:root {
  --bg: #f3f6fb;
  --panel: #ffffff;
  --panel-soft: #f8fafc;
  --ink: #0f172a;
  --muted: #475569;
  --line: #dbe3ef;
  --accent: #0f766e;
  --accent-2: #0a5f58;
  --danger: #be123c;
  --ok: #0f766e;
  --shadow: 0 12px 35px rgba(15, 23, 42, 0.09);
}

:root[data-theme="dark"] {
  --bg: #0b1220;
  --panel: #0f172a;
  --panel-soft: #111b31;
  --ink: #e2e8f0;
  --muted: #94a3b8;
  --line: #27334d;
  --accent: #14b8a6;
  --accent-2: #0ea899;
  --danger: #fb7185;
  --ok: #2dd4bf;
  --shadow: 0 16px 40px rgba(1, 7, 20, 0.45);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 0%, rgba(20, 184, 166, 0.15), transparent 30%),
    radial-gradient(circle at 92% 100%, rgba(14, 165, 233, 0.12), transparent 40%),
    var(--bg);
}

.wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 18px 16px 48px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel) 92%, transparent);
  backdrop-filter: blur(8px);
}

.topbar-left h1 {
  margin: 0;
  font-size: 1.2rem;
}

.topbar-left span {
  display: block;
  color: var(--muted);
  font-size: 0.9rem;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.panel {
  margin-top: 14px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px;
  box-shadow: var(--shadow);
  animation: rise 220ms ease;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.controls-row {
  display: grid;
  grid-template-columns: auto auto 1fr;
  gap: 10px;
  align-items: center;
}

.tabs {
  display: flex;
  gap: 8px;
}

.tabs a {
  text-decoration: none;
  color: var(--muted);
  border: 1px solid var(--line);
  padding: 7px 10px;
  border-radius: 10px;
  font-weight: 600;
}

.tabs a.active {
  color: #ffffff;
  background: var(--accent);
  border-color: var(--accent);
}

.toolbar-buttons {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  margin-top: 12px;
}

.stat-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel-soft);
  padding: 10px;
}

.stat-card div {
  color: var(--muted);
  font-size: 0.86rem;
}

.stat-card strong {
  font-size: 1.35rem;
}

.filter-form select,
.topbar-right select,
.modal-form input,
.modal-form textarea,
.modal-form select,
.auth-form input {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  color: var(--ink);
  padding: 9px 10px;
  font: inherit;
}

button {
  border: 0;
  border-radius: 10px;
  padding: 9px 12px;
  background: var(--accent);
  color: #ffffff;
  cursor: pointer;
  font: inherit;
  font-weight: 600;
}

button:hover {
  background: var(--accent-2);
}

.secondary {
  background: #334155;
}

.secondary:hover {
  background: #1e293b;
}

.task-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.task {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel-soft);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 12px;
  transition: transform 140ms ease, border-color 140ms ease;
}

.task:hover {
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--accent) 35%, var(--line));
}

.task.done .title {
  text-decoration: line-through;
  color: var(--muted);
}

.title {
  font-weight: 700;
}

.meta,
.notes,
.empty {
  margin-top: 3px;
  color: var(--muted);
}

.task-badges {
  margin-top: 7px;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.priority-badge {
  display: inline-block;
  border-radius: 999px;
  padding: 2px 9px;
  font-size: 0.78rem;
  font-weight: 700;
  border: 1px solid var(--line);
}

.priority-low {
  color: #0f766e;
  border-color: #5eead4;
  background: #ccfbf1;
}

.priority-medium {
  color: #b45309;
  border-color: #fcd34d;
  background: #fef3c7;
}

.priority-high {
  color: #b91c1c;
  border-color: #fca5a5;
  background: #fee2e2;
}

.category-badge {
  display: inline-block;
  border-radius: 999px;
  padding: 2px 9px;
  font-size: 0.8rem;
  border: 1px solid var(--category-color);
  background: color-mix(in srgb, var(--category-color) 22%, transparent);
}

.inline-actions {
  flex-direction: row;
  display: flex;
  gap: 7px;
}

.icon-btn {
  width: 34px;
  height: 34px;
  padding: 0;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--panel);
  color: var(--ink);
}

.icon-btn:hover {
  background: color-mix(in srgb, var(--accent) 12%, var(--panel));
}

.icon-btn svg {
  width: 17px;
  height: 17px;
  fill: currentColor;
}

.danger-btn {
  color: var(--danger);
}

.wide-btn {
  width: 100%;
  margin-top: 6px;
}

.is-loading {
  opacity: 0.75;
}

.loading-spinner {
  display: inline-block;
  width: 12px;
  height: 12px;
  margin-right: 7px;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.app-modal {
  width: min(480px, calc(100% - 24px));
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  border-radius: 14px;
  padding: 0;
  box-shadow: var(--shadow);
}

.app-modal::backdrop {
  background: rgba(2, 6, 23, 0.55);
  backdrop-filter: blur(2px);
}

.modal-shell {
  padding: 12px;
}

.modal-shell header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.modal-shell h2 {
  margin: 0;
  font-size: 1.05rem;
}

.modal-form {
  display: grid;
  gap: 8px;
}

.toast {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 40;
  opacity: 0;
  transform: translateY(12px);
  border-radius: 10px;
  padding: 10px 13px;
  border: 1px solid color-mix(in srgb, var(--ok) 55%, var(--line));
  background: color-mix(in srgb, var(--ok) 20%, var(--panel));
  color: var(--ink);
  transition: opacity 180ms ease, transform 180ms ease;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.error-box {
  margin-top: 14px;
  border-radius: 10px;
  padding: 10px;
  border: 1px solid #fecaca;
  color: #991b1b;
  background: #fee2e2;
}

.auth-wrap {
  max-width: 520px;
}

.auth-panel h1 {
  margin: 0;
}

.auth-subtitle {
  margin: 5px 0 10px;
  color: var(--muted);
}

.auth-form {
  display: grid;
  gap: 8px;
}

@media (max-width: 720px) {
  .topbar {
    position: static;
    flex-direction: column;
    align-items: flex-start;
  }

  .controls-row {
    grid-template-columns: 1fr;
  }

  .toolbar-buttons {
    justify-content: flex-start;
  }

  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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