/* ===================== Design tokens ===================== */
:root {
  --bg: #f7fafc;
  --card: #ffffff;
  --card-soft: #fafafa;
  --text: #111;
  --text-muted: #666666;
  --text-faint: #8d8d8d;
  --border: #e8ecf1;
  --border-strong: #d8dee6;

  --black: #1e1e1e;
  --brand: #004370;

  --accent-blue: #0098f2;
  --accent-blue-soft: #0098f229;
  --accent-magenta: #f200ca;
  --accent-magenta-soft: #f200c929;
  --accent-purple: #6c56fc;
  --accent-purple-soft: #6c56fc29;
  --accent-green: #5d9c06;
  --accent-green-soft: #5d9c0629;
  --accent-red: #ff6363;
  --accent-red-soft: #ff636329;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 1px 3px rgba(15, 23, 42, 0.06), 0 8px 24px rgba(15, 23, 42, 0.05);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-pill: 999px;
}

/* ===================== Reset ===================== */
* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  padding: 1rem 1rem 4rem;
}

a { color: inherit; }

/* ===================== Top bar ===================== */
.topbar {
  max-width: 1080px;
  margin: 0 auto 2rem;
  padding: 0.5rem 0.5rem 0.5rem 1.5rem;
  background: var(--card);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

.logo {
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  font-size: 1rem;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

#topnav {
  display: flex;
  gap: 0.15rem;
  align-items: center;
  flex-wrap: wrap;
}

#topnav a, #topnav button {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.88rem;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-pill);
  background: transparent;
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-weight: 500;
}

#topnav a:hover, #topnav button:hover {
  background: var(--bg);
  color: var(--text);
}

#topnav a.nav-cta {
  background: var(--black);
  color: #fff;
  padding: 0.6rem 1.1rem;
  margin-left: 0.25rem;
}
#topnav a.nav-cta:hover {
  background: #000;
  color: #fff;
}

/* ===================== Layout ===================== */
#app {
  max-width: 1080px;
  margin: 0 auto;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 1rem;
}

/* ===================== Hero ===================== */
.hero {
  text-align: center;
  padding: 3.5rem 1rem 3rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.95rem;
  border-radius: var(--radius-pill);
  background: var(--accent-blue-soft);
  color: var(--accent-blue);
  font-size: 0.82rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: clamp(2.25rem, 6.5vw, 4.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.035em;
  margin: 0 auto 1.5rem;
  max-width: 880px;
  color: var(--text);
}

.hero-lead {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 480px;
  margin: 0 auto 2rem;
  line-height: 1.55;
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

/* Inline check stats — like the reference */
.hero-stats {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1.75rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
  font-size: 0.95rem;
  color: var(--accent-blue);
  font-weight: 500;
}

.stat-check {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  white-space: nowrap;
}

.stat-check::before {
  content: "✓";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent-blue);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  flex-shrink: 0;
}

/* Used-by strip */
.used-by {
  text-align: center;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-faint);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 1.5rem 0 3rem;
}

/* ===================== Buttons ===================== */
.btn-pill-primary,
.btn-pill-secondary,
.btn-primary,
.btn-secondary,
.btn-link {
  font-family: inherit;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
  text-decoration: none;
  padding: 0.85rem 1.6rem;
  line-height: 1.2;
}

.btn-pill-primary, .btn-primary {
  background: var(--black);
  color: #fff;
  border-color: var(--black);
}
.btn-pill-primary:hover, .btn-primary:hover { background: #000; }
.btn-pill-primary:active, .btn-primary:active { transform: scale(0.98); }

.btn-pill-secondary, .btn-secondary {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border-strong);
}
.btn-pill-secondary:hover, .btn-secondary:hover { background: var(--bg); }

button:disabled, button[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
}

.link {
  background: none;
  border: none;
  color: var(--accent-blue);
  padding: 0;
  font-size: 0.9rem;
  font-family: inherit;
  cursor: pointer;
  text-decoration: none;
}
.link:hover { text-decoration: underline; }

/* ===================== Sections ===================== */
.section {
  padding: 3rem 1rem;
}

.section-eyebrow {
  text-align: center;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 0 0 0.75rem;
  color: var(--accent-blue);
}

.section-title {
  text-align: center;
  font-size: clamp(1.65rem, 3.5vw, 2.4rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 auto 2.5rem;
  max-width: 700px;
}

/* ===================== "Who is this for" grid ===================== */
.for-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  max-width: 980px;
  margin: 0 auto;
}

.for-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem;
}

.for-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.for-card h3 .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.for-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.55;
}

.dot-blue    { background: var(--accent-blue); }
.dot-purple  { background: var(--accent-purple); }
.dot-magenta { background: var(--accent-magenta); }
.dot-green   { background: var(--accent-green); }

/* ===================== Modes (Учене / Изпит) ===================== */
.modes-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  max-width: 880px;
  margin: 0 auto;
}

.mode-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
}

.mode-card .badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 500;
  margin-bottom: 0.85rem;
}

