:root,
:root[data-theme="dark"] {
  --bg: #0d0d0f;
  --bg-top: #111114;
  --surface: #17171b;
  --surface-soft: #1d1d22;
  --surface-strong: #25252b;
  --ink: #f3f0ea;
  --muted: rgba(243, 240, 234, 0.6);
  --line: rgba(243, 240, 234, 0.09);
  --line-strong: rgba(243, 240, 234, 0.14);
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.42);
  --button-ghost: rgba(255, 255, 255, 0.05);
  --button-ghost-hover: rgba(255, 255, 255, 0.08);
  --button-solid-bg: #f3f0ea;
  --button-solid-ink: #101114;
  --field-bg: rgba(255, 255, 255, 0.05);
  --field-bg-strong: rgba(255, 255, 255, 0.075);
  --accent: #7fcf98;
  --accent-soft: rgba(127, 207, 152, 0.14);
  --sans: "Avenir Next", "Helvetica Neue", Arial, sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;
}

:root[data-theme="light"] {
  --bg: #efebe4;
  --bg-top: #f7f2ea;
  --surface: #fbf8f2;
  --surface-soft: #f1ece4;
  --surface-strong: #e7dfd2;
  --ink: #181614;
  --muted: rgba(24, 22, 20, 0.62);
  --line: rgba(24, 22, 20, 0.09);
  --line-strong: rgba(24, 22, 20, 0.16);
  --shadow: 0 24px 60px rgba(52, 39, 24, 0.12);
  --button-ghost: rgba(24, 22, 20, 0.05);
  --button-ghost-hover: rgba(24, 22, 20, 0.08);
  --button-solid-bg: #181614;
  --button-solid-ink: #f7f2ea;
  --field-bg: rgba(24, 22, 20, 0.05);
  --field-bg-strong: rgba(24, 22, 20, 0.09);
  --accent: #4f9a69;
  --accent-soft: rgba(79, 154, 105, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background-color: var(--bg);
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.05), transparent 28rem),
    linear-gradient(180deg, var(--bg-top) 0%, var(--bg) 100%);
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--bg);
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.05), transparent 28rem),
    linear-gradient(180deg, var(--bg-top) 0%, var(--bg) 100%);
  color: var(--ink);
  font-family: var(--sans);
}

button,
select,
input {
  font: inherit;
}

button {
  border: 0;
  background: none;
  color: inherit;
  cursor: pointer;
}

.app-shell {
  min-height: 100vh;
  padding: 0;
}

.ambient-panel {
  position: relative;
  display: grid;
  min-height: 100vh;
  padding: 18px 18px 28px;
}

.icon-button {
  position: absolute;
  top: 18px;
  right: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  flex-direction: column;
  padding: 0;
  background: transparent;
  color: var(--muted);
  opacity: 0.85;
}

.icon-button span {
  width: 20px;
  height: 1.5px;
  border-radius: 999px;
  background: currentColor;
}

.question-stage {
  display: grid;
  align-self: center;
  width: min(980px, 100%);
  margin: 0 auto;
}

.question-card {
  display: grid;
  min-height: min(68svh, 680px);
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.04), transparent 32rem),
    var(--surface);
  border-radius: 36px;
  box-shadow: var(--shadow);
  transform-origin: 50% 50%;
  will-change: transform, opacity, box-shadow;
  touch-action: pan-y;
}

.question-card-inner {
  display: grid;
  align-content: center;
  justify-items: center;
  padding: clamp(24px, 4.2vw, 64px);
  text-align: center;
  will-change: transform, opacity;
}

.question-category {
  display: none;
}

.question-card h1 {
  margin: 0;
  max-width: 16ch;
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(2rem, 5.3vw, 4.45rem);
  line-height: 1.02;
  font-weight: 500;
  letter-spacing: -0.05em;
  text-wrap: balance;
}

.control-row,
.settings-head,
.setting-row {
  display: flex;
  align-items: center;
}

.settings-head,
.setting-row {
  justify-content: space-between;
}

.control-row {
  justify-content: center;
  gap: 12px;
  margin-top: 18px;
}

.primary-button,
.secondary-button {
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  transition: background 160ms ease, color 160ms ease, transform 160ms ease;
}

.primary-button {
  background: var(--button-solid-bg);
  color: var(--button-solid-ink);
  font-weight: 700;
}

.secondary-button {
  background: var(--button-ghost);
  color: var(--ink);
}

.arrow-button {
  min-width: 160px;
  padding: 0 24px;
  font-size: 2rem;
  line-height: 1;
}

.arrow-button span {
  display: inline-block;
  transform: translateY(-1px);
}

.arrow-button-subtle {
  color: var(--muted);
}

.secondary-button:disabled {
  opacity: 0.28;
  cursor: default;
}

.primary-button:hover,
.secondary-button:hover,
.icon-button:hover,
.icon-close:hover,
.category-option:hover,
.primary-button:focus-visible,
.secondary-button:focus-visible,
.icon-button:focus-visible,
.icon-close:focus-visible,
.category-option:focus-within {
  transform: translateY(-1px);
}

.secondary-button:hover,
.icon-close:hover,
.category-option:hover {
  background: var(--button-ghost-hover);
}

