*,
*::before,
*::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --blue-50: #eff6ff;
  --blue-100: #dbeafe;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;
  --blue-800: #1e40af;
  --indigo-800: #3730a3;
  --green-50: #f0fdf4;
  --green-100: #dcfce7;
  --green-500: #22c55e;
  --green-600: #16a34a;
  --green-700: #15803d;
  --purple-50: #faf5ff;
  --purple-100: #f3e8ff;
  --purple-600: #9333ea;
  --orange-50: #fff7ed;
  --orange-100: #ffedd5;
  --orange-600: #ea580c;
  --pink-50: #fdf2f8;
  --pink-100: #fce7f3;
  --pink-600: #db2777;
  --indigo-50: #eef2ff;
  --indigo-100: #e0e7ff;
  --indigo-600: #4f46e5;
  --gray-50: #f9fafb;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
}

html { scroll-behavior: smooth; scroll-padding-top: 72px; }

body {
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--gray-50);
  color: var(--gray-900);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }

.container { max-width: 80rem; margin: 0 auto; padding: 0 1rem; }
.container-md { max-width: 56rem; margin: 0 auto; padding: 0 1rem; }
@media (min-width: 640px) { .container, .container-md { padding: 0 1.5rem; } }
@media (min-width: 1024px) { .container, .container-md { padding: 0 2rem; } }

/* ---------- Navbar ---------- */
.navbar {
  background: linear-gradient(to right, var(--blue-600), var(--blue-700));
  box-shadow: 0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -4px rgba(0,0,0,.1);
  position: sticky;
  top: 0;
  z-index: 50;
}
.navbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 4rem;
}
.brand { color: #fff; font-size: 1.25rem; font-weight: 700; transition: color .2s; }
.brand:hover { color: var(--blue-100); }
.brand i { margin-right: .5rem; }

.nav-links { display: none; align-items: center; gap: 1.5rem; }
.nav-links a { color: #fff; font-weight: 500; transition: color .2s; }
.nav-links a:hover { color: var(--blue-100); }

.btn-nav {
  background: #fff;
  color: var(--blue-600) !important;
  padding: .5rem 1rem;
  border-radius: .5rem;
  font-weight: 600 !important;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,.1);
  transition: all .2s;
}
.btn-nav:hover { background: var(--blue-50); color: var(--blue-600) !important; box-shadow: 0 10px 15px -3px rgba(0,0,0,.15); }
.btn-nav i { margin-right: .5rem; }

.menu-toggle {
  background: none;
  border: 0;
  color: #fff;
  font-size: 1.25rem;
  padding: .5rem;
  border-radius: .375rem;
  cursor: pointer;
}
.menu-toggle:focus-visible { outline: 2px solid #fff; }

.mobile-menu { display: none; padding-bottom: 1rem; }
.mobile-menu.open { display: flex; flex-direction: column; gap: .75rem; }
.mobile-menu a { color: #fff; font-weight: 500; }
.mobile-menu .btn-nav { display: inline-block; text-align: center; }

@media (min-width: 768px) {
  .nav-links { display: flex; }
  .menu-toggle, .mobile-menu, .mobile-menu.open { display: none; }
}

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(to bottom right, var(--blue-600), var(--blue-700), var(--indigo-800));
  color: #fff;
  padding: 4rem 0;
  text-align: center;
}
.hero h1 {
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
}
.hero p {
  font-size: 1.25rem;
  color: var(--blue-100);
  max-width: 48rem;
  margin: 0 auto 2rem;
}
@media (min-width: 768px) { .hero h1 { font-size: 3rem; } .hero p { font-size: 1.5rem; } }
@media (min-width: 1024px) { .hero h1 { font-size: 3.75rem; } }

.btn-hero {
  display: inline-block;
  background: #fff;
  color: var(--blue-600);
  padding: 1rem 2rem;
  border-radius: .5rem;
  font-size: 1.125rem;
  font-weight: 700;
  box-shadow: 0 20px 25px -5px rgba(0,0,0,.2), 0 8px 10px -6px rgba(0,0,0,.2);
  transition: all .2s;
}
.btn-hero:hover { background: var(--blue-50); transform: scale(1.05); box-shadow: 0 25px 50px -12px rgba(0,0,0,.3); }
.btn-hero i, .btn-green i { margin-right: .5rem; }

