/* ==========================================================================
   Промышленная стилистика «Айтек.Наработка» (Counter)
   Палитра: 
   - Глубокий графит / Индустриальный темный: #0b1120, #0f172a, #1e293b
   - Технический серый / Границы: #334155, #475569, #94a3b8, #cbd5e1, #f1f5f9, #ffffff
   - Сигнальный янтарь / Акцент: #d97706, #f59e0b, #b45309, #fef3c7
   - Индустриальный бирюзово-зеленый (статус/Modbus): #10b981, #059669
   ========================================================================== */

:root {
  --color-bg-main: #0b1120;
  --color-bg-card: #0f172a;
  --color-bg-card-alt: #1e293b;
  --color-border: #334155;
  --color-border-light: #475569;
  --color-text-primary: #f8fafc;
  --color-text-secondary: #94a3b8;
  --color-text-muted: #64748b;
  --color-accent: #f59e0b;
  --color-accent-hover: #d97706;
  --color-accent-dark: #b45309;
  --color-accent-glow: rgba(245, 158, 11, 0.15);
  --color-success: #10b981;
  --color-danger: #ef4444;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;
  --max-width: 1200px;
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--color-bg-main);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(30, 41, 59, 0.5) 0%, transparent 60%),
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 100% 100%, 40px 40px, 40px 40px;
  background-position: 0 0, -1px -1px, -1px -1px;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-hover);
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ==========================================================================
   Desktop Scroll-Snap Navigation
   ========================================================================== */
@media (min-width: 1024px) {
  html {
    scroll-behavior: smooth;
    scroll-snap-type: y proximity;
  }

  header.hero-section,
  section {
    scroll-snap-align: start;
    scroll-snap-stop: normal;
    scroll-margin-top: 80px; /* Защита от перекрытия фиксированной шапкой */
  }
}

@media (max-width: 1023px) {
  html {
    scroll-snap-type: none;
  }
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(11, 17, 32, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  padding: 0.85rem 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.logo-wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--color-accent-dark), var(--color-accent));
  color: #0b1120;
  font-weight: 800;
  font-family: var(--font-mono);
  font-size: 1.25rem;
  border-radius: var(--border-radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 0 15px var(--color-accent-glow);
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-title {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  line-height: 1.2;
}

.logo-tagline {
  font-size: 0.72rem;
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 1.5rem;
}

.nav-link {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-text-primary);
}

.header-cta {
  display: flex;
  align-items: center;
}

/* ==========================================================================
   Buttons & UI Elements
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.75rem 1.4rem;
  border-radius: var(--border-radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
  line-height: 1.2;
}

.btn-primary {
  background: linear-gradient(180deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
  color: #0b1120;
  border-color: #f59e0b;
  font-weight: 700;
  box-shadow: 0 4px 14px rgba(217, 119, 6, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(180deg, #fbbf24 0%, var(--color-accent) 100%);
  color: #000;
  box-shadow: 0 6px 20px rgba(217, 119, 6, 0.5);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--color-bg-card-alt);
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background-color: #273549;
  border-color: var(--color-border-light);
  color: #fff;
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.65rem;
  border-radius: var(--border-radius-sm);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  font-weight: 600;
  background-color: rgba(30, 41, 59, 0.8);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}

.badge-accent {
  background-color: rgba(217, 119, 6, 0.12);
  border-color: rgba(217, 119, 6, 0.4);
  color: #fcd34d;
}

.badge-success {
  background-color: rgba(16, 185, 129, 0.12);
  border-color: rgba(16, 185, 129, 0.4);
  color: #34d399;
}

.section-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  max-width: 780px;
  margin-bottom: 3rem;
  line-height: 1.6;
}

.section-subtitle.center {
  margin-left: auto;
  margin-right: auto;
}

.text-center {
  text-align: center;
}

/* ==========================================================================
   Section 1: Hero Section
   ========================================================================== */

.hero-section {
  padding: 5rem 0 4rem;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-supertitle {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--color-accent);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.hero-supertitle::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-accent);
  box-shadow: 0 0 8px var(--color-accent);
}

