:root{
  --navy:#0d3850;--navy-2:#174f6d;--blue:#1e6f96;--green:#16825d;--green-2:#e8f6ef;
  --red:#c63f43;--red-2:#fdeeee;--amber:#d88a1d;--amber-2:#fff6df;--ink:#172630;
  --muted:#61717c;--line:#d8e2e8;--bg:#f4f8fa;--card:#fff;--shadow:0 14px 38px rgba(13,56,80,.10);
  --radius:18px;--radius-sm:12px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,Segoe UI,Arial,sans-serif;line-height:1.5;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button,input,select{font:inherit}
button{cursor:pointer}
img{max-width:100%;display:block}
.hidden{display:none!important}
.muted{color:var(--muted)}
.centered{justify-content:center}
.topbar{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:28px;min-height:72px;padding:10px max(20px,calc((100vw - 1240px)/2));background:rgba(13,56,80,.97);color:#fff;box-shadow:0 5px 20px rgba(0,0,0,.16);backdrop-filter:blur(12px)}
.brand{display:flex;align-items:center;gap:10px;min-width:max-content}
.brand-mark{display:grid;place-items:center;width:42px;height:42px;border-radius:50%;background:#fff;color:var(--navy);font-size:23px}
.brand strong,.brand small{display:block}.brand strong{font-size:17px;line-height:1.15}.brand small{opacity:.72;font-size:12px;margin-top:2px}
.main-nav{margin-left:auto;display:flex;gap:6px;align-items:center}
.main-nav a{padding:10px 11px;border-radius:10px;font-size:14px;font-weight:700;color:rgba(255,255,255,.86)}
.main-nav a:hover,.main-nav a:focus-visible{background:rgba(255,255,255,.12);color:#fff}
.nav-toggle{display:none;margin-left:auto;border:0;background:transparent;color:#fff;font-size:25px}
.page-shell{max-width:1240px;margin:0 auto;padding:34px 20px 64px}
.site-footer{display:flex;justify-content:center;gap:24px;flex-wrap:wrap;padding:25px 20px;background:#e9f0f4;color:var(--muted);font-size:13px;border-top:1px solid var(--line)}
.site-footer a{font-weight:700;color:var(--navy)}
.hero{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(260px,.7fr);gap:48px;align-items:center;padding:48px;border-radius:28px;background:linear-gradient(135deg,#0d3850 0%,#195c7d 70%,#1e6f96 100%);color:#fff;box-shadow:var(--shadow);overflow:hidden;position:relative}
.hero:after{content:"";position:absolute;width:380px;height:380px;border-radius:50%;right:-180px;bottom:-210px;background:rgba(255,255,255,.08)}
.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:12px;font-weight:900;color:#68d0a5}
.hero h1,.page-heading h1{margin:8px 0 14px;line-height:1.08}.hero h1{font-size:clamp(36px,5vw,62px);max-width:850px}.hero p{max-width:780px;font-size:18px;color:rgba(255,255,255,.84)}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:12px;padding:10px 16px;font-weight:800;transition:.15s ease;min-height:44px}
.button:hover{transform:translateY(-1px)}.button:disabled{opacity:.5;cursor:not-allowed;transform:none}
.button.primary{background:var(--green);color:#fff;box-shadow:0 8px 22px rgba(22,130,93,.25)}
.button.secondary{background:#fff;color:var(--navy);border-color:var(--line)}
.button.danger{background:var(--red);color:#fff}.button.sound-button{margin-top:14px;background:var(--navy);color:#fff}
.button.large{padding:13px 22px;min-height:50px;font-size:16px}
.hero .button.secondary{border-color:rgba(255,255,255,.25);background:rgba(255,255,255,.12);color:#fff}
.hero-compass{position:relative;width:260px;height:260px;border:10px solid rgba(255,255,255,.18);border-radius:50%;justify-self:center;box-shadow:inset 0 0 0 2px rgba(255,255,255,.35)}
.hero-compass span{position:absolute;font-weight:900;font-size:18px}.hero-compass .north{top:12px;left:50%;transform:translateX(-50%)}.hero-compass .south{bottom:12px;left:50%;transform:translateX(-50%)}.hero-compass .east{right:15px;top:50%;transform:translateY(-50%)}.hero-compass .west{left:15px;top:50%;transform:translateY(-50%)}
