/* =============================================================================
   WERKSTATTLINIE — Design-System v0.1
   Naturwissenschaftliche Werkstatt
   Thomas Schüller · forschung@tschueller.com · ORCID 0009-0003-9799-6747
   CC BY 4.0 · 2026
   ============================================================================= */

/* ----- DESIGN TOKENS ----- */
:root {
  /* Papier-Palette (warmes, neutrales Papier) */
  --wl-paper:       #f5f0e8;
  --wl-paper-2:     #ede8dc;
  --wl-paper-3:     #e3ddce;
  --wl-paper-4:     #d8d0bd;

  /* Tinte */
  --wl-ink:         #1a1612;
  --wl-ink-2:       #4a3f35;
  --wl-pale:        #6b6258;
  --wl-pale-2:      #9a9080;
  --wl-rule:        #1a1612;

  /* Akzent-Farben (semantisch) */
  --wl-accent:      #c0392b;  /* primär — Akzent, kritisch */
  --wl-accent-2:    #8b2a20;  /* primär dunkel */
  --wl-quantum:     #5b3a8c;  /* sekundär — wissenschaftlich, "ψ" */
  --wl-quantum-2:   #3a2560;  /* sekundär dunkel */
  --wl-grow:        #4a7c3a;  /* tertiär — gültig, klassisch */
  --wl-cool:        #2c5f7c;  /* tertiär — Information */

  /* Hintergründe interaktiver Elemente */
  --wl-canvas-bg:   #f9f5ed;

  /* Typografie — Stack ohne externe Fonts */
  --wl-serif:       "DejaVu Serif", Georgia, "Iowan Old Style",
                    "Palatino Linotype", "URW Palladio L",
                    "Book Antiqua", Palatino, serif;
  --wl-sans:        "DejaVu Sans", -apple-system, BlinkMacSystemFont,
                    "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --wl-mono:        "DejaVu Sans Mono", "Courier New", Courier, monospace;

  /* Größen-Skala (modular, 1.25er Quart) */
  --wl-size-xs:     0.72rem;
  --wl-size-sm:     0.85rem;
  --wl-size-base:   1rem;
  --wl-size-md:     1.15rem;
  --wl-size-lg:     1.4rem;
  --wl-size-xl:     1.75rem;
  --wl-size-2xl:    2.2rem;
  --wl-size-3xl:    clamp(2rem, 5vw, 3.2rem);

  /* Linien & Abstände */
  --wl-rule-w:      1px;
  --wl-rule-w-2:    2px;
  --wl-rule-w-3:    3px;
  --wl-radius:      0;            /* keine Rundungen — Werkbank-Ästhetik */

  /* Spacing-Skala */
  --wl-sp-1:        0.3rem;
  --wl-sp-2:        0.6rem;
  --wl-sp-3:        1rem;
  --wl-sp-4:        1.5rem;
  --wl-sp-5:        2.2rem;
  --wl-sp-6:        3.2rem;

  /* Letter-Spacing — werkstatt-typisch sperrig */
  --wl-track-loose: 0.18em;
  --wl-track-mid:   0.1em;
  --wl-track-tight: 0.05em;
}

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

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

body {
  background: var(--wl-paper);
  color: var(--wl-ink);
  font-family: var(--wl-serif);
  line-height: 1.65;
  min-height: 100vh;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

/* ----- TYPOGRAFIE ----- */
h1, h2, h3, h4 {
  font-family: var(--wl-serif);
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.15;
}

h1 { font-size: var(--wl-size-3xl); }
h2 { font-size: var(--wl-size-xl); }
h3 { font-size: var(--wl-size-md); font-weight: 700;
     text-transform: uppercase; letter-spacing: var(--wl-track-mid);
     color: var(--wl-pale); }

.wl-mono { font-family: var(--wl-mono); }
.wl-label {
  font-family: var(--wl-mono);
  font-size: var(--wl-size-xs);
  letter-spacing: var(--wl-track-loose);
  text-transform: uppercase;
  color: var(--wl-pale);
}

