:root {
  --ink: #12201c;
  --ink-soft: #4a5f58;
  --paper: #e7efe9;
  --panel: #f7fbf8;
  --panel-strong: #ffffff;
  --line: #c9dbd2;
  --line-strong: #a9c4b7;
  --accent: #0c7a5c;
  --accent-deep: #06553f;
  --accent-soft: rgba(12, 122, 92, 0.1);
  --good: #178a55;
  --good-bg: #daf3e6;
  --bad: #c13b2d;
  --bad-bg: #f8e0db;
  --warn: #b56a00;
  --code-bg: #101c19;
  --code-fg: #d7ebe2;
  --shadow: 0 14px 34px rgba(16, 32, 28, 0.07);
  --radius: 14px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font: "Outfit", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

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

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
}

.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 70% 45% at 8% -8%, #bfe3d4 0%, transparent 55%),
    radial-gradient(ellipse 55% 40% at 100% 0%, #d5e6c9 0%, transparent 50%),
    linear-gradient(165deg, #eef5f0 0%, #e0ebe4 48%, #d5e4dc 100%);
}

.screen {
  display: none;
  max-width: 640px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
  min-height: 100dvh;
}

#screen-menu {
  max-width: 720px;
}

.screen.active {
  display: flex;
  flex-direction: column;
}

.brand {
  margin: 1.75rem 0 1.75rem;
}

.brand-mark {
  margin: 0 0 0.65rem;
  font-size: clamp(2.35rem, 8vw, 3.25rem);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 0.95;
  color: var(--accent-deep);
}

.brand h1 {
  margin: 0 0 0.5rem;
  font-size: 1.08rem;
  font-weight: 500;
  color: var(--ink-soft);
}

.lede {
  margin: 0;
  max-width: 38ch;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

/* Settings */
.settings-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem 1.5rem;
  margin-bottom: 1.15rem;
  padding: 0.8rem 1rem;
  background: color-mix(in srgb, var(--panel-strong) 78%, transparent);
  border: 1px solid var(--line);
  border-radius: 12px;
  backdrop-filter: blur(8px);
}

.setting {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

.setting-label {
  font-weight: 500;
  color: var(--ink);
}

.setting select {
  font: inherit;
  font-family: var(--mono);
  font-size: 0.8rem;
  border: 1.5px solid var(--line);
  border-radius: 8px;
  padding: 0.38rem 0.55rem;
  background: var(--panel);
  color: var(--ink);
  cursor: pointer;
}

.setting select:focus {
  outline: 2px solid color-mix(in srgb, var(--accent) 35%, transparent);
  outline-offset: 1px;
  border-color: var(--accent);
}

.setting-toggle {
  cursor: pointer;
  user-select: none;
  margin-left: auto;
}

.toggle {
  position: relative;
  display: inline-flex;
  width: 42px;
  height: 26px;
}

.toggle input {
  position: absolute;
  inset: 0;
  opacity: 0;
  margin: 0;
  cursor: pointer;
  z-index: 1;
}

.toggle-track {
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: #c5d5cd;
  transition: background 0.18s var(--ease);
}

.toggle-track::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.18);
  transition: transform 0.18s var(--ease);
}

.toggle input:checked + .toggle-track {
  background: var(--accent);
}

.toggle input:checked + .toggle-track::after {
  transform: translateX(16px);
}

.toggle input:focus-visible + .toggle-track {
  outline: 2px solid color-mix(in srgb, var(--accent) 45%, transparent);
  outline-offset: 2px;
}

/* Levels — square tile grid on start screen */
.level-pick {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.level-card {
  appearance: none;
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
  min-width: 0;
  border: 1.5px solid var(--line);
  background: var(--panel);
  border-radius: calc(var(--radius) + 2px);
  padding: 0.95rem 1rem 1rem;
  text-align: left;
  cursor: pointer;
  transition:
    border-color 0.16s var(--ease),
    transform 0.16s var(--ease),
    box-shadow 0.16s var(--ease);
  box-shadow: var(--shadow);
}

