/* ===== КОСМИЧЕСКИЙ СТИЛЬ — ХОЛОДНЫЕ ОТТЕНКИ ===== */

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

:root {
  --bg-deep: #0a0e1a;
  --bg-surface: #0f1528;
  --bg-card: #141b30;
  --accent-blue: #4fc3f7;
  --accent-cyan: #00e5ff;
  --accent-purple: #7c4dff;
  --accent-violet: #b388ff;
  --accent-frost: #e0f7fa;
  --text-primary: #e0e6f0;
  --text-secondary: #8892a8;
  --text-muted: #556078;
  --glow-blue: rgba(79, 195, 247, 0.3);
  --glow-purple: rgba(124, 77, 255, 0.3);
  --glow-cyan: rgba(0, 229, 255, 0.15);
  --gradient-hero: linear-gradient(135deg, #0a0e1a 0%, #1a1040 40%, #0d2137 100%);
  --font-display: 'Orbitron', sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--bg-deep);
  color: var(--text-primary);
  overflow-x: hidden;
  line-height: 1.6;
}

/* ===== КАНВАС ЗВЁЗДНОГО НЕБА ===== */
#starfield {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ===== НАВИГАЦИЯ ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(79, 195, 247, 0.1);
}

.nav__logo {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--accent-cyan);
  text-shadow: 0 0 20px var(--glow-cyan);
}

.nav__links {
  display: flex;
  gap: 2rem;
}

.nav__links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  transition: color 0.3s, text-shadow 0.3s;
}

.nav__links a:hover {
  color: var(--accent-blue);
  text-shadow: 0 0 12px var(--glow-blue);
}

/* ===== ГЕРОЙ ===== */
.hero {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6rem 1.5rem 3rem;
  background: var(--gradient-hero);
}

.hero__avatar {
  position: relative;
  width: 140px;
  height: 140px;
  margin-bottom: 2rem;
}

.hero__avatar-ring {
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 2px solid transparent;
  border-top-color: var(--accent-cyan);
  border-right-color: var(--accent-purple);
  animation: spinRing 4s linear infinite;
}

.hero__avatar-inner {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--bg-card), var(--bg-surface));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
  box-shadow: 0 0 40px var(--glow-purple), 0 0 80px var(--glow-blue);
}

@keyframes spinRing {
  to { transform: rotate(360deg); }
}

.hero__name {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 7vw, 5rem);
  font-weight: 900;
  letter-spacing: 0.08em;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-blue), var(--accent-violet));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.5rem;
  animation: nameGlow 3s ease-in-out infinite alternate;
}

@keyframes nameGlow {
  from { filter: drop-shadow(0 0 8px var(--glow-blue)); }
  to { filter: drop-shadow(0 0 24px var(--glow-cyan)); }
}

.hero__tagline {
  font-size: 1.1rem;
  color: var(--text-secondary);
  letter-spacing: 0.12em;
  margin-bottom: 3rem;
}

.hero__scroll-hint {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  animation: float 2.5s ease-in-out infinite;
}

.hero__scroll-arrow {
  font-size: 1rem;
  animation: bounce 1.5s ease-in-out infinite;
}

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

@keyframes bounce {
  0%, 100% { transform: translateY(0); opacity: 0.5; }
  50% { transform: translateY(6px); opacity: 1; }
}

/* ===== ОБЩЕЕ ДЛЯ СЕКЦИЙ ===== */
.section {
  position: relative;
  z-index: 1;
  padding: 6rem 1.5rem;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 4vw, 2rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-align: center;
  margin-bottom: 3rem;
  color: var(--accent-frost);
}

.section__title-icon {
  margin-right: 0.5rem;
}

/* ===== ОБО МНЕ ===== */
.about {
  background: linear-gradient(180deg, transparent 0%, rgba(20, 27, 48, 0.5) 30%, rgba(20, 27, 48, 0.5) 70%, transparent 100%);
}

.about__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.about__card {
  background: rgba(20, 27, 48, 0.6);
  border: 1px solid rgba(79, 195, 247, 0.08);
  border-radius: 16px;
  padding: 2rem 1.5rem;
  text-align: center;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.about__card:hover {
  transform: translateY(-4px);
  border-color: rgba(79, 195, 247, 0.25);
  box-shadow: 0 8px 32px rgba(79, 195, 247, 0.08);
}

.about__card-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.about__card h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.06em;
  color: var(--accent-blue);
  margin-bottom: 0.75rem;
}

