:root {
  color-scheme: light;
  --ink: #17212b;
  --muted: #66717d;
  --navy: #1f4e79;
  --navy-dark: #153957;
  --amber: #c98c2c;
  --paper: #ffffff;
  --canvas: #eef2f5;
  --line: #d7dee5;
  --soft-blue: #eaf2f8;
  --soft-amber: #fff6e5;
  --danger: #a33a34;
  font-family: "Noto Sans CJK TC", "Microsoft JhengHei", system-ui, sans-serif;
  font-size: 16px;
}

* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: var(--canvas); line-height: 1.6; }
button, input, textarea { font: inherit; }
button { cursor: pointer; }
[hidden] { display: none !important; }

.login-shell { min-height: 100vh; display: grid; place-items: center; padding: 24px; background: radial-gradient(circle at 20% 10%, #f9fbfd, var(--canvas) 55%); }
.login-card { width: min(100%, 480px); padding: 42px; background: var(--paper); border: 1px solid var(--line); box-shadow: 0 18px 50px rgba(24, 43, 61, .12); }
.eyebrow { color: var(--navy); font-size: .72rem; letter-spacing: .14em; font-weight: 800; }
h1, h2, h3, p { margin-top: 0; }
.login-card h1 { margin: 10px 0 14px; font-size: 2rem; letter-spacing: .03em; }
.login-copy { color: var(--muted); margin-bottom: 30px; }
label { display: grid; gap: 8px; font-weight: 700; font-size: .92rem; }
input, textarea { width: 100%; border: 1px solid var(--line); background: #fff; color: var(--ink); border-radius: 4px; padding: 11px 13px; outline: none; }
input:focus, textarea:focus { border-color: var(--navy); box-shadow: 0 0 0 3px rgba(31, 78, 121, .14); }
textarea { resize: vertical; min-height: 130px; line-height: 1.7; }
.login-card form { display: grid; gap: 13px; }
.primary-button, .secondary-button, .download-button, .ghost-button, .text-button { border-radius: 4px; padding: 10px 16px; border: 1px solid transparent; font-weight: 800; }
.primary-button { background: var(--navy); color: white; }
.primary-button:hover { background: var(--navy-dark); }
.secondary-button { color: var(--navy); background: var(--soft-blue); border-color: #cbdce9; }
.ghost-button { background: transparent; color: var(--navy); border-color: var(--line); }
.text-button { padding: 4px 0; background: transparent; color: var(--muted); font-weight: 600; }
.text-button:hover { color: var(--navy); }
.error-text { color: var(--danger); margin: 0; font-size: .9rem; }

.topbar { padding: 22px clamp(20px, 5vw, 72px); background: var(--paper); border-bottom: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.topbar h1 { margin: 5px 0 0; font-size: 1.45rem; letter-spacing: .05em; }
.topbar-actions { display: flex; align-items: center; gap: 12px; }
.status-pill, .completion-label { display: inline-flex; align-items: center; padding: 4px 10px; border-radius: 99px; background: var(--soft-amber); color: #805e20; font-size: .78rem; font-weight: 800; }
.status-pill.ready { background: #e7f4ec; color: #22623c; }

.app-layout { max-width: 1440px; margin: 0 auto; padding: 34px clamp(20px, 5vw, 72px) 70px; display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(320px, .8fr); gap: 28px; align-items: start; }
.workspace, .preview-panel { min-width: 0; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 18px; margin-bottom: 20px; }
.section-heading.compact { align-items: center; }
.section-heading h2 { margin: 3px 0 0; font-size: 1.35rem; }
.period-switch { display: flex; border: 1px solid var(--line); background: var(--paper); padding: 3px; }
.period-button { border: 0; background: transparent; color: var(--muted); padding: 7px 16px; font-weight: 800; }
.period-button.is-active { background: var(--navy); color: white; }