.level-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 18px 40px rgba(16, 32, 28, 0.1);
}

.level-card:active {
  transform: translateY(0) scale(0.98);
}

.level-card:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--accent) 45%, transparent);
  outline-offset: 3px;
}

.level-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.45rem;
  padding: 0.22rem 0.45rem;
  border-radius: 6px;
  background: var(--accent-soft);
}

.level-title {
  display: block;
  flex: 1;
  font-size: clamp(0.92rem, 3.4vw, 1.05rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.28;
  margin: 0;
}

.level-meta {
  display: block;
  margin-top: auto;
  padding-top: 0.55rem;
  font-size: 0.72rem;
  line-height: 1.35;
  color: var(--ink-soft);
}

.level-card[data-level="junior"] {
  background: linear-gradient(155deg, #eef9f3 0%, var(--panel) 58%);
}

.level-card[data-level="middle"] {
  background: linear-gradient(155deg, #edf4fc 0%, var(--panel) 58%);
}

.level-card[data-level="middle"] .level-tag {
  color: #1a5f8a;
  background: rgba(26, 95, 138, 0.1);
}

.level-card[data-level="senior"] {
  background: linear-gradient(155deg, #f3eef9 0%, var(--panel) 58%);
}

.level-card[data-level="senior"] .level-tag {
  color: #5a3d8a;
  background: rgba(90, 61, 138, 0.1);
}

.level-card-mix {
  border-style: dashed;
  background: linear-gradient(155deg, #eef5f0 0%, color-mix(in srgb, var(--panel) 72%, #e8f3ec) 58%);
}

.level-card-mistakes {
  border-color: #dfb0a4;
  background: linear-gradient(155deg, #fdf1ee 0%, var(--panel) 58%);
}

.level-card-mistakes .level-tag {
  color: #a84a3a;
  background: rgba(168, 74, 58, 0.1);
}

.menu-stats {
  margin-top: 1.5rem;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

.menu-stats strong {
  color: var(--ink);
  font-weight: 600;
}

.linkish {
  appearance: none;
  border: none;
  background: none;
  color: var(--accent-deep);
  font: inherit;
  font-size: 0.84rem;
  text-decoration: underline;
  text-underline-offset: 0.15em;
  cursor: pointer;
  padding: 0;
  margin-top: 0.35rem;
}

/* Groups */
.groups-top {
  display: flex;
  align-items: flex-start;
  gap: 0.45rem;
  margin: 0.85rem 0 1.25rem;
}

.groups-level {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--accent);
}

.groups-heading {
  margin: 0.1rem 0 0;
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.group-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.group-card {
  appearance: none;
  border: 1.5px solid var(--line);
  background: var(--panel);
  border-radius: 12px;
  padding: 0.8rem 1rem;
  text-align: left;
  cursor: pointer;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.3rem 0.9rem;
  align-items: center;
  font: inherit;
  transition: border-color 0.15s var(--ease), transform 0.15s var(--ease);
  box-shadow: var(--shadow);
}

.group-card:hover {
  border-color: var(--accent);
  transform: translateX(2px);
}

.group-card.is-all {
  border-color: color-mix(in srgb, var(--accent) 55%, var(--line));
  background: linear-gradient(135deg, #e6f5ee, var(--panel));
}

.group-card-title {
  font-weight: 600;
  font-size: 0.98rem;
}

.group-card-count {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-soft);
  grid-row: span 2;
  text-align: right;
}

.group-card-sub {
  grid-column: 1;
  font-size: 0.8rem;
  color: var(--ink-soft);
}

.group-progress {
  margin-top: 0.3rem;
  height: 5px;
  background: rgba(15, 28, 26, 0.1);
  border-radius: 99px;
  overflow: hidden;
  grid-column: 1 / -1;
}

.group-progress > span {
  display: block;
  height: 100%;
  background: var(--accent);
  border-radius: inherit;
  width: 0%;
}

