/* =========================================================
   SPIRAL UNIVERSE — Landing Page Styles
   Structure:
   1. Design tokens (light + dark)
   2. Base / reset
   3. Layout primitives
   4. Buttons / forms / typography
   5. Header & navigation
   6. Hero
   7. Sections (about, services, advantages, process, tech, portfolio, testimonials, faq, contact)
   8. Footer
   9. Responsive breakpoints
   ========================================================= */

/* ---------- 1. DESIGN TOKENS ---------- */
:root {
  /* Brand */
  --brand-500: #6366f1;
  --brand-600: #5355e8;
  --brand-700: #4f46e5;
  --accent-500: #8b5cf6;

  /* Light theme (default) */
  --bg:            #ffffff;
  --bg-soft:       #fafafa;
  --bg-muted:      #f4f4f6;
  --surface:       #ffffff;
  --surface-alt:   #fbfbfd;
  --border:        #e7e7ec;
  --border-strong: #d8d8e0;

  --text:          #0b0b12;
  --text-muted:    #545461;
  --text-dim:      #7a7a86;

  --shadow-sm: 0 1px 2px rgba(17, 17, 26, 0.04), 0 1px 1px rgba(17, 17, 26, 0.02);
  --shadow-md: 0 4px 12px rgba(17, 17, 26, 0.06), 0 2px 4px rgba(17, 17, 26, 0.04);
  --shadow-lg: 0 24px 48px -12px rgba(17, 17, 26, 0.10), 0 8px 16px -8px rgba(17, 17, 26, 0.06);

  --ring: 0 0 0 3px rgba(99, 102, 241, 0.28);

  /* Sizing */
  --radius-sm: 8px;
  --radius:    14px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --container: 1200px;
  --nav-h: 72px;

  /* Motion */
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --dur: 220ms;

  /* Font */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
               'Helvetica Neue', Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, 'JetBrains Mono', Menlo, Consolas, monospace;
}

/* Dark theme overrides */
[data-theme="dark"] {
  --bg:            #0a0a0f;
  --bg-soft:       #0d0d14;
  --bg-muted:      #12121b;
  --surface:       #111119;
  --surface-alt:   #15151f;
  --border:        #23232d;
  --border-strong: #2e2e3a;

  --text:          #f4f4f8;
  --text-muted:    #a8a8b8;
  --text-dim:      #76768a;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 24px 48px -12px rgba(0, 0, 0, 0.55);

  --ring: 0 0 0 3px rgba(139, 92, 246, 0.35);
}

/* ---------- 2. BASE / RESET ---------- */
*,
*::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: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
  overflow-x: hidden;
}

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

/* Focus ring */
:is(a, button, input, textarea, select, details summary):focus-visible {
  outline: none;
  box-shadow: var(--ring);
  border-radius: 6px;
}

/* Selection */
::selection { background: var(--brand-500); color: #fff; }

/* ---------- 3. LAYOUT PRIMITIVES ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 24px;
}

.section {
  padding: 96px 0;
  position: relative;
}
.section-alt {
  background: var(--bg-soft);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-head {
  max-width: 680px;
  margin-bottom: 56px;
}
.section-head.faq-head { text-align: center; margin-inline: auto; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand-500);
  margin-bottom: 16px;
}
[data-theme="dark"] .eyebrow { color: #a5a6fb; }

/* ---------- 4. TYPOGRAPHY ---------- */
.display, .h2, h3, h4 {
  color: var(--text);
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 20px;
  font-weight: 700;
}
.display {
  font-size: clamp(2.2rem, 4.4vw + 0.8rem, 4rem);
  letter-spacing: -0.035em;
  line-height: 1.05;
}
.h2 { font-size: clamp(1.75rem, 2.2vw + 1rem, 2.6rem); }
h3  { font-size: 1.2rem; margin-bottom: 10px; }
h4  { font-size: 0.95rem; margin-bottom: 14px; }

.lead {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 0 32px;
}
.section-sub {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin: 0;
}

p { margin: 0 0 14px; color: var(--text-muted); }

/* ---------- 4b. BUTTONS ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 10px;
  border: 1px solid transparent;
  transition: transform var(--dur) var(--ease),
              background var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease),
              color var(--dur) var(--ease);
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
}
.btn-sm { padding: 9px 16px; font-size: 0.88rem; }
.btn-block { width: 100%; }

