/* ==========================================================================
   NEUREX — Design Tokens & Styles
   Font: Manrope (excellent Cyrillic + Latin consistency)
   Colors: dark navy + bright blue accent on light background
   ========================================================================== */

:root {
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);

  --space-1:  0.25rem; --space-2:  0.5rem; --space-3:  0.75rem;
  --space-4:  1rem;    --space-5:  1.25rem; --space-6: 1.5rem;
  --space-8:  2rem;    --space-10: 2.5rem; --space-12: 3rem;
  --space-16: 4rem;    --space-20: 5rem;   --space-24: 6rem;
  --space-32: 8rem;

  --font-body: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --color-bg:           #F5F6FA;
  --color-surface:      #FFFFFF;
  --color-surface-2:    #F0F1F7;
  --color-border:       #DDDFE8;
  --color-divider:      #E8EAF0;

  --color-text:         #1B2541;
  --color-text-muted:   #5E6687;
  --color-text-faint:   #9BA2BD;

  --color-primary:      #3B82F6;
  --color-primary-hover:#2563EB;
  --color-primary-dark: #1D4ED8;

  --color-navy:         #1B2541;
  --color-navy-light:   #2A3A5C;

  --radius-sm: 6px; --radius-md: 10px; --radius-lg: 14px;
  --radius-xl: 20px; --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(27, 37, 65, 0.06);
  --shadow-md: 0 4px 16px rgba(27, 37, 65, 0.08);
  --shadow-lg: 0 12px 40px rgba(27, 37, 65, 0.12);

  --content-wide: 1200px;
}

/* ==========================================================================
   LAYOUT
   ========================================================================== */

.container {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding-inline: var(--space-6);
}

/* ==========================================================================
   HEADER
   ========================================================================== */

.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(245, 246, 250, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.header.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
  display: flex; align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

.logo { color: var(--color-navy); text-decoration: none; flex-shrink: 0; display: flex; align-items: center; }
.logo-svg { height: 28px; width: auto; color: var(--color-navy); }

.nav-desktop { display: flex; gap: var(--space-8); }
.nav-link {
  font-size: var(--text-sm); font-weight: 500;
  color: var(--color-text-muted); text-decoration: none;
}
.nav-link:hover { color: var(--color-text); }

.header-actions { display: flex; align-items: center; gap: var(--space-4); }

.nav-toggle {
  display: none; flex-direction: column; gap: 5px; padding: 4px;
}
.nav-toggle span {
  width: 22px; height: 2px; background: var(--color-text);
  border-radius: 2px; transition: transform 0.3s, opacity 0.3s;
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0; z-index: 99;
  background: rgba(245, 246, 250, 0.98);
  backdrop-filter: blur(20px);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity 0.3s;
}
.mobile-menu.open { opacity: 1; pointer-events: auto; }
.mobile-menu nav {
  display: flex; flex-direction: column;
  gap: var(--space-6); text-align: center;
}
.mobile-menu nav a {
  font-size: var(--text-xl); font-weight: 700;
  color: var(--color-navy); text-decoration: none;
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */

.btn {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-family: var(--font-body); font-weight: 600; font-size: var(--text-sm);
  text-decoration: none; border-radius: var(--radius-md);
  padding: 0.625rem 1.25rem; white-space: nowrap; cursor: pointer;
}
.btn-sm { padding: 0.5rem 1rem; font-size: var(--text-xs); }
.btn-lg { padding: 0.875rem 1.75rem; font-size: var(--text-base); }

.btn-primary { background: var(--color-primary); color: #fff; border: none; }
.btn-primary:hover { background: var(--color-primary-hover); transform: translateY(-1px); }

.btn-ghost { background: transparent; color: var(--color-text); border: 1px solid var(--color-border); }
.btn-ghost:hover { border-color: var(--color-text-muted); background: var(--color-surface); }

.btn-ghost-light { background: transparent; color: rgba(255,255,255,0.9); border: 1px solid rgba(255,255,255,0.25); }
.btn-ghost-light:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.4); }

/* ==========================================================================
   HERO
   ========================================================================== */

