:root {
  --color-bg-dark: #5c86a2;
  --color-bg-light: #3d5e7c;
  --color-accent: #f7c645;
  --color-primary-text: #f5fafd;
  --color-secondary-text: #eaf4fc;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: 'Inter', sans-serif;
  color: var(--color-primary-text);
  background-color: var(--color-bg-dark);
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  line-height: 1.6;
}
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 200%;
  height: 200%;
  background-image: url("data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMTIwIiBoZWlnaHQ9IjEyMCIgdmlld0JveD0iMCAwIDEyMCAxMjAiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyI+PHBhdGggZD0iTTAgMzAgUSAzMCAwIDYwIDMwIFQgMTIwIDMwIiBzdHJva2U9IiUyM2ZmZmZmZiIgc3Ryb2tlLXdpZHRoPSIxIiBmaWxsPSJub25lIi8+PHBhdGggZD0iTTAgNjAgUSAzMCAzMCA2MCA2MCBUIDEyMCA2MCIgc3Ryb2tlPSIlMjNmZmZmZmYiIHN0cm9rZS13aWR0aD0iMSIgZmlsbD0ibm9uZSIvPjxwYXRoIGQ9Ik0wIDkwIFEgMzAgNjAgNjAgOTAgVCAxMjAgOTAiIHN0cm9rZT0iJTIzZmZmZmZmIiBzdHJva2Utd2lkdGg9IjEiIGZpbGw9Im5vbmUiLz48L3N2Zz4=");
  background-size: 50% 50%;
  background-repeat: repeat;
  opacity: 0.15;
  animation: moveWaves 60s linear infinite;
  z-index: -1;
}
@keyframes moveWaves {
  0% { transform: translateX(0) translateY(0); }
  50% { transform: translateX(-25%) translateY(-25%); }
  100% { transform: translateX(-50%) translateY(-50%); }
}
body::after {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(255, 255, 255, 0.15) 0%, rgba(255, 255, 255, 0) 300px), linear-gradient(120deg, var(--color-bg-dark) 0%, var(--color-bg-light) 100%);
  animation: gradientShift 20s alternate infinite, breathe 30s ease-in-out infinite;
  filter: brightness(1);
  z-index: -2;
  pointer-events: none;
}
@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  100% { background-position: 100% 50%; }
}
@keyframes breathe {
  0%, 100% { filter: brightness(1); }
  50% { filter: brightness(1.05); }
}
.progress-bar {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  overflow: hidden;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1000;
}
.progress-bar__fill {
  width: 10%;
  height: 100%;
  background-color: var(--color-accent);
  border-radius: 3px;
  transition: width 0.5s ease;
}
.container {
  max-width: 700px;
  padding: 0 16px;
  margin: 24px auto 0;
  padding-bottom: 50px;
}
h1 {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: #ffffff;
}
h2 {
  font-size: 1.5rem;
  margin-top: 2rem;
  margin-bottom: 0.5rem;
  color: #ffffff;
}
p, li {
  font-size: 1rem;
  margin-bottom: 1rem;
  color: var(--color-secondary-text);
}
.video-wrapper{position:relative;width:100%;margin-bottom:1.5rem;border-radius:12px;overflow:hidden;box-shadow:0 8px 20px rgba(0,0,0,.3)}
.cinema-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.6);
  z-index: 9998;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s ease;
  display: grid;
  place-items: center;
}
.cinema-overlay.active {
  opacity: 1;
  pointer-events: auto;
}
.no-scroll { overflow: hidden; }
.cinema-overlay .video-wrapper {
  position: relative !important;
  left: auto; top: auto;
  transform: none;
  width: min(80vw, 1100px);
  background: #000;
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0,0,0,.5);
  margin: 0 !important;
  overflow: hidden;
}
.cinema-overlay .video-wrapper .vjs-tech,
.cinema-overlay .video-wrapper video {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.cinema-overlay .video-wrapper .vjs-control-bar {
  background: rgba(0,0,0,.35);
  backdrop-filter: blur(4px);
}
.vjs-expand-toggle.vjs-control {
  font-size: 2.5em !important;
  width: 1.5em !important;
  height: 1.2em !important;
  line-height: 1em !important;
  cursor: pointer !important;
  opacity: 1 !important;
  pointer-events: auto !important;
}
.vjs-expand-toggle.vjs-control .vjs-icon-placeholder:before {
  display: flex;
  align-items: center;
  justify-content: center;
}
@media (max-width: 600px) {
  .cinema-overlay .video-wrapper { border-radius: 10px; }
}
.vjs-theme-memorize .vjs-control-bar{background:linear-gradient(90deg, #2596be, #5c86a2)}
.vjs-theme-memorize .vjs-big-play-button{
  background:#2596be;border:none;border-radius:50%;width:72px;height:72px;
