/* Base / layout */
body {
  margin: 0;
  font-family: 'Google Sans Text', sans-serif;
  background: linear-gradient(180deg, rgba(4,14,23,1) 0%, rgba(13,27,42,1) 100%);
  color: white;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  overflow: hidden;
  flex-direction: column;
}

/* Rotate warning */
#rotate-warning {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #0d1b2a;
  color: #ffbcee;
  font-size: 1.6rem;
  opacity: 0;
  pointer-events: none;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 999;
  text-align: center;
  padding: 2rem;
  transition: opacity 0.25s ease;
}
#rotate-warning.show {
  opacity: 1;
  pointer-events: auto;
}

/* main wrapper */
main {
  width: 100%;
  max-width: 1200px;
  padding: 2rem;
  box-sizing: border-box;
}

/* content */
.content-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.75rem;
  width: 100%;
  gap: 2rem;
  flex-wrap: nowrap;
}

.image-container {
  flex: 0 0 70%;
  max-width: 70%;
  display: flex;
  justify-content: center;
  align-items: center;
}

#guide-image {
  width: auto;
  height: 520.4px;
  max-height: 70vh;
  filter: drop-shadow(0px 0px 5px rgba(0, 145, 255, 0.25));
  border-radius: 16px;
}

.image-text {
  flex: 1;
  white-space: pre-wrap;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow-wrap: break-word;
  min-width: 0;
}

/* Buttons row layout:
   - center-slot is absolutely centered so prev/next never move
   - left and right slots can change width without affecting the center
*/
.buttons-row {
  position: relative;
  width: 100%;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  box-sizing: border-box;
}

.left-slot, .right-slot {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-shrink: 0;
  min-height: 48px;
}

/* Center slot pinned to middle */
.center-slot {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  align-items: center;
}

/* custom buttons area (right slot) */
#custom-btn-container {
  display: flex;
  gap: 10px;
  align-items: center;
}

/* keep Material button disabled look but not removed */
.mdc-button[disabled] {
  opacity: 0.45;
  pointer-events: none;
}

/* small tweaks */
.mdc-button--outlined {
  border-color: #00bcd4;
  color: #00bcd4;
  box-shadow: 0px 0px 7px rgba(0,0,0,0.6);
}

.mdc-button--raised {
  background-color: #ff9800;
  color: #000;
  box-shadow: 0px 4px 12px rgba(0,0,0,0.6);
}

.mdc-button--raised:hover { background-color: #fb8c00; }

/* Help overlay */
#help-overlay {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.86);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 10000;
  padding: 1.5rem;
  box-sizing: border-box;
}

#help-overlay[aria-hidden="false"] { display: flex; }

.help-content {
  max-width: 900px;
  width: 100%;
  max-height: 90vh;
  text-align: center;
  position: relative;
  color: white;
  background: linear-gradient(180deg, rgba(6,10,15,0.85), rgba(10,15,20,0.95));
  border-radius: 12px;
  padding: 1rem 1.25rem 1.5rem 1.25rem;
  box-sizing: border-box;
  overflow: auto;
}

#help-close {
  position: absolute;
  top: 8px;
  right: 10px;
  background: none;
  border: none;
  color: white;
  font-size: 1.6rem;
  cursor: pointer;
}

.help-content img {
  max-width: 100%;
  max-height: 55vh;
  border-radius: 8px;
  display: block;
  margin: 0 auto 0.75rem auto;
}

#help-text {
  white-space: pre-wrap;
  font-size: 1rem;
  line-height: 1.5;
}

/* help nav */
.help-nav {
  margin-top: 0.75rem;
  display: flex;
  justify-content: center;
  gap: 1rem;
}

/* responsive */
@media (max-width: 768px) {
  .content-wrapper { flex-direction: column; text-align: center; gap: 1rem; }
  .image-container { max-width: 90vw; flex: none; }
  #guide-image { max-height: 50vh; }
  .image-text { max-width: 90vw; }
}

#credit {
  position: fixed;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 14px;
  color: rgba(98, 98, 98, 0.6);
  font-family: Arial, sans-serif;
  text-decoration: none;
  z-index: 9999;
  transition: color 0.3s ease;
}

#credit:hover {
  color: rgba(0, 0, 0, 0.9); /* Darker on hover */
}