/* Clean Theme Builder: the app itself, drawn like a Thunderbird window.
 * The --app-* colours are set from the theme being built (main.js), so the
 * whole page follows the design as it changes. */

:root {
  color-scheme: light;
  --app-chrome: #f0f0f3;
  --app-content: #ffffff;
  --app-line: #e4e4e8;
  --app-text: #1d1d1f;
  --app-text-2: #6e6e73;
  --app-accent: #0061e0;
  --app-accent-text: #ffffff;
  --app-hover: color-mix(in srgb, var(--app-text) 6%, transparent);
  --app-pill: color-mix(in srgb, var(--app-accent) 16%, var(--app-chrome));
  --app-field: var(--app-content);
  --app-field-border: color-mix(in srgb, var(--app-line), var(--app-text) 12%);
  --app-radius: 7px;
  --app-font: system-ui, -apple-system, "Segoe UI", sans-serif;

  font: 14px/1.4 var(--app-font);
}

:root[data-scheme="dark"] {
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

/* Elements with their own display (grid, flex) still hide. */
[hidden] {
  display: none !important;
}

html,
body {
  margin: 0;
  block-size: 100%;
}

body {
  background-color: var(--app-chrome);
  color: var(--app-text);
}

button,
input,
select {
  font: inherit;
  color: inherit;
}

/* ---------- Window ---------- */
.app-window {
  display: flex;
  flex-direction: column;
  block-size: 100dvh;
}

.app-toolbar {
  flex: none;
  display: flex;
  align-items: center;
  gap: 12px;
  min-block-size: 52px;
  padding: 8px 16px;
  background-color: var(--app-chrome);
}

.app-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 15px;

  & svg {
    color: var(--app-accent);
  }
}

/* Builder / Gallery tabs, like Thunderbird's tab strip */
.app-tabs {
  display: flex;
  gap: 4px;
  margin-inline-start: 18px;

  & a {
    display: inline-flex;
    align-items: center;
    min-block-size: 32px;
    padding: 4px 14px;
    border-radius: var(--app-radius);
    color: inherit;
    text-decoration: none;

    &:hover {
      background-color: var(--app-hover);
    }

    &[aria-current="true"] {
      background-color: var(--app-content);
      box-shadow: 0 0 0 1px var(--app-line);
      font-weight: 600;
    }

    &:focus-visible {
      outline: 2px solid var(--app-accent);
    }
  }
}

.app-actions {
  margin-inline-start: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.kofi-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-inline-start: auto;
  padding: 4px 10px;
  border-radius: var(--app-radius);
  background-color: #ff5e5b;
  color: #fff;
  text-decoration: none;
  font-size: 12px;
  font-weight: 600;
  transition: background-color .15s;

  &:hover {
    background-color: #e54542;
  }
}


.app-body {
  flex: 1;
  min-block-size: 0;
  display: grid;
  grid-template-columns: 210px 340px minmax(0, 1fr);
}

/* ---------- Section list (like the folder pane) ---------- */
.app-sections {
  overflow: auto;
  padding: 6px 0 16px;
  background-color: var(--app-chrome);
}

.section-item {
  display: flex;
  align-items: center;
  gap: 10px;
  inline-size: calc(100% - 16px);
  min-block-size: 32px;
  margin-inline: 8px;
  padding: 4px 10px;
  border: none;
  border-radius: var(--app-radius);
  background: none;
  text-align: start;
  cursor: pointer;

  & svg {
    flex: none;
    inline-size: 17px;
    block-size: 17px;
    color: var(--app-accent);
  }

  &:hover {
    background-color: var(--app-hover);
  }

  &[aria-current="true"] {
    background-color: var(--app-pill);
    font-weight: 600;
  }

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

/* ---------- Settings (like Thunderbird's settings pane) ---------- */
.app-settings {
  overflow: auto;
  padding: 18px 20px 28px;
  background-color: var(--app-content);
  border-inline-end: 1px solid var(--app-line);
}

.settings-title {
  margin: 0 0 4px;
  font-size: 18px;
  font-weight: 600;
}

.settings-intro {
  margin: 0 0 16px;
  color: var(--app-text-2);
  font-size: 13px;
}

.control {
  display: grid;
  gap: 6px;
  min-inline-size: 0;
  margin-block-end: 16px;

  &[hidden] {
    display: none;
  }
}

.control-label {
  font-size: 13px;
  font-weight: 600;
}

.control-heading {
  margin: 22px 0 10px;
  padding-block-start: 14px;
  border-block-start: 1px solid var(--app-line);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--app-text-2);
}

.control-note {
  margin: -6px 0 16px;
  font-size: 12.5px;
  color: var(--app-text-2);
}

