:root {
  color-scheme: light dark;
  --ink: #14201b;
  --muted: #65736c;
  --line: #d8e2dc;
  --paper: #f6f8f5;
  --panel: rgba(255, 255, 255, .88);
  --panel-solid: #ffffff;
  --soft: #eef5f1;
  --green: #23745b;
  --green-strong: #145640;
  --done: #0f7d5b;
  --danger: #c9402c;
  --blue: #3f6fa8;
  --shadow: 0 18px 48px rgba(25, 45, 36, .11);
  --radius: 8px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #eef6f1;
    --muted: #a8b8b0;
    --line: #2b3c34;
    --paper: #101713;
    --panel: rgba(23, 32, 27, .9);
    --panel-solid: #17201b;
    --soft: #1d2b24;
    --green: #44b58d;
    --green-strong: #77d5b2;
    --done: #58d6a8;
    --danger: #ff7d68;
    --blue: #8fb9ef;
    --shadow: 0 18px 52px rgba(0, 0, 0, .28);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 90% 0%, rgba(63, 111, 168, .1), transparent 32%),
    linear-gradient(135deg, rgba(35, 116, 91, .08), transparent 44%),
    var(--paper);
  color: var(--ink);
}

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

button {
  border: 0;
  cursor: pointer;
}

.app {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
}

.sidebar {
  padding: 22px 18px;
  border-right: 1px solid var(--line);
  background: var(--panel);
  backdrop-filter: blur(14px);
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 4px;
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  border-radius: var(--radius);
}

.brand:hover {
  color: var(--green-strong);
}

.mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  background: var(--ink);
  color: var(--paper);
}

.brand h1 {
  font-size: 18px;
  margin: 0;
  line-height: 1.05;
  letter-spacing: 0;
}

.brand span,
.auth-head span,
.panel-head span,
.subtle {
  display: block;
  color: var(--muted);
  font-size: 12px;
  margin-top: 4px;
}

.auth-card,
.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.auth-card {
  padding: 14px;
}

.auth-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}

.auth-head strong {
  display: block;
  font-size: 14px;
}

.auth-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--soft);
  margin-bottom: 10px;
}

.auth-tab {
  min-height: 34px;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
}

.auth-tab.active {
  color: var(--ink);
  background: var(--panel-solid);
  font-weight: 750;
}

.auth-form,
.verify-form {
  display: none;
  gap: 8px;
}

.auth-form.active,
.verify-form.active {
  display: grid;
}

.result-box {
  display: none;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px;
  color: var(--muted);
  background: var(--soft);
  font-size: 13px;
  line-height: 1.45;
}

.result-box.active {
  display: block;
}

.account-card {
  display: none;
}

.account-card.active {
  display: block;
}

.switch-row {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--muted);
  font-size: 13px;
}

.switch-row input {
  width: 18px;
  height: 18px;
}

input,
textarea,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-solid);
  color: var(--ink);
  padding: 12px 13px;
  outline: none;
  min-width: 0;
}

select {
  appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--muted) 50%),
    linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position:
    calc(100% - 17px) 50%,
    calc(100% - 12px) 50%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 34px;
}

textarea {
  resize: vertical;
  line-height: 1.5;
}

input:focus,
textarea:focus,
select:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--green) 18%, transparent);
}

.icon-btn,
.plain-btn,
.tab,
.action-btn {
  min-height: 42px;
  border-radius: var(--radius);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--ink);
  background: var(--panel-solid);
  border: 1px solid var(--line);
}

.icon-btn {
  width: 42px;
  flex: 0 0 42px;
}

.action-btn {
  width: 100%;
  font-weight: 750;
}

.primary {
  background: var(--green);
  color: #ffffff;
  border-color: var(--green);
}

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

.tab {
  justify-content: flex-start;
  padding: 0 12px;
  font-weight: 700;
}

.tab.active {
  background: color-mix(in srgb, var(--green) 15%, var(--panel-solid));
  border-color: color-mix(in srgb, var(--green) 42%, var(--line));
  color: var(--green-strong);
}

.stat-strip {
  margin-top: auto;
  display: grid;
  gap: 10px;
  color: var(--muted);
  font-size: 13px;
}

