/* W4EasyGuide — Clean, mobile-first, trust-forward */
:root {
  --navy: #1e3a5f;
  --navy-dark: #14283f;
  --green: #2d9d78;
  --green-dark: #217a5c;
  --bg: #ffffff;
  --bg-soft: #f5f8fb;
  --bg-card: #ffffff;
  --text: #1a2332;
  --muted: #5a6a7e;
  --border: #e3e8ef;
  --warn-bg: #fff8e6;
  --warn-border: #f0c84a;
  --info-bg: #eaf4ff;
  --info-border: #6fb1ff;
  --radius: 10px;
  --shadow: 0 2px 10px rgba(30, 58, 95, 0.08);
  --shadow-lg: 0 6px 24px rgba(30, 58, 95, 0.12);
  --max-w: 760px;
  --max-w-wide: 1080px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-size: 17px;
}
@media (min-width: 720px) {
  body { font-size: 18px; }
}

img { max-width: 100%; height: auto; }

a { color: var(--navy); text-decoration: underline; text-underline-offset: 3px; }
a:hover { color: var(--green-dark); }

h1, h2, h3, h4 {
  color: var(--navy);
  line-height: 1.25;
  margin-top: 1.6em;
  margin-bottom: 0.5em;
}
h1 { font-size: 1.9rem; margin-top: 0.3em; }
h2 { font-size: 1.45rem; }
h3 { font-size: 1.15rem; }

@media (min-width: 720px) {
  h1 { font-size: 2.4rem; }
  h2 { font-size: 1.7rem; }
  h3 { font-size: 1.25rem; }
}

p { margin: 0 0 1.2em; }
ul, ol { padding-left: 1.35em; }
li { margin-bottom: 0.55em; line-height: 1.65; }

/* ---------- Layout ---------- */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 26px; }
.container-wide { max-width: var(--max-w-wide); margin: 0 auto; padding: 0 26px; }

@media (min-width: 720px) {
  .container { padding: 0 28px; }
  .container-wide { padding: 0 28px; }
}

/* ---------- Header ---------- */
.site-header {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
}
.site-header .inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 18px; max-width: var(--max-w-wide); margin: 0 auto;
}
.logo {
  font-weight: 800; font-size: 1.05rem; color: var(--navy);
  text-decoration: none; letter-spacing: -0.01em;
  display: flex; align-items: center; gap: 8px;
  white-space: nowrap;
}
@media (min-width: 420px) {
  .logo { font-size: 1.15rem; }
}
.logo-mark {
  background: var(--green); color: #fff;
  width: 30px; height: 30px; border-radius: 7px;
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 0.95rem;
}
.nav-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  background: none; border: 1px solid var(--border);
  width: 44px; height: 44px; border-radius: 8px;
  cursor: pointer; padding: 0;
  transition: background 0.15s;
}
.nav-toggle:hover { background: var(--bg-soft); }
.nav-toggle span {
  display: block; width: 18px; height: 2px; background: var(--navy);
  position: relative; transition: background 0.1s;
}
.nav-toggle span::before, .nav-toggle span::after {
  content: ""; position: absolute; left: 0; width: 18px; height: 2px; background: var(--navy);
  transition: transform 0.2s, top 0.2s;
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after { top: 0; transform: rotate(-45deg); }
.site-nav {
  display: none;
}
.site-nav.open {
  display: block;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 6px 22px 14px;
  box-shadow: 0 10px 24px rgba(20, 40, 63, 0.08);
  z-index: 99;
}
.site-nav a {
  display: block; padding: 14px 2px; color: var(--text);
  text-decoration: none; border-bottom: 1px solid var(--border);
  font-weight: 500; font-size: 1rem;
}
.site-nav a:last-child { border-bottom: none; }

@media (min-width: 880px) {
  .nav-toggle { display: none; }
  .site-nav,
  .site-nav.open {
    display: flex !important; gap: 22px; padding: 0; border: none;
    background: transparent; position: static; box-shadow: none;
  }
  .site-nav a {
    padding: 0; border: none; font-size: 0.98rem;
  }
  .site-nav a:hover { color: var(--green-dark); }
}

