/* ============================================================
   CSS Reset
   ============================================================ */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ============================================================
   Custom Properties (design tokens)
   ============================================================ */

:root {
  --color-bg:            #f8fafc;
  --color-surface:       #ffffff;
  --color-border:        #e2e8f0;
  --color-text:          #1e293b;
  --color-text-muted:    #64748b;

  /* Type badge colours */
  --color-doel:          #7c3aed;   /* purple */
  --color-subdoel:       #2563eb;   /* blue */
  --color-activiteit:    #059669;   /* green */

  /* Incomplete marker */
  --color-incomplete:    #f97316;   /* orange */

  /* Danger */
  --color-danger:        #dc2626;
  --color-danger-hover:  #b91c1c;

  /* Button */
  --color-btn-bg:        #f1f5f9;
  --color-btn-hover:     #e2e8f0;
  --color-btn-border-hover: #cbd5e1;
  --color-btn-primary:   #2563eb;
  --color-btn-primary-hover: #1d4ed8;

  /* Error banner */
  --color-error-bg:      #fee2e2;
  --color-error-text:    #991b1b;
  --color-error-border:  #fca5a5;

  --font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-sm:   0.8125rem; /* 13px */
  --font-size-base: 0.9375rem; /* 15px */
  --radius-sm:  4px;
  --radius-md:  6px;
  --radius-lg:  8px;
  --shadow-sm:  0 1px 3px rgb(0 0 0 / 0.08);
}

/* ============================================================
   Base
   ============================================================ */

html,
body {
  height: 100%;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ============================================================
   Error Banner
   ============================================================ */

#error-banner {
  display: none;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background: var(--color-error-bg);
  color: var(--color-error-text);
  border-bottom: 1px solid var(--color-error-border);
  font-size: var(--font-size-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}

#error-banner.error-banner--visible {
  display: flex;
}

.error-banner__message {
  flex: 1;
}

.error-banner__close {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.1rem;
  color: var(--color-error-text);
  line-height: 1;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.error-banner__close:hover {
  background: var(--color-error-border);
}

/* ── Success banner ──────────────────────────────────────────────────────── */

#success-banner {
  display: flex;
  align-items: center;
  gap: 10px;
  width: max-content;
  min-width: min(280px, calc(100vw - 32px));
  max-width: min(420px, calc(100vw - 32px));
  padding: 12px 12px 12px 14px;
  background: #F0FDF4;
  color: #065F46;
  border: 1px solid #86EFAC;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 24px rgb(15 23 42 / 0.14), 0 2px 6px rgb(15 23 42 / 0.08);
  font-size: var(--font-size-base);
  position: fixed;
  bottom: 16px;
  right: 16px;
  z-index: 300;
  pointer-events: none;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.16s ease, transform 0.16s ease;
}

#success-banner.success-banner--visible {
  pointer-events: auto;
  opacity: 1;
  transform: translateY(0);
}

.success-banner__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  color: #047857;
  background: #D1FAE5;
  border-radius: 50%;
  flex-shrink: 0;
}

.success-banner__icon svg {
  width: 16px;
  height: 16px;
}

.success-banner__message {
  flex: 1;
  line-height: 1.35;
}

.success-banner__close {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.25rem;
  color: #065F46;
  line-height: 1;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.success-banner__close:hover {
  background: #D1FAE5;
}

/* ============================================================
   App Header
   ============================================================ */

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 16px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.app-header__brand {
  display: flex;
  align-items: center;
  padding: 10px 0;
  flex: 0 1 340px;
  min-width: 180px;
}

.app-header__logo {
  display: block;
  width: min(100%, 340px);
  height: auto;
  max-height: 46px;
  object-fit: contain;
}

/* ============================================================
   Project Name
   ============================================================ */

.project-name-wrap {
  flex: 1;
  display: flex;
  justify-content: center;
  padding: 0 16px;
  min-width: 0;
}

.project-name-input {
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 4px 6px;
  width: 100%;
  max-width: 400px;
  text-align: center;
  outline: none;
  transition: border-color 0.12s;
}

.project-name-input::placeholder {
  color: var(--color-text-muted);
  font-weight: 400;
}