.hero-title {
  font-size: 2.85rem;
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
  color: #fff;
}

.hero-lead {
  font-size: 1.15rem;
  color: #cbd5e1;
  line-height: 1.65;
  margin-bottom: 2rem;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.hero-guarantee {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

.hero-badges-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* Hero Terminal Mockup */
.tech-terminal {
  background: #090d16;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6), 0 0 30px rgba(15, 23, 42, 0.8);
  overflow: hidden;
}

.terminal-header {
  background-color: var(--color-bg-card-alt);
  padding: 0.6rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-border);
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #10b981; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-text-secondary);
}

.terminal-body {
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: #e2e8f0;
  line-height: 1.7;
}

.terminal-row {
  display: flex;
  justify-content: space-between;
  padding: 0.35rem 0;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.05);
}

.terminal-row:last-child {
  border-bottom: none;
}

.terminal-label {
  color: var(--color-text-secondary);
}

.terminal-val {
  font-weight: 700;
  color: #f8fafc;
}

.terminal-val.active {
  color: #34d399;
}

.terminal-val.accent {
  color: #fbbf24;
}

.terminal-spec-box {
  margin-top: 1rem;
  padding: 0.75rem;
  background: rgba(15, 23, 42, 0.8);
  border-left: 3px solid var(--color-accent);
  font-size: 0.75rem;
  color: #94a3b8;
}

/* ==========================================================================
   Section 2: Loss Calculator & Pains
   ========================================================================== */

.losses-section {
  padding: 5rem 0;
  background-color: rgba(15, 23, 42, 0.4);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.losses-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.loss-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  padding: 1.75rem 1.25rem;
  position: relative;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.loss-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
}

.loss-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-accent);
  background: var(--color-accent-glow);
  border: 1px solid rgba(245, 158, 11, 0.35);
  border-radius: var(--border-radius-sm);
  padding: 0.25rem 0.6rem;
  margin-bottom: 0.85rem;
  letter-spacing: 0.03em;
}

.loss-metric {
  font-size: 2rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: #ef4444;
  margin-bottom: 0.75rem;
  line-height: 1.1;
}

.loss-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #f8fafc;
  margin-bottom: 0.75rem;
}

.loss-desc {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.loss-calc-banner {
  margin-top: 3rem;
  background: linear-gradient(90deg, #1e293b, #0f172a);
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius-md);
  padding: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.calc-banner-text h4 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.calc-banner-text p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

/* ==========================================================================
   Section 3: SCADA Industry Matrix
   ========================================================================== */

.cases-section {
  padding: 5rem 0;
  position: relative;
}

.scada-section-header {
  margin-bottom: 2.5rem;
}

/* SCADA Tabs */
.scada-tabs-wrap {
  margin-bottom: 2rem;
}

.scada-tabs-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--color-border);
  padding: 0.4rem;
  border-radius: var(--border-radius-md);
}

.scada-tab-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--color-text-secondary);
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.6rem 1.15rem;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.scada-tab-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.04);
}

.scada-tab-btn.active {
  background: var(--color-bg-card-alt);
  border-color: rgba(245, 158, 11, 0.4);
  color: #f8fafc;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

/* Tab Panes */
.scada-tab-pane {
  display: none;
}

.scada-tab-pane.active {
  display: block;
}

/* SCADA Grid */
.scada-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1.15rem 0.85rem;
  position: relative;
}

/* SCADA Card */
.scada-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 155px;
  cursor: pointer;
  transition: transform 0.22s cubic-bezier(0.16, 1, 0.3, 1),
              border-color 0.2s ease,
              box-shadow 0.22s ease;
  z-index: 1;
}

.scada-card-surface {
  padding: 1.15rem 1.15rem 1rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.scada-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.scada-badge {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: var(--border-radius-sm);
  padding: 0.2rem 0.5rem;
  letter-spacing: 0.04em;
}

.scada-icon-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
}

.scada-icon {
  width: 22px;
  height: 22px;
  stroke: currentColor;
}

.scada-card-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: #f8fafc;
  line-height: 1.35;
  margin: 0;
}

