); font-size:18px; font-weight:600; margin:0 0 8px; color:var(--text);}
.wissen-p{font-size:13.5px; color:var(--text-dim); margin:0 0 14px; line-height:1.55;}

.speller-input{
  width:100%; font-family:var(--font-mono); font-size:18px; letter-spacing:1px;
  background:var(--bg-panel-alt); border:1.5px solid var(--border-strong); border-radius:var(--radius-s);
  padding:13px 14px; color:var(--text); text-transform:uppercase;
}
.speller-input:focus{outline:none; border-color:var(--accent);}
.speller-input::placeholder{color:var(--text-faint); text-transform:none;}
.speller-output{
  margin-top:12px; min-height:52px; display:flex; flex-wrap:wrap; gap:8px; align-items:center;
  background:var(--bg-panel-alt); border:1px solid var(--border); border-radius:var(--radius-s);
  padding:12px 14px;
}
.speller-placeholder{color:var(--text-faint); font-size:13.5px;}
.speller-word{
  font-family:var(--font-mono); font-size:13px; font-weight:600; color:var(--accent);
  background:rgba(232,163,61,0.10); border:1px solid var(--accent-dim);
  border-radius:6px; padding:4px 9px;
}

.nato-table{display:flex; flex-direction:column; gap:6px;}
.nato-row{
  display:flex; align-items:center; gap:14px;
  background:var(--bg-panel-alt); border:1px solid var(--border-strong); border-radius:var(--radius-s);
  padding:10px 14px; position:relative;
}
.nato-row.nato-marked{border-left:3px solid var(--mark-color, var(--accent));}
.nato-letter{
  font-family:var(--font-mono); font-weight:700; font-size:15px; color:var(--accent);
  width:22px; flex-shrink:0; text-align:center;
}
.nato-word{font-size:14.5px; font-weight:500; flex:1;}
.nato-tag{font-size:11px; color:var(--text-faint); font-family:var(--font-mono);}
@media (max-width:480px){
  .nato-tag{display:none;}
}

/* ---------- Formelsammlung ---------- */
.formula-notice{
  background:var(--bg-panel-alt); border:1px solid var(--border-strong); border-radius:var(--radius-s);
  padding:12px 14px; font-size:13px; color:var(--text-dim); line-height:1.55; margin-bottom:26px;
}
.formula-item{
  background:var(--bg-panel-alt); border:1px solid var(--border); border-radius:var(--radius-s);
  padding:13px 14px; margin-bottom:9px;
}
.formula-label{font-size:12.5px; font-weight:600; color:var(--accent); margin-bottom:6px;}
.formula-tex{font-size:14.5px; overflow-x:auto; padding-bottom:2px;}
.formula-tex .katex-display{margin:4px 0 !important;}
.formula-note{font-size:11.5px; color:var(--text-faint); margin-top:6px; line-height:1.4;}
.formula-table-wrap{overflow-x:auto; border-radius:var(--radius-s); border:1px solid var(--border-strong);}
.formula-table{width:100%; border-collapse:collapse; font-size:13px;}
.formula-table th{
  background:var(--bg-raised); color:var(--text-dim); font-family:var(--font-mono); font-weight:600;
  font-size:11px; text-transform:uppercase; letter-spacing:0.5px; text-align:left; padding:8px 10px;
  white-space:nowrap;
}
.formula-table td{padding:7px 10px; border-top:1px solid var(--border); white-space:normal; min-width:120px;}
.formula-table tr:nth-child(even) td{background:rgba(255,255,255,0.02);}

.ref-list{margin:0; padding-left:22px; display:flex; flex-direction:column; gap:10px;}
.ref-list li{font-size:13px; color:var(--text-dim); line-height:1.55; padding-left:4px;}
.ref-list li::marker{color:var(--accent); font-family:var(--font-mono); font-weight:600;}

/* ---------- Responsive ---------- */
@media (max-width:820px){
  .stat-row{grid-template-columns:repeat(2, 1fr);}
  .hero{flex-direction:column; align-items:flex-start; gap:18px;}
  .hero-meter{align-self:center;}
}
@media (max-width:420px){
  #app{padding:16px 14px 60px;}
  .hero{padding:22px 18px;}
  .hero h1{font-size:24px;}
  .result-stats{gap:14px;}
  .callsign-plate h1{font-size:15.5px;}
  .stat-row{grid-template-columns:repeat(2, 1fr);}
}
@media (min-width:821px){
  .topbar .tagline{display:block;}
}