.btn-primary {
  background: linear-gradient(135deg, var(--brand-500), var(--accent-500));
  color: #fff;
  box-shadow: 0 1px 0 rgba(255,255,255,0.15) inset, 0 8px 20px -10px rgba(99,102,241,0.7);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 1px 0 rgba(255,255,255,0.2) inset, 0 12px 28px -10px rgba(99,102,241,0.85); }
.btn-primary:active { transform: translateY(0); }

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border-strong);
}
.btn-ghost:hover {
  background: var(--bg-muted);
  border-color: var(--text-dim);
}

/* ---------- 5. HEADER ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.site-header.is-scrolled {
  border-bottom-color: var(--border);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: var(--nav-h);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.logo-text {
  font-size: 1rem;
  letter-spacing: 0.06em;
}
.logo-mark { display: grid; place-items: center; }

.primary-nav {
  display: flex;
  gap: 6px;
  margin-left: 24px;
  margin-right: auto;
}
.primary-nav a {
  position: relative;
  padding: 8px 12px;
  font-size: 0.92rem;
  color: var(--text-muted);
  border-radius: 8px;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.primary-nav a:hover { color: var(--text); background: var(--bg-muted); }
.primary-nav a.is-active { color: var(--text); }
.primary-nav a.is-active::after {
  content: "";
  position: absolute;
  left: 12px; right: 12px; bottom: 2px;
  height: 2px;
  background: linear-gradient(90deg, var(--brand-500), var(--accent-500));
  border-radius: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.lang-switcher {
  display: inline-flex;
  padding: 3px;
  background: var(--bg-muted);
  border: 1px solid var(--border);
  border-radius: 999px;
}
.lang-btn {
  appearance: none;
  background: transparent;
  border: 0;
  padding: 5px 10px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  border-radius: 999px;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.lang-btn:hover { color: var(--text); }
.lang-btn.is-active {
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}
[data-theme="dark"] .lang-btn.is-active { background: var(--border); color: #fff; }

.theme-toggle {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  background: var(--bg-muted);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-muted);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.theme-toggle:hover { color: var(--text); transform: rotate(-8deg); }
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

.burger {
  display: none;
  width: 40px; height: 40px;
  background: var(--bg-muted);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0;
  position: relative;
}
.burger span {
  position: absolute;
  left: 10px; right: 10px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease), top var(--dur) var(--ease);
}
.burger span:nth-child(1) { top: 13px; }
.burger span:nth-child(2) { top: 19px; }
.burger span:nth-child(3) { top: 25px; }
.burger.is-open span:nth-child(1) { top: 19px; transform: rotate(45deg); }
.burger.is-open span:nth-child(2) { opacity: 0; }
.burger.is-open span:nth-child(3) { top: 19px; transform: rotate(-45deg); }

/* Mobile drawer */
.mobile-menu {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 18px 24px 28px;
}
.mobile-menu nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.mobile-menu a {
  padding: 12px 14px;
  border-radius: 10px;
  color: var(--text);
  font-weight: 500;
}
.mobile-menu a:hover { background: var(--bg-muted); }
.mobile-menu .btn { margin-top: 12px; }

/* ---------- 6. HERO ---------- */
.hero {
  position: relative;
  padding: 80px 0 64px;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto auto;
  width: 720px; height: 720px;
  background: radial-gradient(closest-side, rgba(99,102,241,0.18), transparent 70%);
  filter: blur(20px);
  pointer-events: none;
  z-index: 0;
}
[data-theme="dark"] .hero::before {
  background: radial-gradient(closest-side, rgba(139,92,246,0.22), transparent 70%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.hero-copy { max-width: 620px; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px 6px 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 22px;
  box-shadow: var(--shadow-sm);
}
.badge-dot {
  width: 8px; height: 8px;
  background: var(--brand-500);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(99,102,241,0.2);
  animation: pulse 2s var(--ease) infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(99,102,241,0.2); }
  50%      { box-shadow: 0 0 0 8px rgba(99,102,241,0);   }
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 6px;
}
.hero-trust {
  margin-top: 28px;
  font-size: 0.9rem;
  color: var(--text-dim);
}