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(180deg, #f5f8fb 0%, #ffffff 100%);
  padding: 38px 0 24px;
  text-align: center;
}
.hero h1 { margin-top: 0; }
.hero .sub {
  color: var(--muted); font-size: 1.08rem; max-width: 560px;
  margin: 0 auto 18px;
}
.hero .trust {
  display: inline-flex; align-items: center; gap: 6px;
  background: #e7f4ee; color: var(--green-dark);
  padding: 5px 12px; border-radius: 20px; font-size: 0.85rem;
  font-weight: 600; margin-bottom: 14px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--green); color: #fff;
  padding: 14px 22px; border-radius: var(--radius);
  font-weight: 700; font-size: 1rem;
  border: none; cursor: pointer; text-decoration: none;
  transition: background 0.15s, transform 0.05s;
  min-height: 48px; /* touch target */
}
.btn:hover { background: var(--green-dark); color: #fff; }
.btn:active { transform: translateY(1px); }
.btn.btn-lg { padding: 16px 28px; font-size: 1.08rem; }
.btn.btn-secondary {
  background: #fff; color: var(--navy); border: 2px solid var(--navy);
}
.btn.btn-secondary:hover { background: var(--navy); color: #fff; }
.btn.btn-ghost {
  background: transparent; color: var(--muted); font-weight: 600;
}
.btn.btn-ghost:hover { color: var(--navy); background: var(--bg-soft); }

/* ---------- Wizard ---------- */
.wizard {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
  padding: 24px 20px;
  margin: 20px auto 30px;
  max-width: 620px;
}
.wizard-progress {
  display: flex; gap: 4px; margin-bottom: 20px;
}
.wizard-progress .step {
  flex: 1; height: 4px; background: var(--border); border-radius: 2px;
  transition: background 0.2s;
}
.wizard-progress .step.done { background: var(--green); }
.wizard-progress .step.current { background: var(--navy); }
.wizard-step { display: none; }
.wizard-step.active { display: block; animation: slide 0.25s ease-out; }
@keyframes slide {
  from { opacity: 0; transform: translateX(8px); }
  to { opacity: 1; transform: translateX(0); }
}
.wizard h2 {
  margin-top: 0; font-size: 1.3rem;
}
.wizard .question-hint {
  color: var(--muted); font-size: 0.95rem; margin-bottom: 18px;
}
.choice-group { display: flex; flex-direction: column; gap: 10px; margin-bottom: 22px; }
.choice {
  display: flex; align-items: flex-start; gap: 12px;
  border: 2px solid var(--border); border-radius: var(--radius);
  padding: 14px 16px; cursor: pointer;
  background: #fff;
  transition: border 0.12s, background 0.12s;
  min-height: 56px;
}
.choice:hover { border-color: var(--navy); background: var(--bg-soft); }
.choice input[type="radio"] {
  appearance: none; -webkit-appearance: none;
  width: 20px; height: 20px; border: 2px solid var(--border);
  border-radius: 50%; margin: 2px 0 0; flex-shrink: 0;
  cursor: pointer; position: relative;
}
.choice input[type="radio"]:checked {
  border-color: var(--green);
}
.choice input[type="radio"]:checked::after {
  content: ""; position: absolute; top: 3px; left: 3px;
  width: 10px; height: 10px; background: var(--green); border-radius: 50%;
}
.choice:has(input:checked) {
  border-color: var(--green); background: #f0f9f4;
}
.choice .choice-label { font-weight: 600; color: var(--text); }
.choice .choice-desc { color: var(--muted); font-size: 0.9rem; display: block; margin-top: 2px; }

.number-input {
  width: 100%; padding: 14px 16px;
  border: 2px solid var(--border); border-radius: var(--radius);
  font-size: 1.1rem; font-family: inherit; color: var(--text);
  margin-bottom: 20px;
  min-height: 48px;
}
.number-input:focus { outline: none; border-color: var(--green); }

.wizard-nav {
  display: flex; gap: 10px; justify-content: space-between;
  margin-top: 8px;
}
.wizard-nav .btn { flex: 1; }
.wizard-nav .btn.back { flex: 0 0 auto; }

/* ---------- Result ---------- */
.result-card {
  background: linear-gradient(180deg, #f0f9f4 0%, #fff 100%);
  border: 2px solid var(--green);
  border-radius: 14px;
  padding: 24px 20px;
  margin: 20px auto;
  max-width: 620px;
}
.result-card h2 { color: var(--green-dark); margin-top: 0; }
.result-card .big-answer {
  background: #fff;
  border-radius: var(--radius);
  padding: 18px;
  margin: 14px 0;
  border: 1px solid var(--border);
}
.result-card .big-answer strong {
  display: block; color: var(--navy); font-size: 1.15rem; margin-bottom: 4px;
}
.result-step {
  background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px; margin-bottom: 10px;
}
.result-step .label {
  font-size: 0.8rem; color: var(--muted); text-transform: uppercase;
  letter-spacing: 0.04em; font-weight: 700;
}
.result-step .value {
  display: block; color: var(--navy); font-weight: 700; font-size: 1.05rem;
  margin-top: 3px;
}
.result-step .note { color: var(--muted); font-size: 0.9rem; margin-top: 4px; }

