/*
 * 練習頁共用版型
 *
 * 這裡只負責階段頁的外框、路線與工作區；各章的 main 內容仍由該章
 * 自己的 HTML/CSS/JavaScript 負責，避免把章節專屬互動誤抽成共用元件。
 */
:root {
  color-scheme: light;
  --practice-standard-bg: #edf3ef;
  --practice-standard-surface: #fffdf7;
  --practice-standard-surface-strong: #ffffff;
  --practice-standard-text: #17201d;
  --practice-standard-muted: #5d6b64;
  --practice-standard-line: #c9d7cf;
  --practice-standard-accent: #0b7655;
  --practice-standard-accent-strong: #07533d;
  --practice-standard-accent-soft: #e2f1e9;
  --practice-standard-warm: #f5c851;
  --practice-standard-shadow: 0 18px 50px rgb(23 32 29 / 10%);
}

body:has(.practice-standard) {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
}

:where(body:has(.practice-standard)) {
  background: radial-gradient(circle at 92% 6%, rgb(245 200 81 / 18%), transparent 26rem), var(--practice-standard-bg);
  color: var(--practice-standard-text);
}

.practice-standard,
.practice-standard * {
  box-sizing: border-box;
}

.practice-standard {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 20px 0 44px;
}

.practice-standard__hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: end;
  padding: clamp(30px, 6vw, 66px) clamp(22px, 5vw, 62px) 42px;
  border: 1px solid var(--practice-standard-line);
  border-radius: 28px;
  background: linear-gradient(135deg, rgb(255 253 247 / 98%), rgb(244 250 246 / 95%));
  box-shadow: var(--practice-standard-shadow);
}

.practice-standard__eyebrow,
.practice-standard__label {
  margin: 0 0 10px;
  color: var(--practice-standard-accent-strong);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  line-height: 1.3;
}

.practice-standard__title {
  max-width: 18ch;
  margin: 0;
  color: var(--practice-standard-text);
  font-size: clamp(2rem, 5vw, 4.7rem);
  letter-spacing: -0.045em;
  line-height: 1.15;
}

.practice-standard__lead {
  max-width: 52rem;
  margin: 22px 0 0;
  color: var(--practice-standard-muted);
  font-size: clamp(1.05rem, 2vw, 1.28rem);
  line-height: 1.75;
}

.practice-standard__badge {
  display: grid;
  min-width: 172px;
  gap: 5px;
  padding: 20px;
  border: 1px solid var(--practice-standard-accent);
  border-radius: 20px;
  background: var(--practice-standard-accent);
  color: #ffffff;
  box-shadow: 0 12px 28px rgb(7 83 61 / 20%);
}

.practice-standard__badge-number {
  color: var(--practice-standard-warm);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 2.4rem;
  font-weight: 900;
  line-height: 1;
}

.practice-standard__badge strong {
  font-size: 1.1rem;
}

.practice-standard__badge small {
  color: rgb(255 255 255 / 76%);
  line-height: 1.45;
}

.practice-standard__roadmap {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.practice-standard__step {
  position: relative;
  display: grid;
  min-height: 112px;
  align-content: start;
  gap: 5px;
  padding: 17px;
  border: 1px solid var(--practice-standard-line);
  border-radius: 16px;
  background: rgb(255 253 247 / 78%);
  color: var(--practice-standard-muted);
}

.practice-standard__step::after {
  position: absolute;
  top: 50%;
  right: -13px;
  width: 12px;
  border-top: 1px dashed var(--practice-standard-line);
  content: "";
}

.practice-standard__step:last-child::after {
  display: none;
}

.practice-standard__step[data-state="done"] {
  border-color: #9bc8b5;
  background: var(--practice-standard-accent-soft);
  color: var(--practice-standard-accent-strong);
}

.practice-standard__step[data-state="current"] {
  border-color: var(--practice-standard-accent);
  background: var(--practice-standard-surface-strong);
  box-shadow: inset 0 0 0 2px rgb(11 118 85 / 14%), 0 10px 24px rgb(23 32 29 / 7%);
  color: var(--practice-standard-text);
}