.scada-expand-btn {
  display: none;
}

/* Desktop Hover Curtain (Инженерный лифт) */
@media (min-width: 768px) {
  .scada-card:hover,
  .scada-card:focus-within {
    transform: translateY(-6px);
    border-color: var(--color-accent);
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.75), 0 0 0 1px rgba(245, 158, 11, 0.4);
    z-index: 30;
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
  }

  .scada-curtain {
    position: absolute;
    top: calc(100% - 1px);
    left: -1px;
    right: -1px;
    background: #0d1527;
    border: 1px solid var(--color-accent);
    border-top: 1px dashed rgba(245, 158, 11, 0.35);
    border-radius: 0 0 var(--border-radius-md) var(--border-radius-md);
    box-shadow: 0 20px 42px rgba(0, 0, 0, 0.85);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
    pointer-events: none;
    z-index: 31;
    padding: 1rem 1.15rem 1.25rem;
  }

  .scada-card:hover .scada-curtain,
  .scada-card:focus-within .scada-curtain {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
  }
}

.scada-curtain-block {
  margin-bottom: 0.75rem;
}

.scada-curtain-block:last-child {
  margin-bottom: 0;
}

.scada-curtain-label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.25rem;
  color: #38bdf8;
}

.scada-curtain-result-label {
  color: #10b981;
}

.scada-curtain-text {
  font-size: 0.8rem;
  color: #94a3b8;
  line-height: 1.45;
  margin: 0;
}

.scada-curtain-result-text {
  color: #e2e8f0;
}

.scada-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  display: inline-block;
}

.scada-dot-cyan {
  background: #38bdf8;
  box-shadow: 0 0 6px rgba(56, 189, 248, 0.6);
}

.scada-dot-green {
  background: #10b981;
  box-shadow: 0 0 6px rgba(16, 185, 129, 0.6);
}

/* Tablet Breakpoints */
@media (max-width: 1199px) and (min-width: 768px) {
  .scada-grid {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  }
}

/* Mobile Accordion (< 768px) */
@media (max-width: 767px) {
  .scada-tabs-nav {
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 0.6rem;
    -webkit-overflow-scrolling: touch;
  }

  .scada-tab-btn {
    font-size: 0.82rem;
    padding: 0.5rem 0.9rem;
    flex-shrink: 0;
  }

  .scada-grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .scada-card {
    min-height: auto;
    height: auto;
    padding: 0.95rem;
  }

  .scada-card-surface {
    padding: 0;
  }

  .scada-card:hover {
    transform: none;
    box-shadow: none;
    border-color: var(--color-border);
  }

  .scada-card.active {
    border-color: var(--color-accent);
    box-shadow: 0 4px 18px rgba(0, 0, 0, 0.45);
  }

  .scada-expand-btn {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 0.75rem;
    padding-top: 0.6rem;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    color: var(--color-accent);
    font-family: var(--font-mono);
    font-size: 0.76rem;
    font-weight: 600;
  }

  .scada-chevron {
    width: 16px;
    height: 16px;
    transition: transform 0.25s ease;
  }

  .scada-card.active .scada-chevron {
    transform: rotate(180deg);
  }

  .scada-curtain {
    position: static;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transform: none;
    visibility: visible;
    pointer-events: auto;
    padding: 0;
    background: transparent;
    border: none;
    box-shadow: none;
    transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.25s ease,
                margin 0.25s ease,
                padding 0.25s ease;
  }

  .scada-card.active .scada-curtain {
    max-height: 600px;
    opacity: 1;
    margin-top: 0.85rem;
    padding-top: 0.85rem;
    border-top: 1px dashed rgba(245, 158, 11, 0.35);
  }
}


/* ==========================================================================
   Section 4: Architecture (Mesh / Modbus)
   ========================================================================== */

.architecture-section {
  padding: 5rem 0;
  background-color: rgba(15, 23, 42, 0.3);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.arch-pipeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin-bottom: 3rem;
  position: relative;
}

.arch-step {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  position: relative;
}

.arch-step-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--color-accent);
  background: rgba(217, 119, 6, 0.1);
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: var(--border-radius-sm);
  width: fit-content;
}

