:root {
  --bg: #0f1419;
  --bg-elevated: #171d25;
  --bg-soft: #1e2630;
  --border: #2a3441;
  --text: #e8eef4;
  --muted: #8b9aab;
  --accent: #2dd4a8;
  --accent-dim: #1a9f7a;
  --accent-bg: rgba(45, 212, 168, 0.12);
  --danger: #f07178;
  --warning: #e6c07b;
  --info: #61afef;
  --radius: 10px;
  --font: "Segoe UI", "Helvetica Neue", sans-serif;
  --mono: "Cascadia Code", "Consolas", monospace;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
}

body {
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(45, 212, 168, 0.12), transparent),
    radial-gradient(ellipse 60% 40% at 90% 0%, rgba(97, 175, 239, 0.08), transparent),
    var(--bg);
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-card {
  width: min(420px, 100%);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px 32px;
  box-shadow: var(--shadow);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(145deg, var(--accent), #0d9488);
  display: grid;
  place-items: center;
  font-weight: 800;
  color: #042f2e;
  letter-spacing: -0.04em;
}

.brand h1 {
  margin: 0;
  font-size: 1.45rem;
  letter-spacing: -0.03em;
}

.subtitle {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 0.95rem;
}

label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 6px;
}

.field {
  margin-bottom: 16px;
}

input,
select,
textarea {
  width: 100%;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 10px 12px;
  outline: none;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--accent-dim);
  box-shadow: 0 0 0 3px var(--accent-bg);
}

textarea {
  min-height: 96px;
  resize: vertical;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-radius: 8px;
  padding: 10px 16px;
  cursor: pointer;
  background: var(--bg-soft);
  color: var(--text);
  border: 1px solid var(--border);
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
}

.btn:hover {
  background: #273140;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--accent);
  color: #042f2e;
  border-color: transparent;
  font-weight: 650;
}

.btn-primary:hover {
  background: #5eead4;
}

.btn-danger {
  background: rgba(240, 113, 120, 0.15);
  color: var(--danger);
  border-color: rgba(240, 113, 120, 0.35);
}

.btn-ghost {
  background: transparent;
}

.btn-sm {
  padding: 6px 10px;
  font-size: 0.85rem;
}

.btn-block {
  width: 100%;
}

.error {
  background: rgba(240, 113, 120, 0.12);
  border: 1px solid rgba(240, 113, 120, 0.35);
  color: var(--danger);
  padding: 10px 12px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 0.9rem;
}

/* App shell */
.app {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: 100vh;
}

.sidebar {
  background: rgba(23, 29, 37, 0.95);
  border-right: 1px solid var(--border);
  padding: 20px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: sticky;
  top: 0;
  height: 100vh;
}

.sidebar .brand {
  padding: 4px 8px 18px;
}

.nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid transparent;
}

.nav-link:hover {
  background: var(--bg-soft);
  color: var(--text);
  text-decoration: none;
}

.nav-link.active {
  background: var(--accent-bg);
  color: var(--accent);
  border-color: rgba(45, 212, 168, 0.25);
}

.nav-badge {
  min-width: 22px;
  height: 22px;
  padding: 0 6px;
  border-radius: 999px;
  background: var(--accent);
  color: #042f2e;
  font-size: 0.72rem;
  font-weight: 700;
  display: inline-grid;
  place-items: center;
}

.urgent-banner {
  background: linear-gradient(90deg, rgba(240, 113, 120, 0.22), rgba(230, 192, 123, 0.16));
  border-bottom: 1px solid rgba(240, 113, 120, 0.4);
  padding: 12px 32px;
}

.urgent-banner[hidden] {
  display: none !important;
}

.urgent-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 6px 0;
}

.urgent-item + .urgent-item {
  border-top: 1px solid rgba(240, 113, 120, 0.25);
}

.note-urgent {
  border-color: rgba(240, 113, 120, 0.45);
  background: rgba(240, 113, 120, 0.08);
}

.badge-urgent {
  color: var(--danger);
  border-color: rgba(240, 113, 120, 0.4);
  background: rgba(240, 113, 120, 0.14);
}