/* Segmented buttons */
.segmented {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  padding: 2px;
  border-radius: 8px;
  background-color: var(--app-chrome);

  & button {
    flex: 1 1 auto;
    min-block-size: 30px;
    padding: 4px 10px;
    border: none;
    border-radius: 6px;
    background: none;
    font-size: 13px;
    cursor: pointer;

    &:hover {
      background-color: var(--app-hover);
    }

    &[aria-pressed="true"] {
      background-color: var(--app-content);
      box-shadow: 0 0 0 1px var(--app-line), 0 1px 2px rgba(0, 0, 0, 0.08);
      font-weight: 600;
    }

    &:focus-visible {
      outline: 2px solid var(--app-accent);
    }
  }
}

/* Colour */
.color-row {
  display: flex;
  align-items: center;
  gap: 8px;

  & input[type="color"] {
    flex: none;
    inline-size: 40px;
    block-size: 30px;
    padding: 2px;
    border: 1px solid var(--app-field-border);
    border-radius: 6px;
    background-color: var(--app-field);
    cursor: pointer;
  }

  & input[type="text"] {
    inline-size: 100px;
    font-family: ui-monospace, "SF Mono", monospace;
    font-size: 13px;
  }
}

.color-row .control-label {
  flex: 1;
  font-weight: normal;
}

/* Text */
.tb-input {
  inline-size: 100%;
  min-block-size: 32px;
  padding: 5px 9px;
  border: 1px solid var(--app-field-border);
  border-radius: 6px;
  background-color: var(--app-field);

  &:focus {
    outline: 2px solid var(--app-accent);
    outline-offset: -1px;
    border-color: transparent;
  }

  &[aria-invalid="true"] {
    border-color: #d70022;
  }
}

/* Range */
.range-row {
  display: flex;
  align-items: center;
  gap: 10px;

  & input[type="range"] {
    flex: 1;
    accent-color: var(--app-accent);
  }

  & output {
    min-inline-size: 58px;
    text-align: end;
    font-variant-numeric: tabular-nums;
    font-size: 13px;
    color: var(--app-text-2);
  }
}

/* Checkbox */
.tb-check {
  display: inline-flex;
  align-items: flex-start;
  gap: 8px;
  cursor: pointer;

  & input {
    flex: none;
    inline-size: 16px;
    block-size: 16px;
    margin: 2px 0 0;
    accent-color: var(--app-accent);
  }

  &:has(input:disabled) {
    opacity: 0.55;
    cursor: default;
  }
}

/* Font list */
.font-list {
  display: grid;
  gap: 4px;
  max-block-size: 320px;
  overflow: auto;
  padding: 4px;
  border: 1px solid var(--app-field-border);
  border-radius: 8px;
  background-color: var(--app-field);
}

.font-option {
  display: grid;
  gap: 2px;
  padding: 8px 10px;
  border: none;
  border-radius: 6px;
  background: none;
  text-align: start;
  cursor: pointer;

  &:hover {
    background-color: var(--app-hover);
  }

  &[aria-selected="true"] {
    background-color: var(--app-pill);
  }

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

  & .font-name {
    font-size: 15px;
  }

  & .font-sample {
    font-size: 13px;
    color: var(--app-text-2);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  & .font-note {
    font-family: var(--app-font);
    font-size: 11.5px;
    color: var(--app-text-2);
  }
}

/* Theme ID */
.theme-id {
  padding: 8px 10px;
  border-radius: 6px;
  background-color: var(--app-chrome);
  font-family: ui-monospace, "SF Mono", monospace;
  font-size: 12.5px;
  overflow-wrap: anywhere;
}

/* Presets */
.preset-grid {
  display: grid;
  gap: 10px;
}

.preset-card {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 12px;
  align-items: center;
  padding: 10px;
  border: 1px solid var(--app-line);
  border-radius: 10px;
  background-color: var(--app-content);
  text-align: start;
  cursor: pointer;

  &:hover {
    border-color: var(--app-accent);
  }

  &:focus-visible {
    outline: 2px solid var(--app-accent);
  }

  & strong {
    display: block;
    margin-block-end: 2px;
  }

  & span {
    font-size: 12.5px;
    color: var(--app-text-2);
  }
}

/* A tiny drawing of the preset's window */
.preset-swatch {
  display: grid;
  grid-template-columns: 7px 16px 1fr 1fr;
  grid-template-rows: 9px 1fr;
  inline-size: 64px;
  block-size: 46px;
  overflow: hidden;
  border-radius: 5px;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.12);

  & i {
    display: block;
  }

  & .sw-top {
    grid-column: 2 / -1;
  }

  & .sw-spaces {
    grid-row: 1 / -1;
  }
}

/* ---------- Buttons ---------- */
.tb-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-block-size: 32px;
  padding: 5px 14px;
  border: 1px solid var(--app-field-border);
  border-radius: 6px;
  background-color: var(--app-content);
  cursor: pointer;
  text-decoration: none;