.btn-green {
  display: inline-block;
  background: linear-gradient(to right, var(--green-500), var(--green-600));
  color: #fff;
  padding: 1rem 2rem;
  border-radius: .5rem;
  font-size: 1.125rem;
  font-weight: 700;
  box-shadow: 0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -4px rgba(0,0,0,.1);
  transition: all .2s;
}
.btn-green:hover {
  background: linear-gradient(to right, var(--green-600), var(--green-700));
  transform: scale(1.05);
  box-shadow: 0 20px 25px -5px rgba(0,0,0,.15);
}

/* ---------- Sections ---------- */
section { padding: 3rem 0; }
.bg-white { background: #fff; }
.bg-gray { background: var(--gray-50); }
.section-lg { padding: 4rem 0; }

.intro p { font-size: 1.125rem; color: var(--gray-700); line-height: 1.625; }
.intro a { color: var(--blue-600); font-weight: 500; }
.intro a:hover { color: var(--blue-800); }

.section-head { text-align: center; margin-bottom: 3rem; }
.section-head h2 { font-size: 1.875rem; font-weight: 700; color: var(--gray-900); margin-bottom: 1rem; }
.section-head p { font-size: 1.125rem; color: var(--gray-600); max-width: 48rem; margin: 0 auto; }
@media (min-width: 768px) { .section-head h2 { font-size: 2.25rem; } }
.section-head.compact { margin-bottom: 0; }
.section-head.compact .text { max-width: 48rem; margin: 0 auto; }
.section-head.compact p { color: var(--gray-700); line-height: 1.625; }
.section-head a { color: var(--blue-600); font-weight: 500; }
.section-head a:hover { color: var(--blue-800); }
.credits h2 { font-size: 1.5rem; }
.credits p { color: var(--gray-700); }
@media (min-width: 768px) { .credits h2 { font-size: 1.875rem; } }

/* ---------- TOC ---------- */
.toc {
  background: #fff;
  border-radius: .75rem;
  border: 1px solid var(--gray-200);
  box-shadow: 0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -4px rgba(0,0,0,.1);
  overflow: hidden;
}
.toc-title {
  background: linear-gradient(to right, var(--blue-600), var(--blue-700));
  color: #fff;
  padding: 1rem 1.5rem;
  font-size: 1.5rem;
  font-weight: 700;
}
.toc a {
  display: block;
  padding: 1rem 1.5rem;
  font-weight: 600;
  color: var(--gray-800);
  border-top: 1px solid var(--gray-200);
  transition: all .2s;
}
.toc a:first-of-type { border-top: 0; }
.toc a:hover { background: var(--blue-50); color: var(--blue-600); }
.toc a i { margin-right: .75rem; color: var(--blue-600); width: 1.1em; text-align: center; }

/* ---------- Feature cards ---------- */
.features-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; }
@media (min-width: 768px) { .features-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .features-grid { grid-template-columns: repeat(3, 1fr); } }

.feature {
  border-radius: .75rem;
  padding: 1.5rem;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -2px rgba(0,0,0,.1);
  transition: box-shadow .2s;
}
.feature:hover { box-shadow: 0 20px 25px -5px rgba(0,0,0,.1), 0 8px 10px -6px rgba(0,0,0,.1); }
.feature .icon { font-size: 2.25rem; margin-bottom: 1rem; line-height: 1; }
.feature h3 { font-size: 1.25rem; font-weight: 700; color: var(--gray-900); margin-bottom: .5rem; }
.feature p { color: var(--gray-700); }

