:root {
  --ink: #17324d;
  --ink-soft: #516273;
  --cream: #fbf6e9;
  --paper: #fffdf7;
  --yellow: #f6c94f;
  --yellow-pale: #fff2bd;
  --coral: #ef765e;
  --coral-pale: #ffe1d8;
  --mint: #67b7a5;
  --mint-pale: #dff3ec;
  --blue: #6d9fd2;
  --blue-pale: #e0eef9;
  --line: rgba(23, 50, 77, 0.16);
  --shadow: 5px 6px 0 rgba(23, 50, 77, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 18px 18px, rgba(23, 50, 77, 0.055) 1.3px, transparent 1.5px) 0 0 / 36px 36px,
    var(--cream);
  color: var(--ink);
  font-family: "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", Arial, sans-serif;
}

button,
input,
select {
  font: inherit;
}

button {
  color: inherit;
}

button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 4px solid rgba(109, 159, 210, 0.35);
  outline-offset: 3px;
}

.app-shell {
  min-height: 100vh;
  overflow: hidden;
  position: relative;
}

.background-shape {
  align-items: center;
  border: 3px solid var(--ink);
  border-radius: 32% 68% 58% 42%;
  color: var(--ink);
  display: flex;
  font-size: 4rem;
  font-weight: 900;
  height: 130px;
  justify-content: center;
  opacity: 0.045;
  position: fixed;
  transform: rotate(13deg);
  width: 130px;
  z-index: 0;
}

.shape-one {
  left: -32px;
  top: 42%;
}

.shape-two {
  bottom: 8%;
  right: -28px;
  transform: rotate(-18deg);
}

.site-header,
.top-stats,
.main-nav,
.content-wrap,
footer {
  position: relative;
  z-index: 1;
}

.site-header {
  align-items: center;
  display: flex;
  justify-content: space-between;
  margin: 0 auto;
  max-width: 1180px;
  padding: 30px 28px 20px;
}

.brand-block,
.brand-mark,
.header-greeting,
.times-card-head,
.session-topbar,
.answer-row,
.result-actions,
.weak-panel-head {
  align-items: center;
  display: flex;
}

.brand-block {
  gap: 14px;
}

.brand-mark {
  background: var(--yellow);
  border: 2px solid var(--ink);
  border-radius: 18px 22px 16px 20px;
  box-shadow: 4px 4px 0 var(--ink);
  font-size: 1.15rem;
  font-weight: 900;
  gap: 4px;
  justify-content: center;
  min-height: 62px;
  transform: rotate(-2deg);
  width: 72px;
}

.brand-mark b {
  color: var(--coral);
}

.brand-block p,
.brand-block h1,
.header-greeting small,
.header-greeting strong,
.section-heading h2,
.section-heading p,
.setup-copy h2,
.setup-copy p,
.session-topbar h2,
.result-card h2,
.result-card p,
.weak-panel-head h3,
.weak-panel-head p {
  margin: 0;
}

.brand-block p {
  color: var(--coral);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.18em;
}

.brand-block h1 {
  font-size: clamp(1.55rem, 3vw, 2rem);
  font-weight: 950;
  letter-spacing: 0.05em;
  line-height: 1.08;
}

.header-greeting {
  background: rgba(255, 253, 247, 0.74);
  border: 1px solid var(--line);
  border-radius: 18px;
  cursor: pointer;
  gap: 11px;
  padding: 10px 15px;
  text-align: left;
  transition: background 150ms ease, border-color 150ms ease, transform 150ms ease;
}

.header-account-actions {
  align-items: center;
  display: flex;
  gap: 9px;
}

.reload-button {
  align-items: center;
  background: var(--yellow-pale);
  border: 1px solid rgba(23, 50, 77, 0.2);
  border-radius: 13px;
  color: var(--ink);
  cursor: pointer;
  display: inline-flex;
  font: inherit;
  font-size: 0.74rem;
  font-weight: 850;
  gap: 6px;
  justify-content: center;
  padding: 10px 11px;
  transition: background 150ms ease, border-color 150ms ease, transform 150ms ease;
}

.reload-button span {
  font-size: 1.05rem;
  line-height: 0.8;
}

.reload-button:hover {
  background: var(--yellow);
  border-color: rgba(23, 50, 77, 0.38);
  transform: translateY(-1px);
}

.header-greeting:hover:not(:disabled) {
  background: var(--paper);
  border-color: rgba(23, 50, 77, 0.32);
  transform: translateY(-1px);
}

.header-greeting.authenticated {
  background: var(--mint-pale);
  border-color: rgba(69, 168, 125, 0.35);
}

.connection-dot {
  background: #d19b36;
  border: 2px solid var(--paper);
  border-radius: 999px;
  box-shadow: 0 0 0 1px rgba(23, 50, 77, 0.15);
  height: 10px;
  width: 10px;
}

.connection-dot.connected {
  background: #45a87d;
}

.connection-dot.offline {
  background: var(--coral);
}

.header-greeting div,
.header-greeting .account-copy {
  display: grid;
  gap: 2px;
}

.header-greeting small {
  color: var(--ink-soft);
  font-size: 0.72rem;
}

.header-greeting strong {
  font-size: 0.92rem;
}

.account-arrow {
  color: var(--ink-soft);
  font-size: 1.4rem;
  font-weight: 900;
  line-height: 1;
  margin-left: 3px;
}

.top-stats {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(4, 1fr);
  margin: 0 auto 20px;
  max-width: 1180px;
  padding: 0 28px;
}

.mini-stat {
  background: var(--paper);
  border: 1.5px solid var(--line);
  border-radius: 16px;
  display: grid;
  gap: 4px;
  min-width: 0;
  padding: 13px 17px;
  position: relative;
  overflow: hidden;
}

