/* ===========================================================================
   ToDoIst — application styles (complements Bootstrap 5)
   =========================================================================== */

:root {
  --tl-bg: #f4f6fb;
  --tl-surface: #ffffff;
  --tl-border: #e6e9f2;
  --tl-ink: #1f2733;
  --tl-muted: #6b7688;
  --tl-brand: #4f46e5;
  --tl-brand-soft: #eef0ff;
  --tl-high: #dc2626;
  --tl-medium: #d97706;
  --tl-low: #0891b2;
  --tl-done: #16a34a;
  --tl-radius: 14px;
  --tl-shadow: 0 1px 2px rgba(16, 24, 40, .05), 0 8px 24px rgba(16, 24, 40, .06);
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--tl-bg);
  color: var(--tl-ink);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* ---- Boot splash (shown before React mounts) --------------------------- */
.boot-splash {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

/* ---- App shell ---------------------------------------------------------- */
.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 264px 1fr;
}

.sidebar {
  background: var(--tl-surface);
  border-right: 1px solid var(--tl-border);
  padding: 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  gap: .75rem;
  position: sticky;
  top: 0;
  height: 100vh;
}

.brand {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -.02em;
  color: var(--tl-ink);
  text-decoration: none;
  padding: .35rem .5rem;
}
.brand .brand-mark {
  width: 34px; height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--tl-brand), #7c6cf5);
  color: #fff;
  display: grid; place-items: center;
  font-size: 1.05rem;
}

.nav-link-tl {
  display: flex; align-items: center; gap: .6rem;
  padding: .55rem .7rem;
  border-radius: 10px;
  color: var(--tl-muted);
  text-decoration: none;
  font-weight: 600;
  transition: background .12s ease, color .12s ease;
}
.nav-link-tl:hover { background: var(--tl-brand-soft); color: var(--tl-brand); }
.nav-link-tl.active { background: var(--tl-brand); color: #fff; }

.list-item-tl {
  display: flex; align-items: center; justify-content: space-between; gap: .5rem;
  padding: .5rem .7rem;
  border-radius: 10px;
  color: var(--tl-ink);
  text-decoration: none;
  font-weight: 600;
}
.list-item-tl:hover { background: #f2f4fb; }
.list-item-tl.active { background: var(--tl-brand-soft); color: var(--tl-brand); }
.list-count {
  font-size: .75rem; font-weight: 700;
  background: #eef1f8; color: var(--tl-muted);
  border-radius: 999px; padding: .1rem .5rem;
}

.sidebar-footer { margin-top: auto; }
.user-chip {
  display: flex; align-items: center; gap: .6rem;
  padding: .5rem .6rem; border-radius: 10px; background: #f7f8fc;
}
.avatar {
  width: 34px; height: 34px; border-radius: 999px;
  background: var(--tl-brand-soft); color: var(--tl-brand);
  display: grid; place-items: center; font-weight: 800; text-transform: uppercase;
}

/* ---- Main content ------------------------------------------------------- */
.main { padding: 1.5rem clamp(1rem, 3vw, 2.25rem) 3rem; }
.page-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: 1.25rem; flex-wrap: wrap; }
.page-title { font-size: 1.6rem; font-weight: 800; letter-spacing: -.02em; margin: 0; }
.page-sub { color: var(--tl-muted); margin: .15rem 0 0; font-size: .95rem; }

/* ---- Cards -------------------------------------------------------------- */
.card-tl {
  background: var(--tl-surface);
  border: 1px solid var(--tl-border);
  border-radius: var(--tl-radius);
  box-shadow: var(--tl-shadow);
}

.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin-bottom: 1.5rem; }
.stat-card { padding: 1.1rem 1.2rem; }
.stat-label { color: var(--tl-muted); font-size: .8rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; }
.stat-value { font-size: 2rem; font-weight: 800; line-height: 1.1; margin-top: .35rem; }
.stat-icon { width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; font-size: 1.2rem; }

.panel { padding: 1.1rem 1.2rem; margin-bottom: 1.5rem; }
.panel h6 { font-weight: 800; text-transform: uppercase; letter-spacing: .04em; color: var(--tl-muted); font-size: .78rem; margin: 0 0 .9rem; }

/* ---- Toolbar / filters -------------------------------------------------- */
.toolbar { display: flex; gap: .6rem; align-items: center; flex-wrap: wrap; margin-bottom: 1.25rem; }
.search-box { position: relative; flex: 1 1 240px; min-width: 200px; }
.search-box i { position: absolute; left: .8rem; top: 50%; transform: translateY(-50%); color: var(--tl-muted); }
.search-box input { padding-left: 2.3rem; }