.group-card-pct {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--ink-soft);
  margin-top: 0.15rem;
}

/* Quiz chrome */
.quiz-top {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 0.4rem;
}

.top-right {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.ghost {
  appearance: none;
  border: none;
  background: transparent;
  font: inherit;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--ink-soft);
  cursor: pointer;
  padding: 0.35rem 0.55rem;
  border-radius: 8px;
  line-height: 1.2;
  white-space: nowrap;
}

.ghost:hover {
  color: var(--ink);
  background: rgba(15, 28, 26, 0.06);
}

.app-version {
  margin: 1.5rem 0 0.5rem;
  font-size: 0.75rem;
  color: var(--ink-soft);
  opacity: 0.75;
  letter-spacing: 0.02em;
}

.progress-track {
  height: 8px;
  background: rgba(15, 28, 26, 0.1);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), #2aa876);
  border-radius: inherit;
  transition: width 0.3s var(--ease);
}

.streak {
  display: flex;
  align-items: center;
  gap: 0.28rem;
  font-family: var(--mono);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--warn);
  min-width: 2.4rem;
}

.streak-flame {
  font-size: 0.65rem;
}

.timer {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--accent-deep);
  min-width: 2.5rem;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.timer.is-low {
  color: var(--bad);
}

.timer-track {
  height: 3px;
  background: rgba(15, 28, 26, 0.1);
  border-radius: 99px;
  overflow: hidden;
  margin-bottom: 0.85rem;
}

.timer-fill {
  height: 100%;
  width: 100%;
  background: var(--accent);
  transition: width 0.1s linear;
}

.timer-fill.is-low {
  background: var(--bad);
}

.quiz-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.55rem;
  align-items: center;
}

.quiz-hint {
  margin: 0 0 1rem;
  font-size: 0.82rem;
  color: var(--muted, #8b949e);
  line-height: 1.4;
}

.topic,
.level-mini,
.group-mini,
.score-mini {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 0.26rem 0.5rem;
  border-radius: 6px;
  line-height: 1.35;
  white-space: normal;
  overflow: visible;
  text-overflow: unset;
  max-width: none;
}

.topic {
  background: var(--accent-soft);
  color: var(--accent-deep);
}

.group-mini {
  background: rgba(181, 106, 0, 0.1);
  color: #8a5400;
}

.level-mini {
  background: rgba(15, 28, 26, 0.07);
  color: var(--ink-soft);
  text-transform: none;
}

.score-mini {
  margin-left: auto;
  color: var(--ink-soft);
  background: transparent;
  padding-right: 0;
  font-variant-numeric: tabular-nums;
}

.question-panel {
  margin-bottom: 1.35rem;
  animation: rise-in 0.3s var(--ease) both;
}

.question-panel h2 {
  margin: 0;
  font-size: clamp(1.18rem, 3.4vw, 1.4rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.35;
}

.code-wrap {
  margin: 0 0 0.95rem;
}

.code-block {
  margin: 0;
  padding: 0.95rem 1.05rem;
  background: var(--code-bg);
  color: var(--code-fg);
  border-radius: 12px;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.55;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
  border: 1px solid #1c302a;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.input-mode-help {
  margin: -0.35rem 0 1rem;
  padding: 0.7rem 0.9rem;
  font-size: 0.82rem;
  line-height: 1.45;
  color: var(--ink-soft);
  background: color-mix(in srgb, var(--accent-soft) 70%, transparent);
  border-radius: 10px;
  border: 1px solid color-mix(in srgb, var(--accent) 22%, var(--line));
}

.input-mode-help code,
.input-mode-help kbd {
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.08rem 0.35rem;
  border-radius: 4px;
  background: #eef5f1;
  border: 1px solid var(--line);
}

.data-error {
  margin: 0 0 1rem;
  padding: 0.85rem 1rem;
  border-radius: 12px;
  background: var(--bad-bg);
  border: 1.5px solid #e8a89f;
  color: #6b1f16;
  font-size: 0.9rem;
  line-height: 1.45;
}

.loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: grid;
  place-items: center;
  background: rgba(18, 32, 28, 0.28);
  backdrop-filter: blur(4px);
}

.loading-overlay[hidden] {
  display: none !important;
}

.loading-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 1.25rem 1.5rem;
  background: var(--panel-strong);
  border-radius: 16px;
  border: 1.5px solid var(--line);
  box-shadow: var(--shadow);
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.loading-spinner {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 3px solid var(--line);
  border-top-color: var(--accent);
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.ghost-btn {
  appearance: none;
  border: 1.5px solid var(--line);
  background: transparent;
  color: var(--ink-soft);
  font: inherit;
  font-size: 0.88rem;
  font-weight: 500;
  padding: 0.7rem 1rem;
  border-radius: 11px;
  cursor: pointer;
  width: 100%;
  transition: border-color 0.14s var(--ease), color 0.14s var(--ease);
}

.ghost-btn:hover {
  border-color: var(--bad);
  color: var(--bad);
}

.drop-early {
  margin-top: 0.85rem;
}

/* Options */
.options {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  animation: rise-in 0.34s 0.04s var(--ease) both;
}

.option {
  appearance: none;
  width: 100%;
  border: 1.5px solid var(--line);
  background: var(--panel);
  border-radius: 12px;
  padding: 0.95rem 1.05rem;
  min-height: 3.15rem;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.14s var(--ease), background 0.14s var(--ease), transform 0.12s var(--ease);
  font-family: var(--mono);
  font-size: 0.9rem;
  font-weight: 500;
  line-height: 1.4;
  color: var(--ink);
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
}

.option:hover:not(:disabled) {
  border-color: var(--accent);
  transform: translateX(2px);
}

.option:active:not(:disabled) {
  transform: scale(0.99);
}

.option:disabled {
  cursor: default;
}

.option.correct {
  border-color: var(--good);
  background: var(--good-bg);
  color: #0d4a30;
}

.option.wrong {
  border-color: var(--bad);
  background: var(--bad-bg);
  color: #6b1f16;
}

.option.dim {
  opacity: 0.42;
}

.option-key {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.45rem;
  height: 1.45rem;
  margin-top: 0.05rem;
  border-radius: 6px;
  background: rgba(15, 28, 26, 0.07);
  color: var(--ink-soft);
  font-size: 0.72rem;
  font-weight: 600;
}

.option-text {
  flex: 1;
  min-width: 0;
  word-break: break-word;
}

.options.is-input-ref .option-ref {
  opacity: 0.92;
  background: color-mix(in srgb, var(--panel) 85%, #e8f3ec);
}

.options.is-input-ref .option-ref:hover:not(:disabled) {
  opacity: 1;
}

.option-multi {
  position: relative;
}

.option-check {
  flex: 0 0 auto;
  width: 1.25rem;
  height: 1.25rem;
  margin-top: 0.12rem;
  border: 1.5px solid var(--line-strong);
  border-radius: 5px;
  background: #fff;
  position: relative;
}

.option-multi.is-selected {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent-soft) 55%, var(--panel));
}

.option-multi.is-selected .option-check {
  border-color: var(--accent);
  background: var(--accent);
}

.option-multi.is-selected .option-check::after {
  content: "";
  position: absolute;
  left: 0.32rem;
  top: 0.08rem;
  width: 0.32rem;
  height: 0.62rem;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.multi-check {
  margin-top: 0.75rem;
}

.multi-check[hidden] {
  display: none !important;
}

/* Answer input — main polish target */
.input-form {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  margin: 0 0 0.35rem;
  padding: 1rem 1.05rem 1.05rem;
  background: var(--panel-strong);
  border: 1.5px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
  animation: rise-in 0.34s 0.04s var(--ease) both;
}

