/**
 * Base Styles
 * Reset, CSS Custom Properties (Design Tokens), and Typography
 */

/* ============================================
   CSS Reset
   ============================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  line-height: 1;
}

ol,
ul {
  list-style: none;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

input,
button,
textarea,
select {
  font: inherit;
}

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

button {
  background: none;
  border: none;
  cursor: pointer;
}

/* ============================================
   CSS Custom Properties (Design Tokens)
   ============================================ */

:root {
  /* Colors */
  --color-bg-primary: #1b1f22;
  --color-bg-secondary: #000000;
  --color-bg-overlay: rgba(19, 21, 25, 0.5);
  --color-text-primary: #ffffff;
  --color-text-secondary: rgba(255, 255, 255, 0.5);
  --color-border: #ffffff;
  --color-border-bg: rgba(255, 255, 255, 0.075);
  --color-border-bg-alt: rgba(255, 255, 255, 0.175);

  /* Typography */
  --font-family-primary: 'Source Sans Pro', sans-serif;
  --font-family-mono: 'Courier New', monospace;
  --font-weight-normal: 300;
  --font-weight-bold: 600;
  --font-letter-spacing: 0.2rem;
  --font-letter-spacing-heading: 0.5rem;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 3.5rem;

  /* Layout */
  --border-width: 1px;
  --border-radius: 4px;
  --border-radius-rounded: 16px;
  --element-height: 2.75rem;
  --max-content-width: 40rem;

  /* Transitions & Animations */
  --transition-fast: 0.2s;
  --transition-normal: 0.325s;
  --transition-slow: 0.75s;
  --transition-bg: 2.5s;
  --transition-intro: 0.75s;

  /* Z-index layers */
  --z-index-base: 10000;
  --z-index-bg: 1;
  --z-index-wrapper: 2;
  --z-index-main: 3;
  --z-index-modal: 4;

  /* Breakpoints (for reference, use in media queries) */
  --breakpoint-xxsmall: 360px;
  --breakpoint-xsmall: 480px;
  --breakpoint-small: 736px;
  --breakpoint-medium: 980px;
  --breakpoint-large: 1280px;
  --breakpoint-xlarge: 1680px;
}

/* ============================================
   Typography
   ============================================ */

html {
  font-size: 16pt;
}

@media (max-width: 1680px) {
  html {
    font-size: 12pt;
  }
}

@media (max-width: 736px) {
  html {
    font-size: 11pt;
  }
}

@media (max-width: 360px) {
  html {
    font-size: 10pt;
  }
}

body,
input,
select,
textarea {
  color: var(--color-text-primary);
  font-family: var(--font-family-primary);
  font-weight: var(--font-weight-normal);
  font-size: 1rem;
  line-height: 1.65;
}

a {
  transition: color var(--transition-fast) ease-in-out,
              background-color var(--transition-fast) ease-in-out,
              border-bottom-color var(--transition-fast) ease-in-out;
  border-bottom: dotted 1px var(--color-text-secondary);
  text-decoration: none;
  color: inherit;
}

a:hover {
  border-bottom-color: transparent;
}

strong,
b {
  color: var(--color-text-primary);
  font-weight: var(--font-weight-bold);
}

em,
i {
  font-style: italic;
}

p {
  margin: 0 0 var(--spacing-md) 0;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--color-text-primary);
  font-weight: var(--font-weight-bold);
  line-height: 1.5;
  margin: 0 0 calc(var(--spacing-md) * 0.5) 0;
  text-transform: uppercase;
  letter-spacing: var(--font-letter-spacing);
}

h1 a,
h2 a,
h3 a,
h4 a,
h5 a,
h6 a {
  color: inherit;
  text-decoration: none;
}

h1 {
  font-size: 2.25rem;
  line-height: 1.3;
  letter-spacing: var(--font-letter-spacing-heading);
}

h2 {
  font-size: 1.5rem;
  line-height: 1.4;
  letter-spacing: var(--font-letter-spacing-heading);
}

h3 {
  font-size: 1rem;
}

h4 {
  font-size: 0.8rem;
}

h5 {
  font-size: 0.7rem;
}

h6 {
  font-size: 0.6rem;
}

@media (max-width: 736px) {
  h1 {
    font-size: 1.75rem;
    line-height: 1.4;
  }

  h2 {
    font-size: 1.25em;
    line-height: 1.5;
  }
}

h2.major,
h3.major {
  border-bottom: solid var(--border-width) var(--color-border);
  width: max-content;
  padding-bottom: 0.5rem;
  margin: 0 0 var(--spacing-md) 0;
}

sub {
  font-size: 0.8rem;
  position: relative;
  top: 0.5rem;
}

sup {
  font-size: 0.8rem;
  position: relative;
  top: -0.5rem;
}

blockquote {
  border-left: solid calc(var(--border-width) * 4) var(--color-border);
  font-style: italic;
  margin: 0 0 var(--spacing-md) 0;
  padding: calc(var(--spacing-md) / 4) 0 calc(var(--spacing-md) / 4) var(--spacing-md);
}

code {
  background: var(--color-border-bg);
  border-radius: var(--border-radius);
  font-family: var(--font-family-mono);
  font-size: 0.9rem;
  margin: 0 0.25rem;
  padding: 0.25rem 0.65rem;
}

pre {
  -webkit-overflow-scrolling: touch;
  font-family: var(--font-family-mono);
  font-size: 0.9rem;
  margin: 0 0 var(--spacing-md) 0;
}

pre code {
  display: block;
  line-height: 1.75;
  padding: var(--spacing-sm) 1.5rem;
  overflow-x: auto;
}

hr {
  border: 0;
  border-bottom: solid var(--border-width) var(--color-border);
  margin: calc(var(--spacing-md) * 1.375) 0;
}

/* Utility classes */
.align-left {
  text-align: left;
}

.align-center {
  text-align: center;
}

.align-right {
  text-align: right;
}