.practice-standard__step[data-state="current"]::before {
  position: absolute;
  top: 10px;
  right: 12px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--practice-standard-warm);
  content: "";
}

.practice-standard__step-number {
  color: var(--practice-standard-accent-strong);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.78rem;
  font-weight: 900;
}

.practice-standard__step strong {
  color: var(--practice-standard-text);
  font-size: 1rem;
}

.practice-standard__step small {
  line-height: 1.45;
}

.practice-standard__tasks {
  margin-top: 18px;
  padding: clamp(20px, 4vw, 30px);
  border: 1px solid var(--practice-standard-line);
  border-radius: 22px;
  background: rgb(255 253 247 / 88%);
}

.practice-standard__tasks-header h2 {
  margin: 0;
  color: var(--practice-standard-text);
  font-size: clamp(1.35rem, 2.4vw, 1.8rem);
  letter-spacing: -0.035em;
}

.practice-standard__task-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.practice-standard__task-card {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--practice-standard-line);
  border-radius: 16px;
  background: var(--practice-standard-surface-strong);
}

.practice-standard__task-card[data-state="done"] {
  border-color: #9bc8b5;
  background: var(--practice-standard-accent-soft);
}

.practice-standard__task-card[data-state="current"] {
  border-color: var(--practice-standard-accent);
  box-shadow: inset 0 0 0 2px rgb(11 118 85 / 13%);
}

.practice-standard__task-card[data-state="upcoming"] {
  color: var(--practice-standard-muted);
}

.practice-standard__task-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.practice-standard__task-card-header span,
.practice-standard__task-card-header strong {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
}

.practice-standard__task-card-header span {
  color: var(--practice-standard-accent-strong);
  font-weight: 900;
}

.practice-standard__task-card-header strong {
  padding: 5px 8px;
  border-radius: 999px;
  background: var(--practice-standard-bg);
}

.practice-standard__task-card h3 {
  margin: 16px 0 0;
  color: var(--practice-standard-text);
  font-size: 1.05rem;
  line-height: 1.45;
}

.practice-standard__task-card p {
  margin: 10px 0 0;
  line-height: 1.6;
}

.practice-standard__task-card code,
.practice-standard__observation code {
  overflow-wrap: anywhere;
  color: inherit;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.86em;
}

.practice-standard__workspace {
  margin-top: 28px;
  padding: clamp(20px, 4vw, 34px);
  border: 1px solid var(--practice-standard-line);
  border-radius: 26px;
  background: rgb(255 253 247 / 88%);
  box-shadow: var(--practice-standard-shadow);
}

.practice-standard__workspace-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 22px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--practice-standard-line);
}

.practice-standard__workspace-title,
.practice-standard__aside h3,
.practice-standard__continue-title {
  margin: 0;
  color: var(--practice-standard-text);
  letter-spacing: -0.04em;
  line-height: 1.2;
}

.practice-standard__workspace-title {
  font-size: clamp(1.65rem, 3vw, 2.45rem);
}

.practice-standard__workspace-focus {
  max-width: 33rem;
  margin: 0;
  color: var(--practice-standard-muted);
  line-height: 1.7;
  text-align: right;
}

.practice-standard__layout {
  display: grid;
  grid-template-columns: minmax(220px, 0.72fr) minmax(0, 1.55fr);
  gap: 18px;
  margin-top: 22px;
}

.practice-standard__aside,
.practice-standard__content {
  min-width: 0;
  border: 1px solid var(--practice-standard-line);
  border-radius: 19px;
}

.practice-standard__aside {
  align-self: start;
  padding: 22px;
  background: var(--practice-standard-accent-strong);
  color: #ffffff;
}

.practice-standard__aside .practice-standard__label {
  color: var(--practice-standard-warm);
}

