/**
 * Layout styles
 */

.app-shell {
  min-height: 100vh;
  width: 100%;
  display: flex;
  justify-content: center;
  padding: 20px;
}

.app {
  width: min(100%, var(--container));
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 32px;
}

/* Topbar */
.topbar {
  position: sticky;
  top: 16px;
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: linear-gradient(
    180deg,
    rgba(14, 22, 38, 0.84),
    rgba(14, 22, 38, 0.72)
  );
  backdrop-filter: var(--blur);
  box-shadow: var(--shadow);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: #fff;
  background: linear-gradient(
    135deg,
    rgba(92, 167, 255, 0.22),
    rgba(55, 192, 242, 0.16)
  );
  border: 1px solid rgba(92, 167, 255, 0.22);
}

.brand-copy {
  min-width: 0;
}

.brand-title {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.brand-subtitle {
  font-size: 12px;
  color: var(--muted);
  margin-top: 2px;
}

.topbar-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

/* Main layout */
.layout {
  display: grid;
  grid-template-columns: 390px 1fr;
  gap: 16px;
  min-height: calc(100vh - 112px);
  min-width: 0;
}

/* App shell gets a minimum so elements never crush — horizontal scroll appears instead */
.app-shell {
  min-width: 320px;
}

.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: linear-gradient(
    180deg,
    rgba(14, 22, 38, 0.8),
    rgba(14, 22, 38, 0.66)
  );
  backdrop-filter: var(--blur);
  box-shadow: var(--shadow);
  overflow: hidden;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.screen {
  display: none;
}

.screen.active {
  display: flex;
  flex-direction: column;
  flex: 1 1 0;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}

/* Panel header */
.detail-head {
  padding: 18px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent);
}

.detail-title {
  font-size: 20px;
  font-weight: 850;
  letter-spacing: -0.03em;
}

.detail-subtitle {
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}

.section {
  padding: 18px;
}

.content {
  padding: 18px;
}

/* Editor shell */
.editor-shell {
  display: flex;
  flex-direction: column;
  flex: 1 1 0;
  min-height: 0;
  min-width: 0;
}

/* Tab content: scrolls only when content overflows */
.tab-content {
  flex: 1 1 0;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding-bottom: 8px;
  /* Minimum height so content stays usable */
  min-block-size: 200px;
}

/* Tab panels: hidden by default, shown via JS style.display */
/* Default state — JS sets display:flex when active */
#tab-sources,
#tab-preview,
#tab-export {
  flex-direction: column;
}

/* Responsive */
@media (max-width: 1280px) {
  .layout {
    grid-template-columns: 1fr;
    /* Single column — give it a minimum so it never crushes */
    min-width: 360px;
  }
}

@media (max-width: 720px) {
  .app-shell {
    padding: 12px;
  }

  .topbar {
    top: 12px;
    border-radius: 22px;
    padding: 12px 14px;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
    border-radius: 13px;
  }

  .brand-title {
    font-size: 16px;
  }

  .layout {
    gap: 12px;
  }

  .section,
  .content {
    padding-left: 14px;
    padding-right: 14px;
  }

  .detail-head {
    flex-direction: column;
  }

  .topbar-actions {
    gap: 8px;
  }
}

/* Source item with comment */
.source-item {
  display: grid;
  grid-template-columns: 24px 10px minmax(0, 1fr) auto auto;
  gap: 12px;
  align-items: start;
  padding: 14px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  min-width: 0;
  transition:
    border-color var(--t),
    background var(--t),
    transform var(--t),
    opacity var(--t);
}

.source-info {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.source-comment {
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding: 2px 0;
}

/* Mobile adjustments */
@media (max-width: 720px) {
  .source-item {
    grid-template-columns: 24px 10px minmax(0, 1fr);
    grid-template-areas:
      "drag dot info"
      "drag dot meta"
      ". . actions";
    align-items: start;
  }

  .source-item > .drag-handle {
    grid-area: drag;
    align-self: center;
  }

  .source-item > .source-status {
    grid-area: dot;
    align-self: start;
    margin-top: 4px;
  }

  .source-item > .source-info {
    grid-area: info;
    min-width: 0;
    overflow: hidden;
  }

  .source-item > .badge-type {
    grid-area: meta;
    justify-self: start;
    margin-top: 4px;
  }

  .source-item > .source-actions {
    grid-area: actions;
    justify-content: flex-end;
    margin-top: 4px;
    margin-left: 0;
  }
}

/* ===========================
   Adaptive overflow fixes
   =========================== */

/* Desktop: preview-box and export-value scroll horizontally inside their containers */
.preview-box {
  overflow-x: auto;
  overflow-y: auto;
}

.export-value {
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: thin;
}

.detail-head {
  overflow: hidden;
}

.detail-title,
.detail-subtitle {
  overflow-wrap: break-word;
  word-break: break-word;
  min-width: 0;
}

/* Preview & Export mobile fixes */
@media (max-width: 720px) {
  /* Preview: 2 columns instead of 3 */
  .preview-grid {
    grid-template-columns: 1fr 1fr;
  }

  /* preview-box: allow horizontal scroll internally */
  .preview-box {
    max-width: 100%;
    overflow-x: auto;
  }

  /* Export box: truncate correctly */
  .export-box {
    min-width: 0;
    overflow: hidden;
  }

  .export-value {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  /* Export actions: 2 cols, last full width */
  .export-actions {
    grid-template-columns: 1fr 1fr;
  }