.needle{position:absolute;left:50%;top:50%;width:12px;height:168px;transform:translate(-50%,-50%) rotate(18deg);background:linear-gradient(to bottom,#fff 0 48%,#e65e62 48% 100%);clip-path:polygon(50% 0,100% 48%,64% 48%,64% 100%,36% 100%,36% 48%,0 48%)}
.stat-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:24px 0}.stat-strip article{background:#fff;border:1px solid var(--line);border-radius:15px;padding:20px;box-shadow:0 5px 18px rgba(13,56,80,.05)}.stat-strip strong{display:block;font-size:30px;color:var(--navy)}.stat-strip span{color:var(--muted);font-size:13px}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.feature-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:25px;box-shadow:0 7px 24px rgba(13,56,80,.05);transition:.18s ease}.feature-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#b6d8c9}.feature-card h2{margin:14px 0 8px;color:var(--navy);font-size:20px}.feature-card p{margin:0;color:var(--muted)}.feature-icon{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;background:var(--green-2);color:var(--green);font-size:20px;font-weight:900}
.info-banner,.warning-banner,.error-banner{margin-top:22px;border-radius:14px;padding:16px 18px}.info-banner{background:#eaf5fb;border:1px solid #bedcec;color:var(--navy)}.warning-banner{background:var(--amber-2);border:1px solid #f0d28c;color:#75500f}.error-banner{background:var(--red-2);border:1px solid #efb6b8;color:#8c282c}
.page-heading{display:flex;justify-content:space-between;align-items:end;margin:5px 0 24px}.page-heading h1{font-size:clamp(32px,4vw,48px);color:var(--navy)}.page-heading p{margin:0;max-width:850px;color:var(--muted);font-size:17px}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:0 7px 24px rgba(13,56,80,.06)}
.filter-panel{display:grid;grid-template-columns:repeat(4,minmax(150px,1fr));gap:14px;align-items:end;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin-bottom:18px}.filter-panel.compact{grid-template-columns:2fr 1fr}.filter-panel label,.exam-setup label,.audio-settings label,.login-card label{display:flex;flex-direction:column;gap:6px;color:var(--muted);font-size:12px;font-weight:800}.filter-panel select,.filter-panel input,.exam-setup select,.audio-settings select,.audio-settings input,.login-card input{width:100%;border:1px solid #c8d6de;background:#fff;color:var(--ink);border-radius:10px;padding:10px 12px;min-height:44px}.search-label{grid-column:span 2}
.study-toolbar{display:grid;grid-template-columns:50px 1fr 50px;align-items:center;gap:12px;max-width:970px;margin:0 auto 14px}.study-toolbar>div{text-align:center}.study-toolbar strong{display:block;color:var(--navy)}.study-toolbar small{display:block;color:var(--muted)}
.icon-button{width:46px;height:46px;border-radius:50%;border:1px solid var(--line);background:#fff;color:var(--navy);font-size:21px;font-weight:900;box-shadow:0 4px 12px rgba(13,56,80,.08)}.icon-button.big{width:62px;height:62px;font-size:26px;background:var(--green);color:#fff}.icon-button:hover{border-color:var(--green);transform:translateY(-1px)}
.question-host{max-width:970px;margin:0 auto}.question-card{background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);overflow:hidden}.question-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:15px 20px;background:var(--navy);color:#fff}.question-meta .chip-row{margin:0}.question-meta .chip{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.18);color:#fff}.question-number{font-weight:900}.question-body{padding:24px}.official-image{margin:0 auto 22px;max-width:100%;height:auto;image-rendering:auto}.stem-image{border-radius:8px}.answers{display:grid;gap:12px}.answer-option{position:relative;display:grid;grid-template-columns:48px 1fr;gap:12px;align-items:center;width:100%;text-align:left;border:2px solid var(--line);border-radius:14px;background:#fff;padding:12px;min-height:66px;transition:.12s