/* Phone portrait overrides. The existing landscape styles stay in their original files. */
#mobile-header, #mobile-backdrop, #mobile-nav-close { display: none; }
#mobile-header[hidden], #mobile-backdrop[hidden], #mobile-nav-close[hidden] { display: none !important; }

html[data-mobile-portrait] {
  --mobile-header-height: 140px;
  --mobile-portrait-height: 100px;
  overflow: hidden;
}
html[data-mobile-portrait][data-mobile-compact] {
  --mobile-header-height: 88px;
  --mobile-portrait-height: 50px;
}
html[data-mobile-portrait] body {
  position: fixed;
  top: var(--mobile-top, 0px);
  left: 0;
  width: 100%;
  height: var(--mobile-height, 100dvh);
  display: grid;
  grid-template-rows: calc(var(--mobile-header-height) + env(safe-area-inset-top, 0px)) minmax(0, 1fr);
  grid-template-columns: minmax(0, 1fr);
  overflow: hidden;
}
html[data-mobile-portrait] #mobile-header {
  display: flex;
  position: relative;
  grid-row: 1;
  align-items: flex-end;
  justify-content: center;
  padding: 0 72px 8px;
  z-index: 2;
}
html[data-mobile-portrait] .mobile-name {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 30px;
  padding: 4px 15px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--side);
  color: var(--text);
  font-size: 16px;
  font-weight: 600;
  font-family: inherit;
  line-height: 22px;
  cursor: pointer;
  touch-action: manipulation;
}
html[data-mobile-portrait] #mobile-menu,
html[data-mobile-portrait] #mobile-new-chat,
html[data-mobile-portrait] #mobile-nav-close {
  display: flex;
  position: absolute;
  top: calc(12px + env(safe-area-inset-top, 0px));
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--side);
  color: var(--text);
  padding: 0;
  cursor: pointer;
  touch-action: manipulation;
}
html[data-mobile-portrait] #mobile-menu { left: 14px; }
html[data-mobile-portrait] #mobile-new-chat { right: 14px; }
html[data-mobile-portrait] #mobile-nav-close { top: 12px; right: 10px; font-size: 27px; }
html[data-mobile-portrait] #stage {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}
html[data-mobile-portrait] #stage .portrait-float {
  top: calc(4px + env(safe-area-inset-top, 0px));
  bottom: auto;
  left: calc(50% - var(--mobile-portrait-height) / 3);
  width: calc(var(--mobile-portrait-height) * 2 / 3);
  height: var(--mobile-portrait-height);
  transform: none;
  animation: none;
}
@keyframes mobile-portrait-breathe {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-3px); }
}
@media (prefers-reduced-motion: no-preference) {
  html[data-mobile-portrait] #stage .portrait-float { animation: mobile-portrait-breathe 6s ease-in-out infinite; }
}
html[data-mobile-portrait][data-mobile-portrait-expanded] {
  --mobile-expanded-chat-height: clamp(180px, calc(var(--mobile-height, 100dvh) * .4), 360px);
  --mobile-portrait-height: max(100px, calc(var(--mobile-layout-height, 100svh) - clamp(124px, calc(var(--mobile-layout-height, 100svh) * .22), 184px) - 60px - env(safe-area-inset-top, 0px)));
}
html[data-mobile-portrait][data-mobile-portrait-expanded] body {
  grid-template-rows: minmax(56px, 1fr) minmax(0, min(var(--mobile-expanded-chat-height), calc(var(--mobile-height, 100dvh) - 56px)));
}
html[data-mobile-portrait][data-mobile-portrait-expanded] #mobile-header {
  align-items: flex-start;
  padding-top: calc(8px + env(safe-area-inset-top, 0px));
}
html[data-mobile-portrait][data-mobile-portrait-expanded] #stage .portrait-float {
  top: calc(48px + env(safe-area-inset-top, 0px));
}
html[data-mobile-portrait][data-mobile-portrait-expanded] #app {