.mini-stat::before {
  background: var(--tone-color);
  content: "";
  height: 100%;
  left: 0;
  position: absolute;
  top: 0;
  width: 6px;
}

.mini-stat span {
  color: var(--ink-soft);
  font-size: 0.74rem;
  font-weight: 700;
}

.mini-stat strong {
  font-size: 1.12rem;
  font-weight: 900;
  white-space: nowrap;
}

.tone-yellow { --tone-color: var(--yellow); }
.tone-mint { --tone-color: var(--mint); }
.tone-coral { --tone-color: var(--coral); }
.tone-blue { --tone-color: var(--blue); }

.main-nav {
  background: var(--paper);
  border: 2px solid var(--ink);
  border-radius: 20px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 8px;
  grid-template-columns: repeat(4, 1fr);
  margin: 0 auto 28px;
  max-width: 880px;
  padding: 8px;
}

.main-nav button {
  align-items: center;
  background: transparent;
  border: 0;
  border-radius: 14px;
  cursor: pointer;
  display: flex;
  font-size: 0.92rem;
  font-weight: 850;
  gap: 8px;
  justify-content: center;
  min-height: 48px;
  padding: 8px 14px;
  transition: transform 160ms ease, background 160ms ease;
}

.main-nav button:hover {
  background: rgba(246, 201, 79, 0.18);
  transform: translateY(-1px);
}

.main-nav button.active {
  background: var(--ink);
  color: white;
}

.main-nav button span {
  align-items: center;
  background: var(--yellow-pale);
  border-radius: 999px;
  color: var(--ink);
  display: flex;
  font-size: 0.72rem;
  height: 26px;
  justify-content: center;
  width: 26px;
}

.content-wrap {
  margin: 0 auto;
  max-width: 1180px;
  padding: 0 28px 60px;
}

.page-section {
  animation: reveal 300ms ease both;
}

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

.section-heading {
  align-items: flex-end;
  display: flex;
  gap: 24px;
  justify-content: space-between;
  margin-bottom: 25px;
}

.eyebrow {
  color: var(--coral);
  display: block;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.13em;
  margin-bottom: 7px;
}

.section-heading h2,
.setup-copy h2,
.session-topbar h2,
.result-card h2 {
  font-size: clamp(1.8rem, 4.5vw, 3rem);
  font-weight: 950;
  letter-spacing: -0.035em;
  line-height: 1.16;
}

.section-heading p,
.setup-copy p,
.result-card > p {
  color: var(--ink-soft);
  line-height: 1.75;
  margin-top: 8px;
  max-width: 640px;
}

.primary-button,
.secondary-button {
  border: 2px solid var(--ink);
  border-radius: 15px;
  cursor: pointer;
  font-weight: 900;
  min-height: 50px;
  padding: 12px 22px;
  transition: transform 150ms ease, box-shadow 150ms ease, opacity 150ms ease;
}

.primary-button {
  background: var(--yellow);
  box-shadow: 4px 4px 0 var(--ink);
}

.primary-button:hover:not(:disabled),
.secondary-button:hover:not(:disabled) {
  transform: translate(2px, 2px);
}

.primary-button:hover:not(:disabled) {
  box-shadow: 2px 2px 0 var(--ink);
}

.secondary-button {
  background: var(--paper);
}

.primary-button.compact,
.secondary-button.compact {
  min-height: 44px;
  padding: 9px 17px;
}

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

button:disabled {
  cursor: not-allowed;
  opacity: 0.44;
}

.times-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(3, 1fr);
}

.times-card {
  background: var(--paper);
  border: 2px solid var(--ink);
  border-radius: 22px;
  box-shadow: 5px 6px 0 color-mix(in srgb, var(--row-color) 70%, var(--ink));
  overflow: hidden;
  transition: transform 170ms ease;
}

.times-card:hover {
  transform: translateY(-4px) rotate(-0.3deg);
}

.times-card-head {
  background: color-mix(in srgb, var(--row-color) 70%, white);
  border-bottom: 2px solid var(--ink);
  gap: 12px;
  padding: 14px 16px;
}

.times-card-head > span {
  align-items: center;
  background: var(--paper);
  border: 2px solid var(--ink);
  border-radius: 999px;
  display: flex;
  font-family: "Kaiti TC", "STKaiti", serif;
  font-size: 1.35rem;
  font-weight: 900;
  height: 42px;
  justify-content: center;
  width: 42px;
}

.times-card-head div {
  display: grid;
  gap: 1px;
}

.times-card-head strong {
  font-size: 1.06rem;
  font-weight: 900;
}

.times-card-head small {
  color: var(--ink-soft);
}

.times-card ol {
  display: grid;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 8px 16px 14px;
}

.times-card li {
  align-items: baseline;
  border-bottom: 1px dashed var(--line);
  display: flex;
  justify-content: space-between;
  padding: 8px 2px;
}

.times-card li:last-child {
  border-bottom: 0;
}

.times-card li span {
  font-family: "Kaiti TC", "STKaiti", serif;
  font-size: 1.08rem;
  font-weight: 800;
}

.times-card li small {
  color: var(--ink-soft);
  font-size: 0.71rem;
  font-weight: 700;
}

.setup-layout {
  align-items: stretch;
  display: grid;
  gap: 30px;
  grid-template-columns: 0.88fr 1.12fr;
}

.setup-copy {
  background:
    linear-gradient(135deg, transparent 0 64%, rgba(255, 255, 255, 0.28) 64% 69%, transparent 69%),
    var(--ink);
  border: 2px solid var(--ink);
  border-radius: 26px;
  color: white;
  min-height: 470px;
  overflow: hidden;
  padding: clamp(30px, 6vw, 64px);
  position: relative;
}