/* ----- BUTTONS ----- */
.wl-btn {
  background: var(--wl-ink);
  color: var(--wl-paper);
  border: none;
  padding: 0.6rem 1rem;
  font-family: inherit;
  font-size: var(--wl-size-sm);
  font-weight: 700;
  cursor: pointer;
  letter-spacing: var(--wl-track-tight);
  text-transform: uppercase;
  transition: background 0.15s;
}
.wl-btn:hover { background: var(--wl-quantum); }
.wl-btn--secondary {
  background: transparent;
  color: var(--wl-ink);
  border: 1px solid var(--wl-ink);
}
.wl-btn--secondary:hover {
  background: var(--wl-ink);
  color: var(--wl-paper);
}

/* ----- RANGE INPUT ----- */
.wl-range {
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  background: var(--wl-paper-3);
  border: 1px solid var(--wl-rule);
  outline: none;
  margin: 0.3rem 0;
}
.wl-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  background: var(--wl-quantum);
  border: 2px solid var(--wl-ink);
  cursor: pointer;
  border-radius: 0;
}
.wl-range::-moz-range-thumb {
  width: 22px;
  height: 22px;
  background: var(--wl-quantum);
  border: 2px solid var(--wl-ink);
  cursor: pointer;
  border-radius: 0;
}

/* ----- FOCUS — WCAG 2.1 AA Pflicht ----- */
button:focus-visible,
input:focus-visible,
summary:focus-visible,
a:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--wl-quantum);
  outline-offset: 2px;
}

/* ----- A11Y: Skip-Link ----- */
.wl-skip {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--wl-ink);
  color: var(--wl-paper);
  padding: 0.6rem 1rem;
  font-family: var(--wl-mono);
  font-size: var(--wl-size-sm);
  z-index: 9999;
}
.wl-skip:focus { top: 0; }

/* ----- REDUCED MOTION ----- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ----- PRINT ----- */
@media print {
  body { background: white; color: black; }
  .wl-no-print { display: none !important; }
  canvas { border: 1px solid #888; }
}

/* ----- DARK MODE (Auto) ----- */
@media (prefers-color-scheme: dark) {
  :root {
    --wl-paper:       #1a1612;
    --wl-paper-2:     #251f1a;
    --wl-paper-3:     #2f2922;
    --wl-paper-4:     #3a322a;
    --wl-ink:         #f5f0e8;
    --wl-ink-2:       #d8d0bd;
    --wl-pale:        #9a9080;
    --wl-pale-2:      #6b6258;
    --wl-rule:        #f5f0e8;
    --wl-canvas-bg:   #2f2922;
  }
}

/* =============================================================================
   v0.1.1 — Komponenten-Erweiterung 2026-05-07
   Ergänzung der Master-Klassen (Regel #15): .wl-header/.wl-card/.wl-step/
   .wl-tag/.wl-box/.wl-stop/.wl-footer/.wl-table/.wl-nav-tabs/.wl-stats
   ============================================================================= */

/* ----- BODY-EBENEN ----- */
body.ebene-paper    { line-height: 1.7; font-size: 1rem; }
body.ebene-werkzeug { line-height: 1.55; font-family: var(--wl-sans); }
body.ebene-homepage { line-height: 1.6; }

/* ----- LAYOUT-WRAPPER ----- */
.wl-wrap         { max-width: 1100px; margin: 0 auto; padding: 2rem; }
.wl-wrap--narrow { max-width: 860px; margin: 0 auto; padding: 0 2rem; }

/* ----- HEADER ----- */
.wl-header {
  border-bottom: 3px double var(--wl-rule);
  padding: var(--wl-sp-3) var(--wl-sp-5);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--wl-sp-3);
}
.wl-header__brand {
  font-weight: 900;
  letter-spacing: var(--wl-track-loose);
  text-transform: uppercase;
  font-size: 0.95rem;
}
.wl-header__brand-mark {
  color: var(--wl-quantum);
  margin-right: 0.4rem;
  font-style: italic;
}
.wl-header__meta {
  font-family: var(--wl-mono);
  font-size: var(--wl-size-xs);
  color: var(--wl-pale);
  letter-spacing: var(--wl-track-tight);
  text-align: right;
}

