/* SmartLingo — premium design system
   Deep-ink navy + teal accent, warm paper background, layered shadows, soft motion.
   Class names are shared with app.js / practice.js / mock.js — keep selectors stable. */
:root{
  --teal:#14b8a6;--teal-dark:#0f9488;--teal-deep:#0b6b63;--teal-soft:#e6f7f4;--teal-glow:rgba(20,184,166,.28);
  --navy:#0b1b2b;--ink:#17283a;--ink-2:#415467;--muted:#7c8a98;--line:#e6eaef;--line-2:#d6dde5;
  --bg:#f3f5f8;--card:#ffffff;--paper:#fbfcfd;
  --easy:#2fa36b;--medium:#d9950d;--hard:#e5484d;--amber:#e6a400;--blue:#2b6cb0;--red:#d93c3c;--brass:#b8934a;
  --radius:16px;--radius-sm:10px;--radius-xs:8px;
  --shadow:0 1px 2px rgba(11,27,43,.04),0 6px 20px -8px rgba(11,27,43,.10);
  --shadow-lg:0 2px 4px rgba(11,27,43,.05),0 24px 48px -16px rgba(11,27,43,.22);
  --ease:cubic-bezier(.2,.7,.2,1);
  --sidebar-w:272px;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","Helvetica Neue",Arial,sans-serif;color:var(--ink);background:var(--bg);font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
body::before{content:'';position:fixed;inset:0;z-index:-1;background:radial-gradient(900px 500px at 85% -10%,rgba(20,184,166,.10),transparent 60%),radial-gradient(700px 400px at -10% 110%,rgba(11,27,43,.06),transparent 60%)}
a{color:var(--teal-dark);text-decoration:none;transition:color .15s var(--ease)}
a:hover{color:var(--teal-deep)}
button{font:inherit;cursor:pointer}
input,select,textarea{font:inherit;color:inherit}
::selection{background:rgba(20,184,166,.25)}
:focus-visible{outline:2px solid var(--teal);outline-offset:2px;border-radius:6px}
h1,h2,h3{margin:0 0 .5rem;color:var(--navy);line-height:1.25;font-weight:600;letter-spacing:-.01em}
h1{font-family:Fraunces,Georgia,serif;font-weight:600;font-size:clamp(1.65rem,1.3rem + 1.2vw,2.15rem);letter-spacing:-.02em}
h2{font-size:1.15rem}h3{font-size:1rem;font-weight:600}
.underlined{position:relative;padding-bottom:.4rem}.underlined::after{content:'';position:absolute;left:0;bottom:0;width:48px;height:2px;background:var(--teal)}
.muted{color:var(--muted)}.small{font-size:.85rem}.right{text-align:right}.center{text-align:center}
.row{display:flex;gap:.75rem;align-items:center;flex-wrap:wrap}
.spread{display:flex;justify-content:space-between;align-items:center;gap:.75rem;flex-wrap:wrap}
.grid{display:grid;gap:1rem}
.grid.cols-2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.grid.cols-3{grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}
.grid.cols-4{grid-template-columns:repeat(auto-fit,minmax(160px,1fr))}

/* surfaces */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:1.25rem 1.4rem;box-shadow:var(--shadow);transition:box-shadow .25s var(--ease),transform .25s var(--ease),border-color .25s var(--ease)}
.card:hover{box-shadow:var(--shadow-lg);border-color:var(--line-2)}
.card.tight{padding:.85rem 1rem}
.stat{display:flex;flex-direction:column;gap:.15rem;position:relative;overflow:hidden}
.stat::after{content:'';position:absolute;right:-50px;top:-50px;width:150px;height:150px;border-radius:50%;background:radial-gradient(circle,rgba(20,184,166,.12),transparent 62%);pointer-events:none}
.stat b{font-size:1.85rem;color:var(--navy);font-weight:700;letter-spacing:-.03em;line-height:1.1}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.45rem;border:1px solid var(--line-2);background:#fff;color:var(--ink);padding:.55rem 1.05rem;border-radius:var(--radius-sm);font-weight:600;font-size:.9rem;line-height:1.35;transition:transform .15s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);box-shadow:0 1px 1px rgba(11,27,43,.04);white-space:nowrap}
.btn:hover{border-color:var(--teal);color:var(--teal-deep);box-shadow:0 4px 14px -6px rgba(11,27,43,.18);transform:translateY(-1px)}
.btn:active{transform:translateY(0) scale(.985);box-shadow:none}
.btn.primary{background:linear-gradient(180deg,#19c3b0,#0f9488);border-color:transparent;color:#fff;box-shadow:0 6px 18px -6px var(--teal-glow),inset 0 1px 0 rgba(255,255,255,.25)}
.btn.primary:hover{background:linear-gradient(180deg,#14b8a6,#0c8378);color:#fff;box-shadow:0 10px 24px -8px var(--teal-glow),inset 0 1px 0 rgba(255,255,255,.25)}
.btn.outline{border-color:var(--teal);color:var(--teal-deep);background:#fff}
.btn.pill{border-radius:999px}
.btn.danger{color:var(--red);border-color:#f3c3c3}
.btn.danger:hover{background:#fff4f4;border-color:var(--red);color:var(--red)}
.btn.ghost{border-color:transparent;background:transparent;box-shadow:none}
.btn.ghost:hover{background:rgba(11,27,43,.05);box-shadow:none;transform:none}
.btn.sm{padding:.36rem .7rem;font-size:.8rem;border-radius:var(--radius-xs)}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}
.btn.icon{padding:.45rem;border-radius:50%;width:38px;height:38px}

