:root {
  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --line: #e5e7eb;
  --primary: #2563eb;
  --primary-weak: #eaf1ff;
  --danger: #dc2626;
  --danger-weak: #fee2e2;
  --warn: #b45309;
  --warn-weak: #fef3c7;
  --ok: #15803d;
  --ok-weak: #dcfce7;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .05), 0 1px 3px rgba(16, 24, 40, .06);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.6 -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}
body.no-scroll { overflow: hidden; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4, p { margin: 0; }
button, input, select, textarea { font: inherit; color: inherit; }
[hidden] { display: none !important; }

.boot { padding: 80px 0; text-align: center; color: var(--muted); }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.grow { flex: 1; min-width: 0; }
.row { display: flex; gap: 10px; align-items: flex-end; }
.wrap { flex-wrap: wrap; }
.between { justify-content: space-between; align-items: center; }
.center { text-align: center; }

/* ---------- 按钮 / 表单 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  height: 38px; padding: 0 14px; border-radius: 9px;
  border: 1px solid var(--line); background: #fff; cursor: pointer;
  white-space: nowrap; transition: background .15s, border-color .15s;
}
.btn:hover { background: #f3f4f6; }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.primary:hover { background: #1d4ed8; }
.btn.danger { color: var(--danger); border-color: #fecaca; }
.btn.danger:hover { background: var(--danger-weak); }
.btn.ghost { border-color: transparent; background: transparent; }
.btn.sm { height: 32px; padding: 0 10px; font-size: 13px; }
.btn.block { width: 100%; }
.btn svg, .nav-item svg { width: 18px; height: 18px; flex: none; }

label.field { display: block; margin-bottom: 14px; }
label.field > span { display: block; margin-bottom: 5px; font-size: 13px; color: var(--muted); }
input[type=text], input[type=email], input[type=url], input[type=date], input[type=search], input:not([type]), select, textarea {
  width: 100%; border: 1px solid #d1d5db; border-radius: 9px; background: #fff;
  padding: 8px 11px; min-height: 38px; outline: none;
}
textarea { resize: vertical; min-height: 110px; line-height: 1.6; }
input:focus, select:focus, textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37, 99, 235, .15); }
.form-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 18px; }
.hint { font-size: 13px; color: var(--muted); margin-top: 10px; }
.hint.err { color: var(--danger); }

/* ---------- 登录 ---------- */
.auth-wrap { min-height: 100vh; display: grid; place-items: center; padding: 20px; }
.auth-card { width: 100%; max-width: 400px; background: var(--card); border-radius: 16px; padding: 28px 24px; box-shadow: var(--shadow); border: 1px solid var(--line); }
.auth-card h1 { font-size: 22px; margin-bottom: 6px; }
.auth-card .sub { color: var(--muted); margin-bottom: 22px; font-size: 14px; }

/* ---------- 顶栏与导航 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 20; background: #fff; border-bottom: 1px solid var(--line);
  padding-top: env(safe-area-inset-top);
}
.topbar-in { max-width: 1080px; margin: 0 auto; padding: 0 16px; height: 56px; display: flex; align-items: center; gap: 18px; }
.brand { font-weight: 700; font-size: 17px; letter-spacing: .3px; }
.nav { display: flex; gap: 4px; flex: 1; }
.nav-item {
  display: inline-flex; align-items: center; gap: 6px; padding: 7px 12px; border-radius: 8px;
  color: var(--muted); font-size: 14px; cursor: pointer;
}
.nav-item:hover { background: #f3f4f6; text-decoration: none; }
.nav-item.active { color: var(--primary); background: var(--primary-weak); font-weight: 600; }
.userbox { margin-left: auto; display: flex; align-items: center; gap: 8px; font-size: 14px; }
.userbox .name { max-width: 110px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.tabbar { display: none; }

main { max-width: 1080px; margin: 0 auto; padding: 20px 16px 60px; }
.page-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.page-head h2 { font-size: 20px; }

/* ---------- 卡片、徽标 ---------- */
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 14px 16px; }
.stack > * + * { margin-top: 10px; }
.list { display: grid; gap: 10px; }

