/* ==== ПАЛИТРА: холодная (индиго/сталь/лёд) ==== */
:root {
  --brand: #3b4f8a;
  --brand-2: #2d3e6b;
  --accent: #5fb3d9;
  --bg: #0f1419;
  --grad: linear-gradient(135deg, #1a2332 0%, #0f1419 100%);
  --glow: rgba(95, 179, 217, 0.4);
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  background-image: var(--grad);
  color: var(--text);
  font-family: 'Segoe UI', system-ui, -apple-system, Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ==== ШАПКА ==== */
.site-head {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 20, 25, 0.7);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(95, 179, 217, 0.15);
  padding: 0.75rem 0;
}

.head-in {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--accent);
  letter-spacing: -0.02em;
}

.brand-mark {
  display: block;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand), var(--accent));
  box-shadow: 0 0 20px var(--glow);
  position: relative;
}

.brand-mark::before {
  content: '';
  position: absolute;
  inset: 6px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.brand-txt {
  color: #fff;
  font-family: 'Courier New', 'Consolas', monospace;
  letter-spacing: 0.05em;
}

.brand-txt.small {
  font-size: 1rem;
}

.brand-run {
  color: var(--accent);
}

.nav {
  display: flex;
  gap: 1.5rem;
  margin-left: auto;
}

.nav a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 200ms var(--ease-out);
}

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

.btn-play-top {
  white-space: nowrap;
}

/* ==== КНОПКИ ==== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-pill);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 200ms var(--ease-out);
  background: linear-gradient(135deg, var(--brand), var(--accent));
  color: #fff;
  box-shadow: 0 4px 16px rgba(95, 179, 217, 0.3), 0 1px 3px rgba(0, 0, 0, 0.2);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(95, 179, 217, 0.5), 0 2px 6px rgba(0, 0, 0, 0.3);
}

.btn:active {
  transform: translateY(0);
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 1.1rem;
}

.btn-ghost {
  background: rgba(95, 179, 217, 0.1);
  border: 1px solid rgba(95, 179, 217, 0.3);
  box-shadow: none;
}

.btn-ghost:hover {
  background: rgba(95, 179, 217, 0.2);
  border-color: var(--accent);
}

/* ==== HERO ==== */
.hero {
  position: relative;
  padding: 5rem 0 6rem;
  overflow: hidden;
}

.mesh {
  position: absolute;
  inset: 0;
  opacity: 0.7;
  pointer-events: none;
  background: 
    radial-gradient(circle at 20% 30%, rgba(59, 79, 138, 0.3) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(95, 179, 217, 0.2) 0%, transparent 50%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  font-family: 'Courier New', 'Consolas', monospace;
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 1rem;
  letter-spacing: 0.02em;
}

h1 {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.1;
  color: #fff;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.lead {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.cluster {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.hero-cta {
  margin-bottom: 2.5rem;
}

.hero-stats {
  display: flex;
  gap: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(95, 179, 217, 0.2);
}

.hero-stats > div {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.hero-stats b {
  font-family: 'Courier New', 'Consolas', monospace;
  font-size: 1.8rem;
  color: var(--accent);
  line-height: 1;
}

.hero-stats span {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ВИЗУАЛ ГЕРОЯ */
.hero-visual {
  perspective: 1000px;
}

.screen {
  background: rgba(20, 30, 45, 0.9);
  border-radius: 24px;
  border: 1px solid rgba(95, 179, 217, 0.3);
  overflow: hidden;
  box-shadow: 
    0 20px 60px rgba(0, 0, 0, 0.5),
    0 0 40px rgba(95, 179, 217, 0.2);
  transform: rotateY(-5deg) rotateX(2deg);
  transition: transform 600ms var(--ease-out);
}

.screen:hover {
  transform: rotateY(0deg) rotateX(0deg);
}

.screen-bar {
  background: rgba(59, 79, 138, 0.5);
  padding: 0.6rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 1px solid rgba(95, 179, 217, 0.2);
}

.screen-bar i {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
}

.screen-label {
  margin-left: auto;
  font-size: 0.8rem;
  font-family: 'Courier New', monospace;
  color: rgba(255, 255, 255, 0.6);
}

.screen-body {
  position: relative;
  background: linear-gradient(180deg, #1a2a3f 0%, #0f1826 100%);
  height: 300px;
  overflow: hidden;
}