/* tags & badges */
.tag{display:inline-block;padding:0 .55rem;border-radius:999px;font-size:.72rem;font-weight:600;line-height:1.55rem;text-transform:capitalize;border:1px solid;letter-spacing:.01em}
.tag.easy{color:#1f7a4f;border-color:#bfe8d2;background:#eefaf3}
.tag.medium{color:#9a6700;border-color:#f3dfae;background:#fff8e6}
.tag.hard{color:#b42318;border-color:#f6c6c3;background:#fff1f0}
.tag.neutral{color:var(--ink-2);border-color:var(--line-2);background:#f7f9fb}
.tag.teal{color:var(--teal-deep);border-color:#b9e9e1;background:var(--teal-soft)}
.tag.blue{color:var(--blue);border-color:#c4dcf5;background:#ecf4fd}
.tag.exam{color:#fff;border-color:transparent;background:linear-gradient(135deg,#e5484d,#c93b40);text-transform:none}
.tag.predict{color:#3b2a00;border-color:transparent;background:linear-gradient(135deg,#f3c54d,#e0a600);text-transform:none}
.tag.guide{color:#fff;border-color:transparent;background:linear-gradient(135deg,#19c3b0,#0f9488);text-transform:none;cursor:pointer;padding:0 .75rem}
.badge{display:inline-flex;align-items:center;justify-content:center;min-width:1.45rem;height:1.45rem;padding:0 .45rem;border-radius:999px;background:#eef2f6;color:var(--muted);font-size:.72rem;font-weight:700;font-variant-numeric:tabular-nums}

/* forms */
input[type=text],input[type=password],input[type=email],input[type=number],input[type=search],input[type=date],input[type=tel],select,textarea{width:100%;border:1px solid var(--line-2);border-radius:var(--radius-sm);padding:.62rem .8rem;background:#fff;outline:none;transition:border-color .2s var(--ease),box-shadow .2s var(--ease);color:var(--ink)}
input:focus,select:focus,textarea:focus{border-color:var(--teal);box-shadow:0 0 0 4px rgba(20,184,166,.16)}
input::placeholder,textarea::placeholder{color:#a3aeb9}
textarea{min-height:120px;resize:vertical;line-height:1.65}
label.field{display:flex;flex-direction:column;gap:.35rem;font-size:.83rem;font-weight:600;color:var(--ink-2);letter-spacing:.01em}
label.field span.hint{font-weight:400;color:var(--muted)}
.field-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:.75rem}

/* tables */
table{width:100%;border-collapse:collapse;font-size:.9rem}
th,td{padding:.7rem .75rem;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle}
tr:last-child td{border-bottom:0}
th{font-size:.72rem;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);font-weight:700;background:var(--paper)}
tr.clickable{cursor:pointer}tr.clickable:hover td{background:#f6f9fb}
.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:var(--radius-sm);background:#fff}

/* toast */
.toast{position:fixed;top:1.1rem;bottom:auto;left:50%;transform:translateX(-50%);background:var(--navy);color:#fff;padding:.75rem 1.15rem;border-radius:12px;font-size:.9rem;box-shadow:0 18px 40px -12px rgba(11,27,43,.5);z-index:1000;max-width:90vw;animation:toast-in .35s var(--ease)}
.toast.error{background:var(--red)}
.toast.ok{background:var(--teal-deep)}
@keyframes toast-in{from{opacity:0;transform:translate(-50%,-8px)}to{opacity:1;transform:translate(-50%,0)}}