.setup-copy::after {
  align-items: center;
  background: var(--yellow);
  border: 3px solid white;
  border-radius: 42% 58% 51% 49%;
  bottom: 30px;
  color: var(--ink);
  content: "9 × 8";
  display: flex;
  font-size: 1.5rem;
  font-weight: 950;
  height: 108px;
  justify-content: center;
  position: absolute;
  right: 36px;
  transform: rotate(-8deg);
  width: 108px;
}

.setup-copy .eyebrow {
  color: var(--yellow);
}

.setup-copy p {
  color: rgba(255, 255, 255, 0.77);
  max-width: 470px;
}

.rule-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 28px;
  max-width: 340px;
}

.rule-pills span {
  border: 1px solid rgba(255, 255, 255, 0.34);
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 7px 11px;
}

.setup-card,
.option-card {
  background: var(--paper);
  border: 2px solid var(--ink);
  border-radius: 26px;
  box-shadow: var(--shadow);
}

.setup-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  justify-content: center;
  padding: clamp(24px, 5vw, 42px);
}

.milestone-summary {
  background: var(--blue-pale);
  border: 1.5px solid color-mix(in srgb, var(--blue) 48%, var(--line));
  border-radius: 16px;
  display: grid;
  gap: 10px;
  margin-top: 4px;
  padding: 14px 15px;
}

.milestone-summary > span {
  font-size: 0.82rem;
  font-weight: 900;
}

.milestone-summary > span small {
  color: var(--ink-soft);
  font-size: 0.7rem;
  margin-left: 5px;
}

.milestone-summary > div {
  display: grid;
  gap: 8px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.milestone-summary p {
  background: rgba(255, 255, 255, 0.7);
  border-radius: 11px;
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 9px 10px;
}

.milestone-summary p small,
.milestone-summary p em {
  color: var(--ink-soft);
  font-size: 0.63rem;
  font-style: normal;
  font-weight: 750;
}

.milestone-summary p strong {
  font-size: 1.05rem;
  font-weight: 950;
}

.row-picker {
  border: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin: 0 0 12px;
  padding: 0;
}

.row-picker legend {
  font-size: 0.88rem;
  font-weight: 850;
  margin-bottom: 13px;
  width: 100%;
}

.row-chip {
  background: white;
  border: 1.5px solid var(--line);
  border-radius: 12px;
  cursor: pointer;
  font-size: 0.84rem;
  font-weight: 850;
  min-height: 43px;
  min-width: 56px;
  padding: 8px 12px;
  transition: 140ms ease;
}

.row-chip:hover {
  border-color: var(--ink);
  transform: translateY(-1px);
}

.row-chip.selected {
  background: var(--yellow);
  border-color: var(--ink);
  box-shadow: 2px 3px 0 var(--ink);
}

.row-chip.all-chip {
  min-width: 70px;
}

.session-layout {
  margin: 0 auto;
  max-width: 900px;
}

.session-topbar {
  justify-content: space-between;
  margin-bottom: 20px;
}

.session-topbar > div:first-child {
  display: grid;
  gap: 10px;
}

.session-topbar h2 {
  font-size: clamp(1.45rem, 4vw, 2.35rem);
}

.live-badge {
  align-items: center;
  background: var(--mint-pale);
  border: 1px solid color-mix(in srgb, var(--mint) 60%, white);
  border-radius: 999px;
  display: inline-flex;
  font-size: 0.75rem;
  font-weight: 850;
  gap: 7px;
  justify-self: start;
  padding: 6px 10px;
}

.live-badge i {
  animation: pulse 1.6s ease infinite;
  background: var(--mint);
  border-radius: 999px;
  height: 8px;
  width: 8px;
}

.live-badge.test {
  background: var(--coral-pale);
  border-color: rgba(239, 118, 94, 0.4);
}

.live-badge.test i {
  background: var(--coral);
}

@keyframes pulse {
  50% { box-shadow: 0 0 0 5px rgba(103, 183, 165, 0.14); }
}

.text-button,
.quiet-danger {
  background: transparent;
  border: 0;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 850;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.session-stats,
.result-stats {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(4, 1fr);
  margin-bottom: 20px;
}

.practice-session-stats {
  grid-template-columns: repeat(auto-fit, minmax(115px, 1fr));
}

.practice-breakdown {
  grid-template-columns: repeat(auto-fit, minmax(115px, 1fr));
}

.result-streak-note {
  color: var(--ink-soft);
  font-size: 0.8rem;
  font-weight: 800;
  margin: -4px 0 20px !important;
}

.result-point-detail + .result-streak-note {
  margin-top: 18px !important;
}

.question-card {
  background: var(--paper);
  border: 2px solid var(--ink);
  border-radius: 28px;
  box-shadow: 8px 9px 0 var(--blue);
  min-height: 430px;
  padding: clamp(24px, 6vw, 52px);
  position: relative;
  text-align: center;
  transition: box-shadow 180ms ease, transform 180ms ease;
}

.question-card.wrong {
  animation: shake 250ms ease;
  box-shadow: 8px 9px 0 var(--coral);
}

.question-card.wrong .equation b {
  color: var(--coral);
}

.question-card.correct {
  box-shadow: 8px 9px 0 var(--mint);
  transform: translateY(-2px);
}

@keyframes shake {
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

.question-label {
  background: var(--blue-pale);
  border-radius: 999px;
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  padding: 6px 13px;
}

.question-timer {
  margin: 18px auto 0;
  max-width: 480px;
}

.question-timer > div:first-child {
  align-items: center;
  display: flex;
  justify-content: space-between;
  margin-bottom: 7px;
}

.question-timer > div:first-child span {
  color: #34866d;
  font-size: 0.75rem;
  font-weight: 900;
}

.question-timer > div:first-child strong {
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
}

.question-timer-track {
  background: var(--mint-pale);
  border: 1px solid rgba(23, 50, 77, 0.16);
  border-radius: 999px;
  height: 12px;
  overflow: visible;
  position: relative;
}

