/* ── Light theme · Generous spacing ── */
:root {
  --bg:           #f5f3ee;            /* 米白纸感 */
  --bg-grad-1:    #e8e4dc;
  --bg-grad-2:    #f0ece4;
  --surface:      #ffffff;            /* 卡片 */
  --surface-alt:  #faf8f3;            /* 嵌套层 */
  --border:       #e2ddd2;
  --border-soft:  #ece8de;
  --border-strong:#c9c2b1;

  --ink:          #1a1a1a;            /* 主文字 */
  --ink-2:        #4a4a48;            /* 次要 */
  --ink-3:        #8a8780;            /* 弱化 */
  --ink-4:        #b5b2a8;            /* 标签 */

  --accent:       #1a1a1a;            /* 主按钮: 黑 */
  --accent-ink:   #ffffff;
  --ok:           #4a7c4e;            /* 沉静绿 */
  --warn:         #b8862c;            /* 古铜 */
  --err:          #a14444;            /* 暗红 */
  --info:         #4a6a8c;            /* 钢蓝 */

  --shadow-sm:    0 1px 2px rgba(0,0,0,.04);
  --shadow:       0 1px 3px rgba(0,0,0,.04), 0 8px 24px -12px rgba(0,0,0,.08);
  --shadow-lg:    0 1px 3px rgba(0,0,0,.04), 0 16px 40px -16px rgba(0,0,0,.12);

  --radius:       10px;
  --radius-lg:    14px;

  --font:         'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-mono:    'IBM Plex Mono', 'SF Mono', Menlo, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  background-image:
    radial-gradient(at 0% 0%, var(--bg-grad-1) 0px, transparent 50%),
    radial-gradient(at 100% 100%, var(--bg-grad-2) 0px, transparent 50%);
  min-height: 100vh;
  font-feature-settings: 'tnum' on;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
.mono { font-family: var(--font-mono); }
.muted { color: var(--ink-3); }
.center { text-align: center; }
.hidden { display: none !important; }
.link { color: var(--info); text-decoration: none; border-bottom: 1px solid currentColor; }
.link:hover { opacity: .8; }

/* ── Brand mark ── */
.brand-mark {
  width: 22px; height: 22px;
  background: var(--ink);
  transform: rotate(45deg);
  border-radius: 3px;
  position: relative;
}
.brand-mark::after {
  content: ""; position: absolute; inset: 4px;
  background: var(--bg); border-radius: 1px;
}
.brand-mark.sm { width: 16px; height: 16px; }
.brand-mark.sm::after { inset: 3px; }

/* ═══════════ Login ═══════════ */
.login-overlay {
  position: fixed; inset: 0;
  display: flex; align-items: center; justify-content: center;
  padding: 2rem;
  z-index: 999;
}
.login-card {
  width: 100%; max-width: 480px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 3.5rem 3rem;
  box-shadow: var(--shadow-lg);
}
.login-brand { margin-bottom: 2.75rem; }
.login-brand .brand-mark { margin-bottom: 1.25rem; }
.login-brand h1 {
  font-size: 1.5rem; font-weight: 700; letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 0.4rem;
}
.login-brand p {
  font-size: 0.85rem; color: var(--ink-3);
  letter-spacing: 0.02em;
}
#login-form .form-label { display: block; margin-bottom: 0.7rem; }
.input-row {
  display: flex; gap: 0.6rem;
  align-items: stretch;
}
.input-row input { flex: 1; min-width: 0; }
.input-row button { flex: 0 0 auto; padding: 0 1.5rem; }
.err-msg {
  margin-top: 1rem;
  font-size: 0.82rem;
  color: var(--err);
  min-height: 1.2em;
}
.login-foot {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-soft);
  font-size: 0.75rem; color: var(--ink-3);
}
.login-foot .mono { font-size: 0.72rem; }

/* ═══════════ Form inputs ═══════════ */
.form-label {
  display: block;
  font-size: 0.7rem; font-weight: 600; letter-spacing: 0.12em;
  color: var(--ink-3);
  text-transform: uppercase;
  margin-bottom: 0.6rem;
}
input[type="text"], input[type="password"], input:not([type]), textarea {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: 0.8rem 0.95rem;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--ink);
  transition: border-color .15s, box-shadow .15s, background .15s;
}
input:focus, textarea:focus {
  outline: none;
  border-color: var(--ink-2);
  background: var(--surface);
  box-shadow: 0 0 0 3px rgba(26,26,26,.06);
}
textarea {
  font-family: var(--font);
  resize: vertical; min-height: 84px;
  line-height: 1.5;
}