.project-name-input:hover {
  border-bottom-color: var(--color-border);
}

.project-name-input:focus {
  border-bottom-color: var(--color-btn-primary);
}

/* ============================================================
   Toolbar
   ============================================================ */

.toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 0;
  flex-shrink: 0;
}

@media (max-width: 900px) {
  .app-header {
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px 12px;
    padding: 6px 12px;
  }

  .app-header__brand {
    flex: 1 1 100%;
    justify-content: center;
    min-width: 0;
    padding: 2px 0 0;
  }

  .app-header__logo {
    width: min(100%, 300px);
    max-height: 40px;
  }

  .project-name-wrap {
    flex: 1 1 100%;
    justify-content: center;
    padding: 0;
  }

  .toolbar {
    flex: 1 1 100%;
    flex-wrap: wrap;
    justify-content: center;
    max-width: 100%;
    padding: 4px 0;
  }

  .lang-switcher {
    flex: 1 1 100%;
    justify-content: center;
    margin-left: 0;
    padding: 4px 0;
    border-left: none;
  }

}

/* ============================================================
   Language Switcher
   ============================================================ */

.lang-switcher {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 0 10px 12px;
  margin-left: 8px;
  border-left: 1px solid var(--color-border);
  flex-shrink: 0;
}

.lang-switcher__group {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.lang-switcher__flag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 22px;
  padding: 0;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  line-height: 0;
  opacity: 0.55;
  transition: opacity 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}

.lang-switcher__flag:hover {
  opacity: 0.9;
}

.lang-switcher__flag:focus {
  outline: none;
  border-color: var(--color-btn-primary);
}

.lang-switcher__flag:focus-visible {
  outline: 2px solid var(--color-btn-primary);
  outline-offset: 1px;
}

.lang-switcher__flag:active {
  transform: scale(0.96);
}

.lang-switcher__flag--active {
  opacity: 1;
  border-color: var(--color-border);
}

.lang-switcher__flag-svg {
  display: block;
  width: 24px;
  height: 16px;
  border-radius: 2px;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.08);
}

@media (max-width: 900px) {
  .lang-switcher {
    padding-top: 4px;
    padding-bottom: 4px;
  }
}

/* ============================================================
   Page Layout  (CSS Grid two-panel)
   ============================================================ */

.app-layout {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-rows: 1fr;
  flex: 1;
  min-height: 0;
  overflow: hidden;
  position: relative;
}

.app-layout--tree-collapsed {
  grid-template-columns: minmax(0, 1fr);
}

.app-layout--tree-collapsed .panel--tree {
  display: none;
}

.app-layout--tree-collapsed .panel--chart {
  grid-column: 1;
}

.app-layout--tree-collapsed .panel--chart .panel__header {
  padding-left: 52px;
}

/* ============================================================
   App Footer
   ============================================================ */

.app-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px 16px;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.75rem;
  flex-shrink: 0;
}

.panel {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.panel--tree {
  border-right: 1px solid var(--color-border);
  background: var(--color-surface);
}

.panel--chart {
  background: var(--color-bg);
}

.panel__header {
  padding: 12px 16px 8px;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.panel__header--with-action {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 8px 8px 16px;
}

.panel__header--chart {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 8px 8px 16px;
}

.panel__header-title-group {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}

.panel__body {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 12px;
}

.panel--chart .panel__body {
  overflow-x: auto;
}

.panel__content--chart {
  display: flex;
  flex: 1;
  min-height: 0;
  overflow: hidden;
  position: relative;
}

/* Stacked layout on narrow viewports */
@media (max-width: 700px) {
  .app-layout {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
  }

  .app-layout--tree-collapsed {
    grid-template-rows: 1fr;
  }

  .panel--tree {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    max-height: 50vh;
  }

  .app-layout--tree-collapsed .panel--chart .panel__header {
    padding-left: 52px;
  }

}

/* ============================================================
   Buttons
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-btn-bg);
  color: var(--color-text);
  font-family: inherit;
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s, box-shadow 0.12s;
  white-space: nowrap;
  line-height: 1;
}

.btn:hover:not(:disabled) {
  background: var(--color-btn-hover);
  border-color: var(--color-btn-border-hover);
}

