:root {
  --bg: #f4efe5;
  --surface: #fffdf8;
  --surface-soft: #efe8dd;
  --ink: #203641;
  --muted: #70808b;
  --line: rgba(32, 54, 65, 0.12);
  --blue: #145da0;
  --green: #287b63;
  --amber: #ba7a12;
  --red: #b64f46;
  --shadow: 0 18px 38px rgba(32, 54, 65, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "Avenir Next", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at top, rgba(20, 93, 160, 0.14), transparent 18%),
    linear-gradient(180deg, #faf7f0 0%, #f4efe5 100%);
}

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

button {
  cursor: pointer;
}

.mobile-shell {
  max-width: 520px;
  min-height: 100vh;
  margin: 0 auto;
  padding: 18px 18px 92px;
}

.mobile-header,
.mobile-hero,
.mobile-panel,
.mobile-card,
.task-card,
.doc-card,
.message-card {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.mobile-header {
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  padding: 18px;
}

.mobile-eyebrow {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.mobile-header h1,
.mobile-card h2,
.mobile-panel h2,
.task-card h3,
.doc-card h3,
.message-card h3 {
  margin: 0;
}

.mobile-header select,
.mobile-panel input,
.mobile-panel select,
.mobile-panel textarea,
.mobile-panel button,
.task-feedback textarea,
.task-feedback select,
.ask-row input,
.ask-row button {
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid rgba(32, 54, 65, 0.14);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--ink);
}

.mobile-hero {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 14px;
  padding: 16px;
}

.mobile-card {
  padding: 14px;
  background: var(--surface-soft);
}

.mobile-card span {
  color: var(--muted);
  font-size: 12px;
}

.mobile-card strong {
  display: block;
  margin-top: 10px;
  font-size: 24px;
}

.mobile-content {
  margin-top: 14px;
}

.mobile-panel {
  padding: 18px;
}

.mobile-panel h2 {
  font-size: 22px;
}

.mobile-panel p {
  color: var(--muted);
  line-height: 1.6;
}

.form-stack,
.task-stack,
.doc-stack,
.chat-stack {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

.mobile-panel textarea,
.task-feedback textarea {
  min-height: 110px;
  padding: 12px 14px;
  resize: vertical;
}

.primary-button,
.secondary-button {
  min-height: 44px;
  border-radius: 14px;
  border: 1px solid transparent;
  font-weight: 700;
}

.primary-button {
  color: #ffffff;
  background: var(--blue);
}

.secondary-button {
  color: var(--blue);
  background: #ffffff;
  border-color: rgba(20, 93, 160, 0.18);
}

.task-card,
.doc-card,
.message-card {
  padding: 16px;
}

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

.task-feedback {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 28px;
  padding: 0 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
}

.tag.warning {
  color: var(--amber);
  background: rgba(186, 122, 18, 0.12);
}

.tag.high {
  color: var(--red);
  background: rgba(182, 79, 70, 0.12);
}

.tag.normal,
.tag.closed {
  color: var(--green);
  background: rgba(40, 123, 99, 0.12);
}

.ask-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  margin-top: 14px;
}

.mobile-tabs {
  position: fixed;
  right: 16px;
  bottom: 16px;
  left: 16px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255, 253, 248, 0.94);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
}

.mobile-tab {
  min-height: 44px;
  border: 0;
  border-radius: 14px;
  color: var(--muted);
  background: transparent;
  font-weight: 700;
}

.mobile-tab.active {
  color: #ffffff;
  background: var(--blue);
}

.fade-in {
  animation: fadeIn 240ms ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}