:root {
  --settings-w: min(23rem, 92vw);
  --settings-radius: 1.1rem;
  --settings-ease: cubic-bezier(0.22, 0.84, 0.22, 1);
}

/* ---------- Gear toggle ---------- */

.settings-toggle {
  position: fixed;
  top: clamp(1rem, 2vw, 1.6rem);
  right: clamp(1rem, 2vw, 1.6rem);
  z-index: 40;
  inline-size: 2.5rem;
  block-size: 2.5rem;
  display: grid;
  place-items: center;
  border-radius: 999px;
  border: 1px solid oklch(0.63 0.03 75 / 0.16);
  background: linear-gradient(180deg, oklch(0.24 0.018 calc(56 + var(--bg-hue-shift)) / 0.85), oklch(0.14 0.016 calc(50 + var(--bg-hue-shift)) / 0.9));
  color: var(--accent-dim);
  cursor: pointer;
  box-shadow: 0 10px 24px oklch(0.05 0.01 50 / 0.35), inset 0 1px 0 oklch(0.78 0.04 80 / 0.06);
  transition: opacity 420ms var(--settings-ease), transform 200ms var(--settings-ease), color 200ms ease, border-color 200ms ease;
}

.settings-toggle:hover,
.settings-toggle:focus-visible {
  color: var(--accent);
  border-color: oklch(0.63 0.03 75 / 0.32);
  transform: translateY(-1px);
}

.settings-toggle:active {
  transform: translateY(0);
}

body.is-idle:not(.settings-panel-open) .settings-toggle {
  opacity: 0;
  pointer-events: none;
}

/* ---------- Overlay + panel shell ---------- */

.settings-overlay {
  position: fixed;
  inset: 0;
  z-index: 45;
  background: oklch(0.08 0.01 50 / 0.55);
  backdrop-filter: blur(2px);
  opacity: 0;
  transition: opacity 280ms var(--settings-ease);
}

.settings-overlay.is-open {
  opacity: 1;
}

.settings-panel {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: 50;
  inline-size: var(--settings-w);
  display: flex;
  flex-direction: column;
  background:
    linear-gradient(180deg, oklch(0.8 0.04 80 / 0.03), transparent 12%),
    linear-gradient(145deg, oklch(0.24 0.018 calc(56 + var(--bg-hue-shift)) / 0.98), oklch(0.13 0.016 calc(50 + var(--bg-hue-shift)) / 0.99));
  border-left: 1px solid oklch(0.45 0.04 68 / 0.22);
  box-shadow: -30px 0 70px oklch(0.05 0.01 50 / 0.5);
  transform: translateX(100%);
  transition: transform 340ms var(--settings-ease);
  color: var(--text);
}

.settings-panel.is-open {
  transform: translateX(0);
}

/* ---------- Header ---------- */

.settings-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.3rem 1.4rem 1rem;
  border-bottom: 1px solid var(--line-soft);
}

.settings-heading {
  flex: 1;
  min-width: 0;
}

.settings-eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 0.68rem;
  color: var(--text-mute);
}

.settings-header h2 {
  margin: 0.2rem 0 0;
  font-family: var(--font-ui);
  font-size: 1.15rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.plan-badge {
  flex-shrink: 0;
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  font-family: var(--font-ui);
  font-size: 0.66rem;
  font-weight: 650;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-mute);
  border: 1px solid oklch(0.63 0.03 75 / 0.2);
  background: oklch(0.18 0.014 52 / 0.6);
}

.plan-badge.is-pro {
  color: oklch(0.16 0.02 60);
  border-color: transparent;
  background: linear-gradient(135deg, var(--accent), var(--accent-dim));
}

.settings-close {
  flex-shrink: 0;
  inline-size: 1.9rem;
  block-size: 1.9rem;
  display: grid;
  place-items: center;
  border-radius: 999px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-soft);
  cursor: pointer;
  transition: color 160ms ease, background 160ms ease;
}

.settings-close:hover,
.settings-close:focus-visible {
  color: var(--text);
  background: oklch(0.3 0.02 55 / 0.6);
}

/* ---------- Body & sections ---------- */

.settings-body {
  flex: 1;
  overflow-y: auto;
  padding: 1.1rem 1.4rem 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.settings-body::-webkit-scrollbar {
  inline-size: 6px;
}

.settings-body::-webkit-scrollbar-thumb {
  background: oklch(0.4 0.03 65 / 0.4);
  border-radius: 999px;
}

.settings-section {
  position: relative;
}

.settings-section-title {
  margin: 0 0 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.72rem;
  color: var(--text-mute);
}

.pro-tag {
  padding: 0.12rem 0.45rem;
  border-radius: 0.3rem;
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  border: 1px solid oklch(0.64 0.09 77 / 0.4);
  background: oklch(0.74 0.15 80 / 0.1);
}

.settings-section-inner {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  transition: filter 220ms ease, opacity 220ms ease;
}

#sectionPersonalization.is-locked .settings-section-inner {
  filter: blur(3px);
  opacity: 0.45;
  pointer-events: none;
  user-select: none;
}

/* ---------- Fields ---------- */

.field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.field-row {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.field-label {
  font-size: 0.82rem;
  color: var(--text-soft);
}