ease}.answer-option:hover:not(:disabled){border-color:#76b99e;background:#f8fcfa}.answer-option:disabled{cursor:default}.answer-letter{display:grid;place-items:center;width:40px;height:40px;border-radius:11px;background:#edf3f6;color:var(--navy);font-size:18px;font-weight:900}.answer-option img{max-height:150px;max-width:100%;object-fit:contain;object-position:left center}.answer-option.correct{border-color:var(--green);background:var(--green-2)}.answer-option.correct .answer-letter{background:var(--green);color:#fff}.answer-option.wrong{border-color:var(--red);background:var(--red-2)}.answer-option.wrong .answer-letter{background:var(--red);color:#fff}.answer-option.selected:not(.correct):not(.wrong){border-color:var(--blue);background:#ebf6fb}.answer-text{font-size:16px}.answer-feedback{margin-top:18px;border-radius:14px;padding:16px 18px}.answer-feedback.success{background:var(--green-2);border:1px solid #9ed5bc}.answer-feedback.failure{background:var(--red-2);border:1px solid #efb4b7}.answer-feedback h3{margin:0 0 5px}.answer-feedback p{margin:0}.question-actions{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-top:18px;flex-wrap:wrap}.mnemonic-inline{margin-top:16px;background:var(--amber-2);border:1px solid #ead19b;border-radius:14px;padding:15px}.mnemonic-inline strong{color:#7c550e}.chip-row{display:flex;gap:7px;flex-wrap:wrap;margin-top:10px}.chip{display:inline-flex;align-items:center;border:1px solid #d8e3e8;background:#f1f6f8;color:#45606f;border-radius:999px;padding:4px 9px;font-size:11px;font-weight:800}.loading-card{display:flex;align-items:center;justify-content:center;gap:12px;min-height:260px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);color:var(--muted)}.spinner{width:24px;height:24px;border-radius:50%;border:3px solid #d7e3e8;border-top-color:var(--green);animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}
.nav-scenario{padding:14px;background:#f7fafb;border:1px solid var(--line);border-radius:14px;margin-bottom:18px}.nav-scenario h3{margin:0 0 10px;color:var(--navy)}.nav-answer{margin-top:16px;padding:16px;border:2px solid var(--green);background:var(--green-2);border-radius:14px}.self-assess{display:flex;gap:10px;margin-top:14px}
.exam-setup{display:grid;grid-template-columns:1fr 1fr;gap:18px;max-width:780px;margin:0 auto}.exam-setup .muted,.exam-setup .button{grid-column:1/-1}.exam-bar{position:sticky;top:83px;z-index:20;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:14px;max-width:970px;margin:0 auto 14px;padding:11px 16px;background:rgba(255,255,255,.96);border:1px solid var(--line);border-radius:14px;box-shadow:0 7px 20px rgba(13,56,80,.08);backdrop-filter:blur(10px)}.exam-bar>div:first-child small{display:block;color:var(--muted)}.exam-bar .button{justify-self:end}.exam-timer{font-variant-numeric:tabular-nums;font-size:28px;font-weight:900;color:var(--navy)}.exam-timer.warning{color:var(--red)}.exam-navigation{max-width:970px;margin:15px auto;display:flex;justify-content:space-between}.exam-result-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:18px}.result-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;text-align:center}.result-card strong{display:block;font-size:32px;color:var(--navy)}.pass-banner{padding:22px;border-radius:16px;margin-bottom:18px;font-size:20px;font-weight:900}.pass-banner.pass{background:var(--green-2);color:#0f6648;border:1px solid #95d3b8}.pass-banner.fail{background:var(--red-2);color:#8f2d31;border:1px solid #efafb2}.review-list{display:grid;gap:14px}.review-item{background:#fff;border:1px solid var(--line);border-radius:15px;padding:17px}.review-item.wrong{border-left:6px solid var(--red)}.review-item.correct{border-left:6px solid var(--green)}
