/* ============================================
   ПРЕЗЕНТАЦИЯ: БЕЗОПАСНАЯ ДОРОГА ДЕТСТВА
   ============================================ */
:root {
  --color-bg: #f8fafc;
  --color-bg-elevated: #ffffff;
  --color-bg-muted: #f1f5f9;
  --color-primary: #0066cc;
  --color-primary-soft: rgba(0, 102, 204, 0.12);
  --color-secondary: #ff8c00;
  --color-secondary-soft: rgba(255, 140, 0, 0.12);
  --color-accent: #ff4d4d;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --shadow-soft: 0 10px 25px rgba(0,0,0,0.05);
  --shadow-strong: 0 20px 60px rgba(0,0,0,0.12);
  --transition-fast: 0.18s ease-out;
  --transition-med: 0.25s ease-out;
  --max-width: 1120px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body {
  margin: 0; padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* ============================================
   HEADER
   ============================================ */
.pres-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
  background: rgba(255,255,255,0.85);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 2px 20px rgba(0,0,0,0.03);
}
.pres-header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 12px 20px;
}
.logo { display: flex; align-items: center; gap: 10px; white-space: nowrap; }
.logo-mark {
  background: var(--color-primary);
  color: #fff;
  border-radius: 999px;
  padding: 6px 10px;
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 0.08em;
}
.logo-text { font-size: 13px; color: var(--color-text-muted); font-weight: 500; }
.pres-nav { display: flex; gap: 6px; flex-wrap: wrap; }
.pres-nav a {
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}
.pres-nav a:hover { background: var(--color-primary-soft); color: var(--color-primary); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 20px; border-radius: 999px; border: none;
  font-size: 14px; font-weight: 600; cursor: pointer; transition: all var(--transition-med);
}
.btn-primary { background: var(--color-primary); color: #fff; box-shadow: 0 4px 12px rgba(0,102,204,0.3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,102,204,0.4); background: #0052a3; }
.btn-light { background: #fff; color: var(--color-primary); border: 1px solid var(--color-border); }
.btn-light:hover { background: var(--color-bg-muted); }
.btn-sm { padding: 6px 14px; font-size: 12px; }
.btn-lg { padding: 14px 28px; font-size: 16px; }

.section-nav{position:fixed;top:48px;left:0;right:0;z-index:99;background:rgba(255,255,255,0.95);backdrop-filter:blur(12px);border-bottom:1px solid var(--color-border)}
.section-nav-inner{display:flex;gap:8px;padding:8px 20px;overflow-x:auto;scrollbar-width:none}
.section-nav-inner::-webkit-scrollbar{display:none}
.section-nav-inner a{flex-shrink:0;padding:6px 14px;border-radius:999px;font-size:13px;font-weight:500;color:var(--color-text-muted);border:1px solid transparent;transition:all 0.2s;white-space:nowrap}
.section-nav-inner a:hover{color:var(--color-primary);background:var(--color-primary-soft)}
@media(max-width:900px){.pres-nav{display:none;}.section-nav{top:48px}}

@media (max-width: 900px) {
  .pres-nav { display: none; }
  .pres-header-inner { flex-wrap: wrap; }
}

/* ============================================
   SLIDES — BASE
   ============================================ */
.pres-slide {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 100px 0 60px;
  overflow: hidden;
}
.pres-slide-content {
  position: relative;
  z-index: 2;
}
.pres-slide-number {
  font-size: clamp(60px, 10vw, 120px);
  font-weight: 900;
  color: rgba(0,0,0,0.04);
  line-height: 1;
  margin-bottom: -20px;
  user-select: none;
}
.pres-slide-dark .pres-slide-number { color: rgba(255,255,255,0.06); }
.pres-section-title {
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
  color: #0f172a;
}
.pres-slide-dark .pres-section-title { color: #f1f5f9; }
.pres-accent { color: var(--color-secondary); }
.pres-lead {
  font-size: 17px;
  line-height: 1.7;
  color: var(--color-text-muted);
  max-width: 700px;
  margin-bottom: 32px;
}
.pres-text {
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: 24px;
}
.pres-subtitle {
  font-size: 20px;
  font-weight: 700;
  margin: 32px 0 16px;
  color: #0f172a;
}
.pres-slide-dark .pres-subtitle { color: #e2e8f0; }

