:root {
  color-scheme: light;
  font-family: "Inter", "Microsoft YaHei", "PingFang SC", sans-serif;
  color: #2d2431;
  background: #f6f3ef;
  --accent: #694572;
  --muted: #716575;
  --line: #eae3e9;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(ellipse at top, #eee4f2, transparent 42rem);
}

main {
  width: min(100% - 2rem, 42rem);
  margin-inline: auto;
  padding-block: clamp(2.5rem, 10vw, 6.5rem) 3rem;
}

.intro { margin-bottom: 2rem; }
.intro-bar { display: flex; align-items: center; justify-content: space-between; gap: .75rem; }
.header-actions { display: flex; align-items: flex-start; gap: .4rem; margin-left: auto; }
.header-stack { display: grid; gap: .4rem; }
.header-actions button { white-space: nowrap; }
.intro time { color: var(--accent); font-size: .9rem; font-weight: 700; }
.intro-date { display: grid; gap: .25rem; }
.intro-date small { color: var(--muted); font-size: .75rem; }
#welcome-user { display: block; margin-top: .85rem; color: var(--muted); font-size: .8rem; }
h1 { margin: .55rem 0 .75rem; font-size: clamp(2.6rem, 9vw, 4.25rem); letter-spacing: -.055em; }
.intro p, .empty p { margin: 0; color: var(--muted); }

.board {
  padding: clamp(1rem, 4vw, 1.75rem);
  border: 1px solid var(--line);
  border-radius: 1.5rem;
  background: #fffdfd;
  box-shadow: 0 1.25rem 3rem #3d20400c;
}

form { display: flex; gap: .65rem; }
button, input, select { font: inherit; }
button { cursor: pointer; }
button:focus-visible, input:focus-visible, select:focus-visible { outline: 3px solid #a279ad; outline-offset: 3px; }

#task-form, #task-editor-form { display: grid; gap: .85rem; }
.task-entry, .editor-actions { display: flex; gap: .65rem; }
.editor-actions { justify-content: flex-end; }
.task-fields { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); gap: .65rem; }
.task-fields label { display: grid; gap: .35rem; color: var(--muted); font-size: .875rem; }
.date-field { grid-column: 1 / -1; }
.task-fields input, .task-fields select {
  width: 100%;
  min-width: 0;
  min-height: 2.75rem;
  padding: .5rem;
  border: 1px solid var(--line);
  border-radius: .65rem;
  background: #faf7fa;
  color: #2d2431;
}

#task-input {
  flex: 1;
  min-width: 0;
  min-height: 3.25rem;
  border: 1px solid var(--line);
  border-radius: .8rem;
  background: #faf7fa;
  color: inherit;
  padding: .7rem .9rem;
}

#task-input::placeholder { color: var(--muted); }
.add {
  border: 0;
  border-radius: .8rem;
  padding: .7rem clamp(.65rem, 3vw, 1.1rem);
  background: var(--accent);
  color: white;
  font-weight: 700;
  white-space: nowrap;
}
.add:hover { background: #52345a; }

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin-top: 1.35rem;
  padding-bottom: .85rem;
  border-bottom: 1px solid var(--line);
}

.filters button, .remove {
  border: 0;
  border-radius: .6rem;
  padding: .65rem .8rem;
  background: transparent;
  color: var(--muted);
  font-size: .875rem;
}
.filters button:hover, .remove:hover { background: #f5eef6; }
.filters [aria-pressed="true"] { background: #eee3f1; color: #57325f; font-weight: 700; }

