/* Start page: full-viewport background (works before shell-fit.js runs). */
html.start-shell,
html.start-shell body {
  margin: 0;
  min-height: 100%;
  height: 100%;
}

html.start-shell body {
  min-height: 100vh;
  overflow-x: hidden;
}

html.start-shell .div1 {
  box-sizing: border-box;
  min-height: 100vh;
  width: 100%;
  margin: 0;
  padding: max(0.75rem, env(safe-area-inset-top))
    max(0.75rem, env(safe-area-inset-right))
    max(1rem, env(safe-area-inset-bottom))
    max(0.75rem, env(safe-area-inset-left));
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 1rem;
  overflow-x: hidden;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  background-color: #0a0a0a;
  background-image: url("../assets/shell/start.gif");
  background-repeat: no-repeat;
  background-position: center center;
  background-size: cover;
  /* scroll avoids broken fixed-attachment on iOS and some compositors */
  background-attachment: scroll;
}

/* Text column flush right; body copy left-aligned; title and Start centered in the column */
.start-shell .start-text-column {
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  width: min(100%, 40rem);
  flex: 1 1 auto;
  min-height: 0;
  gap: 1rem;
}

.start-shell .start-title {
  margin: 0;
  align-self: center;
  width: fit-content;
  max-width: min(100%, 40rem);
  color: red;
  font-family: Verdana, sans-serif;
  font-weight: bold;
  line-height: 1.35;
  font-size: clamp(1.6rem, 7vw, 2.5rem);
  text-align: center;
  text-wrap: balance;
}

.start-shell .start-copy {
  margin: 0;
  flex: 0 1 auto;
  width: min(100%, 36rem);
  max-width: 36rem;
  align-self: flex-start;
  color: #fff;
  font-family: "Courier New", Courier, monospace;
  font-size: clamp(0.8125rem, 3.4vw, 1rem);
  line-height: 1.5;
  text-align: justify;
  padding: 0 0.125rem;
  box-sizing: border-box;
}

/* Button margin-top: auto eats space between copy and Start, pinning the button to the bottom (thumb zone). */
.start-shell .button {
  flex-shrink: 0;
  align-self: center;
  margin-top: auto;
  margin-bottom: max(0.75rem, calc(env(safe-area-inset-bottom, 0px) + 0.5rem));
  min-height: 44px;
  min-width: min(100%, 11rem);
  max-width: min(100%, 20rem);
  width: auto;
  padding: 0.5rem 1.5rem;
  background: transparent;
  border: transparent;
  color: red;
  text-align: center;
  text-decoration: none;
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(1.2rem, 4.5vw, 2rem);
  cursor: pointer;
  box-shadow:
    0 50px 100px 0 rgba(0, 0, 0, 0.2),
    0 6px 20px 0 rgba(0, 0, 0, 0.19);
}

/* Landscape / short viewport: skip large auto gaps; sticky button stays reachable while scrolling */
@media (max-width: 1199px) and (max-height: 520px) {
  html.start-shell .div1 {
    gap: 0.5rem;
    padding-top: max(0.35rem, env(safe-area-inset-top));
    padding-bottom: max(0.35rem, env(safe-area-inset-bottom));
  }

  .start-shell .start-text-column .start-title {
    align-self: stretch;
    width: auto;
    max-width: none;
    text-align: center;
    font-size: clamp(1.25rem, 5vw, 1.75rem);
  }

  .start-shell .start-copy {
    font-size: clamp(0.75rem, 2.8vw, 0.875rem);
    line-height: 1.4;
  }

  .start-shell .start-text-column .button {
    align-self: stretch;
    margin-top: clamp(0.5rem, 2vmin, 1rem);
    margin-bottom: 0;
    position: sticky;
    bottom: max(0.5rem, env(safe-area-inset-bottom, 0px));
    padding-top: 0.5rem;
    padding-bottom: max(0.5rem, env(safe-area-inset-bottom, 0px));
    min-height: 40px;
    font-size: clamp(1.05rem, 4vw, 1.35rem);
    max-width: min(100%, 18rem);
    background: linear-gradient(
      to top,
      rgba(10, 10, 10, 0.95) 40%,
      rgba(10, 10, 10, 0.45) 100%
    );
    box-shadow:
      0 -10px 28px rgba(0, 0, 0, 0.4),
      0 6px 20px 0 rgba(0, 0, 0, 0.19);
  }
}

/* Wide layout: match original art placement (needs ~1200px so text column fits). */
@media (min-width: 1200px) {
  html.start-shell .div1 {
    display: block;
    padding: 0;
    gap: 0;
    align-items: stretch;
  }

  .start-shell .start-text-column {
    position: absolute;
    right: max(24px, env(safe-area-inset-right, 0px));
    left: auto;
    top: 90px;
    width: min(600px, 50vw);
    flex: none;
    gap: 0;
  }

  .start-shell .start-title {
    position: static;
    align-self: center;
    max-width: 100%;
    width: fit-content;
    font-size: 40pt;
    line-height: 150%;
    text-align: center;
  }

  .start-shell .start-copy {
    position: static;
    margin-top: 3rem;
    max-width: none;
    width: 100%;
    font-size: 15pt;
    flex: none;
    align-self: stretch;
  }

  .start-shell .button {
    position: static;
    align-self: center;
    margin-top: clamp(2.5rem, 12vh, 6rem);
    margin-bottom: max(0.75rem, env(safe-area-inset-bottom, 0px));
    width: auto;
    margin-left: auto;
    margin-right: auto;
    min-height: 44px;
    min-width: 0;
    padding: 4px 10px;
    font-size: clamp(24px, 4vw, 40px);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    box-shadow:
      0 50px 100px 0 rgba(0, 0, 0, 0.2),
      0 6px 20px 0 rgba(0, 0, 0, 0.19);
  }
}

.start-shell .txt {
  background: transparent;
  color: white;
  padding: 2px 5px;
  text-align: justify;
}