:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --surface-soft: #fafafa;
  --text-primary: #1d1d1f;
  --text-secondary: #6e6e73;
  --border: #e5e5ea;
  --shadow-soft: 0 10px 30px rgba(17, 17, 17, 0.06);
  --shadow-input: 0 6px 18px rgba(17, 17, 17, 0.05);
  --radius: 12px;
  --gap: 24px;
}

* {
  box-sizing: border-box;
}

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

body {
  min-height: 100vh;
  padding: 24px;
  background: linear-gradient(180deg, #ffffff 0%, var(--bg) 100%);
  color: var(--text-primary);
  font-family: "SF Pro Text", "SF Pro Display", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

[hidden] {
  display: none !important;
}

.auth-view {
  min-height: calc(100vh - 48px);
  display: grid;
  place-items: center;
}

.auth-card {
  width: min(100%, 380px);
  display: grid;
  gap: 14px;
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.auth-card h1 {
  margin: 0;
  font-size: 26px;
  font-weight: 700;
}

.auth-card p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 14px;
}

.auth-card label {
  display: grid;
  gap: 6px;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
}

.auth-card input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 13px;
  color: var(--text-primary);
  font: inherit;
  outline: none;
}

.auth-card input:focus {
  border-color: #c8d8ff;
  box-shadow: 0 0 0 4px rgba(10, 132, 255, 0.12);
}

.auth-error {
  min-height: 18px;
  color: #b42318 !important;
}

.auth-submit,
.logout-btn {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #1d1d1f;
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.auth-submit {
  padding: 12px 14px;
}

.app-shell {
  display: flex;
  gap: var(--gap);
  max-width: 1200px;
  min-height: calc(100vh - 48px);
  margin: 0 auto;
}

.sidebar,
.main {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

.sidebar {
  flex: 0 0 30%;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.main {
  flex: 1 1 70%;
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.week-nav {
  display: inline-flex;
  gap: 8px;
}

.icon-btn,
.today-btn,
.logout-btn {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-soft);
  color: var(--text-primary);
  font: inherit;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.icon-btn {
  width: 36px;
  height: 36px;
  font-size: 20px;
  line-height: 1;
}

.today-btn {
  padding: 9px 14px;
  font-size: 14px;
  font-weight: 500;
}

.logout-btn {
  padding: 9px 14px;
  font-size: 14px;
  color: #fff;
  background: #1d1d1f;
}

.icon-btn:hover,
.today-btn:hover {
  background: #f1f1f4;
}

.logout-btn:hover {
  background: #2c2c2e;
}

.icon-btn:active,
.today-btn:active,
.logout-btn:active {
  transform: scale(0.98);
}

.week-overview {
  display: grid;
  gap: 10px;
}

.day-chip {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  background: var(--surface-soft);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  transition: border-color 0.18s ease, background-color 0.18s ease, box-shadow 0.18s ease;
}

.day-chip .weekday {
  color: var(--text-secondary);
  font-size: 13px;
}

.day-chip .date {
  font-size: 16px;
  font-weight: 600;
}

.day-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}

.day-indicator {
  min-width: 18px;
  height: 18px;
  border-radius: 999px;
  background: #0a84ff;
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  line-height: 18px;
  text-align: center;
  padding: 0 5px;
}

.day-chip.active {
  border-color: #d0d0d7;
  background: #f1f5ff;
}

.day-chip.is-drop-target {
  border-color: #0a84ff;
  background: #e9f3ff;
  box-shadow: 0 0 0 3px rgba(10, 132, 255, 0.12);
}

.day-header h1 {
  margin: 0;
  font-size: clamp(28px, 3vw, 42px);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.day-content {
  flex: 1;
  border-radius: var(--radius);
  background: linear-gradient(180deg, #ffffff 0%, #fbfbfb 100%);
  border: 1px dashed #e9e9ee;
  padding: 14px;
  overflow: auto;
  transition: opacity 0.24s ease, transform 0.24s ease;
}

.day-content.is-day-switching {
  animation: day-content-fade 0.24s ease;
}

.carryover {
  margin-bottom: 12px;
  border: 1px solid #ffd6d3;
  background: #fff5f5;
  border-radius: 12px;
  padding: 12px;
}

.carryover-title {
  margin: 0 0 8px;
  font-size: 14px;
  font-weight: 700;
  color: #b42318;
}

.carryover-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.carryover-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid #ffdede;
  background: #fffafb;
}

.carryover-text {
  margin: 0;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 14px;
}

.carryover-origin {
  font-size: 12px;
  color: #8f5a5a;
  white-space: nowrap;
}

.carryover-controls {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.carryover-date {
  border: 1px solid #ffd0cc;
  background: #fff;
  color: var(--text-primary);
  border-radius: 9px;
  padding: 6px 8px;
  font: inherit;
  font-size: 12px;
}

.carryover-date.is-invalid {
  border-color: #ff453a;
  box-shadow: 0 0 0 3px rgba(255, 69, 58, 0.12);
}

