:root {
  --blue-top: #70b3fa;
  --blue-bottom: #0a5ee6;
  --blue-deep: #0847b0;
  --ink: #0e1b33;
  --ink-soft: #46536b;
  --surface: #ffffff;
  --page: #f4f7fc;
  --border: rgba(14, 27, 51, 0.1);
  --radius-plate: 22.37%;
  --shadow-card: 0 18px 44px rgba(10, 71, 176, 0.14);
  --font: "SF Pro Rounded", "SF Pro Display", -apple-system,
    BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--page);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--blue-bottom);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  display: block;
}

.wrap {
  width: min(1080px, 100% - 3rem);
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: saturate(1.4) blur(14px);
  background: rgba(244, 247, 252, 0.82);
  border-bottom: 1px solid var(--border);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 0.85rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--ink);
}

.brand img {
  width: 34px;
  height: 34px;
  border-radius: 9px;
}

.nav {
  display: flex;
  gap: 1.6rem;
  font-weight: 600;
  font-size: 0.95rem;
}

.nav a {
  color: var(--ink-soft);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.4rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 1rem;
  background: linear-gradient(180deg, var(--blue-top), var(--blue-bottom));
  color: #fff;
  box-shadow: 0 10px 24px rgba(10, 94, 230, 0.32);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 16px 32px rgba(10, 94, 230, 0.4);
}

.btn.ghost {
  background: var(--surface);
  color: var(--blue-bottom);
  box-shadow: inset 0 0 0 1px var(--border);
}

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  padding-block: 5.5rem 6rem;
  text-align: center;
  color: #fff;
  background: linear-gradient(180deg, var(--blue-top) 0%, var(--blue-bottom) 70%, var(--blue-deep) 100%);
}

.hero::before,
.hero::after {
  content: "";
  position: absolute;
  border: 6px solid rgba(255, 255, 255, 0.22);
  border-radius: 34px;
  width: 220px;
  height: 220px;
}

.hero::before {
  top: -70px;
  left: -60px;
  border-right: none;
  border-bottom: none;
}

.hero::after {
  bottom: -70px;
  right: -60px;
  border-left: none;
  border-top: none;
}

.hero .plate {
  width: 132px;
  height: 132px;
  margin: 0 auto 1.8rem;
  border-radius: var(--radius-plate);
  box-shadow: 0 24px 60px rgba(4, 34, 90, 0.45);
}

.hero h1 {
  font-size: clamp(2.4rem, 6vw, 3.8rem);
  line-height: 1.08;
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
}

.hero p.lead {
  font-size: clamp(1.05rem, 2.4vw, 1.3rem);
  max-width: 44ch;
  margin: 0 auto 2.2rem;
  color: rgba(255, 255, 255, 0.92);
}

.hero .actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.hero .actions .btn {
  background: #fff;
  color: var(--blue-bottom);
  box-shadow: 0 14px 30px rgba(4, 34, 90, 0.35);
}

.hero .actions .btn.outline {
  background: transparent;
  color: #fff;
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.6);
}

.hero small {
  display: block;
  margin-top: 1.4rem;
  color: rgba(255, 255, 255, 0.8);
}

/* Sections */
section.block {
  padding-block: 5rem;
}

.section-head {
  text-align: center;
  max-width: 52ch;
  margin: 0 auto 3rem;
}

.section-head h2 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  margin: 0 0 0.6rem;
  letter-spacing: -0.02em;
}

.section-head p {
  color: var(--ink-soft);
  margin: 0;
  font-size: 1.1rem;
}

/* Feature grid */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.4rem;
}

.card {
  background: var(--surface);
  border-radius: 22px;
  padding: 1.8rem;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
}

.card .icon {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: 15px;
  margin-bottom: 1rem;
  background: linear-gradient(180deg, var(--blue-top), var(--blue-bottom));
  color: #fff;
}

.card .icon svg {
  width: 26px;
  height: 26px;
}

.card h3 {
  margin: 0 0 0.4rem;
  font-size: 1.2rem;
}

.card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.98rem;
}

/* Principles strip */
.principles {
  background: linear-gradient(180deg, var(--blue-bottom), var(--blue-deep));
  color: #fff;
}

.principles .grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
  text-align: center;
}

.principles .grid h3 {
  font-size: 1.15rem;
  margin: 0 0 0.4rem;
}

.principles .grid p {
  margin: 0;
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.98rem;
}

/* Install */
.install-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.4rem;
  counter-reset: step;
}

.install-steps li {
  list-style: none;
  background: var(--surface);
  border-radius: 20px;
  padding: 1.6rem;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
  position: relative;
}

.install-steps li::before {
  counter-increment: step;
  content: counter(step);
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 11px;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(180deg, var(--blue-top), var(--blue-bottom));
  margin-bottom: 0.9rem;
}