.badge-blue    { background: var(--accent-blue-soft);    color: var(--accent-blue); }
.badge-purple  { background: var(--accent-purple-soft);  color: var(--accent-purple); }
.badge-magenta { background: var(--accent-magenta-soft); color: var(--accent-magenta); }
.badge-green   { background: var(--accent-green-soft);   color: var(--accent-green); }

.mode-card h2 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 0.5rem;
}

.mode-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0 0 1.25rem;
  line-height: 1.55;
}

/* ===================== Pricing ===================== */
.pricing-wrap {
  display: flex;
  justify-content: center;
  padding: 2rem 1rem 0;
}

.price-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
  max-width: 380px;
  width: 100%;
}

.price-card h3 {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  margin: 0 0 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.price {
  font-size: 3.25rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 0.5rem 0 0.25rem;
  line-height: 1;
}

.price-period {
  font-size: 1.1rem;
  color: var(--text-muted);
  font-weight: 400;
}

.price-features {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
  text-align: left;
  font-size: 0.92rem;
}

.price-features li {
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--text);
}

.price-features li::before {
  content: "✓";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent-blue);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  flex-shrink: 0;
}

/* ===================== Forms (auth) ===================== */
.auth-tabs {
  display: flex;
  gap: 0.25rem;
  margin-bottom: 1.5rem;
  background: var(--bg);
  padding: 0.25rem;
  border-radius: var(--radius-pill);
}
.auth-tab {
  flex: 1;
  background: transparent;
  border: none;
  padding: 0.55rem 1rem;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  cursor: pointer;
  font-family: inherit;
  color: var(--text-muted);
  transition: background 0.15s;
}
.auth-tab.active {
  background: var(--card);
  color: var(--text);
  font-weight: 500;
  box-shadow: var(--shadow-sm);
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}
.auth-form h2 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0;
}
.auth-form label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.auth-form input {
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--text);
  background: var(--card);
}
.auth-form input:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px var(--accent-blue-soft);
}
.auth-form button[type="submit"] {
  margin-top: 0.5rem;
  padding: 0.85rem;
}

.auth-foot {
  text-align: center;
  margin: 0.25rem 0 0;
  font-size: 0.85rem;
}
.auth-foot a {
  color: var(--accent-blue);
  text-decoration: none;
}

/* ===================== Notifications ===================== */
.info {
  background: var(--accent-blue-soft);
  color: var(--accent-blue);
  padding: 0.7rem 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
  font-size: 0.88rem;
}
.info a { color: inherit; font-weight: 500; }

.success-info {
  background: var(--accent-green-soft);
  color: var(--accent-green);
}

.error {
  background: var(--accent-red-soft);
  color: var(--accent-red);
  padding: 0.6rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  margin: 0.5rem 0 0;
}

.success {
  background: var(--accent-green-soft);
  color: var(--accent-green);
  padding: 0.6rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  margin: 0.5rem 0 0;
}

/* ===================== Quiz ===================== */
.quiz-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

#progress {
  font-weight: 500;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.score {
  font-variant-numeric: tabular-nums;
  font-size: 0.85rem;
}

.timer {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  background: var(--accent-blue-soft);
  color: var(--accent-blue);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-pill);
  font-size: 0.88rem;
}

.timer.timer-warn {
  background: var(--accent-red-soft);
  color: var(--accent-red);
  animation: pulse 1.2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.reference {
  font-size: 0.72rem;
  color: var(--text-faint);
  margin: 0 0 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

#question-text {
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1.4;
  margin: 0.4rem 0 1rem;
  letter-spacing: -0.005em;
}

#question-image {
  display: block;
  max-width: 100%;
  max-height: 360px;
  margin: 1rem 0;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: white;
}

#answers {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin: 1rem 0 1.5rem;
}

.answer-btn {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  text-align: left;
  padding: 0.85rem 1rem;
  font-size: 0.95rem;
  font-family: inherit;
  cursor: pointer;
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  white-space: pre-wrap;
  color: var(--text);
  transition: border-color 0.15s, background 0.15s;
}

.answer-btn:hover:not(:disabled) {
  border-color: var(--accent-blue);
  background: var(--accent-blue-soft);
}

.answer-btn:disabled { cursor: default; }

.answer-btn .label {
  font-weight: 600;
  color: var(--text-muted);
  flex-shrink: 0;
  min-width: 1.5rem;
}

.answer-btn.correct {
  background: var(--accent-green-soft);
  border-color: var(--accent-green);
  color: var(--accent-green);
}
.answer-btn.correct .label { color: var(--accent-green); }

.answer-btn.wrong {
  background: var(--accent-red-soft);
  border-color: var(--accent-red);
  color: var(--accent-red);
}
.answer-btn.wrong .label { color: var(--accent-red); }

/* Selector view (range inputs) */
.range-row {
  display: flex;
  gap: 0.75rem;
  margin: 0.5rem 0 1.25rem;
}
.range-row label {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}
input[type=number] {
  flex: 1;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: inherit;
  background: var(--card);
  color: var(--text);
  width: 100%;
  min-width: 0;
}
input[type=number]:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px var(--accent-blue-soft);
}