/* Hero visual */
.hero-visual {
  position: relative;
  height: 460px;
}
.hero-glow {
  position: absolute;
  inset: 0;
  background: radial-gradient(closest-side, rgba(139,92,246,0.20), transparent 70%);
  filter: blur(30px);
  z-index: 0;
}
.hero-card {
  position: absolute;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  z-index: 2;
}
.hero-card-1 {
  top: 40px;
  left: 20px;
  right: 60px;
  transform: rotate(-1deg);
}
.hc-head {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  background: var(--bg-muted);
  border-bottom: 1px solid var(--border);
}
.hc-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--border-strong);
}
.hc-dot:nth-child(1) { background: #ff6159; }
.hc-dot:nth-child(2) { background: #ffbe2e; }
.hc-dot:nth-child(3) { background: #28c940; }
.hc-title {
  margin-left: 8px;
  font-size: 0.75rem;
  color: var(--text-dim);
  font-family: var(--font-sans);
}
.hc-body { padding: 16px 18px; }
.code-line { line-height: 1.8; color: var(--text-muted); }
.code-line + .code-line { margin-top: 2px; }
.code-dim { color: var(--text-dim); }
.tok-k { color: #c084fc; }
.tok-v { color: #60a5fa; }
.tok-s { color: #34d399; }
.tok-t { color: #f472b6; }
.tok-str { color: #fbbf24; }
[data-theme="dark"] .tok-k { color: #c4b5fd; }

.hero-stat {
  position: absolute;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 18px;
  box-shadow: var(--shadow-md);
  z-index: 3;
}
.hero-stat-1 { bottom: 60px; left: 0; }
.hero-stat-2 { bottom: 10px; right: 20px; }
.stat-num {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--brand-500), var(--accent-500));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Hero strip */
.hero-strip {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 28px 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  position: relative;
  z-index: 1;
}
.strip-item { text-align: left; }
.strip-num {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}
.strip-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ---------- 7. SECTIONS ---------- */

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 64px;
  align-items: start;
}
.about-left .h2 { margin-bottom: 0; }
.about-list {
  list-style: none;
  padding: 0;
  margin: 22px 0 0;
  display: grid;
  gap: 12px;
}
.about-list li {
  position: relative;
  padding-left: 28px;
  color: var(--text);
  font-weight: 500;
}
.about-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 8px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-500), var(--accent-500));
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand-500) 15%, transparent);
}

/* Cards grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: transform var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}
.card:hover {
  transform: translateY(-3px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

/* Services */
.service-card { display: flex; flex-direction: column; }
.card-icon {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--brand-500), var(--accent-500));
  border-radius: 12px;
  margin-bottom: 20px;
  box-shadow: 0 10px 24px -10px rgba(99,102,241,0.6);
}
.card-tags {
  list-style: none;
  padding: 0;
  margin: 18px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.card-tags li {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 4px 10px;
  background: var(--bg-muted);
  color: var(--text-muted);
  border-radius: 999px;
}

/* Advantages */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--surface);
}
.adv-item {
  padding: 32px;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  position: relative;
  transition: background var(--dur) var(--ease);
}
.adv-item:hover { background: var(--bg-soft); }
.adv-item:nth-child(3n) { border-right: 0; }
.adv-item:nth-last-child(-n+3) { border-bottom: 0; }
.adv-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--brand-500);
  margin-bottom: 16px;
}
[data-theme="dark"] .adv-num { color: #a5a6fb; }

/* Process */
.process-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  counter-reset: step;
}
.process-step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.process-step:hover {
  transform: translateY(-3px);
  border-color: var(--brand-500);
}
.step-index {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px dashed var(--border);
}
.process-step h3 { font-size: 1.05rem; margin-bottom: 8px; }
.process-step p { font-size: 0.9rem; margin: 0; }

