:root {
  
  --color-base:        #1a1a1a;
  --color-base-deep:   #111111;
  --color-surface:     #242424;
  --color-surface-2:   #2e2e2e;
  --color-steel:       #3a3a3a;
  --color-bone:        #f0ebe3;
  --color-bone-dim:    #d8d2c8;
  --color-white:       #ffffff;
  --color-burgundy:    #7d1f2e;
  --color-burgundy-dk: #5c1620;
  --color-burgundy-lt: #a02840;
  --color-copper:      #b5762a;
  --color-copper-lt:   #d4952e;
  --color-muted:       #8a8a8a;
  --color-muted-lt:    #b0b0b0;
  --color-error:       #c0392b;
  --color-success:     #2e7d52;

  
  --chapter-berlin:   #7d1f2e;
  --chapter-hamburg:  #1f4d7d;
  --chapter-dortmund: #b5762a;
  --chapter-koeln:    #2e5e3e;

  
  --font-display:  'Georgia', 'Times New Roman', serif;
  --font-body:     'Helvetica Neue', 'Arial', sans-serif;
  --font-mono:     'Courier New', monospace;

  --text-xs:   0.75rem;    
  --text-sm:   0.875rem;   
  --text-base: 1rem;       
  --text-md:   1.125rem;   
  --text-lg:   1.25rem;    
  --text-xl:   1.5rem;     
  --text-2xl:  2rem;       
  --text-3xl:  2.5rem;     
  --text-4xl:  3.25rem;    
  --text-5xl:  4.5rem;     

  --leading-tight:  1.15;
  --leading-snug:   1.3;
  --leading-normal: 1.6;
  --leading-loose:  1.8;

  --tracking-tight: -0.03em;
  --tracking-base:  0;
  --tracking-wide:  0.06em;
  --tracking-wider: 0.12em;

  
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
  --space-40: 10rem;

  
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  
  --border-thin:   1px solid var(--color-steel);
  --border-bone:   1px solid var(--color-bone-dim);
  --border-burg:   1px solid var(--color-burgundy);

  
  --shadow-sm:  0 1px 4px rgba(0,0,0,0.4);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg:  0 8px 32px rgba(0,0,0,0.6);
  --shadow-xl:  0 16px 48px rgba(0,0,0,0.7);
  --glow-burg:  0 0 20px rgba(125,31,46,0.35);

  
  --transition-fast:   150ms ease;
  --transition-base:   250ms ease;
  --transition-slow:   400ms ease;
  --transition-spring: 350ms cubic-bezier(0.34, 1.56, 0.64, 1);

  
  --container-sm:  640px;
  --container-md:  900px;
  --container-lg:  1200px;
  --container-xl:  1440px;

  
  --z-base:    0;
  --z-above:   10;
  --z-overlay: 100;
  --z-modal:   200;
  --z-header:  300;
  --z-toast:   400;

  
  --header-h: 72px;
}


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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--color-base);
  color: var(--color-bone);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }
ul, ol { list-style: none; }
input, select, textarea { font: inherit; }
table { border-collapse: collapse; }


h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  font-weight: 400;
  color: var(--color-bone);
}

h1 { font-size: clamp(2.4rem, 6vw, var(--text-5xl)); }
h2 { font-size: clamp(1.8rem, 4vw, var(--text-4xl)); }
h3 { font-size: clamp(1.4rem, 3vw, var(--text-3xl)); }
h4 { font-size: clamp(1.1rem, 2.5vw, var(--text-2xl)); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p { line-height: var(--leading-normal); color: var(--color-muted-lt); }
p + p { margin-top: var(--space-4); }

strong { color: var(--color-bone); font-weight: 600; }
em { font-style: italic; }

.label-overline {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-copper);
}

.label-tag {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-muted);
}


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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border-width: 0;
}


@media (prefers-reduced-motion: no-preference) {
  [data-reveal] {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
  }
  [data-reveal="left"] { transform: translateX(-24px); }
  [data-reveal="right"] { transform: translateX(24px); }
  [data-reveal="scale"] { transform: scale(0.95); }
  [data-reveal].revealed {
    opacity: 1;
    transform: none;
  }
}


.u-text-center  { text-align: center; }
.u-text-right   { text-align: right; }
.u-text-bone    { color: var(--color-bone); }
.u-text-muted   { color: var(--color-muted); }
.u-text-copper  { color: var(--color-copper); }
.u-text-burg    { color: var(--color-burgundy-lt); }

.u-mt-2  { margin-top: var(--space-2); }
.u-mt-4  { margin-top: var(--space-4); }
.u-mt-8  { margin-top: var(--space-8); }
.u-mt-12 { margin-top: var(--space-12); }
.u-mb-4  { margin-bottom: var(--space-4); }
.u-mb-8  { margin-bottom: var(--space-8); }

.u-hidden { display: none !important; }
.u-flex   { display: flex; }
.u-grid   { display: grid; }

.u-divider {
  border: none;
  border-top: var(--border-thin);
  margin: var(--space-8) 0;
}


.page-enter {
  animation: pageIn 0.4s ease forwards;
}
@keyframes pageIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}


::selection {
  background: var(--color-burgundy);
  color: var(--color-bone);
}


::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--color-base); }
::-webkit-scrollbar-thumb { background: var(--color-steel); border-radius: var(--radius-full); }
::-webkit-scrollbar-thumb:hover { background: var(--color-muted); }