  .export-actions .btn:last-child {
    grid-column: 1 / -1;
  }

  /* Tabs: smaller on phone */
  .tabs {
    padding: 12px 14px 0;
    gap: 6px;
  }

  .tab {
    height: 38px;
    padding: 0 12px;
    font-size: 13px;
  }
}

/* Extra-small screens */
@media (max-width: 400px) {
  /* Preview: stack to 1 column */
  .preview-grid {
    grid-template-columns: 1fr;
  }

  .preview-value {
    font-size: 22px;
  }

  /* Export: stack all buttons */
  .export-actions {
    grid-template-columns: 1fr;
  }

  .export-actions .btn:last-child {
    grid-column: auto;
  }
}

/* Toolbar wraps on very small screens */
@media (max-width: 360px) {
  .toolbar {
    flex-direction: column;
    align-items: stretch;
  }
  .toolbar .btn {
    width: 100%;
    justify-content: center;
  }
}

/* ===========================
   Desktop production fixes
   =========================== */

@media (min-width: 769px) {
  /* Editor panel: min-width so items never get crushed, max-width for readability */
  #screen-editor {
    overflow: hidden;
    min-width: 0;
  }

  /* detail-head action buttons must never wrap or overflow */
  .detail-head > div:last-child {
    flex-shrink: 0;
  }

  /* Tabs bar: scrollable, never pushes the panel wider */
  .tabs {
    flex-shrink: 0;
    overflow-x: auto;
    overflow-y: hidden;
  }

  /* tab-content area: scrolls internally on desktop */
  .tab-content {
    overflow-y: auto;
    overflow-x: hidden;
    flex: 1 1 0;
  }

  /* Export tab: value is scrollable horizontally */
  .export-box {
    overflow: hidden;
    min-width: 0;
  }

  #tab-export {
    overflow-y: auto;
    overflow-x: hidden;
  }

  .copy-btn {
    flex-shrink: 0;
  }
}

/* Screen-list scrolls internally on desktop */
@media (min-width: 769px) {
  #screen-list {
    overflow-y: auto;
    overflow-x: hidden;
  }
}

/* ── About popup ─────────────────────────────────────────────────────────── */
.brand-mark {
  /* Make it behave as a button while keeping existing visual */
  cursor: pointer;
  background: linear-gradient(
    135deg,
    rgba(92, 167, 255, 0.22),
    rgba(55, 192, 242, 0.16)
  );
  border: 1px solid rgba(92, 167, 255, 0.22);
  color: #fff;
  font-weight: 800;
  letter-spacing: -0.04em;
  transition: background var(--t), border-color var(--t);
  position: relative;
}

.brand-mark:hover {
  background: linear-gradient(
    135deg,
    rgba(92, 167, 255, 0.34),
    rgba(55, 192, 242, 0.26)
  );
  border-color: rgba(92, 167, 255, 0.4);
}

.about-popup {
  position: fixed; /* initial value; JS overrides top/left every frame */
  z-index: 120;
  min-width: 210px;
  padding: 14px 16px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: linear-gradient(
    180deg,
    rgba(16, 24, 40, 0.98),
    rgba(13, 21, 35, 0.98)
  );
  backdrop-filter: var(--blur);
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transform: scale(0.96) translateY(-6px);
  transform-origin: top left;
  transition:
    opacity var(--t),
    transform var(--t);
}

.about-popup.open {
  opacity: 1;
  pointer-events: auto;
  transform: scale(1) translateY(0);
}

.about-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

.about-version {
  font-size: 12px;
  color: var(--muted);
  margin-top: 2px;
  margin-bottom: 12px;
}

.about-links {
  display: flex;
  gap: 6px;
}

.about-link {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 1px solid var(--line);
  color: var(--muted);
  background: rgba(255, 255, 255, 0.03);
  text-decoration: none;
  transition:
    color var(--t),
    background var(--t),
    border-color var(--t);
}

.about-link:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(92, 167, 255, 0.35);
}

/* brand wrapper needs relative so popup positions off it */
.brand {
  position: relative;
}

/* ═══════════════════════════════════════════════════════════════
   MOBILE: undo all fixed-height scroll-traps — page scrolls instead
   ═══════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
  /* Layout must not have a fixed min-height on mobile */
  .layout {
    min-height: 0 !important;
  }

  /* tab-content: remove the 200px floor and internal scroll */
  .tab-content {
    min-block-size: 0 !important;
    overflow: visible !important;
    flex: none !important;
    height: auto !important;
    /* Ensure content inside doesn't bleed out */
    width: 100%;
    box-sizing: border-box;
  }

  /* editor-shell: don't flex-fill, just wrap content */
  .editor-shell {
    flex: none !important;
    overflow: visible !important;
    width: 100%;
    box-sizing: border-box;
  }

  /* Screens don't scroll internally on mobile */
  .screen.active {
    overflow: visible !important;
    flex: none !important;
    height: auto !important;
    min-height: 0 !important;
  }

  /* Desktop-only overrides: disable on mobile */
  #screen-list,
  #screen-editor,
  #tab-export {
    overflow: visible !important;
  }

  /* Panel itself must not clip content */
  .panel {
    overflow: visible !important;
    height: auto !important;
  }

  /* Export grid and blocks: full width, no overflow */
  .export-grid {
    width: 100%;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .export-block {
    width: 100%;
    box-sizing: border-box;
    overflow: hidden;
  }
}