.hero {
  padding-top: clamp(8rem, 15vh, 12rem);
  padding-bottom: clamp(var(--space-16), 10vh, var(--space-32));
  position: relative; overflow: hidden;
}
.hero-content { max-width: 780px; }
.hero-badge {
  display: inline-flex; font-size: var(--text-xs); font-weight: 600;
  color: var(--color-primary); background: rgba(59, 130, 246, 0.08);
  border: 1px solid rgba(59, 130, 246, 0.15);
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-full); margin-bottom: var(--space-6);
  letter-spacing: 0.02em;
}
.hero-title {
  font-size: var(--text-3xl); font-weight: 800;
  color: var(--color-navy); line-height: 1.05;
  margin-bottom: var(--space-6);
}
.text-gradient {
  background: linear-gradient(135deg, var(--color-primary), #60A5FA);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  font-size: var(--text-base); color: var(--color-text-muted);
  line-height: 1.7; max-width: 600px; margin-bottom: var(--space-8);
}
.hero-actions {
  display: flex; flex-wrap: wrap; gap: var(--space-4);
  margin-bottom: clamp(var(--space-10), 5vw, var(--space-16));
}
.hero-stats { display: flex; gap: clamp(var(--space-8), 4vw, var(--space-16)); flex-wrap: wrap; }
.stat { display: flex; flex-direction: column; gap: var(--space-1); }
.stat-value { font-size: var(--text-xl); font-weight: 800; color: var(--color-navy); }
.stat-label { font-size: var(--text-xs); color: var(--color-text-muted); max-width: 140px; }

.hero-glow {
  position: absolute; top: -200px; right: -200px;
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, transparent 70%);
  pointer-events: none; z-index: -1;
}

/* ==========================================================================
   TRUST BAR — text row on desktop, marquee on mobile
   ========================================================================== */

.trust-bar {
  padding: var(--space-10) 0;
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}
.trust-label {
  font-size: var(--text-xs); color: var(--color-text-faint);
  text-transform: uppercase; letter-spacing: 0.1em;
  font-weight: 600; margin-bottom: var(--space-6); text-align: center;
  width: fit-content; margin-inline: auto;
}
.trust-track-wrap {
  overflow: hidden;
  max-width: 900px;
  margin: 0 auto;
}
.trust-track {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.trust-name {
  font-size: var(--text-sm); font-weight: 700;
  color: var(--color-text-muted);
  white-space: nowrap;
}
.trust-sep {
  font-size: var(--text-sm); color: var(--color-text-faint);
  user-select: none;
}
/* Duplicate items hidden on desktop */
.trust-dup { display: none; }

/* ==========================================================================
   SECTION SHARED
   ========================================================================== */

.section-header { margin-bottom: clamp(var(--space-10), 5vw, var(--space-16)); }
.section-tag {
  display: inline-flex; font-size: var(--text-xs); font-weight: 700;
  color: var(--color-primary); text-transform: uppercase;
  letter-spacing: 0.1em; margin-bottom: var(--space-3);
}
.section-title {
  font-size: var(--text-2xl); font-weight: 800;
  color: var(--color-navy); line-height: 1.1;
  margin-bottom: var(--space-4);
}
.section-desc { font-size: var(--text-base); color: var(--color-text-muted); max-width: 560px; }

/* ==========================================================================
   SERVICES — all white cards
   ========================================================================== */

.services { padding: clamp(var(--space-16), 8vw, var(--space-32)) 0; }
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }

.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex; flex-direction: column;
  transition: box-shadow 0.3s, border-color 0.3s, transform 0.3s;
}
.service-card:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(59, 130, 246, 0.2);
  transform: translateY(-2px);
}
.service-icon {
  width: 48px; height: 48px; border-radius: var(--radius-md);
  background: rgba(59, 130, 246, 0.08); color: var(--color-primary);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: var(--space-5);
}
.service-name {
  font-size: var(--text-lg); font-weight: 700;
  color: var(--color-navy); margin-bottom: var(--space-3);
}
.service-desc {
  font-size: var(--text-sm); color: var(--color-text-muted);
  line-height: 1.6; margin-bottom: var(--space-5);
}
.service-features {
  list-style: none; display: flex; flex-direction: column;
  gap: var(--space-2); margin-bottom: var(--space-6); flex-grow: 1;
}
.service-features li {
  font-size: var(--text-xs); color: var(--color-text);
  padding-left: var(--space-5); position: relative; line-height: 1.5;
}
.service-features li::before {
  content: ''; position: absolute; left: 0; top: 0.45em;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--color-primary); opacity: 0.5;
}
.service-link {
  font-size: var(--text-sm); font-weight: 600;
  color: var(--color-primary); text-decoration: none;
}
.service-link:hover { color: var(--color-primary-hover); }

/* ==========================================================================
   CASES
   ========================================================================== */

.cases {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) 0;
  background: var(--color-surface);
}
.cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.case-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: box-shadow 0.3s, transform 0.3s;
}
.case-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }

.case-card--wide {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.case-content { padding: var(--space-8); }