/* layout */
.shell{display:grid;grid-template-columns:var(--sidebar-w) 1fr;min-height:100vh}
.sidebar{background:linear-gradient(180deg,#0b1b2b 0%,#0e2436 60%,#0f2a3c 100%);color:#dfe7ee;padding:1.1rem .9rem 1.5rem;position:sticky;top:0;height:100vh;overflow:auto;scrollbar-width:thin;scrollbar-color:rgba(255,255,255,.18) transparent}
.sidebar::-webkit-scrollbar{width:6px}.sidebar::-webkit-scrollbar-thumb{background:rgba(255,255,255,.18);border-radius:999px}
.brand{display:flex;align-items:center;gap:.65rem;padding:.3rem .5rem 1rem;font-weight:700;color:#fff;font-size:1.15rem;letter-spacing:-.01em}
.brand img{width:36px;height:36px;border-radius:11px;box-shadow:0 6px 16px -6px rgba(20,184,166,.6)}
.brand small{display:block;font-size:.66rem;color:rgba(223,231,238,.6);font-weight:600;letter-spacing:.12em}
.nav-group{margin-top:.9rem}
.nav-group>.title{font-size:.66rem;text-transform:uppercase;letter-spacing:.12em;color:rgba(223,231,238,.45);font-weight:700;padding:.35rem .6rem}
.nav a{display:flex;align-items:center;justify-content:space-between;gap:.5rem;padding:.5rem .7rem;border-radius:10px;color:rgba(223,231,238,.82);font-weight:500;font-size:.9rem;transition:background .18s var(--ease),color .18s var(--ease),transform .18s var(--ease);position:relative}
.nav a:hover{background:rgba(255,255,255,.07);color:#fff}
.nav a.active{background:linear-gradient(90deg,rgba(20,184,166,.22),rgba(20,184,166,.08));color:#fff;font-weight:600;box-shadow:inset 3px 0 0 var(--teal)}
.nav a .badge{background:rgba(255,255,255,.08);color:rgba(223,231,238,.7)}
.nav a.active .badge{background:rgba(20,184,166,.3);color:#e9fffb}
.main{min-width:0;display:flex;flex-direction:column}
.topbar>.row{flex-wrap:nowrap}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:0 1.5rem;min-height:66px;background:rgba(243,245,248,.78);backdrop-filter:saturate(160%) blur(14px);-webkit-backdrop-filter:saturate(160%) blur(14px);border-bottom:1px solid rgba(11,27,43,.06);position:sticky;top:0;z-index:30}
.content{padding:1.75rem 1.75rem 3rem;max-width:1200px;width:100%;margin:0 auto;animation:page-in .4s var(--ease)}
@keyframes page-in{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.seg{display:inline-flex;border:1px solid var(--line-2);border-radius:999px;overflow:hidden;background:#fff;padding:3px;gap:2px;box-shadow:inset 0 1px 2px rgba(11,27,43,.05)}
.seg button{border:0;background:transparent;padding:.36rem .95rem;white-space:nowrap;font-weight:600;font-size:.82rem;color:var(--ink-2);border-radius:999px;transition:background .2s var(--ease),color .2s var(--ease)}
.seg button.active{background:var(--navy);color:#fff;box-shadow:0 4px 12px -6px rgba(11,27,43,.6)}
.avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,#19c3b0,#0b6b63);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:.85rem;box-shadow:0 4px 12px -4px var(--teal-glow)}
.menu{position:relative}
.menu .dropdown{position:absolute;right:0;top:calc(100% + .5rem);background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-lg);min-width:230px;padding:.45rem;z-index:40;animation:page-in .2s var(--ease)}
.menu .dropdown a,.menu .dropdown button{display:block;width:100%;text-align:left;padding:.55rem .75rem;border:0;background:none;border-radius:9px;font-size:.9rem;color:var(--ink)}
.menu .dropdown a:hover,.menu .dropdown button:hover{background:#f3f6f9}
.hamburger{display:none}

/* login */
.login-wrap{min-height:100vh;display:grid;place-items:center;padding:1.25rem;background:radial-gradient(1200px 600px at 20% 0%,rgba(20,184,166,.35),transparent 55%),radial-gradient(900px 500px at 90% 100%,rgba(20,184,166,.18),transparent 55%),linear-gradient(160deg,#0b1b2b 0%,#10283a 55%,#0b1b2b 100%);position:relative;overflow:hidden}
.login-wrap::before{content:'';position:absolute;inset:-40%;background:conic-gradient(from 180deg at 50% 50%,transparent 0 60%,rgba(255,255,255,.05) 70%,transparent 80%);animation:spin 40s linear infinite;pointer-events:none}
@keyframes spin{to{transform:rotate(360deg)}}
.login-card{width:100%;max-width:440px;background:rgba(255,255,255,.96);border-radius:22px;padding:2.4rem 2.2rem 2rem;box-shadow:0 40px 90px -30px rgba(0,0,0,.55),0 0 0 1px rgba(255,255,255,.35);border:1px solid rgba(255,255,255,.6);position:relative;animation:page-in .5s var(--ease);backdrop-filter:blur(8px)}
.login-card .brand{justify-content:center;font-size:1.5rem;padding-bottom:.4rem;color:var(--navy)}
.login-card .brand small{color:var(--muted)}
.login-card form{display:flex;flex-direction:column;gap:1rem;margin-top:1.1rem}
.login-card .btn.primary{padding:.8rem;font-size:1rem;border-radius:12px}

/* alerts */
.alert{padding:.8rem 1rem;border-radius:12px;font-size:.88rem;border:1px solid}
.alert.error{background:#fff4f4;border-color:#f6c6c3;color:#9b1c1c}
.alert.info{background:#eef5fd;border-color:#cfe1f7;color:#1f3f6b}
.alert.ok{background:#eefaf3;border-color:#bfe8d2;color:#1b5e3a}
.alert.warn{background:#fff8e6;border-color:#f3dfae;color:#7a5200}

/* question list */
.list-toolbar{display:flex;gap:.6rem;align-items:center;flex-wrap:wrap;margin-bottom:1rem}
.list-toolbar input[type=search]{max-width:300px}
.qlist{display:flex;flex-direction:column;gap:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.qitem{display:grid;grid-template-columns:3.6rem 1fr auto;gap:.75rem;align-items:center;padding:.9rem 1.1rem;background:#fff;border:0;border-bottom:1px solid var(--line);cursor:pointer;transition:background .15s var(--ease);text-align:left;width:100%}
.qitem:last-child{border-bottom:0}
.qitem:hover{background:#f6fbfa}
.qitem .num{font-weight:700;color:var(--teal-dark);font-size:.86rem;font-variant-numeric:tabular-nums}
.qitem .title{font-weight:500;color:var(--ink);display:flex;gap:.5rem;align-items:center;flex-wrap:wrap}
.qitem .meta{display:flex;gap:.5rem;align-items:center;font-size:.8rem;color:var(--muted)}
.dot{width:9px;height:9px;border-radius:50%;display:inline-block;background:#dde3ea}
.dot.done{background:var(--teal);box-shadow:0 0 0 3px rgba(20,184,166,.18)}
.dot.partial{background:var(--amber);box-shadow:0 0 0 3px rgba(230,164,0,.18)}
.pager{display:flex;gap:.4rem;justify-content:flex-end;margin-top:1rem;flex-wrap:wrap}
.pager .btn{min-width:2.3rem;justify-content:center;padding:.3rem .5rem}

