/*
 * slides.css — Slide deck layout & slide page styles
 * Only for the design.tyyi.net slide deck presentation
 */

/* ── Parent (index.html) layout ── */
html, body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.8;
}
body:not(.slide-page) {
  overflow: hidden;
  height: 100%;
}

:root {
  color-scheme: light;
  accent-color: var(--color-primary);
}
:root.dark-theme,
:root:has(#theme-toggle:checked) {
  color-scheme: dark;
}

/* ── Iframe ── */
#slide-frame {
  display: block;
  width: 100%;
  height: 100vh;
  border: none;
  opacity: 0;
  transition: opacity .25s ease;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}
#slide-frame.ready {
  opacity: 1;
}

/* ── Navigation controls ── */
[role="region"] {
  position: fixed;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 9999px;
  padding: 4px 8px;
  z-index: 100;
  font-size: 11px;
}
[role="region"] button {
  all: unset;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 14px;
  color: var(--color-text-muted);
  transition: background .2s, color .2s;
}
[role="region"] button:hover {
  background: color-mix(in srgb, var(--color-primary), transparent 80%);
  color: var(--color-primary);
}
[role="region"] button:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
[role="tablist"] {
  display: none;
  gap: 4px;
  list-style: none;
}
[role="tablist"] li {
  list-style: none;
}
[role="tab"] {
  all: unset;
  display: block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-border);
  cursor: pointer;
  transition: background .3s, transform .2s;
}
[role="tab"][aria-selected="true"] {
  background: var(--color-primary);
  transform: scale(1.3);
}
[role="tab"]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

@media (min-width: 480px) {
  [role="region"] {
    gap: 8px;
    padding: 6px 12px;
    font-size: 12px;
  }
  [role="region"] button {
    width: 32px;
    height: 32px;
    font-size: 18px;
  }
  [role="tablist"] {
    display: flex;
    gap: 6px;
  }
  [role="tab"] {
    width: 8px;
    height: 8px;
  }
}

/* ── Theme toggle on first slide (parent only) ── */
#theme-toggle {
  appearance: none;
  -webkit-appearance: none;
  width: 44px;
  height: 24px;
  border: none;
  background: var(--color-border);
  border-radius: 9999px;
  cursor: pointer;
  position: relative;
  transition: background .2s;
  flex-shrink: 0;
}
#theme-toggle::before {
  content: '';
  display: block;
  width: 20px;
  height: 20px;
  background: var(--palette-cream);
  border-radius: 50%;
  position: absolute;
  top: 2px;
  left: auto;
  right: 2px;
  box-shadow: 0 1px 3px rgba(0,0,0,.15);
  transition: left .2s, right .2s;
}
#theme-toggle:checked {
  background: var(--color-primary);
}
#theme-toggle:checked::before {
  right: auto;
  left: 2px;
}
#theme-toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ── Child slide page layout ── */
.slide-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 40px 16px;
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.8;
  direction: rtl;
}
.slide-page--center {
  align-items: center;
  text-align: center;
}

.slide-page h2 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 400;
  margin-bottom: 16px;
  color: var(--color-text);
}
.slide-page .slide-desc {
  margin-bottom: 20px;
  font-size: 14px;
  color: var(--color-text-muted);
}
.slide-page .slide-hint {
  margin-top: 24px;
  font-size: 13px;
  color: var(--color-text-faint);
}
.slide-page h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 400;
  margin-bottom: 12px;
}
.slide-page p {
  color: var(--color-text-muted);
}

/* ── Color swatch label/order swap ── */
.color-grid li:nth-child(1) { order: 0; }
.color-grid li:nth-child(2) { order: 1; }
.color-grid li:nth-child(3) { order: 2; }
.color-grid li:nth-child(4) { order: 3; }
.color-grid li:nth-child(5) { order: 4; }
.color-grid li:nth-child(6) { order: 5; }
.color-grid li:nth-child(7) { order: 6; }
.color-grid li:nth-child(1) figure div strong:nth-child(2),
.color-grid li:nth-child(2) figure div strong:nth-child(2) { display: none; }
html.dark-theme .color-grid li:nth-child(1) { order: 1; }
html.dark-theme .color-grid li:nth-child(2) { order: 0; }
html.dark-theme .color-grid li:nth-child(1) figure div strong:nth-child(1),
html.dark-theme .color-grid li:nth-child(2) figure div strong:nth-child(1) { display: none; }
html.dark-theme .color-grid li:nth-child(1) figure div strong:nth-child(2),
html.dark-theme .color-grid li:nth-child(2) figure div strong:nth-child(2) { display: inline; }

/* ── Responsive (mobile-first) ── */
@media (min-width: 480px) {
  .slide-page {
    padding: 48px 24px;
  }
}

@media (min-width: 640px) {
  .slide-page h2 {
    font-size: 26px;
  }
}

@media (max-width: 767px) {
  [role="region"] {
    bottom: auto;
    top: 8px;
    max-width: calc(100% - 16px);
  }
}

@media (min-width: 768px) {
  .slide-page h2 {
    font-size: 28px;
    margin-bottom: 24px;
  }
  [role="region"] {
    bottom: 24px;
    padding: 8px 24px;
    gap: 12px;
    font-size: 13px;
  }
}

@media (min-width: 1024px) {
  .slide-page {
    padding: 80px 48px;
  }
  .slide-page h2 {
    font-size: 28px;
    margin-bottom: 24px;
  }
}