.case-tag {
  display: inline-flex; font-size: var(--text-xs); font-weight: 600;
  color: var(--color-primary); background: rgba(59, 130, 246, 0.08);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full); margin-bottom: var(--space-4);
}
.case-title {
  font-size: var(--text-lg); font-weight: 700;
  color: var(--color-navy); margin-bottom: var(--space-2);
}
.case-client {
  font-size: var(--text-xs); color: var(--color-text-faint);
  margin-bottom: var(--space-3);
}
.case-desc {
  font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.6;
}
.case-results { display: flex; gap: var(--space-8); margin-top: var(--space-6); }
.case-metric { display: flex; flex-direction: column; gap: var(--space-1); }
.case-metric-value {
  font-size: var(--text-xl); font-weight: 800; color: var(--color-primary);
}
.case-metric-label { font-size: var(--text-xs); color: var(--color-text-muted); }

.case-visual {
  display: flex; align-items: center; justify-content: center;
  background: var(--color-surface-2); padding: var(--space-4);
  overflow: hidden;
}
.case-visual img {
  width: 100%; height: 100%; object-fit: cover;
  border-radius: var(--radius-md);
}

/* Case with image on top */
.case-card--visual { display: flex; flex-direction: column; }
.case-img-wrap {
  height: 220px; overflow: hidden;
  background: #111;
}
.case-img-wrap img {
  width: 100%; height: 100%; object-fit: cover;
}

/* MeMatter: phone screenshots */
.case-card--mematter { grid-template-columns: 1fr 1.3fr; }
.case-phones {
  display: flex; gap: var(--space-4);
  align-items: center; justify-content: center;
  padding: var(--space-6);
  background: linear-gradient(135deg, #f0f1f7, #e8eaf0);
  overflow: hidden;
}
.phone-img {
  width: 180px; height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  flex-shrink: 0;
}

/* Case row: 2 cards side by side */
.case-row-2 {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

.case-link {
  display: inline-block; font-size: var(--text-sm); font-weight: 600;
  color: var(--color-primary); text-decoration: none;
  margin-top: var(--space-4);
}
.case-link:hover { color: var(--color-primary-hover); }

/* ==========================================================================
   APPROACH
   ========================================================================== */

.approach { padding: clamp(var(--space-16), 8vw, var(--space-32)) 0; }

.approach-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6); margin-bottom: var(--space-10);
}
.approach-step {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-xl); padding: var(--space-8);
}
.approach-number {
  font-size: var(--text-3xl); font-weight: 800;
  color: rgba(59, 130, 246, 0.08); line-height: 1;
  margin-bottom: var(--space-4);
}
.approach-step-title {
  font-size: var(--text-lg); font-weight: 700;
  color: var(--color-navy); margin-bottom: var(--space-2);
}
.approach-step-time {
  font-size: var(--text-xs); font-weight: 600;
  color: var(--color-primary); margin-bottom: var(--space-4);
}
.approach-step-desc {
  font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.6;
}

.approach-advantages {
  display: flex; flex-wrap: wrap; gap: var(--space-6); justify-content: center;
}
.advantage {
  display: flex; align-items: center; gap: var(--space-2);
  font-size: var(--text-sm); font-weight: 500; color: var(--color-text);
}
.advantage svg { color: var(--color-primary); flex-shrink: 0; }

/* ==========================================================================
   TOOLS — clean uniform grid
   ========================================================================== */

.tools {
  padding: var(--space-12) 0;
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
  background: var(--color-surface);
}
.tools-label {
  font-size: var(--text-xs); color: var(--color-text-faint);
  text-transform: uppercase; letter-spacing: 0.1em;
  font-weight: 600; text-align: center; margin-bottom: var(--space-8);
  width: fit-content; margin-inline: auto;
}
.tools-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-4);
  max-width: 900px;
  margin: 0 auto;
}
.tool-item {
  display: flex; align-items: center; justify-content: center;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color 0.3s, box-shadow 0.3s;
}
.tool-item:hover {
  border-color: rgba(59, 130, 246, 0.25);
  box-shadow: var(--shadow-sm);
}
.tool-name {
  font-size: var(--text-xs); font-weight: 600;
  color: var(--color-text-muted); white-space: nowrap;
}

/* ==========================================================================
   TEAM — improved cards with avatars
   ========================================================================== */