.badge { display: inline-block; padding: 1px 9px; border-radius: 999px; font-size: 12px; line-height: 20px; font-weight: 600; white-space: nowrap; }
.pri-high { background: var(--danger-weak); color: var(--danger); }
.pri-medium { background: var(--warn-weak); color: var(--warn); }
.pri-low { background: #e5e7eb; color: #4b5563; }
.st-todo { background: #e5e7eb; color: #374151; }
.st-doing { background: var(--primary-weak); color: var(--primary); }
.st-done { background: var(--ok-weak); color: var(--ok); }
.role-admin { background: #ede9fe; color: #6d28d9; }
.role-member { background: #e5e7eb; color: #4b5563; }
.due.danger { color: var(--danger); font-weight: 600; }
.due.warn { color: var(--warn); font-weight: 600; }
.flag-ok { color: var(--ok); }
.flag-none { color: var(--muted); }

.task-card { display: block; color: inherit; }
.task-card:hover { text-decoration: none; border-color: #bfd3ff; }
.task-card h3 { font-size: 16px; margin-bottom: 8px; word-break: break-word; }
.task-meta { display: flex; flex-wrap: wrap; gap: 6px 14px; align-items: center; font-size: 13px; color: var(--muted); }

/* 筛选条 */
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.filters > * { flex: 1 1 140px; min-width: 0; }
.filters .wide { flex: 2 1 200px; }
.chips { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.chip { border: 1px solid var(--line); background: #fff; border-radius: 999px; padding: 5px 14px; cursor: pointer; font-size: 14px; }
.chip.on { background: var(--primary); color: #fff; border-color: var(--primary); }

/* 概览 */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 10px; margin-bottom: 16px; }
.stat { padding: 14px 16px; }
.stat .num { font-size: 26px; font-weight: 700; line-height: 1.2; }
.stat .lab { font-size: 13px; color: var(--muted); }
.stat.warn .num { color: var(--danger); }
.bar { height: 8px; background: #e5e7eb; border-radius: 999px; overflow: hidden; }
.bar > i { display: block; height: 100%; background: var(--primary); border-radius: 999px; }
.bar.ok > i { background: #22c55e; }
.member-row { display: grid; grid-template-columns: 150px 1fr 150px; gap: 14px; align-items: center; padding: 12px 0; border-top: 1px solid var(--line); }
.member-row:first-child { border-top: 0; }
.member-row .nums { font-size: 13px; color: var(--muted); text-align: right; }
h3.section { font-size: 16px; margin: 22px 0 10px; }

/* 详情 */
.back { display: inline-flex; align-items: center; gap: 4px; margin-bottom: 12px; color: var(--muted); cursor: pointer; font-size: 14px; }
.detail-title { font-size: 21px; line-height: 1.4; word-break: break-word; }
.kv { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin: 14px 0; }
.kv div span { display: block; font-size: 12px; color: var(--muted); }
.desc { white-space: pre-wrap; word-break: break-word; background: #f9fafb; border-radius: 9px; padding: 12px 14px; margin-top: 4px; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 9px; overflow: hidden; background: #fff; }
.seg button { border: 0; background: transparent; padding: 7px 14px; cursor: pointer; font-size: 14px; border-right: 1px solid var(--line); }
.seg button:last-child { border-right: 0; }
.seg button.on { background: var(--primary); color: #fff; }
.seg button:disabled { cursor: not-allowed; opacity: .6; }
.section-title { display: flex; align-items: center; justify-content: space-between; margin: 0 0 10px; gap: 10px; flex-wrap: wrap; }
.section-title h3 { font-size: 16px; }

.link-row { display: grid; grid-template-columns: 1fr 1.6fr auto; gap: 8px; margin-bottom: 8px; align-items: center; }
.file-item { display: flex; align-items: center; gap: 8px; padding: 8px 10px; border: 1px solid var(--line); border-radius: 9px; margin-bottom: 8px; background: #fafafa; }
.file-item .fname { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-item .tag { font-size: 12px; color: var(--primary); }
.out-links a, .out-files button.linkbtn { display: inline-flex; align-items: center; gap: 4px; margin: 2px 12px 2px 0; word-break: break-all; }
button.linkbtn { background: none; border: 0; padding: 0; color: var(--primary); cursor: pointer; text-align: left; }
button.linkbtn:hover { text-decoration: underline; }
.out-text { white-space: pre-wrap; word-break: break-word; margin: 8px 0; }
.out-text.clamp { display: -webkit-box; -webkit-line-clamp: 4; -webkit-box-orient: vertical; overflow: hidden; }
.out-title { font-weight: 600; font-size: 16px; color: var(--text); }
.empty { text-align: center; color: var(--muted); padding: 36px 12px; background: #fff; border: 1px dashed #d1d5db; border-radius: var(--radius); }