.mnemonic-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.mnemonic-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:0 7px 24px rgba(13,56,80,.05)}.mnemonic-card-head{display:flex;align-items:center;gap:12px}.mnemonic-card-head span{display:grid;place-items:center;width:36px;height:36px;border-radius:11px;background:var(--navy);color:#fff;font-weight:900}.mnemonic-card h2{margin:0;color:var(--navy);font-size:20px}.mnemonic-card blockquote{margin:18px 0;padding:16px;border-left:5px solid var(--amber);background:var(--amber-2);font-size:19px;font-weight:900;color:#62430d;border-radius:0 12px 12px 0}.mnemonic-card p{color:var(--muted)}.example{padding:13px;background:#f4f8fa;border-radius:11px}
.audio-layout{display:grid;grid-template-columns:340px 1fr;gap:20px}.audio-settings{display:flex;flex-direction:column;gap:16px;align-self:start}.audio-settings label:has(input[type=checkbox]){flex-direction:row;align-items:center;font-size:14px;color:var(--ink)}.audio-settings input[type=checkbox]{width:20px;height:20px}.audio-settings output{font-weight:900;color:var(--navy)}.audio-player{display:flex;min-height:500px;flex-direction:column;justify-content:space-between;text-align:center;background:linear-gradient(180deg,#fff,#eef6f9)}.audio-now{padding:24px}.audio-now span{color:var(--green);font-weight:900}.audio-now h2{font-size:34px;color:var(--navy);margin:15px 0}.audio-now p{font-size:18px;color:var(--muted);max-width:720px;margin:0 auto}.audio-controls{display:flex;justify-content:center;align-items:center;gap:12px;padding:18px}.audio-visual{display:flex;justify-content:center;align-items:center;height:130px;gap:9px}.audio-visual i{display:block;width:9px;height:25px;border-radius:10px;background:var(--green);animation:wave 1s ease-in-out infinite;animation-play-state:paused}.audio-visual.playing i{animation-play-state:running}.audio-visual i:nth-child(2){animation-delay:.12s}.audio-visual i:nth-child(3){animation-delay:.24s}.audio-visual i:nth-child(4){animation-delay:.36s}.audio-visual i:nth-child(5){animation-delay:.48s}@keyframes wave{0%,100%{height:25px}50%{height:100px}}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:20px}.stats-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px}.stats-card strong{display:block;font-size:30px;color:var(--navy)}.stats-card span{color:var(--muted)}.stats-section{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;margin-bottom:18px}.stats-section h2{margin-top:0;color:var(--navy)}.bar-row{display:grid;grid-template-columns:minmax(150px,230px) 1fr 80px;gap:12px;align-items:center;margin:11px 0}.bar-track{height:12px;background:#e9f0f4;border-radius:99px;overflow:hidden}.bar-fill{height:100%;background:linear-gradient(90deg,var(--blue),var(--green));border-radius:99px}.data-table{width:100%;border-collapse:collapse}.data-table th,.data-table td{padding:11px 10px;border-bottom:1px solid var(--line);text-align:left}.data-table th{font-size:12px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted)}.data-table td:last-child,.data-table th:last-child{text-align:right}.danger-zone{display:flex;align-items:center;justify-content:space-between;gap:20px}.danger-zone h2{margin:0}.danger-zone p{margin:4px 0 0;color:var(--muted)}.danger-zone>div:last-child{display:flex;gap:10px;flex-wrap:wrap}
.prose{max-width:900px;margin:0 auto}.prose h2{color:var(--navy);margin-top:28px}.prose h2:first-child{margin-top:0}.prose p{font-size:17px;color:#40525e}
.toast{position:fixed;right:22px;bottom:22px;z-index:100;padding:13px 17px;border-radius:12px;background:var(--navy);color:#fff;box-shadow:var(--shadow);transform:translateY(120px);opacity:0;transition:.2s}.toast.show{transform:translateY(0);opacity:1}
.login-page{min-height:100vh;display:grid;place-items:center;padding:20px;background:linear-gradient(135deg,#0d3850,#1e6f96)}.login-card{width:min(420px,100%);background:#fff;border-radius:22px;padding:32px;box-shadow:0 25px 70px rgba(0,0,0,.25)}.login-card .brand{color:var(--navy)}.login-card .brand-mark{background:var(--navy);color:#fff}.login-card h1{text-align:center;color:var(--navy)}.login-card p{text-align:center;color:var(--muted)}.login-card form{display:flex;flex-direction:column;gap:15px;margin-top:20px}
