/* ==========================================================================
   Хелпер — design tokens
   Style: Trust & Authority / Minimal & Direct (dark), adapted from
   ui-ux-pro-max design system search:
     - style: "Minimal & Direct" (consulting services) + dark mode discipline
     - color: Luxury/Premium Brand palette (near-black + gold accent), remapped to true dark bg
     - typography: "Classic Elegant" pairing — Playfair Display (headings) + Inter (body)
   ========================================================================== */

:root {
  --color-bg: #0b0c0f;
  --color-bg-elevated: #131519;
  --color-surface: #16181d;
  --color-border: #24272e;
  --color-border-soft: #1c1e24;

  --color-text: #f3f1ec;
  --color-text-muted: #9ca0aa;
  --color-text-faint: #7d818c;

  --color-accent: #c9a24b;
  --color-accent-hover: #dab868;
  --color-on-accent: #0b0c0f;

  --font-serif: "Playfair Display", Georgia, "Times New Roman", serif;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --space-7: 96px;
  --space-8: 128px;

  --radius-sm: 6px;
  --radius-md: 10px;
  --content-max: 1180px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

h1, h2, h3 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 var(--space-2);
  letter-spacing: -0.01em;
}

p { margin: 0 0 var(--space-2); }

.container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-accent);
  color: var(--color-on-accent);
  padding: 10px 16px;
  z-index: 200;
  border-radius: var(--radius-sm);
}
.skip-link:focus { left: var(--space-2); top: var(--space-2); }

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 200ms var(--ease), border-color 200ms var(--ease), transform 200ms var(--ease), color 200ms var(--ease);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--color-accent);
  color: var(--color-on-accent);
}
.btn-primary:hover { background: var(--color-accent-hover); }

.btn-ghost {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}
.btn-ghost:hover { border-color: var(--color-accent); color: var(--color-accent); }

.btn-lg { padding: 16px 34px; font-size: 16px; }

.btn-header { display: inline-flex; }

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 12, 15, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border-soft);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding-top: var(--space-2);
  padding-bottom: var(--space-2);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text);
  margin-right: auto;
}
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--color-accent);
  border-radius: 50%;
  color: var(--color-accent);
  font-size: 15px;
}

.nav {
  display: flex;
  gap: var(--space-4);
}
.nav a {
  font-size: 15px;
  color: var(--color-text-muted);
  transition: color 200ms var(--ease);
}
.nav a:hover { color: var(--color-text); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  margin: 0 auto;
  background: var(--color-text);
}

.mobile-nav {
  display: none;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3) var(--space-4);
  border-top: 1px solid var(--color-border-soft);
}
.mobile-nav a { font-size: 16px; color: var(--color-text-muted); padding: 6px 0; }
.mobile-nav a.btn {
  color: var(--color-on-accent);
  padding: 13px 26px;
  margin-top: var(--space-1);
  align-self: flex-start;
}

.site-header.is-open .mobile-nav { display: flex; }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  padding: var(--space-8) 0 var(--space-7);
  border-bottom: 1px solid var(--color-border-soft);
}
.hero-inner { max-width: 860px; }

.eyebrow, .section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 var(--space-2);
}

.hero h1 {
  font-size: clamp(32px, 4.6vw, 52px);
  color: var(--color-text);
  max-width: 15ch;
}

.hero-lead {
  font-size: 18px;
  color: var(--color-text-muted);
  max-width: 56ch;
  margin-bottom: var(--space-4);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* ==========================================================================
   Section titles (shared)
   ========================================================================== */
.section-title {
  font-size: clamp(26px, 3.2vw, 36px);
  color: var(--color-text);
  max-width: 22ch;
  margin-bottom: var(--space-5);
}

/* ==========================================================================
   Services
   ========================================================================== */
.services { padding: var(--space-7) 0; border-bottom: 1px solid var(--color-border-soft); }

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  transition: transform 220ms var(--ease), border-color 220ms var(--ease);
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
}

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-bg-elevated);
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}
.card-icon svg { width: 22px; height: 22px; }

.card h3 {
  font-size: 19px;
  color: var(--color-text);
  margin-bottom: 10px;
}
.card p {
  font-size: 15px;
  color: var(--color-text-muted);
  margin-bottom: 0;
}

/* ==========================================================================
   Process
   ========================================================================== */
.process { padding: var(--space-7) 0; border-bottom: 1px solid var(--color-border-soft); }

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
}

.step {
  position: relative;
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
}
.step-num {
  display: block;
  font-family: var(--font-serif);
  font-size: 15px;
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}
.step h3 { font-size: 18px; margin-bottom: 8px; }
.step p { font-size: 15px; color: var(--color-text-muted); margin-bottom: 0; }

/* ==========================================================================
   Why
   ========================================================================== */
.why { padding: var(--space-7) 0; border-bottom: 1px solid var(--color-border-soft); background: var(--color-bg-elevated); }

.why-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  align-items: start;
}

.why-lead { font-size: 16px; color: var(--color-text-muted); }

.why-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.why-facts li {
  position: relative;
  padding-left: 28px;
  font-size: 15.5px;
  color: var(--color-text);
  line-height: 1.6;
}
.why-mark {
  position: absolute;
  left: 0;
  top: 7px;
  width: 10px;
  height: 10px;
  border: 1.5px solid var(--color-accent);
  border-radius: 50%;
}

/* ==========================================================================
   Contacts
   ========================================================================== */
.contacts { padding: var(--space-8) 0; }
.contacts-inner { max-width: 640px; text-align: left; }
.contacts-lead {
  font-size: 17px;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--color-border-soft);
  padding: var(--space-4) 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-size: 14px;
  color: var(--color-text-faint);
}
.footer-inner a { color: var(--color-text-muted); transition: color 200ms var(--ease); }
.footer-inner a:hover { color: var(--color-accent); }

/* ==========================================================================
   Scroll reveal
   ========================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 560ms var(--ease), transform 560ms var(--ease);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1024px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .why-inner { grid-template-columns: 1fr; gap: var(--space-4); }
}

@media (max-width: 768px) {
  :root {
    --space-7: 64px;
    --space-8: 80px;
  }
  .nav, .btn-header { display: none; }
  .nav-toggle { display: flex; }
  .lg-only { display: none; }
  .cards { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; gap: var(--space-4); }
}

@media (max-width: 480px) {
  .container { padding: 0 var(--space-2); }
  .btn { width: 100%; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
}