/* ============================================
   BACKGROUNDS
   ============================================ */
.pres-slide-dark {
  background: linear-gradient(135deg, #0a1628 0%, #0f2847 50%, #1a3a5c 100%);
  color: #f1f5f9;
}
.pres-slide-dark .pres-lead,
.pres-slide-dark .pres-text { color: #94a3b8; }
.pres-slide-light { background: #ffffff; }
.pres-slide-gradient {
  background: linear-gradient(135deg, #e0f2fe 0%, #f0f9ff 50%, #f8fafc 100%);
}

/* ============================================
   HERO (SLIDE 1)
   ============================================ */
.pres-hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0a1628 0%, #0f2847 40%, #1a3a5c 70%, #0f2847 100%);
  color: #fff;
  text-align: center;
  padding-top: 60px;
}
.pres-slide-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.pres-hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.25;
  filter: blur(2px);
}
.pres-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,22,40,0.85) 0%, rgba(15,40,71,0.7) 50%, rgba(26,58,92,0.8) 100%);
}
.pres-hero-content { text-align: center; }
.pres-hero-badge {
  display: inline-flex;
  padding: 8px 20px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #93c5fd;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(147,197,253,0.2);
  margin-bottom: 24px;
}
.pres-hero-title {
  font-size: clamp(40px, 8vw, 80px);
  font-weight: 900;
  line-height: 1.05;
  margin-bottom: 0;
}
.pres-hero-line { display: block; }
.pres-hero-line.accent {
  color: var(--color-secondary);
  text-shadow: 0 0 40px rgba(255,140,0,0.3);
}
.pres-hero-divider {
  width: 80px;
  height: 4px;
  background: var(--color-secondary);
  border-radius: 999px;
  margin: 24px auto;
}
.pres-hero-sub {
  font-size: 18px;
  color: #cbd5e1;
  max-width: 500px;
  margin: 0 auto 32px;
  line-height: 1.6;
}
.pres-scroll-hint {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 5;
}
.pres-scroll-arrow {
  width: 24px;
  height: 24px;
  border-right: 2px solid rgba(255,255,255,0.4);
  border-bottom: 2px solid rgba(255,255,255,0.4);
  transform: rotate(45deg);
  animation: scrollBounce 2s infinite;
}
@keyframes scrollBounce {
  0%, 100% { transform: rotate(45deg) translate(0, 0); opacity: 0.4; }
  50% { transform: rotate(45deg) translate(5px, 5px); opacity: 1; }
}

/* ============================================
   GRIDS
   ============================================ */
.pres-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: stretch;
  margin-bottom: 24px;
}
@media (max-width: 860px) {
  .pres-grid-2 { grid-template-columns: 1fr; }
}

/* ============================================
   CARDS
   ============================================ */
.pres-card {
  background: var(--color-bg-elevated);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: 28px;
  box-shadow: var(--shadow-soft);
  transition: transform var(--transition-med), box-shadow var(--transition-med);
  display: flex;
  flex-direction: column;
}
.pres-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-strong);
}
.pres-card-icon { font-size: 36px; margin-bottom: 12px; }
.pres-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 8px; color: #0f172a; }
.pres-card p { font-size: 15px; line-height: 1.6; color: var(--color-text-muted); margin: 0; }
.pres-card-goal { border-top: 4px solid var(--color-primary); }
.pres-card-audience { border-top: 4px solid var(--color-secondary); }

/* ============================================
   HIGHLIGHT BOX / ALERT
   ============================================ */
.pres-highlight-box {
  background: var(--color-bg-elevated);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: 20px 24px;
  margin-bottom: 16px;
}
.pres-highlight-box.pres-alert {
  border-left: 4px solid var(--color-accent);
  background: rgba(255,77,77,0.04);
}
.pres-alert-icon { font-size: 20px; margin-right: 10px; float: left; }
.pres-highlight-box strong { color: var(--color-text); }
.pres-highlight-box p { margin: 0; }
.pres-stat-row {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}
.pres-stat-item { flex: 1; min-width: 200px; }
.pres-stat-value {
  display: block;
  font-size: 28px;
  font-weight: 800;
  color: var(--color-primary);
}
.pres-stat-danger { color: var(--color-accent); }
.pres-stat-label {
  display: block;
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 4px;
}

/* ============================================
   EXPERIMENTS
   ============================================ */
.pres-experiments {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}
.pres-exp-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--color-bg-elevated);
  border-radius: 999px;
  border: 1px solid var(--color-border);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  box-shadow: var(--shadow-soft);
  transition: transform var(--transition-fast);
}
.pres-exp-item:hover { transform: translateY(-2px); }
.pres-exp-icon { font-size: 18px; }