.btn:focus-visible {
  outline: 2px solid var(--color-btn-primary);
  outline-offset: 2px;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn--toolbar {
  min-height: 32px;
  padding: 7px 14px;
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text);
}

.btn--toolbar:hover:not(:disabled) {
  background: var(--color-btn-bg);
}

.btn--primary {
  min-height: 34px;
  padding: 8px 14px;
  background: var(--color-btn-primary);
  color: #fff;
  border-color: var(--color-btn-primary);
  font-weight: 600;
  box-shadow: 0 1px 2px rgb(37 99 235 / 0.18);
}

.btn--primary:hover:not(:disabled) {
  background: var(--color-btn-primary-hover);
  border-color: var(--color-btn-primary-hover);
  box-shadow: 0 2px 5px rgb(37 99 235 / 0.2);
}

/* Small icon buttons used in tree rows */
.btn--icon {
  padding: 3px 7px;
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
  min-width: 26px;
}

.btn--panel-toggle,
.tree-panel-expander {
  width: 30px;
  height: 30px;
  padding: 0;
  color: var(--color-text-muted);
}

.btn--panel-toggle svg,
.tree-panel-expander svg {
  display: block;
  width: 16px;
  height: 16px;
}

.tree-panel-expander {
  display: none;
  position: absolute;
  top: 5px;
  left: 12px;
  z-index: 2;
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.app-layout--tree-collapsed .tree-panel-expander {
  display: inline-flex;
}

.btn--danger {
  color: var(--color-danger);
  border-color: transparent;
  background: none;
}

.btn--danger:hover:not(:disabled) {
  background: #fee2e2;
  border-color: #fca5a5;
}

/* ============================================================
   Help
   ============================================================ */

body.help-panel-open {
  overflow: hidden;
}

.help-trigger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  padding: 0;
  border: 1px solid #cbd5e1;
  border-radius: 50%;
  background: var(--color-surface);
  color: #334155;
  font-family: inherit;
  line-height: 1;
  cursor: pointer;
  flex-shrink: 0;
  box-shadow: 0 1px 2px rgb(15 23 42 / 0.08);
}

.help-trigger__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 800;
  line-height: 1;
}

.help-trigger:hover:not(:disabled) {
  color: var(--color-text);
  border-color: #94a3b8;
  background: #f8fafc;
  box-shadow: 0 1px 3px rgb(15 23 42 / 0.12);
}

.help-trigger:focus-visible {
  outline: 2px solid var(--color-btn-primary);
  outline-offset: 2px;
}

.help-trigger--inline {
  width: 20px;
  height: 20px;
}

.help-overlay {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  justify-content: flex-end;
  background: rgb(15 23 42 / 0.38);
}

.help-overlay[hidden] {
  display: none;
}

.help-dialog {
  width: min(720px, 100%);
  height: 100%;
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  box-shadow: -8px 0 24px rgb(15 23 42 / 0.18);
}

.help-dialog__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.help-dialog__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
}

.help-dialog__close {
  width: 30px;
  height: 30px;
  padding: 0;
}

.help-dialog__body {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  min-height: 0;
  flex: 1;
}

.help-dialog__nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px;
  border-right: 1px solid var(--color-border);
  background: var(--color-bg);
  overflow-y: auto;
}

.help-dialog__nav-button {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text-muted);
  font-family: inherit;
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}

.help-dialog__nav-button:hover {
  background: var(--color-btn-bg);
  color: var(--color-text);
}

.help-dialog__nav-button:focus-visible {
  outline: 2px solid var(--color-btn-primary);
  outline-offset: 1px;
}

.help-dialog__nav-button--active {
  background: #dbeafe;
  color: #1e40af;
  border-color: #bfdbfe;
}

.help-dialog__content {
  padding: 22px 24px 28px;
  overflow-y: auto;
}

.help-dialog__section-title {
  font-size: 1.25rem;
  line-height: 1.25;
  color: var(--color-text);
  margin-bottom: 10px;
}

.help-dialog__intro {
  color: var(--color-text);
  line-height: 1.55;
  max-width: 56ch;
  margin-bottom: 14px;
}

.help-dialog__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-left: 20px;
  color: var(--color-text);
  line-height: 1.5;
  max-width: 62ch;
}

