/* ============ Engsy site — shared styles ============ */
:root {
  --pink: #FF4D79;
  --pink-deep: #ED3563;
  --pink-soft: #FFE7EE;
  --magenta: #FF54BE;
  --amber: #F7A923;
  --amber-soft: #FFF3DB;
  --green: #6DBE2A;
  --green-bright: #78C110;
  --green-soft: #EAF7DB;
  --blue: #41ADFF;
  --blue-soft: #E0F2FF;
  --ink: #1F2430;
  --body: #5A6270;
  --muted: #8A92A3;
  --line: rgba(31, 36, 48, 0.08);
  --card: #FFFFFF;
  --bg: #FFFFFF;
  --bg-warm: #FBFAF8;
  --shadow-soft: 0 24px 60px -24px rgba(31, 36, 48, 0.18);
  --shadow-float: 0 40px 90px -30px rgba(31, 36, 48, 0.22);
  --ease-spring: cubic-bezier(0.32, 0.72, 0, 1);
  --r-xl: 2rem;
  --r-lg: 1.5rem;
  --r-md: 1.125rem;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--body);
  background: var(--bg);
  line-height: 1.65;
  font-size: 1.0625rem;
  overflow-x: hidden;
}
h1, h2, h3, h4 {
  font-family: "Baloo 2", "Plus Jakarta Sans", sans-serif;
  color: var(--ink);
  line-height: 1.12;
  font-weight: 700;
  letter-spacing: -0.01em;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--pink-deep); text-decoration: none; }
a:hover { text-decoration: none; }
p a, li a { text-decoration: underline; text-decoration-color: rgba(237, 53, 99, 0.35); text-underline-offset: 3px; }
p a:hover, li a:hover { text-decoration-color: var(--pink-deep); }

.wrap { max-width: 72rem; margin: 0 auto; padding: 0 1.5rem; }

/* ---------- eyebrow ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 0.5rem;
  border-radius: 999px; padding: 0.3rem 0.85rem;
  font-size: 0.6875rem; font-weight: 700; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--pink-deep);
  background: var(--pink-soft);
}
.eyebrow.green { color: #4E8A1D; background: var(--green-soft); }
.eyebrow.blue { color: #1D6FB8; background: var(--blue-soft); }
.eyebrow.amber { color: #A86A07; background: var(--amber-soft); }

/* ---------- nav ---------- */
.nav {
  position: fixed; top: 1.25rem; left: 50%; transform: translateX(-50%);
  z-index: 50; display: flex; align-items: center; gap: 1.75rem;
  padding: 0.55rem 0.65rem 0.55rem 1.1rem;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(20px) saturate(1.6);
  -webkit-backdrop-filter: blur(20px) saturate(1.6);
  border: 1px solid rgba(31, 36, 48, 0.07);
  border-radius: 999px;
  box-shadow: 0 12px 40px -16px rgba(31, 36, 48, 0.25);
  transition: box-shadow 0.7s var(--ease-spring);
  white-space: nowrap;
}
.nav-logo { display: flex; align-items: center; gap: 0.6rem; font-family: "Baloo 2", sans-serif; font-weight: 800; font-size: 1.15rem; color: var(--ink); }
.nav-logo img { width: 30px; height: 30px; border-radius: 8px; }
.nav-links { display: flex; gap: 1.4rem; font-size: 0.9rem; font-weight: 600; }
.nav-links a { color: var(--body); transition: color 0.4s var(--ease-spring); }
.nav-links a:hover { color: var(--ink); }
.nav-cta {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: var(--ink); color: #fff; font-weight: 700; font-size: 0.875rem;
  padding: 0.55rem 1.1rem; border-radius: 999px;
  transition: transform 0.5s var(--ease-spring), background 0.5s var(--ease-spring);
}
.nav-cta:hover { background: #000; transform: scale(1.03); }
.nav-cta:active { transform: scale(0.97); }

