/* ==========================================================================
   Main Studio Layout
   ========================================================================== */
.app-layout {
  display: grid;
  grid-template-columns: 290px minmax(0, 1fr) 290px;
  flex: 1;
  min-height: 0;
  min-width: 0;
  width: 100%;
  max-width: 100vw;
  overflow: hidden;
}

@media (max-width: 1200px) {
  .app-layout {
    grid-template-columns: 275px minmax(0, 1fr) 275px;
  }
}

@media (max-width: 1080px) {
  .app-layout {
    grid-template-columns: 260px minmax(0, 1fr) 260px;
  }
  aside.sidebar-left, aside.sidebar-right {
    padding: 1rem 0.75rem;
  }
}

@media (max-width: 960px) {
  .mobile-tab-nav {
    display: flex;
  }

  .app-layout {
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    overflow-x: hidden;
    flex: 1;
    width: 100%;
    max-width: 100vw;
  }

  /* Show only the active mobile tab panel */
  .app-layout[data-mobile-tab="preview"] aside.sidebar-left,
  .app-layout[data-mobile-tab="preview"] aside.sidebar-right {
    display: none !important;
  }

  .app-layout[data-mobile-tab="design"] main.stage-area,
  .app-layout[data-mobile-tab="design"] aside.sidebar-right {
    display: none !important;
  }

  .app-layout[data-mobile-tab="climbs"] aside.sidebar-left,
  .app-layout[data-mobile-tab="climbs"] main.stage-area {
    display: none !important;
  }

  .app-layout[data-mobile-tab="fueling"] aside.sidebar-left,
  .app-layout[data-mobile-tab="fueling"] main.stage-area {
    display: none !important;
  }

  aside.sidebar-left, aside.sidebar-right {
    border-left: none !important;
    border-right: none !important;
    width: 100% !important;
    max-width: 100% !important;
    padding: 1rem 0.85rem;
    box-sizing: border-box;
  }

  main.stage-area {
    width: 100% !important;
    padding: 1rem 0.75rem;
    box-sizing: border-box;
  }
}

/* Sidebar Styles */
aside.sidebar-left, aside.sidebar-right {
  background: var(--bg-sidebar);
  padding: 1.1rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  overflow-y: auto;
  overflow-x: hidden;
  min-height: 0;
  min-width: 0;
  box-sizing: border-box;
}

aside.sidebar-left {
  border-right: 1px solid var(--border-color);
}

aside.sidebar-right {
  border-left: 1px solid var(--border-color);
}

.tool-section {
  display: flex;
  flex-direction: column;
}

.section-label {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin-bottom: 0.5rem;
}

.section-header-flex {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.4rem;
}

/* Dropzone */
.dropzone {
  border: 1.5px dashed var(--border-color);
  border-radius: 6px;
  padding: 1.1rem 0.75rem;
  text-align: center;
  background: var(--bg-input);
  cursor: pointer;
  position: relative;
  transition: all 0.15s ease;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--accent);
  background: var(--accent-subtle);
}

.dropzone .drop-icon {
  margin-bottom: 0.35rem;
  color: var(--text-dim);
  transition: color 0.15s ease, transform 0.15s ease;
}

.dropzone:hover .drop-icon, .dropzone.dragover .drop-icon {
  color: var(--accent);
  transform: translateY(-2px);
}

.dropzone p {
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--text-primary);
}

.dropzone span {
  font-size: 0.66rem;
  color: var(--text-dim);
}

#file-input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

/* Control Groups & Fields */
.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 0;
  max-width: 100%;
  box-sizing: border-box;
}

.field-label {
  font-size: 0.72rem;
  color: var(--text-secondary);
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.field-value-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--accent);
}

.field-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 0.5rem;
  min-width: 0;
  width: 100%;
  box-sizing: border-box;
}

/* Segmented Pill Groups */
.segmented-pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  background: var(--bg-pill);
  padding: 0.25rem;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  min-width: 0;
  max-width: 100%;
  box-sizing: border-box;
}

.pill-opt {
  flex: 1 1 auto;
  text-align: center;
  font-family: var(--font-sans);
  font-size: 0.71rem;
  font-weight: 500;
  padding: 0.3rem 0.45rem;
  background: transparent;
  color: var(--text-secondary);
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.12s ease;
  user-select: none;
  white-space: nowrap;
  min-width: 0;
  max-width: 100%;
}

.pill-opt:hover:not(.active) {
  background: var(--bg-pill-hover);
  color: var(--text-primary);
}

.pill-opt.active {
  background: var(--bg-pill-active);
  color: var(--text-pill-active);
  font-weight: 600;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.12);
}

/* Stepper Input */
.stepper-wrap {
  position: relative;
  display: flex;
  align-items: center;
  min-width: 0;
  width: 100%;
  box-sizing: border-box;
}

.stepper-wrap input {
  padding-right: 28px;
  min-width: 0;
  width: 100%;
}

.stepper-unit {
  position: absolute;
  right: 8px;
  font-size: 0.68rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
  pointer-events: none;
}

input[type="text"], input[type="number"], select {
  width: 100%;
  min-width: 0;
  max-width: 100%;
  box-sizing: border-box;
  padding: 0.38rem 0.55rem;
  font-family: var(--font-sans);
  font-size: 0.77rem;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.12s, box-shadow 0.12s;
}

select {
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
}

input[type="text"]:hover, input[type="number"]:hover, select:hover {
  background: var(--bg-input-hover);
  border-color: var(--border-hover);
}

input[type="text"]:focus, input[type="number"]:focus, select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-subtle);
  background: var(--bg-input);
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 2px;
  background: var(--border-color);
  outline: none;
  margin: 0.4rem 0;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid #ffffff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
  cursor: pointer;
  transition: transform 0.1s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

/* Checkbox Grid */
.checkbox-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 0.4rem 0.5rem;
  min-width: 0;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.72rem;
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
  min-width: 0;
}

.checkbox-row span {
  min-width: 0;
  line-height: 1.25;
  word-break: break-word;
}

.checkbox-row input {
  cursor: pointer;
  accent-color: var(--accent);
  width: 13px;
  height: 13px;
  flex-shrink: 0;
}

.checkbox-row:hover span {
  color: var(--text-primary);
}


/* ==========================================================================
   App Footer
   ========================================================================== */
.app-footer {
  flex-shrink: 0;
  padding: 0.25rem 1rem;
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-header);
  color: var(--text-secondary);
  font-size: 0.75rem;
  text-align: center;
}

.app-footer a {
  color: inherit;
  text-decoration: underline;
}