.question-timer-track > span {
  background: var(--mint);
  border-radius: inherit;
  display: block;
  height: 100%;
  transition: background 180ms ease, width 100ms linear;
}

.question-timer-track > i {
  background: var(--ink);
  border: 2px solid var(--paper);
  border-radius: 999px;
  height: 18px;
  left: 50%;
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 4px;
}

.question-timer small {
  color: var(--ink-soft);
  display: block;
  font-size: 0.68rem;
  margin-top: 6px;
  text-align: left;
}

.question-timer.slow > div:first-child span,
.question-timer.timeout > div:first-child span {
  color: #c9533d;
}

.question-timer.slow .question-timer-track > span {
  background: var(--yellow);
}

.question-timer.timeout .question-timer-track > span {
  background: var(--coral);
}

.equation {
  align-items: center;
  display: flex;
  gap: clamp(9px, 3vw, 22px);
  justify-content: center;
  margin: 22px 0 28px;
}

.equation strong,
.equation b {
  font-size: clamp(3.2rem, 11vw, 6rem);
  font-weight: 950;
  letter-spacing: -0.06em;
  line-height: 1;
}

.equation span {
  color: var(--coral);
  font-size: clamp(2rem, 6vw, 3.8rem);
  font-weight: 850;
}

.equation b {
  color: var(--blue);
}

.answer-form {
  margin: 0 auto;
  max-width: 480px;
}

.answer-form label {
  display: block;
  font-size: 0.8rem;
  font-weight: 800;
  margin-bottom: 8px;
  text-align: left;
}

.answer-row {
  gap: 10px;
}

.answer-row input {
  background: white;
  border: 2px solid var(--ink);
  border-radius: 15px;
  color: var(--ink);
  font-size: 1.8rem;
  font-weight: 900;
  height: 58px;
  min-width: 0;
  text-align: center;
  width: 100%;
}

.answer-row .primary-button {
  height: 58px;
  white-space: nowrap;
}

.feedback {
  color: var(--ink-soft);
  font-size: 0.82rem;
  font-weight: 750;
  margin-top: 17px;
  min-height: 22px;
}

.feedback.correct {
  color: #34866d;
}

.feedback.wrong {
  color: #c9533d;
}

.test-setup {
  background: rgba(255, 253, 247, 0.54);
  border: 1px solid var(--line);
  border-radius: 30px;
  padding: clamp(22px, 5vw, 46px);
}

.test-ticket {
  align-items: center;
  background: var(--coral);
  border: 2px solid var(--ink);
  border-radius: 18px;
  box-shadow: 4px 5px 0 var(--ink);
  color: white;
  display: flex;
  flex-direction: column;
  height: 98px;
  justify-content: center;
  transform: rotate(3deg);
  width: 112px;
}

.test-ticket strong {
  font-size: 2rem;
  line-height: 1;
}

.test-ticket span {
  font-size: 0.75rem;
  font-weight: 800;
  margin-top: 5px;
}

.test-options {
  display: grid;
  gap: 20px;
  grid-template-columns: 0.85fr 1.15fr;
}

.option-card {
  box-shadow: none;
  padding: 25px;
}

.option-card h3 {
  align-items: center;
  display: flex;
  font-size: 1rem;
  gap: 9px;
  margin: 0 0 20px;
}

.option-card h3 span {
  align-items: center;
  background: var(--yellow);
  border: 1.5px solid var(--ink);
  border-radius: 999px;
  display: flex;
  height: 30px;
  justify-content: center;
  width: 30px;
}

.count-grid {
  display: grid;
  gap: 9px;
  grid-template-columns: repeat(5, 1fr);
}

.count-grid button {
  background: white;
  border: 1.5px solid var(--line);
  border-radius: 12px;
  cursor: pointer;
  display: grid;
  min-height: 58px;
  padding: 7px;
}

.count-grid button.selected {
  background: var(--yellow);
  border-color: var(--ink);
  box-shadow: 2px 3px 0 var(--ink);
}

.count-grid strong {
  font-size: 1.1rem;
}

.count-grid small {
  color: var(--ink-soft);
  font-size: 0.68rem;
}

.option-note {
  background: var(--yellow-pale);
  border-radius: 10px;
  color: var(--ink-soft);
  font-size: 0.73rem;
  line-height: 1.55;
  margin: 16px 0 0;
  padding: 9px 11px;
}

.test-start {
  display: block;
  margin: 28px auto 0;
  min-width: 280px;
}

.timer-box {
  background: var(--paper);
  border: 1.5px solid var(--line);
  border-radius: 14px;
  display: grid;
  min-width: 120px;
  padding: 10px 15px;
  text-align: right;
}

.timer-box small {
  color: var(--ink-soft);
  font-size: 0.68rem;
}

.timer-box strong {
  font-size: 1.18rem;
}

.timer-box.overtime {
  background: #fff1ef;
  border-color: var(--coral);
}

.timer-box.overtime small,
.timer-box.overtime strong {
  color: #b63f35;
}

.progress-track,
.mastery-track {
  background: rgba(23, 50, 77, 0.1);
  border-radius: 999px;
  overflow: hidden;
}

.progress-track {
  height: 12px;
  margin-bottom: 24px;
}

.progress-track span {
  background: var(--coral);
  border-radius: inherit;
  display: block;
  height: 100%;
  transition: width 300ms ease;
}

.test-session .question-card {
  box-shadow: 8px 9px 0 var(--coral);
}

.quiet-danger {
  color: #9a4a3e;
  display: block;
  margin: 24px auto 0;
}

.result-card {
  background: var(--paper);
  border: 2px solid var(--ink);
  border-radius: 28px;
  box-shadow: 8px 9px 0 var(--yellow);
  margin: 0 auto;
  max-width: 820px;
  padding: clamp(30px, 7vw, 65px);
  text-align: center;
}

