html {
  background: var(--color-page);
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-ui);
  background: var(--color-page);
  color: var(--color-text);
}

button,
summary {
  min-height: 44px;
}

input[type="text"],
input[type="password"],
input[type="search"],
input[type="date"],
input[type="datetime-local"],
select {
  min-height: 44px;
}

summary {
  display: flex;
  align-items: center;
  cursor: pointer;
}

#shell {
  width: 100%;
  max-width: 1180px;
  min-height: 100vh;
  margin: 0 auto;
  overflow-x: clip;
  background: transparent;
}

header {
  position: sticky;
  top: 0;
  z-index: 30;
  min-height: 64px;
  padding: 12px 24px;
  color: var(--color-text);
  background: rgba(255, 255, 255, .94);
  border-bottom: 1px solid var(--color-line);
  border-radius: 0;
  box-shadow: 0 6px 24px rgba(63, 92, 122, .06);
  backdrop-filter: blur(14px);
}

header .mark {
  fill: var(--color-primary);
}

header .mark .bars {
  fill: var(--color-surface);
}

header .sub {
  color: var(--color-text-secondary-aa);
  opacity: 1;
}

header .brand-launch:hover {
  background: var(--color-primary-50);
}

header .brand-launch {
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}

header .brand-launch:focus-visible,
#version-badge:focus-visible,
#pf-badge:focus-visible,
#mode-badge:focus-visible {
  outline: 2px solid var(--color-text);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px var(--color-surface);
}

#version-badge,
#pf-badge,
#mode-badge {
  min-height: 44px;
  color: var(--color-text);
  background: var(--color-primary-50);
  border-color: var(--color-primary-300);
}

#mode-badge.alarm {
  color: var(--color-text);
  background: var(--color-accent-100);
  border-color: var(--color-accent);
}

nav {
  position: sticky;
  top: 64px;
  left: auto;
  z-index: 29;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  width: 100%;
  max-width: none;
  padding: 0 24px;
  transform: none;
  background: rgba(255, 255, 255, .94);
  border: 0;
  border-bottom: 1px solid var(--color-line);
  backdrop-filter: blur(14px);
}

nav .tab {
  position: relative;
  min-width: 0;
  min-height: 48px;
  padding: 12px 4px 10px;
  color: var(--color-text-secondary-aa);
  font-size: .88rem;
  font-weight: 550;
}

nav .tab svg {
  display: none;
}

nav .tab::after {
  content: "";
  position: absolute;
  right: 28%;
  bottom: 0;
  left: 28%;
  height: 3px;
  border-radius: 999px 999px 0 0;
  background: transparent;
}

nav .tab.active {
  color: var(--color-text);
  font-weight: 700;
}

nav .tab.active::after {
  background: var(--color-primary);
}

main {
  padding: 32px 32px 64px;
}

.page {
  width: 100%;
  max-width: 920px;
  margin: 0 auto;
}

#page-home {
  max-width: 760px;
}

#page-relations {
  max-width: 1080px;
}

.segment-head button.datepill {
  min-height: 44px;
}

.page.active {
  animation: fade .2s ease;
}

.card,
.home-focus {
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  box-shadow: var(--shadow-card);
}

.home-focus {
  background: linear-gradient(145deg, var(--color-surface) 18%, var(--color-primary-50) 100%);
  border-color: var(--color-primary-200);
}

.home-input-block.required {
  background: var(--color-accent-50);
  border-color: var(--color-accent);
}

.home-input-block.goal {
  background: var(--color-secondary-50);
  border-color: var(--color-secondary);
}

.home-input-block:focus-within,
.home-input-block.required:focus-within,
.home-input-block.goal:focus-within {
  border-color: var(--color-text);
  box-shadow: 0 0 0 2px var(--color-surface), 0 0 0 4px var(--color-text);
}

.btn {
  min-height: 44px;
  color: var(--color-text);
  background: var(--color-primary);
}

.btn:hover:not(:disabled) {
  filter: brightness(.97);
}

.btn:disabled {
  color: var(--color-text-secondary-aa);
  background: var(--color-surface-muted);
  border: 1px solid var(--color-line);
  box-shadow: none;
  opacity: 1;
  cursor: not-allowed;
}

.btn.ghost {
  color: var(--color-text);
  background: var(--color-secondary-100);
}