/* ----- NAV / TABS ----- */
.wl-nav-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin: var(--wl-sp-5) 0 0;
  border-bottom: var(--wl-rule-w-2) solid var(--wl-rule);
}
.wl-nav-tabs__btn {
  background: transparent;
  border: none;
  padding: 0.9rem 1.4rem;
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 700;
  cursor: pointer;
  color: var(--wl-pale);
  border-bottom: var(--wl-rule-w-3) solid transparent;
  margin-bottom: -2px;
  transition: color 0.15s;
}
.wl-nav-tabs__btn:hover { color: var(--wl-ink); }
.wl-nav-tabs__btn[aria-selected="true"] {
  color: var(--wl-ink);
  border-bottom-color: var(--wl-quantum);
}
.wl-nav-tabs__num {
  font-family: var(--wl-mono);
  font-size: 0.7rem;
  color: var(--wl-quantum);
  margin-right: 0.4rem;
  letter-spacing: var(--wl-track-tight);
}

/* ----- KARTEN ----- */
.wl-card {
  background: var(--wl-paper-2);
  border: 1px solid var(--wl-rule);
  padding: var(--wl-sp-4);
}
.wl-card--accent { border-left: 4px solid var(--wl-quantum); }
.wl-card--canvas { padding: var(--wl-sp-3); min-height: 320px; position: relative; }

/* ----- BOX / OBSERVATION ----- */
.wl-box {
  background: linear-gradient(to right, var(--wl-paper-2) 0%, var(--wl-paper) 100%);
  border-left: 4px solid var(--wl-quantum);
  padding: 1.2rem 1.4rem;
  margin: 1.5rem 0;
}
.wl-box__label {
  display: block;
  font-family: var(--wl-mono);
  font-size: 0.7rem;
  letter-spacing: var(--wl-track-loose);
  text-transform: uppercase;
  color: var(--wl-quantum);
  margin-bottom: 0.4rem;
  font-weight: 700;
}
.wl-box__body { font-style: italic; }

/* ----- SCHRITT-STEPPER ----- */
.wl-step {
  background: var(--wl-paper);
  padding: 1.5rem 1.2rem;
  text-align: center;
  border: 1px solid var(--wl-rule);
}
.wl-step__num {
  font-family: var(--wl-serif);
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--wl-accent);
  opacity: 0.25;
  line-height: 1;
  margin-bottom: 0.5rem;
}
.wl-step__label {
  font-family: var(--wl-mono);
  font-size: 0.6rem;
  letter-spacing: var(--wl-track-loose);
  text-transform: uppercase;
  color: var(--wl-pale);
  margin-bottom: 0.6rem;
}

/* ----- TAG ----- */
.wl-tag {
  display: inline-block;
  font-family: var(--wl-mono);
  font-size: 0.7rem;
  letter-spacing: var(--wl-track-tight);
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  background: var(--wl-paper-3);
  border: 1px solid var(--wl-rule);
  color: var(--wl-ink);
}
.wl-tag--accent { background: var(--wl-quantum); color: var(--wl-paper); border-color: var(--wl-quantum); }
.wl-tag--ok     { background: var(--wl-grow); color: var(--wl-paper); border-color: var(--wl-grow); }
.wl-tag--warn   { background: var(--wl-accent); color: var(--wl-paper); border-color: var(--wl-accent); }

/* ----- STOP / WARNUNG ----- */
.wl-stop {
  background: var(--wl-paper-2);
  border-left: 4px solid var(--wl-accent);
  padding: 1rem 1.2rem;
  margin: 1rem 0;
}
.wl-stop__label {
  font-family: var(--wl-mono);
  font-size: 0.7rem;
  letter-spacing: var(--wl-track-loose);
  text-transform: uppercase;
  color: var(--wl-accent);
  font-weight: 700;
  margin-bottom: 0.4rem;
}