/* practice */
.practice-head{display:flex;justify-content:space-between;align-items:flex-start;gap:1rem;flex-wrap:wrap;margin-bottom:1.1rem}
.practice-head h1{display:flex;align-items:center;gap:.6rem;flex-wrap:wrap}
.instructions{font-size:.92rem;color:var(--ink-2);background:#fff;border:1px solid var(--line);border-left:3px solid var(--teal);padding:.75rem 1rem;border-radius:12px;margin-bottom:1.1rem;box-shadow:var(--shadow)}
.q-title{display:flex;align-items:center;gap:.6rem;flex-wrap:wrap;font-size:1.1rem;font-weight:600;color:var(--ink);margin:.2rem 0 .9rem}
.q-title .num{color:var(--teal-dark);font-variant-numeric:tabular-nums}
.timer{font-variant-numeric:tabular-nums;font-weight:700;color:var(--navy);background:#fff;border:1px solid var(--line-2);padding:.3rem .8rem;border-radius:999px;box-shadow:var(--shadow)}
.timer.warn{color:var(--hard);border-color:#f6c6c3;background:#fff6f6;animation:pulse 1.2s infinite}
.passage{font-size:1.06rem;line-height:1.95;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.4rem 1.6rem;box-shadow:var(--shadow)}
.passage.serif{font-family:Georgia,"Times New Roman",serif}
.blank-select{display:inline-block;min-width:8rem;margin:0 .15rem;padding:.2rem .5rem;border:1px solid var(--line-2);border-radius:8px;background:var(--paper);width:auto;vertical-align:baseline;font-size:.95rem}
.blank-select.correct,.drop.correct,.blank-input.correct{border-color:var(--easy);background:#eefaf3}
.blank-select.wrong,.drop.wrong,.blank-input.wrong{border-color:var(--hard);background:#fff1f0}
input.blank-input{display:inline-block;width:9rem;margin:0 .15rem;padding:.2rem .5rem;border:1px solid var(--line-2);border-radius:8px;vertical-align:baseline;font-size:.95rem}
.drop{display:inline-flex;align-items:center;justify-content:center;min-width:8rem;height:2.1rem;margin:0 .2rem;border:1.5px dashed #9fb0c0;border-radius:8px;background:var(--paper);vertical-align:middle;font-size:.95rem;padding:0 .6rem;cursor:pointer;transition:all .15s var(--ease)}
.drop:hover{border-color:var(--teal)}
.drop.filled{border-style:solid;border-color:var(--teal);background:var(--teal-soft);font-weight:600}
.wordbank{display:flex;gap:.5rem;flex-wrap:wrap;padding:1rem;background:#fff;border:1px solid var(--line);border-radius:var(--radius);margin-top:1rem;min-height:3.5rem;box-shadow:var(--shadow)}
.chip{padding:.4rem .9rem;border:1px solid var(--line-2);border-radius:999px;background:#fff;font-weight:600;cursor:grab;user-select:none;transition:all .15s var(--ease);box-shadow:0 1px 1px rgba(11,27,43,.04)}
.chip:hover{border-color:var(--teal);transform:translateY(-1px)}
.chip.used{opacity:.35;cursor:default;transform:none}
.chip.selected{border-color:var(--teal);background:var(--teal-soft)}
.answer-key{margin-top:1rem}
.answer-key .k,.feedback .k{display:inline-block;margin:.2rem .3rem .2rem 0;padding:.25rem .65rem;border-radius:8px;background:#eefaf3;border:1px solid #bfe8d2;color:#1b5e3a;font-weight:600;font-size:.9rem}
.ro-wrap{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.ro-col{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:.9rem;min-height:220px;box-shadow:var(--shadow)}
.ro-col h3{font-size:.74rem;text-transform:uppercase;letter-spacing:.1em;color:var(--muted)}
.ro-item{padding:.75rem .9rem;border:1px solid var(--line);border-radius:12px;background:var(--paper);margin-bottom:.5rem;cursor:pointer;display:flex;gap:.6rem;align-items:flex-start;line-height:1.5;transition:all .15s var(--ease)}
.ro-item:hover{border-color:var(--teal);transform:translateY(-1px);box-shadow:var(--shadow)}
.ro-item.selected{border-color:var(--teal);background:var(--teal-soft)}
.ro-item .n{font-weight:800;color:var(--teal-dark);min-width:1.3rem}
.ro-item.correct{border-color:var(--easy);background:#eefaf3}
.ro-item.wrong{border-color:var(--hard);background:#fff1f0}
.audio-box{display:flex;align-items:center;gap:.9rem;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1rem 1.2rem;flex-wrap:wrap;box-shadow:var(--shadow)}
.audio-box .bar{flex:1;height:6px;background:#e9edf1;border-radius:999px;overflow:hidden;min-width:120px}
.audio-box .bar i{display:block;height:100%;background:linear-gradient(90deg,var(--teal),var(--teal-dark));width:0%;transition:width .2s linear}
.audio-box .status{font-size:.85rem;color:var(--muted);min-width:7rem}
.recorder{display:flex;align-items:center;gap:.9rem;flex-wrap:wrap;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.05rem 1.2rem;margin-top:1rem;box-shadow:var(--shadow)}
.rec-dot{width:12px;height:12px;border-radius:50%;background:#cbd5df}
.rec-dot.live{background:var(--red);animation:pulse 1s infinite;box-shadow:0 0 0 4px rgba(217,60,60,.18)}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
.feedback{margin-top:1rem;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.1rem 1.3rem;box-shadow:var(--shadow);animation:page-in .35s var(--ease)}
.score-pill{display:inline-flex;align-items:baseline;gap:.3rem;padding:.4rem 1rem;border-radius:999px;background:linear-gradient(135deg,var(--teal-soft),#d7f3ee);color:var(--teal-deep);font-weight:800;font-size:1.1rem;letter-spacing:-.01em}
.score-pill small{font-weight:600;font-size:.8rem}
.diff-word{padding:.05rem .2rem;border-radius:4px}
.diff-word.ok{background:#dcf5e7}
.diff-word.miss{background:#fde2e2;text-decoration:line-through}
.diff-word.extra{background:#fdf0c7}
.hiw-word{cursor:pointer;padding:.05rem .15rem;border-radius:4px;transition:background .12s}
.hiw-word:hover{background:#eef2f6}
.hiw-word.sel{background:#fde68a}
.hiw-word.ok{background:#bfe8d2}
.hiw-word.wrong{background:#f6c6c3}
.hiw-word.missed{outline:2px dashed var(--hard)}
.option{display:flex;gap:.75rem;align-items:flex-start;padding:.8rem 1rem;border:1px solid var(--line);border-radius:12px;background:#fff;margin-bottom:.5rem;cursor:pointer;transition:all .15s var(--ease)}
.option:hover{border-color:var(--teal);box-shadow:var(--shadow);transform:translateY(-1px)}
.option.sel{border-color:var(--teal);background:var(--teal-soft)}
.option.correct{border-color:var(--easy);background:#eefaf3}
.option.wrong{border-color:var(--hard);background:#fff1f0}
.wc{font-size:.85rem;color:var(--muted)}
.wc.bad{color:var(--hard);font-weight:600}
.attempt-list{font-size:.85rem}
.attempt-list li{display:flex;justify-content:space-between;gap:.5rem;padding:.35rem 0;border-bottom:1px dashed var(--line)}
.progress-bar{height:8px;background:#e6eaef;border-radius:999px;overflow:hidden}
.progress-bar i{display:block;height:100%;background:linear-gradient(90deg,var(--teal),var(--teal-dark));border-radius:999px;transition:width .5s var(--ease)}
.heat{display:grid;grid-template-columns:repeat(30,1fr);gap:3px}
.heat i{aspect-ratio:1;border-radius:3px;background:#e6eaef}
.heat i.l1{background:#a8e8de}.heat i.l2{background:#5fd0c0}.heat i.l3{background:var(--teal)}.heat i.l4{background:var(--teal-deep)}