.result-mark {
  align-items: center;
  background: var(--yellow);
  border: 2px solid var(--ink);
  border-radius: 45% 55% 47% 53%;
  display: flex;
  font-family: "Kaiti TC", "STKaiti", serif;
  font-size: 2.1rem;
  font-weight: 900;
  height: 78px;
  justify-content: center;
  margin: 0 auto 24px;
  transform: rotate(-6deg);
  width: 78px;
}

.result-card .eyebrow {
  margin-top: 8px;
}

.result-card > p {
  margin-left: auto;
  margin-right: auto;
}

.result-stats {
  margin: 32px 0 0;
}

.result-stats.three {
  grid-template-columns: repeat(3, 1fr);
}

.result-point-change {
  align-content: center;
  display: grid;
  gap: 7px;
  justify-items: center;
  min-width: 0;
  padding: 8px;
}

.result-point-change > span {
  color: var(--ink-soft);
  font-size: 0.72rem;
  font-weight: 850;
}

.points-change-badge {
  align-items: center;
  background: #ffc21c;
  border-radius: 8px;
  color: var(--ink);
  display: inline-flex;
  font-size: 1.18rem;
  font-weight: 950;
  gap: 7px;
  line-height: 1;
  padding: 8px 12px;
  position: relative;
}

.points-change-badge::before {
  border-bottom: 7px solid #ffc21c;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  content: "";
  left: 15px;
  position: absolute;
  top: -6px;
}

.points-change-badge i {
  font-size: 1.35rem;
  font-style: normal;
  line-height: 1;
}

.points-change-badge b {
  font: inherit;
}

.result-point-detail {
  background: #fff;
  border: 1px solid rgba(109, 159, 210, 0.34);
  border-radius: 20px;
  box-shadow: 0 12px 30px rgba(23, 50, 77, 0.08);
  margin: 22px auto 0;
  max-width: 720px;
  overflow: hidden;
  text-align: left;
  width: 100%;
}

.result-point-detail-head {
  align-items: center;
  background: linear-gradient(135deg, var(--blue-pale), rgba(223, 243, 236, 0.72));
  border-bottom: 1px solid rgba(109, 159, 210, 0.26);
  display: flex;
  gap: 20px;
  justify-content: space-between;
  padding: 15px 18px;
}

.result-point-detail-head span {
  color: var(--ink-soft);
  display: block;
  font-size: 0.68rem;
  font-weight: 850;
  letter-spacing: 0.08em;
}

.result-point-detail-head h3 {
  font-size: 1rem;
  margin: 3px 0 0;
}

.result-point-detail-head > strong {
  color: var(--blue);
  font-size: 1.2rem;
  white-space: nowrap;
}

.result-point-detail-list {
  display: grid;
}

.result-point-detail-row {
  align-items: center;
  display: flex;
  gap: 20px;
  justify-content: space-between;
  padding: 12px 18px;
}

.result-point-detail-row + .result-point-detail-row {
  border-top: 1px solid var(--line);
}

.result-point-detail-row span {
  color: var(--ink-soft);
  font-size: 0.8rem;
  font-weight: 750;
}

.result-point-detail-row strong {
  color: var(--mint);
  font-size: 0.88rem;
  white-space: nowrap;
}

.result-point-detail-row strong.negative {
  color: var(--coral);
}

.result-point-detail-empty {
  color: var(--ink-soft);
  font-size: 0.8rem;
  font-weight: 750;
  margin: 0;
  padding: 17px 18px;
}

.result-actions {
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 28px;
}

.saving-note {
  color: var(--ink-soft);
  display: block;
  margin-top: 15px;
}

.score-ring {
  align-items: center;
  background: conic-gradient(var(--mint) var(--score), rgba(23, 50, 77, 0.09) 0);
  border: 2px solid var(--ink);
  border-radius: 999px;
  display: flex;
  height: 148px;
  justify-content: center;
  margin: 0 auto 26px;
  position: relative;
  width: 148px;
}

.score-ring::before {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
  content: "";
  inset: 13px;
  position: absolute;
}

.score-ring div {
  align-items: baseline;
  display: flex;
  position: relative;
  z-index: 1;
}

.score-ring strong {
  font-size: 3rem;
  line-height: 1;
}

.score-ring span {
  font-size: 0.8rem;
  font-weight: 850;
}

.mistake-box {
  align-items: flex-start;
  background: var(--coral-pale);
  border: 1.5px solid rgba(239, 118, 94, 0.45);
  border-radius: 18px;
  display: flex;
  gap: 20px;
  justify-content: space-between;
  margin-top: 24px;
  padding: 18px;
  text-align: left;
}

.mistake-box h3,
.mistake-box p {
  margin: 0;
}

.mistake-box h3 {
  font-size: 0.95rem;
}

.mistake-box p {
  color: var(--ink-soft);
  font-size: 0.75rem;
  margin-top: 3px;
}

.mistake-list {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  justify-content: flex-end;
  max-width: 55%;
}

.mistake-list span {
  background: var(--paper);
  border: 1px solid rgba(23, 50, 77, 0.18);
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 850;
  padding: 6px 9px;
}

.perfect-note {
  background: var(--mint-pale);
  border-radius: 16px;
  color: #2e795f;
  font-weight: 850;
  margin-top: 25px;
  padding: 16px;
}

.record-summary-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: 1.35fr 1fr 1fr;
  margin-bottom: 24px;
}

.record-account-bar {
  align-items: center;
  background: var(--mint-pale);
  border: 1.5px solid rgba(69, 168, 125, 0.38);
  border-radius: 17px;
  display: flex;
  justify-content: space-between;
  margin-bottom: 18px;
  padding: 13px 16px;
}

