/* ==========================================================================
   base.css — Reset, Typography, Global Styles
   Richter Kommunikation — AEO & KI-Beratung
   ========================================================================== */

/* --------------------------------------------------------------------------
   Box Sizing Reset
   -------------------------------------------------------------------------- */

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

/* --------------------------------------------------------------------------
   Margin / Padding Reset
   -------------------------------------------------------------------------- */

* {
  margin: 0;
  padding: 0;
}

/* --------------------------------------------------------------------------
   HTML & Body
   -------------------------------------------------------------------------- */

html {
  font-size: 100%;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  tab-size: 4;
}

body {
  font-family: var(--font-body);
  font-size: 1.125rem; /* 18px */
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  transition:
    color var(--transition-base),
    background-color var(--transition-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* --------------------------------------------------------------------------
   Typography Scale
   -------------------------------------------------------------------------- */

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-text-primary);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2rem, 3.5vw, 3rem);
  letter-spacing: -0.015em;
}

h3 {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  letter-spacing: -0.01em;
}

h4 {
  font-size: clamp(1.2rem, 2vw, 1.5rem);
}

h5 {
  font-size: clamp(1.05rem, 1.5vw, 1.25rem);
}

h6 {
  font-size: 1rem;
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   Paragraph & Inline Elements
   -------------------------------------------------------------------------- */

p {
  max-width: 70ch;
}

p + p {
  margin-top: var(--space-sm);
}

strong,
b {
  font-weight: 700;
}

em,
i {
  font-style: italic;
}

small {
  font-size: 0.875rem;
}

/* --------------------------------------------------------------------------
   Links
   -------------------------------------------------------------------------- */

a {
  color: var(--color-accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

a:hover {
  color: var(--color-accent-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

a:focus-visible {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 3px;
  border-radius: var(--border-radius-sm);
}

/* --------------------------------------------------------------------------
   Lists
   -------------------------------------------------------------------------- */

ul,
ol {
  padding-left: var(--space-md);
}

li {
  margin-bottom: 0.35em;
}

li:last-child {
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   Code & Preformatted Text
   -------------------------------------------------------------------------- */

code,
kbd,
samp {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background-color: var(--color-bg-secondary);
  color: var(--color-accent-primary);
  padding: 0.1em 0.4em;
  border-radius: var(--border-radius-sm);
}

pre {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--space-md);
  overflow-x: auto;
  line-height: 1.5;
}

pre code {
  background: none;
  padding: 0;
  font-size: inherit;
}

/* --------------------------------------------------------------------------
   Media
   -------------------------------------------------------------------------- */

img,
video,
svg {
  max-width: 100%;
  height: auto;
  display: block;
}

img {
  object-fit: cover;
}

/* --------------------------------------------------------------------------
   Horizontal Rule
   -------------------------------------------------------------------------- */

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-md) 0;
}

/* --------------------------------------------------------------------------
   Blockquote
   -------------------------------------------------------------------------- */

blockquote {
  border-left: 4px solid var(--color-accent-primary);
  padding-left: var(--space-md);
  margin: var(--space-md) 0;
  color: var(--color-text-secondary);
  font-style: italic;
  font-size: 1.1rem;
}

blockquote p {
  max-width: none;
}

/* --------------------------------------------------------------------------
   Tables
   -------------------------------------------------------------------------- */

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

th,
td {
  padding: var(--space-xs) var(--space-sm);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

th {
  font-weight: 600;
  color: var(--color-accent-primary);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --------------------------------------------------------------------------
   Selection
   -------------------------------------------------------------------------- */

::selection {
  background-color: var(--color-accent-primary);
  color: var(--color-bg-primary);
}

::-moz-selection {
  background-color: var(--color-accent-primary);
  color: var(--color-bg-primary);
}

/* --------------------------------------------------------------------------
   Scrollbar (Webkit)
   -------------------------------------------------------------------------- */

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--color-text-secondary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-accent-primary);
}

/* --------------------------------------------------------------------------
   Focus Styles (Accessibility)
   -------------------------------------------------------------------------- */

:focus-visible {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 3px;
}

/* Remove default focus for mouse users */
:focus:not(:focus-visible) {
  outline: none;
}

/* --------------------------------------------------------------------------
   Container
   -------------------------------------------------------------------------- */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-sm);
  }
}