:root {
  --bg: #f4f5f7;
  --panel: #ffffff;
  --panel-subtle: #fafbfc;
  --border: #e2e5e9;
  --border-strong: #d4d9e0;
  --text: #17191c;
  --muted: #626b76;
  --accent: #111827;
  --danger: #b42318;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  padding: 24px 16px 40px;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 "Avenir Next", "SF Pro Text", "Segoe UI", sans-serif;
}

.page-shell {
  width: min(880px, 100%);
  margin: 0 auto;
}

.page-header {
  margin-bottom: 10px;
}

.title-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.title-block {
  max-width: 560px;
}

h1,
h3,
h4 {
  margin: 0;
  font-family: "Avenir Next", "SF Pro Display", "Segoe UI", sans-serif;
  font-weight: 600;
  letter-spacing: -0.01em;
}

h1 {
  font-size: 28px;
  line-height: 1.1;
}

h3 {
  font-size: 16px;
  line-height: 1.25;
}

h4 {
  font-size: 15px;
  line-height: 1.3;
}

.page-subtitle,
.section-intro {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.version {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 9px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel);
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}

.settings-stack {
  display: grid;
  gap: 10px;
}

.settings-card {
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel);
}

.section-heading {
  margin-bottom: 10px;
}

.defaults-divider {
  height: 1px;
  background: var(--border);
  margin: 14px 0 10px;
}

.defaults-sub-heading {
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 8px;
}

p {
  margin: 0.75em 0;
}

a,
a:visited {
  color: var(--text);
  text-decoration-color: #c6ccd5;
  text-underline-offset: 0.14em;
}

a:hover,
a:focus {
  color: #000;
}

code {
  padding: 0.08em 0.38em;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel-subtle);
  font-family: "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 0.92em;
}

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

button {
  appearance: none;
  min-height: 36px;
  padding: 0 14px;
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  background: var(--panel);
  color: var(--text);
  font-weight: 500;
  cursor: pointer;
  transition: background-color 120ms ease, border-color 120ms ease;
}

button:hover {
  background: #f8f9fb;
  border-color: #c5ccd5;
}

button:active {
  background: #f1f3f5;
}

button:focus-visible,
input[type="text"]:focus,
select:focus,
textarea:focus {
  outline: 2px solid rgba(17, 24, 39, 0.14);
  outline-offset: 2px;
}

#save {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

#save:hover {
  background: #1f2937;
  border-color: #1f2937;
}

input[type="text"],
select,
textarea {
  width: 100%;
  min-height: 36px;
  padding: 8px 10px;
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  background: var(--panel);
  color: var(--text);
}

input[type="text"]:focus,
select:focus,
textarea:focus {
  border-color: #9ca3af;
}

input[type="checkbox"] {
  width: 16px;
  height: 16px;
  margin: 2px 0 0;
  accent-color: var(--accent);
}

label {
  display: block;
}

label em {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-style: normal;
}

.shortcuts-grid {
  display: flex;
  flex-direction: column;
}

.shortcut-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 120px 120px;
  gap: 12px;
  align-items: center;
  padding: 10px 0;
  border-top: 1px solid var(--border);
}

.shortcuts-grid .shortcut-row:first-child {
  padding-top: 0;
  border-top: 0;
}

.shortcut-row.customs {
  grid-template-columns: minmax(0, 1fr) 120px 120px 38px;
}

.shortcut-label {
  color: var(--text);
  font-weight: 500;
}

.customKey,
.customValue {
  text-align: center;
}

#addShortcutSelector {
  width: min(220px, 100%);
  margin-top: 12px;
}

.removeParent,
.toggle-site-rule {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  min-width: 36px;
  height: 36px;
  padding: 0;
  font-size: 18px;
  line-height: 1;
}

.removeParent {
  color: var(--danger);
  font-weight: 500;
}

.toggle-site-rule {
  font-weight: 400;
}

.row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 160px;
  gap: 16px;
  align-items: start;
  padding: 10px 0;
  border-top: 1px solid var(--border);
}

.settings-card .row:first-of-type {
  padding-top: 0;
  border-top: 0;
}

.row.row-controller-margin {
  grid-template-columns: minmax(0, 1fr) minmax(0, 260px);
}

.controller-margin-inputs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  width: 100%;
}

.margin-pad-cell {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.margin-pad-mini {
  font-size: 10px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.controller-margin-inputs input[type="text"] {
  width: 100%;
  min-width: 0;
  box-sizing: border-box;
}

.site-rule-option.site-rule-margin-option {
  grid-template-columns: minmax(0, 1fr) minmax(0, 220px);
}

.site-rule-override-section {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.site-rule-content > .site-rule-override-section:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.site-override-lead {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-weight: 600;
  margin-bottom: 8px;
  cursor: pointer;
  width: auto;
}

.site-override-lead input {
  margin-top: 3px;
}

.site-rule-override-section .site-override-fields,
.site-rule-override-section .site-placement-container,
.site-rule-override-section .site-visibility-container,
.site-rule-override-section .site-autohide-container,
.site-rule-override-section .site-playback-container,
.site-rule-override-section .site-opacity-container,
.site-rule-override-section .site-subtitleNudge-container {
  padding-left: 4px;
}