.progress-list { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 6px; margin-bottom: 20px; }
.progress-item { min-height: 62px; padding: 9px 10px; border: 1px solid var(--line); background: rgba(255,255,255,.65); color: var(--muted); }
.progress-item .progress-number { display: block; font-size: .72rem; font-weight: 800; }
.progress-item .progress-title { display: block; font-size: .83rem; line-height: 1.3; margin-top: 3px; }
.progress-item.active { border-color: var(--navy); background: var(--soft-blue); color: var(--navy); }
.progress-item.done { border-color: #b8d7c4; background: #f2faf5; color: #28643f; }

.basic-details, .question-card, .preview-panel { background: var(--paper); border: 1px solid var(--line); }
.basic-details { margin-bottom: 20px; }
.basic-details summary { padding: 13px 18px; font-weight: 800; color: var(--navy); cursor: pointer; border-bottom: 1px solid var(--line); }
.basic-grid { padding: 18px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.question-card { padding: 28px; }
.card-kicker { color: var(--amber); font-size: .8rem; font-weight: 900; letter-spacing: .08em; }
.question-card h3 { margin: 4px 0 12px; font-size: 1.5rem; }
.step-prompt { margin-bottom: 22px; color: #34414d; max-width: 80ch; }
.question-card form { display: grid; gap: 10px; }
.field-hint { margin: -2px 0 7px; color: var(--muted); font-size: .85rem; }
.form-actions { display: flex; gap: 10px; margin-top: 4px; }
.workspace-footer { display: flex; justify-content: space-between; gap: 15px; color: var(--muted); font-size: .85rem; padding: 14px 2px; }

.preview-panel { padding: 24px; position: sticky; top: 20px; }
.summary-list { display: grid; gap: 13px; max-height: 52vh; overflow: auto; padding-right: 4px; }
.summary-entry { padding-bottom: 13px; border-bottom: 1px solid var(--line); }
.summary-entry h3 { margin: 0 0 5px; font-size: .98rem; color: var(--navy); }
.summary-entry p { margin: 0; white-space: pre-wrap; color: #34414d; font-size: .92rem; }
.muted, .preview-note { color: var(--muted); }
.warning-block { margin: 22px 0; padding: 14px 16px; background: var(--soft-amber); border-left: 3px solid var(--amber); }
.warning-block h3 { margin-bottom: 6px; font-size: .95rem; }
.warning-block ul { margin: 0; padding-left: 20px; color: #6c5527; font-size: .88rem; }
.download-button { width: 100%; background: var(--amber); color: #1f1b13; padding: 13px 16px; }
.download-button:disabled { opacity: .45; cursor: not-allowed; }
.preview-note { margin: 11px 0 0; font-size: .78rem; }

@media (max-width: 980px) {
  .app-layout { grid-template-columns: 1fr; }
  .preview-panel { position: static; }
}
@media (max-width: 680px) {
  .topbar { align-items: flex-start; flex-direction: column; }
  .topbar-actions { width: 100%; justify-content: space-between; }
  .progress-list { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .basic-grid { grid-template-columns: 1fr; }
  .question-card { padding: 21px; }
  .section-heading { align-items: flex-start; flex-direction: column; }
  .period-switch { align-self: stretch; }
  .period-button { flex: 1; }
}

.step-guide { margin: 0 0 22px; padding: 16px 18px; border: 1px solid #cbdce9; background: #f7fbfe; }
.step-guide h4 { margin: 0 0 6px; color: var(--navy); font-size: .92rem; }
.step-guide ol, .step-guide ul { margin: 0; padding-left: 22px; color: #34414d; font-size: .9rem; }
.step-guide li + li { margin-top: 3px; }
.guide-section + .guide-section { margin-top: 13px; }
.expansion-note { margin: 14px 0 0; padding-top: 11px; border-top: 1px dashed #cbdce9; color: var(--muted); font-size: .84rem; }
.form-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 4px; }
.form-actions .back-step { order: -1; }
.ghost-button:disabled, .secondary-button:disabled, .primary-button:disabled { opacity: .48; cursor: not-allowed; }