/* ==========================================================
   Ace English — Placement Test
   Minimal black / accent #0062FF design system
   ========================================================== */

:root{
  --bg:        #000000;
  --bg-panel:  #0a0a0a;
  --bg-card:   #111214;
  --bg-card-hover: #17181b;
  --border:    #232427;
  --border-soft: #1a1b1e;
  --text:      #f5f6f7;
  --text-dim:  #9a9ba0;
  --text-faint:#5c5d62;
  --accent:    #0062FF;
  --accent-dim:#0062FF33;
  --accent-soft:#0062FF14;
  --good:      #22c55e;
  --bad:       #ef4444;
  --warn:      #f59e0b;
  --radius-s:  10px;
  --radius-m:  16px;
  --radius-l:  24px;
  --maxw:      760px;
  --font: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ color-scheme: dark; }
html,body{ height:100%; }
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}

.bg-glow{
  position:fixed;
  top:-30%; left:50%;
  width:1200px; height:900px;
  transform:translateX(-50%);
  background:radial-gradient(circle at center, var(--accent-soft) 0%, transparent 65%);
  pointer-events:none;
  z-index:0;
}

::selection{ background:var(--accent); color:#fff; }

/* ---------- Topbar ---------- */
.topbar{
  position:sticky; top:0; z-index:20;
  display:flex; align-items:center; justify-content:space-between;
  gap:24px;
  padding:20px 32px;
  background:rgba(0,0,0,0.72);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border-soft);
}
.logo{ height:26px; width:auto; display:block; }

.progress-wrap{
  flex:1;
  max-width:420px;
  display:flex; align-items:center; gap:14px;
}
.progress-wrap[hidden]{ display:none; }
.progress-track{
  flex:1; height:4px; border-radius:4px;
  background:var(--border);
  overflow:hidden;
}
.progress-fill{
  height:100%; width:0%;
  background:var(--accent);
  border-radius:4px;
  transition:width .45s cubic-bezier(.4,0,.2,1);
}
.progress-label{
  font-size:12px; color:var(--text-dim);
  white-space:nowrap;
  font-variant-numeric: tabular-nums;
}

.lang-switch{
  flex:0 0 auto;
  display:flex; align-items:center; gap:2px;
  background:var(--bg-card); border:1px solid var(--border);
  border-radius:999px; padding:3px;
}
.lang-btn{
  appearance:none; border:none; cursor:pointer; font-family:inherit;
  background:transparent; color:var(--text-dim);
  font-size:12px; font-weight:700; letter-spacing:.03em;
  padding:6px 12px; border-radius:999px;
  transition:background .15s ease, color .15s ease;
}
.lang-btn:hover{ color:var(--text); }
.lang-btn.active{ background:var(--accent); color:#fff; }

/* ---------- Layout ---------- */
main{
  flex:1;
  position:relative; z-index:1;
  display:flex;
  justify-content:center;
  padding:48px 24px 96px;
}
.screen{
  width:100%;
  max-width:var(--maxw);
  animation:rise .5s cubic-bezier(.16,1,.3,1);
}
@keyframes rise{
  from{ opacity:0; transform:translateY(14px); }
  to{ opacity:1; transform:translateY(0); }
}

/* ---------- Typography ---------- */
h1{ font-size:40px; font-weight:700; letter-spacing:-.02em; margin:0 0 12px; line-height:1.15; }
h2{ font-size:26px; font-weight:700; letter-spacing:-.01em; margin:0 0 6px; }
h3{ font-size:16px; font-weight:600; margin:0 0 4px; color:var(--text-dim); text-transform:uppercase; letter-spacing:.08em; font-size:12px;}
p{ line-height:1.6; color:var(--text-dim); margin:0 0 16px; }
.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-size:12px; font-weight:600; letter-spacing:.1em; text-transform:uppercase;
  color:var(--accent); margin-bottom:18px;
}
.eyebrow::before{
  content:""; width:6px; height:6px; border-radius:50%; background:var(--accent);
  box-shadow:0 0 12px var(--accent);
}