/* modal */
.modal-backdrop{position:fixed;inset:0;background:rgba(11,27,43,.55);display:grid;place-items:center;z-index:100;padding:1rem;backdrop-filter:blur(4px);animation:fade .2s var(--ease)}
@keyframes fade{from{opacity:0}to{opacity:1}}
.modal{background:#fff;border-radius:18px;max-width:640px;width:100%;max-height:92vh;overflow:auto;padding:1.6rem;box-shadow:var(--shadow-lg);animation:page-in .3s var(--ease)}
.modal.wide{max-width:900px}
.modal h2{margin-bottom:1rem}
.modal form{display:flex;flex-direction:column;gap:.85rem}
.cred-box{background:var(--navy);color:#fff;padding:1rem 1.1rem;border-radius:12px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.95rem;line-height:1.8}
.lock-overlay{position:fixed;inset:0;background:rgba(255,255,255,.96);display:grid;place-items:center;z-index:500;text-align:center;padding:2rem;backdrop-filter:blur(6px)}
.kbd{font-family:ui-monospace,monospace;background:#eef2f6;padding:.1rem .35rem;border-radius:4px;font-size:.85em}
pre.code{background:var(--navy);color:#e2e8f0;padding:1rem;border-radius:12px;overflow:auto;font-size:.8rem;line-height:1.5}
.template-body{white-space:pre-wrap;line-height:1.8;font-size:.98rem}
.empty{padding:3rem 1rem;text-align:center;color:var(--muted)}
.image-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1rem;text-align:center;box-shadow:var(--shadow)}
.image-box img{max-width:100%;max-height:420px;border-radius:12px}

/* admin content tabs */
.type-tabs{display:flex;flex-direction:column;gap:.4rem;margin:1rem 0 0}
.type-group{display:flex;align-items:center;gap:.35rem;flex-wrap:wrap}
.type-group>.small{min-width:70px;font-weight:600}
.type-group .pill{display:inline-flex;align-items:center;gap:.15rem;padding:.3rem .7rem;border:1px solid var(--line-2);border-radius:999px;background:#fff;color:inherit;text-decoration:none;font-size:.8rem;transition:all .15s var(--ease)}
.type-group .pill:hover{border-color:var(--teal)}
.type-group .pill small{color:var(--muted)}
.type-group .pill.active{background:var(--navy);border-color:var(--navy);color:#fff}
.type-group .pill.active small{color:#b9e9e1}
.online-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:#16a34a;margin-left:.4rem;vertical-align:middle;box-shadow:0 0 0 3px #dcfce7}