.about__card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

.about__card strong {
  color: var(--accent-cyan);
}

/* ===== НАВЫКИ ===== */
.skills {
  background: linear-gradient(180deg, transparent 0%, rgba(15, 12, 35, 0.5) 30%, rgba(15, 12, 35, 0.5) 70%, transparent 100%);
}

.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.skill-card {
  background: rgba(20, 27, 48, 0.5);
  border: 1px solid rgba(124, 77, 255, 0.08);
  border-radius: 16px;
  padding: 1.8rem 1.5rem;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.skill-card:hover {
  transform: translateY(-4px);
  border-color: rgba(124, 77, 255, 0.25);
  box-shadow: 0 8px 32px rgba(124, 77, 255, 0.08);
}

.skill-card--highlight {
  border-color: rgba(0, 229, 255, 0.2);
  background: linear-gradient(135deg, rgba(20, 27, 48, 0.7), rgba(10, 20, 40, 0.8));
}

.skill-card--highlight:hover {
  border-color: rgba(0, 229, 255, 0.4);
  box-shadow: 0 8px 40px rgba(0, 229, 255, 0.12);
}

.skill-card__icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.skill-card__name {
  font-family: var(--font-display);
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  color: var(--accent-violet);
  margin-bottom: 0.4rem;
}

.skill-card--highlight .skill-card__name {
  color: var(--accent-cyan);
}

.skill-card__desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  line-height: 1.5;
}

.skill-bar {
  height: 6px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 0.4rem;
}

.skill-bar__fill {
  height: 100%;
  width: var(--fill);
  border-radius: 3px;
  background: linear-gradient(90deg, var(--accent-purple), var(--accent-blue));
  animation: barFill 1.5s ease-out forwards;
  transform-origin: left;
}

.skill-card--highlight .skill-bar__fill {
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
}

@keyframes barFill {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

.skill-bar__label {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: var(--font-display);
  letter-spacing: 0.05em;
}

/* ===== 3D СТРАСТЬ ===== */
.passion {
  background: linear-gradient(180deg, transparent 0%, rgba(20, 27, 48, 0.4) 30%, rgba(20, 27, 48, 0.4) 70%, transparent 100%);
}

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

.passion__text p {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 1.2rem;
  line-height: 1.8;
}

.passion__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.5rem;
}

.tag {
  padding: 0.4rem 1rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  border: 1px solid rgba(79, 195, 247, 0.2);
  color: var(--accent-blue);
  background: rgba(79, 195, 247, 0.05);
  transition: background 0.3s, border-color 0.3s;
}

.tag:hover {
  background: rgba(79, 195, 247, 0.12);
  border-color: var(--accent-blue);
}

.passion__3d-scene {
  display: flex;
  align-items: center;
  justify-content: center;
}

#cube3d {
  width: 100%;
  max-width: 360px;
  aspect-ratio: 1;
  border-radius: 20px;
  background: radial-gradient(ellipse at center, rgba(20, 27, 48, 0.8), rgba(10, 14, 26, 0.9));
  border: 1px solid rgba(79, 195, 247, 0.1);
}

/* ===== ФУТЕР ===== */
.footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 3rem 1.5rem 2rem;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.footer__stars {
  font-size: 1.2rem;
  color: var(--accent-purple);
  letter-spacing: 0.5em;
  margin-bottom: 1rem;
  opacity: 0.5;
}

/* ===== АДАПТИВНОСТЬ ===== */
@media (max-width: 768px) {
  .nav {
    padding: 0.8rem 1rem;
  }

  .nav__links {
    gap: 1rem;
  }

  .nav__links a {
    font-size: 0.75rem;
  }

  .passion__content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .passion__3d-scene {
    order: -1;
  }

  #cube3d {
    max-width: 280px;
  }

  .section {
    padding: 4rem 1rem;
  }
}

@media (max-width: 480px) {
  .nav__links {
    gap: 0.6rem;
  }

  .nav__logo {
    font-size: 0.8rem;
  }

  .hero__avatar {
    width: 110px;
    height: 110px;
  }

  .hero__avatar-inner {
    width: 110px;
    height: 110px;
    font-size: 2.5rem;
  }
}

/* ===== СКРОЛЛ-АНИМАЦИИ ===== */
.about__card,
.skill-card {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease, border-color 0.3s, box-shadow 0.3s;
}

.about__card.visible,
.skill-card.visible {
  opacity: 1;
  transform: translateY(0);
}