:root {
  --bg: #0b1020;
  --card: #111827;
  --muted: #9ca3af;
  --text: #e5e7eb;
  --line: #1f2937;
  --accent: #60a5fa;
  --danger: #fb7185;
  --ok: #34d399;
}

/* Always respect the HTML hidden attribute */
[hidden] { display: none !important; }


* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 50% -10%, #1f2a44 0%, var(--bg) 45%);
  color: var(--text);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  background: rgba(17, 24, 39, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}

.brand { display: flex; gap: 10px; align-items: center; }
.logo {
  width: 34px; height: 34px; border-radius: 10px;
  display: grid; place-items: center;
  background: linear-gradient(180deg, #2563eb, #60a5fa);
  font-weight: 900;
}
.title { font-weight: 800; letter-spacing: 0.2px; }
.subtitle { font-size: 12px; color: var(--muted); margin-top: 2px; }

.container { max-width: 980px; margin: 0 auto; padding: 14px; }
.card {
  background: rgba(17, 24, 39, 0.78);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
  margin-bottom: 14px;
}

.grid2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
@media (min-width: 860px) {
  .grid2 { grid-template-columns: 1fr 1fr; }
}

.panel {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px;
  background: rgba(3, 7, 18, 0.35);
}

h2, h3 { margin: 8px 0 10px; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.row.space { justify-content: space-between; }
.col { flex: 1; min-width: 230px; }
.col.actions { display: flex; gap: 10px; justify-content: flex-end; }

.label { display: block; font-size: 12px; color: var(--muted); margin: 10px 0 6px; }
.label.small { margin: 0; }
.hint { margin-top: 6px; color: var(--muted); font-size: 12px; line-height: 1.3; }

.input {
  width: 100%;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(0,0,0,0.22);
  color: var(--text);
  outline: none;
}
.input.small { width: 86px; }

.btn {
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid #2b3548;
  background: rgba(96, 165, 250, 0.18);
  color: var(--text);
  font-weight: 700;
  cursor: pointer;
}
.btn:active { transform: translateY(1px); }
.btn.ghost {
  background: rgba(255,255,255,0.06);
}

.status {
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(0,0,0,0.22);
  border: 1px dashed #2b3548;
  color: var(--muted);
}

.status.ok { border-color: rgba(52, 211, 153, 0.35); color: rgba(52, 211, 153, 0.95); }
.status.bad { border-color: rgba(251, 113, 133, 0.35); color: rgba(251, 113, 133, 0.95); }

.divider {
  height: 1px;
  background: var(--line);
  margin: 12px 0;
}

.access {
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(96, 165, 250, 0.25);
  background: rgba(96, 165, 250, 0.08);
}

.list { margin-top: 10px; display: flex; flex-direction: column; gap: 10px; }
.item {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 10px 12px;
  background: rgba(0,0,0,0.18);
  cursor: pointer;
}
.item .id { font-weight: 900; color: var(--accent); }
.item .txt { margin-top: 6px; color: var(--text); line-height: 1.25; }
.item .meta { margin-top: 6px; font-size: 12px; color: var(--muted); }

.meta { color: var(--muted); font-size: 12px; margin-bottom: 10px; }
.qtext { font-size: 16px; line-height: 1.4; white-space: pre-wrap; }
.options { margin-top: 10px; display: flex; flex-direction: column; gap: 8px; }
.opt {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 12px;
  background: rgba(0,0,0,0.18);
  white-space: pre-wrap;
}

.answer, .explain {
  margin-top: 12px;
  padding: 12px;
  border-radius: 14px;
  border: 1px solid rgba(52, 211, 153, 0.20);
  background: rgba(52, 211, 153, 0.06);
  white-space: pre-wrap;
}

.footer { text-align: center; color: var(--muted); font-size: 12px; padding: 10px; }

/* Paystack section tweaks */
#btnPay {
  border-color: rgba(52, 211, 153, 0.35);
  background: rgba(52, 211, 153, 0.14);
}

#payMsg {
  margin-top: 8px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px dashed #2b3548;
  background: rgba(0,0,0,0.18);
  color: var(--muted);
}

/* =========================
   Viewer v1: focus + auto-collapse list
   ========================= */

/* When viewer is open, make it feel like "new context" */
body.viewer-open #viewer {
  border-color: rgba(96, 165, 250, 0.45);
  box-shadow:
    0 0 0 2px rgba(96, 165, 250, 0.20),
    0 16px 50px rgba(0,0,0,0.35);
}

/* Small "flash" animation so user instantly knows something changed */
@keyframes viewerFlash {
  0%   { transform: translateY(0); }
  25%  { transform: translateY(-2px); }
  100% { transform: translateY(0); }
}
#viewer.viewer-flash {
  animation: viewerFlash 240ms ease-out;
}