/* ---------- buttons ---------- */
.btn-appstore {
  display: inline-flex; align-items: center; gap: 0.75rem;
  background: var(--ink); color: #fff;
  padding: 0.9rem 1.5rem; border-radius: 999px;
  font-weight: 700; font-size: 1rem;
  transition: transform 0.5s var(--ease-spring), box-shadow 0.5s var(--ease-spring), background 0.5s var(--ease-spring);
  box-shadow: 0 18px 40px -18px rgba(31, 36, 48, 0.55);
}
.btn-appstore svg { display: block; }
.btn-appstore:hover { background: #000; transform: translateY(-2px) scale(1.02); box-shadow: 0 26px 50px -18px rgba(31, 36, 48, 0.6); }
.btn-appstore:active { transform: scale(0.98); }
.btn-appstore .sub { display: block; font-size: 0.6875rem; font-weight: 500; opacity: 0.7; line-height: 1.1; }
.btn-appstore .main { display: block; font-size: 1.05rem; line-height: 1.2; }

/* official store badges */
.store-badges { display: flex; gap: 0.8rem; align-items: center; flex-wrap: wrap; }
.store-badges a { display: inline-block; flex: none; transition: transform 0.5s var(--ease-spring), filter 0.5s var(--ease-spring); }
.store-badges a:hover { transform: translateY(-2px) scale(1.03); }
.store-badges a:active { transform: scale(0.97); }
.store-badges img { height: 3.25rem; width: auto; max-width: none; display: block; }
.store-badges.sm img { height: 2.6rem; }
.drill-cta .store-badges img { height: 2.5rem; }
.drill-cta .store-badges { justify-content: center; gap: 0.6rem; }
.aside-card .store-badges { flex-direction: column; align-items: center; gap: 0.6rem; }
.aside-card .store-badges img { height: 2.6rem; }

.btn-pill {
  display: inline-flex; align-items: center; gap: 0.6rem;
  background: var(--pink); color: #fff;
  padding: 0.85rem 0.85rem 0.85rem 1.5rem; border-radius: 999px;
  font-weight: 700; font-size: 1rem;
  transition: transform 0.5s var(--ease-spring), background 0.5s var(--ease-spring), box-shadow 0.5s var(--ease-spring);
  box-shadow: 0 18px 40px -16px rgba(237, 53, 99, 0.55);
}
.btn-pill .arr {
  width: 2rem; height: 2rem; border-radius: 999px;
  background: rgba(255, 255, 255, 0.22);
  display: inline-flex; align-items: center; justify-content: center;
  transition: transform 0.5s var(--ease-spring);
}
.btn-pill:hover { background: var(--pink-deep); transform: translateY(-2px); }
.btn-pill:hover .arr { transform: translateX(3px) scale(1.06); }
.btn-pill:active { transform: scale(0.98); }

.link-quiet {
  display: inline-flex; align-items: center; gap: 0.45rem;
  font-weight: 700; color: var(--ink); font-size: 1rem;
  border-bottom: 2px solid rgba(65, 173, 255, 0.45);
  padding-bottom: 2px;
  transition: border-color 0.4s var(--ease-spring);
}
.link-quiet:hover { border-color: var(--blue); }
.link-quiet .down { transition: transform 0.4s var(--ease-spring); }
.link-quiet:hover .down { transform: translateY(2px); }

/* ---------- reveal ---------- */
.reveal { opacity: 0; transform: translateY(3.5rem); filter: blur(6px); transition: opacity 0.9s var(--ease-spring), transform 0.9s var(--ease-spring), filter 0.9s var(--ease-spring); }
.reveal.in { opacity: 1; transform: translateY(0); filter: blur(0); }
.reveal.d1 { transition-delay: 0.08s; }
.reveal.d2 { transition-delay: 0.16s; }
.reveal.d3 { transition-delay: 0.24s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; filter: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- sections ---------- */
.section { padding: 7rem 0; }
.section-head { max-width: 44rem; margin-bottom: 3.5rem; }
.section-head h2 { font-size: clamp(2rem, 4.2vw, 3rem); margin: 0.9rem 0 1rem; }
.section-head p { font-size: 1.125rem; }

/* ---------- double-bezel card ---------- */
.shell {
  background: rgba(31, 36, 48, 0.035);
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  padding: 0.4rem;
}
.shell > .core {
  background: var(--card);
  border-radius: calc(var(--r-xl) - 0.4rem);
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.9), 0 1px 2px rgba(31, 36, 48, 0.04);
  height: 100%;
}