.practice-standard__aside h3 {
  color: #ffffff;
  font-size: 1.55rem;
}

.practice-standard__aside p {
  margin: 14px 0 0;
  color: rgb(255 255 255 / 78%);
  line-height: 1.75;
}

.practice-standard__observation {
  display: grid;
  gap: 0;
  margin: 20px 0 0;
}

.practice-standard__observation div {
  display: grid;
  gap: 5px;
  padding: 14px 0;
  border-top: 1px solid rgb(255 255 255 / 18%);
}

.practice-standard__observation dt {
  color: var(--practice-standard-warm);
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.practice-standard__observation dd {
  margin: 0;
  color: #ffffff;
  font-size: 0.92rem;
  line-height: 1.65;
}

.practice-standard__aside-note {
  display: grid;
  gap: 4px;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid rgb(255 255 255 / 20%);
}

.practice-standard__aside-note strong {
  color: var(--practice-standard-warm);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.practice-standard__aside-note span {
  color: #ffffff;
  font-size: 0.92rem;
}

.practice-standard__content {
  padding: clamp(20px, 4vw, 32px);
  overflow: hidden;
  background: var(--practice-standard-surface-strong);
}

.practice-standard__content > main {
  width: auto;
  max-width: none;
  min-height: 0;
  margin: 0;
}

.practice-standard__continue {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 18px;
  padding: 22px 24px;
  border: 1px solid var(--practice-standard-line);
  border-radius: 19px;
  background: var(--practice-standard-surface);
}

.practice-standard__continue-title {
  font-size: clamp(1.2rem, 2vw, 1.55rem);
}

.practice-standard__continue-description {
  max-width: 48rem;
  margin: 8px 0 0;
  color: var(--practice-standard-muted);
  line-height: 1.65;
}

.practice-standard__continue-link {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 12px;
  min-height: 48px;
  padding: 12px 17px;
  border: 1px solid var(--practice-standard-accent);
  border-radius: 999px;
  background: var(--practice-standard-accent);
  color: #ffffff;
  font-weight: 800;
  text-decoration: none;
  transition: background 160ms ease, transform 160ms ease;
}

.practice-standard__continue-link:hover {
  background: var(--practice-standard-accent-strong);
  transform: translateY(-1px);
}

.practice-standard__continue-link:focus-visible,
.practice-standard__content :where(a, button, input, select):focus-visible {
  outline: 3px solid var(--practice-standard-warm);
  outline-offset: 3px;
}

@media (max-width: 760px) {
  .practice-standard {
    width: min(100% - 20px, 620px);
    padding-top: 10px;
  }

  .practice-standard__hero {
    grid-template-columns: 1fr;
    gap: 22px;
    padding: 28px 22px 24px;
    border-radius: 22px;
  }

  .practice-standard__title {
    max-width: none;
    font-size: clamp(2rem, 12vw, 3.5rem);
  }

  .practice-standard__badge {
    grid-template-columns: auto 1fr;
    align-items: center;
    column-gap: 12px;
    min-width: 0;
    padding: 14px 16px;
  }

  .practice-standard__badge small {
    grid-column: 2;
  }

  .practice-standard__badge-number {
    grid-row: span 2;
  }

  .practice-standard__roadmap {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .practice-standard__task-grid {
    grid-template-columns: 1fr;
  }

  .practice-standard__step::after {
    display: none;
  }

  .practice-standard__workspace {
    margin-top: 18px;
    padding: 16px;
    border-radius: 21px;
  }

  .practice-standard__workspace-header,
  .practice-standard__continue {
    align-items: start;
    flex-direction: column;
  }

  .practice-standard__workspace-header {
    gap: 12px;
    padding-bottom: 18px;
  }

  .practice-standard__workspace-focus {
    text-align: left;
  }

  .practice-standard__layout {
    grid-template-columns: 1fr;
    gap: 14px;
    margin-top: 16px;
  }

  .practice-standard__continue {
    padding: 18px;
  }

  .practice-standard__continue-link {
    width: 100%;
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .practice-standard__continue-link {
    transition: none;
  }
}