.record-account-bar > div {
  align-items: baseline;
  display: flex;
  flex-wrap: wrap;
  gap: 7px 11px;
}

.record-account-bar span,
.record-account-bar small {
  color: var(--ink-soft);
  font-size: 0.72rem;
}

.record-account-bar strong {
  font-size: 0.92rem;
}

.record-detail-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr 1fr;
  margin-bottom: 24px;
}

.history-panel {
  background: var(--paper);
  border: 2px solid var(--ink);
  border-radius: 22px;
  min-width: 0;
  padding: 22px;
}

.history-panel-head {
  align-items: flex-end;
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  padding-bottom: 15px;
}

.history-panel-head span {
  color: var(--coral);
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.history-panel-head h3 {
  font-size: 1.15rem;
  margin: 3px 0 0;
}

.history-panel-head small {
  color: var(--ink-soft);
  font-size: 0.68rem;
}

.daily-record-list,
.test-history-list {
  display: grid;
  max-height: 430px;
  overflow: auto;
}

.daily-record-list article,
.test-history-list article {
  border-bottom: 1px dashed var(--line);
}

.daily-record-list article:last-child,
.test-history-list article:last-child {
  border-bottom: 0;
}

.daily-record-list article {
  align-items: center;
  display: flex;
  gap: 16px;
  justify-content: space-between;
  padding: 14px 3px;
}

.daily-record-date {
  display: grid;
  gap: 3px;
  min-width: 84px;
}

.daily-record-date strong {
  font-size: 0.9rem;
}

.daily-record-date span {
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 900;
}

.daily-record-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.daily-record-metrics span {
  background: var(--cream);
  border-radius: 999px;
  color: var(--ink-soft);
  font-size: 0.68rem;
  padding: 6px 8px;
}

.daily-record-metrics b {
  color: var(--ink);
}

.test-history-list article {
  align-items: center;
  display: grid;
  gap: 11px;
  grid-template-columns: auto 1fr auto;
  padding: 13px 3px;
}

.test-history-score {
  align-items: baseline;
  background: var(--yellow-pale);
  border: 1px solid rgba(23, 50, 77, 0.15);
  border-radius: 12px;
  display: flex;
  min-width: 55px;
  padding: 8px;
}

.test-history-score strong {
  font-size: 1.18rem;
}

.test-history-score span {
  font-size: 0.64rem;
  font-weight: 850;
}

.test-history-main {
  display: grid;
  gap: 3px;
  min-width: 0;
}

.test-history-main strong {
  font-size: 0.8rem;
}

.test-history-main span {
  color: var(--ink-soft);
  font-size: 0.68rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.test-history-result {
  display: grid;
  font-size: 0.68rem;
  gap: 4px;
  text-align: right;
}

.test-history-result span:first-child { color: #34866d; }
.test-history-result span:last-child { color: #c9533d; }

.history-empty {
  color: var(--ink-soft);
  font-size: 0.78rem;
  line-height: 1.6;
  margin: 0;
  padding: 28px 4px 14px;
}

.record-big-card {
  border: 2px solid var(--ink);
  border-radius: 22px;
  display: grid;
  min-height: 170px;
  padding: 25px;
}

.record-big-card.blue { background: var(--blue-pale); }
.record-big-card.mint { background: var(--mint-pale); }
.record-big-card.yellow { background: var(--yellow-pale); }

.record-big-card > span {
  font-size: 0.8rem;
  font-weight: 800;
}

.record-big-card > strong {
  align-self: center;
  font-size: clamp(2.2rem, 6vw, 3.7rem);
  font-weight: 950;
  letter-spacing: -0.05em;
}

.record-big-card small {
  align-self: end;
  color: var(--ink-soft);
}

.weak-panel {
  background: var(--paper);
  border: 2px solid var(--ink);
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: clamp(20px, 4vw, 34px);
}

.weak-panel-head {
  justify-content: space-between;
  margin-bottom: 20px;
}

.weak-panel-head h3 {
  font-size: 1.25rem;
}

.weak-panel-head p {
  color: var(--ink-soft);
  font-size: 0.78rem;
  margin-top: 4px;
}

.weak-panel-head > span {
  background: var(--coral-pale);
  border-radius: 999px;
  color: #ad4e3b;
  font-size: 0.72rem;
  font-weight: 850;
  padding: 7px 11px;
}

.weak-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(4, 1fr);
}

.weak-grid article {
  background: #fffaf1;
  border: 1.5px solid var(--line);
  border-radius: 16px;
  padding: 15px;
}

.weak-equation {
  font-size: 1.45rem;
  font-weight: 950;
  margin-bottom: 10px;
}

.weak-meta {
  display: flex;
  font-size: 0.68rem;
  justify-content: space-between;
  margin-bottom: 8px;
}

.weak-meta span {
  color: var(--ink-soft);
}

.mastery-track {
  height: 7px;
}

.mastery-track span {
  background: var(--mint);
  display: block;
  height: 100%;
}

.weak-grid article > small {
  color: var(--coral);
  display: block;
  font-size: 0.66rem;
  font-weight: 850;
  margin-top: 7px;
}

.empty-record {
  padding: 35px 20px 20px;
  text-align: center;
}

.empty-record > div {
  align-items: center;
  background: var(--mint-pale);
  border: 2px solid var(--ink);
  border-radius: 999px;
  display: flex;
  font-size: 1.6rem;
  height: 60px;
  justify-content: center;
  margin: 0 auto 15px;
  width: 60px;
}

.empty-record h3,
.empty-record p {
  margin: 0;
}

.empty-record p {
  color: var(--ink-soft);
  font-size: 0.82rem;
  margin: 5px 0 18px;
}

footer {
  align-items: center;
  border-top: 1px solid var(--line);
  display: flex;
  gap: 12px;
  justify-content: center;
  margin: 0 auto;
  max-width: 1120px;
  padding: 25px 28px 35px;
}

