/* ==========================================================================
   1. RESET & BASE
   ========================================================================== */

/* Box sizing reset */
*,
*::before,
*::after {
  box-sizing: border-box;
}

/* Remove default margins and paddings */
html, body, h1, h2, h3, h4, h5, h6, p, figure,
blockquote, dl, dd, ul, ol, pre, table {
  margin: 0;
  padding: 0;
}

/* Remove list styles on ul, ol */
ul, ol {
  list-style: none;
}

/* Layout baseline for sticky footer and full-width sections */
html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  overflow-x: hidden;
}

body {
  display: flex;
  flex-direction: column;
  line-height: 1.6;
  font-family: 'Poppins', sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-light);
}

.app-root {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 100vh;
}

.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* Make images and media responsive by default */
img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}

/* Anchor defaults */
a {
  text-decoration: none;
  color: inherit;
}

/* Button defaults */
button {
  font: inherit;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
}

/* Form elements */
input, textarea, select {
  font: inherit;
}

/* ==========================================================================
   2. CSS VARIABLES & THEME SWITCHING
   ========================================================================== */

:root {
  --bg-dark:       #121212;
  --bg-secondary:  #1e1e1e;
  --text-light:    #eeeeee;
  --text-secondary:#bbbbbb;
  --primary-color: #8e63f3;
  --accent:        #7a53e0;
  --border-color:  #333333;

  --font-sans: 'Poppins', sans-serif;
  --transition-default: 0.3s ease;
}

[data-theme='light'] {
  --bg-dark:       #ffffff;
  --bg-secondary:  #f5f5f5;
  --text-light:    #222222;
  --text-secondary:#555555;
  --primary-color: #8e63f3;
  --accent:        #7a53e0;
  --border-color:  #dddddd;
}

/* ==========================================================================
   3. GLOBAL UTILITIES
   ========================================================================== */

/* Visually hidden (for accessibility) */
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* Container constraint */
.container {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
  box-sizing: border-box;
}

/* Smooth focus outlines */
:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}