.cb-editor {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.cb-editor-disabled {
  opacity: 0.4;
  pointer-events: none;
  user-select: none;
}

.cb-zone-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.cb-dropzone {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  min-height: 52px;
  padding: 10px;
  border: 2px dashed var(--border);
  border-radius: 10px;
  background: var(--panel-subtle);
  transition: border-color 150ms ease, background 150ms ease;
}

.cb-dropzone.cb-over {
  border-color: var(--accent);
  background: rgba(17, 24, 39, 0.03);
}

.cb-active-zone:empty::after {
  content: "Drag buttons here";
  display: flex;
  align-items: center;
  width: 100%;
  justify-content: center;
  color: var(--muted);
  font-size: 13px;
  font-style: italic;
}

.cb-available-zone:empty::after {
  content: "All buttons active";
  display: flex;
  align-items: center;
  width: 100%;
  justify-content: center;
  color: var(--muted);
  font-size: 13px;
  font-style: italic;
}

.cb-block {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px 7px 8px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: var(--panel);
  cursor: grab;
  user-select: none;
  transition: box-shadow 150ms ease, opacity 150ms ease;
}

.cb-block:hover {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.cb-block:active {
  cursor: grabbing;
}

.cb-block.cb-dragging {
  opacity: 0.35;
}

.cb-grip {
  width: 6px;
  min-width: 6px;
  height: 14px;
  background-image: radial-gradient(circle, currentColor 1px, transparent 1px);
  background-size: 3px 3px;
  opacity: 0.35;
}

.cb-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 4px;
  background: var(--panel-subtle);
  border: 1px solid var(--border);
  font-size: 12px;
  line-height: 1;
}

.cb-label {
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
}

#siteRulesContainer {
  display: grid;
  gap: 12px;
  margin-bottom: 12px;
}

.site-rule {
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel-subtle);
}

.site-rule-header {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
}

.site-pattern {
  min-width: 0;
  font-family: "SFMono-Regular", Menlo, Consolas, monospace;
}

.site-rule-body {
  margin-top: 12px;
}

.site-rule-content.disabled-rule {
  opacity: 0.55;
  pointer-events: none;
}

.site-rule-option {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 150px;
  gap: 16px;
  align-items: start;
  padding: 8px 0;
  border-top: 1px solid var(--border);
}

.site-rule-body > .site-rule-option:first-child,
.site-rule-content > .site-rule-option:first-child {
  padding-top: 0;
  border-top: 0;
}

.site-rule-option label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  width: auto;
}

.site-rule-controlbar,
.site-rule-shortcuts {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.site-rule-controlbar > label,
.site-rule-shortcuts > label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  width: auto;
  margin: 0;
}

.site-controlbar-container,
.site-popup-controlbar-container {
  margin-top: 12px;
}

.site-shortcuts-container {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 12px;
}

.site-shortcuts-container .shortcut-row {
  grid-template-columns: minmax(0, 1fr) 110px 110px minmax(0, 1fr);
  padding: 8px 0;
  border-top: 1px solid var(--border);
}

.site-shortcuts-container .shortcut-row:first-child {
  padding-top: 0;
  border-top: 0;
}

.force-label {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  width: auto;
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.force-label input {
  margin-top: 2px;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

#status {
  min-height: 1.3em;
  margin-top: 10px;
  color: var(--muted);
  font-weight: 500;
}

#status:empty {
  display: none;
}

#faq hr {
  height: 1px;
  margin: 0 0 14px;
  border: 0;
  background: var(--border);
}

.support-footer {
  padding: 16px 20px;
  color: var(--muted);
}

.support-footer p {
  margin: 0;
}

.support-footer a {
  font-weight: 600;
}

@media (max-width: 720px) {
  .shortcut-row,
  .shortcut-row.customs,
  .row,
  .site-rule-option,
  .site-shortcuts-container .shortcut-row {
    grid-template-columns: 1fr;
  }

  .action-row button,
  #addShortcutSelector {
    width: 100%;
  }

  .site-rule-header {
    grid-template-columns: 36px minmax(0, 1fr);
  }

  .remove-site-rule {
    grid-column: 1 / -1;
  }
}

@media (max-width: 520px) {
  body {
    padding: 16px 12px 28px;
  }

  h1 {
    font-size: 24px;
  }

  .settings-card {
    padding: 16px;
  }

  .site-rule-header {
    grid-template-columns: 1fr;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111315;
    --panel: #171a1d;
    --panel-subtle: #1b1f23;
    --border: #2b3138;
    --border-strong: #3a414a;
    --text: #f2f4f6;
    --muted: #a0a8b2;
    --accent: #f2f4f6;
    --danger: #ff8a80;
  }

  body {
    color-scheme: dark;
  }

  a,
  a:visited {
    color: #f2f4f6;
    text-decoration-color: #4b5563;
  }

  #save {
    background: #f2f4f6;
    border-color: #f2f4f6;
    color: #111315;
  }

  #save:hover {
    background: #dfe3e8;
    border-color: #dfe3e8;
  }

  .cb-dropzone.cb-over {
    background: rgba(255, 255, 255, 0.04);
  }

  input[type="text"]:focus,
  select:focus,
  textarea:focus {
    border-color: #6b7280;
  }
}