/* ═══════════ Buttons ═══════════ */
.btn-primary, .btn-ghost {
  font-family: var(--font);
  font-size: 0.88rem; font-weight: 600;
  letter-spacing: 0.02em;
  padding: 0.8rem 1.2rem;
  border-radius: var(--radius);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all .15s ease;
  display: inline-flex; align-items: center; justify-content: center;
}
.btn-primary {
  background: var(--ink);
  color: var(--accent-ink);
  border-color: var(--ink);
}
.btn-primary:hover:not(:disabled) {
  background: #000;
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}
.btn-primary:disabled { opacity: .5; cursor: not-allowed; }
.btn-ghost {
  background: transparent;
  color: var(--ink-2);
  border-color: var(--border);
}
.btn-ghost:hover { color: var(--ink); border-color: var(--border-strong); }

/* ═══════════ App layout ═══════════ */
.app {
  display: grid;
  grid-template-columns: 240px 1fr;
  grid-template-rows: auto 1fr;
  grid-template-areas: "topbar topbar" "sidebar main";
  min-height: 100vh;
}

/* ── Topbar ── */
.topbar {
  grid-area: topbar;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.1rem 2rem;
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.brand { display: flex; align-items: center; gap: 0.7rem; }
.brand-name { font-size: 1.05rem; font-weight: 700; letter-spacing: -0.01em; }
.brand-tag {
  font-size: 0.72rem; color: var(--ink-3);
  padding: 0.2rem 0.55rem;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 4px;
}
.topbar-stats { display: flex; align-items: center; gap: 1.75rem; }
.stat { display: flex; flex-direction: column; align-items: flex-end; line-height: 1.15; }
.stat-label { font-size: 0.65rem; letter-spacing: 0.1em; color: var(--ink-4); font-weight: 600; text-transform: uppercase; }
.stat-val { font-size: 0.88rem; font-weight: 600; color: var(--ink); margin-top: 0.15rem; }
.stat.live { flex-direction: row; align-items: center; gap: 0.45rem; }
.stat.live .stat-val { color: var(--ok); margin-top: 0; }
.stat.live.off .stat-val { color: var(--err); }
.dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 0 var(--ok);
  animation: pulse 2s infinite;
}
.stat.live.off .dot { background: var(--err); animation: none; }
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(74,124,78,.45); }
  70%  { box-shadow: 0 0 0 6px rgba(74,124,78,0); }
  100% { box-shadow: 0 0 0 0 rgba(74,124,78,0); }
}

/* ── Sidebar ── */
.sidebar {
  grid-area: sidebar;
  background: rgba(255,255,255,0.4);
  border-right: 1px solid var(--border);
  padding: 1.75rem 1.1rem;
  display: flex; flex-direction: column; justify-content: space-between;
}
.sidebar nav { display: flex; flex-direction: column; gap: 0.25rem; }
.nav-item {
  display: flex; align-items: center; gap: 0.7rem;
  padding: 0.7rem 0.95rem;
  border-radius: 8px;
  color: var(--ink-2);
  font-size: 0.92rem; font-weight: 500;
  cursor: pointer; user-select: none;
  transition: all .15s;
  text-decoration: none;
}
.nav-item:hover { background: var(--surface-alt); color: var(--ink); }
.nav-item.active {
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  padding: calc(0.7rem - 1px) calc(0.95rem - 1px);
}
.nav-icon { font-size: 1rem; opacity: 0.7; }
.side-foot { padding: 1rem 0.95rem 0; border-top: 1px solid var(--border-soft); }
.side-foot-label { font-size: 0.65rem; letter-spacing: 0.1em; color: var(--ink-4); text-transform: uppercase; font-weight: 600; margin-bottom: 0.3rem; }
.side-foot-val { font-size: 0.85rem; color: var(--ink); margin-bottom: 0.6rem; font-weight: 500; }

/* ── Main ── */
.main {
  grid-area: main;
  padding: 2.5rem 3rem;
  overflow-y: auto;
}
.view { display: none; }
.view.active { display: block; }
.view-head { margin-bottom: 2.25rem; }
.view-head h2 {
  font-size: 1.5rem; font-weight: 700; letter-spacing: -0.02em;
  margin-bottom: 0.4rem;
  color: var(--ink);
}
.view-head p { font-size: 0.88rem; color: var(--ink-3); }