.footer-mark {
  background: var(--yellow);
  border: 1.5px solid var(--ink);
  border-radius: 9px;
  font-size: 0.72rem;
  font-weight: 950;
  padding: 5px 7px;
  transform: rotate(-3deg);
}

footer p {
  color: var(--ink-soft);
  font-size: 0.76rem;
  font-weight: 700;
  margin: 0;
}

.auth-overlay {
  align-items: center;
  background: rgba(23, 50, 77, 0.48);
  display: flex;
  inset: 0;
  justify-content: center;
  padding: 22px;
  position: fixed;
  z-index: 50;
}

.auth-dialog {
  animation: auth-pop 180ms ease both;
  background: var(--paper);
  border: 2px solid var(--ink);
  border-radius: 25px;
  box-shadow: 8px 9px 0 var(--ink);
  max-height: calc(100vh - 44px);
  max-width: 510px;
  overflow: auto;
  padding: 34px;
  position: relative;
  width: 100%;
}

@keyframes auth-pop {
  from { opacity: 0; transform: translateY(10px) scale(0.985); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.auth-close {
  align-items: center;
  background: var(--cream);
  border: 1.5px solid var(--ink);
  border-radius: 999px;
  cursor: pointer;
  display: flex;
  font-size: 1.25rem;
  height: 34px;
  justify-content: center;
  line-height: 1;
  position: absolute;
  right: 18px;
  top: 18px;
  width: 34px;
}

.auth-dialog h2,
.auth-dialog p {
  margin: 0;
}

.auth-dialog h2 {
  font-size: clamp(1.65rem, 6vw, 2.35rem);
  font-weight: 950;
  letter-spacing: -0.04em;
  line-height: 1.15;
  padding-right: 36px;
}

.auth-intro {
  color: var(--ink-soft);
  line-height: 1.65;
  margin-top: 9px !important;
}

.auth-tabs {
  background: var(--cream);
  border: 1px solid var(--line);
  border-radius: 14px;
  display: grid;
  gap: 5px;
  grid-template-columns: 1fr 1fr;
  margin: 23px 0 18px;
  padding: 5px;
}

.auth-tabs button {
  background: transparent;
  border: 0;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 900;
  padding: 10px 14px;
}

.auth-tabs button.selected {
  background: var(--paper);
  box-shadow: 0 2px 7px rgba(23, 50, 77, 0.12);
}

.auth-form {
  display: grid;
  gap: 14px;
}

.auth-form label {
  display: grid;
  gap: 6px;
}

.auth-form label > span {
  font-size: 0.78rem;
  font-weight: 900;
}

.auth-form label small {
  color: var(--ink-soft);
  font-weight: 650;
}

.auth-form input,
.auth-form select {
  background: #fff;
  border: 1.5px solid rgba(23, 50, 77, 0.3);
  border-radius: 12px;
  color: var(--ink);
  min-height: 47px;
  padding: 10px 12px;
  width: 100%;
}

.auth-form input:focus,
.auth-form select:focus {
  border-color: var(--blue);
}

.auth-form-row {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr 1fr;
}

.auth-form .primary-button {
  margin-top: 4px;
}

.auth-status,
.auth-service-note,
.shared-account-note {
  border-radius: 12px;
  font-size: 0.8rem;
  line-height: 1.55;
  padding: 11px 13px;
}

.auth-status {
  background: var(--coral-pale);
  color: #9b382b;
  font-weight: 800;
  margin-top: 13px !important;
}

.auth-service-note {
  background: var(--yellow-pale);
  margin-bottom: 15px;
}

.auth-member-panel {
  text-align: center;
}

.auth-member-mark {
  align-items: center;
  background: var(--yellow);
  border: 2px solid var(--ink);
  border-radius: 999px;
  box-shadow: 3px 3px 0 var(--ink);
  display: flex;
  font-size: 1.35rem;
  font-weight: 950;
  height: 58px;
  justify-content: center;
  margin: 0 auto 18px;
  transform: rotate(-4deg);
  width: 58px;
}

.auth-member-panel .eyebrow {
  letter-spacing: 0.08em;
}

.auth-member-panel h2 {
  padding: 0;
}

.auth-member-panel > p:not(.auth-status) {
  color: var(--ink-soft);
  margin-top: 7px;
}

.member-rewards {
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr 1fr;
  margin-top: 18px;
  text-align: left;
}

.member-rewards > div {
  background: var(--cream);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 11px 12px;
}

.member-rewards span {
  color: var(--ink-soft);
  display: block;
  font-size: 0.7rem;
  font-weight: 800;
  margin-bottom: 3px;
}

.member-rewards strong {
  font-size: 0.92rem;
}

.shared-account-note {
  background: var(--mint-pale);
  margin: 20px 0;
  text-align: left;
}

@media (max-width: 900px) {
  .times-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .setup-layout,
  .test-options {
    grid-template-columns: 1fr;
  }

  .setup-copy {
    min-height: 360px;
  }

  .record-summary-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .record-big-card:first-child {
    grid-column: span 2;
  }

  .weak-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .practice-session-stats {
    grid-template-columns: repeat(3, 1fr);
  }

  .practice-breakdown {
    grid-template-columns: repeat(3, 1fr);
  }

  .record-detail-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .site-header {
    padding: 20px 17px 14px;
  }

  .brand-mark {
    min-height: 52px;
    width: 60px;
  }

  .header-greeting {
    background: transparent;
    border: 0;
    padding: 4px;
  }

