/* ====================================================
   RTE Soft — corporate site styles
   Design system: enterprise B2B, deep navy + accent blue
   ==================================================== */

:root {
  --c-bg: #ffffff;
  --c-bg-alt: #f6f8fb;
  --c-bg-dark: #0f2c46;
  --c-bg-darker: #0a1f33;
  --c-text: #1a2738;
  --c-text-muted: #5a6b80;
  --c-text-inverse: #ffffff;
  --c-text-inverse-muted: #b9c6d6;
  --c-primary: #1f4e79;
  --c-primary-hover: #173d61;
  --c-accent: #2e75b6;
  --c-accent-light: #d9e8f5;
  --c-border: #e1e8f0;
  --c-border-dark: #1c3a57;
  --c-success: #1f8a4a;
  --c-warning: #b58400;

  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 12px;

  --shadow-sm: 0 1px 2px rgba(15, 44, 70, 0.06), 0 1px 3px rgba(15, 44, 70, 0.05);
  --shadow-md: 0 4px 8px rgba(15, 44, 70, 0.08), 0 2px 4px rgba(15, 44, 70, 0.06);
  --shadow-lg: 0 12px 24px rgba(15, 44, 70, 0.10), 0 4px 8px rgba(15, 44, 70, 0.06);

  --container: 1180px;
  --section-py: 96px;
  --section-py-sm: 64px;

  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", monospace;
}

/* Reset & base */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; display: block; }
a { color: var(--c-accent); text-decoration: none; transition: color 0.15s ease; }
a:hover { color: var(--c-primary); }
h1, h2, h3, h4 { color: var(--c-text); line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 0.6em 0; font-weight: 700; }
h1 { font-size: clamp(2.2rem, 4.5vw, 3.4rem); letter-spacing: -0.025em; }
h2 { font-size: clamp(1.8rem, 3.2vw, 2.4rem); }
h3 { font-size: 1.35rem; }
p { margin: 0 0 1em 0; }
.muted { color: var(--c-text-muted); }
.lead { font-size: 1.2rem; color: var(--c-text-muted); line-height: 1.55; }
ul.clean { list-style: none; padding: 0; margin: 0; }

/* Layout */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
section { padding: var(--section-py) 0; }
section.compact { padding: var(--section-py-sm) 0; }
.section-head { max-width: 760px; margin-bottom: 56px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 12px;
}

/* Navigation */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--c-border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--c-text);
  letter-spacing: -0.01em;
}
.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 7px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: -0.02em;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-links a {
  color: var(--c-text);
  font-weight: 500;
  font-size: 0.95rem;
}
.nav-links a:hover { color: var(--c-accent); }
.nav-right { display: flex; align-items: center; gap: 18px; }
.lang-switcher {
  display: inline-flex;
  gap: 2px;
  padding: 3px;
  background: var(--c-bg-alt);
  border-radius: 6px;
}
.lang-switcher a {
  font-size: 0.85rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 4px;
  color: var(--c-text-muted);
}
.lang-switcher a.active {
  background: var(--c-text-inverse);
  color: var(--c-text);
  box-shadow: var(--shadow-sm);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  font-size: 0.96rem;
  font-weight: 600;
  border-radius: var(--r-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s ease;
  font-family: inherit;
}
.btn-primary {
  background: var(--c-primary);
  color: #fff;
}
.btn-primary:hover { background: var(--c-primary-hover); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-secondary {
  background: transparent;
  color: var(--c-primary);
  border-color: var(--c-border);
}
.btn-secondary:hover { background: var(--c-bg-alt); color: var(--c-primary); border-color: var(--c-accent); }
.btn-ghost {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.30);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.08); color: #fff; }
.btn-lg { padding: 15px 28px; font-size: 1.02rem; }

