:root {
  --color-bg: #f7f8fa;
  --color-surface: #ffffff;
  --color-primary: #0b5fff;
  --color-primary-dark: #0847c4;
  --color-accent: #00b37e;
  --color-text: #1a1d23;
  --color-text-muted: #5c6370;
  --color-border: #e3e6eb;
  --color-danger: #d64545;
  --radius: 12px;
  --max-width: 1080px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.55;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--color-text);
  text-decoration: none;
}
.logo span { color: var(--color-primary); }
.main-nav { display: flex; align-items: center; gap: 24px; }
.main-nav a { color: var(--color-text); font-weight: 500; text-decoration: none; }
.main-nav a:hover { color: var(--color-primary); }
.nav-cta {
  background: var(--color-primary);
  color: #fff !important;
  padding: 8px 16px;
  border-radius: 8px;
  font-weight: 600 !important;
}
.nav-cta:hover { background: var(--color-primary-dark); }

/* Hero */
.hero {
  padding: 56px 0 32px;
  text-align: center;
}
.hero-icon {
  display: flex;
  justify-content: center;
  margin-bottom: 16px;
}
.hero-icon-bg { fill: #eef4ff; }
.hero-icon-line {
  fill: none;
  stroke: var(--color-primary);
  stroke-width: 5;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.hero-icon-fill { fill: var(--color-primary); }
.hero-icon-wheel { fill: var(--color-primary-dark); }

.hero h1 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  margin: 0 0 12px;
  font-weight: 800;
}
.hero-sub {
  max-width: 640px;
  margin: 0 auto;
  color: var(--color-text-muted);
  font-size: 1.05rem;
}

/* Calculator */
.calculator-section { padding: 24px 0 48px; }
.calc-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
@media (min-width: 860px) {
  .calc-grid { grid-template-columns: 1fr 1fr; align-items: start; }
}

.calc-card, .result-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
}

.calc-card h2, .result-card h2 { margin-top: 0; }

fieldset {
  border: none;
  padding: 0;
  margin: 0 0 20px;
}
legend {
  font-weight: 700;
  padding: 0;
  margin-bottom: 10px;
  font-size: 0.95rem;
  color: var(--color-primary-dark);
}

label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin: 12px 0 4px;
}
label:first-of-type { margin-top: 0; }

input[type="number"] {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
}
input[type="number"]:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(11,95,255,0.12);
}

.hint {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin: 6px 0 0;
}

.btn-primary {
  width: 100%;
  background: var(--color-primary);
  color: #fff;
  border: none;
  padding: 14px 20px;
  border-radius: 8px;
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  margin-top: 8px;
}
.btn-primary:hover { background: var(--color-primary-dark); }

.btn-secondary {
  display: inline-block;
  background: var(--color-accent);
  color: #fff !important;
  padding: 12px 20px;
  border-radius: 8px;
  font-weight: 700;
  text-decoration: none !important;
  margin-top: 10px;
}
.btn-secondary:hover { opacity: 0.9; }

/* Results */
.result-highlight {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 20px;
}
.result-box {
  background: #eef4ff;
  border-radius: 10px;
  padding: 16px;
  text-align: center;
}
.result-label {
  display: block;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-weight: 600;
  margin-bottom: 4px;
}
.result-value {
  display: block;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--color-primary-dark);
}

.result-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 16px;
  font-size: 0.95rem;
}
.result-table td {
  padding: 8px 4px;
  border-bottom: 1px solid var(--color-border);
}
.result-table td:last-child { text-align: right; font-weight: 600; }
.result-table .total-row td {
  border-top: 2px solid var(--color-text);
  border-bottom: none;
  font-weight: 800;
  font-size: 1.05rem;
  padding-top: 12px;
}

.result-note {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-style: italic;
}

.cta-box {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px dashed var(--color-border);
  text-align: center;
}
.cta-box p { margin: 0 0 4px; font-weight: 600; }

.email-capture {
  margin-top: 20px;
  padding: 16px;
  background: #f5f9ff;
  border-radius: 10px;
  text-align: center;
}
.email-capture h3 {
  margin: 0 0 12px;
  font-size: 0.98rem;
}
.lead-form {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.lead-form[hidden] {
  display: none;
}
@media (min-width: 480px) {
  .lead-form { flex-direction: row; }
}
.lead-form input[type="email"] {
  flex: 1;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: inherit;
}
.lead-form .btn-primary {
  width: auto;
  white-space: nowrap;
  margin-top: 0;
  padding: 10px 18px;
}
.lead-note {
  margin: 8px 0 0;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-accent);
}

/* Explain section */
.explain-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 40px 0 56px;
}
.explain-section h2 { margin-top: 0; }
.explain-section p { color: var(--color-text-muted); max-width: 760px; }

/* Footer */
.site-footer {
  padding: 24px 0;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}
.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
@media (min-width: 640px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
  }
}
.footer-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}
.footer-links a {
  color: var(--color-text-muted);
}
.footer-links a:hover { color: var(--color-primary); }