@media(max-width:1000px){.main-nav{position:absolute;top:72px;left:0;right:0;display:none;flex-direction:column;align-items:stretch;padding:12px 20px;background:var(--navy);border-top:1px solid rgba(255,255,255,.12)}.main-nav.open{display:flex}.nav-toggle{display:block}.hero{grid-template-columns:1fr}.hero-compass{display:none}.feature-grid{grid-template-columns:repeat(2,1fr)}.filter-panel{grid-template-columns:repeat(2,1fr)}.audio-layout{grid-template-columns:1fr}.audio-settings{display:grid;grid-template-columns:repeat(2,1fr)}.audio-settings .button{grid-column:1/-1}.stats-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:700px){.page-shell{padding:22px 12px 48px}.topbar{padding:9px 14px}.hero{padding:28px 22px;border-radius:20px}.hero h1{font-size:36px}.hero p{font-size:16px}.stat-strip{grid-template-columns:repeat(2,1fr)}.feature-grid,.mnemonic-grid{grid-template-columns:1fr}.filter-panel,.filter-panel.compact,.exam-setup{grid-template-columns:1fr}.search-label{grid-column:auto}.question-body{padding:15px}.question-meta{align-items:flex-start;flex-direction:column}.answer-option{grid-template-columns:42px 1fr;padding:9px}.answer-letter{width:36px;height:36px}.exam-bar{top:76px;grid-template-columns:1fr auto}.exam-bar .button{grid-column:1/-1;width:100%}.exam-result-summary{grid-template-columns:1fr}.audio-settings{display:flex}.audio-player{min-height:430px}.audio-now h2{font-size:27px}.stats-grid{grid-template-columns:1fr 1fr}.bar-row{grid-template-columns:1fr}.bar-row strong{grid-row:1}.bar-row span:last-child{text-align:left}.danger-zone{align-items:flex-start;flex-direction:column}.data-table{font-size:13px}.site-footer{gap:12px}.question-actions{align-items:stretch}.question-actions .button{flex:1}}
@media(prefers-reduced-motion:reduce){*{animation-duration:.001ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition:none!important}}

/* v2: responsive, multi-user and administration */
html,body{max-width:100%;overflow-x:hidden}body *{min-width:0}textarea{font:inherit}input,select,textarea,button{max-width:100%}p,h1,h2,h3,td,th,label,small{overflow-wrap:anywhere}.page-shell{max-width:1480px}.topbar{padding-inline:max(18px,calc((100vw - 1480px)/2))}.main-nav{flex-wrap:nowrap}.main-nav .account-link{background:rgba(255,255,255,.13);max-width:190px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.page-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px}.page-heading h1{margin:4px 0 6px;color:var(--navy);font-size:clamp(30px,4vw,48px);line-height:1.08}.page-heading p{margin:0;max-width:900px;color:var(--muted);font-size:17px}.section-title{display:flex;justify-content:space-between;gap:16px;align-items:flex-start}.section-title h2{margin:3px 0 0;color:var(--navy)}.success-banner,.warning-banner,.error-banner{padding:14px 16px;border-radius:12px;margin:12px 0;font-weight:700}.success-banner{background:var(--green-2);color:#0d6847;border:1px solid #9ad5bd}.warning-banner{background:var(--amber-2);color:#79520b;border:1px solid #e9cf94}.error-banner{background:var(--red-2);color:#922d32;border:1px solid #efafb2}.settings-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:0 8px 28px rgba(13,56,80,.055)}.narrow-card{max-width:720px;margin:0 auto}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.form-grid.one-column{grid-template-columns:1fr}.form-grid label{display:flex;flex-direction:column;gap:7px;color:var(--navy);font-size:13px;font-weight:800}.form-grid input,.form-grid select,.form-grid textarea,.login-card input{width:100%;min-height:48px;border:1px solid #bdccd4;border-radius:11px;padding:10px 12px;background:#fff;color:var(--ink)}.form-grid textarea{min-height:96px;resize:vertical}.form-grid