.s-cloud {
  position: absolute;
  width: 60px;
  height: 30px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 15px;
  animation: float 4s ease-in-out infinite;
}

.s-cloud.c1 {
  top: 20%;
  left: 10%;
  animation-delay: 0s;
}

.s-cloud.c2 {
  top: 15%;
  right: 15%;
  animation-delay: 1.5s;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.s-coin {
  position: absolute;
  top: 30%;
  width: 20px;
  height: 20px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--glow);
  animation: spin 3s linear infinite;
}

.s-coin.k1 { left: 25%; animation-delay: 0s; }
.s-coin.k2 { left: 45%; top: 25%; animation-delay: 0.5s; }
.s-coin.k3 { left: 65%; top: 28%; animation-delay: 1s; }

@keyframes spin {
  0%, 100% { transform: rotateY(0deg); }
  50% { transform: rotateY(180deg); }
}

.hero-bot {
  position: absolute;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%);
  animation: bounce 1s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(-8px); }
}

.bot-ant {
  display: block;
  width: 3px;
  height: 12px;
  background: var(--accent);
  margin: 0 auto 2px;
  border-radius: 2px;
}

.bot-body {
  display: block;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--brand), var(--accent));
  border-radius: 50%;
  border: 3px solid rgba(255, 255, 255, 0.3);
  position: relative;
  box-shadow: 0 4px 16px var(--glow);
}

.bot-eye {
  position: absolute;
  top: 14px;
  width: 8px;
  height: 8px;
  background: #fff;
  border-radius: 50%;
}

.bot-eye.l { left: 12px; }
.bot-eye.r { right: 12px; }

.bot-mouth {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 2px;
  background: #fff;
  border-radius: 1px;
}

.s-ground {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: rgba(59, 79, 138, 0.4);
  border-top: 2px solid var(--accent);
}

.s-block {
  position: absolute;
  bottom: 100px;
  width: 50px;
  height: 50px;
  background: rgba(95, 179, 217, 0.3);
  border: 2px solid var(--accent);
  border-radius: 8px;
}

.s-block.b1 { left: 20%; }
.s-block.b2 { right: 20%; }

/* ==== СЕКЦИИ ==== */
.section {
  padding: 5rem 0;
  position: relative;
}

.sec-head {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3rem;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  color: #fff;
  margin-bottom: 1rem;
}

h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.75rem;
}

/* ==== GAME ==== */
.play-sec {
  background: rgba(20, 30, 45, 0.3);
  border-top: 1px solid rgba(95, 179, 217, 0.2);
  border-bottom: 1px solid rgba(95, 179, 217, 0.2);
}

.stage {
  max-width: 950px;
  margin: 0 auto;
}

.hud {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  padding: 1.5rem;
  background: rgba(15, 20, 25, 0.8);
  border-radius: 24px 24px 0 0;
  border: 1px solid rgba(95, 179, 217, 0.3);
  border-bottom: none;
}

.hud-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}

.hud-item span {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.6);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hud-item b {
  font-family: 'Courier New', 'Consolas', monospace;
  font-size: 1.5rem;
  color: var(--accent);
}

.canvas-wrap {
  position: relative;
  background: #000;
  border-radius: 0 0 24px 24px;
  border: 1px solid rgba(95, 179, 217, 0.3);
  border-top: none;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

#game-canvas {
  display: block;
  width: 100%;
  height: auto;
  max-height: 480px;
}

.overlay {
  position: absolute;
  inset: 0;
  background: rgba(15, 20, 25, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 300ms;
}

.overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.ov-card {
  text-align: center;
  max-width: 400px;
  padding: 2rem;
}

.ov-card h3 {
  font-family: 'Courier New', monospace;
  color: var(--accent);
  font-size: 2rem;
  margin-bottom: 1rem;
}

.ov-card p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 2rem;
}

.touch {
  display: none;
  padding: 1.5rem;
  gap: 1rem;
  justify-content: space-between;
  background: rgba(15, 20, 25, 0.9);
  border-top: 1px solid rgba(95, 179, 217, 0.2);
}

.touch-move {
  display: flex;
  gap: 0.75rem;
}

.tbtn {
  background: rgba(59, 79, 138, 0.6);
  border: 1px solid rgba(95, 179, 217, 0.4);
  color: #fff;
  font-size: 1.2rem;
  font-weight: 700;
  padding: 1rem 1.5rem;
  border-radius: 16px;
  cursor: pointer;
  transition: all 150ms;
  -webkit-tap-highlight-color: transparent;
}

