:root {
  --bg: #f5f7f8;
  --panel: #ffffff;
  --ink: #162029;
  --muted: #68727d;
  --line: #d9e0e6;
  --primary: #245b4f;
  --primary-dark: #174139;
  --accent: #b85c38;
  --soft: #eef4f1;
  --warning: #f4eadb;
  --danger: #b43636;
  --shadow: 0 14px 36px rgba(22, 32, 41, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Microsoft JhengHei", "Noto Sans TC", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  display: grid;
  grid-template-columns: 300px 1fr;
  min-height: 100vh;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 28px;
  padding: 28px;
  color: #fff;
  background: #183831;
}

.brand {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 14px;
  align-items: center;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  font-weight: 800;
}

.brand h1 {
  margin: 0;
  font-size: 20px;
  line-height: 1.25;
}

.brand p,
.page-head p,
.empty-state p {
  margin: 6px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.brand p {
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
}

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

.nav-item {
  width: 100%;
  min-height: 46px;
  padding: 0 14px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  color: rgba(255, 255, 255, 0.82);
  text-align: left;
  background: transparent;
}

.nav-item.active,
.nav-item:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
}

.sidebar-summary {
  margin-top: auto;
  padding: 18px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
}

.sidebar-summary span {
  display: block;
  color: rgba(255, 255, 255, 0.72);
}

.sidebar-summary strong {
  display: block;
  margin-top: 8px;
  font-size: 34px;
}

.sidebar-summary small {
  display: inline-flex;
  align-items: center;
  margin-top: 10px;
  padding: 5px 9px;
  border-radius: 999px;
  color: #fff;
  background: rgba(255, 255, 255, 0.16);
  font-weight: 700;
}

.sidebar-summary small[data-mode="cloud"] {
  background: var(--accent);
}

.main {
  width: min(1100px, 100%);
  padding: 34px;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.page-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 24px;
}

.page-head h2 {
  margin: 0;
  font-size: 30px;
}

.task-form,
.output-panel,
.message-box,
.idea-card,
.empty-state {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.task-form {
  display: grid;
  gap: 18px;
  padding: 24px;
}

label {
  display: grid;
  gap: 8px;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: #fff;
}

input,
select {
  min-height: 44px;
  padding: 0 12px;
}

textarea {
  min-height: 120px;
  padding: 12px;
  line-height: 1.6;
  resize: vertical;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.actions {
  display: flex;
  justify-content: flex-end;
}

.primary-btn,
.secondary-btn {
  min-height: 42px;
  padding: 0 16px;
  border-radius: 8px;
  border: 1px solid transparent;
  font-weight: 700;
}

.primary-btn {
  color: #fff;
  background: var(--primary);
}

.primary-btn:hover {
  background: var(--primary-dark);
}

.secondary-btn {
  color: var(--primary);
  border-color: var(--line);
  background: #fff;
}

.secondary-btn.danger {
  color: var(--danger);
}

.idea-list {
  display: grid;
  gap: 14px;
}

.idea-card {
  padding: 18px;
}

.idea-card.active {
  border-color: var(--primary);
}

.idea-card-head {
  display: flex;
  justify-content: space-between;
  gap: 14px;
}

.idea-card h3 {
  margin: 0;
  font-size: 18px;
}

.idea-card p {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.idea-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.pill {
  padding: 5px 9px;
  border-radius: 999px;
  color: var(--primary-dark);
  background: var(--soft);
  font-size: 13px;
  font-weight: 700;
}

.idea-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.small-btn {
  min-height: 34px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: #fff;
}

.small-btn.danger {
  color: var(--danger);
}

.output-panel,
.message-box,
.empty-state {
  padding: 24px;
}

.output-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.output-section {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.output-section.full {
  grid-column: 1 / -1;
}

.output-section h3 {
  margin: 0 0 10px;
  font-size: 17px;
}

.output-section p,
.output-section li,
.message-box p,
.message-box li {
  color: #26313b;
  line-height: 1.65;
}

.output-section p {
  margin: 0;
}

.message-box {
  white-space: pre-wrap;
  line-height: 1.7;
}

.empty-state {
  text-align: center;
}

.empty-state h3 {
  margin: 0;
}

.toast {
  position: fixed;
  right: 24px;
  bottom: 24px;
  padding: 12px 16px;
  border-radius: 8px;
  color: #fff;
  background: var(--primary-dark);
  box-shadow: var(--shadow);
}

@media (max-width: 860px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    padding: 18px;
  }

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

  .sidebar-summary {
    display: none;
  }

  .main {
    padding: 22px;
  }

  .page-head,
  .idea-card-head {
    flex-direction: column;
  }

  .form-grid,
  .output-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .brand {
    grid-template-columns: 1fr;
  }

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

  .main {
    padding: 16px;
  }

  .page-head h2 {
    font-size: 24px;
  }
}