/* Hero */
.hero {
  padding: 110px 0 100px;
  background: linear-gradient(180deg, #ffffff 0%, var(--c-bg-alt) 100%);
  border-bottom: 1px solid var(--c-border);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  top: -100px;
  right: -100px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(46, 117, 182, 0.10) 0%, transparent 70%);
  pointer-events: none;
}
.hero-inner { display: grid; grid-template-columns: 1.2fr 1fr; gap: 64px; align-items: center; position: relative; }
.hero-text h1 { margin-bottom: 24px; }
.hero-text .lead { font-size: 1.25rem; margin-bottom: 32px; max-width: 560px; }
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 32px; }
.hero-mini-stats { display: flex; gap: 32px; flex-wrap: wrap; padding-top: 24px; border-top: 1px solid var(--c-border); }
.hero-mini-stats div strong { display: block; font-size: 1.5rem; color: var(--c-primary); font-weight: 700; letter-spacing: -0.02em; }
.hero-mini-stats div span { font-size: 0.88rem; color: var(--c-text-muted); }
.hero-visual {
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-accent) 100%);
  border-radius: 16px;
  padding: 36px;
  color: #fff;
  box-shadow: var(--shadow-lg);
  position: relative;
}
.hero-visual h3 { color: #fff; font-size: 1.1rem; margin-bottom: 20px; opacity: 0.92; }
.hero-visual .vis-line {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  font-size: 0.93rem;
}
.hero-visual .vis-line:last-child { border-bottom: none; }
.hero-visual .vis-label { opacity: 0.85; }
.hero-visual .vis-value { font-weight: 700; font-family: var(--font-mono); font-size: 0.92rem; }
.hero-visual .vis-tag { display: inline-block; padding: 3px 10px; background: rgba(255, 255, 255, 0.15); border-radius: 99px; font-size: 0.78rem; font-weight: 600; margin-top: 4px; }

/* Trust band */
.trust-band {
  background: var(--c-bg-dark);
  color: var(--c-text-inverse);
  padding: 56px 0;
}
.trust-band h4 {
  color: var(--c-text-inverse-muted);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  text-align: center;
  margin-bottom: 36px;
}
.trust-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}
.trust-stats div strong {
  display: block;
  font-size: 2.5rem;
  color: #fff;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.1;
}
.trust-stats div span {
  font-size: 0.9rem;
  color: var(--c-text-inverse-muted);
  display: block;
  margin-top: 6px;
}

/* Sections — generic */
.alt-bg { background: var(--c-bg-alt); }
.dark-bg { background: var(--c-bg-dark); color: var(--c-text-inverse); }
.dark-bg h2, .dark-bg h3, .dark-bg h4 { color: #fff; }
.dark-bg .lead, .dark-bg p { color: var(--c-text-inverse-muted); }
.dark-bg .eyebrow { color: var(--c-accent); }

/* Cards grid */
.grid {
  display: grid;
  gap: 24px;
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: 28px;
  transition: all 0.2s ease;
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.card h3 { margin-top: 8px; margin-bottom: 12px; }
.card-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--c-accent-light);
  color: var(--c-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 16px;
}

/* Offer cards (two main offers) */
.offer {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: 40px 36px;
  display: flex;
  flex-direction: column;
  height: 100%;
}
.offer.featured { border: 2px solid var(--c-accent); position: relative; }
.offer .offer-tag { display: inline-block; padding: 4px 12px; background: var(--c-accent-light); color: var(--c-primary); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; border-radius: 99px; margin-bottom: 16px; }
.offer h3 { font-size: 1.55rem; margin-bottom: 12px; }
.offer .offer-sub { color: var(--c-text-muted); margin-bottom: 24px; }
.offer ul { padding-left: 0; list-style: none; margin-bottom: 28px; flex-grow: 1; }
.offer ul li { padding: 9px 0 9px 28px; position: relative; color: var(--c-text); font-size: 0.97rem; line-height: 1.5; }
.offer ul li::before {
  content: "→";
  position: absolute;
  left: 0;
  top: 9px;
  color: var(--c-accent);
  font-weight: 700;
}
.offer .offer-meta { display: flex; gap: 18px; flex-wrap: wrap; padding-top: 18px; border-top: 1px solid var(--c-border); font-size: 0.88rem; color: var(--c-text-muted); margin-bottom: 22px; }
.offer .offer-meta strong { color: var(--c-text); display: block; }

/* How it works steps */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}
.step {
  position: relative;
  padding: 28px 20px;
}
.step::before {
  counter-increment: step;
  content: counter(step);
  display: inline-block;
  width: 36px;
  height: 36px;
  line-height: 36px;
  text-align: center;
  background: var(--c-primary);
  color: #fff;
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 16px;
}
.step h3 { font-size: 1.1rem; margin-bottom: 8px; }
.step p { font-size: 0.94rem; color: var(--c-text-muted); margin: 0; }

/* Case study block */
.case-block {
  background: linear-gradient(135deg, var(--c-bg-dark) 0%, var(--c-bg-darker) 100%);
  border-radius: 16px;
  padding: 56px;
  color: #fff;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  align-items: center;
}
.case-block h3 { color: #fff; font-size: 1.75rem; margin-bottom: 16px; }
.case-block p { color: var(--c-text-inverse-muted); }
.case-block .case-meta { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; margin-top: 28px; }
.case-block .case-meta div strong { display: block; font-size: 1.7rem; color: #fff; font-weight: 700; letter-spacing: -0.02em; }
.case-block .case-meta div span { font-size: 0.84rem; color: var(--c-text-inverse-muted); margin-top: 4px; display: block; }
.case-block .case-quote {
  background: rgba(255, 255, 255, 0.06);
  border-left: 3px solid var(--c-accent);
  padding: 22px 26px;
  border-radius: 6px;
  font-style: italic;
  color: var(--c-text-inverse-muted);
  font-size: 0.97rem;
  line-height: 1.55;
}