.arch-step-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
}

.arch-step-desc {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.arch-features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.arch-feature-box {
  background: var(--color-bg-card-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  padding: 1.5rem;
}

.arch-feature-box h4 {
  font-size: 1.05rem;
  color: #f8fafc;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.arch-feature-box p {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
}

/* ==========================================================================
   Section 5: Direct Comparison Matrix
   ========================================================================== */

.comparison-section {
  padding: 5rem 0;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--color-border);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
  background-color: var(--color-bg-card);
}

.comparison-table th,
.comparison-table td {
  padding: 1.15rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
  border-right: 1px solid rgba(51, 65, 85, 0.4);
}

.comparison-table th:last-child,
.comparison-table td:last-child {
  border-right: none;
}

.comparison-table thead th {
  background-color: var(--color-bg-card-alt);
  font-weight: 700;
  color: #f8fafc;
  font-size: 0.95rem;
}

.comparison-table thead th.col-counter {
  background-color: rgba(217, 119, 6, 0.15);
  border-top: 3px solid var(--color-accent);
  color: #fbbf24;
}

.comparison-table tbody tr:hover {
  background-color: rgba(255, 255, 255, 0.02);
}

.comparison-table tbody td.col-counter {
  background-color: rgba(217, 119, 6, 0.04);
  font-weight: 600;
  color: #f8fafc;
  border-left: 1px solid rgba(217, 119, 6, 0.3);
  border-right: 1px solid rgba(217, 119, 6, 0.3);
}

.param-name {
  font-weight: 600;
  color: #e2e8f0;
}

.status-tag {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: var(--border-radius-sm);
  font-size: 0.78rem;
  font-weight: 600;
  font-family: var(--font-mono);
}

.status-positive {
  background-color: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.status-negative {
  background-color: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.status-warning {
  background-color: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

/* ==========================================================================
   Section 6: Pilot Testing (ОПЭ 14 Days)
   ========================================================================== */

.pilot-section {
  padding: 5rem 0;
  background-color: rgba(15, 23, 42, 0.4);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.pilot-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.pilot-info h3 {
  font-size: 1.85rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 1rem;
}

.pilot-info p {
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
  font-size: 1rem;
}

.kit-contents-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  padding: 1.75rem;
  margin-bottom: 1.5rem;
}

.kit-contents-card h4 {
  font-size: 1.05rem;
  margin-bottom: 1rem;
  color: #f8fafc;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.kit-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  font-size: 0.92rem;
  color: #cbd5e1;
}

.kit-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
}

.kit-list li::before {
  content: "✔";
  color: var(--color-accent);
  font-weight: bold;
}

.deposit-tag-box {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  background: rgba(217, 119, 6, 0.1);
  border: 1px solid rgba(217, 119, 6, 0.3);
  padding: 1rem 1.25rem;
  border-radius: var(--border-radius-md);
}

.deposit-val {
  font-size: 1.6rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: #fbbf24;
  white-space: nowrap;
}

.deposit-terms {
  font-size: 0.82rem;
  color: #cbd5e1;
  line-height: 1.4;
}

/* 3 Outcomes Box */
.pilot-outcomes {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.outcome-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  padding: 1.25rem 1.5rem;
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  transition: border-color var(--transition-fast);
}

.outcome-card:hover {
  border-color: var(--color-border-light);
}

.outcome-num {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 800;
  width: 32px;
  height: 32px;
  background: var(--color-bg-card-alt);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  flex-shrink: 0;
}

.outcome-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.3rem;
}

.outcome-desc {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
}

/* ==========================================================================
   Section 7: Engineering FAQ (Accordion)
   ========================================================================== */

.faq-section {
  padding: 5rem 0;
}

.faq-container {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  margin-bottom: 1rem;
  background: var(--color-bg-card);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item.active {
  border-color: var(--color-accent);
}

.faq-question {
  width: 100%;
  padding: 1.35rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.05rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.faq-question:hover {
  background-color: rgba(255, 255, 255, 0.02);
}

