/* ---------- Variables ---------- */
:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-muted: #5f5f5f;
  --color-border: #e5e5e5;

  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --max-width: 640px;
  --spacing: 1.5rem;
}

/* ---------- Dark mode: quick invert (temporary, will refine later) ---------- */
html.dark-mode {
  filter: invert(1) hue-rotate(180deg);
}

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

body {
  margin: 0;
  font-family: var(--font-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---------- Page ---------- */
.page {
  flex: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 4rem var(--spacing) 2rem;
  width: 100%;
}

.page h1 {
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
}

.page p {
  margin-bottom: 1.25rem;
}

/* ---------- Language / theme controls ---------- */
.controls {
  position: fixed;
  top: 1rem;
  right: 1rem;
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.lang-switch {
  display: flex;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  overflow: hidden;
}

.lang-btn {
  background: none;
  border: none;
  padding: 0.35rem 0.6rem;
  font-size: 0.8rem;
  font-family: inherit;
  cursor: pointer;
  color: var(--color-muted);
}

.lang-btn.active {
  background: var(--color-text);
  color: var(--color-bg);
}

.theme-btn {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  width: 2rem;
  height: 2rem;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ---------- Language content switching ---------- */
p[data-lang] {
  display: none;
}

html.lang-de p[data-lang="de"] {
  display: block;
}

html.lang-en p[data-lang="en"] {
  display: block;
}

/* ---------- Footer ---------- */
.site-footer {
  text-align: center;
  color: var(--color-muted);
  font-size: 0.85rem;
  padding: 1.5rem var(--spacing);
}

.site-footer p {
  margin: 0;
}