/* ---------- Buttons ---------- */
.btn{
  appearance:none; border:none; cursor:pointer;
  font-family:inherit; font-size:15px; font-weight:600;
  padding:14px 26px; border-radius:999px;
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  transition:transform .15s ease, background .2s ease, opacity .2s ease, box-shadow .2s ease;
  white-space:nowrap;
}
.btn:active{ transform:scale(.97); }
.btn-primary{ background:var(--accent); color:#fff; box-shadow:0 8px 24px -8px var(--accent-dim); }
.btn-primary:hover{ background:#1a70ff; }
.btn-primary:disabled{ opacity:.35; cursor:not-allowed; box-shadow:none; }
.btn-ghost{ background:var(--bg-card); color:var(--text); border:1px solid var(--border); }
.btn-ghost:hover{ background:var(--bg-card-hover); border-color:#333; }
.btn-text{ background:transparent; color:var(--text-dim); padding:14px 12px; }
.btn-text:hover{ color:var(--text); }
.btn-sm{ padding:9px 16px; font-size:13px; border-radius:8px; }
.btn-row{ display:flex; gap:12px; align-items:center; margin-top:28px; }
.btn-row.split{ justify-content:space-between; }

/* ---------- Cards ---------- */
.card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-m);
  padding:28px;
}
.card + .card{ margin-top:16px; }

/* ---------- Home screen ---------- */
.home-hero{ text-align:center; padding:56px 0 8px; }
.home-hero p{ max-width:520px; margin:0 auto 32px; font-size:16px; }
.section-list{
  display:grid; grid-template-columns:repeat(2,1fr); gap:12px;
  margin:36px 0;
}
.section-chip{
  background:var(--bg-card); border:1px solid var(--border); border-radius:var(--radius-s);
  padding:18px; text-align:left;
}
.section-chip .n{ font-size:12px; color:var(--accent); font-weight:700; letter-spacing:.06em; }
.section-chip .t{ font-size:14px; font-weight:600; margin-top:4px; }
.section-chip .m{ font-size:12px; color:var(--text-faint); margin-top:2px; }

.name-field{
  width:100%; max-width:340px; margin:0 auto 28px;
  display:flex; flex-direction:column; gap:8px;
}
.name-field label{ font-size:12px; color:var(--text-dim); text-align:left; }

input[type=text], input[type=tel], input[type=password], textarea{
  width:100%;
  background:var(--bg-panel);
  border:1px solid var(--border);
  color:var(--text);
  border-radius:var(--radius-s);
  padding:13px 16px;
  font-family:inherit;
  font-size:15px;
  outline:none;
  transition:border-color .15s ease, box-shadow .15s ease;
}
input[type=text]:focus, input[type=tel]:focus, input[type=password]:focus, textarea:focus{
  border-color:var(--accent);
  box-shadow:0 0 0 3px var(--accent-soft);
}
/* Neutralise the browser's built-in autofill background so tel/text inputs
   always match the app's dark theme instead of flashing pale yellow/grey. */
input[type=text]:-webkit-autofill, input[type=tel]:-webkit-autofill{
  -webkit-text-fill-color: var(--text);
  -webkit-box-shadow: 0 0 0 1000px var(--bg-panel) inset;
  transition: background-color 9999s ease-in-out 0s;
}
textarea{ resize:vertical; min-height:44px; }

/* ---------- Question flow (Grammar) ---------- */
.q-meta{
  display:flex; justify-content:space-between; align-items:center;
  margin-bottom:20px;
}
.q-tag{
  font-size:12px; font-weight:700; color:var(--accent); letter-spacing:.08em; text-transform:uppercase;
}
.q-count{ font-size:12px; color:var(--text-faint); font-variant-numeric:tabular-nums; }
.q-text{
  font-size:24px; font-weight:600; line-height:1.4; margin-bottom:28px; letter-spacing:-.01em;
}
.q-text .gap{
  display:inline-block; min-width:64px; border-bottom:2px solid var(--accent);
  margin:0 2px;
}

