:root {
  --bg: #efefef;
  --top-band-bg: #4a4a4a;
  --text: #1f1f1f;
  --muted: #666;
  --panel: #ffffff;
  --border: #d4d4d4;
  --button: #242424;
  --button-text: #ffffff;
  --danger: #b42318;
  --focus: #2563eb;
  --header-x: 20px;
  --header-y: 20px;
  --title-top-gap: 88px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  min-height: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
}

.app::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: calc(var(--title-top-gap) - 16px);
  background: var(--top-band-bg);
  z-index: 1;
}

.top-left-brand {
  position: fixed;
  top: var(--header-y);
  left: var(--header-x);
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.app-header-label {
  margin: 0;
  font-size: clamp(1.5rem, 2.6vw, 2.8rem);
  font-weight: 700;
  line-height: 1;
  color: #fff;
}

.top-right-controls {
  position: fixed;
  top: var(--header-y);
  right: var(--header-x);
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.promo-badges {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.promo-badge {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

.promo-badge-github {
  background: #fff;
  border: 1px solid #545454;
  color: #000;
}

.promo-badge-github svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.promo-badge-zeta {
  background: #7bb951;
  border: 1px solid #7bb951;
  color: #fff;
  font-family: "Times New Roman", Times, serif;
  font-size: 1.2rem;
  line-height: 1;
}

.delete-everything-btn {
  border: 1px solid var(--danger);
  background: var(--danger);
  color: #ffffff;
  border-radius: 999px;
  padding: 0.5rem 0.9rem;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
}

.delete-everything-btn:hover {
  background: #9f1f15;
}

.export-prompts-btn {
  border: 1px solid #2f5de0;
  background: #2f5de0;
  color: #ffffff;
  border-radius: 999px;
  padding: 0.5rem 0.9rem;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
}

.export-prompts-btn:hover {
  background: #2448ad;
}

.export-webpage-btn {
  border: 1px solid #2f5de0;
  background: #2f5de0;
  color: #ffffff;
  border-radius: 999px;
  padding: 0.5rem 0.9rem;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
}

.export-webpage-btn:hover {
  background: #2448ad;
}

.project-title-wrap {
  margin-top: var(--title-top-gap);
  display: flex;
  justify-content: center;
  padding: 0 1rem;
}

.project-title {
  width: min(860px, 92vw);
  margin: 0;
  display: block;
  text-align: center;
  font-size: clamp(1.8rem, 3vw, 3rem);
  font-weight: 500;
  cursor: text;
  background: #d2d2d2;
  border-radius: 10px;
  padding: 0.15rem 0.65rem;
}

.project-title-input {
  width: min(860px, 92vw);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: clamp(1.4rem, 2.6vw, 2.4rem);
  padding: 0.25rem 0.5rem;
  text-align: center;
}

.storyboard-layout {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  padding: 1.25rem 0 4.25rem;
}

.storyboard-rail {
  flex: 1;
  min-height: 0;
  overflow-x: auto;
  overflow-y: hidden;
  display: flex;
  align-items: center;
  gap: clamp(1.5rem, 4vw, 4.5rem);
  padding: 0 22vw 0.5rem;
}

.storyboard-rail-empty {
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding-left: 1rem;
  padding-right: 1rem;
}

.tile {
  flex: 0 0 auto;
}

.keyframe-tile {
  width: clamp(260px, 44vw, 680px);
}

.media-frame {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #ddd;
  border: 1px solid #bbb;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-missing {
  color: var(--muted);
  font-size: 0.9rem;
}

.keyframe-caption {
  margin: 0.75rem 0 0;
  text-align: center;
  color: #3b3b3b;
}

.delete-keyframe-btn {
  margin: 0.5rem auto 0;
  display: block;
  border: 1px solid #cc3d3d;
  border-radius: 8px;
  background: #fff;
  color: #9f2626;
  padding: 0.4rem 0.7rem;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
}

.prompt-tile {
  width: clamp(220px, 26vw, 420px);
  align-self: center;
}

.prompt-label {
  display: block;
  margin-bottom: 0.5rem;
  color: #4a4a4a;
  font-weight: 500;
}

.prompt-input {
  width: 100%;
  height: 166px;
  resize: none;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem;
  font: inherit;
}

.copy-prompt-btn {
  margin-top: 0.55rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  color: #2e2e2e;
  padding: 0.42rem 0.7rem;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
}

.add-tile {
  align-self: center;
  text-align: center;
}

.add-label {
  display: block;
  margin-bottom: 0.65rem;
  color: #333;
}

.add-btn {
  width: 46px;
  height: 46px;
  border: none;
  border-radius: 999px;
  font-size: 1.6rem;
  line-height: 1;
  font-weight: 700;
  cursor: pointer;
  background: var(--button);
  color: var(--button-text);
}

.insert-add-tile {
  align-self: center;
  text-align: center;
}

.insert-add-label {
  display: block;
  margin-bottom: 0.45rem;
  color: #4d4d4d;
  font-size: 0.78rem;
}

.insert-add-btn {
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 999px;
  font-size: 1.2rem;
  line-height: 1;
  font-weight: 700;
  cursor: pointer;
  background: var(--button);
  color: var(--button-text);
}

.pagination {
  position: fixed;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  z-index: 4;
  min-height: 34px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0;
  background: rgba(239, 239, 239, 0.92);
  border-radius: 999px;
  padding: 0.25rem 0.5rem;
}

.page-btn {
  border: 1px solid transparent;
  background: transparent;
  color: #444;
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 6px;
  cursor: pointer;
}

.page-btn[aria-current="page"] {
  background: #222;
  color: #fff;
}

.page-gap {
  color: #777;
  font-size: 0.95rem;
}

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

@media (max-width: 760px) {
  :root {
    --header-x: 12px;
    --header-y: 12px;
    --title-top-gap: 84px;
  }

  .delete-everything-btn {
    padding: 0.4rem 0.7rem;
    font-size: 0.8rem;
  }

  .export-prompts-btn {
    padding: 0.4rem 0.7rem;
    font-size: 0.8rem;
  }

  .export-webpage-btn {
    padding: 0.4rem 0.7rem;
    font-size: 0.8rem;
  }

  .storyboard-rail {
    padding-left: 14vw;
    padding-right: 14vw;
  }

  .pagination {
    bottom: 14px;
  }
}