.f-blue   { background: linear-gradient(to bottom right, var(--blue-50), var(--blue-100)); }
.f-blue .icon { color: var(--blue-600); }
.f-green  { background: linear-gradient(to bottom right, var(--green-50), var(--green-100)); }
.f-green .icon { color: var(--green-600); }
.f-purple { background: linear-gradient(to bottom right, var(--purple-50), var(--purple-100)); }
.f-purple .icon { color: var(--purple-600); }
.f-orange { background: linear-gradient(to bottom right, var(--orange-50), var(--orange-100)); }
.f-orange .icon { color: var(--orange-600); }
.f-pink   { background: linear-gradient(to bottom right, var(--pink-50), var(--pink-100)); }
.f-pink .icon { color: var(--pink-600); }
.f-indigo { background: linear-gradient(to bottom right, var(--indigo-50), var(--indigo-100)); }
.f-indigo .icon { color: var(--indigo-600); }

/* ---------- Steps ---------- */
.steps { display: flex; flex-direction: column; gap: 2rem; max-width: 64rem; margin: 0 auto; }
.step {
  background: #fff;
  border-radius: .75rem;
  padding: 1.5rem;
  box-shadow: 0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -4px rgba(0,0,0,.1);
  transition: box-shadow .2s;
}
.step:hover { box-shadow: 0 20px 25px -5px rgba(0,0,0,.1), 0 8px 10px -6px rgba(0,0,0,.1); }
.step-head { display: flex; align-items: center; margin-bottom: .75rem; }
.step-num {
  background: var(--blue-600);
  color: #fff;
  border-radius: 9999px;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  margin-right: .75rem;
  flex-shrink: 0;
}
.step h3 { font-size: 1.25rem; font-weight: 700; color: var(--gray-900); }
.step p { color: var(--gray-700); }

/* ---------- Footer ---------- */
footer {
  background: linear-gradient(to right, var(--gray-800), var(--gray-900));
  color: #fff;
  padding: 2rem 0;
  text-align: center;
}
footer .note { color: var(--gray-300); }
.footer-links { margin-top: 1rem; display: flex; justify-content: center; gap: 1.5rem; }
.footer-links a { color: var(--gray-300); transition: color .2s; }
.footer-links a:hover { color: #fff; }
.copyright { margin-top: 1rem; font-size: .875rem; color: var(--gray-400); }

/* ================= Inner pages ================= */
.breadcrumb-bar { background: #fff; }
.breadcrumb { display: flex; align-items: center; gap: .5rem; font-size: .75rem; padding: .5rem 0; color: var(--gray-700); }
.breadcrumb a { color: var(--blue-600); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb i.sep { font-size: .55rem; color: var(--gray-400); }
.breadcrumb a i { margin-right: .25rem; }
.theme-purple .breadcrumb a { color: var(--purple-600); }

.page { padding: 3rem 0 4rem; }
.page-title { font-size: 2.25rem; font-weight: 700; color: var(--gray-900); line-height: 1.2; margin-bottom: 1.5rem; }
.page-sub { font-size: 1.125rem; color: var(--gray-700); margin-bottom: 2.5rem; }
@media (min-width: 768px) { .page-title { font-size: 2.5rem; } }

.card {
  background: #fff;
  border-radius: .75rem;
  padding: 2rem 1.5rem;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,.08), 0 2px 4px -2px rgba(0,0,0,.08);
  margin-bottom: 1.5rem;
}
@media (min-width: 640px) { .card { padding: 2.25rem; } }
.card p { color: var(--gray-700); line-height: 1.7; }
.card p + p { margin-top: 1rem; }
.card a.link { color: var(--blue-600); font-weight: 500; }
.card a.link:hover { color: var(--blue-800); }
.card h2 { font-size: 1.25rem; font-weight: 700; color: var(--gray-900); margin-bottom: 1rem; display: flex; align-items: center; gap: .75rem; }
.card h2 i { color: var(--blue-600); }
.card.tint { background: var(--gray-50); }

.check-list { list-style: none; display: flex; flex-direction: column; gap: .75rem; font-size: .875rem; color: var(--gray-700); }
.check-list li { display: flex; align-items: baseline; gap: .65rem; }
.check-list i { color: var(--green-600); flex-shrink: 0; }
.check-list strong { color: var(--gray-900); font-weight: 600; }