/* ----- CONTROLS ----- */
.wl-control { margin-bottom: 1.2rem; }
.wl-control:last-child { margin-bottom: 0; }
.wl-control__label {
  display: block;
  font-size: var(--wl-size-sm);
  font-weight: 700;
  margin-bottom: 0.4rem;
}
.wl-control__value {
  font-family: var(--wl-mono);
  color: var(--wl-quantum);
  font-weight: 700;
}
.wl-toggle {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  cursor: pointer;
  user-select: none;
  font-size: 0.9rem;
  margin-bottom: 0.6rem;
}
.wl-toggle input { width: 18px; height: 18px; cursor: pointer; accent-color: var(--wl-quantum); }

/* ----- STATS / METRIK ----- */
.wl-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.6rem;
  margin-top: 1rem;
}
.wl-stat {
  background: var(--wl-paper-3);
  padding: 0.6rem 0.8rem;
  border-left: var(--wl-rule-w-3) solid var(--wl-quantum);
}
.wl-stat__label {
  font-family: var(--wl-mono);
  font-size: 0.62rem;
  letter-spacing: var(--wl-track-mid);
  text-transform: uppercase;
  color: var(--wl-pale);
  margin-bottom: 0.2rem;
}
.wl-stat__value {
  font-family: var(--wl-mono);
  font-weight: 700;
  font-size: 1.05rem;
}

/* ----- TABELLEN ----- */
.wl-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.92rem;
}
.wl-table th,
.wl-table td {
  border: 1px solid var(--wl-rule);
  padding: 0.5rem 0.8rem;
  text-align: left;
}
.wl-table th { background: var(--wl-paper-2); font-weight: 700; }

/* ----- DETAILS / KOLLAPS ----- */
details.wl-details {
  margin: 1rem 0;
  border: 1px solid var(--wl-rule);
  background: var(--wl-paper-2);
}
details.wl-details > summary {
  padding: 0.7rem 1rem;
  cursor: pointer;
  font-family: var(--wl-mono);
  font-size: 0.8rem;
  letter-spacing: var(--wl-track-mid);
  text-transform: uppercase;
  font-weight: 700;
  list-style: none;
}
details.wl-details > summary::-webkit-details-marker { display: none; }
details.wl-details > summary::before {
  content: '▸';
  margin-right: 0.5rem;
  color: var(--wl-quantum);
}
details.wl-details[open] > summary::before { content: '▾'; }
details.wl-details > .wl-details__body {
  padding: 0.4rem 1.2rem 1.2rem;
  font-family: var(--wl-serif);
  font-size: 0.92rem;
  line-height: 1.6;
}

/* ----- FORMEL ----- */
.wl-formula {
  font-family: var(--wl-mono);
  background: var(--wl-paper-3);
  padding: 0.6rem 0.8rem;
  margin: 0.6rem 0;
  border-left: var(--wl-rule-w-2) solid var(--wl-quantum);
  overflow-x: auto;
}

/* ----- LANG TOGGLE ----- */
.wl-lang-toggle {
  display: inline-flex;
  gap: 0.3rem;
  font-family: var(--wl-mono);
  font-size: 0.7rem;
}
.wl-lang-toggle button {
  background: transparent;
  border: 1px solid var(--wl-rule);
  padding: 0.2rem 0.5rem;
  cursor: pointer;
  color: var(--wl-ink);
  font-family: inherit;
  font-size: inherit;
  letter-spacing: var(--wl-track-tight);
}
.wl-lang-toggle button[aria-pressed="true"] {
  background: var(--wl-ink);
  color: var(--wl-paper);
}

[data-lang-de] { }
[data-lang-en] { display: none; }
body.en [data-lang-de] { display: none; }
body.en [data-lang-en] { display: initial; }

/* ----- FOOTER ----- */
.wl-footer {
  border-top: var(--wl-rule-w-2) solid var(--wl-rule);
  padding: var(--wl-sp-5);
  text-align: center;
  font-family: var(--wl-mono);
  font-size: var(--wl-size-xs);
  letter-spacing: var(--wl-track-tight);
  color: var(--wl-pale);
  margin-top: var(--wl-sp-6);
  line-height: 1.8;
}
.wl-footer__orcid   { color: var(--wl-quantum); font-weight: 700; }
.wl-footer__license { color: var(--wl-grow);    font-weight: 700; }

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