.btn.line {
  color: var(--color-text);
  background: var(--color-surface);
  border-color: var(--color-control-line);
}

.home-compose .btn:disabled {
  color: var(--color-text-secondary-aa);
  background: var(--color-surface-muted);
}

textarea,
input[type=text],
input[type=password],
input[type=datetime-local],
select {
  color: var(--color-text);
  background: var(--color-surface);
  border-color: var(--color-control-line);
}

button:focus-visible,
summary:focus-visible,
a:focus-visible,
select:focus-visible,
textarea:focus-visible,
input:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--color-text);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px var(--color-surface);
}

/* 路由标题只承接页面切换后的阅读焦点，不是可操作控件。 */
.route-heading:focus,
.route-heading:focus-visible {
  outline: none;
  box-shadow: none;
}

.tag {
  color: var(--color-text);
  background: var(--color-primary-100);
}

.tag.good {
  color: var(--color-text);
  background: var(--color-secondary-100);
}

.tag.warn {
  color: var(--color-text);
  background: var(--color-accent-100);
}

.task-list {
  display: grid;
  gap: 12px;
}

.pf-item {
  width: 100%;
  color: var(--color-text);
  font: inherit;
  text-align: left;
}

#sheet .grip {
  display: block;
  min-width: 44px;
  min-height: 44px;
  margin: -10px auto 0;
  padding: 0;
  background: transparent;
  border: 0;
}

.task-row {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  width: 100%;
  min-height: 76px;
  padding: 14px 16px;
  color: var(--color-text);
  text-align: left;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: 16px;
  box-shadow: var(--shadow-card);
  cursor: pointer;
}

.task-row:disabled {
  cursor: not-allowed;
  opacity: .78;
}

.task-row:not(:disabled):hover {
  background: var(--color-primary-50);
  border-color: var(--color-primary-300);
}

.task-icon {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  color: var(--color-text);
  font-size: 1.2rem;
  font-weight: 800;
  background: var(--color-primary-100);
  border-radius: 14px;
}

.task-icon.secondary {
  background: var(--color-secondary-100);
}

.task-icon.accent {
  background: var(--color-accent-100);
}

.task-copy b,
.task-copy span {
  display: block;
}

.task-copy span {
  margin-top: 3px;
  color: var(--color-text-secondary-aa);
  font-size: .82rem;
}

.task-state {
  color: var(--color-text-secondary-aa);
  font-size: .75rem;
  white-space: nowrap;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.capability-card {
  padding: 12px;
  background: var(--color-primary-50);
  border: 1px solid var(--color-primary-200);
  border-radius: 14px;
}

.capability-card[data-status="available"] {
  background: var(--color-secondary-50);
  border-color: var(--color-secondary-200);
}

.capability-card[data-status="unavailable"] {
  background: var(--color-accent-50);
  border-color: var(--color-accent-200);
}

.capability-card b,
.capability-card span {
  display: block;
}

.capability-card span {
  margin-top: 4px;
  color: var(--color-text-secondary-aa);
  font-size: .78rem;
}

.section-intro {
  margin: 0 0 24px;
}

.section-intro h2 {
  font-size: clamp(1.5rem, 4vw, 2rem);
}

.section-intro p {
  max-width: 60ch;
  margin-top: 6px;
  color: var(--color-text-secondary-aa);
}

.legacy-page {
  max-width: 760px;
}

@media (max-width: 640px) {
  header {
    min-height: 60px;
    padding: 10px 14px;
  }

  header .sub {
    display: none;
  }

  header .hd-right {
    gap: 4px;
  }

  #version-badge,
  #pf-badge,
  #mode-badge {
    max-width: 6.8em;
    min-height: 44px;
    padding: 4px 7px;
    font-size: .66rem;
  }

  nav {
    top: 60px;
    padding: 0 8px;
  }

  nav .tab {
    min-height: 48px;
    font-size: .78rem;
  }

  main {
    padding: 20px 16px 48px;
  }

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

  .task-row {
    grid-template-columns: 44px minmax(0, 1fr);
  }

  .task-icon {
    width: 44px;
    height: 44px;
  }

  .task-state {
    grid-column: 2;
  }
}

@media (min-width: 900px) {
  #shell,
  nav {
    max-width: 1180px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}