.faq-icon {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--color-accent);
  transition: transform var(--transition-normal);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0, 1, 0, 1);
  padding: 0 1.5rem;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding-bottom: 1.5rem;
  transition: max-height 0.35s cubic-bezier(1, 0, 1, 0);
}

/* ==========================================================================
   Section 8: Lead Form (Booking Pilot OPE)
   ========================================================================== */

.form-section {
  padding: 5rem 0 6rem;
  background: radial-gradient(circle at 50% 50%, rgba(217, 119, 6, 0.08) 0%, rgba(11, 17, 32, 0.95) 70%);
  border-top: 1px solid var(--color-border);
}

.form-wrapper {
  max-width: 760px;
  margin: 0 auto;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: 3rem 2.5rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
}

.form-header {
  text-align: center;
  margin-bottom: 2.25rem;
}

.form-header h2 {
  font-size: 2rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 0.5rem;
}

.form-header p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

.lead-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: #cbd5e1;
}

.form-label .required {
  color: #ef4444;
}

.form-control {
  background-color: var(--color-bg-card-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  padding: 0.85rem 1rem;
  color: #fff;
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.2);
}

.form-control::placeholder {
  color: var(--color-text-muted);
}

select.form-control {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11.5l-5-5h10l-5 5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

select.form-control option {
  background-color: var(--color-bg-card-alt);
  color: #fff;
}

.form-checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.82rem;
  color: var(--color-text-secondary);
  cursor: pointer;
  line-height: 1.4;
  margin-top: 0.5rem;
}

.form-checkbox-label input[type="checkbox"] {
  margin-top: 0.15rem;
  cursor: pointer;
  accent-color: var(--color-accent);
  width: 16px;
  height: 16px;
}

.form-submit-btn {
  margin-top: 0.75rem;
  width: 100%;
}

.form-status {
  margin-top: 1rem;
  padding: 0.85rem;
  border-radius: var(--border-radius-sm);
  font-size: 0.9rem;
  display: none;
}

.form-status.success {
  display: block;
  background-color: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.4);
  color: #34d399;
}

.form-status.error {
  display: block;
  background-color: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.4);
  color: #f87171;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  background-color: #070a12;
  border-top: 1px solid var(--color-border);
  padding: 3.5rem 0 2rem;
  color: var(--color-text-secondary);
  font-size: 0.88rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-about p {
  margin-top: 1rem;
  line-height: 1.6;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.footer-col-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: #f8fafc;
  margin-bottom: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.footer-links a {
  color: var(--color-text-secondary);
}

.footer-links a:hover {
  color: var(--color-text-primary);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(51, 65, 85, 0.5);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  flex-wrap: wrap;
  gap: 1rem;
}

/* ==========================================================================
   Modal Dialog
   ========================================================================== */

.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(5px);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.modal-window {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  max-width: 520px;
  width: 90%;
  padding: 2.5rem 2rem;
  text-align: center;
  transform: scale(0.95);
  transition: transform var(--transition-normal);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.8);
}

.modal-backdrop.open .modal-window {
  transform: scale(1);
}

.modal-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: rgba(16, 185, 129, 0.15);
  color: #10b981;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin: 0 auto 1.25rem;
  border: 1px solid rgba(16, 185, 129, 0.4);
}

.modal-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.75rem;
}

.modal-desc {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin-bottom: 1.75rem;
}

/* ==========================================================================
   Responsive Breakpoints (Mobile / Tablet)
   ========================================================================== */

@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .losses-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .arch-pipeline {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .pilot-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none; /* simple mobile fallback or toggle */
  }
  .hero-title {
    font-size: 2.1rem;
  }
  .section-title {
    font-size: 1.75rem;
  }
  .cases-grid {
    grid-template-columns: 1fr;
  }
  .arch-features-grid {
    grid-template-columns: 1fr;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .form-wrapper {
    padding: 2rem 1.5rem;
  }
  .loss-calc-banner {
    flex-direction: column;
    text-align: center;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .losses-grid {
    grid-template-columns: 1fr;
  }
  .arch-pipeline {
    grid-template-columns: 1fr;
  }
  .hero-cta-group {
    flex-direction: column;
    align-items: stretch;
  }
}