/* 404 page */
.notfound-hero { padding-bottom: 56px; }
.notfound-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 20px;
}

/* Sales page: hero */
.sales-hero {
  padding: 56px 0 40px;
  text-align: center;
}
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 0 0 8px;
}
.sales-hero h1 {
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  font-weight: 800;
  max-width: 780px;
  margin: 0 auto 16px;
  line-height: 1.25;
}
.sales-hero .hero-sub {
  max-width: 640px;
  margin: 0 auto 24px;
}
.btn-large {
  display: inline-block;
  width: auto;
  padding: 16px 32px;
  font-size: 1.1rem;
}
.hero-micro {
  margin-top: 12px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* Pain section */
.pain-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 40px 0;
}
.pain-section h2 {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 24px;
}
.pain-list {
  list-style: none;
  padding: 0;
  max-width: 680px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.pain-list li {
  position: relative;
  padding-left: 32px;
  font-weight: 500;
}
.pain-list li::before {
  content: "✕";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--color-danger);
  font-weight: 800;
}

/* Solution section */
.solution-section { padding: 48px 0; }
.solution-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
@media (min-width: 860px) {
  .solution-grid { grid-template-columns: 1.3fr 1fr; align-items: start; }
}
.check-list {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.check-list li {
  position: relative;
  padding-left: 30px;
}
.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--color-accent);
  font-weight: 800;
}
.solution-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
}
.solution-card h3 { margin-top: 0; }
.includes-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.includes-list li {
  position: relative;
  padding-left: 26px;
  font-size: 0.95rem;
}
.includes-list li::before {
  content: "＋";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--color-primary);
  font-weight: 800;
}

/* Pricing */
.pricing-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 48px 0;
}
.price-card {
  max-width: 420px;
  margin: 0 auto;
  text-align: center;
  border: 2px solid var(--color-primary);
  border-radius: var(--radius);
  padding: 32px 24px;
  background: #f5f9ff;
}
.price-tag-label {
  margin: 0 0 4px;
  font-weight: 600;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}
.price-tag {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--color-primary-dark);
  margin: 0 0 4px;
}
.price-tag span { font-size: 1.4rem; }
.price-sub {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin: 0 0 20px;
}
.guarantee-note {
  margin: 16px 0 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* FAQ */
.faq-section { padding: 48px 0; }
.faq-section h2 { text-align: center; margin-bottom: 24px; }
.faq-item {
  max-width: 720px;
  margin: 0 auto 12px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 14px 18px;
  background: var(--color-surface);
}
.faq-item summary {
  cursor: pointer;
  font-weight: 700;
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  float: right;
  font-weight: 800;
  color: var(--color-primary);
}
.faq-item[open] summary::after { content: "−"; }
.faq-item p {
  margin: 10px 0 0;
  color: var(--color-text-muted);
}

/* Final CTA */
.final-cta-section {
  background: var(--color-primary);
  color: #fff;
  text-align: center;
  padding: 48px 0;
}
.final-cta-section h2 { margin-top: 0; color: #fff; }
.final-cta-section p { color: rgba(255,255,255,0.85); max-width: 560px; margin: 0 auto 20px; }
.final-cta-section .btn-primary {
  background: #fff;
  color: var(--color-primary-dark);
}
.final-cta-section .btn-primary:hover { background: #f0f0f0; }

/* Blog list */
.blog-list-section { padding: 8px 0 56px; }
.blog-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
@media (min-width: 720px) {
  .blog-list { grid-template-columns: repeat(3, 1fr); }
}
.blog-card {
  display: block;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 22px;
  color: inherit;
  text-decoration: none;
}
.blog-card:hover {
  border-color: var(--color-primary);
  text-decoration: none;
}
.blog-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-primary);
  margin: 0 0 10px;
}
.blog-card h2 {
  font-size: 1.15rem;
  margin: 0 0 10px;
  line-height: 1.35;
}
.blog-card p {
  color: var(--color-text-muted);
  font-size: 0.92rem;
  margin: 0;
}

/* Article */
.article { padding: 40px 0 56px; }
.article-container { max-width: 720px; }
.article h1 {
  font-size: clamp(1.5rem, 3.5vw, 2.1rem);
  margin: 8px 0 16px;
  line-height: 1.3;
}
.article-byline {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin: 0 0 20px;
}
.article-lead {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  margin-bottom: 28px;
}
.article h2 {
  margin-top: 32px;
  font-size: 1.3rem;
}
.article p { margin: 12px 0; }
.article ul { margin: 12px 0; padding-left: 20px; }
.article li { margin-bottom: 8px; }

.compare-table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 0.92rem;
}
.compare-table th, .compare-table td {
  border: 1px solid var(--color-border);
  padding: 10px 12px;
  text-align: left;
}
.compare-table th {
  background: #eef4ff;
  font-weight: 700;
}

.article-cta {
  margin-top: 40px;
  padding: 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  text-align: center;
}
.article-cta p { margin: 0 0 4px; font-weight: 600; }