.carryover-confirm {
  border: 1px solid #ffc9c5;
  background: #ffe7e5;
  color: #912018;
  border-radius: 9px;
  padding: 7px 10px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
}

.carryover-today {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text-primary);
  border-radius: 9px;
  padding: 7px 10px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
}

.task-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.task-empty-state {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, #ffffff 0%, #f8f9fb 100%);
  animation: item-fade-in 0.24s ease both;
}

.task-empty-state.with-carryovers {
  min-height: 180px;
}

.task-empty-title {
  margin: 0;
  font-size: 20px;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.task-empty-hint {
  margin: 8px 0 0;
  color: var(--text-secondary);
  font-size: 14px;
}

.task-empty {
  margin: 0;
  padding: 14px;
  color: var(--text-secondary);
  text-align: center;
  border-radius: 10px;
  background: #f7f7f9;
  border: 1px solid var(--border);
}

.task-row {
  display: grid;
  grid-template-columns: auto auto minmax(0, 1fr) auto auto auto;
  gap: 10px;
  align-items: center;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #fff;
  position: relative;
  animation: item-fade-in 0.24s ease both;
  animation-delay: calc(var(--item-index, 0) * 28ms);
}

.task-row[data-status='completed'] {
  background: #f7f7f8;
}

.task-row[draggable='true'],
.carryover-row[draggable='true'] {
  cursor: grab;
}

.task-row.is-dragging,
.carryover-row.is-dragging {
  opacity: 0.55;
  cursor: grabbing;
}

.carryover-row {
  animation: item-fade-in 0.24s ease both;
  animation-delay: calc(var(--item-index, 0) * 24ms);
}

.priority-badge {
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 6px 8px;
  font-size: 11px;
  font-weight: 600;
  min-width: 62px;
  text-align: center;
  cursor: pointer;
  transition: transform 0.15s ease, filter 0.2s ease;
}

.priority-badge:active {
  transform: scale(0.97);
}

.priority-1 {
  background: #e5e5ea;
  color: #3a3a3c;
}

.priority-2 {
  background: #ffd60a;
  color: #4b3900;
}

.priority-3 {
  background: #ff453a;
  color: #ffffff;
}

.task-row input[type='checkbox'] {
  width: 18px;
  height: 18px;
  margin: 0;
}

.task-text-wrap {
  min-width: 0;
}

.task-text {
  border: 0;
  background: transparent;
  padding: 0;
  margin: 0;
  font: inherit;
  font-size: 15px;
  color: var(--text-primary);
  text-align: left;
  width: 100%;
  cursor: text;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.task-text.is-completed {
  color: #8e8e93;
  text-decoration: line-through;
}

.task-text.is-postponed {
  color: #6e6e73;
}

.task-edit-input {
  width: 100%;
  border: 1px solid #c8d8ff;
  border-radius: 8px;
  padding: 7px 8px;
  font: inherit;
  font-size: 15px;
  outline: none;
}

.task-postpone,
.task-calendar,
.task-delete {
  border: 1px solid var(--border);
  border-radius: 9px;
  background: #f6f6f8;
  color: var(--text-primary);
  font: inherit;
  font-size: 12px;
  padding: 7px 10px;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.task-postpone.is-active {
  background: #eaf0ff;
  border-color: #c8d8ff;
}

.task-postpone:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.task-delete {
  min-width: 42px;
}

.task-calendar {
  min-width: 42px;
}

.task-date-picker {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
  border: 0;
  padding: 0;
}

.quick-input-wrap {
  padding-top: 6px;
}

.quick-input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
  padding: 14px 16px;
  font: inherit;
  font-size: 15px;
  box-shadow: var(--shadow-input);
  outline: none;
}

.quick-input:focus {
  border-color: #c8d8ff;
  box-shadow: 0 0 0 4px rgba(10, 132, 255, 0.12);
}

@keyframes item-fade-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes day-content-fade {
  from {
    opacity: 0.6;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 900px) {
  body {
    padding: 16px;
  }

  .app-shell {
    min-height: calc(100vh - 32px);
  }

  .sidebar {
    flex-basis: 35%;
  }

  .main {
    padding: 24px;
  }
}

@media (max-width: 720px) {
  .app-shell {
    flex-direction: column;
    min-height: auto;
  }

  .sidebar,
  .main {
    width: 100%;
  }

  .sidebar {
    padding: 12px;
    gap: 12px;
  }

  .week-overview {
    display: flex;
    overflow-x: auto;
    gap: 8px;
    padding-bottom: 4px;
    scrollbar-width: none;
  }

  .week-overview::-webkit-scrollbar {
    display: none;
  }

  .day-chip {
    min-width: 88px;
    flex-direction: column;
    gap: 2px;
    align-items: flex-start;
    padding: 10px 12px;
  }

  .day-chip .weekday {
    font-size: 12px;
  }

  .day-chip .date {
    font-size: 14px;
  }

  .day-meta {
    align-items: flex-start;
  }

  .main {
    padding: 20px;
  }

  .carryover-row {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .carryover-controls {
    flex-wrap: wrap;
  }

}