.stat {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  border-top: 1px solid var(--line);
  padding-top: 10px;
}

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

.topbar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 22px;
}

.topbar h2 {
  margin: 0;
  font-size: clamp(28px, 3vw, 42px);
  line-height: 1.05;
  letter-spacing: 0;
}

.date-line {
  color: var(--muted);
  margin-top: 8px;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.top-actions #datePicker {
  width: 190px;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(420px, 1fr) minmax(320px, 420px);
  gap: 18px;
  align-items: start;
}

.side-stack {
  display: grid;
  gap: 18px;
}

.panel-head {
  padding: 16px;
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.panel-head h3 {
  margin: 0;
  font-size: 17px;
  letter-spacing: 0;
}

.panel-body {
  padding: 16px;
}

.focus-panel .panel-body {
  padding: 18px;
}

.task-form {
  display: grid;
  gap: 10px;
}

.task-title-input {
  font-size: 18px;
  min-height: 52px;
}

.task-details {
  display: grid;
  grid-template-columns: 104px 132px minmax(0, 1fr) 46px;
  gap: 8px;
}

.priority-select {
  font-weight: 800;
  color: var(--blue);
  background-color: var(--soft);
  border-color: color-mix(in srgb, var(--blue) 28%, var(--line));
}

.inline-check {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--muted);
  font-size: 13px;
}

.inline-check input {
  width: 18px;
  height: 18px;
}

#taskNote {
  min-height: 116px;
}

.tasks {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.long-section {
  border-top: 1px solid var(--line);
  margin-top: 20px;
  padding-top: 18px;
}

.section-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.section-title h4 {
  margin: 0;
  font-size: 15px;
}

.section-title span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.long-task {
  border-left: 5px solid var(--blue);
}

.tasks.drop-target {
  outline: 2px dashed color-mix(in srgb, var(--green) 60%, transparent);
  outline-offset: 4px;
  border-radius: var(--radius);
}

.task {
  border: 1px solid var(--line);
  background: var(--panel-solid);
  border-radius: var(--radius);
  padding: 13px;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: start;
  cursor: grab;
  touch-action: pan-y;
  transition: border-color .16s ease, box-shadow .16s ease, opacity .16s ease, transform .16s ease;
}

.task:active {
  cursor: grabbing;
}

.task.dragging {
  opacity: .54;
  border-color: var(--green);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--green) 18%, transparent);
  pointer-events: none;
}

.task.drag-chosen {
  border-color: var(--green);
}

body.task-dragging {
  user-select: none;
}

.task button,
.task a,
.task input,
.task textarea,
.task select,
.task label {
  cursor: auto;
}

.task.done {
  border-color: color-mix(in srgb, var(--done) 55%, var(--line));
  background: color-mix(in srgb, var(--done) 13%, var(--panel-solid));
  box-shadow: inset 5px 0 0 var(--done);
}

.check {
  width: 30px;
  height: 30px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--panel-solid);
  display: grid;
  place-items: center;
  color: transparent;
  margin-top: 1px;
}

.task.done .check {
  background: var(--done);
  border-color: var(--done);
  color: #ffffff;
}

.task-title {
  font-weight: 800;
  word-break: break-word;
}

.task.done .task-title {
  text-decoration: line-through;
  text-decoration-thickness: 2px;
}

.done-label {
  display: none;
  color: var(--done);
  font-size: 12px;
  font-weight: 800;
  margin-top: 5px;
}

.task.done .done-label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.task-meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  min-height: 25px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0 9px;
  background: var(--soft);
  color: inherit;
  text-decoration: none;
  max-width: 100%;
}

.priority {
  font-weight: 800;
}

.priority-toggle {
  cursor: pointer;
  font-size: 13px;
}

.priority-toggle:hover {
  filter: brightness(1.08);
  border-color: currentColor;
}

.priority-low {
  color: var(--muted);
}

.priority-normal {
  color: var(--blue);
}

.priority-high {
  color: #b26b00;
  border-color: color-mix(in srgb, #d49321 50%, var(--line));
  background: color-mix(in srgb, #d49321 14%, var(--panel-solid));
}