.badge-deleted {
  color: var(--danger);
  border-color: rgba(240, 113, 120, 0.35);
  background: rgba(240, 113, 120, 0.12);
}

.badge-edited {
  color: var(--warning);
  border-color: rgba(230, 192, 123, 0.4);
  background: rgba(230, 192, 123, 0.14);
}

.row-deleted td {
  opacity: 0.72;
}

.masked {
  font-family: var(--mono);
  letter-spacing: 0.04em;
  color: var(--muted);
}

.check-row {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  margin-top: 8px;
  cursor: pointer;
}

.check-row input {
  width: auto;
}

.tree-node {
  border-left: 1px solid var(--border);
  padding-left: 12px;
  margin-bottom: 10px;
}

.tree-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
}

.tree-meta {
  color: var(--muted);
  font-size: 0.82rem;
  margin-top: 6px;
}

.tree-desc {
  margin-top: 6px;
  font-size: 0.88rem;
  color: var(--text);
  white-space: pre-wrap;
}

.phase-card {
  margin-bottom: 18px;
}

.phase-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  flex-wrap: wrap;
}

.form-section {
  margin: 18px 0 10px;
  font-size: 0.95rem;
  color: var(--accent);
}

.phase-chips {
  display: grid;
  gap: 10px;
}

.phase-chip {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 0.9rem;
}

@media (max-width: 860px) {
  .tree-row {
    flex-direction: column;
  }
}

.sidebar-footer {
  margin-top: auto;
  padding: 12px 8px 4px;
  border-top: 1px solid var(--border);
}

.user-chip {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 10px;
}

.user-chip strong {
  display: block;
  color: var(--text);
  margin-bottom: 2px;
}

.main {
  padding: 28px 32px 48px;
  max-width: 1200px;
}

.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.page-header h2 {
  margin: 0 0 6px;
  font-size: 1.55rem;
  letter-spacing: -0.03em;
}

.page-header p {
  margin: 0;
  color: var(--muted);
}

.panel {
  display: none;
}

.panel.active {
  display: block;
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}

.stat {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
}

.stat .label {
  color: var(--muted);
  font-size: 0.82rem;
  margin-bottom: 8px;
}

.stat .value {
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 18px;
}

.card h3 {
  margin: 0 0 14px;
  font-size: 1.05rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

th,
td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

th {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: rgba(0, 0, 0, 0.2);
}

tr:last-child td {
  border-bottom: none;
}

.badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--bg-soft);
  color: var(--muted);
  border: 1px solid var(--border);
}

.badge-pending {
  color: var(--warning);
  border-color: rgba(230, 192, 123, 0.35);
  background: rgba(230, 192, 123, 0.12);
}

.badge-in_progress {
  color: var(--info);
  border-color: rgba(97, 175, 239, 0.35);
  background: rgba(97, 175, 239, 0.12);
}

.badge-completed {
  color: var(--accent);
  border-color: rgba(45, 212, 168, 0.35);
  background: var(--accent-bg);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.impersonate-banner {
  display: none;
  background: linear-gradient(90deg, rgba(230, 192, 123, 0.2), rgba(45, 212, 168, 0.12));
  border-bottom: 1px solid rgba(230, 192, 123, 0.35);
  padding: 10px 32px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.impersonate-banner.show {
  display: flex;
}

.note-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.note-item {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
}

.note-item .meta {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 6px;
}

.note-item p {
  margin: 0;
  white-space: pre-wrap;
  line-height: 1.45;
}

.empty {
  color: var(--muted);
  padding: 24px;
  text-align: center;
}

.form-actions {
  display: flex;
  gap: 10px;
  margin-top: 8px;
  flex-wrap: wrap;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: none;
  place-items: center;
  padding: 20px;
  z-index: 50;
}

.modal-backdrop.open {
  display: grid;
}

.modal {
  width: min(520px, 100%);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px;
  box-shadow: var(--shadow);
}

.modal h3 {
  margin: 0 0 16px;
}

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

  .sidebar {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }

  .main {
    padding: 20px 16px 40px;
  }

  .impersonate-banner {
    padding: 10px 16px;
    flex-direction: column;
    align-items: flex-start;
  }
}