/* password show/hide */
.pw-wrap{position:relative;display:flex;align-items:center}
.pw-wrap input{flex:1;padding-right:4.2rem}
.pw-toggle{position:absolute;right:.4rem;top:50%;transform:translateY(-50%);border:0;background:transparent;color:var(--teal-dark);font-weight:600;font-size:.8rem;cursor:pointer;padding:.3rem .5rem;border-radius:6px}
.pw-toggle:hover,.pw-toggle:focus-visible{background:rgba(15,148,136,.1);outline:none}

/* Answer toggle switch */
.btn.toggle{gap:.5rem;border-color:transparent;background:transparent;padding-left:.3rem;box-shadow:none}
.btn.toggle:hover{color:var(--ink);transform:none;box-shadow:none}
.switch{width:40px;height:22px;border-radius:999px;background:#cbd5df;position:relative;transition:.2s var(--ease);display:inline-block}
.switch::after{content:'';position:absolute;top:2px;left:2px;width:18px;height:18px;border-radius:50%;background:#fff;transition:.2s var(--ease);box-shadow:0 1px 3px rgba(0,0,0,.25)}
.btn.toggle[aria-pressed="true"] .switch{background:var(--teal)}
.btn.toggle[aria-pressed="true"] .switch::after{left:20px}

/* ---- mock tests ---- */
.mock-card{position:relative;overflow:hidden}
.mock-card::before{content:'';position:absolute;left:0;top:0;bottom:0;width:4px;background:linear-gradient(180deg,var(--teal),var(--teal-deep))}
.mock-sections{display:grid;gap:.6rem;grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}
.mock-section{display:flex;flex-direction:column;gap:.15rem;padding:.7rem .85rem;border:1px solid var(--line);border-radius:12px;background:var(--paper)}
.mock-actions{display:flex;flex-direction:column;gap:.6rem;align-items:stretch;min-width:190px}
.stat-mini{display:flex;flex-direction:column;align-items:center;padding:.55rem;border:1px dashed var(--line-2);border-radius:12px;background:var(--paper)}
.stat-mini b{font-size:1.45rem;color:var(--navy);letter-spacing:-.02em}
.mock-bar{display:flex;justify-content:space-between;align-items:center;gap:.75rem;flex-wrap:wrap;padding:.65rem 1rem;border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.9);backdrop-filter:blur(10px);position:sticky;top:76px;z-index:20;box-shadow:var(--shadow)}
.mock-progress{height:6px;background:#e6eaef;border-radius:999px;margin:.7rem 0 1.1rem;overflow:hidden}
.mock-progress i{display:block;height:100%;background:linear-gradient(90deg,var(--teal),var(--teal-dark));border-radius:999px;transition:width .5s var(--ease)}
.mock-clock{font-variant-numeric:tabular-nums;font-weight:700}
.mock-intro{max-width:760px;margin:1rem auto}
.mock-types{list-style:none;padding:0;margin:1rem 0;display:grid;gap:.6rem}
.mock-types li{padding:.7rem .9rem;border:1px solid var(--line);border-radius:12px;background:var(--paper)}

/* motion preferences */
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* responsive */
@media (max-width:900px){
  .shell{grid-template-columns:1fr}
  .sidebar{position:fixed;left:0;top:0;bottom:0;width:min(84vw,300px);transform:translateX(-100%);transition:transform .32s var(--ease),box-shadow .32s var(--ease);z-index:50;height:100vh;height:100dvh;border-radius:0 22px 22px 0}
  .sidebar.open{transform:none;box-shadow:0 0 0 100vw rgba(11,27,43,.55),0 30px 60px -20px rgba(0,0,0,.5)}
  .hamburger{display:inline-flex}
  .topbar{padding:0 1rem;min-height:60px}
  .content{padding:1.1rem 1rem 3rem}
  .card{padding:1rem 1.05rem}
  .passage{padding:1.1rem 1.15rem;font-size:1rem}
  .ro-wrap{grid-template-columns:1fr}
  .qitem{grid-template-columns:2.6rem 1fr;padding:.85rem .9rem}
  .qitem .meta{grid-column:2}
  .heat{grid-template-columns:repeat(15,1fr)}
  .btn{min-height:40px}
  .btn.sm{min-height:34px}
  .mock-bar{top:66px}
}
@media (max-width:640px){
  .mock-actions{min-width:0;width:100%}
  .mock-bar{position:static}
  .grid.cols-4{grid-template-columns:1fr 1fr}
  .stat b{font-size:1.5rem}
  .login-card{padding:1.9rem 1.4rem 1.6rem;border-radius:18px}
  .seg button{padding:.32rem .6rem;font-size:.76rem}
  .menu>.btn .small{display:none}
  .menu>.btn{padding:.2rem}
}

