@layer reset, base, components, utilities;

@layer reset {
  *, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
}

@layer base {
  :root {
    /* Neon & Dark Pulse Palette - OKLCH */
    --primary: oklch(0.65 0.25 280); /* Electric Blue */
    --accent: oklch(0.7 0.3 320); /* Neon Pink */
    --success: oklch(0.8 0.2 150); /* Matrix Green */
    
    --bg-dark: oklch(0.12 0.02 280);
    --bg-surface: oklch(0.18 0.04 280 / 0.7);
    --text-main: oklch(0.98 0.01 280);
    --text-dim: oklch(0.6 0.05 280);
    
    --glass: blur(16px);
    --border-glass: 1px solid oklch(1 0 0 / 0.1);
    
    --shadow-neon: 0 0 20px -5px var(--primary);
    --radius-lg: 24px;
    --radius-md: 16px;
    
    font-family: 'Noto Sans KR', 'Plus Jakarta Sans', system-ui, sans-serif;
    color: var(--text-main);
    background-color: var(--bg-dark);
    line-height: 1.6;
    letter-spacing: -0.02em;
  }

  body {
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    padding: 1rem;
    background: 
      radial-gradient(circle at top left, oklch(0.3 0.1 280 / 0.5), transparent 40%),
      radial-gradient(circle at bottom right, oklch(0.3 0.1 320 / 0.3), transparent 40%),
      var(--bg-dark);
    background-attachment: fixed;
  }
}

@layer components {
  .card {
    background: var(--bg-surface);
    backdrop-filter: var(--glass);
    -webkit-backdrop-filter: var(--glass);
    border: var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .btn {
    padding: 0.75rem 1.5rem;
    border-radius: 100px;
    font-weight: 700;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
  }

  .btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: var(--shadow-neon);
  }

  .btn-primary:hover:not(:disabled) {
    transform: scale(1.05);
    filter: brightness(1.2);
    box-shadow: 0 0 30px -5px var(--primary);
  }

  .btn-primary:disabled {
    background: var(--text-dim);
    opacity: 0.5;
    cursor: not-allowed;
  }

  .input-field {
    background: oklch(0 0 0 / 0.3);
    border: var(--border-glass);
    color: var(--text-main);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    font-family: inherit;
    width: 100%;
    outline: none;
    transition: border-color 0.2s;
  }

  .input-field:focus {
    border-color: var(--primary);
  }

  .tag {
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.3rem 0.8rem;
    border-radius: 100px;
    background: oklch(1 0 0 / 0.05);
    color: var(--text-dim);
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.2s;
  }

  .tag.active {
    background: var(--primary);
    color: white;
    box-shadow: 0 0 10px -2px var(--primary);
  }
}

@layer utilities {
  @keyframes slideIn {
    from { opacity: 0; transform: translateY(30px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
  }

  .animate-entry {
    animation: slideIn 0.5s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
  }

  .char-count {
    font-size: 0.75rem;
    font-weight: 800;
    font-variant-numeric: tabular-nums;
  }
}

/* Custom scrollbar */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: oklch(1 0 0 / 0.1);
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
  background: oklch(1 0 0 / 0.2);
}