/* ---------- footer ---------- */
footer { background: #171B24; color: #B9BFCC; padding: 4.5rem 0 2.5rem; }
footer h4 { color: #fff; font-size: 1rem; margin-bottom: 1rem; }
footer a { color: #B9BFCC; }
footer a:hover { color: #fff; }
.foot-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 3rem; margin-bottom: 3.5rem; }
.foot-brand { display: flex; align-items: center; gap: 0.7rem; font-family: "Baloo 2", sans-serif; font-weight: 800; font-size: 1.3rem; color: #fff; margin-bottom: 0.9rem; }
.foot-brand img { width: 36px; height: 36px; border-radius: 9px; }
.foot-col ul { list-style: none; display: grid; gap: 0.6rem; font-size: 0.9375rem; }
.foot-note { border-top: 1px solid rgba(255, 255, 255, 0.09); padding-top: 2rem; font-size: 0.8125rem; color: #7D8494; display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }

/* ---------- guide pages ---------- */
.guide-hero { padding: 9.5rem 0 3.5rem; background: linear-gradient(180deg, var(--bg-warm), #fff); }
.guide-hero h1 { font-size: clamp(2.1rem, 4.6vw, 3.2rem); max-width: 50rem; margin: 1rem 0 1.2rem; }
.guide-hero .lede { font-size: 1.2rem; max-width: 42rem; }
.crumbs { font-size: 0.85rem; color: var(--muted); display: flex; gap: 0.5rem; flex-wrap: wrap; }
.crumbs a { color: var(--muted); }
.crumbs a:hover { color: var(--ink); }
.guide-body { display: grid; grid-template-columns: minmax(0, 1fr) 18rem; gap: 4rem; padding: 3rem 0 6rem; }
.prose { max-width: 46rem; }
.prose h2 { font-size: 1.75rem; margin: 3rem 0 1rem; }
.prose h3 { font-size: 1.25rem; margin: 2.2rem 0 0.8rem; }
.prose p { margin-bottom: 1.15rem; }
.prose ul, .prose ol { margin: 0 0 1.15rem 1.4rem; }
.prose li { margin-bottom: 0.5rem; }
.prose table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; font-size: 0.9375rem; }
.prose th { text-align: left; font-weight: 700; color: var(--ink); padding: 0.6rem 0.9rem; background: var(--bg-warm); }
.prose td { padding: 0.6rem 0.9rem; border-top: 1px solid var(--line); }
.prose .good { color: #3E7A12; font-weight: 600; }
.prose .bad { color: var(--pink-deep); font-weight: 600; text-decoration: line-through; text-decoration-thickness: 1.5px; }
.callout {
  border-radius: var(--r-lg); padding: 1.4rem 1.6rem; margin: 1.8rem 0;
  background: var(--blue-soft); border: 1px solid rgba(65, 173, 255, 0.25);
}
.callout.pink { background: var(--pink-soft); border-color: rgba(255, 77, 121, 0.25); }
.callout.green { background: var(--green-soft); border-color: rgba(120, 193, 16, 0.3); }
.callout strong { color: var(--ink); }
.guide-aside { position: sticky; top: 6.5rem; align-self: start; display: grid; gap: 1.25rem; }
.aside-card { border: 1px solid var(--line); border-radius: var(--r-lg); padding: 1.5rem; background: #fff; box-shadow: var(--shadow-soft); text-align: center; }
.aside-card > img { width: 72px; height: 72px; border-radius: 18px; margin: 0 auto 0.9rem; }
.aside-card h4 { font-size: 1.1rem; margin-bottom: 0.35rem; }
.aside-card p { font-size: 0.875rem; margin-bottom: 1rem; }
.toc { border: 1px solid var(--line); border-radius: var(--r-lg); padding: 1.3rem 1.5rem; font-size: 0.9rem; }
.toc h4 { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.14em; color: var(--muted); margin-bottom: 0.7rem; }
.toc ul { list-style: none; display: grid; gap: 0.45rem; }
.toc a { color: var(--body); }
.toc a:hover { color: var(--ink); }