/* Differentiators */
.diff-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.diff-item {
  padding: 26px;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
}
.diff-item h3 { font-size: 1.15rem; margin-bottom: 10px; }
.diff-item p { color: var(--c-text-muted); margin: 0; font-size: 0.96rem; }
.diff-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--c-accent);
  font-weight: 700;
  margin-bottom: 10px;
}

/* FAQ */
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item {
  border-bottom: 1px solid var(--c-border);
  padding: 20px 0;
}
.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--c-text);
  font-size: 1.05rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 4px 0;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-size: 1.5rem;
  color: var(--c-accent);
  font-weight: 400;
  transition: transform 0.2s ease;
  flex-shrink: 0;
}
.faq-item[open] summary::after { content: "−"; }
.faq-item p { color: var(--c-text-muted); margin: 12px 0 4px 0; line-height: 1.6; }

/* Contact form */
.contact-block {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 56px;
  align-items: start;
}
.contact-info h2 { margin-bottom: 18px; }
.contact-info p { color: var(--c-text-muted); margin-bottom: 28px; }
.contact-list { list-style: none; padding: 0; margin: 0; }
.contact-list li { padding: 10px 0; color: var(--c-text); font-size: 0.97rem; }
.contact-list strong { display: block; color: var(--c-text-muted); font-size: 0.82rem; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; margin-bottom: 4px; }

.form {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: 36px;
  box-shadow: var(--shadow-sm);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-field { margin-bottom: 18px; }
.form-field label {
  display: block;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 6px;
}
.form-field label .req { color: var(--c-warning); }
.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  font-family: inherit;
  font-size: 0.96rem;
  color: var(--c-text);
  background: #fff;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px rgba(46, 117, 182, 0.15);
}
.form-field textarea { resize: vertical; min-height: 110px; }
.form-consent { display: flex; gap: 10px; align-items: flex-start; margin-bottom: 22px; }
.form-consent input[type="checkbox"] { margin-top: 4px; flex-shrink: 0; }
.form-consent label { font-size: 0.86rem; color: var(--c-text-muted); line-height: 1.5; font-weight: 400; }
.form-consent label a { color: var(--c-accent); }
.honeypot { position: absolute; left: -9999px; }
.form-status { padding: 10px 14px; border-radius: var(--r-md); margin-top: 14px; font-size: 0.92rem; display: none; }
.form-status.success { background: #e6f5ec; color: var(--c-success); display: block; }
.form-status.error { background: #fdeaea; color: #b73a3a; display: block; }

/* Footer */
.footer {
  background: var(--c-bg-darker);
  color: var(--c-text-inverse-muted);
  padding: 56px 0 32px;
  font-size: 0.92rem;
}
.footer-top { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer h4 {
  color: #fff;
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.footer a { color: var(--c-text-inverse-muted); }
.footer a:hover { color: #fff; }
.footer ul.clean li { padding: 4px 0; }
.footer-bottom {
  border-top: 1px solid var(--c-border-dark);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
}

/* Mobile responsive */
@media (max-width: 960px) {
  :root {
    --section-py: 64px;
    --section-py-sm: 48px;
  }
  .hero { padding: 64px 0; }
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { padding: 28px; }
  .nav-inner { height: 64px; }
  .nav-links { display: none; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .trust-stats { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .trust-stats div strong { font-size: 2rem; }
  .steps { grid-template-columns: 1fr 1fr; }
  .case-block { grid-template-columns: 1fr; padding: 36px 28px; gap: 28px; }
  .case-block .case-meta { grid-template-columns: 1fr 1fr; }
  .diff-grid { grid-template-columns: 1fr; }
  .contact-block { grid-template-columns: 1fr; gap: 36px; }
  .form-row { grid-template-columns: 1fr; }
  .form { padding: 24px; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 30px; }
}

@media (max-width: 520px) {
  body { font-size: 16px; }
  .lead { font-size: 1.1rem; }
  .hero-mini-stats { gap: 18px; }
  .hero-mini-stats div strong { font-size: 1.25rem; }
  .steps { grid-template-columns: 1fr; }
  .trust-stats { grid-template-columns: 1fr 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .hero-ctas { flex-direction: column; align-items: stretch; }
  .hero-ctas .btn { justify-content: center; }
}