.tbtn:active {
  background: rgba(95, 179, 217, 0.5);
  transform: scale(0.95);
}

.tbtn-jump {
  padding: 1rem 2rem;
}

@media (max-width: 768px) {
  .touch {
    display: flex;
  }
}

/* ==== HOW TO ==== */
.bento {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.card {
  background: rgba(20, 30, 45, 0.6);
  border: 1px solid rgba(95, 179, 217, 0.3);
  border-radius: 24px;
  padding: 2rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  transition: all 300ms var(--ease-out);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5), 0 0 24px var(--glow);
  border-color: var(--accent);
}

.feat-ic {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--brand), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 1.25rem;
  box-shadow: 0 0 20px var(--glow);
}

kbd {
  display: inline-block;
  padding: 0.2em 0.5em;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 6px;
  font-family: 'Courier New', monospace;
  font-size: 0.9em;
  color: var(--accent);
}

/* ==== LEADERBOARD ==== */
.board-sec {
  position: relative;
  overflow: hidden;
}

.mesh-2 {
  position: absolute;
  inset: 0;
  opacity: 0.5;
  background: 
    radial-gradient(circle at 30% 50%, rgba(95, 179, 217, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 70% 50%, rgba(59, 79, 138, 0.2) 0%, transparent 50%);
}

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

.board {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.board-row {
  display: grid;
  grid-template-columns: 40px 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1rem 1.5rem;
  background: rgba(20, 30, 45, 0.5);
  border: 1px solid rgba(95, 179, 217, 0.2);
  border-radius: 16px;
  transition: all 200ms;
}

.board-row:hover {
  background: rgba(20, 30, 45, 0.8);
  border-color: var(--accent);
  transform: translateX(4px);
}

.board-row.top3 {
  background: rgba(59, 79, 138, 0.3);
  border-color: var(--accent);
}

.rank {
  font-family: 'Courier New', monospace;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent);
  text-align: center;
}

.pname {
  color: #fff;
  font-weight: 600;
}

.pscore {
  font-family: 'Courier New', monospace;
  font-size: 1.1rem;
  color: var(--accent);
  font-weight: 700;
}

.submit-card {
  position: sticky;
  top: 6rem;
}

.ok-note {
  background: rgba(95, 179, 217, 0.2);
  border: 1px solid var(--accent);
  color: #fff;
  padding: 1rem;
  border-radius: 12px;
  margin-bottom: 1rem;
}

.score-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.score-form label {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.9);
}

.score-form input {
  padding: 0.85rem 1rem;
  border-radius: 12px;
  border: 1px solid rgba(95, 179, 217, 0.3);
  background: rgba(15, 20, 25, 0.6);
  color: #fff;
  font-size: 1rem;
  transition: border-color 200ms;
}

.score-form input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(95, 179, 217, 0.2);
}

.score-form input[readonly] {
  cursor: not-allowed;
  opacity: 0.7;
}

/* ==== CTA ==== */
.cta-sec {
  background: rgba(59, 79, 138, 0.2);
  border-top: 1px solid rgba(95, 179, 217, 0.3);
  border-bottom: 1px solid rgba(95, 179, 217, 0.3);
}

.cta-in {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

/* ==== FOOTER ==== */
.site-foot {
  padding: 3rem 0;
  border-top: 1px solid rgba(95, 179, 217, 0.2);
}

.foot-in {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}

.muted {
  color: rgba(255, 255, 255, 0.6);
}

.small {
  font-size: 0.9rem;
}

/* ==== АНИМАЦИИ ПОЯВЛЕНИЯ ==== */
html.js .reveal {
  opacity: 0;
  transform: translateY(30px);
}

html.js .reveal.in {
  opacity: 1;
  transform: translateY(0);
  transition: all 700ms var(--ease-out);
}

/* ==== АДАПТИВ ==== */
@media (max-width: 900px) {
  .hero-grid,
  .board-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .nav {
    display: none;
  }

  .btn-play-top {
    margin-left: auto;
  }
}

@media (max-width: 600px) {
  h1 {
    font-size: 2rem;
  }

  .hero {
    padding: 3rem 0 4rem;
  }

  .section {
    padding: 3rem 0;
  }

  .hud {
    flex-wrap: wrap;
    gap: 1rem;
  }

  .foot-in {
    flex-direction: column;
    text-align: center;
  }
}