.cta-box {
  background: linear-gradient(to right, var(--blue-600), #4338ca);
  color: #fff;
  border-radius: 1rem;
  padding: 2.5rem 1.5rem;
  text-align: center;
}
.cta-box h2 { font-size: 1.5rem; font-weight: 700; margin-bottom: 1rem; }
.cta-box p { color: #e0e7ff; margin-bottom: 1.5rem; }
.cta-box .btn-white {
  display: inline-block;
  background: #fff;
  color: var(--blue-600);
  font-weight: 700;
  padding: .85rem 1.75rem;
  border-radius: .6rem;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,.15);
  transition: all .2s;
}
.cta-box .btn-white:hover { background: var(--blue-50); transform: scale(1.04); }
.cta-box .btn-white i { margin-right: .5rem; }

.footer-links.wide a { font-size: 1rem; }

/* ---------- Peace page ---------- */
.theme-purple .page-hero {
  background: linear-gradient(to bottom right, #3b82f6, var(--blue-600), #4f46e5);
  color: #fff;
  text-align: center;
  padding: 4rem 0;
}
.page-hero h1 { font-size: 2.25rem; font-weight: 700; margin-bottom: 1.5rem; }
.page-hero p { font-size: 1.25rem; color: var(--blue-100); max-width: 40rem; margin: 0 auto; }
@media (min-width: 768px) { .page-hero h1 { font-size: 3rem; } }

.peace-body { padding: 3rem 0 4rem; }
.theme-purple .card.intro-card h2 { font-size: 1.5rem; display: block; }
.theme-purple .card a.link { color: var(--purple-600); }
.theme-purple .card a.link:hover { color: #6b21a8; }

.h-section { text-align: center; font-size: 1.5rem; font-weight: 700; color: var(--gray-900); margin: 3rem 0 2rem; }

.mini-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; max-width: 66rem; margin: 0 auto; }
@media (min-width: 640px) { .mini-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px) { .mini-grid { grid-template-columns: repeat(3, 1fr); } }
.mini-grid.two { max-width: 66rem; }
@media (min-width: 900px) { .mini-grid.two { grid-template-columns: repeat(2, 1fr); } }

.mini {
  background: #fff;
  border-radius: .75rem;
  padding: 1.25rem;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,.08), 0 2px 4px -2px rgba(0,0,0,.08);
}
.mini-head { display: flex; align-items: center; gap: .75rem; margin-bottom: .75rem; }
.mini-head i { font-size: 1.4rem; width: 1.6rem; text-align: center; }
.mini-head h3 { font-size: 1rem; font-weight: 600; color: var(--gray-900); }
.mini p { font-size: .8rem; color: var(--gray-700); line-height: 1.6; }
.mini .intro-line { margin-bottom: 1rem; }
.mini .check-list { font-size: .8rem; gap: .6rem; }
.mini .check-list i { color: var(--purple-600); font-size: .75rem; }

.c-purple { color: var(--purple-600); }
.c-indigo { color: var(--indigo-600); }
.c-pink { color: var(--pink-600); }
.c-blue { color: var(--blue-600); }
.c-green { color: var(--green-600); }
.c-orange { color: var(--orange-600); }

.install { max-width: 42.5rem; margin: 3rem auto 0; }
.install h2 { text-align: center; font-size: 1.5rem; font-weight: 700; margin-bottom: 1.5rem; display: block; }
.prereq {
  background: var(--blue-50);
  border-left: 4px solid var(--blue-600);
  border-radius: .5rem;
  padding: 1.25rem;
  margin-bottom: 2rem;
}
.prereq h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: .5rem; color: var(--gray-900); }
.prereq h3 i { color: var(--blue-600); margin-right: .5rem; }
.prereq p { font-size: .9rem; margin-bottom: 1rem; }
.btn-blue {
  display: inline-block;
  background: var(--blue-600);
  color: #fff;
  font-weight: 600;
  font-size: .9rem;
  padding: .6rem 1.1rem;
  border-radius: .5rem;
  transition: background .2s;
}
.btn-blue:hover { background: var(--blue-700); }
.btn-blue i { margin-right: .5rem; }