.input-form[hidden],
.options[hidden],
.code-wrap[hidden],
.feedback[hidden],
.timer[hidden],
.timer-track[hidden],
#menu-stats[hidden],
.ghost-btn[hidden],
.drop-early[hidden],
#data-error[hidden],
#input-mode-help[hidden] {
  display: none !important;
}

.input-label {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.input-shell {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: stretch;
  gap: 0;
  min-height: 3.15rem;
  border: 1.5px solid var(--line-strong);
  border-radius: 12px;
  background: #f0f6f2;
  overflow: hidden;
  transition: border-color 0.15s var(--ease), box-shadow 0.15s var(--ease);
}

.input-shell:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
  background: #fff;
}

.input-shell.is-ok {
  border-color: var(--good);
  background: var(--good-bg);
  box-shadow: none;
}

.input-shell.is-fail {
  border-color: var(--bad);
  background: var(--bad-bg);
  box-shadow: none;
}

.input-shell.is-ok .input-prompt {
  color: var(--good);
}

.input-shell.is-fail .input-prompt {
  color: var(--bad);
}

.input-prompt {
  display: flex;
  align-items: center;
  padding: 0 0.15rem 0 0.9rem;
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  user-select: none;
}

.answer-input {
  width: 100%;
  min-width: 0;
  border: none;
  background: transparent;
  font-family: var(--mono);
  font-size: 1.02rem;
  font-weight: 500;
  padding: 0.85rem 0.65rem;
  color: var(--ink);
  outline: none;
}

.answer-input::placeholder {
  color: #8aa399;
  font-weight: 400;
}

.answer-input:disabled {
  opacity: 0.65;
}

.input-submit {
  appearance: none;
  border: none;
  border-left: 1.5px solid var(--line);
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0 1.15rem;
  cursor: pointer;
  transition: background 0.14s var(--ease);
  white-space: nowrap;
}

.input-submit:hover {
  background: var(--accent-deep);
}

.input-submit:active {
  transform: scale(0.98);
}

.input-submit:disabled {
  opacity: 0.55;
  cursor: default;
}

.input-hint {
  margin: 0.1rem 0 0;
  font-size: 0.78rem;
  color: var(--ink-soft);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
}

.input-hint kbd {
  display: inline-flex;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.12rem 0.4rem;
  border-radius: 5px;
  border: 1px solid var(--line);
  background: #eef5f1;
  color: var(--ink);
  box-shadow: 0 1px 0 var(--line);
}

/* Feedback */
.feedback {
  margin-top: 1.1rem;
  padding: 1rem 1.05rem 1.1rem;
  border-radius: 16px;
  animation: pop-in 0.26s var(--ease) both;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.feedback.is-good {
  background: linear-gradient(160deg, #e5f7ed 0%, var(--good-bg) 55%);
  border: 1.5px solid #8fd4b0;
}

.feedback.is-bad {
  background: linear-gradient(160deg, #fdf0ed 0%, var(--bad-bg) 55%);
  border: 1.5px solid #e8a89f;
}

.feedback-head {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.feedback-icon {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.85rem;
  height: 1.85rem;
  border-radius: 50%;
  font-size: 0.85rem;
  font-weight: 700;
  line-height: 1;
}

.feedback.is-good .feedback-icon {
  background: var(--good);
  color: #fff;
}

.feedback.is-bad .feedback-icon {
  background: var(--bad);
  color: #fff;
}

.feedback-title {
  margin: 0;
  font-weight: 700;
  font-size: 1.08rem;
  letter-spacing: -0.02em;
}

.feedback.is-good .feedback-title {
  color: #0d4a30;
}

.feedback.is-bad .feedback-title {
  color: #6b1f16;
}

.feedback-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.feedback-compare[hidden],
.feedback-body[hidden] {
  display: none !important;
}

.feedback-chip {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.65rem 0.75rem;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.72);
  border: 1.5px solid transparent;
  min-width: 0;
}

.feedback-chip.is-yours {
  border-color: color-mix(in srgb, var(--bad) 35%, var(--line));
}