/* ---------- mini drill widget ---------- */
.drill {
  border-radius: var(--r-lg); overflow: hidden;
  border: 1px solid var(--line); background: #fff;
  box-shadow: var(--shadow-soft);
  margin: 2rem 0;
}
.drill-head { padding: 0.9rem 1.4rem; display: flex; justify-content: space-between; align-items: center; background: var(--bg-warm); border-bottom: 1px solid var(--line); font-size: 0.8125rem; font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: 0.1em; }
.drill-head .streak { color: var(--green); }
.drill-q { padding: 2.6rem 1.5rem 1rem; text-align: center; font-family: "Baloo 2", sans-serif; font-size: clamp(1.5rem, 3.4vw, 2.1rem); font-weight: 700; color: var(--ink); line-height: 1.25; }
.drill-opts { display: flex; gap: 0.8rem; justify-content: center; flex-wrap: wrap; padding: 1.4rem 1.5rem 2rem; }
.drill-opt {
  font-family: "Baloo 2", sans-serif; font-weight: 700; font-size: 1.15rem;
  color: var(--green); background: #fff;
  border: 2px solid rgba(109, 190, 42, 0.5); border-radius: 1rem;
  padding: 0.7rem 1.7rem; cursor: pointer;
  transition: transform 0.4s var(--ease-spring), border-color 0.4s var(--ease-spring), background 0.4s var(--ease-spring), color 0.4s var(--ease-spring);
}
.drill-opt:hover { transform: translateY(-2px); border-color: var(--green); background: var(--green-soft); }
.drill-opt.right { background: var(--green-soft); border-color: var(--green); color: #3E7A12; }
.drill-opt.wrong { background: var(--pink-soft); border-color: var(--pink); color: var(--pink-deep); animation: shake 0.4s var(--ease-spring); }
@keyframes shake { 25% { transform: translateX(-5px); } 75% { transform: translateX(5px); } }
.drill-q .drill-fill { padding: 0 0.15em; border-radius: 0.35em; }
.drill-q .drill-fill.ok { color: #3E7A12; background: var(--green-soft); }
.drill-q .drill-fill.no { color: var(--pink-deep); background: var(--pink-soft); }
.drill-fb { min-height: 3.4rem; padding: 0 1.5rem 1.6rem; text-align: center; font-size: 0.9375rem; }
.drill-fb strong { color: var(--ink); }
.drill-cta { padding: 1.1rem 1.5rem; border-top: 1px solid var(--line); display: flex; align-items: center; justify-content: center; gap: 1rem; flex-wrap: wrap; background: var(--bg-warm); font-size: 0.9375rem; }

/* ---------- FAQ ---------- */
.faq-list { max-width: 48rem; display: grid; gap: 0.9rem; }
.faq-item { border: 1px solid var(--line); border-radius: var(--r-lg); background: #fff; overflow: hidden; transition: box-shadow 0.5s var(--ease-spring); }
.faq-item[open] { box-shadow: var(--shadow-soft); }
.faq-item summary {
  list-style: none; cursor: pointer; display: flex; justify-content: space-between; gap: 1rem; align-items: center;
  padding: 1.25rem 1.5rem; font-weight: 700; color: var(--ink); font-size: 1.05rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .tick { flex: none; width: 1.9rem; height: 1.9rem; border-radius: 999px; background: var(--pink-soft); color: var(--pink-deep); display: inline-flex; align-items: center; justify-content: center; font-weight: 800; font-size: 1.05rem; line-height: 1; padding: 0; transition: transform 0.5s var(--ease-spring); }
.faq-item summary .tick::before { content: "+"; display: block; transform: translateY(-0.05em); }
.faq-item[open] summary .tick { transform: rotate(45deg); }
.faq-item .faq-a { padding: 0 1.5rem 1.4rem; font-size: 0.9875rem; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .guide-body { grid-template-columns: 1fr; gap: 2.5rem; }
  .guide-aside { position: static; }
  .foot-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}
@media (max-width: 768px) {
  .section { padding: 4.5rem 0; }
  .nav { gap: 0.9rem; padding: 0.5rem 0.55rem 0.5rem 0.9rem; top: 0.9rem; max-width: calc(100vw - 1.5rem); }
  .nav-links { display: none; }
  .nav-logo span { display: none; }
  .wrap { padding: 0 1.15rem; }
}