.num-steps { display: flex; flex-direction: column; gap: 1.5rem; }
.num-step { display: flex; gap: 1rem; }
.num-step .step-num { margin-right: 0; background: var(--purple-600); }
.num-step h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: .35rem; color: var(--gray-900); }
.num-step p { font-size: .9rem; }
code { background: var(--gray-200); padding: .1rem .35rem; border-radius: .25rem; font-size: .85em; }

.note-warn {
  background: #fffbeb;
  border-left: 4px solid #f59e0b;
  border-radius: .5rem;
  padding: 1.1rem 1.25rem;
  margin-top: 2rem;
}
.note-warn h3 { font-size: 1rem; font-weight: 700; margin-bottom: .4rem; color: var(--gray-900); }
.note-warn h3 i { color: #d97706; margin-right: .5rem; }
.note-warn p { font-size: .875rem; }

.perfect { display: grid; grid-template-columns: 1fr; gap: 1.5rem; max-width: 66rem; margin: 0 auto; }
@media (min-width: 768px) { .perfect { grid-template-columns: repeat(3, 1fr); } }
.perfect .mini { text-align: center; padding: 1.75rem 1.25rem; }
.perfect .mini i { font-size: 1.75rem; margin-bottom: .75rem; }
.perfect .mini h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: .5rem; }

.faq { max-width: 42.5rem; margin: 0 auto; display: flex; flex-direction: column; gap: 1rem; }
.faq .mini h3 { font-size: 1rem; font-weight: 600; margin-bottom: .5rem; color: var(--gray-900); }
.faq .mini p { font-size: .875rem; }

.peace-cta { max-width: 42.5rem; margin: 3.5rem auto 0; }

/* ---------- HeSuVi page ---------- */
.theme-hesuvi .page-hero { background: linear-gradient(to bottom right, #3b82f6, var(--blue-600), #0891b2); color: #fff; text-align: center; padding: 4rem 0; }
.theme-hesuvi .breadcrumb a { color: var(--blue-600); }
.theme-hesuvi .card a.link { color: var(--blue-600); }
.theme-hesuvi .card.intro-card h2 { font-size: 1.5rem; display: block; }
.theme-hesuvi .num-step .step-num { background: #9333ea; }
.step-num.indigo { background: #4f46e5 !important; }
.theme-hesuvi .mini .check-list i { color: var(--green-600); }
.c-teal { color: #0891b2; }

.how-card { max-width: 42.5rem; margin: 3rem auto 0; background: var(--gray-50); border-radius: .75rem; padding: 2rem; box-shadow: 0 4px 6px -1px rgba(0,0,0,.08); }
.how-card h2 { font-size: 1.5rem; font-weight: 700; margin-bottom: 1.5rem; }
.how-card .num-step p { font-size: .8rem; line-height: 1.7; }
.how-card .num-step h3 { font-size: .95rem; }

.algo-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem 1rem;
  max-width: 66rem;
  margin: 0 auto;
  background: #fff;
  border-radius: .75rem;
  padding: 2rem 1rem;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,.08), 0 2px 4px -2px rgba(0,0,0,.08);
  text-align: center;
  font-size: .8rem;
  font-weight: 600;
  color: var(--gray-900);
}

.why-card { max-width: 42.5rem; margin: 3.5rem auto 0; background: var(--gray-50); border-radius: .75rem; padding: 1.75rem; box-shadow: 0 4px 6px -1px rgba(0,0,0,.08); }
.why-card h2 { font-size: 1.5rem; font-weight: 700; margin-bottom: 1.25rem; }
.why-list { list-style: none; display: flex; flex-direction: column; gap: 1rem; }
.why-list li { display: flex; gap: .85rem; align-items: flex-start; }
.why-list i { color: var(--green-600); font-size: 1.15rem; margin-top: .1rem; }
.why-list strong { display: block; font-size: .9rem; font-weight: 600; color: var(--gray-900); }
.why-list span { font-size: .8rem; color: var(--gray-700); }

