@layer base, components, utilities;

@layer base {
  :root {
    --neon-pink: oklch(70% 0.3 350);
    --neon-blue: oklch(75% 0.3 250);
    --neon-yellow: oklch(85% 0.2 85);
    --bg-dark: oklch(10% 0.02 250);
    --surface-dark: oklch(18% 0.03 250);
    --text-white: oklch(98% 0.01 250);
    
    font-family: 'Pretendard', system-ui, -apple-system, sans-serif;
    color-scheme: dark;
  }

  body {
    margin: 0;
    min-height: 100dvh;
    background-color: var(--bg-dark);
    background-image: 
      radial-gradient(circle at 10% 10%, oklch(from var(--neon-pink) l c h / 0.15), transparent 40%),
      radial-gradient(circle at 90% 90%, oklch(from var(--neon-blue) l c h / 0.15), transparent 40%),
      url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.7'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.08'/%3E%3C/svg%3E");
    color: var(--text-white);
    display: flex;
    justify-content: center;
    padding: 3rem 1rem;
    overflow-x: hidden;
  }
}

@layer components {
  .app-container {
    width: min(100%, 800px);
    display: flex;
    flex-direction: column;
    gap: 3rem;
  }

  /* 헤더 섹션 */
  .dopamine-header {
    text-align: center;
    position: relative;
  }

  .logo-area {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
  }

  .bolt {
    font-size: 3.5rem;
    color: var(--neon-yellow);
    filter: drop-shadow(0 0 15px var(--neon-yellow));
    animation: flicker 2s infinite;
  }

  h1 {
    font-size: 4rem;
    font-weight: 950;
    margin: 0;
    letter-spacing: -0.06em;
    text-transform: uppercase;
    background: linear-gradient(to bottom, var(--text-white), oklch(from var(--text-white) l c h / 0.6));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  h1 span {
    color: var(--neon-pink);
    -webkit-text-fill-color: var(--neon-pink);
    filter: drop-shadow(0 0 20px var(--neon-pink));
  }

  .tagline {
    font-size: 1.25rem;
    opacity: 0.6;
    letter-spacing: -0.02em;
  }

  /* 스테이션 네비게이션 */
  .station-nav {
    display: flex;
    background: var(--surface-dark);
    padding: 0.5rem;
    border-radius: 100px;
    border: 1px solid oklch(100% 0 0 / 0.1);
    box-shadow: inset 0 2px 10px oklch(0% 0 0 / 0.5);
  }

  .nav-item {
    flex: 1;
    text-align: center;
    padding: 1rem;
    border-radius: 100px;
    font-weight: 800;
    cursor: pointer;
    transition: all 0.3s ease;
    opacity: 0.5;
  }

  .nav-item.active {
    background: linear-gradient(135deg, var(--neon-pink), var(--neon-blue));
    color: white;
    opacity: 1;
    box-shadow: 0 0 20px oklch(from var(--neon-pink) l c h / 0.4);
  }

  /* 푸터 스테이터스 */
  .station-footer {
    text-align: center;
    margin-top: 2rem;
    opacity: 0.4;
  }

  .battery-status {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    font-weight: 900;
    font-size: 0.8rem;
    color: var(--neon-yellow);
  }

  .battery-bar {
    width: 100px;
    height: 14px;
    background: oklch(100% 0 0 / 0.1);
    border: 1px solid var(--neon-yellow);
    padding: 2px;
    position: relative;
  }

  .battery-bar::after {
    content: '';
    display: block;
    height: 100%;
    width: 85%;
    background: var(--neon-yellow);
    box-shadow: 0 0 10px var(--neon-yellow);
    animation: charging 2s infinite alternate;
  }

  @keyframes flicker {
    0%, 18%, 22%, 25%, 53%, 57%, 100% { opacity: 1; }
    20%, 24%, 55% { opacity: 0.4; }
  }

  @keyframes charging {
    from { opacity: 0.6; transform: scaleX(0.95); }
    to { opacity: 1; transform: scaleX(1); }
  }
}