.priority-urgent {
  color: var(--danger);
  border-color: color-mix(in srgb, var(--danger) 55%, var(--line));
  background: color-mix(in srgb, var(--danger) 12%, var(--panel-solid));
}

.task-note {
  margin-top: 9px;
  color: var(--muted);
  line-height: 1.45;
  white-space: pre-wrap;
  word-break: break-word;
}

.delete-task {
  color: var(--danger);
}

.task-actions {
  display: grid;
  grid-template-columns: repeat(2, 36px);
  gap: 6px;
}

.task-actions .icon-btn {
  width: 36px;
  min-height: 36px;
  flex-basis: 36px;
}

.task-actions .icon-btn:disabled {
  opacity: .38;
  cursor: not-allowed;
}

.task-edit-form {
  display: none;
  grid-column: 1 / -1;
  gap: 10px;
  border-top: 1px solid var(--line);
  margin-top: 4px;
  padding-top: 12px;
}

.task.editing .task-edit-form {
  display: grid;
}

.task.editing > .check,
.task.editing > div:not(.task-actions):not(.task-edit-form),
.task.editing > .task-actions {
  opacity: .45;
}

.edit-grid {
  display: grid;
  grid-template-columns: 110px 130px minmax(0, 1fr);
  gap: 8px;
}

.edit-note {
  min-height: 86px;
}

.edit-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  flex-wrap: wrap;
}

.empty {
  color: var(--muted);
  text-align: center;
  padding: 42px 12px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--panel-solid) 72%, transparent);
}

#dailyMemo {
  min-height: 340px;
}

.agenda-list {
  display: grid;
  gap: 8px;
}

.agenda-item {
  display: grid;
  gap: 5px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--blue);
  border-radius: var(--radius);
  padding: 10px 11px;
  background: var(--panel-solid);
}

.agenda-item.done {
  border-left-color: var(--done);
  background: color-mix(in srgb, var(--done) 12%, var(--panel-solid));
}

.agenda-date,
.agenda-time {
  color: var(--muted);
  font-size: 12px;
}

.calendar-view,
.today-view {
  display: none;
}

.calendar-view.active,
.today-view.active {
  display: block;
}

.announcements {
  display: grid;
  gap: 10px;
  margin-bottom: 18px;
}

.announcement {
  border: 1px solid color-mix(in srgb, var(--blue) 38%, var(--line));
  border-left: 4px solid var(--blue);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--blue) 8%, var(--panel-solid));
  padding: 12px 14px;
}

.announcement strong {
  display: block;
  margin-bottom: 4px;
}

.announcement p {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
}

.calendar-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  align-items: start;
  min-width: 0;
}

.calendar-layout > * {
  min-width: 0;
}

.calendar-panel .panel-body {
  overflow-x: auto;
  scrollbar-gutter: stable;
}

.month-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.month-title {
  font-size: 22px;
  font-weight: 850;
}

.month-actions {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.calendar {
  display: grid;
  grid-template-columns: repeat(7, minmax(88px, 1fr));
  gap: 8px;
  min-width: 720px;
}

.weekday {
  color: var(--muted);
  font-size: 12px;
  padding: 0 8px 4px;
  font-weight: 750;
}

.day {
  aspect-ratio: 1 / 1.08;
  min-height: 118px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-solid);
  padding: 9px;
  display: flex;
  flex-direction: column;
  gap: 7px;
  overflow: hidden;
  text-align: left;
  cursor: pointer;
  touch-action: pan-y;
  transition: border-color .16s ease, box-shadow .16s ease, transform .16s ease;
}

.day:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--green) 45%, transparent);
  outline-offset: 2px;
}

.day.muted {
  opacity: .45;
}

.day.today {
  border-color: var(--green);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--green) 18%, transparent);
}

.day.drop-target {
  border-color: var(--green-strong);
  box-shadow:
    inset 0 0 0 2px var(--green-strong),
    0 0 0 3px color-mix(in srgb, var(--green) 18%, transparent);
}

.day-num {
  font-weight: 850;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.count {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.mini-task {
  font-size: 12px;
  line-height: 1.25;
  color: var(--ink);
  background: var(--soft);
  border-left: 3px solid var(--blue);
  padding: 5px 6px;
  border-radius: 5px;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  cursor: grab;
  user-select: none;
  touch-action: none;
}

