:root {
  --background: #0f172a;
  --panel: #111827;
  --muted: #94a3b8;
  --text: #e5e7eb;
  --accent: #22c55e;
  --danger: #ef4444;
  --warning: #f59e0b;
  --ring: #60a5fa;
  --border: #1f2937;

  --high: #ef4444;
  --normal: #22c55e;
  --low: #a78bfa;
}
[hidden] {
  display: none !important;
}
* { box-sizing: border-box; }
html, body { height: 100%; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans";
  background: linear-gradient(160deg, #0b1022, #0c1024 60%, #0e132a);
  color: var(--text);
  min-height: 100svh;
}

.page {
  display: grid;
  place-items: start center;
  padding: 24px;
}

.todo-app {
  width: 100%;
  max-width: 880px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 10px 30px rgba(0,0,0,.35);
}

h1 {
  margin: 0 0 16px;
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
}

/* Form layout */
.add-task-form {
  display: grid;
  grid-template-columns: 1fr 1fr 180px 180px auto;
  gap: 12px;
  align-items: end;
  margin-bottom: 16px;
}

.field { display: grid; gap: 6px; }
.field--full { grid-column: 1 / -1; }
.field-label { font-size: .9rem; color: var(--muted); }

#task-title-input,
#task-desc-input,
#priority-input,
#due-input,
.search-input,
.task-input-edit,
select,
textarea,
input[type="text"],
input[type="date"] {
  width: 100%;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid #273247;
  background: #0b1220;
  color: var(--text);
  outline: none;
}

#task-title-input:focus,
#task-desc-input:focus,
#priority-input:focus,
#due-input:focus,
.search-input:focus,
.task-input-edit:focus,
select:focus,
textarea:focus,
input[type="text"]:focus,
input[type="date"]:focus {
  border-color: var(--ring);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--ring) 30%, transparent);
}

.button {
  border: none;
  border-radius: 12px;
  padding: 10px 14px;
  font-weight: 600;
  cursor: pointer;
  background: #1f2937;
  color: var(--text);
  transition: transform .05s ease, opacity .2s ease;
}
.button:active { transform: translateY(1px); }
.button:focus-visible { outline: 2px solid var(--ring); outline-offset: 2px; }
.button-primary { background: var(--accent); color: #062111; }
.button-neutral { background: #172035; }
.button-warning { background: var(--warning); color: #1b1003; }
.button-danger  { background: var(--danger); }

.status-message { min-height: 1.2em; color: var(--muted); font-size: .95rem; }

.bar-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin: 8px 0 10px;
}

.task-count { color: var(--muted); font-size: .95rem; }

.task-controls {
  display: grid;
  grid-template-columns: auto auto auto;
  gap: 10px;
  align-items: center;
  margin: 10px 0 8px;
}
.filter-group { display: flex; gap: 6px; }
.sort-group select { min-width: 200px; }
.bulk-group { justify-self: end; }
.button.is-current { outline: 2px solid var(--ring); }

/* List */
.task-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.task-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: center;
  background: #0b1220;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
}

.task-left { display: grid; grid-template-columns: auto 1fr; gap: 10px; align-items: start; }
.task-title { font-weight: 700; line-height: 1.35; }
.task-text { margin-top: 6px; line-height: 1.45; overflow-wrap: anywhere; word-break: break-word; white-space: normal; }
.task-done .task-title { text-decoration: line-through; opacity: .75; }
.task-done .task-text { text-decoration: line-through; opacity: .7; }

.task-meta { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 8px; font-size: .85rem; color: var(--muted); }
.badge { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--border); padding: 2px 8px; border-radius: 999px; font-size: .8rem; }
.badge-priority-high { border-color: color-mix(in oklab, var(--high) 60%, #000); }
.badge-priority-normal { border-color: color-mix(in oklab, var(--normal) 60%, #000); }
.badge-priority-low { border-color: color-mix(in oklab, var(--low) 60%, #000); }
.badge-overdue { border-color: color-mix(in oklab, var(--danger) 60%, #000); color: var(--danger); }

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

.task-text.is-clamped {
  line-clamp: 3;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  overflow: hidden;
}
.text-toggle { margin-top: 6px; padding: 6px 10px; }

/* Empty */
.empty-state {
  border: 1px dashed #263246;
  border-radius: 12px;
  padding: 18px;
  text-align: center;
  color: var(--muted);
}

/* Confirm Modal */
.confirm-overlay {
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 23, 0.6);
  display: grid;
  place-items: center;
  z-index: 1000;
}
.confirm-modal {
  width: min(520px, 92vw);
  background: #0b1220;
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 20px 60px rgba(0,0,0,.55);
}
.confirm-header { padding: 14px 16px; border-bottom: 1px solid var(--border); }
.confirm-header h2 { margin: 0; font-size: 1.1rem; }
.confirm-body { padding: 14px 16px; }
.confirm-detail { margin-top: 8px; color: var(--muted); font-size: .95rem; }
.confirm-actions { display: flex; gap: 8px; justify-content: flex-end; padding: 12px 16px; border-top: 1px solid var(--border); }

/* History Bar */
.history-bar {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: 20px;
  background: #0b1220;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 14px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: 0 10px 30px rgba(0,0,0,.45);
  z-index: 950;
}
.history-actions { display: flex; gap: 8px; }

/* screen-reader */
.sr-only {
  position: absolute !important;
  height: 1px; width: 1px;
  overflow: hidden;
  clip: rect(1px, 1px, 1px, 1px);
  white-space: nowrap;
  border: 0; padding: 0; margin: -1px;
}

/* Responsive */
@media (max-width: 980px) {
  .add-task-form { grid-template-columns: 1fr 1fr 1fr 1fr auto; }
}
@media (max-width: 720px) {

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

  /* Make title and description full width */
  .field--full {
    grid-column: 1 / -1;
  }

  /* Put the Add button on its own row full width */
  #add-task-button {
    width: 100%;
  }

  /* Controls stack vertically */
  .task-controls {
    grid-template-columns: 1fr;
  }
  .bulk-group { justify-self: start; }

  /* Slightly smaller modal */
  .confirm-modal { width: min(520px, 96vw); }
}

.confirm-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

@media (max-width: 420px) {
  .confirm-header .button { width: auto; padding: 6px 10px; }
}


@media (max-width: 560px) {
  .task-item { padding: 10px; }
  .button { padding: 8px 10px; }
  
  #priority-input,
  #due-input {
    font-size: 0.95rem;
  }

  /* History bar fits smaller screens */
  .history-bar {
    width: calc(100vw - 24px);
    left: 12px;
    transform: none;
  }
}

@media (max-width: 420px) {
  h1 { font-size: 1.1rem; }
  .field-label { font-size: 0.85rem; }

  /* Form becomes single column */
  .add-task-form {
    grid-template-columns: 1fr;
  }

  /* Buttons full width */
  .button {
    width: 100%;
  }

  /* Make badges wrap more comfortably */
  .task-meta {
    gap: 6px;
  }

  /* Reduce outer padding a bit */
  .page { padding: 16px; }
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}