.opt-list{ display:flex; flex-direction:column; gap:10px; }
.opt{
  display:flex; align-items:center; gap:14px;
  background:var(--bg-card); border:1px solid var(--border);
  border-radius:var(--radius-s); padding:16px 18px;
  cursor:pointer; text-align:left;
  font-size:15px; color:var(--text);
  transition:border-color .15s ease, background .15s ease, transform .1s ease;
}
.opt:hover{ border-color:#3a3b40; background:var(--bg-card-hover); }
.opt .k{
  width:26px; height:26px; flex:0 0 auto;
  border-radius:7px; background:var(--bg-panel); border:1px solid var(--border);
  display:flex; align-items:center; justify-content:center;
  font-size:12px; font-weight:700; color:var(--text-dim);
}
.opt.selected{ border-color:var(--accent); background:var(--accent-soft); }
.opt.selected .k{ background:var(--accent); border-color:var(--accent); color:#fff; }

/* Compact variant: several small option-groups stacked in one card
   (Reading, Listening Part B) rather than one big question per screen. */
.opt-list.compact{ gap:8px; margin-top:10px; }
.opt-list.compact .opt{ padding:11px 14px; font-size:13.5px; gap:10px; }
.opt-list.compact .opt .k{ width:22px; height:22px; font-size:11px; }

/* ---------- Dialogue (Functional) ---------- */
.dialogue{ display:flex; flex-direction:column; gap:14px; margin-bottom:8px; }
.d-line{ display:flex; flex-direction:column; gap:6px; max-width:88%; }
.d-line.assistant{ align-self:flex-start; }
.d-line.customer{ align-self:flex-end; align-items:flex-end; }
.d-who{ font-size:11px; color:var(--text-faint); text-transform:uppercase; letter-spacing:.06em; padding:0 4px; }
.d-bubble{
  background:var(--bg-card); border:1px solid var(--border);
  border-radius:16px; padding:12px 16px; font-size:14.5px; line-height:1.5;
}
.d-line.customer .d-bubble{ background:var(--accent-soft); border-color:var(--accent-dim); }
.blank-select{
  appearance:none;
  background:var(--bg-panel); border:1px solid var(--accent); color:var(--accent);
  border-radius:8px; padding:4px 26px 4px 10px; font-family:inherit; font-size:13px; font-weight:600;
  margin:0 2px; cursor:pointer;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%230062FF' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat; background-position:right 8px center;
}
.blank-select.filled{ background-color:var(--accent-soft); }
.word-bank{
  display:flex; flex-wrap:wrap; gap:8px; margin:0 0 24px;
  padding:16px; background:var(--bg-panel); border:1px solid var(--border-soft); border-radius:var(--radius-s);
}
.word-chip{
  font-size:12px; color:var(--text-dim); background:var(--bg-card); border:1px solid var(--border);
  border-radius:6px; padding:5px 10px;
}
.word-chip b{ color:var(--accent); margin-right:5px; }
.word-chip.used{ opacity:.35; text-decoration:line-through; }
.word-chip.used b{ color:var(--text-faint); }

/* ---------- Reading ---------- */
.passage{
  background:var(--bg-card); border:1px solid var(--border); border-radius:var(--radius-m);
  padding:26px; margin-bottom:28px; max-height:340px; overflow-y:auto;
  font-size:15px; line-height:1.75; color:var(--text-dim);
}
.passage p{ color:inherit; margin-bottom:14px; }
.passage p:last-child{ margin-bottom:0; }
.qa-item{ margin-bottom:20px; }
.qa-item label{ display:block; font-size:14.5px; font-weight:600; margin-bottom:8px; color:var(--text); }
.qa-item .qi{ color:var(--accent); margin-right:6px; }

