/* ============================================
   AutoServisTop — Main Stylesheet
   Domain: autoservistop.ru
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;600;700;800;900&family=Inter:wght@300;400;500;600&display=swap');

/* ============================================
   CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================ */
:root {
  /* Colors */
  --clr-bg:          #0a0a0f;
  --clr-surface:     #111118;
  --clr-surface-2:   #181825;
  --clr-surface-3:   #1e1e2e;
  --clr-border:      rgba(255,255,255,0.07);
  --clr-border-2:    rgba(255,255,255,0.12);

  --clr-primary:     #e62e2e;
  --clr-primary-2:   #ff4444;
  --clr-accent:      #ff6a00;
  --clr-gold:        #f5a623;

  --clr-text:        #f0f0f5;
  --clr-text-2:      #a0a0b8;
  --clr-text-3:      #6a6a82;

  /* Gradients */
  --grad-primary:    linear-gradient(135deg, #e62e2e 0%, #ff6a00 100%);
  --grad-dark:       linear-gradient(180deg, #0a0a0f 0%, #15151f 100%);
  --grad-card:       linear-gradient(135deg, rgba(255,255,255,0.04) 0%, rgba(255,255,255,0.01) 100%);
  --grad-hero:       linear-gradient(135deg, rgba(10,10,15,0.95) 0%, rgba(20,10,10,0.8) 100%);
  --grad-glow:       radial-gradient(ellipse at center, rgba(230,46,46,0.15) 0%, transparent 70%);

  /* Typography */
  --font-heading:    'Montserrat', sans-serif;
  --font-body:       'Inter', sans-serif;

  /* Spacing */
  --space-xs:   0.5rem;
  --space-sm:   1rem;
  --space-md:   1.5rem;
  --space-lg:   2.5rem;
  --space-xl:   4rem;
  --space-2xl:  6rem;
  --space-3xl:  8rem;

  /* Border radius */
  --radius-sm:  8px;
  --radius-md:  14px;
  --radius-lg:  20px;
  --radius-xl:  30px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-card:    0 4px 24px rgba(0,0,0,0.4);
  --shadow-glow:    0 0 40px rgba(230,46,46,0.25);
  --shadow-btn:     0 4px 20px rgba(230,46,46,0.4);

  /* Transitions */
  --transition-fast:   0.15s ease;
  --transition-base:   0.3s ease;
  --transition-slow:   0.6s ease;

  /* Layout */
  --container-max:  1280px;
  --nav-height:     72px;
}

/* ============================================
   RESET & BASE
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul { list-style: none; }

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* ============================================
   LAYOUT UTILITIES
   ============================================ */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: var(--space-3xl) 0;
}

.section--sm {
  padding: var(--space-xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-md); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-md); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-md); }

/* Flex utilities */
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--clr-text);
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--clr-primary-2);
  background: rgba(230,46,46,0.1);
  border: 1px solid rgba(230,46,46,0.2);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-sm);
}

.section-tag::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--clr-primary-2);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
}

.section-title span {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--clr-text-2);
  max-width: 560px;
  margin: 0 auto;
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: background var(--transition-base), backdrop-filter var(--transition-base), box-shadow var(--transition-base);
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--clr-border), 0 8px 32px rgba(0,0,0,0.4);
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.nav-logo-icon {
  width: 42px;
  height: 42px;
  background: var(--grad-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: var(--shadow-glow);
}

.nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.nav-logo-main {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--clr-text);
}

.nav-logo-sub {
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--clr-primary-2);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0;
}

.nav-link {
  position: relative;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--clr-text-2);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
  white-space: nowrap;
}

.nav-link:hover, .nav-link.active {
  color: var(--clr-text);
  background: rgba(255,255,255,0.06);
}

.nav-link.active {
  color: var(--clr-primary-2);
  background: rgba(230,46,46,0.08);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 16px;
  right: 16px;
  height: 2px;
  background: var(--grad-primary);
  border-radius: 2px 2px 0 0;
}

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

.nav-phone {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--clr-text);
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}

.nav-phone svg {
  color: var(--clr-primary-2);
}

/* Mobile hamburger */
.nav-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  transition: background var(--transition-fast);
}

.nav-burger:hover { background: rgba(255,255,255,0.06); }

.nav-burger span {
  width: 24px;
  height: 2px;
  background: var(--clr-text);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-burger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger.active span:nth-child(2) { opacity: 0; }
.nav-burger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile menu */
.nav-mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: rgba(10, 10, 15, 0.98);
  backdrop-filter: blur(24px);
  padding: var(--space-md);
  border-bottom: 1px solid var(--clr-border);
  flex-direction: column;
  gap: 8px;
  transform: translateY(-100%);
  transition: transform var(--transition-base);
  z-index: 999;
}

.nav-mobile.open {
  display: flex;
  transform: translateY(0);
}

.nav-mobile .nav-link {
  font-size: 1rem;
  padding: 12px 16px;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  padding: 14px 28px;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), opacity var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: background var(--transition-fast);
}

.btn:hover::before {
  background: rgba(255,255,255,0.08);
}

.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--grad-primary);
  color: #fff;
  box-shadow: var(--shadow-btn);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(230,46,46,0.5);
}

.btn-outline {
  background: transparent;
  color: var(--clr-text);
  border: 1.5px solid var(--clr-border-2);
}

.btn-outline:hover {
  border-color: var(--clr-primary-2);
  color: var(--clr-primary-2);
  transform: translateY(-2px);
}

