/* ============================================================
   programm.art · gemeinsame Basis
   Tokens, Reset, Header, Footer, Reveal, Utilities.
   Keine externen Schriften, keine Tracker.
   ============================================================ */

/* ---------- Tokens ---------- */
:root {
  /* Hell ist der Standard. Dunkel wird ausschließlich über
     data-theme="dark" am <html> aktiviert, nicht per Systemeinstellung. */
  color-scheme: light;
  --bg: #f1f3f7;
  --bg-alt: #e9edf3;
  --surface: #fbfcfe;
  /* Text in zwei Stufen: Primär (--ink) und Sekundär (--ink-soft).
     --muted ist bewusst keine dritte Graustufe, sondern dieselbe
     Sekundärstufe. Sekundärtext hält in beiden Modi mindestens 4.5:1. */
  --ink: #1a1a18;
  --ink-soft: #4b4b47;
  --muted: var(--ink-soft);
  --line: rgba(26, 26, 24, 0.12);
  --line-soft: rgba(26, 26, 24, 0.06);
  --line-strong: rgba(26, 26, 24, 0.28);

  /* Ein einziger, zurückhaltender Akzent: nur für Funktion. */
  --accent: #35605a;
  --accent-ink: #294b46;

  --wrap: 1140px;
  --prose: 66ch;
  --radius: 6px;
  --radius-sm: 4px;

  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-display: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, "Times New Roman", serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --step: clamp(3.5rem, 9vw, 6.5rem);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #131312;
  --bg-alt: #191917;
  --surface: #1c1c1a;
  --ink: #e6e6e6;
  --ink-soft: #b4b3ad;
  --muted: var(--ink-soft);
  --line: rgba(236, 234, 228, 0.13);
  --line-soft: rgba(236, 234, 228, 0.08);
  --line-strong: rgba(236, 234, 228, 0.3);
  --accent: #8fb9ae;
  --accent-ink: #a9cec4;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin: 0;
  color: var(--ink);
}

p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

a { color: inherit; }

button { font: inherit; color: inherit; }

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

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

.skip-link {
  position: absolute;
  left: 0.75rem;
  top: -3rem;
  z-index: 100;
  padding: 0.6rem 1rem;
  background: var(--ink);
  color: var(--bg);
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  font-size: 0.9rem;
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 0; }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(1.15rem, 5vw, 2.5rem);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: saturate(120%) blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}
.site-header.is-scrolled { border-bottom-color: var(--line); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.25rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  letter-spacing: 0.01em;
}
.brand-name { color: var(--ink); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

/* Der Mond sitzt hinter dem Menü, nicht davor. */
.theme-toggle { order: 2; }

.theme-toggle {
  display: inline-grid;
  place-items: center;
  width: 2.35rem;
  height: 2.35rem;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.theme-toggle:hover { color: var(--ink); border-color: var(--line-strong); }
.theme-toggle svg { fill: none; stroke: currentColor; stroke-width: 1.6; }
.theme-toggle .icon-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: block; }

.nav-toggle {
  display: none;
  width: 2.35rem;
  height: 2.35rem;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  position: relative;
}
.nav-toggle-bar,
.nav-toggle-bar::before,
.nav-toggle-bar::after {
  position: absolute;
  left: 50%;
  width: 15px;
  height: 1.5px;
  background: var(--ink);
  transform: translateX(-50%);
  transition: transform 0.25s var(--ease), opacity 0.2s var(--ease);
}
.nav-toggle-bar { top: 50%; margin-top: -0.75px; }
.nav-toggle-bar::before { content: ""; top: -5px; }
.nav-toggle-bar::after { content: ""; top: 5px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::before { transform: translateX(-50%) rotate(45deg); top: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::after { transform: translateX(-50%) rotate(-45deg); top: 0; }

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.35rem;
  font-family: var(--font-mono);
  font-size: 0.84rem;
}
.site-nav a {
  text-decoration: none;
  color: var(--ink-soft);
  padding: 0.2rem 0 0.4rem;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.site-nav a:hover { color: var(--ink); }
/* Aktiv: 1px-Linie mit Abstand. Hover ändert nur die Textfarbe, ohne Linie. */
.site-nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--ink); }
.site-nav .nav-contact {
  color: var(--ink);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.8rem;
}
.site-nav .nav-contact:hover { border-color: var(--ink); }

/* ---------- Footer ---------- */
.site-footer { padding-block: 3rem; background: var(--bg); border-top: 1px solid var(--line); }
.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: start;
}
.footer-name { font-size: 1rem; }
.footer-links {
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.footer-links a { color: var(--ink-soft); text-decoration: none; }
.footer-links a:hover { color: var(--ink); text-decoration: underline; }
.footer-links .dot { color: var(--line-strong); }

.footer-legal { text-align: right; font-size: 0.84rem; color: var(--muted); }
.footer-impressum { line-height: 1.6; }
.footer-impressum strong { color: var(--ink); font-weight: 600; }
.placeholder {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.9em;
  border-bottom: 1px dashed var(--line-strong);
}
.footer-note { margin-top: 0.9rem; max-width: 22rem; margin-left: auto; }
.footer-copy { margin-top: 0.9rem; font-family: var(--font-mono); }

/* ---------- Reveal (progressive enhancement) ---------- */
.js .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.js .reveal.is-visible { opacity: 1; transform: none; }

/* ---------- Responsive (Shell) ---------- */
@media (max-width: 860px) {
  .nav-toggle { display: inline-block; }

  .site-nav {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: clamp(1.15rem, 5vw, 2.5rem);
    flex-direction: column;
    align-items: flex-start;
    gap: 0.15rem;
    min-width: 12rem;
    padding: 0.7rem;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    transform-origin: top right;
    opacity: 0;
    transform: scale(0.97) translateY(-4px);
    pointer-events: none;
    transition: opacity 0.2s var(--ease), transform 0.2s var(--ease);
    font-size: 0.95rem;
  }
  .site-nav.is-open {
    opacity: 1;
    transform: none;
    pointer-events: auto;
  }
  .site-nav a { width: 100%; padding: 0.5rem 0.6rem; border-radius: var(--radius-sm); }
  .site-nav a.is-active, .site-nav a[aria-current="page"] { border-bottom-color: transparent; background: var(--bg-alt); }
  .site-nav .nav-contact { border: 0; padding: 0.5rem 0.6rem; color: var(--ink); }
  /* Mobil: der Mond sitzt direkt neben dem Menüknopf, ohne zusätzlichen Abstand. */
  .theme-toggle { margin-left: 0; }
}

@media (min-width: 861px) {
  /* 20px Abstand zwischen "Kontakt" und dem Mond-Button. */
  .theme-toggle { margin-left: 1.25rem; }
}

@media (max-width: 640px) {
  .header-inner { min-height: 3.75rem; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-legal { text-align: left; }
  .footer-note { margin-left: 0; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .js .reveal { opacity: 1; transform: none; }
}

/* ---------- Print ---------- */
@media print {
  .site-header, .theme-toggle, .nav-toggle, .copy-btn { display: none; }
  body { background: #fff; color: #000; }
}