/* ==============================================
   styles.css – Version 1.1.1 Clean & Structured
   ==============================================

   Enthält klare Abschnitte, Kommentare und CSS-Variablen.
*/

/* ----------------------------------------------
   1. Root-Variablen: Farben, Abstände & Größen
   ---------------------------------------------- */
:root {
  /* Hintergrund-Verläufe */
  --bg-home-start:    #ececec;
  --bg-home-end:      #93c0e3;
  --bg-quiz-start:    #ececec;
  --bg-quiz-end:      #ffc53a;

  /* Navbar-Hintergründe */
  --topnav-bg:        transparent;
  --bottomnav-bg:     #ffffff;

  /* Button- und Textfarben */
  --btn-bg:           #ffffff;
  --btn-border:       #dddddd;
  --btn-hover:        #f0f0f0;
  --text-color:       #1f2937;

  /* Abstände & Radien */
  --space-xs:         0.5rem;
  --space:            1rem;
  --radius:           1rem;

  /* Navigationsgrößen */
  --nav-height:       4.5rem;
  --nav-btn-size:     4.5rem;

  /* Overlay-Button-Größe */
  --overlay-btn-size: 2.5rem;
  --overlay-icon-size: 1.2rem;

  /* Quiz-Hinweis-Farbe */
  --bg-quiz-hint:     #443322;

  /* Toggle-Switch */
  --toggle-w:         56px;
  --toggle-h:         32px;
  --toggle-thumb:     20px;
  --toggle-bg-off:    #93c0e3; /* Schiene OFF */
  --toggle-bg-on:     #ffc53a; /* Schiene ON */
  --toggle-thumb-off: #ffffff; /* Thumb OFF */
  --toggle-thumb-on:  #ffffff; /* Thumb ON */
}

/* ----------------------------------------------
   2. Global Reset & Body-Styling
   ---------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html, body {
  height: 100%;
}
body {
  font-family: 'Barlow', sans-serif;
  color: var(--text-color);
  background: linear-gradient(
    to bottom,
    var(--bg-home-start),
    var(--bg-home-end)
  );
  transition: background 0.4s ease;
  padding-bottom: var(--nav-height);
}
body.quizmode {
  background: linear-gradient(
    to bottom,
    var(--bg-quiz-start),
    var(--bg-quiz-end)
  );
}

/* ----------------------------------------------
   3. Top Navbar
   ---------------------------------------------- */
#topNav {
  position: sticky;
  top: 0;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-xs) var(--space);
  background: var(--topnav-bg);
  z-index: 100;
}
#topNav.hidden {
  display: none;
}

/* Back-Button */
#navBack {
  width: var(--nav-btn-size);
  height: var(--nav-btn-size);
  background: none;
  border: none;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.2s ease;
}
#navBack.opacity-0 {
  opacity: 0;
  pointer-events: none;
}
#navBack .icon {
  width: calc(var(--nav-btn-size) * 0.6);
  height: calc(var(--nav-btn-size) * 0.6);
}

/* Titel */
#navTitle {
  flex: 1;
  text-align: center;
  font-size: 0.875rem;
  font-weight: 600;
  color: #555;
}

/* Rechts (Controls) */
#navRight {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

/* ----------------------------------------------
   4. Quiz-Hinweis (Fixed Bottom)
   ---------------------------------------------- */
#quizHint {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg-quiz-hint);
  color: #fff;
  padding: 0.75rem var(--space);
  font-size: 0.9rem;
  text-align: center;
  opacity: 0;
  transform: translateY(100%);
  transition: transform 0.3s ease, opacity 0.3s ease;
  pointer-events: none;
  z-index: 200;
}
#quizHint.active {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* ----------------------------------------------
   5. App Wrapper & Section-Buttons
   ---------------------------------------------- */
#app {
  max-width: 640px;
  margin: 0 auto;
  padding: var(--space);
}
.btn-section {
  display: block;
  width: 100%;
  padding: var(--space);
  margin-bottom: var(--space);
  background: var(--btn-bg);
  color: var(--text-color);
  border: 1px solid var(--btn-border);
  border-radius: var(--radius);
  font-size: 1.15rem;
  text-align: center;
  transition: background 0.2s ease, transform 0.1s ease;
}
.btn-section:hover {
  background: var(--btn-hover);
  transform: translateY(-2px);
}

/* ----------------------------------------------
   6. Grid & Audio-Buttons
   ---------------------------------------------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  gap: var(--space);
  width: 100%;
}
.btn-small {
  max-width: 180px;
  margin: 0 auto;
  border-radius: var(--radius);
}

/* ----------------------------------------------
   7. Control-Buttons (Shuffle & Stop)
   ---------------------------------------------- */
.control-button {
  background: var(--btn-bg);
  border: none;
  width: var(--nav-height);
  height: var(--nav-height);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s ease;
}
.control-button:hover {
  background: var(--btn-hover);
}
.control-button .icon {
  width: 1.5rem;
  height: 1.5rem;
}

/* ----------------------------------------------
   8. Overlay (Pause & Stop)
   ---------------------------------------------- */
.overlay {
  display: none;
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.5);
  border-radius: var(--radius);
  justify-content: center;
  align-items: center;
  z-index: 10;
}
.pulse .overlay {
  display: flex !important;
}
.overlay button {
  width: var(--overlay-btn-size);
  height: var(--overlay-btn-size);
  border-radius: 50%;
  background: var(--btn-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: #000;
  border: none;
  transition: transform 0.2s ease, background 0.2s ease;
}
.overlay button:hover {
  transform: scale(1.2);
  background: var(--btn-hover);
}

/* ----------------------------------------------
   9. Toggle-Switch (rein CSS)
   ---------------------------------------------- */
.switch {
  position: relative;
  width: var(--toggle-w);
  height: var(--toggle-h);
}
.switch input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}
.slider {
  position: absolute;
  inset: 0;
  background: var(--toggle-bg-off);
  border-radius: 9999px;
  transition: background 0.3s ease;
}
.slider::before {
  content: "";
  position: absolute;
  width: var(--toggle-thumb);
  height: var(--toggle-thumb);
  top: calc((var(--toggle-h) - var(--toggle-thumb)) / 2);
  left: calc((var(--toggle-h) - var(--toggle-thumb)) / 2);
  background: var(--toggle-thumb-off);
  border-radius: 50%;
  transition: transform 0.3s ease, background 0.3s ease;
}
.switch input:checked + .slider {
  background: var(--toggle-bg-on);
}
.switch input:checked + .slider::before {
  transform: translateX(calc(var(--toggle-w) - var(--toggle-h)));
  background: var(--toggle-thumb-on);
}

/* ----------------------------------------------
   10. Bottom Navbar (nur Mobil)
   ---------------------------------------------- */
#bottomNav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--bottomnav-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space);
  z-index: 100;
}
@media (min-width: 641px) {
  #bottomNav {
    display: none;
  }
}

#app .overlay button img.icon {
  width: var(--overlay-icon-size) !important;
  height: var(--overlay-icon-size) !important;
  object-fit: contain;
}