.field-input {
  width: 100%;
  padding: 0.55rem 0.7rem;
  border-radius: 0.6rem;
  border: 1px solid oklch(0.63 0.03 75 / 0.18);
  background: oklch(0.15 0.014 50 / 0.7);
  color: var(--text);
  font-family: var(--font-copy);
  font-size: 0.88rem;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.field-input:focus-visible {
  outline: none;
  border-color: oklch(0.64 0.09 77 / 0.6);
  box-shadow: 0 0 0 3px oklch(0.74 0.15 80 / 0.14);
}

.field-select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--text-mute) 50%), linear-gradient(135deg, var(--text-mute) 50%, transparent 50%);
  background-position: calc(100% - 1.1rem) center, calc(100% - 0.75rem) center;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-inline-end: 2rem;
}

.field-range {
  width: 100%;
  accent-color: var(--accent);
  height: 1.2rem;
}

/* ---------- Switch ---------- */

.switch {
  flex-shrink: 0;
  inline-size: 2.6rem;
  block-size: 1.5rem;
  border-radius: 999px;
  border: 1px solid oklch(0.63 0.03 75 / 0.2);
  background: oklch(0.16 0.014 50 / 0.9);
  position: relative;
  cursor: pointer;
  padding: 0;
  transition: background 200ms ease, border-color 200ms ease;
}

.switch-knob {
  position: absolute;
  top: 50%;
  left: 0.2rem;
  inline-size: 1.05rem;
  block-size: 1.05rem;
  border-radius: 50%;
  background: var(--text-mute);
  transform: translateY(-50%);
  transition: transform 220ms var(--settings-ease), background 200ms ease;
}

.switch[aria-checked="true"] {
  background: linear-gradient(135deg, var(--accent-dim), var(--accent));
  border-color: transparent;
}

.switch[aria-checked="true"] .switch-knob {
  background: oklch(0.14 0.014 50);
  transform: translateY(-50%) translateX(1.1rem);
}

.switch:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

/* ---------- Theme swatches ---------- */

.theme-swatches {
  display: flex;
  gap: 0.65rem;
  margin-top: 0.2rem;
}

.theme-swatch {
  position: relative;
  inline-size: 2rem;
  block-size: 2rem;
  border-radius: 50%;
  border: 2px solid transparent;
  background: var(--sw, var(--accent));
  cursor: pointer;
  display: grid;
  place-items: center;
  box-shadow: inset 0 0 0 1px oklch(0.08 0.01 50 / 0.35);
  transition: transform 160ms ease, border-color 160ms ease;
}

.theme-swatch:hover {
  transform: translateY(-1px);
}

.theme-swatch.is-active {
  border-color: var(--text);
}

.theme-swatch svg {
  color: oklch(0.16 0.02 60);
}

/* ---------- Pro lock card ---------- */

.pro-lock {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 0.55rem;
  text-align: center;
  padding: 1.1rem 1rem;
  margin-top: -0.4rem;
  border-radius: 0.9rem;
  border: 1px dashed oklch(0.64 0.09 77 / 0.35);
  background: oklch(0.2 0.02 55 / 0.55);
  color: var(--accent-dim);
}

#sectionPersonalization.is-locked .pro-lock {
  display: flex;
}

.pro-lock p {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-soft);
  max-inline-size: 22ch;
}

/* ---------- Buttons ---------- */

.btn-unlock,
.btn-primary {
  font-family: var(--font-ui);
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.76rem;
  padding: 0.6rem 1.2rem;
  border-radius: 0.6rem;
  border: none;
  cursor: pointer;
  color: oklch(0.16 0.02 60);
  background: linear-gradient(135deg, var(--accent), var(--accent-dim));
  box-shadow: 0 8px 20px oklch(0.74 0.15 80 / 0.2);
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.btn-unlock:hover,
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 24px oklch(0.74 0.15 80 / 0.28);
}

.btn-primary {
  inline-size: 100%;
  margin-top: 0.85rem;
}

.license-status {
  min-height: 1.1rem;
  margin: 0.6rem 0 0;
  font-size: 0.78rem;
  color: var(--text-mute);
}

.license-status.is-ok {
  color: oklch(0.72 0.13 150);
}

.license-status.is-error {
  color: var(--danger);
}

/* ---------- Footer ---------- */

.settings-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.4rem;
  border-top: 1px solid var(--line-soft);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-mute);
}

.footer-action {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.6rem;
  margin: -0.35rem -0.6rem;
  border-radius: 0.5rem;
  border: none;
  background: transparent;
  color: var(--text-mute);
  font: inherit;
  letter-spacing: inherit;
  text-transform: inherit;
  cursor: pointer;
  transition: color 160ms ease, background 160ms ease;
}

.footer-action:hover,
.footer-action:focus-visible {
  color: var(--accent);
  background: oklch(0.3 0.02 55 / 0.5);
}

@media (max-width: 620px) {
  .settings-panel {
    inline-size: 100vw;
  }
}

@media (prefers-reduced-motion: reduce) {
  .settings-panel,
  .settings-overlay,
  .settings-toggle,
  .switch-knob,
  .settings-section-inner {
    transition: none;
  }
}