  .header-account-actions {
    gap: 5px;
  }

  .reload-button {
    height: 40px;
    padding: 8px;
    width: 40px;
  }

  .reload-button b {
    display: none;
  }

  .account-arrow {
    display: none;
  }

  .header-greeting small,
  .header-greeting strong {
    max-width: 130px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .top-stats {
    gap: 8px;
    grid-template-columns: repeat(4, minmax(105px, 1fr));
    overflow-x: auto;
    padding: 0 17px;
  }

  .mini-stat {
    padding: 11px 10px 11px 14px;
  }

  .mini-stat span {
    font-size: 0.64rem;
  }

  .mini-stat strong {
    font-size: 0.87rem;
  }

  .main-nav {
    border-left: 0;
    border-radius: 0;
    border-right: 0;
    box-shadow: 0 4px 0 rgba(23, 50, 77, 0.1);
    margin-bottom: 24px;
    max-width: none;
    padding: 6px 10px;
  }

  .main-nav button {
    flex-direction: column;
    font-size: 0.72rem;
    gap: 3px;
    min-height: 55px;
    padding: 5px 2px;
  }

  .main-nav button span {
    height: 22px;
    width: 22px;
  }

  .content-wrap {
    padding: 0 16px 45px;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .times-grid {
    grid-template-columns: 1fr;
  }

  .times-card li {
    padding: 9px 2px;
  }

  .setup-copy {
    min-height: 380px;
    padding: 34px 27px;
  }

  .setup-copy::after {
    bottom: 25px;
    height: 92px;
    right: 25px;
    width: 92px;
  }

  .setup-card,
  .option-card,
  .test-setup {
    padding: 20px;
  }

  .row-chip {
    flex: 1 0 calc(20% - 9px);
    min-width: 50px;
    padding: 7px;
  }

  .session-topbar {
    align-items: flex-start;
    gap: 12px;
  }

  .session-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .practice-session-stats,
  .practice-breakdown {
    grid-template-columns: repeat(2, 1fr);
  }

  .question-card {
    min-height: 390px;
    padding: 27px 17px;
  }

  .equation {
    gap: 9px;
  }

  .answer-row {
    align-items: stretch;
    flex-direction: column;
  }

  .answer-row input,
  .answer-row .primary-button {
    width: 100%;
  }

  .test-ticket {
    height: 78px;
    width: 92px;
  }

  .count-grid {
    grid-template-columns: repeat(5, 1fr);
    gap: 6px;
  }

  .count-grid button {
    min-height: 52px;
    padding: 5px;
  }

  .test-start {
    min-width: 0;
    width: 100%;
  }

  .result-stats,
  .result-stats.three {
    grid-template-columns: repeat(2, 1fr);
  }

  .mistake-box {
    flex-direction: column;
  }

  .mistake-list {
    justify-content: flex-start;
    max-width: none;
  }

  .record-summary-grid {
    grid-template-columns: 1fr;
  }

  .record-big-card:first-child {
    grid-column: auto;
  }

  .record-big-card {
    min-height: 140px;
  }

  .record-account-bar {
    align-items: stretch;
    flex-direction: column;
    gap: 11px;
  }

  .daily-record-list article {
    align-items: flex-start;
    flex-direction: column;
    gap: 9px;
  }

  .daily-record-metrics {
    justify-content: flex-start;
  }

  .weak-panel-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .weak-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .auth-overlay {
    align-items: flex-end;
    padding: 12px;
  }

  .auth-dialog {
    border-radius: 22px;
    max-height: calc(100vh - 24px);
    padding: 28px 22px 24px;
  }
}

@media (max-width: 420px) {
  .brand-block p {
    display: none;
  }

  .brand-block h1 {
    font-size: 1.35rem;
  }

  .header-greeting small {
    display: none;
  }

  .top-stats {
    overflow-x: auto;
  }

  .mini-stat {
    min-width: 105px;
  }

  .count-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .equation strong,
  .equation b {
    font-size: 3.1rem;
  }

  .equation span {
    font-size: 2rem;
  }

  .result-stats,
  .result-stats.three,
  .weak-grid {
    grid-template-columns: 1fr;
  }

  .auth-form-row {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

/* Local PHP/HTML entry enhancements. */
[hidden] {
  display: none !important;
}

.home-link {
  color: var(--ink-soft);
  font-size: 0.76rem;
  font-weight: 850;
  padding: 9px 5px;
  text-decoration: none;
}

.home-link:hover {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.service-banner {
  align-items: center;
  background: var(--coral-pale);
  border: 1.5px solid rgba(239, 118, 94, 0.46);
  border-radius: 15px;
  display: flex;
  gap: 10px 16px;
  margin: 0 auto 16px;
  max-width: 1124px;
  padding: 11px 15px;
  position: relative;
  z-index: 2;
}

.service-banner strong {
  font-size: 0.8rem;
}

.service-banner span {
  color: var(--ink-soft);
  flex: 1;
  font-size: 0.74rem;
}

.service-banner button {
  background: var(--paper);
  border: 1px solid var(--ink);
  border-radius: 9px;
  cursor: pointer;
  font-size: 0.7rem;
  font-weight: 850;
  padding: 7px 10px;
}

.app-toast {
  background: var(--ink);
  border: 2px solid var(--paper);
  border-radius: 13px;
  bottom: 20px;
  box-shadow: 4px 5px 0 rgba(23, 50, 77, 0.22);
  color: white;
  font-size: 0.8rem;
  font-weight: 800;
  left: 50%;
  max-width: calc(100% - 32px);
  padding: 11px 15px;
  position: fixed;
  text-align: center;
  transform: translateX(-50%);
  z-index: 80;
}

@media (max-width: 680px) {
  .home-link {
    display: none;
  }

  .service-banner {
    align-items: flex-start;
    border-left: 0;
    border-radius: 0;
    border-right: 0;
    flex-wrap: wrap;
    margin-bottom: 12px;
  }
}