.feedback-chip.is-correct {
  border-color: color-mix(in srgb, var(--good) 45%, var(--line));
}

.feedback-chip.is-empty {
  opacity: 0.72;
}

.feedback-chip-label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.feedback-chip.is-yours .feedback-chip-label {
  color: #a84a3a;
}

.feedback-chip.is-correct .feedback-chip-label {
  color: var(--good);
}

.feedback-chip-value {
  font-family: var(--mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink);
  word-break: break-word;
  line-height: 1.35;
}

.feedback-body {
  padding: 0.75rem 0.85rem;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid rgba(15, 28, 26, 0.06);
}

.feedback-body-label {
  margin: 0 0 0.35rem;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.feedback-explain {
  margin: 0;
  font-size: 0.9rem;
  color: var(--ink);
  line-height: 1.55;
}

.feedback-actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 0.1rem;
}

@media (max-width: 420px) {
  .feedback-compare {
    grid-template-columns: 1fr;
  }
}

.primary {
  appearance: none;
  border: none;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  font-size: 0.98rem;
  padding: 0.78rem 1.3rem;
  border-radius: 11px;
  cursor: pointer;
  width: 100%;
  transition: background 0.14s var(--ease), transform 0.1s var(--ease);
}

.primary:hover {
  background: var(--accent-deep);
}

.primary:active {
  transform: scale(0.985);
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pop-in {
  from {
    opacity: 0;
    transform: translateY(6px) scale(0.985);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}

@media (max-width: 480px) {
  .option {
    min-height: 3.4rem;
    padding: 1.05rem 1.1rem;
    font-size: 0.95rem;
  }

  .ghost {
    min-height: 2.5rem;
  }

  .input-shell {
    grid-template-columns: auto 1fr;
    grid-template-rows: 1fr auto;
  }

  .input-prompt {
    grid-row: 1;
  }

  .answer-input {
    grid-row: 1;
  }

  .input-submit {
    grid-column: 1 / -1;
    border-left: none;
    border-top: 1.5px solid var(--line);
    padding: 0.75rem 1rem;
  }

  .setting-toggle {
    margin-left: 0;
  }
}

@media (min-width: 540px) {
  .level-pick {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.85rem;
  }

  .level-card {
    padding: 1.05rem 1.1rem 1.1rem;
  }

  .level-title {
    font-size: 1.05rem;
  }

  .level-meta {
    font-size: 0.76rem;
  }
}

@media (min-width: 720px) {
  .screen {
    padding-top: 2.35rem;
  }
}

.menu-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  margin-top: 0.55rem;
}

.menu-actions-always {
  margin: 1rem 0 0.4rem;
}

.quiz-tool {
  font-size: 0.78rem;
  padding: 0.25rem 0.55rem;
  min-height: auto;
}

.brand-compact h1 {
  font-size: clamp(1.4rem, 4vw, 1.9rem);
  margin: 0.2rem 0 0.6rem;
}

.round-summary {
  background: var(--panel-strong);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem 1.3rem;
  margin-bottom: 1.2rem;
  box-shadow: var(--shadow);
}

.round-stat {
  margin: 0 0 0.55rem;
  font-size: 1.05rem;
}

.round-weak-label {
  margin: 1rem 0 0.4rem;
  font-weight: 600;
}

.round-weak-list {
  margin: 0;
  padding-left: 1.1rem;
}

.round-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.app-dialog {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  padding: 1.2rem;
  background: rgba(16, 32, 28, 0.45);
}

.app-dialog[hidden] {
  display: none !important;
}

.app-dialog-card {
  width: min(420px, 100%);
  background: var(--panel-strong);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 1.25rem 1.3rem 1.15rem;
  box-shadow: var(--shadow);
}

.app-dialog-title {
  margin: 0 0 0.45rem;
  font-size: 1.15rem;
}

.app-dialog-body {
  margin: 0 0 1rem;
  color: var(--ink-soft);
}

.app-dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.55rem;
}