/* ===== Reset & Base ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-primary: #0a0a1a;
  --bg-secondary: #111128;
  --bg-card: #1a1a3e;
  --text-primary: #f0f0ff;
  --text-secondary: #a0a0c0;
  --accent: #6c5ce7;
  --accent-glow: #a78bfa;
  --accent-secondary: #4ecdc4;
  --gradient-1: linear-gradient(135deg, #6c5ce7 0%, #a78bfa 100%);
  --gradient-2: linear-gradient(135deg, #4ecdc4 0%, #44a8b3 100%);
  --border-color: rgba(108, 92, 231, 0.2);
  --font-display: 'Orbitron', sans-serif;
  --font-body: 'Inter', 'Noto Sans KR', sans-serif;
}

html {
  scroll-behavior: smooth;
}

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

a {
  color: inherit;
  text-decoration: none;
}

/* ===== Navigation ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 1rem 0;
  transition: background 0.3s, padding 0.3s, box-shadow 0.3s;
}

.navbar.scrolled {
  background: rgba(10, 10, 26, 0.95);
  backdrop-filter: blur(20px);
  padding: 0.6rem 0;
  box-shadow: 0 2px 30px rgba(108, 92, 231, 0.15);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 2px;
}

.logo-img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  object-fit: cover;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2.5rem;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: color 0.3s;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-1);
  transition: width 0.3s;
}

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

.nav-links a:hover::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: transform 0.3s, opacity 0.3s;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

#particleCanvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 2rem;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 7vw, 5rem);
  font-weight: 900;
  letter-spacing: 4px;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, #fff 0%, #a78bfa 50%, #4ecdc4 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  display: block;
  font-size: clamp(0.8rem, 2vw, 1rem);
  font-weight: 400;
  letter-spacing: 8px;
  color: var(--accent-glow);
  -webkit-text-fill-color: var(--accent-glow);
  margin-bottom: 0.5rem;
}

.hero-desc {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto 2.5rem;
}

.btn {
  display: inline-block;
  padding: 0.9rem 2.5rem;
  border-radius: 50px;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  transition: transform 0.3s, box-shadow 0.3s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--gradient-1);
  color: white;
  box-shadow: 0 4px 25px rgba(108, 92, 231, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 35px rgba(108, 92, 231, 0.6);
}

.hero-scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.75rem;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.scroll-arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid var(--accent-glow);
  border-bottom: 2px solid var(--accent-glow);
  transform: rotate(45deg);
  animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: rotate(45deg) translate(0, 0); opacity: 1; }
  50% { transform: rotate(45deg) translate(5px, 5px); opacity: 0.5; }
}

/* ===== Sections ===== */
.section {
  padding: 6rem 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 900;
  text-align: center;
  margin-bottom: 0.8rem;
  letter-spacing: 3px;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 3.5rem;
}

/* ===== About ===== */
.about {
  background: var(--bg-secondary);
}

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

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 1.2rem;
  font-size: 1.05rem;
  line-height: 1.8;
}

.stats-row {
  display: flex;
  gap: 2.5rem;
  margin-top: 2rem;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--accent-glow);
}

.stat-suffix {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent-glow);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-top: 0.2rem;
}

/* Code block */
.code-block {
  background: #0d0d2b;
  border-radius: 16px;
  border: 1px solid var(--border-color);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.code-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.2rem;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--border-color);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.code-tabs {
  display: flex;
  gap: 0.3rem;
  margin-left: auto;
}

.code-tab {
  background: transparent;
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 0.25rem 0.7rem;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.75rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
}

.code-tab:hover {
  color: var(--text-primary);
}

.code-tab.active {
  background: rgba(108, 92, 231, 0.2);
  border-color: rgba(108, 92, 231, 0.4);
  color: var(--accent-glow);
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27c93f; }

.code-block pre {
  padding: 1.5rem;
  font-size: 0.85rem;
  line-height: 1.8;
  overflow-x: auto;
}

.code-block code {
  font-family: 'SF Mono', 'Fira Code', monospace;
  color: #c0c0e0;
}

.code-block .kw { color: #c792ea; }
.code-block .fn { color: #82aaff; }
.code-block .cls { color: #ffcb6b; }
.code-block .str { color: #c3e88d; }
.code-block .num { color: #f78c6c; }

/* ===== Games ===== */
.games-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  max-width: 800px;
  margin: 0 auto;
}

.game-card {
  background: var(--bg-card);
  border-radius: 20px;
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
}

.game-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 50px rgba(108, 92, 231, 0.2);
}

.game-thumbnail {
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-card) 100%);
  position: relative;
  overflow: hidden;
}

.game-thumbnail::before {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: var(--accent, #6c5ce7);
  opacity: 0.08;
  top: -100px;
  right: -100px;
}

.game-thumb-img {
  width: 80px;
  height: 80px;
  border-radius: 18px;
  object-fit: cover;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.game-info {
  padding: 1.5rem;
}

.game-info h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 0.6rem;
}

.game-info p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 1rem;
}

.game-tags {
  display: flex;
  gap: 0.5rem;
}

.tag {
  padding: 0.3rem 0.8rem;
  background: rgba(108, 92, 231, 0.15);
  border: 1px solid rgba(108, 92, 231, 0.3);
  border-radius: 20px;
  font-size: 0.75rem;
  color: var(--accent-glow);
  letter-spacing: 0.5px;
}

/* ===== Contact ===== */
.contact {
  background: var(--bg-secondary);
}

.contact-form-wrapper {
  max-width: 600px;
  margin: 0 auto;
  background: var(--bg-card);
  border-radius: 20px;
  border: 1px solid var(--border-color);
  padding: 2.5rem;
}

.contact-form .form-group {
  margin-bottom: 1.5rem;
}

.contact-form label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.8rem 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.2);
}

.contact-form textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-form .btn-submit {
  width: 100%;
  padding: 0.9rem 2rem;
  background: var(--gradient-1);
  color: white;
  border: none;
  border-radius: 50px;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  cursor: pointer;
  transition: transform 0.3s, box-shadow 0.3s;
  box-shadow: 0 4px 25px rgba(108, 92, 231, 0.4);
}

.contact-form .btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 35px rgba(108, 92, 231, 0.6);
}

/* ===== Footer ===== */
.footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border-color);
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 2px;
}

.footer-copy {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* ===== Animations ===== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .stats-row {
    justify-content: center;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: rgba(10, 10, 26, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 1.5rem 2rem;
    gap: 1.2rem;
    border-bottom: 1px solid var(--border-color);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

  .footer-content {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  .games-grid {
    grid-template-columns: 1fr;
  }
}