/* ============================================
   PROGRESS BARS
   ============================================ */
.pres-progress-row {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}
.pres-progress-item { flex: 1; min-width: 250px; }
.pres-progress-bar {
  height: 48px;
  background: rgba(0,0,0,0.06);
  border-radius: 999px;
  overflow: hidden;
  position: relative;
}
.pres-slide-dark .pres-progress-bar { background: rgba(255,255,255,0.08); }
.pres-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  border-radius: 999px;
  width: 0;
  transition: width 1.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  display: flex;
  align-items: center;
  justify-content: center;
}
.pres-progress-fill.animated { width: var(--target-width); }
.pres-progress-text {
  font-size: 16px;
  font-weight: 800;
  color: #fff;
  text-shadow: 0 1px 3px rgba(0,0,0,0.2);
}
.pres-progress-label {
  display: block;
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 8px;
  text-align: center;
}

/* ============================================
   VIDEO
   ============================================ */
.pres-video-wrapper {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #000;
  position: relative;
}
.pres-video-glow {
  box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}
.pres-video-wrapper video {
  width: 100%;
  display: block;
  aspect-ratio: 16/9;
  object-fit: cover;
}

/* ============================================
   RESULTS GRID
   ============================================ */
.pres-results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 16px;
}
@media (max-width: 640px) { .pres-results-grid { grid-template-columns: 1fr; } }
.pres-result-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  background: var(--color-bg-elevated);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  transition: transform var(--transition-fast);
}
.pres-slide-dark .pres-result-item {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.1);
}
.pres-result-item:hover { transform: translateY(-2px); }
.pres-result-icon { font-size: 22px; flex-shrink: 0; margin-top: 2px; }
.pres-result-item strong { display: block; font-size: 15px; font-weight: 700; color: #0f172a; }
.pres-slide-dark .pres-result-item strong { color: #f1f5f9; }
.pres-result-item span { font-size: 13px; color: var(--color-text-muted); }
.pres-slide-dark .pres-result-item span { color: #94a3b8; }

/* ============================================
   TEAM
   ============================================ */
.pres-team-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  margin-bottom: 48px;
}
.pres-team-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  transition: transform var(--transition-med), background var(--transition-med);
  flex: 0 0 calc((100% - 64px) / 5);
  min-width: 160px;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.pres-team-card:hover {
  transform: translateY(-4px);
  background: rgba(255,255,255,0.1);
}
.pres-team-avatar {
  width: 152px;
  height: 152px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  font-weight: 800;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 12px;
  overflow: hidden;
}
.pres-team-avatar.photo {
  background-size: cover;
  background-position: center top;
  background-repeat: no-repeat;
}
.pres-team-avatar.photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.pres-team-card h4 { font-size: 15px; font-weight: 600; color: #e2e8f0; margin: 0 0 6px; }
.pres-team-card p { font-size: 13px; color: #94a3b8; margin: 0; line-height: 1.5; margin-top: auto; }
.pres-slide-final { overflow: hidden; }

/* ============================================
   FINAL CTA
   ============================================ */
.pres-final-cta {
  text-align: center;
  padding: 48px 0;
  border-top: 1px solid rgba(255,255,255,0.08);
  margin-top: 32px;
}
.pres-final-cta h2 {
  font-size: 28px;
  font-weight: 800;
  color: #f1f5f9;
  margin-bottom: 20px;
}

/* ============================================
   FOOTER
   ============================================ */
.pres-footer {
  background: #0f172a;
  color: #64748b;
  text-align: center;
  padding: 20px;
  font-size: 13px;
}

/* ============================================
   ANIMATIONS
   ============================================ */
.animate-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.animate-in.visible {
  opacity: 1;
  transform: translateY(0);
}
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.6s; }

/* Parallax for slide numbers */
.pres-slide-number {
  transition: transform 0.3s ease-out;
}

/* Glow pulse on videos */
@keyframes glowPulse {
  0%, 100% { box-shadow: 0 20px 60px rgba(0,0,0,0.2); }
  50% { box-shadow: 0 20px 60px rgba(0,102,204,0.25); }
}
.pres-video-wrapper.visible {
  animation: glowPulse 4s ease-in-out infinite;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 640px) {
  .pres-slide { min-height: auto; padding: 80px 0 40px; }
  .pres-hero { min-height: 100vh; }
  .pres-section-title { font-size: 22px; }
  .pres-lead { font-size: 15px; }
  .pres-team-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; align-items: stretch; }
  .pres-team-card { flex: none; min-width: 0; }
}