input:focus,.form-grid select:focus,.form-grid textarea:focus,.login-card input:focus{outline:3px solid rgba(30,111,150,.18);border-color:var(--blue)}.form-divider{grid-column:1/-1;border-top:1px solid var(--line);padding-top:17px;margin-top:4px}.form-divider h3{margin:0;color:var(--navy)}.form-divider p{margin:4px 0 0;color:var(--muted)}.form-actions{grid-column:1/-1;display:flex;gap:10px;flex-wrap:wrap}.check-row{flex-direction:row!important;align-items:center;color:var(--ink)!important;font-weight:700!important}.check-row input{width:22px!important;min-height:22px!important}.switch-row{grid-column:1/-1;display:grid!important;grid-template-columns:1fr auto;align-items:center;gap:16px;padding:14px;border:1px solid var(--line);border-radius:13px;background:#f8fbfc;color:var(--ink)!important}.switch-row span{display:block}.switch-row strong,.switch-row small{display:block}.switch-row small{margin-top:4px;color:var(--muted);font-weight:500}.switch-row input{appearance:none;width:54px!important;height:30px;min-height:30px!important;border:0!important;border-radius:999px;background:#b6c5cc;position:relative;padding:0!important;transition:.2s}.switch-row input:before{content:"";position:absolute;top:4px;left:4px;width:22px;height:22px;border-radius:50%;background:#fff;box-shadow:0 2px 7px rgba(0,0,0,.2);transition:.2s}.switch-row input:checked{background:var(--green)}.switch-row input:checked:before{transform:translateX(24px)}
.answer-option{min-height:68px;padding:13px 15px;gap:13px;touch-action:manipulation}.answer-letter{min-width:42px;width:42px;height:42px}.answer-text{font-size:clamp(15px,1.55vw,18px);line-height:1.45}.question-card,.official-image{max-width:100%}.question-body{overflow:hidden}.official-image{height:auto;object-fit:contain}.table-scroll,.table-wrap{width:100%;overflow:auto;-webkit-overflow-scrolling:touch}.data-table{min-width:720px}.data-table td small{display:block;color:var(--muted);margin-top:3px}.login-card .button{width:100%}.login-secondary{text-align:center;margin-bottom:0!important}.wide-login-card{width:min(540px,100%)}
.admin-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(280px,360px);gap:20px;align-items:start}.admin-side{display:grid;gap:18px;position:sticky;top:92px}.admin-settings-form{margin-top:18px}.full-width-card{margin-top:20px}.admin-note{margin:0}.admin-user-table{min-width:1150px}.action-stack{display:flex;gap:6px;flex-wrap:wrap}.action-stack form{margin:0}.mini-button{border:1px solid #b9cad3;background:#fff;color:var(--navy);border-radius:8px;padding:6px 9px;font-size:12px;font-weight:800;min-height:34px}.mini-button:hover{background:#eef5f7}.mini-button.warning{color:#7f580e;border-color:#dec585}.mini-button.danger{color:#982f34;border-color:#e4a4a8}.status-pill{display:inline-flex;border-radius:999px;padding:5px 9px;font-size:12px;font-weight:900}.status-pill.good{background:var(--green-2);color:#0d6847}.status-pill.bad{background:var(--red-2);color:#922d32}.ua-cell{max-width:320px}.admin-summary{margin-bottom:20px}
.video-filter{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}.chip-filter{border:1px solid #b9cad3;border-radius:999px;background:#fff;color:var(--navy);padding:9px 14px;font-weight:800}.chip-filter.active{background:var(--navy);border-color:var(--navy);color:#fff}.video-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.video-card{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:0 8px 26px rgba(13,56,80,.06)}.video-frame{position:relative;aspect-ratio:16/9;background:#0c1e28}.video-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.video-card-body{padding:19px}.video-card h2{font-size:21px;color:var(--navy);margin:4px 0 8px}.video-card p{margin:0 0 10px;color:var(--muted)}.video-card small{color:#75858e}