.team { padding: clamp(var(--space-16), 8vw, var(--space-32)) 0; }
.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}
.team-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: box-shadow 0.3s, transform 0.3s;
}
.team-card:hover {
  box-shadow: var(--shadow-md); transform: translateY(-2px);
}
.team-header {
  display: flex; align-items: center; gap: var(--space-4);
  margin-bottom: var(--space-5);
}
.team-avatar {
  width: 48px; height: 48px; border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), #60A5FA);
  color: #fff; font-size: var(--text-sm); font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; letter-spacing: 0.02em;
}
.team-name {
  font-size: var(--text-base); font-weight: 700; color: var(--color-navy);
  margin-bottom: 2px;
}
.team-role {
  font-size: var(--text-xs); font-weight: 700;
  color: var(--color-primary); text-transform: uppercase;
  letter-spacing: 0.05em;
}
.team-bio {
  font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.65;
}

/* ==========================================================================
   CTA
   ========================================================================== */

.cta {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) 0;
  background: var(--color-navy);
}
.cta-inner {
  text-align: center; max-width: 700px; margin: 0 auto;
}
.cta-title {
  font-size: var(--text-2xl); font-weight: 800;
  color: #fff; line-height: 1.1; margin-bottom: var(--space-6);
}
.cta-desc {
  font-size: var(--text-base); color: rgba(255,255,255,0.7);
  margin-bottom: var(--space-8); max-width: 550px; margin-inline: auto;
}
.cta-actions {
  display: flex; justify-content: center; flex-wrap: wrap; gap: var(--space-4);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */

.footer {
  padding: var(--space-12) 0 var(--space-8);
  background: var(--color-bg);
  border-top: 1px solid var(--color-divider);
}
.footer-inner {
  display: flex; justify-content: space-between;
  align-items: flex-start; gap: var(--space-8);
  margin-bottom: var(--space-8);
}
.footer-brand { display: flex; flex-direction: column; gap: var(--space-2); }
.footer-logo-svg { height: 22px; width: auto; color: var(--color-navy); }
.footer-tagline { font-size: var(--text-sm); color: var(--color-text-muted); }

.footer-links { display: flex; gap: var(--space-6); }
.footer-links a { font-size: var(--text-sm); color: var(--color-text-muted); text-decoration: none; }
.footer-links a:hover { color: var(--color-text); }

.footer-contacts { display: flex; flex-direction: column; gap: var(--space-2); text-align: right; }
.footer-contacts a { font-size: var(--text-sm); color: var(--color-text-muted); text-decoration: none; }
.footer-contacts a:hover { color: var(--color-primary); }

.footer-bottom {
  display: flex; justify-content: center; align-items: center;
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  font-size: var(--text-xs); color: var(--color-text-faint);
}

/* ==========================================================================
   SCROLL ANIMATIONS
   ========================================================================== */

.js-reveal {
  opacity: 0; transform: translateY(20px);
  transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.js-reveal.visible { opacity: 1; transform: translateY(0); }

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */

@media (max-width: 1024px) {
  .services-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .case-card--wide { grid-template-columns: 1fr; }
  .case-card--mematter { grid-template-columns: 1fr; }
  .case-row-2 { grid-template-columns: 1fr; }
  .approach-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .tools-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 768px) {
  .nav-desktop { display: none; }
  .nav-toggle { display: flex; }
  .header-actions .btn { display: none; }

  .hero-title { font-size: clamp(2rem, 1rem + 5vw, 3.5rem); }
  .hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
  }
  .stat-value { font-size: clamp(1.25rem, 1rem + 1.5vw, 1.5rem); }
  .stat-label { font-size: 0.75rem; max-width: none; line-height: 1.35; }
  .hero-actions { flex-direction: column; width: 100%; }
  .hero-actions .btn { width: 100%; justify-content: center; }

  /* Trust bar: mobile marquee */
  .trust-track {
    justify-content: flex-start;
    flex-wrap: nowrap;
    gap: var(--space-4);
    animation: trustMarquee 18s linear infinite;
    width: max-content;
  }
  .trust-dup { display: inline; }

  .team-grid { grid-template-columns: 1fr; }
  .tools-grid { grid-template-columns: repeat(3, 1fr); }

  .phone-img { width: 140px; }
  .phone-img--hide-mobile { display: none; }



  .footer-inner { flex-direction: column; gap: var(--space-6); }
  .footer-contacts { text-align: left; }
  .footer-bottom { flex-direction: column; gap: var(--space-3); text-align: center; }

  .approach-advantages { flex-direction: column; align-items: flex-start; gap: var(--space-4); }

  .cta-title { font-size: var(--text-xl); }
  .cta-actions { flex-direction: column; align-items: center; }
}

@media (max-width: 480px) {
  .tools-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ==========================================================================
   MARQUEE KEYFRAMES
   ========================================================================== */

@keyframes trustMarquee {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}