  &:hover {
    background-color: color-mix(in srgb, var(--app-content), var(--app-text) 5%);
  }

  &:focus-visible {
    outline: 2px solid var(--app-accent);
    outline-offset: 1px;
  }

  &.primary {
    border-color: transparent;
    background-color: var(--app-accent);
    color: var(--app-accent-text);
    font-weight: 600;

    &:hover {
      background-color: color-mix(in srgb, var(--app-accent), black 10%);
    }
  }
}

/* ---------- Preview stage ---------- */
.app-stage {
  min-inline-size: 0;
  display: flex;
  flex-direction: column;
  background-color: color-mix(in srgb, var(--app-chrome), var(--app-text) 4%);
}

.stage-bar {
  flex: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
  padding: 10px 18px;
  font-size: 13px;
}

.stage-title {
  font-weight: 600;
}

.stage-hint {
  margin-inline-start: auto;
  color: var(--app-text-2);
  font-size: 12.5px;
}

.stage-frame {
  flex: 1;
  min-block-size: 0;
  padding: 0 18px 18px;
}

.stage-frame iframe {
  display: block;
  inline-size: 100%;
  block-size: 100%;
  min-block-size: 480px;
  border: none;
  border-radius: 10px;
  background-color: var(--app-content);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.1), 0 12px 32px rgba(0, 0, 0, 0.18);
}

/* ---------- Build dialog ---------- */
.tb-dialog {
  inline-size: min(560px, calc(100vw - 32px));
  padding: 22px 24px 18px;
  border: none;
  border-radius: 12px;
  background-color: var(--app-content);
  color: var(--app-text);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);

  &::backdrop {
    background-color: rgba(0, 0, 0, 0.35);
  }

  & h2 {
    margin: 0 0 12px;
    font-size: 18px;
  }

  & ol {
    margin: 8px 0 0;
    padding-inline-start: 20px;
    font-size: 13.5px;
  }

  & li {
    margin-block-end: 4px;
  }
}

.download-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-block: 6px 16px;
  padding: 14px;
  border-radius: 10px;
  background-color: var(--app-chrome);

  & .file-info {
    display: grid;
    font-size: 13px;

    & small {
      color: var(--app-text-2);
    }
  }

  & .tb-button {
    margin-inline-start: auto;
  }
}

.message-list {
  margin: 0 0 14px;
  padding: 10px 14px 10px 32px;
  border-radius: 8px;
  font-size: 13px;

  &.errors {
    background-color: color-mix(in srgb, #d70022 12%, var(--app-content));
  }

  &.warnings {
    background-color: color-mix(in srgb, #e8a33d 18%, var(--app-content));
  }
}

.dialog-buttons {
  display: flex;
  justify-content: flex-end;
  margin-block-start: 16px;
}

/* ---------- Gallery ---------- */
.app-gallery {
  flex: 1;
  min-block-size: 0;
  overflow: auto;
  padding: 22px 28px 40px;
  background-color: color-mix(in srgb, var(--app-chrome), var(--app-text) 4%);
}

.gallery-head,
.design-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px 24px;
  margin-block-end: 14px;
}

.gallery-title {
  margin: 0 0 4px;
  font-size: 24px;
  font-weight: 650;
  overflow-wrap: anywhere;
}

.gallery-intro {
  margin: 0;
  max-inline-size: 60ch;
  color: var(--app-text-2);
}

.gallery-search {
  inline-size: min(360px, 100%);
  min-block-size: 38px;
  padding-inline: 12px;
  border-radius: 19px;
}

.gallery-count {
  margin: 0 0 14px;
  min-block-size: 1.4em;
  font-size: 13px;
  color: var(--app-text-2);
}

.gallery-message {
  padding: 40px 16px;
  text-align: center;
  color: var(--app-text-2);
}

/* Photo-gallery grid: large pictures, caption on the picture */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(320px, 100%), 1fr));
  gap: 22px;
}

.photo {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: 12px;
  background-color: var(--app-content);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.08), 0 6px 18px rgba(0, 0, 0, 0.12);
  color: #ffffff;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease;

  &:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.08), 0 14px 30px rgba(0, 0, 0, 0.2);
  }

  &:focus-visible {
    outline: 3px solid var(--app-accent);
    outline-offset: 3px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .photo {
    transition: none;

    &:hover {
      transform: none;
    }
  }
}

.photo-frame {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: color-mix(in srgb, var(--app-chrome), var(--app-text) 6%);