@media(max-width:1280px){.main-nav{position:absolute;top:72px;left:0;right:0;display:none;flex-direction:column;align-items:stretch;padding:12px 20px;background:var(--navy);border-top:1px solid rgba(255,255,255,.12);max-height:calc(100vh - 72px);overflow:auto}.main-nav.open{display:flex}.main-nav a{font-size:16px;padding:12px}.nav-toggle{display:block}.main-nav .account-link{max-width:none}.admin-layout{grid-template-columns:1fr}.admin-side{position:static;grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:820px){.page-shell{padding-inline:14px}.form-grid{grid-template-columns:1fr}.form-divider,.form-actions,.switch-row{grid-column:auto}.admin-side{grid-template-columns:1fr}.video-grid{grid-template-columns:1fr}.answer-option{min-height:72px}.page-heading{align-items:flex-start;flex-direction:column}.admin-heading .button{width:100%}}
@media(max-width:520px){.topbar{min-height:64px}.brand-mark{width:38px;height:38px}.brand strong{font-size:15px}.main-nav{top:64px;max-height:calc(100vh - 64px)}.page-shell{padding:20px 10px 44px}.hero{padding:24px 17px}.hero h1{font-size:32px}.question-body{padding:12px}.answer-option{grid-template-columns:40px minmax(0,1fr);padding:10px;min-height:76px}.answer-letter{width:38px;min-width:38px;height:38px}.stats-grid{grid-template-columns:1fr}.button{min-height:48px}.site-footer{flex-direction:column;align-items:center}.login-card{padding:24px 18px}.settings-card{padding:17px}.form-actions .button{width:100%}}

/* v2.1: verständliche Fehlererklärung nach falschen Antworten */
.answer-feedback.failure{padding:20px;background:#fff7f7;border-color:#e7a7aa}
.answer-feedback.failure>h3{color:#922d32;margin-bottom:14px}
.feedback-answer-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:12px 0 16px}
.feedback-choice{display:flex;flex-direction:column;gap:6px;padding:14px;border-radius:12px;border:1px solid var(--line);background:#fff}
.feedback-choice span,.review-label{font-size:12px;font-weight:900;text-transform:uppercase;letter-spacing:.04em}
.feedback-choice strong{font-size:15px;line-height:1.45}
.feedback-choice.selected-choice{border-color:#e5a0a4;background:var(--red-2)}
.feedback-choice.selected-choice span,.wrong-label{color:#9b3035}
.feedback-choice.correct-choice{border-color:#8dceb2;background:var(--green-2)}
.feedback-choice.correct-choice span,.correct-label{color:#0d6847}
.feedback-section{margin-top:13px;padding:14px 15px;border-radius:12px;background:#fff;border:1px solid #e1e8ec}
.feedback-section h4{margin:0 0 6px;color:var(--navy);font-size:16px}
.feedback-section p{margin:0;color:#344a57}
.feedback-section.next-time{border-color:#b8d4e2;background:#f2f8fb}
.feedback-memory{margin-top:13px;padding:14px 15px;border-radius:12px;background:var(--amber-2);border:1px solid #e5c985}
.feedback-memory strong{display:block;color:#76500b;margin-bottom:4px}
.feedback-memory p{margin:0;color:#654710}
.feedback-steps{margin:10px 0 0;padding-left:22px;color:#344a57}
.feedback-steps li+li{margin-top:5px}
.exam-learning-feedback{margin-top:14px}
.review-answer-images{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:12px}
.review-answer-images>div{padding:12px;border:1px solid var(--line);border-radius:12px;background:#f9fbfc}
.review-answer-images .official-image{margin:8px auto 0}
.review-label{display:inline-flex;margin-bottom:4px}
@media(max-width:700px){.feedback-answer-grid,.review-answer-images{grid-template-columns:1fr}.answer-feedback.failure{padding:15px}}

/* v2.2: lesbarer amtlicher Text, Originalgrafiken und robuste Bedienung */
.question-text{margin:0 0 18px;color:var(--navy);font-size:clamp(22px,2.4vw,31px);line-height:1.28;letter-spacing:-.012em}
.official-visual{display:flex;flex-direction:column;align-items:flex-start;gap:8px;width:fit-content;max-width:100%;margin:0 0 20px;padding:12px 14px;border:1px solid #d5e1e7;border-radius:13px;background:#fff;box-shadow:0 4px 15px rgba(13,56,80,.055)}