/* ── Card ── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
}
.form-card { max-width: 720px; }
.form-card .form-label { margin-top: 1.5rem; }
.form-card .form-label:first-of-type { margin-top: 0; }
.form-card input, .form-card textarea { margin-bottom: 0.5rem; }
.form-actions {
  display: flex; align-items: center; gap: 1.25rem;
  margin-top: 2rem;
}
.hint { font-size: 0.82rem; color: var(--ink-3); }

/* ── Task grid ── */
.task-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.25rem;
}
.task-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem 1.5rem;
  position: relative;
  transition: all .15s;
  box-shadow: var(--shadow-sm);
}
.task-card:hover { transform: translateY(-1px); box-shadow: var(--shadow); border-color: var(--border-strong); }
.task-card::before {
  content: ""; position: absolute; left: 0; top: 1rem; bottom: 1rem; width: 2px;
  border-radius: 0 2px 2px 0;
}
.task-card.running::before { background: var(--warn); }
.task-card.success::before { background: var(--ok); }
.task-card.failed::before  { background: var(--err); }
.task-card.blocked::before { background: var(--ink-3); }
.task-card.accepted::before { background: var(--info); }
.task-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.85rem; }
.task-cid { font-family: var(--font-mono); font-size: 0.74rem; color: var(--ink-3); }
.task-status {
  font-size: 0.65rem; font-weight: 700; letter-spacing: 0.12em;
  padding: 0.22rem 0.55rem; border-radius: 4px;
  text-transform: uppercase; font-family: var(--font-mono);
}
.task-status.running { background: rgba(184,134,44,.12); color: var(--warn); }
.task-status.success { background: rgba(74,124,78,.12); color: var(--ok); }
.task-status.failed  { background: rgba(161,68,68,.12); color: var(--err); }
.task-status.blocked { background: rgba(26,26,26,.08); color: var(--ink-2); }
.task-status.accepted { background: rgba(74,106,140,.12); color: var(--info); }
.task-goal { font-size: 0.95rem; line-height: 1.5; color: var(--ink); margin-bottom: 0.95rem; }
.task-meta {
  display: flex; justify-content: space-between;
  font-size: 0.72rem; color: var(--ink-3);
  font-family: var(--font-mono);
  padding-top: 0.85rem;
  border-top: 1px solid var(--border-soft);
}
.empty {
  padding: 4rem 2rem; text-align: center;
  color: var(--ink-3);
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
  grid-column: 1 / -1;
}

/* ── Table ── */
.table-card { padding: 0; overflow: hidden; }
.data-table { width: 100%; border-collapse: collapse; }
.data-table th, .data-table td {
  padding: 0.95rem 1.5rem; text-align: left;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--border-soft);
}
.data-table th {
  background: var(--surface-alt);
  font-size: 0.7rem; font-weight: 600; letter-spacing: 0.1em;
  color: var(--ink-3);
  text-transform: uppercase;
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--surface-alt); }
.wf-id { font-family: var(--font-mono); color: var(--ink-3); font-size: 0.82rem; }
.wf-name { font-weight: 500; color: var(--ink); }
.wf-badge {
  display: inline-block; padding: 0.18rem 0.5rem; border-radius: 4px;
  font-size: 0.65rem; font-weight: 700; letter-spacing: 0.1em;
  font-family: var(--font-mono); text-transform: uppercase;
}
.wf-badge.on  { background: rgba(74,124,78,.12); color: var(--ok); }
.wf-badge.off { background: rgba(0,0,0,.05); color: var(--ink-3); }
.wf-date { font-family: var(--font-mono); font-size: 0.78rem; color: var(--ink-3); }

/* ── Responsive ── */
@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; grid-template-areas: "topbar" "sidebar" "main"; }
  .sidebar { border-right: none; border-bottom: 1px solid var(--border); padding: 1rem 1.25rem; }
  .sidebar nav { flex-direction: row; overflow-x: auto; gap: 0.4rem; }
  .side-foot { display: none; }
  .topbar { padding: 1rem 1.25rem; }
  .topbar-stats { gap: 1rem; }
  .topbar-stats .stat:not(.live) { display: none; }
  .main { padding: 1.75rem 1.25rem; }
  .login-card { padding: 2.5rem 2rem; }
  .input-row { flex-direction: column; }
  .input-row button { padding: 0.85rem 1rem; }
}