/* Tech */
.tech-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.tech-chip {
  padding: 12px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text);
  transition: all var(--dur) var(--ease);
}
.tech-chip:hover {
  border-color: var(--brand-500);
  color: var(--brand-500);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}
[data-theme="dark"] .tech-chip:hover { color: #c4b5fd; border-color: var(--accent-500); }

/* Portfolio */
.portfolio-grid { grid-template-columns: repeat(3, 1fr); }
.project-card { padding: 0; overflow: hidden; display: flex; flex-direction: column; }
.project-cover {
  position: relative;
  height: 180px;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
}
.project-cover-1 { background: linear-gradient(135deg, #6366f1, #8b5cf6); }
.project-cover-2 { background: linear-gradient(135deg, #0ea5e9, #6366f1); }
.project-cover-3 { background: linear-gradient(135deg, #f43f5e, #8b5cf6); }
.project-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(255,255,255,0.25), transparent 55%),
    radial-gradient(ellipse at 80% 80%, rgba(0,0,0,0.15), transparent 60%);
}
.project-tag {
  position: absolute;
  top: 16px; left: 16px;
  padding: 4px 10px;
  background: rgba(255,255,255,0.18);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.3);
  backdrop-filter: blur(8px);
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  z-index: 1;
}
.project-body { padding: 24px 26px 26px; flex: 1; display: flex; flex-direction: column; }
.project-cat {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 10px;
}
.project-body h3 { font-size: 1.15rem; }
.project-metrics {
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 28px;
}
.project-metrics div { display: flex; flex-direction: column; }
.project-metrics b {
  font-size: 1.15rem;
  color: var(--text);
  letter-spacing: -0.02em;
}
.project-metrics span {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* Testimonials */
.testimonial-grid { grid-template-columns: repeat(3, 1fr); }
.testimonial-card { display: flex; flex-direction: column; gap: 18px; }
.quote-mark { color: var(--brand-500); opacity: 0.8; }
[data-theme="dark"] .quote-mark { color: #a5a6fb; }
.testimonial-card p {
  color: var(--text);
  font-size: 1rem;
  line-height: 1.65;
  margin: 0;
  flex: 1;
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.avatar {
  width: 42px; height: 42px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--brand-500), var(--accent-500));
  color: #fff;
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  border-radius: 50%;
}
.author-name { font-weight: 600; color: var(--text); font-size: 0.92rem; }
.author-role { font-size: 0.82rem; color: var(--text-muted); }

/* FAQ */
.faq-wrap { max-width: 820px; }
.faq-list {
  display: grid;
  gap: 12px;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease);
}
.faq-item[open] { border-color: var(--border-strong); }
.faq-item summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  font-size: 1rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-icon {
  flex: none;
  width: 22px; height: 22px;
  position: relative;
  transition: transform var(--dur) var(--ease);
}
.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  top: 50%; left: 50%;
  background: var(--text-muted);
  border-radius: 2px;
}
.faq-icon::before { width: 12px; height: 2px; transform: translate(-50%, -50%); }
.faq-icon::after  { width: 2px; height: 12px; transform: translate(-50%, -50%); transition: transform var(--dur) var(--ease); }
.faq-item[open] .faq-icon::after { transform: translate(-50%, -50%) scaleY(0); }

.faq-answer { padding: 0 24px 22px; }
.faq-answer p { margin: 0; }

/* Contact */
.contact-section { padding-bottom: 120px; }
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  align-items: start;
}
.contact-info p { margin-bottom: 32px; max-width: 440px; }

.contact-meta {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 18px;
}
.contact-meta li {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
  align-items: baseline;
}
.contact-meta li:last-child { border-bottom: 0; padding-bottom: 0; }
.meta-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.contact-meta a, .contact-meta span { color: var(--text); font-weight: 500; }
.contact-meta a:hover { color: var(--brand-500); }

/* Form */
.contact-form {
  padding: 32px;
  display: grid;
  gap: 18px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.form-field {
  display: grid;
  gap: 7px;
}
.form-field span {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
}
.form-field input,
.form-field textarea {
  font: inherit;
  width: 100%;
  padding: 12px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  resize: vertical;
}
.form-field input::placeholder,
.form-field textarea::placeholder { color: var(--text-dim); }
.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--brand-500);
  box-shadow: var(--ring);
}