.official-visual-label{display:inline-flex;padding:4px 8px;border-radius:999px;background:#edf4f7;color:#48616f;font-size:11px;font-weight:900;text-transform:uppercase;letter-spacing:.045em}
.official-visual img{display:block;max-width:min(100%,720px);max-height:430px;width:auto;height:auto;object-fit:contain;background:#fff}
.answer-option{grid-template-columns:48px minmax(0,1fr);align-items:flex-start;padding:16px;cursor:pointer;user-select:none}
.answer-option:focus-visible{outline:4px solid rgba(30,111,150,.23);outline-offset:2px}
.answer-option .answer-letter{margin-top:1px}
.answer-content{display:flex;flex-direction:column;gap:11px;width:100%}
.answer-text{display:block;color:var(--ink);font-size:clamp(16px,1.5vw,19px);line-height:1.52;font-weight:650}
.answer-option .official-visual{margin:0;padding:9px 10px;pointer-events:none}
.answer-option .official-visual img{max-height:240px;max-width:100%}
.answer-option.selected{border-color:var(--blue)!important;background:#eaf5fb!important;box-shadow:0 0 0 3px rgba(30,111,150,.12)}
.answer-option.selected .answer-letter{background:var(--blue);color:#fff}
.answer-option.correct{box-shadow:0 0 0 3px rgba(22,130,93,.1)}
.answer-option.wrong{box-shadow:0 0 0 3px rgba(198,63,67,.1)}
.answer-check-row{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-top:18px;padding:14px 15px;border:1px solid #cfdee5;border-radius:13px;background:#f7fafb}
.answer-check-row .button{min-width:210px}
.sound-notation{margin:0 0 14px;padding:15px 16px;border:1px solid #c8d9e2;border-radius:14px;background:#f6fafc}
.sound-notation figcaption{color:var(--navy);font-size:13px;font-weight:900;text-transform:uppercase;letter-spacing:.045em}
.sound-notation small{display:block;margin-top:9px;color:var(--muted);font-size:12px}
.signal-track{display:flex;align-items:center;gap:9px;min-height:58px;margin-top:8px;padding:10px 12px;border-radius:10px;background:#fff;border:1px solid #dce6eb;overflow-x:auto}
.signal-token{display:inline-flex;flex:0 0 auto;align-items:center;justify-content:center;height:12px;border-radius:999px;background:#172630}
.signal-token.s{width:28px}.signal-token.l{width:95px}.signal-token.v{width:10px;height:10px}.signal-token.continuous{width:240px}.signal-token.bell,.signal-token.gong{width:48px;height:48px;background:#eef3f5;font-size:25px;border:2px solid #78909c}
.signal-pause{display:flex;align-items:center;justify-content:center;width:36px;height:38px;flex:0 0 36px}.signal-pause i{height:30px;border-left:2px dashed #91a3ad}
.sound-button{margin:0 0 18px!important}
.review-question-text{font-size:18px;font-weight:800;color:var(--navy)}
.review-answer-images p{margin:8px 0 0;line-height:1.5}
.review-answer-images .official-visual{margin-top:10px;margin-bottom:0}
.runtime-error{position:fixed;z-index:9999;right:16px;bottom:16px;display:grid;grid-template-columns:1fr auto;gap:5px 12px;max-width:min(560px,calc(100vw - 32px));padding:14px 15px;border:2px solid #c63f43;border-radius:14px;background:#fff7f7;color:#7f272b;box-shadow:0 18px 45px rgba(75,15,18,.24)}
.runtime-error strong,.runtime-error span{grid-column:1}.runtime-error button{grid-column:2;grid-row:1/3;align-self:center;border:0;border-radius:9px;background:#c63f43;color:#fff;padding:9px 12px;font-weight:900}
#examSetupError{grid-column:1/-1;margin:0}
@media(max-width:700px){.question-text{font-size:22px}.answer-option{grid-template-columns:42px minmax(0,1fr);padding:12px}.answer-check-row{align-items:stretch;flex-direction:column}.answer-check-row .button{width:100%;min-width:0}.official-visual{width:100%;align-items:center}.official-visual-label{align-self:flex-start}.signal-token.l{width:72px}.signal-token.continuous{width:180px}}

.audio-resume-hint {
  margin: 4px 0 0;
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(13, 56, 80, 0.07);
  line-height: 1.45;
}