/* Optional but powerful: collapse list slightly so attention shifts */
/* ✅ Always keep #list a scroll container so it never resets to top */
#list {
  overflow: auto;
  max-height: none; /* normal full height when viewer is closed */
  transition: max-height 180ms ease, opacity 180ms ease;
}

/* When viewer is open, only shrink height + fade (do NOT change overflow) */
body.viewer-open #list {
  max-height: 260px;  /* adjust to taste */
  opacity: 0.78;
}


/* Make list feel less clickable when viewer is open (but still usable) */
body.viewer-open .item {
  opacity: 0.92;
}

/* =========================
   Question card highlight (Viewer v1)
   ========================= */

.item {
  transition: background-color 160ms ease, border-color 160ms ease, opacity 160ms ease;
}

/* Highlight the active question */
.item.active-question {
  background-color: rgba(96, 165, 250, 0.12);
  border-left: 4px solid #60a5fa;
  opacity: 1;
}

/* Slightly dim others when a question is open */
body.viewer-open .item:not(.active-question) {
  opacity: 0.65;
}

.item.active-question {
  scroll-margin-top: 12px; /* helps when scrollIntoView aligns */
}


/* ---- A1: Header + Practice entry ---- */
.topbar-right { display: flex; align-items: center; gap: 10px; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.3px;
  border: 1px solid rgba(255,255,255,0.10);
  background: rgba(16, 185, 129, 0.12);
  color: rgba(167, 243, 208, 0.95);
}

.h2-tight { margin: 0; line-height: 1.1; }


/* =========================
   Option interaction (visual only)
   ========================= */

.opt {
  cursor: pointer;
  transition: transform 120ms ease, border-color 160ms ease, background-color 160ms ease;
}
.opt:hover { transform: translateY(-1px); }
.opt.selected {
  border-color: rgba(96, 165, 250, 0.55);
  background: rgba(96, 165, 250, 0.14);
  box-shadow: 0 0 0 2px rgba(96, 165, 250, 0.18);
}

/* =========================
   Sticky bottom actions (Viewer)
   ========================= */

.viewer-actions {
  position: sticky;
  bottom: 0;
  z-index: 5;

  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;

  padding: 10px;
  padding-bottom: calc(10px + env(safe-area-inset-bottom));
  margin-top: 12px;

  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 14px;

  background: rgba(9, 12, 18, 0.72);
  backdrop-filter: blur(10px);
}
.viewer-actions-spacer { flex: 1; }

#viewer { padding-bottom: 14px; }
/* =========================
   A2: Collapsible Filters
   ========================= */

.filters-panel {
  margin-top: 12px;
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: 14px;
  background: rgba(255,255,255,0.03);
  overflow: hidden;
}

.filters-panel > summary {
  list-style: none;
  cursor: pointer;
  padding: 12px 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

/* Hide default arrow */
.filters-panel > summary::-webkit-details-marker {
  display: none;
}

/* Custom chevron */
.filters-panel > summary::after {
  content: "▾";
  opacity: 0.8;
  transition: transform 180ms ease;
}

.filters-panel[open] > summary::after {
  transform: rotate(180deg);
}

/* Inner spacing */
.filters-panel > summary + * {
  padding: 0 14px 14px 14px;
}

@media (max-width: 520px) {
  .filters-panel > summary {
    padding: 12px;
  }
  .filters-panel > summary + * {
    padding: 0 12px 12px 12px;
  }
}
/* =========================
   A3: Question list hierarchy
   ========================= */

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.qid {
  font-weight: 800;
  font-size: 13px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(96,165,250,0.14);
  border: 1px solid rgba(96,165,250,0.35);
}

.pill {
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  opacity: 0.85;
}

.item .qtext {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: 6px;
}

/* =========================
   B1: Theme polish (safe)
   ========================= */

/* Slightly improve global readability */
:root {
  --radius: 16px;
  --radius-sm: 12px;
  --shadow: 0 10px 26px rgba(0,0,0,0.28);
  --shadow-sm: 0 6px 16px rgba(0,0,0,0.18);
}

/* Softer app containers */
.panel, .box, .filters-panel, .viewer {
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

/* Headings feel intentional */
h1, h2, h3 {
  letter-spacing: -0.2px;
}

.section-title {
  font-size: 18px;
  font-weight: 800;
  margin: 4px 0 2px 0;
}

.subtle {
  opacity: 0.78;
}

/* Buttons: consistent sizing + tap comfort */
.btn {
  border-radius: 14px;
  padding: 11px 14px;
  font-weight: 750;
  letter-spacing: 0.1px;
  transition: transform 120ms ease, filter 160ms ease, background-color 160ms ease, border-color 160ms ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn.ghost {
  background: rgba(255,255,255,0.04);
  border-color: rgba(255,255,255,0.12);
}