.btn-ghost {
  background: rgba(255,255,255,0.06);
  color: var(--clr-text);
}

.btn-ghost:hover {
  background: rgba(255,255,255,0.1);
}

.btn-lg {
  font-size: 1rem;
  padding: 18px 36px;
}

.btn-sm {
  font-size: 0.8rem;
  padding: 10px 20px;
}

/* ============================================
   CARDS
   ============================================ */
.card {
  background: var(--grad-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--grad-card);
  z-index: -1;
}

.card:hover {
  transform: translateY(-6px);
  border-color: rgba(230,46,46,0.25);
  box-shadow: var(--shadow-card), 0 0 30px rgba(230,46,46,0.08);
}

.card-icon {
  width: 56px;
  height: 56px;
  background: rgba(230,46,46,0.1);
  border: 1px solid rgba(230,46,46,0.2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--space-md);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.card:hover .card-icon {
  background: rgba(230,46,46,0.18);
  box-shadow: 0 0 20px rgba(230,46,46,0.15);
}

.card-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.card-text {
  font-size: 0.9rem;
  color: var(--clr-text-2);
  line-height: 1.7;
}

/* ============================================
   BADGES & LABELS
   ============================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: var(--radius-full);
}

.badge-primary {
  background: rgba(230,46,46,0.15);
  color: var(--clr-primary-2);
  border: 1px solid rgba(230,46,46,0.25);
}

.badge-gold {
  background: rgba(245,166,35,0.15);
  color: var(--clr-gold);
  border: 1px solid rgba(245,166,35,0.25);
}

/* ============================================
   DIVIDERS
   ============================================ */
.divider {
  width: 60px;
  height: 3px;
  background: var(--grad-primary);
  border-radius: 3px;
  margin: var(--space-sm) auto;
}

.divider-left {
  margin-left: 0;
}

/* ============================================
   FORM ELEMENTS
   ============================================ */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--clr-text-2);
}

.form-input,
.form-select,
.form-textarea {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--clr-border-2);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  color: var(--clr-text);
  font-size: 0.95rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
  outline: none;
  width: 100%;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--clr-text-3);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--clr-primary);
  background: rgba(230,46,46,0.04);
  box-shadow: 0 0 0 3px rgba(230,46,46,0.1);
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%236a6a82' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14L2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 44px;
  cursor: pointer;
}

.form-select option {
  background: var(--clr-surface-2);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
  line-height: 1.6;
}

/* ============================================
   SCROLLBAR
   ============================================ */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--clr-bg);
}

::-webkit-scrollbar-thumb {
  background: #2a2a3a;
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--clr-primary);
}

/* ============================================
   PAGE HERO (internal pages)
   ============================================ */
.page-hero {
  padding-top: calc(var(--nav-height) + var(--space-xl));
  padding-bottom: var(--space-xl);
  background: linear-gradient(180deg, rgba(230,46,46,0.05) 0%, transparent 100%);
  position: relative;
  overflow: hidden;
  text-align: center;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: var(--grad-glow);
  pointer-events: none;
}

.page-hero-tag {
  margin-bottom: var(--space-sm);
}

.page-hero-title {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-sm);
}

.page-hero-text {
  font-size: 1.1rem;
  color: var(--clr-text-2);
  max-width: 560px;
  margin: 0 auto;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--clr-surface);
  border-top: 1px solid var(--clr-border);
  padding: var(--space-xl) 0 var(--space-lg);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--clr-text-2);
  margin-top: var(--space-sm);
  line-height: 1.7;
  max-width: 260px;
}

.footer-heading {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--clr-text-3);
  margin-bottom: var(--space-md);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link {
  font-size: 0.9rem;
  color: var(--clr-text-2);
  transition: color var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-link:hover { color: var(--clr-primary-2); }

.footer-link svg { flex-shrink: 0; }

.footer-contacts {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--clr-text-2);
}

.footer-contact-icon {
  width: 32px;
  height: 32px;
  background: rgba(230,46,46,0.1);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-primary-2);
  flex-shrink: 0;
  margin-top: -2px;
}

.footer-bottom {
  padding-top: var(--space-md);
  border-top: 1px solid var(--clr-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--clr-text-3);
}

.footer-bottom a {
  color: var(--clr-primary-2);
  transition: opacity var(--transition-fast);
}

.footer-bottom a:hover { opacity: 0.8; }

/* ============================================
   SOCIAL ICONS
   ============================================ */
.social-links {
  display: flex;
  gap: 10px;
  margin-top: var(--space-md);
}

.social-link {
  width: 38px;
  height: 38px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--clr-border-2);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-text-2);
  transition: all var(--transition-fast);
}

.social-link:hover {
  background: rgba(230,46,46,0.1);
  border-color: rgba(230,46,46,0.3);
  color: var(--clr-primary-2);
  transform: translateY(-2px);
}

/* ============================================
   STATS
   ============================================ */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--clr-border);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.stat-item {
  background: var(--clr-surface);
  padding: var(--space-lg) var(--space-md);
  text-align: center;
}

.stat-num {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 900;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--clr-text-2);
  margin-top: 6px;
}

/* ============================================
   SCROLL REVEAL
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* ============================================
   GLOW EFFECTS
   ============================================ */
.glow-dot {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}

.glow-red {
  background: rgba(230,46,46,0.2);
}

.glow-orange {
  background: rgba(255,106,0,0.15);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root {
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 5rem;
  }

  .grid-2,
  .grid-3,
  .grid-4 { grid-template-columns: 1fr; }

  .nav-links,
  .nav-actions { display: none; }

  .nav-burger { display: flex; }

  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: var(--space-sm); text-align: center; }

  .stats-bar { grid-template-columns: repeat(2, 1fr); }

  .section-title { font-size: 1.8rem; }
}

@media (max-width: 480px) {
  .stats-bar { grid-template-columns: 1fr; }
  .btn-lg { padding: 14px 24px; font-size: 0.9rem; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}