/* 弹窗 / toast */
#modal { position: fixed; inset: 0; z-index: 50; display: grid; place-items: center; padding: 16px; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(17, 24, 39, .45); }
.modal-card { position: relative; width: 100%; max-width: 520px; max-height: 92vh; overflow: auto; background: #fff; border-radius: 16px; padding: 20px; box-shadow: 0 20px 40px rgba(0, 0, 0, .2); }
.modal-card h3 { font-size: 18px; margin-bottom: 14px; }
#toasts { position: fixed; left: 0; right: 0; bottom: 78px; display: grid; justify-items: center; gap: 8px; z-index: 60; pointer-events: none; padding: 0 12px; }
.toast { background: #111827; color: #fff; padding: 9px 16px; border-radius: 9px; font-size: 14px; box-shadow: 0 6px 18px rgba(0, 0, 0, .25); max-width: 100%; }
.toast.err { background: var(--danger); }

/* ---------- 移动端 ---------- */
.project-eyebrow { color: var(--primary); font-size: 12px; font-weight: 600; margin-bottom: 8px; }
.project-login-note { color: var(--muted); font-size: 13px; margin-bottom: 16px; }
.project-hero { padding: 24px; background: linear-gradient(120deg, #fff, #eaf1ff); }
.project-hero h1 { font-size: 28px; margin: 4px 0 8px; }
.project-hero > p { color: var(--muted); }
.project-companies { display: flex; flex-wrap: wrap; gap: 12px 24px; margin-top: 18px; font-size: 13px; }
.project-companies span { display: block; color: var(--muted); font-size: 12px; }
.project-dependency { margin-top: 14px; border-left: 4px solid var(--primary); }
.project-dependency p { color: var(--muted); font-size: 14px; margin-top: 4px; }
.project-milestone { display: grid; grid-template-columns: 185px 1fr; gap: 18px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.project-milestone:last-child { border-bottom: 0; }
.project-milestone time { color: var(--primary); font-size: 13px; font-weight: 600; }
.project-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.project-grid ol, .project-rules { padding-left: 21px; margin: 8px 0; font-size: 14px; }
.project-grid li, .project-rules li { margin: 7px 0; }
.project-speaking { border-top: 1px solid var(--line); margin-top: 14px; padding-top: 10px; font-size: 13px; color: var(--primary); }
.project-source { margin-top: 16px; }
@media (min-width: 721px) and (max-width: 1050px) {
  .topbar-in { gap: 8px; }
  .nav-item { padding: 7px; font-size: 13px; }
  .userbox .name { display: none; }
}
@media (max-width: 720px) {
  .project-grid { grid-template-columns: 1fr; }
  .project-hero { padding: 18px; }
  .project-hero h1 { font-size: 23px; }
  .project-milestone { grid-template-columns: 1fr; gap: 4px; }
  body { font-size: 15px; }
  .topbar-in { height: 52px; gap: 10px; }
  .nav { display: none; }
  .tabbar {
    display: flex; position: fixed; left: 0; right: 0; bottom: 0; z-index: 30; background: #fff;
    border-top: 1px solid var(--line); padding-bottom: env(safe-area-inset-bottom);
  }
  .tabbar a { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 7px 0 6px; font-size: 11.5px; color: var(--muted); }
  .tabbar a:hover { text-decoration: none; }
  .tabbar a svg { width: 22px; height: 22px; }
  .tabbar a.active { color: var(--primary); font-weight: 600; }
  main { padding: 14px 12px 90px; }
  .member-row { grid-template-columns: 1fr; gap: 6px; }
  .member-row .nums { text-align: left; }
  .link-row { grid-template-columns: 1fr auto; }
  .link-row input:nth-child(2) { grid-column: 1 / -1; grid-row: 2; }
  .link-row .btn { grid-column: 2; grid-row: 1; }
  .userbox .name { display: none; }
  .modal-card { padding: 16px; max-height: 94vh; }
  #modal { align-items: end; padding: 0; }
  .modal-card { border-radius: 16px 16px 0 0; max-width: none; }
  .row.stackm { flex-direction: column; align-items: stretch; }
  .page-head h2 { font-size: 18px; }
  .seg button { padding: 7px 11px; }
}