  & iframe {
    position: absolute;
    inset: 0 auto auto 0;
    border: none;
    transform-origin: 0 0;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.25s ease;
  }

  &.ready iframe {
    opacity: 1;
  }

  &.large {
    border-radius: 12px;
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.1), 0 12px 32px rgba(0, 0, 0, 0.18);

    & iframe {
      pointer-events: auto;
    }
  }
}

.photo-caption {
  position: absolute;
  inset: auto 0 0;
  display: grid;
  gap: 2px;
  padding: 36px 16px 12px;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.72), rgba(0, 0, 0, 0.35) 60%, transparent);
  pointer-events: none;
}

.photo-name {
  font-size: 16px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.photo-author {
  font-size: 13px;
  opacity: 0.88;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.gallery-sort {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-block-end: 8px;
  font-size: 13px;
  color: var(--app-text-2);
}

.sort-btn {
  font-size: 12.5px;
  padding: 3px 10px;
  border-radius: 99px;
  opacity: 0.7;

  &[aria-pressed="true"] {
    opacity: 1;
    background: var(--app-accent);
    color: #fff;
  }
}

.photo-votes {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 12px;
  opacity: 0.75;
}

.like-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.like-btn.liked {
  background: var(--app-accent);
  color: #fff;
}

.gallery-more {
  display: flex;
  margin: 26px auto 0;
}

/* One design */
.back-link {
  display: inline-block;
  margin-block-end: 12px;
  color: var(--app-accent);
  text-decoration: none;

  &:hover {
    text-decoration: underline;
  }
}

.design-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  margin: 0;
  color: var(--app-text-2);
  font-size: 13.5px;
}

.design-id {
  font-family: ui-monospace, "SF Mono", monospace;
  font-size: 12px;
}

.design-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.design-status,
.design-own {
  margin: 0 0 12px;
  font-size: 13px;
  color: var(--app-text-2);
}

.tb-button.danger {
  color: #c50f1f;
}

.claim-key {
  margin: 0 0 12px;
}

.claim-key-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-block-start: 6px;

  & input {
    max-inline-size: 320px;
    flex: 1;
  }
}

.claim-result {
  font-size: 13px;
  color: var(--app-text-2);
}

/* Publish, in the build dialog */
.publish {
  margin-block-start: 18px;
  padding-block-start: 14px;
  border-block-start: 1px solid var(--app-line);

  & h3 {
    margin: 0 0 4px;
  }

  & .control-note {
    margin: 0 0 12px;
  }
}

.publish-fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 12px;
}

.publish-result {
  margin-block-start: 10px;
  font-size: 13.5px;

  & p {
    margin: 0 0 8px;
  }

  & a {
    color: var(--app-accent);
  }
}

.edit-link {
  font-family: ui-monospace, "SF Mono", monospace;
  font-size: 12px;
}

.publish-keys {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 10px;
  align-items: center;
  margin-block-start: 8px;
}

.publish-key-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--app-text-2);
}

.save-key-btn {
  margin-block-start: 10px;
  display: inline-block;
  text-decoration: none;
}

/* ---------- Narrow screens ---------- */
@media (max-width: 1100px) {
  .app-body {
    grid-template-columns: 190px minmax(0, 1fr);
    grid-template-rows: auto minmax(520px, 1fr);
    overflow: auto;
  }

  .app-sections {
    grid-row: 1;
  }

  .app-settings {
    grid-row: 1;
    border-inline-end: none;
  }

  .app-stage {
    grid-column: 1 / -1;
  }
}

@media (max-width: 700px) {
  .app-gallery {
    padding-inline: 16px;
  }

  .publish-fields {
    grid-template-columns: 1fr;
  }

  .app-tabs {
    margin-inline-start: 0;
  }

  /* The page scrolls as a whole instead of fitting into one screen. */
  .app-window {
    block-size: auto;
    min-block-size: 100dvh;
  }

  .app-sections,
  .app-settings {
    flex: none;
    overflow-y: visible;
  }

  .app-toolbar {
    flex-wrap: wrap;
    padding-inline: 16px;
  }

  .app-actions {
    margin-inline-start: 0;
    inline-size: 100%;

    & .tb-button {
      flex: 1;
    }
  }

  .app-body {
    display: flex;
    flex-direction: column;
  }

  .app-sections {
    display: flex;
    gap: 4px;
    overflow-x: auto;
    padding: 6px 16px;
  }

  .section-item {
    flex: none;
    inline-size: auto;
    margin: 0;
  }

  .app-settings {
    padding-inline: 16px;
  }

  .app-stage {
    flex: none;
    block-size: 640px;
  }

  .stage-bar,
  .stage-frame {
    padding-inline: 16px;
  }

  .stage-hint {
    margin-inline-start: 0;
  }
}