:root {
  color-scheme: light;
  --bg: #eef2f6;
  --surface: #ffffff;
  --surface-soft: #f7f9fc;
  --ink: #17202f;
  --muted: #667085;
  --line: #d9e0ea;
  --primary: #175cd3;
  --primary-dark: #123f91;
  --success: #078047;
  --warn: #b54708;
  --danger: #b42318;
  --accent: #0f766e;
  --shadow: 0 18px 55px rgba(15, 23, 42, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(135deg, rgba(23, 92, 211, 0.08), rgba(15, 118, 110, 0.1)),
    var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

button {
  cursor: pointer;
}

.hidden {
  display: none !important;
}

.auth-shell {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) minmax(320px, 430px);
  gap: 32px;
  align-items: center;
  min-height: 100vh;
  padding: 40px;
}

.brand-panel {
  max-width: 680px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark.small {
  width: 42px;
  height: 42px;
  font-size: 0.9rem;
}

.brand-panel h1 {
  margin: 24px 0 12px;
  max-width: 620px;
  font-size: clamp(2.4rem, 6vw, 5.2rem);
  line-height: 0.95;
  letter-spacing: 0;
}

.brand-panel p {
  max-width: 570px;
  color: var(--muted);
  font-size: 1.1rem;
  line-height: 1.6;
}

.demo-box {
  display: grid;
  gap: 8px;
  max-width: 460px;
  margin-top: 28px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
}

.demo-box span {
  color: var(--muted);
  word-break: break-word;
}

.auth-card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 20px;
}

.tab {
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-soft);
  color: var(--muted);
  font-weight: 700;
}

.tab.active {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

.stack {
  display: grid;
  gap: 14px;
}

label {
  display: grid;
  gap: 7px;
  color: #344054;
  font-size: 0.9rem;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  padding: 10px 12px;
  outline: none;
}

textarea {
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(23, 92, 211, 0.15);
}

.primary-btn,
.ghost-btn,
.danger-btn,
.status-btn {
  min-height: 42px;
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 10px 14px;
  font-weight: 800;
}

.primary-btn {
  background: var(--primary);
  color: #fff;
}

.primary-btn:hover {
  background: var(--primary-dark);
}

.ghost-btn {
  border-color: var(--line);
  background: #fff;
  color: var(--ink);
}

.danger-btn {
  background: #fff1f0;
  color: var(--danger);
  border-color: #fecdca;
}

.status-btn {
  background: #ecfdf3;
  color: var(--success);
  border-color: #abefc6;
}

.message,
.alert {
  color: var(--danger);
  min-height: 22px;
}

.app-shell {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  position: sticky;
  top: 0;
  display: flex;
  flex-direction: column;
  gap: 28px;
  height: 100vh;
  padding: 22px;
  border-right: 1px solid var(--line);
  background: #111827;
  color: #fff;
}

.brand-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-row span {
  display: block;
  color: #b9c3d3;
  font-size: 0.85rem;
}

nav {
  display: grid;
  gap: 8px;
}

.nav-link {
  min-height: 42px;
  display: flex;
  align-items: center;
  padding: 10px 12px;
  border-radius: 8px;
  color: #d0d5dd;
  text-decoration: none;
  font-weight: 750;
}

.nav-link.active,
.nav-link:hover {
  background: #263244;
  color: #fff;
}

.sidebar .ghost-btn {
  margin-top: auto;
  background: transparent;
  color: #fff;
}

.workspace {
  min-width: 0;
  padding: 28px;
}

.topbar,
.section-head,
.board-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 22px;
}

.topbar h2,
.section-head h3,
.board-header h3 {
  margin: 2px 0 0;
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0;
}

.user-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 42px;
  max-width: 320px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 8px 12px;
  color: var(--muted);
  font-weight: 750;
}

.alert {
  margin-bottom: 18px;
  padding: 12px 14px;
  border: 1px solid #fecdca;
  border-radius: 8px;
  background: #fff1f0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(150px, 1fr));
  gap: 14px;
  margin-bottom: 26px;
}

.stat-card,
.item-card,
.task-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
}

.stat-card {
  padding: 16px;
}

.stat-card span {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
}

.stat-card strong {
  display: block;
  margin-top: 6px;
  font-size: 2rem;
}

.kanban {
  display: grid;
  grid-template-columns: repeat(3, minmax(220px, 1fr));
  gap: 16px;
}

.column {
  min-height: 340px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.62);
}

.column h4 {
  margin: 4px 4px 12px;
}

.task-card {
  display: grid;
  gap: 10px;
  margin-bottom: 10px;
  padding: 14px;
}

.task-card h5,
.item-card h4 {
  margin: 0;
}

.task-card p,
.item-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
}

.meta-row,
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  border-radius: 999px;
  padding: 4px 9px;
  background: var(--surface-soft);
  color: #475467;
  font-size: 0.78rem;
  font-weight: 850;
}

.pill.high {
  background: #fff1f0;
  color: var(--danger);
}

.pill.medium {
  background: #fff7ed;
  color: var(--warn);
}

.pill.low {
  background: #ecfdf3;
  color: var(--success);
}

.pill.overdue {
  background: #fef3f2;
  color: var(--danger);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(180px, 1fr));
  gap: 14px;
  margin-bottom: 22px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.wide {
  grid-column: span 2;
}

.item-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
}

.item-card {
  display: grid;
  gap: 12px;
  padding: 16px;
}

@media (max-width: 900px) {
  .auth-shell,
  .app-shell {
    grid-template-columns: 1fr;
  }

  .auth-shell {
    padding: 24px;
  }

  .sidebar {
    position: static;
    height: auto;
  }

  nav {
    grid-template-columns: repeat(4, 1fr);
  }

  .stats-grid,
  .kanban,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .wide {
    grid-column: auto;
  }
}

@media (max-width: 560px) {
  .workspace {
    padding: 18px;
  }

  .topbar,
  .section-head,
  .board-header {
    align-items: stretch;
    flex-direction: column;
  }

  nav {
    grid-template-columns: 1fr 1fr;
  }
}