.notes-card { max-width: 42.5rem; margin: 2.5rem auto 0; background: #fff7ed; border-radius: .75rem; padding: 1.25rem 1.5rem; }
.notes-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 1rem; color: var(--gray-900); }
.notes-card h3 i { color: var(--orange-600); margin-right: .6rem; }
.notes-card ul { list-style: none; display: flex; flex-direction: column; gap: .5rem; font-size: .8rem; color: var(--gray-700); }
.notes-card li { display: flex; gap: .65rem; align-items: baseline; }
.notes-card li i { color: var(--orange-600); font-size: .7rem; }

.cta-box.purple { background: linear-gradient(to right, #4f46e5, #7e22ce); max-width: 42.5rem; margin: 2.5rem auto 0; }
.prereq a.arrow { font-weight: 600; font-size: .8rem; color: var(--blue-600); }
.prereq a.arrow i { margin-left: .35rem; }
.prereq a.arrow:hover { color: var(--blue-800); }
@media (min-width: 640px) { .algo-grid { padding: 2rem; } }

/* ---------- Contact page ---------- */
.page-center { text-align: center; }
.info-box { background: var(--blue-50); border-radius: .75rem; padding: 1.25rem 1.5rem; display: flex; gap: .85rem; margin-bottom: 1.5rem; }
.info-box > i { color: var(--blue-600); font-size: 1.15rem; margin-top: .1rem; }
.info-box h2 { font-size: 1rem; font-weight: 600; color: var(--gray-900); margin-bottom: .5rem; }
.info-box p { font-size: .8rem; color: var(--gray-700); line-height: 1.7; }

.form-card { background: #fff; border-radius: .75rem; padding: 2rem 1.5rem; box-shadow: 0 4px 6px -1px rgba(0,0,0,.08), 0 2px 4px -2px rgba(0,0,0,.08); }
@media (min-width: 640px) { .form-card { padding: 2.25rem; } }
.field { margin-bottom: 1.5rem; }
.field label { display: flex; align-items: center; gap: .5rem; font-size: .75rem; font-weight: 600; color: var(--gray-900); margin-bottom: .6rem; }
.field label i { color: var(--blue-600); }
.field input, .field select, .field textarea {
  width: 100%;
  font: inherit;
  font-size: .8rem;
  padding: .7rem .75rem;
  border: 1px solid var(--gray-300);
  border-radius: .5rem;
  background: #fff;
  color: var(--gray-900);
  transition: border-color .2s, box-shadow .2s;
}
.field select { background: var(--gray-50); }
.field textarea { resize: vertical; min-height: 7rem; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--blue-600); box-shadow: 0 0 0 3px rgba(37,99,235,.2); }
.form-actions { text-align: center; }
.btn-submit {
  font: inherit;
  font-size: .8rem;
  font-weight: 600;
  background: var(--blue-600);
  color: #fff;
  border: 0;
  border-radius: .5rem;
  padding: .85rem 1.75rem;
  cursor: pointer;
  box-shadow: 0 6px 10px -2px rgba(37,99,235,.35);
  transition: all .2s;
}
.btn-submit:hover { background: var(--blue-700); transform: translateY(-1px); }
.btn-submit i { margin-right: .5rem; }

.help-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; margin-top: 3rem; padding: 0 .25rem; }
@media (min-width: 640px) { .help-grid { grid-template-columns: repeat(2, 1fr); } }
.help h3 { display: flex; align-items: center; gap: .75rem; font-size: 1rem; font-weight: 600; margin-bottom: .75rem; color: var(--gray-900); }
.help h3 i { font-size: 1.25rem; }
.help p { font-size: .8rem; color: var(--gray-700); line-height: 1.7; margin-bottom: .75rem; }
.help a { font-size: .75rem; font-weight: 600; }
.help a i { margin-left: .35rem; }
.help.green h3 i, .help.green a { color: var(--green-600); }
.help.purple h3 i, .help.purple a { color: var(--purple-600); }