.form-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: 4px;
}
.form-note {
  margin: 0;
  font-size: 0.82rem;
  color: var(--text-dim);
  max-width: 280px;
}
.form-status {
  font-size: 0.9rem;
  color: var(--brand-500);
  min-height: 1.2em;
}
.form-status.is-success { color: #10b981; }
.form-status.is-error   { color: #ef4444; }

/* ---------- 8. FOOTER ---------- */
.site-footer {
  background: var(--bg-soft);
  border-top: 1px solid var(--border);
  padding: 64px 0 24px;
  margin-top: 0;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border);
}
.footer-brand p {
  margin-top: 16px;
  max-width: 300px;
  font-size: 0.92rem;
}
.footer-col { display: flex; flex-direction: column; gap: 10px; }
.footer-col h4 {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 6px;
}
.footer-col a, .footer-col span {
  font-size: 0.92rem;
  color: var(--text-muted);
  transition: color var(--dur) var(--ease);
}
.footer-col a:hover { color: var(--text); }
.footer-lang {
  display: inline-flex;
  margin-top: 16px;
  padding: 3px;
  background: var(--bg-muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  align-self: flex-start;
}

.footer-bottom {
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.86rem;
  color: var(--text-dim);
}
.footer-bottom p { margin: 0; color: var(--text-dim); }
.footer-legal { display: flex; gap: 20px; }
.footer-legal a { color: var(--text-dim); }
.footer-legal a:hover { color: var(--text); }

/* ---------- 9. RESPONSIVE ---------- */
@media (max-width: 1024px) {
  .section { padding: 80px 0; }
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { height: 380px; }
  .about-grid { grid-template-columns: 1fr; gap: 28px; }
  .cards-grid, .portfolio-grid, .testimonial-grid { grid-template-columns: repeat(2, 1fr); }
  .advantages-grid { grid-template-columns: repeat(2, 1fr); }
  .adv-item:nth-child(3n) { border-right: 1px solid var(--border); }
  .adv-item:nth-child(2n) { border-right: 0; }
  .adv-item:nth-last-child(-n+3) { border-bottom: 1px solid var(--border); }
  .adv-item:nth-last-child(-n+2) { border-bottom: 0; }
  .process-list { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-inner { grid-template-columns: repeat(2, 1fr); gap: 36px; }
}

@media (max-width: 768px) {
  .primary-nav,
  .header-cta { display: none; }
  .burger { display: block; }
  .lang-switcher { display: none; }

  .hero { padding: 56px 0 48px; }
  .hero-strip {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
    padding: 22px;
  }
  .hero-visual { height: 320px; }
  .hero-card-1 { left: 0; right: 20px; top: 20px; }
  .hero-stat-1 { bottom: 40px; }
  .hero-stat-2 { bottom: 0; }

  .section { padding: 64px 0; }
  .section-head { margin-bottom: 40px; }

  .cards-grid, .portfolio-grid, .testimonial-grid,
  .advantages-grid, .process-list {
    grid-template-columns: 1fr;
  }
  .advantages-grid { border-radius: var(--radius); }
  .adv-item { border-right: 0 !important; border-bottom: 1px solid var(--border) !important; }
  .adv-item:last-child { border-bottom: 0 !important; }

  .form-row { grid-template-columns: 1fr; }
  .form-footer { flex-direction: column; align-items: stretch; }
  .form-footer .btn { width: 100%; }

  .footer-inner { grid-template-columns: 1fr; gap: 32px; padding-bottom: 36px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .container { padding-inline: 18px; }
  .logo-text { font-size: 0.88rem; }
  .display { font-size: 2.1rem; }
  .hero-actions .btn { width: 100%; }
  .contact-meta li { grid-template-columns: 1fr; gap: 4px; }
  .contact-form { padding: 22px; }
  .testimonial-card p { font-size: 0.95rem; }
}

/* ---------- Motion preferences ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* Prevent flash on load */
body { visibility: visible; }

/* No-scroll lock for mobile menu */
body.no-scroll { overflow: hidden; }