.help-dialog__list li::marker {
  color: var(--color-btn-primary);
}

.help-dialog__sublist {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding-left: 20px;
  margin-top: 8px;
}

@media (max-width: 700px) {
  .help-dialog {
    width: 100%;
  }

  .help-dialog__body {
    grid-template-columns: 1fr;
    grid-template-rows: auto minmax(0, 1fr);
  }

  .help-dialog__nav {
    flex-direction: row;
    overflow-x: auto;
    overflow-y: hidden;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }

  .help-dialog__nav-button {
    width: auto;
    flex: 0 0 auto;
  }

  .help-dialog__content {
    padding: 18px 16px 24px;
  }
}

/* ============================================================
   Tree Editor
   ============================================================ */

/* Empty state */
.tree__empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 40px 20px;
  text-align: center;
  color: var(--color-text-muted);
}

.tree__empty p {
  font-size: var(--font-size-sm);
  max-width: 240px;
  line-height: 1.5;
}

.tree__empty .btn {
  min-height: 34px;
  padding: 8px 14px;
}

/* Root and nested lists */
ul.tree__root,
ul.tree__children {
  list-style: none;
  padding-left: 0;
}

ul.tree__children {
  padding-left: 20px;
  border-left: 2px solid var(--color-border);
  margin-left: 8px;
  margin-top: 2px;
}

/* Node <li> */
.tree__node {
  padding: 2px 0;
}

/* Node row */
.tree__node-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 5px 6px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: background 0.1s;
}

.tree__node-row:hover {
  background: var(--color-btn-bg);
}

/* Top line: dot + name + badge + actions */
.tree__node-row-main {
  display: flex;
  align-items: center;
  gap: 6px;
  min-height: 28px;
}

/* Second line: omvang + percentage inputs */
.tree__node-row-fields {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-left: 14px;
}

/* Incomplete node: orange left border */
.tree__node--incomplete > .tree__node-row {
  border-left: 3px solid var(--color-incomplete);
  padding-left: 4px;
}

.tree__node--incomplete > .tree__node-row .tree__node-row-main {
  /* ensure main line aligns properly with the border offset */
}

/* Incomplete dot indicator */
.tree__incomplete-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-incomplete);
  flex-shrink: 0;
}

/* Node name */
.tree__node-name {
  flex: 0 0 auto;
  min-width: 60px;
  max-width: 160px;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: var(--font-size-base);
  border-radius: var(--radius-sm);
  padding: 1px 3px;
}

.tree__node-name:hover {
  text-decoration: underline;
  text-decoration-style: dotted;
}

/* Inline edit input */
.tree__inline-edit {
  flex: 0 0 auto;
  width: 160px;
  font-family: inherit;
  font-size: var(--font-size-base);
  border: 1px solid var(--color-btn-primary);
  border-radius: var(--radius-sm);
  padding: 1px 6px;
  outline: none;
  background: var(--color-surface);
  color: var(--color-text);
}

/* Type badges */
.tree__badge {
  flex-shrink: 0;
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  padding: 1px 7px;
  border-radius: 99px;
  color: #fff;
  text-transform: uppercase;
}

.tree__badge--doel {
  background: var(--color-doel);
}

.tree__badge--subdoel {
  background: var(--color-subdoel);
}

.tree__badge--activiteit {
  background: var(--color-activiteit);
}

/* Omvang / percentage field labels */
.tree__field-label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  flex-shrink: 0;
  cursor: default;
  white-space: nowrap;
}

/* Small number inputs */
.tree__number-input {
  width: 60px;
  font-family: inherit;
  font-size: var(--font-size-sm);
  text-align: right;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 2px 6px;
  background: var(--color-surface);
  color: var(--color-text);
  -moz-appearance: textfield; /* Firefox: hide spinner */
}

.tree__number-input::-webkit-outer-spin-button,
.tree__number-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
}

.tree__number-input:focus {
  outline: none;
  border-color: var(--color-btn-primary);
}

/* Action button group */
.tree__actions {
  display: flex;
  gap: 2px;
  flex-shrink: 0;
}

/* ============================================================
   Settings Panel
   ============================================================ */

.settings-panel {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.settings-panel__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.settings-panel__row--stacked {
  align-items: stretch;
  flex-direction: column;
  gap: 6px;
}

