:root {
  color-scheme: light;
  --bg: #f4f2ea;
  --paper: #fffdf7;
  --paper-strong: #ffffff;
  --ink: #20201d;
  --muted: #6f6b61;
  --line: rgba(32, 32, 29, .13);
  --green: #315f52;
  --green-2: #dfeae2;
  --blue: #246b89;
  --brick: #a34f3d;
  --gold: #b78d46;
  --shadow: 0 22px 52px rgba(33, 31, 26, .12);
  --radius: 8px;
  font-family: "Noto Sans TC", "Microsoft JhengHei", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

body[data-theme="night"] {
  color-scheme: dark;
  --bg: #171a18;
  --paper: #20241f;
  --paper-strong: #282d27;
  --ink: #f6f1e6;
  --muted: #b8b2a5;
  --line: rgba(246, 241, 230, .14);
  --green: #9ac8b6;
  --green-2: rgba(154, 200, 182, .16);
  --blue: #8bbfd0;
  --brick: #df927e;
  --gold: #dbbd78;
  --shadow: 0 22px 58px rgba(0, 0, 0, .28);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(180deg, rgba(255,255,255,.55), transparent 240px),
    var(--bg);
  color: var(--ink);
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input {
  font: inherit;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px max(16px, env(safe-area-inset-left)) 10px max(16px, env(safe-area-inset-right));
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  color: #fff;
  background: var(--green);
  border-radius: 50%;
  font-size: 15px;
}

.icon-button {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 50%;
  box-shadow: 0 8px 18px rgba(31, 29, 25, .08);
}

.hero {
  position: relative;
  min-height: min(680px, 88svh);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  isolation: isolate;
}

.hero-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 58% center;
  z-index: -2;
}

.hero-shade {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(18, 24, 22, .1) 0%, rgba(18, 24, 22, .18) 38%, rgba(18, 24, 22, .78) 100%),
    linear-gradient(90deg, rgba(18, 24, 22, .62), transparent 76%);
}

.hero-copy {
  width: min(100%, 760px);
  padding: 84px 20px 28px;
  color: #fff;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--gold);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 100%;
  margin: 0;
  font-size: clamp(40px, 10.8vw, 86px);
  line-height: .95;
  letter-spacing: 0;
}

.hero h1 span {
  display: block;
}

.hero p:not(.eyebrow) {
  max-width: 30rem;
  margin: 18px 0 0;
  color: rgba(255, 255, 255, .88);
  font-size: 17px;
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.primary-action,
.secondary-action {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border-radius: 999px;
  font-weight: 800;
}

.primary-action {
  color: #173029;
  background: #fff;
}

.secondary-action {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, .55);
}

.quick-nav {
  position: sticky;
  top: 61px;
  z-index: 18;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  padding: 10px 14px;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.quick-nav::-webkit-scrollbar {
  display: none;
}

.quick-nav a {
  display: grid;
  flex: 0 0 82px;
  min-height: 38px;
  place-items: center;
  color: var(--muted);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 800;
}

main > section:not(.hero) {
  width: min(1120px, calc(100% - 28px));
  margin: 0 auto;
}

.snapshot {
  display: grid;
  gap: 10px;
  padding: 22px 0 12px;
}

.snapshot article,
.calc-panel,
.result-panel,
.lesson-item,
.cards article,
.market-card,
.source-list a {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 12px 30px rgba(31, 29, 25, .06);
}

.snapshot article {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 3px 12px;
  padding: 16px;
}

.snapshot span {
  grid-row: span 2;
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  color: var(--green);
  background: var(--green-2);
  border-radius: 50%;
  font-size: 14px;
  font-weight: 900;
}

.snapshot strong {
  font-size: 18px;
}

.snapshot p,
.section-head p,
.cards p,
.market-card p,
.source-list small,
.lesson-body p {
  color: var(--muted);
  line-height: 1.7;
}

.snapshot p {
  margin: 0;
  font-size: 14px;
}

.snapshot strong,
.snapshot p,
.lesson-title,
.check-card span {
  min-width: 0;
}

.section-head {
  padding: 44px 0 18px;
}

.section-head.compact {
  padding-bottom: 10px;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(30px, 8vw, 54px);
  line-height: 1.05;
  letter-spacing: 0;
}

.section-head p:not(.eyebrow) {
  margin: 12px 0 0;
  max-width: 42rem;
}

.calc-grid {
  display: grid;
  gap: 12px;
}

.calc-panel {
  display: grid;
  gap: 12px;
  padding: 16px;
}

.calc-panel label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}

.input-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--paper-strong);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
}

.input-wrap input {
  width: 100%;
  min-width: 0;
  color: var(--ink);
  background: transparent;
  border: 0;
  outline: 0;
  font-size: 22px;
  font-weight: 900;
}