ul { list-style: none; margin: 0; padding: 0; }
.task {
  display: flex;
  align-items: center;
  gap: .55rem;
  min-height: 3.5rem;
  border-bottom: 1px solid var(--line);
}
.task:last-child { border-bottom: 0; }
.task label { flex: 1; min-width: 0; display: flex; align-items: center; gap: .85rem; padding-block: .6rem; cursor: pointer; }
.task input { width: 1.2rem; height: 1.2rem; flex: none; margin: 0; accent-color: var(--accent); cursor: pointer; }
.task span { overflow-wrap: anywhere; }
.task input:checked + span .task-title { text-decoration: line-through; color: var(--muted); }
.task-content { display: grid; gap: .35rem; min-width: 0; }
.task-meta { display: flex; flex-wrap: wrap; align-items: center; gap: .3rem .65rem; color: var(--muted); font-size: .8rem; }
.task-weight { padding: .15rem .4rem; border-radius: .4rem; background: #f1eaf2; color: #57325f; }
.task-folder { padding: .15rem .4rem; border-radius: .4rem; background: #f0ebdf; color: #5d4b28; }
.task-weight:is([data-weight="4"], [data-weight="5"]) { background: #eee0f2; font-weight: 700; }
.countdown { color: #57325f; font-weight: 700; }
.countdown.due-soon { color: #855000; }
.countdown.overdue { color: #8b3049; }
.task-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; }
#task-editor {
  width: min(28rem, calc(100% - 2rem));
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: #fffdfd;
  color: inherit;
}
#task-editor::backdrop { background: #2d243160; }
#task-editor-title { margin: 0; font-size: 1.2rem; }
#task-editor-name { overflow-wrap: anywhere; }
@media (max-width: 420px) {
  .task-fields { grid-template-columns: minmax(0, 1fr); }
  .task-actions { flex-direction: column; }
}
.remove { flex: none; }
.remove:hover { color: #8b3049; }
.notice { color: #8b3049; font-size: .9rem; }

#login-title { margin: 0 0 1.25rem; font-size: 1.2rem; }
#login-form, #password-form { display: grid; gap: 1rem; }
#login-form label, #password-form label { display: grid; gap: .4rem; color: var(--muted); }
#login-form input, #password-form input {
  width: 100%;
  min-height: 3rem;
  border: 1px solid var(--line);
  border-radius: .8rem;
  background: #faf7fa;
  padding: .7rem .9rem;
  color: #2d2431;
}
#logout { flex: none; border: 1px solid var(--line); background: #fffdfd; color: var(--accent); }
#logout:hover { background: #f5eef6; }
#task-workspace { display: grid; grid-template-columns: minmax(9rem, 1fr) minmax(0, 3fr); gap: 1rem; align-items: start; }
.folder-sidebar { padding: .9rem; }
.folder-sidebar h2 { margin: 0 0 .6rem; font-size: .9rem; color: var(--muted); }
#folder-list { display: grid; gap: .25rem; }
#folder-list button {
  width: 100%;
  border: 0;
  border-radius: .6rem;
  padding: .55rem .65rem;
  background: transparent;
  color: inherit;
  text-align: left;
  overflow-wrap: anywhere;
}
#folder-list button:hover { background: #f5eef6; }
#folder-list [aria-pressed="true"] { background: #eee3f1; color: #57325f; font-weight: 700; }
@media (max-width: 640px) {
  #task-workspace { grid-template-columns: minmax(0, 1fr); }
  #folder-list { display: flex; overflow-x: auto; }
  #folder-list li { flex: none; max-width: 14rem; }
}
#toggle-folder { border: 1px solid var(--line); background: #fffdfd; color: var(--accent); }
#toggle-folder:hover { background: #f5eef6; }
#folder-name {
  min-width: 0;
  max-width: 100%;
  min-height: 2.5rem;
  border: 1px solid var(--line);
  border-radius: .65rem;
  background: #faf7fa;
  color: inherit;
  padding: .45rem .6rem;
}
#folder-name { flex: 1; }
#task-form, #folder-form { margin-bottom: 1rem; }
#folder-form { margin-top: .65rem; }
#account-admin, #password-panel { margin-top: 1rem; }
#account-admin summary { cursor: pointer; font-weight: 700; }
#password-title { margin: 0; font-size: 1.2rem; }
#account-form, #account-result, #password-form { margin-top: 1rem; }
#account-form input, #account-result input {
  min-width: 0;
  min-height: 2.75rem;
  padding: .65rem .8rem;
  border: 1px solid var(--line);
  border-radius: .8rem;
  background: #faf7fa;
  color: inherit;
}
#account-form input { flex: 1; }
#account-result input { display: block; width: 100%; margin-top: .4rem; font-family: monospace; }
button:disabled, fieldset:disabled { cursor: wait; }

.empty { display: grid; place-items: center; gap: 1rem; padding: 3rem .5rem; text-align: center; }
.empty-icon {
  display: grid;
  place-items: center;
  width: 3rem;
  aspect-ratio: 1;
  border: 1px solid #e9dcec;
  border-radius: 1rem;
  background: #f5edf7;
  color: var(--accent);
  font-size: 1.25rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}