/* ---------- sign-up, preview & enrolment ---------- */
.signup-cta{display:flex;align-items:center;justify-content:space-between;gap:.6rem;margin-top:.6rem;padding:.8rem 1rem;border-radius:14px;background:linear-gradient(135deg,#f0fbf9,#f7fafc);border:1px solid #d6efea;font-size:.9rem;color:var(--navy)}
.signup-cta .btn{white-space:nowrap}
.login-card .stack{display:flex;flex-direction:column;gap:.75rem}
.login-card .field .hint{font-weight:400;color:var(--muted)}
.preview-banner{display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;padding:1.1rem 1.3rem;border-radius:var(--radius);background:linear-gradient(120deg,var(--navy) 0%,#123a52 55%,var(--teal-deep,#0f766e) 100%);color:#fff;box-shadow:0 20px 50px -28px rgba(11,27,43,.7)}
.preview-banner b{color:#fff}
.preview-banner .btn.ghost{color:#fff;border-color:rgba(255,255,255,.35)}
.preview-banner .btn.ghost:hover{background:rgba(255,255,255,.1)}
.sidebar .nav a.unlock-link{background:linear-gradient(90deg,rgba(20,184,166,.25),transparent);color:#fff;font-weight:700}
.qitem.locked{opacity:.72;background:#fbfcfd}
.qitem.locked .num{color:var(--muted);font-size:1rem}
.qitem.locked:hover{opacity:1;background:#f6fbfa}
.paywall,.paywall-card{text-align:center}
.paywall-card{max-width:560px;margin:2rem auto;padding:2.4rem 2rem}
.paywall-card .row{justify-content:center;margin-top:1rem}
.paywall-icon{font-size:2.4rem;line-height:1;margin:0 auto .6rem;width:4.4rem;height:4.4rem;display:grid;place-items:center;border-radius:50%;background:linear-gradient(135deg,#e6f7f4,#f3f7fb);box-shadow:inset 0 0 0 1px #d6efea}
.unlock-hero{text-align:center;max-width:720px;margin:0 auto 1.6rem}
.unlock-hero .eyebrow{display:inline-block;font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;font-weight:700;color:var(--teal-dark);margin-bottom:.4rem}
.unlock-hero h1{margin:0 0 .4rem;font-size:clamp(1.8rem,3.4vw,2.6rem)}
.unlock-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:1.25rem;align-items:start;max-width:1040px;margin:0 auto}
.perks{list-style:none;padding:0;margin:0}
.perks li{padding:.55rem 0 .55rem 1.9rem;position:relative;border-bottom:1px dashed var(--line)}
.perks li:last-child{border-bottom:0}
.perks li::before{content:"✓";position:absolute;left:.2rem;top:.45rem;width:1.25rem;height:1.25rem;border-radius:50%;background:var(--teal);color:#fff;font-size:.72rem;font-weight:800;display:grid;place-items:center}
.price-card{background:linear-gradient(160deg,#fff,#f4fbf9);border:1px solid #cfeee8}
.price-card hr{border:0;border-top:1px solid var(--line);margin:.7rem 0}
.price-card .total{font-size:1.2rem}
.price-card .total b{font-size:1.6rem;color:var(--navy);font-family:Fraunces,Georgia,serif}
.pay-card{margin-top:1rem}
#card-container{margin:.4rem 0 .8rem}
.tax-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:.6rem .9rem}
.tax-grid .field input{max-width:none}
@media (max-width:900px){.unlock-grid{grid-template-columns:1fr}.preview-banner{flex-direction:column;align-items:stretch}.preview-banner .row{justify-content:stretch}.preview-banner .row .btn{flex:1;justify-content:center}}