.input-wrap small {
  color: var(--muted);
  white-space: nowrap;
}

.result-panel {
  padding: 18px;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--green) 18%, transparent), transparent 52%),
    var(--paper);
}

.result-label {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.result-panel > strong {
  display: block;
  margin-top: 6px;
  color: var(--green);
  font-size: clamp(42px, 14vw, 72px);
  line-height: 1;
  letter-spacing: 0;
}

.result-panel > p {
  margin: 6px 0 18px;
  color: var(--muted);
}

.result-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.result-row span {
  color: var(--muted);
}

.result-row b {
  font-size: 20px;
}

.result-note {
  margin-top: 10px;
  padding: 12px;
  color: var(--brick);
  background: color-mix(in srgb, var(--brick) 10%, transparent);
  border-radius: 8px;
  font-size: 14px;
  line-height: 1.6;
}

.lesson-list {
  display: grid;
  gap: 10px;
}

.lesson-item {
  overflow: clip;
}

.lesson-toggle {
  display: grid;
  width: 100%;
  grid-template-columns: 46px 1fr 22px;
  gap: 12px;
  align-items: center;
  min-height: 82px;
  padding: 14px 16px;
  color: var(--ink);
  background: transparent;
  border: 0;
  text-align: left;
}

.lesson-number {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: #fff;
  background: var(--green);
  border-radius: 50%;
  font-weight: 900;
}

.lesson-title {
  display: grid;
  gap: 4px;
}

.lesson-title strong {
  font-size: 17px;
}

.lesson-title small {
  color: var(--muted);
  font-size: 13px;
}

.lesson-icon {
  color: var(--muted);
  font-size: 22px;
  transition: transform .2s ease;
}

.lesson-item.is-open .lesson-icon {
  transform: rotate(45deg);
}

.lesson-body {
  display: none;
  padding: 0 16px 16px 74px;
}

.lesson-item.is-open .lesson-body {
  display: block;
}

.lesson-body p {
  margin: 0 0 12px;
}

.lesson-points {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.lesson-points li {
  padding: 10px 12px;
  background: var(--paper-strong);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 14px;
  line-height: 1.55;
}

.cards {
  display: grid;
  gap: 10px;
}

.cards article {
  padding: 18px;
}

.cards span {
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
}

.cards h3 {
  margin: 8px 0;
  font-size: 22px;
}

.cards p {
  margin: 0;
}

.checklist-grid {
  display: grid;
  gap: 10px;
}

.check-card {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.check-card input {
  width: 22px;
  height: 22px;
  margin-top: 2px;
  accent-color: var(--green);
}

.check-card strong {
  display: block;
}

.check-card small {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  line-height: 1.55;
}

.check-progress {
  position: sticky;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 12px;
  padding: 12px max(14px, env(safe-area-inset-left)) calc(12px + env(safe-area-inset-bottom)) max(14px, env(safe-area-inset-right));
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  border: 1px solid var(--line);
  border-radius: 8px 8px 0 0;
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.check-progress span {
  font-weight: 900;
}

.text-button {
  color: var(--green);
  background: transparent;
  border: 0;
  font-weight: 900;
}

.market-board {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-bottom: 10px;
}

.market-tab {
  min-height: 42px;
  color: var(--muted);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-weight: 900;
}

.market-tab.is-active {
  color: #fff;
  background: var(--green);
  border-color: transparent;
}

.market-card {
  min-height: 180px;
  padding: 18px;
}

.market-card h3 {
  margin: 0 0 8px;
  font-size: 24px;
}

.market-card p {
  margin: 0 0 12px;
}

.market-card ul {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.market-card li {
  padding-left: 16px;
  border-left: 3px solid var(--gold);
  color: var(--muted);
  line-height: 1.55;
}

.source-list {
  display: grid;
  gap: 10px;
  padding-bottom: 28px;
}

.material-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 12px;
}

.material-stats article {
  min-width: 0;
  padding: 14px 12px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.material-stats span,
.material-stats small {
  display: block;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}

.material-stats strong {
  display: block;
  margin: 2px 0;
  color: var(--green);
  font-size: clamp(26px, 8vw, 44px);
  line-height: 1;
}

.material-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 10px;
  scrollbar-width: none;
}

.material-tabs::-webkit-scrollbar {
  display: none;
}

.material-tab {
  flex: 0 0 auto;
  min-height: 40px;
  padding: 0 14px;
  color: var(--muted);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-weight: 900;
}

.material-tab.is-active {
  color: #fff;
  background: var(--green);
  border-color: transparent;
}

.material-card {
  padding: 18px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 12px 30px rgba(31, 29, 25, .06);
}

.material-card-head span {
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
}