/* ---------- Callouts ---------- */
.callout {
  border-radius: var(--radius); padding: 14px 16px;
  margin: 18px 0;
  border: 1px solid;
}
.callout.warn { background: var(--warn-bg); border-color: var(--warn-border); }
.callout.info { background: var(--info-bg); border-color: var(--info-border); }
.callout strong { display: block; margin-bottom: 4px; }

/* ---------- Content pages ---------- */
.page { padding: 26px 0 40px; }
.page p, .page li { max-width: 64ch; }
.page h1 { margin-top: 0.2em; }
.page .lead {
  font-size: 1.15rem; color: var(--muted); margin-bottom: 20px;
}
.page .updated { color: var(--muted); font-size: 0.88rem; margin-bottom: 20px; }
.page .toc {
  background: var(--bg-soft); border-radius: var(--radius);
  padding: 14px 18px; margin: 16px 0 24px;
}
.page .toc strong { display: block; margin-bottom: 6px; color: var(--navy); }
.page .toc ul { margin: 0; padding-left: 1.1em; }
.page .toc li { margin-bottom: 3px; }

.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
}
.faq-item summary {
  cursor: pointer; font-weight: 700; color: var(--navy);
  font-size: 1.05rem; padding: 6px 0; list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::before {
  content: "+"; display: inline-block; width: 20px; color: var(--green);
  font-weight: 800;
}
.faq-item[open] summary::before { content: "−"; }
.faq-item .faq-answer { padding: 4px 0 8px 20px; }

/* ---------- AdSense slots ---------- */
.ad-slot {
  display: flex; align-items: center; justify-content: center;
  margin: 24px auto; min-height: 100px; max-width: 728px;
  background: transparent;
}
.ad-slot-label {
  text-align: center; font-size: 0.72rem; color: var(--muted);
  text-transform: uppercase; letter-spacing: 0.06em;
  margin-bottom: 4px;
}

/* ---------- Feature grid ---------- */
.feature-grid {
  display: grid; gap: 14px; margin: 24px 0;
  grid-template-columns: 1fr;
}
@media (min-width: 640px) {
  .feature-grid { grid-template-columns: repeat(3, 1fr); }
}
.feature {
  background: var(--bg-soft); border-radius: var(--radius);
  padding: 18px; text-align: center;
}
.feature .icon {
  font-size: 1.8rem; margin-bottom: 8px; display: block;
}
.feature h3 { margin: 6px 0; font-size: 1rem; }
.feature p { color: var(--muted); font-size: 0.92rem; margin: 0; }

/* ---------- Comparison table ---------- */
.compare-table {
  width: 100%; border-collapse: collapse; margin: 16px 0 24px;
  font-size: 0.95rem;
}
.compare-table th, .compare-table td {
  padding: 12px 10px; text-align: left; border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.compare-table th { background: var(--bg-soft); color: var(--navy); font-weight: 700; }

/* ---------- Related links ---------- */
.related {
  background: var(--bg-soft); border-radius: var(--radius);
  padding: 18px; margin: 30px 0;
}
.related strong { color: var(--navy); display: block; margin-bottom: 8px; }
.related ul { margin: 0; padding-left: 1.1em; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--navy); color: #c8d4e3;
  padding: 32px 0 22px; margin-top: 40px;
  font-size: 0.92rem;
}
.site-footer .cols {
  display: grid; gap: 24px; grid-template-columns: 1fr;
  margin-bottom: 22px;
}
@media (min-width: 720px) {
  .site-footer .cols { grid-template-columns: 1.3fr 1fr 1fr; }
}
.site-footer h4 {
  color: #fff; font-size: 0.92rem; margin: 0 0 10px;
  text-transform: uppercase; letter-spacing: 0.04em;
}
.site-footer a { color: #c8d4e3; text-decoration: none; }
.site-footer a:hover { color: #fff; text-decoration: underline; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer ul li { margin-bottom: 6px; }
.site-footer .disclaimer {
  border-top: 1px solid #2a4468; padding-top: 16px;
  color: #93a4bc; font-size: 0.82rem; line-height: 1.5;
}
.site-footer .copyright {
  margin-top: 10px; color: #93a4bc; font-size: 0.82rem;
}

/* ---------- Utilities ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mt-2 { margin-top: 20px; }
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: 20px; }
.hide-mobile { display: none; }
@media (min-width: 720px) { .hide-mobile { display: initial; } }

/* ---------- Skip link (accessibility) ---------- */
.skip-link {
  position: absolute; top: -40px; left: 0;
  background: var(--navy); color: #fff; padding: 8px 14px;
  text-decoration: none;
}
.skip-link:focus { top: 0; }