.icon-button:hover {
  background: transparent;
  color: var(--ink);
  opacity: 1;
}

.settings-dialog {
  width: min(520px, calc(100vw - 24px));
  border: 0;
  padding: 0;
  background: transparent;
}

.settings-dialog::backdrop {
  background: rgba(3, 3, 5, 0.7);
  backdrop-filter: blur(16px);
}

.settings-panel {
  padding: 20px;
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  box-shadow: none;
}

.settings-head h2 {
  margin: 0;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.55rem;
  font-weight: 500;
  letter-spacing: -0.04em;
}

.icon-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  padding: 0;
  background: transparent;
  color: var(--ink);
  font-size: 2rem;
}

.settings-group {
  margin-top: 18px;
  padding: 0;
  border-radius: 0;
  background: transparent;
}

.settings-group + .settings-group {
  margin-top: 14px;
}

.settings-section {
  margin-top: 0;
}

.settings-label {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.category-strip {
  display: grid;
  gap: 8px;
}

.category-option {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 52px;
  padding: 0 14px;
  border-radius: 16px;
  background: var(--field-bg-strong);
  color: var(--ink);
  transition: background 160ms ease, border-color 160ms ease;
}

.category-option input[type="checkbox"] {
  width: 20px;
  height: 20px;
  margin: 0;
  accent-color: var(--accent);
}

.category-option span {
  font-size: 1rem;
  font-weight: 450;
}

.category-option:has(input:checked) {
  background: color-mix(in srgb, var(--field-bg-strong) 78%, var(--accent-soft));
}

.setting-row {
  gap: 16px;
  min-height: 56px;
  margin-top: 10px;
  padding: 0 14px;
  border-radius: 16px;
  background: var(--field-bg-strong);
  color: var(--ink);
}

.setting-row span {
  color: var(--ink);
  font-size: 1rem;
  font-weight: 450;
}

.setting-row select {
  accent-color: var(--button-solid-bg);
}

.setting-row select {
  min-width: 148px;
  padding: 9px 36px 9px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-strong);
  color: var(--ink);
  appearance: none;
  -webkit-appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--muted) 50%),
    linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position:
    calc(100% - 18px) calc(50% - 1px),
    calc(100% - 12px) calc(50% - 1px);
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
}

.switch {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.switch input {
  position: absolute;
  inset: 0;
  opacity: 0;
  margin: 0;
}

.switch-ui {
  position: relative;
  display: inline-block;
  width: 46px;
  height: 28px;
  border-radius: 999px;
  background: var(--surface-strong);
  transition: background 160ms ease;
}

.switch-ui::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 22px;
  height: 22px;
  border-radius: 999px;
  background: var(--muted);
  transition: transform 160ms ease, background 160ms ease;
}

.switch input:checked + .switch-ui {
  background: var(--accent);
}

.switch input:checked + .switch-ui::after {
  transform: translateX(18px);
  background: #f4f7f3;
}

.switch input:focus-visible + .switch-ui {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

.app-shell[data-font-scale="xxsmall"] .question-card h1 {
  font-size: clamp(1.85rem, 4.9vw, 4.15rem);
  max-width: 24ch;
}

.app-shell[data-font-scale="xxsmall"] .question-card-inner {
  padding: clamp(18px, 2.6vw, 30px);
}

.app-shell[data-font-scale="xsmall"] .question-card h1 {
  font-size: clamp(2.05rem, 5.4vw, 4.55rem);
  max-width: 21ch;
}

.app-shell[data-font-scale="xsmall"] .question-card-inner {
  padding: clamp(20px, 3vw, 36px);
}

.app-shell[data-font-scale="large"] .question-card h1 {
  font-size: clamp(2.7rem, 6.9vw, 5.9rem);
}

.app-shell[data-font-scale="xlarge"] .question-card h1 {
  font-size: clamp(3rem, 7.5vw, 6.4rem);
}

.legal-page {
  min-height: 100vh;
  padding: 20px 16px 40px;
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.05), transparent 28rem),
    linear-gradient(180deg, var(--bg-top) 0%, var(--bg) 100%);
  color: var(--ink);
}

.legal-back {
  display: inline-flex;
  margin: 0 auto 18px;
  color: var(--muted);
  text-decoration: none;
}

.legal-card {
  width: min(760px, 100%);
  margin: 0 auto;
  padding: 26px;
  border-radius: 28px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.legal-card h1 {
  margin: 8px 0 0;
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 500;
  letter-spacing: -0.04em;
}

.legal-copy {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.legal-copy p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

@media (max-width: 720px) {
  .question-card {
    min-height: min(62svh, 560px);
    border-radius: 28px;
  }

  .question-card h1 {
    max-width: 13ch;
  }
}

@media (max-width: 520px) {
  .ambient-panel {
    padding: 12px 12px 22px;
  }

  .icon-button {
    top: 12px;
    right: 12px;
  }

  .question-card {
    min-height: min(58svh, 500px);
    border-radius: 24px;
  }

  .control-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .primary-button,
  .secondary-button {
    width: 100%;
  }

  .arrow-button {
    min-width: 0;
  }

  .setting-row {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding: 14px 16px;
  }

  .setting-row select {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0ms !important;
    animation-duration: 0ms !important;
    scroll-behavior: auto !important;
  }
}