.settings-panel__label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  cursor: pointer;
  white-space: nowrap;
}

.settings-panel__checkbox {
  width: 14px;
  height: 14px;
  cursor: pointer;
  flex-shrink: 0;
}

.settings-panel__select {
  font-family: inherit;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 3px 6px;
  cursor: pointer;
}

.settings-panel__select:focus {
  outline: none;
  border-color: var(--color-btn-primary);
}

.settings-panel__custom-color {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  width: 100%;
}

.settings-panel__color-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.settings-panel__color-picker {
  position: relative;
  display: flex;
  align-items: center;
  gap: 6px;
  min-height: 28px;
  padding: 3px 8px 3px 4px;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.settings-panel__color-picker:hover {
  background: var(--color-btn-bg);
  border-color: #94a3b8;
}

.settings-panel__color-picker:focus-within {
  outline: 2px solid var(--color-btn-primary);
  outline-offset: 1px;
}

.settings-panel__color-input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  padding: 0;
  opacity: 0;
  border: 0;
  cursor: pointer;
}

.settings-panel__color-picker-swatch {
  width: 18px;
  height: 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  pointer-events: none;
}

.settings-panel__color-picker-text {
  line-height: 1;
  white-space: nowrap;
  pointer-events: none;
}

.settings-panel__palette-preview {
  display: flex;
  align-items: center;
  gap: 3px;
}

.settings-panel__palette-swatch {
  width: 16px;
  height: 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.settings-panel__indicator-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 100%;
}

.settings-panel__indicator-row {
  display: grid;
  grid-template-columns: 72px minmax(96px, 1fr) 28px;
  gap: 6px;
  align-items: end;
  width: 100%;
}

.settings-panel__field {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.settings-panel__field-label {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.settings-panel__input {
  width: 100%;
  min-width: 0;
  font-family: inherit;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 3px 6px;
}

.settings-panel__input:focus {
  outline: none;
  border-color: var(--color-btn-primary);
}

.settings-panel__remove-button {
  width: 28px;
  height: 28px;
  padding: 0;
}

.settings-panel__add-button {
  align-self: flex-start;
  padding: 5px 8px;
  font-size: var(--font-size-sm);
}

.settings-drawer-toggle {
  width: 30px;
  height: 30px;
  padding: 0;
  color: var(--color-text-muted);
}

.settings-drawer__close {
  width: 30px;
  height: 30px;
  padding: 0;
  color: var(--color-text-muted);
}

.settings-drawer-toggle svg,
.settings-drawer__close svg {
  display: block;
  width: 16px;
  height: 16px;
}

.settings-drawer-toggle:hover:not(:disabled),
.settings-drawer-toggle--active {
  color: var(--color-text);
  border-color: var(--color-border);
  background: var(--color-btn-hover);
}

.settings-drawer {
  display: flex;
  flex: 0 0 320px;
  width: 320px;
  min-height: 0;
  flex-direction: column;
  overflow: hidden;
  background: var(--color-surface);
  border-left: 1px solid var(--color-border);
  box-shadow: -6px 0 18px rgb(15 23 42 / 0.08);
}

.settings-drawer[hidden] {
  display: none;
}

.settings-drawer__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 8px 8px 16px;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.settings-drawer__title {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  font-weight: 600;
  line-height: 1.2;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.settings-drawer__body {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 12px;
}

/* ============================================================
   Chart Panel
   ============================================================ */

#chart-panel .panel__body {
  flex: 1;
  min-width: 0;
  padding: 0;
}

#chart-svg-container {
  width: 100%;
}

.chart-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 60px 20px;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  text-align: center;
}

#chart-svg-container svg {
  display: block;
  max-width: 100%;
}

.chart-loading {
  padding: 60px 20px;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  text-align: center;
}

@media (max-width: 700px) {
  .settings-drawer {
    position: absolute;
    inset: auto 0 0 0;
    z-index: 5;
    width: auto;
    max-height: min(78%, 420px);
    flex: none;
    border-top: 1px solid var(--color-border);
    border-left: none;
    box-shadow: 0 -10px 24px rgb(15 23 42 / 0.14);
  }
}