/* ---- Task rows ---------------------------------------------------------- */
.task-list { display: flex; flex-direction: column; gap: .6rem; }
.task-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: .85rem;
  padding: .85rem 1rem;
}
.task-title { font-weight: 700; }
.task-row.done .task-title { text-decoration: line-through; color: var(--tl-muted); }
.task-notes { color: var(--tl-muted); font-size: .9rem; margin-top: .15rem; }
.task-meta { display: flex; align-items: center; gap: .5rem; flex-wrap: wrap; justify-content: flex-end; }

.check-btn {
  width: 26px; height: 26px; border-radius: 8px;
  border: 2px solid #cfd6e4; background: #fff; color: transparent;
  display: grid; place-items: center; cursor: pointer; padding: 0;
  transition: all .12s ease; font-size: .95rem; line-height: 1;
}
.check-btn:hover { border-color: var(--tl-done); }
.task-row.done .check-btn { background: var(--tl-done); border-color: var(--tl-done); color: #fff; }

.badge-prio { font-size: .72rem; font-weight: 800; padding: .25rem .6rem; border-radius: 999px; text-transform: uppercase; letter-spacing: .03em; }
.prio-high   { background: #fee2e2; color: var(--tl-high); }
.prio-medium { background: #fef3c7; color: var(--tl-medium); }
.prio-low    { background: #cffafe; color: var(--tl-low); }

.due-chip { font-size: .8rem; font-weight: 600; color: var(--tl-muted); display: inline-flex; align-items: center; gap: .35rem; }
.due-chip.overdue { color: var(--tl-high); background: #fee2e2; padding: .15rem .55rem; border-radius: 999px; }

.icon-btn {
  border: none; background: transparent; color: var(--tl-muted);
  width: 34px; height: 34px; border-radius: 9px; display: grid; place-items: center; cursor: pointer;
}
.icon-btn:hover { background: #f2f4fb; color: var(--tl-ink); }
.icon-btn.danger:hover { background: #fee2e2; color: var(--tl-high); }

/* ---- Empty / loading states -------------------------------------------- */
.empty-state { text-align: center; padding: 3rem 1rem; color: var(--tl-muted); }
.empty-state i { font-size: 2.5rem; opacity: .5; display: block; margin-bottom: .75rem; }

.loading-row { display: flex; align-items: center; gap: .8rem; padding: 1rem; color: var(--tl-muted); }

/* ---- Auth ---------------------------------------------------------------- */
.auth-wrap { min-height: 100vh; display: grid; place-items: center; padding: 1.5rem; background: radial-gradient(1200px 600px at 20% -10%, #eef0ff, transparent), var(--tl-bg); }
.auth-card { width: 100%; max-width: 420px; padding: 2rem; }
.auth-brand { display: flex; align-items: center; gap: .6rem; font-weight: 800; font-size: 1.35rem; margin-bottom: 1.25rem; }

/* ---- Modal --------------------------------------------------------------- */
.modal-tl-backdrop { position: fixed; inset: 0; background: rgba(17, 24, 39, .45); display: grid; place-items: center; padding: 1rem; z-index: 1050; }
.modal-tl-card { width: 100%; max-width: 520px; padding: 1.5rem; }

/* ---- Toast --------------------------------------------------------------- */
.toast-stack { position: fixed; right: 1rem; bottom: 1rem; display: flex; flex-direction: column; gap: .6rem; z-index: 2000; }
.toast-tl { min-width: 240px; padding: .8rem 1rem; border-radius: 12px; color: #fff; box-shadow: var(--tl-shadow); display: flex; align-items: center; gap: .6rem; font-weight: 600; }
.toast-tl.success { background: var(--tl-done); }
.toast-tl.error { background: var(--tl-high); }

/* ---- Responsive ---------------------------------------------------------- */
@media (max-width: 900px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; flex-direction: row; align-items: center; overflow-x: auto; gap: .5rem; padding: .75rem; border-right: none; border-bottom: 1px solid var(--tl-border); }
  .brand span.brand-text { display: none; }
  .sidebar-footer, .list-nav { margin-top: 0; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .task-row { grid-template-columns: auto 1fr; }
  .task-meta { grid-column: 1 / -1; justify-content: flex-start; margin-top: .35rem; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); gap: .75rem; }
}