/* Summary */
.big-score {
  font-size: 2.75rem;
  font-weight: 700;
  text-align: center;
  letter-spacing: -0.025em;
  margin: 1.5rem 0 0.5rem;
}
#final-correct { color: var(--accent-green); }
#summary-view .subtitle { text-align: center; color: var(--text-muted); }
#summary-view .actions { justify-content: center; }

.result-pill {
  display: block;
  width: fit-content;
  margin: 0.75rem auto 1rem;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-pill);
  font-weight: 500;
  font-size: 0.9rem;
}
.result-pill.passed {
  background: var(--accent-green-soft);
  color: var(--accent-green);
}
.result-pill.failed {
  background: var(--accent-red-soft);
  color: var(--accent-red);
}

/* ===================== Account / Paywall ===================== */
#account-view h1, #paywall-view h1 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
}

.subtitle {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin: 0 0 1.25rem;
}

.actions {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.payment-option {
  border: 1px solid var(--border);
}
.payment-option h2 {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 0 0.4rem;
  letter-spacing: -0.01em;
}
.payment-disabled {
  opacity: 0.55;
}

.bank-details {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}
.bank-details h3 {
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
  font-weight: 600;
}
.bank-details table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.bank-details th {
  text-align: left;
  padding: 0.4rem 0.5rem 0.4rem 0;
  color: var(--text-muted);
  font-weight: 500;
  width: 35%;
  vertical-align: top;
}
.bank-details td {
  padding: 0.4rem 0;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Consolas, monospace;
  word-break: break-all;
}
.bank-ref-row td strong {
  background: var(--accent-magenta-soft);
  color: var(--accent-magenta);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 1.05rem;
  letter-spacing: 0.04em;
}
.bank-warn {
  margin: 1rem 0 0;
  padding: 0.75rem 1rem;
  background: var(--accent-magenta-soft);
  color: #5b007e;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  line-height: 1.5;
}

/* ===================== Admin ===================== */
.admin-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
  font-size: 0.88rem;
}
.admin-table th, .admin-table td {
  text-align: left;
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.admin-table th {
  color: var(--text-muted);
  font-weight: 500;
  background: var(--bg);
}
.admin-table .row-actions { display: flex; gap: 0.4rem; }
.admin-table .row-actions button {
  padding: 0.35rem 0.85rem;
  font-size: 0.82rem;
}
.admin-empty { text-align: center; color: var(--text-muted); padding: 2rem; }

/* ===================== Legal pages ===================== */
.legal { line-height: 1.7; }
.legal h1 { margin-bottom: 0.25rem; font-size: 1.85rem; font-weight: 700; letter-spacing: -0.02em; }
.legal h2 { margin-top: 2rem; font-size: 1.15rem; font-weight: 700; border-bottom: 1px solid var(--border); padding-bottom: 0.4rem; }
.legal h3 { margin-top: 1.25rem; font-size: 1rem; font-weight: 600; }
.legal p, .legal li { color: #374151; font-size: 0.95rem; }
.legal a { color: var(--accent-blue); }
.legal ul, .legal ol { padding-left: 1.5rem; }
.legal li { margin-bottom: 0.35rem; }
.legal-table { width: 100%; border-collapse: collapse; margin: 1rem 0; font-size: 0.92rem; }
.legal-table th { text-align: left; padding: 0.6rem 0.8rem; background: var(--bg); font-weight: 500; width: 40%; border-bottom: 1px solid var(--border); color: var(--text-muted); }
.legal-table td { padding: 0.6rem 0.8rem; border-bottom: 1px solid var(--border); }

/* ===================== Footer ===================== */
.site-footer {
  max-width: 1080px;
  margin: 3rem auto 0;
  padding: 1.5rem 1rem;
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-faint);
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.4rem 0.85rem;
  border-top: 1px solid var(--border);
}
.site-footer a {
  color: var(--text-faint);
  text-decoration: none;
}
.site-footer a:hover {
  color: var(--text);
  text-decoration: underline;
}

/* ===================== Responsive ===================== */
@media (max-width: 720px) {
  .for-grid { grid-template-columns: 1fr; }
  .modes-grid { grid-template-columns: 1fr; }
  body { padding: 0.5rem 0.5rem 3rem; }
  .card { padding: 1.25rem; }
  .hero { padding: 2rem 0.5rem 1.5rem; }
  .topbar { padding: 0.4rem 0.4rem 0.4rem 1rem; gap: 0.4rem; }
  .topbar .logo { font-size: 0.9rem; }
  #topnav a, #topnav button { padding: 0.4rem 0.65rem; font-size: 0.8rem; }
  #topnav a.nav-cta { padding: 0.45rem 0.85rem; }
  .hero-stats { gap: 1rem; font-size: 0.85rem; }
  .section { padding: 2rem 0.75rem; }
  .price { font-size: 2.5rem; }
  .price-card { padding: 1.5rem; }
  #account-view h1, #paywall-view h1, .legal h1 { font-size: 1.4rem; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 2rem; line-height: 1.1; }
  .hero-lead { font-size: 0.95rem; }
  .hero-stats { flex-direction: column; gap: 0.5rem; align-items: center; }
}