.install-steps h3 {
  margin: 0 0 0.3rem;
  font-size: 1.1rem;
}

.install-steps p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

code.inline {
  background: rgba(10, 94, 230, 0.1);
  padding: 0.1rem 0.4rem;
  border-radius: 6px;
  font-size: 0.9em;
}

/* Pricing */
.pricing {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.4rem;
  align-items: start;
}

.tier {
  background: var(--surface);
  border-radius: 22px;
  padding: 2rem 1.8rem;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.tier.featured {
  border: 2px solid var(--blue-bottom);
  position: relative;
}

.tier .ribbon {
  position: absolute;
  top: -0.9rem;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(180deg, var(--blue-top), var(--blue-bottom));
  color: #fff;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
}

.tier h3 {
  margin: 0;
  font-size: 1.3rem;
}

.tier .price {
  margin: 0.2rem 0 0;
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.tier .price .amount {
  font-size: 2.6rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.tier .price .per {
  color: var(--ink-soft);
  font-size: 0.95rem;
  font-weight: 600;
}

.tier .tier-note {
  margin: 0 0 0.4rem;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.tier ul {
  list-style: none;
  margin: 0 0 1.2rem;
  padding: 0;
  display: grid;
  gap: 0.55rem;
  flex: 1;
}

.tier ul li {
  position: relative;
  padding-left: 1.5rem;
  font-size: 0.95rem;
  color: var(--ink);
}

.tier ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 8px;
  height: 8px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--blue-top), var(--blue-bottom));
}

.tier .btn {
  justify-content: center;
}

.pricing-foot {
  text-align: center;
  margin-top: 2rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

/* Download */
.download-cta {
  text-align: center;
  margin: 0 0 3rem;
}

.download-cta .btn {
  font-size: 1.15rem;
  padding: 1rem 2rem;
}

.download-meta {
  display: block;
  margin-top: 0.8rem;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

/* Guide page */
.guide-main {
  padding-block: 3.5rem 5rem;
}

.guide-main .wrap {
  width: min(760px, 100% - 3rem);
}

.guide-main h1 {
  font-size: clamp(2rem, 5vw, 2.8rem);
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
}

.guide-main .intro {
  color: var(--ink-soft);
  font-size: 1.1rem;
  margin: 0 0 2.5rem;
}

.guide-main h2 {
  font-size: 1.5rem;
  margin: 2.8rem 0 0.8rem;
  letter-spacing: -0.01em;
}

.guide-main h3 {
  font-size: 1.1rem;
  margin: 1.6rem 0 0.4rem;
}

.guide-main ol,
.guide-main ul {
  padding-left: 1.3rem;
  margin: 0 0 1rem;
}

.guide-main li {
  margin-bottom: 0.5rem;
}

.callout {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 4px solid var(--blue-bottom);
  border-radius: 12px;
  padding: 1rem 1.2rem;
  margin: 1.2rem 0;
  font-size: 0.95rem;
  color: var(--ink-soft);
}

/* Contact form */
.contact-form {
  display: grid;
  gap: 0.4rem;
  max-width: 520px;
}

.contact-form label {
  font-weight: 700;
  font-size: 0.95rem;
  margin-top: 0.9rem;
}

.contact-form input,
.contact-form textarea {
  font: inherit;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.7rem 0.9rem;
  width: 100%;
  resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--blue-bottom);
  box-shadow: 0 0 0 3px rgba(10, 94, 230, 0.15);
}

.contact-form .cf-turnstile {
  margin: 1rem 0 0.4rem;
}

.contact-form .btn {
  justify-content: center;
  margin-top: 0.6rem;
}

.contact-form .btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.form-status {
  margin: 0.6rem 0 0;
  font-size: 0.95rem;
  font-weight: 600;
}

.form-status.error {
  color: #c0263a;
}

.form-status.success {
  color: #157a3e;
}

.faq dt {
  font-weight: 700;
  margin-top: 1.2rem;
}

.faq dd {
  margin: 0.3rem 0 0;
  color: var(--ink-soft);
}

/* Footer */
.site-footer {
  padding-block: 3rem;
  text-align: center;
  color: var(--ink-soft);
  border-top: 1px solid var(--border);
}

.site-footer .brand {
  justify-content: center;
  margin-bottom: 0.8rem;
  color: var(--ink);
}

.footer-links {
  font-weight: 600;
  font-size: 0.9rem;
}

.footer-links a {
  color: var(--ink-soft);
}

@media (max-width: 640px) {
  .nav {
    display: none;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #eef3ff;
    --ink-soft: #a7b3cc;
    --surface: #141b2c;
    --page: #0b111e;
    --border: rgba(255, 255, 255, 0.1);
    --shadow-card: 0 18px 44px rgba(0, 0, 0, 0.5);
  }

  .site-header {
    background: rgba(11, 17, 30, 0.82);
  }

  .btn.ghost {
    background: var(--surface);
  }
}