  line-height:72px;font-size:1.2rem;box-shadow:0 6px 18px rgba(0,0,0,.25)
}
.fade-in-section {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
  will-change: opacity, transform;
}
.fade-in-section.in-view {
  opacity: 1;
  transform: translateY(0);
}
.tooltip { position: relative; display: inline-block; cursor: pointer; margin-left: 6px; }
.tooltip .tooltip-content {
  visibility: hidden;
  opacity: 0;
  width: 220px;
  background-color: var(--color-bg-light);
  color: var(--color-primary-text);
  text-align: left;
  border-radius: 8px;
  padding: 10px;
  position: absolute;
  z-index: 10;
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%);
  transition: opacity 0.3s;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}
.tooltip .tooltip-content::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border-width: 6px;
  border-style: solid;
  border-color: var(--color-bg-light) transparent transparent transparent;
}
.tooltip:hover .tooltip-content { visibility: visible; opacity: 1; }
.floating-robot {
  position: fixed;
  bottom: 16px;
  right: 16px;
  width: 150px;
  height: auto;
  z-index: 1;
  pointer-events: none;
  animation: floaty 7s ease-in-out infinite;
}
@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}
.speech-bubble {
  position: absolute;
  bottom: 100%;
  right: 0;
  background-color: var(--color-bg-light);
  color: var(--color-primary-text);
  padding: 8px 12px;
  border-radius: 8px;
  max-width: 220px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.4s, transform 0.4s;
  pointer-events: none;
}
.speech-bubble::after {
  content: "";
  position: absolute;
  top: 100%;
  right: 16px;
  border-width: 6px;
  border-style: solid;
  border-color: var(--color-bg-light) transparent transparent transparent;
}
.speech-bubble.show { opacity: 1; transform: translateY(0); }
.floating-robot video,
.floating-robot .robot-fallback {
  width: 100%;
  height: auto;
  display: block;
}
.interesting-fact {
  margin-top: 24px;
  background-color: rgba(255, 255, 255, 0.1);
  padding: 12px 16px;
  border-radius: 8px;
  color: var(--color-primary-text);
  overflow: hidden;
  max-height: 48px;
  transition: max-height 0.5s ease, padding 0.5s ease;
}
.interesting-fact.open {
  max-height: 500px;
  padding: 16px 16px;
}
.interesting-fact .fact-header {
  display: flex;
  align-items: center;
  font-weight: 600;
}
.interesting-fact .fact-header .icon {
  margin-right: 8px;
  font-size: 1.2rem;
}
.interesting-fact .fact-content {
  margin-top: 8px;
  opacity: 0;
  transition: opacity 0.5s ease;
}
.interesting-fact.open .fact-content { opacity: 1; }
.finish-btn {
  display: block;
  width: 100%;
  margin: 32px auto 0;
  padding: 14px 0;
  background-color: var(--color-accent);
  color: var(--color-bg-dark);
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  transition: background-color 0.3s, transform 0.2s;
}
.finish-btn:hover { background-color: #ffd866; transform: translateY(-2px); }
.finish-btn:active { transform: translateY(0); }
.deep-wave {
  position: fixed;
  top: 0;
  left: 0;
  width: 400%;
  height: 400%;
  background-image: url("data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMTIwIiBoZWlnaHQ9IjEyMCIgdmlld0JveD0iMCAwIDEyMCAxMjAiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyI+PHBhdGggZD0iTTAgMzAgUSAzMCAwIDYwIDMwIFQgMTIwIDMwIiBzdHJva2U9IiUyM2ZmZmZmZiIgc3Ryb2tlLXdpZHRoPSIxIiBmaWxsPSJub25lIi8+PHBhdGggZD0iTTAgNjAgUSAzMCAzMCA2MCA2MCBUIDEyMCA2MCIgc3Ryb2tlPSIlMjNmZmZmZmYiIHN0cm9rZS13aWR0aD0iMSIgZmlsbD0ibm9uZSIvPjxwYXRoIGQ9Ik0wIDkwIFEgMzAgNjAgNjAgOTAgVCAxMjAgOTAiIHN0cm9rZT0iJTIzZmZmZmZmIiBzdHJva2Utd2lkdGg9IjEiIGZpbGw9Im5vbmUiLz48L3N2Zz4=");
  background-size: 60% 60%;
  background-repeat: repeat;
  opacity: 0.04;
  animation: moveDeepWave 120s linear infinite;
  z-index: -4;
  pointer-events: none;
}
@keyframes moveDeepWave {
  0% { transform: translate(0, 0); }
  50% { transform: translate(-20%, -20%); }
  100% { transform: translate(-40%, -40%); }
}
@media (max-width: 600px) {
  h1 { font-size: 1.3rem; line-height: 1.3; }
  h2 { font-size: 1.2rem; }
  .floating-robot { width: 70px; }
  .speech-bubble { max-width: 160px; font-size: 0.8rem; padding: 6px 10px; }
}