/* ---------- secure checkout ---------- */
.pay-card{position:relative;overflow:hidden}
.pay-card::before{content:'';position:absolute;inset:0 0 auto 0;height:4px;background:linear-gradient(90deg,var(--teal),#0b6b63 60%,var(--navy))}
.trust{display:flex;flex-direction:column;gap:.55rem;padding:.9rem 1rem;margin:0 0 1rem;border-radius:var(--radius-sm);background:linear-gradient(160deg,#f7fbfa,#f1f6f9);border:1px solid #dcebe8}
.trust-row{display:flex;flex-wrap:wrap;align-items:center;gap:.45rem .8rem}
.trust-badge{display:inline-flex;align-items:center;gap:.35rem;font-size:.74rem;font-weight:700;letter-spacing:.02em;color:var(--teal-deep);background:#fff;border:1px solid #cfe9e3;border-radius:999px;padding:.22rem .6rem;box-shadow:0 1px 1px rgba(11,27,43,.04)}
.lock-ico{width:.8rem;height:.95rem;display:inline-block;position:relative;flex:none}
.lock-ico::before{content:'';position:absolute;left:.12rem;top:0;width:.5rem;height:.5rem;border:2px solid currentColor;border-bottom:0;border-radius:.4rem .4rem 0 0;box-sizing:border-box}
.lock-ico::after{content:'';position:absolute;left:0;bottom:0;width:.8rem;height:.55rem;background:currentColor;border-radius:2px}
.lock-ico.light{color:#fff}
.pm-brand{display:inline-grid;place-items:center;height:28px;width:46px;padding:3px 6px;background:#fff;border:1px solid var(--line);border-radius:7px;box-shadow:0 1px 1px rgba(11,27,43,.04)}
.pm-brand svg{width:100%;height:100%}
.pm-brand.wide{width:66px}
.pm-brand.square{width:auto;height:26px;border:0;background:transparent;box-shadow:none;padding:0}
.trust-row.brands{gap:.4rem}
.trust-row.powered{gap:.6rem;align-items:center}
.trust-row.powered::before{content:'Powered by';font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.12em;color:var(--muted)}
.wallets{display:grid;gap:.6rem;margin:0 0 .4rem}
.wallet-btn{height:46px;border-radius:12px;border:0;display:grid;place-items:center;cursor:pointer;transition:transform .15s var(--ease),box-shadow .2s var(--ease)}
.wallet-btn.apple{background:#000;color:#fff}
.wallet-btn.apple svg{height:24px;width:auto;filter:invert(1)}
.wallet-btn:hover{transform:translateY(-1px);box-shadow:0 8px 20px -8px rgba(11,27,43,.4)}
.gpay-holder{background:transparent;padding:0;overflow:hidden}
.gpay-holder>*{width:100%}
.or{display:flex;align-items:center;gap:.8rem;margin:.6rem 0 .9rem;color:var(--muted);font-size:.78rem;text-transform:uppercase;letter-spacing:.1em;font-weight:700}
.or::before,.or::after{content:'';flex:1;height:1px;background:var(--line)}
.sq-card{min-height:92px;margin-top:.3rem}
.check{display:flex;gap:.6rem;align-items:flex-start;font-size:.9rem;margin:.4rem 0 .8rem;cursor:pointer}
.check input{margin-top:.3rem;accent-color:var(--teal-dark);width:1rem;height:1rem;flex:none}
.pay-btn{width:100%;justify-content:center;padding:.85rem 1rem;font-size:1rem;border-radius:12px;letter-spacing:.01em}
.steps{list-style:none;margin:.2rem 0 .8rem;padding:.6rem .8rem;display:grid;grid-template-columns:repeat(4,1fr);gap:.4rem;background:#f7f9fb;border-radius:var(--radius-sm);border:1px solid var(--line)}
.steps li{display:flex;flex-direction:column;align-items:center;gap:.3rem;font-size:.7rem;text-align:center;color:var(--muted);font-weight:600;position:relative}
.steps li .dot{width:.9rem;height:.9rem;border-radius:50%;border:2px solid var(--line-2);background:#fff;transition:all .3s var(--ease)}
.steps li.active{color:var(--teal-deep)}
.steps li.active .dot{border-color:var(--teal);box-shadow:0 0 0 4px var(--teal-glow);animation:pulse 1.1s infinite}
.steps li.done{color:var(--teal-deep)}
.steps li.done .dot{background:var(--teal);border-color:var(--teal)}
@keyframes pulse{0%{box-shadow:0 0 0 0 var(--teal-glow)}70%{box-shadow:0 0 0 7px rgba(20,184,166,0)}100%{box-shadow:0 0 0 0 rgba(20,184,166,0)}}
.result{padding:.6rem .2rem;animation:fadeUp .35s var(--ease)}
.result .paywall-icon{font-size:1.9rem;font-weight:800}
.result.ok .paywall-icon{background:linear-gradient(135deg,#19c3b0,#0f9488);color:#fff;box-shadow:0 10px 24px -10px var(--teal-glow)}
.result.bad .paywall-icon{background:#fff1f0;color:#b42318;box-shadow:inset 0 0 0 1px #f6c6c3}
.receipt-grid{display:grid;grid-template-columns:1fr auto;gap:.3rem 1.2rem;text-align:left;width:100%;max-width:360px;margin:.4rem auto;padding:.8rem 1rem;border-radius:var(--radius-sm);background:#f7f9fb;border:1px solid var(--line);font-size:.9rem}
.receipt-grid b{text-align:right;font-weight:600}
.receipt-grid .tot{font-weight:800;color:var(--navy);border-top:1px solid var(--line-2);padding-top:.35rem;margin-top:.15rem;font-size:1rem}
.spinner{width:2.6rem;height:2.6rem;border-radius:50%;border:3px solid var(--teal-soft);border-top-color:var(--teal);margin:0 auto .4rem;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes fadeUp{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.pay-links{display:flex;flex-direction:column;gap:.15rem;font-size:.85rem}
@media (max-width:600px){.steps{grid-template-columns:repeat(2,1fr)}.trust{padding:.7rem .75rem}.pm-brand{width:40px;height:26px}.pm-brand.wide{width:58px}}
.steps[hidden],.wallets[hidden],.or[hidden]{display:none}

.tag.priority{color:#fff;border-color:transparent;background:linear-gradient(135deg,#0f766e,#14b8a6);text-transform:none;font-weight:700}
.seg button.priority{font-weight:700}
.seg button.priority.active{background:linear-gradient(135deg,#0f766e,#14b8a6);color:#fff}
.priority-strip{display:flex;align-items:center;gap:.6rem;flex-wrap:wrap;margin:0 0 .8rem;padding:.6rem .8rem;border-radius:12px;background:linear-gradient(135deg,rgba(20,184,166,.12),rgba(15,118,110,.06));border:1px solid rgba(20,184,166,.3);font-size:.92rem}
.priority-strip a{font-weight:600}
.res-link{display:inline-block;margin:.2rem 0;padding:.25rem .6rem;border-radius:8px;background:var(--teal,#0f766e);color:#fff;text-decoration:none;font-weight:600;font-size:.9rem}