/* ---------- Listening / Dictation ---------- */
.audio-card{
  background:var(--bg-card); border:1px solid var(--border); border-radius:var(--radius-m);
  padding:20px 22px; margin-bottom:28px;
}
.audio-card audio{ width:100%; height:38px; }
.audio-note{ font-size:12.5px; color:var(--text-faint); margin-top:10px; }
.notes-grid{ display:flex; flex-direction:column; gap:14px; }
.note-row{ display:flex; align-items:center; gap:14px; }
.note-row .label{ flex:1; font-size:14px; color:var(--text-dim); }
.note-row input{ flex:0 0 200px; }

.tts-row{
  display:flex; align-items:center; gap:12px; margin-bottom:14px;
}
.play-btn{
  width:42px; height:42px; border-radius:50%; flex:0 0 auto;
  background:var(--accent); border:none; color:#fff; cursor:pointer;
  display:flex; align-items:center; justify-content:center;
  font-size:16px;
  transition:background .15s ease, transform .1s ease;
}
.play-btn:hover{ background:#1a70ff; }
.play-btn:active{ transform:scale(.94); }
.play-btn:disabled{ background:var(--border); cursor:not-allowed; }
.play-count{ font-size:12px; color:var(--text-faint); font-variant-numeric:tabular-nums; }

/* ---------- Results ---------- */
.score-hero{
  text-align:center; padding:20px 0 12px;
}
.score-ring{
  width:180px; height:180px; margin:0 auto 24px; position:relative;
  display:flex; align-items:center; justify-content:center;
}
.score-ring svg{ width:100%; height:100%; transform:rotate(-90deg); }
.score-ring .bg{ fill:none; stroke:var(--border); stroke-width:8; }
.score-ring .fg{ fill:none; stroke:var(--accent); stroke-width:8; stroke-linecap:round;
  transition:stroke-dashoffset 1s cubic-bezier(.16,1,.3,1); filter:drop-shadow(0 0 10px var(--accent-dim)); }
.score-ring .center{ position:absolute; inset:0; display:flex; flex-direction:column; align-items:center; justify-content:center; }
.score-ring .num{ font-size:40px; font-weight:800; letter-spacing:-.02em; }
.score-ring .den{ font-size:13px; color:var(--text-faint); }

.level-pill{
  display:inline-flex; flex-direction:column; align-items:center; gap:2px;
  background:var(--accent-soft); border:1px solid var(--accent-dim);
  border-radius:16px; padding:14px 28px; margin-top:8px;
}
.level-pill .l1{ font-size:20px; font-weight:700; color:var(--accent); }
.level-pill .l2{ font-size:12.5px; color:var(--text-dim); }

.results-disclaimer{
  font-size:14.5px; line-height:1.6; color:var(--text-dim); text-align:center;
  background:var(--accent-soft); border:1px solid var(--accent-dim); border-radius:var(--radius-m);
  padding:20px 24px; margin-top:20px;
}

.contact-card{
  margin-top:16px; padding:20px 24px;
  background:var(--bg-card); border:1px solid var(--border); border-radius:var(--radius-m);
}
.contact-title{
  font-size:12px; font-weight:700; text-transform:uppercase; letter-spacing:.08em;
  color:var(--accent); margin-bottom:14px; text-align:center;
}
.contact-row{
  display:flex; align-items:baseline; justify-content:center; flex-wrap:wrap;
  gap:8px; font-size:14px; color:var(--text); text-align:center;
  padding:6px 0;
}
.contact-row .contact-label{ color:var(--text-faint); font-size:12.5px; }
.contact-row a{ color:var(--accent); text-decoration:none; }
.contact-row a:hover{ text-decoration:underline; }

/* ---------- misc ---------- */
.center-note{ text-align:center; color:var(--text-faint); font-size:13px; margin-top:20px; }
.hidden{ display:none !important; }

@media (max-width:640px){
  .topbar{ padding:16px 18px; }
  main{ padding:32px 16px 80px; }
  h1{ font-size:30px; }
  .q-text{ font-size:19px; }
  .section-list{ grid-template-columns:1fr; }
  .note-row{ flex-direction:column; align-items:stretch; gap:6px; }
  .note-row input{ flex:1; }
}