.material-card-head h3 {
  margin: 6px 0 8px;
  font-size: 24px;
}

.material-card-head p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.update-note {
  display: grid;
  gap: 4px;
  margin: 14px 0;
  padding: 12px;
  color: var(--brick);
  background: color-mix(in srgb, var(--brick) 10%, transparent);
  border-radius: 8px;
  line-height: 1.55;
}

.video-links {
  display: grid;
  gap: 8px;
}

.video-links a {
  display: grid;
  gap: 4px;
  padding: 12px;
  background: var(--paper-strong);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.video-links span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.video-links strong {
  line-height: 1.45;
}

.planner-grid {
  display: grid;
  gap: 12px;
}

.planner-workbench,
.planner-panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 12px 30px rgba(31, 29, 25, .06);
}

.planner-workbench {
  padding: 12px;
}

.upload-box {
  display: grid;
  gap: 5px;
  padding: 14px;
  color: var(--ink);
  background: var(--paper-strong);
  border: 1px dashed color-mix(in srgb, var(--green) 45%, var(--line));
  border-radius: 8px;
  cursor: pointer;
}

.upload-box input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.upload-box span {
  color: var(--green);
  font-weight: 900;
}

.upload-box small {
  color: var(--muted);
  line-height: 1.5;
}

.plan-canvas {
  position: relative;
  min-height: 300px;
  margin-top: 12px;
  overflow: hidden;
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--line) 55%, transparent) 1px, transparent 1px),
    linear-gradient(color-mix(in srgb, var(--line) 55%, transparent) 1px, transparent 1px),
    var(--paper-strong);
  background-size: 24px 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.plan-canvas.has-image {
  min-height: 0;
  background: #fff;
}

.plan-empty {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  gap: 8px;
  padding: 24px;
  color: var(--muted);
  text-align: center;
}

.plan-empty strong {
  color: var(--ink);
  font-size: 18px;
}

#planPreview {
  display: block;
  width: 100%;
  max-height: 70vh;
  object-fit: contain;
  background: #fff;
}

.marker-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.plan-marker {
  position: absolute;
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: #fff;
  background: var(--green);
  border: 2px solid #fff;
  border-radius: 50%;
  box-shadow: 0 8px 20px rgba(0, 0, 0, .2);
  font-size: 12px;
  font-weight: 900;
  transform: translate(-50%, -50%);
  pointer-events: auto;
}

.planner-panel {
  padding: 14px;
}

.planner-controls {
  display: grid;
  gap: 10px;
}

.planner-controls label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 900;
}

.planner-controls select {
  min-height: 44px;
  width: 100%;
  color: var(--ink);
  background: var(--paper-strong);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 12px;
}

.constraint-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0;
}

.constraint-group label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 36px;
  padding: 0 10px;
  color: var(--muted);
  background: var(--paper-strong);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 900;
}

.constraint-group input {
  accent-color: var(--green);
}

.planner-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 6px 0 12px;
}

.primary-mini {
  min-height: 38px;
  padding: 0 14px;
  color: #fff;
  background: var(--green);
  border: 0;
  border-radius: 999px;
  font-weight: 900;
}

.marker-list {
  display: grid;
  gap: 8px;
  margin-bottom: 12px;
}

.marker-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  background: var(--paper-strong);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.marker-item span {
  color: var(--muted);
  font-size: 13px;
}

.marker-item button {
  color: var(--brick);
  background: transparent;
  border: 0;
  font-weight: 900;
}

.advice-card {
  display: grid;
  gap: 12px;
  padding: 14px;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--green) 12%, transparent), transparent 58%),
    var(--paper-strong);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.advice-card h3 {
  margin: 0;
  font-size: 22px;
}

.advice-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.advice-card ul {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.advice-card li {
  padding-left: 14px;
  border-left: 3px solid var(--gold);
  color: var(--muted);
  line-height: 1.55;
}

.source-list a {
  display: grid;
  gap: 5px;
  padding: 16px;
}

.source-list span {
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
}

.source-list strong {
  font-size: 18px;
}

.source-list small {
  font-size: 14px;
}

.footer {
  width: min(1120px, calc(100% - 28px));
  margin: 0 auto;
  padding: 20px 0 34px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
}

.footer a {
  display: inline-flex;
  margin-top: 8px;
  color: var(--green);
  font-weight: 900;
}

@media (min-width: 760px) {
  .hero-copy {
    padding-left: 48px;
    padding-bottom: 58px;
  }

  .snapshot,
  .calc-grid,
  .cards,
  .checklist-grid,
  .source-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .calc-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(320px, .92fr);
  }

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

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

  .planner-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(320px, .85fr);
  }

  .planner-controls {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1040px) {
  .quick-nav {
    top: 64px;
    width: min(620px, calc(100% - 40px));
    margin: 0 auto;
    border: 1px solid var(--line);
    border-radius: 999px;
  }
}