.btn.ghost:hover {
  background: rgba(255,255,255,0.06);
}

/* Inputs feel cleaner */
input, select {
  border-radius: 12px;
  padding: 10px 12px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.10);
}

input:focus, select:focus {
  outline: none;
  border-color: rgba(96, 165, 250, 0.55);
  box-shadow: 0 0 0 2px rgba(96, 165, 250, 0.14);
}

/* Status messages: clearer */
.status.ok { border-color: rgba(34, 197, 94, 0.35); }
.status.bad { border-color: rgba(239, 68, 68, 0.35); }

/* Viewer: tighten spacing + clarity */
#viewer {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

#qTitle {
  font-size: 18px;
  font-weight: 900;
  letter-spacing: -0.2px;
}

#qMeta {
  opacity: 0.75;
}

/* Make list feel a bit more “app-like” */
#list {
  scroll-behavior: smooth;
}

/* Optional: reduce “busy” look on very small screens */
@media (max-width: 520px) {
  .btn { width: 100%; }
  .viewer-actions { gap: 8px; }
  .viewer-actions .viewer-actions-spacer { display: none; }
}

/* =========================
   B2: Brand accent tuning
   ========================= */

/* Brand accents (single source of truth) */
:root{
  --brand: rgba(96, 165, 250, 1);          /* blue accent */
  --brand-weak: rgba(96, 165, 250, 0.14);  /* soft bg */
  --brand-line: rgba(96, 165, 250, 0.42);  /* borders */
  --brand-glow: rgba(96, 165, 250, 0.18);  /* glow */
}

/* Links / highlights */
a, .link {
  color: var(--brand);
}

/* Primary button: consistent “ExamPartner” feel */
.btn:not(.ghost) {
  border-color: var(--brand-line);
  background: rgba(96, 165, 250, 0.18);
}

.btn:not(.ghost):hover {
  background: rgba(96, 165, 250, 0.24);
}

.btn:not(.ghost):active {
  background: rgba(96, 165, 250, 0.20);
}

/* Paid badge / chips feel branded */
.badge,
.pill,
.qid,
.item .id {
  border-color: var(--brand-line);
}

/* Active question card — match brand */
.item.active-question {
  border-color: var(--brand-line);
  background: var(--brand-weak);
  box-shadow: 0 0 0 2px var(--brand-glow), 0 10px 22px rgba(0,0,0,0.20);
}

/* Option selected state — match brand */
.opt.selected {
  border-color: var(--brand-line);
  background: var(--brand-weak);
  box-shadow: 0 0 0 2px var(--brand-glow);
}

/* Inputs focus — match brand */
input:focus, select:focus {
  border-color: var(--brand-line);
  box-shadow: 0 0 0 2px var(--brand-glow);
}

/* Filters panel summary accent on open */
.filters-panel[open] > summary {
  background: rgba(96, 165, 250, 0.06);
}

/* Viewer sticky actions panel border polish */
.viewer-actions {
  border-color: rgba(255,255,255,0.12);
}

/* Subtle separators feel consistent */
hr {
  border: none;
  height: 1px;
  background: rgba(255,255,255,0.10);
}



/* ====== Minimal additions: Gate + List pager ====== */
.pager{
  display:flex;
  gap:10px;
  align-items:center;
  flex-wrap:wrap;
  justify-content:flex-end;
  margin-top: 8px;
}
.pager-meta{ display:flex; gap:8px; align-items:center; }

.gate{
  margin: 12px 0;
  padding: 14px;
  border: 1px dashed rgba(0,0,0,0.25);
  border-radius: 12px;
}

/* Sub-questions block (Theory) */
.subqs {
  margin-top: 12px;
  padding: 12px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.10);
  background: rgba(255,255,255,0.03);
}

.subqs .subq-title{
  font-weight: 800;
  margin-bottom: 8px;
  opacity: 0.95;
}

.subqs .subq-card{
  margin: 10px 0;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(0,0,0,0.16);
}

.subqs .subq-children{
  margin-top: 10px;
  padding-left: 10px;
  border-left: 2px solid rgba(255,255,255,0.12);
}
/* Paywall subtle slide + fade */
.paywall {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transform: translateY(-6px);
  transition: max-height 220ms ease, opacity 220ms ease, transform 220ms ease;
  will-change: max-height, opacity, transform;
}

/* Visible state */
.paywall.is-open {
  max-height: 200px; /* enough to fit the content */
  opacity: 1;
  transform: translateY(0);
}

/* Respect reduced motion settings */
@media (prefers-reduced-motion: reduce) {
  .paywall {
    transition: none;
  }
}


.gate-title{ font-weight: 700; margin-bottom: 4px; }
.gate-sub{ opacity: .85; margin-bottom: 10px; }