.mini-task:active {
  cursor: grabbing;
}

.mini-task.dragging {
  opacity: .62;
  outline: 2px solid var(--green);
  outline-offset: 2px;
  pointer-events: none;
}

body.calendar-dragging .day {
  cursor: copy;
}

.more-task {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  padding: 0 6px;
}

.mini-task.done {
  border-left-color: var(--done);
  text-decoration: line-through;
}

.toast {
  position: fixed;
  right: 22px;
  bottom: 22px;
  background: var(--ink);
  color: var(--paper);
  padding: 12px 14px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transform: translateY(20px);
  opacity: 0;
  pointer-events: none;
  transition: .2s ease;
  max-width: min(420px, calc(100vw - 32px));
  z-index: 20;
}

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

body.calendar-expanded .app {
  grid-template-columns: 1fr;
}

body.calendar-expanded .sidebar {
  display: none;
}

body.calendar-expanded .main {
  padding: 22px;
}

body.calendar-expanded .topbar {
  display: none;
}

body.calendar-expanded .calendar-layout {
  grid-template-columns: 1fr;
  overflow-x: visible;
}

body.calendar-expanded .calendar-layout > aside {
  display: none;
}

body.calendar-expanded .calendar {
  min-width: 0;
}

body.calendar-expanded .day {
  min-height: 148px;
}

body.calendar-expanded .month-title {
  font-size: 28px;
}

.admin-page {
  max-width: 1180px;
  margin: 0 auto;
  padding: 28px;
}

.admin-hero {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.admin-hero h1 {
  margin: 0;
  font-size: clamp(28px, 4vw, 44px);
  letter-spacing: 0;
}

.admin-hero p {
  margin: 8px 0 0;
  color: var(--muted);
}

.admin-grid {
  display: none;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 18px;
  align-items: start;
}

.admin-form {
  display: grid;
  gap: 10px;
}

.admin-login {
  max-width: 420px;
}

.admin-users,
.notice-list {
  display: grid;
  gap: 10px;
}

.admin-user,
.notice-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-solid);
  padding: 12px;
  display: grid;
  gap: 10px;
}

.admin-user span,
.admin-user small,
.notice-card small {
  display: block;
  color: var(--muted);
  margin-top: 4px;
}

.notice-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
  white-space: pre-wrap;
}

.admin-actions {
  display: grid;
  grid-template-columns: minmax(160px, 1fr) repeat(3, auto);
  gap: 8px;
  align-items: center;
}

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

@media (min-width: 1540px) {
  .calendar-layout {
    grid-template-columns: minmax(0, 1fr) clamp(300px, 22vw, 340px);
  }
}

@media (max-width: 1080px) {
  .workspace,
  .admin-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 860px) {
  .app {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

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

  .stat-strip {
    margin-top: 0;
  }
}

@media (max-width: 640px) {
  .main {
    padding: 18px 12px 26px;
  }

  .topbar {
    align-items: stretch;
    flex-direction: column;
  }

  .top-actions {
    justify-content: flex-start;
  }

  .top-actions #datePicker {
    width: min(100%, 210px);
  }

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

  .task-details .icon-btn {
    width: 100%;
  }

  .task {
    grid-template-columns: 34px minmax(0, 1fr);
  }

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

  .task-actions .icon-btn {
    width: 100%;
  }

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

  .edit-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  #dailyMemo {
    min-height: 240px;
  }

  .calendar {
    gap: 5px;
    grid-template-columns: repeat(7, minmax(78px, 1fr));
  }

  .weekday {
    padding: 0 2px 4px;
    text-align: center;
  }

  .day {
    min-height: 96px;
    padding: 6px;
  }

  .mini-task {
    font-size: 11px;
    line-height: 1.2;
    padding: 4px 5px;
    -webkit-line-clamp: 1;
  }

  .admin-page {
    padding: 18px 12px;
  }

  .admin-hero {
    align-items: stretch;
    flex-direction: column;
  }

  .admin-actions {
    grid-template-columns: 1fr;
  }
}