  padding-top: 8px;
  border-top: 1px solid var(--line);
  border-radius: 20px 20px 0 0;
  background: var(--side);
}
html[data-mobile-portrait] #app {
  grid-row: 2;
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  min-width: 0;
  min-height: 0;
  padding: 0 12px max(10px, env(safe-area-inset-bottom, 0px));
}
html[data-mobile-portrait] #thread {
  min-width: 0;
  min-height: 0;
  max-width: none;
  padding: 8px 2px 14px;
  overscroll-behavior-y: contain;
  -webkit-overflow-scrolling: touch;
}
html[data-mobile-portrait] #hello { margin-top: clamp(16px, calc(var(--mobile-height, 100dvh) * .09), 80px); }
html[data-mobile-portrait] #hello .hi { font-size: 32px; }
html[data-mobile-portrait] #hello .sub { max-width: 270px; margin: 8px auto 0; font-size: 15px; line-height: 1.6; }
html[data-mobile-portrait] .user-pill { max-width: 88%; border-radius: 20px 20px 5px 20px; }
html[data-mobile-portrait] .bot-card { max-width: 94%; min-width: 0; border-radius: 20px; }
html[data-mobile-portrait] .think-card { max-width: 94%; }
html[data-mobile-portrait] .bot-body { padding: 12px 15px; }
html[data-mobile-portrait] .bot-foot { font-size: 12px; }
html[data-mobile-portrait] #composer {
  width: 100%;
  max-width: none;
  flex-shrink: 0;
  min-height: 54px;
  margin: 0;
  padding: 8px 8px 8px 16px;
  gap: 8px;
  border: 1px solid var(--line);
}
html[data-mobile-portrait] #input { min-width: 0; font-size: 16px; max-height: 120px; }
html[data-mobile-portrait] #send { width: 40px; height: 40px; }
html[data-mobile-portrait] #stop { min-height: 40px; }
html[data-mobile-portrait] #lock-banner { width: 100%; font-size: 14px; flex-shrink: 0; }
html[data-mobile-portrait] #sidebar {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 30;
  width: min(300px, 86vw);
  height: 100%;
  min-height: 0;
  padding-top: max(12px, env(safe-area-inset-top, 0px));
  padding-bottom: max(12px, env(safe-area-inset-bottom, 0px));
  transform: translateX(-100%);
  visibility: hidden;
  box-shadow: 8px 0 30px rgba(0, 0, 0, .18);
}
html[data-mobile-portrait][data-mobile-menu-open] #sidebar { transform: none; visibility: visible; }
html[data-mobile-portrait] #sidebar .brand { padding-right: 48px; min-height: 52px; }
html[data-mobile-portrait] #hist { min-height: 0; }
html[data-mobile-portrait] #hist li { min-height: 44px; }
html[data-mobile-portrait] #new-chat, html[data-mobile-portrait] #gear { min-height: 44px; }
html[data-mobile-portrait] #mobile-backdrop {
  display: block;
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 25;
  border: 0;
  background: rgba(0, 0, 0, .36);
}
html[data-mobile-portrait] #modal { position: absolute; z-index: 40; padding: 12px; }
html[data-mobile-portrait] .sheet { width: min(420px, 100%); max-height: 100%; padding: 18px; overflow-y: auto; overscroll-behavior: contain; }
html[data-mobile-portrait] .sheet select, html[data-mobile-portrait] #sys-prompt { font-size: 16px; }
html[data-mobile-portrait] .row-btns button { min-height: 44px; }
html[data-mobile-portrait] button:focus-visible { outline: 2px solid var(--purple-2); outline-offset: 3px; }

/* Tablets and other wide portrait screens: same layout as a phone, with a bigger portrait and one centred column. */
@media (min-width: 700px) {
  html[data-mobile-portrait] { --mobile-header-height: 210px; --mobile-portrait-height: 170px; }
  html[data-mobile-portrait] #app > * { width: 100%; max-width: 780px; margin-left: auto; margin-right: auto; }
  html[data-mobile-portrait] #mobile-header { padding-bottom: 12px; }
}