:root {
  --bg: #f4f1f1;
  --panel: #ffffff;
  --panel-muted: #faf8f8;
  --text: #141b2d;
  --muted: #74809a;
  --accent: #c61f3a;
  --accent-dark: #20243a;
  --danger: #c2373c;
  --line: rgba(104, 118, 146, 0.16);
  --line-strong: rgba(104, 118, 146, 0.26);
  --shadow: 0 14px 28px rgba(24, 33, 56, 0.08);
  --font-display: "Segoe UI", "Arial", sans-serif;
  --font-body: "Segoe UI", "Arial", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg);
}

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

button {
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 10px 18px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 20;
}

.topbar__brand,
.topbar__actions,
.topbar__utility,
.topbar__exports,
.workspace-controls,
.week-controls,
.list-card__actions,
.suggestions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 4px;
  background: var(--accent);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.topbar__brand-copy {
  display: grid;
  gap: 2px;
}

.topbar__brand-copy strong {
  font-size: 1.65rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  text-transform: uppercase;
}

.topbar__brand-copy span {
  color: var(--muted);
  font-size: 0.78rem;
}

.topbar__actions {
  justify-content: flex-end;
}

.topbar__field,
.panel-form label,
.modal-form label,
.week-field {
  display: grid;
  gap: 6px;
}

.topbar__field {
  min-width: 260px;
}

.topbar__field span,
.panel-form label span,
.modal-form label span,
.week-field span,
.eyebrow {
  margin: 0;
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.topbar__field input,
.week-field input,
.panel-form input,
.panel-form select,
.panel-form textarea,
.modal-form input,
.modal-form select,
.modal-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--panel-muted);
  padding: 11px 12px;
  color: var(--text);
}

.week-field {
  min-width: 170px;
  padding: 8px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  background: var(--panel);
}

.week-field input {
  border: 0;
  padding: 0;
  background: transparent;
  font-weight: 700;
}

.week-field small {
  color: var(--muted);
  font-size: 0.78rem;
}

.toolbar-button,
.tab-button,
.day-selector button,
.primary-button,
.suggestion-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--line-strong);
  background: var(--panel);
  color: var(--text);
  border-radius: 4px;
  font-size: 0.84rem;
  font-weight: 800;
  transition:
    background 140ms ease,
    border-color 140ms ease,
    transform 140ms ease;
}

.toolbar-button:hover,
.tab-button:hover,
.day-selector button:hover,
.primary-button:hover,
.suggestion-chip:hover {
  transform: translateY(-1px);
}

.toolbar-button--ghost {
  background: var(--panel-muted);
}

.toolbar-button--icon {
  width: 40px;
  padding: 0;
  font-size: 1rem;
}

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

.primary-button,
.sidebar-button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.notice-bar {
  width: 100%;
  padding: 9px 18px;
  background: #fff1f4;
  border-top: 1px solid var(--line);
  color: var(--accent);
  font-size: 0.84rem;
  font-weight: 700;
}

.workspace-shell {
  display: grid;
  grid-template-columns: 208px minmax(0, 1fr);
  min-height: calc(100vh - 67px);
}

.sidebar {
  background: var(--panel);
  border-right: 1px solid var(--line);
  padding: 14px 10px;
}

.sidebar-nav {
  display: grid;
  gap: 6px;
}

.sidebar-button {
  width: 100%;
  justify-content: flex-start;
  border: 0;
  background: transparent;
  color: var(--accent-dark);
  padding-inline: 10px;
}

.sidebar-button__icon {
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  background: rgba(32, 36, 58, 0.08);
  font-size: 0.67rem;
  font-weight: 900;
}

.sidebar-button.active .sidebar-button__icon {
  background: rgba(255, 255, 255, 0.16);
}

.main-content {
  min-width: 0;
  padding: 18px;
}

.planner-page,
.list-page {
  display: grid;
  gap: 16px;
}

.workspace-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.workspace-title h1,
.list-card h3,
.panel-header h3,
.modal-header h2,
.empty-panel h3 {
  margin: 0;
  font-family: var(--font-display);
}

.workspace-title h1 {
  font-size: 2.3rem;
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -0.05em;
  text-transform: uppercase;
}

.muted-text {
  margin: 8px 0 0;
  color: var(--muted);
}

.workspace-controls {
  justify-content: flex-end;
}

.segmented-control {
  display: flex;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  background: #f0ecec;
}

.segmented-control button {
  min-height: 34px;
  padding: 0 12px;
  border: 0;
  border-radius: 4px;
  background: transparent;
  color: var(--muted);
  font-weight: 800;
}

.segmented-control .active {
  background: var(--panel);
  color: var(--text);
  box-shadow: inset 0 0 0 1px var(--line-strong);
}

.day-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.day-selector button {
  display: grid;
  justify-items: start;
  gap: 4px;
  min-width: 98px;
  padding: 10px 12px;
}

.day-selector button strong {
  font-size: 0.82rem;
}

.day-selector button small {
  font-size: 0.72rem;
  color: inherit;
}

.day-selector .active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.planner-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 16px;
  align-items: start;
}

.planner-board {
  background: var(--panel);
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  overflow: hidden;
}

.planner-grid {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  grid-template-rows: auto minmax(0, 1fr);
}

.planner-days-header,
.planner-days {
  display: grid;
  grid-template-columns: repeat(var(--day-count), minmax(0, 1fr));
}

.planner-time-header,
.planner-day-header {
  background: #fbf9f9;
  padding: 12px 10px;
  border-bottom: 1px solid var(--line-strong);
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.68rem;
  font-weight: 800;
  color: var(--muted);
}

.planner-time-header {
  border-right: 1px solid var(--line-strong);
}

.planner-day-header {
  display: grid;
  gap: 3px;
  border-right: 1px solid var(--line);
}

.planner-day-header:last-child {
  border-right: 0;
}

.planner-day-header strong {
  font-size: 0.72rem;
  color: var(--accent-dark);
}

.planner-day-header small {
  font-size: 0.66rem;
}

.planner-day-header.is-active strong,
.planner-day-header.is-active small {
  color: var(--accent);
}

.planner-time-column {
  background: var(--panel);
  border-right: 1px solid var(--line-strong);
}

.time-slot,
.slot-button {
  height: 28px;
  border-bottom: 1px solid var(--line);
}

.time-slot {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 6px;
  color: #9aa7c0;
  font-size: 0.62rem;
  font-weight: 800;
}

.slot-button {
  width: 100%;
  display: block;
  border: 0;
  border-right: 1px solid var(--line);
  background: transparent;
}

.slot-button:hover {
  background: rgba(198, 31, 58, 0.05);
}

.hour-mark {
  border-bottom-color: var(--line-strong);
}

.planner-day-column {
  position: relative;
  min-height: calc(28px * 44);
  background: rgba(255, 255, 255, 0.72);
}

.slot-stack,
.event-layer {
  position: absolute;
  inset: 0;
}

.event-layer {
  pointer-events: none;
}

.event-card {
  position: absolute;
  border-radius: 4px;
  color: #fff;
  border-left: 4px solid rgba(17, 20, 33, 0.34);
  box-shadow: 0 10px 18px rgba(20, 27, 45, 0.14);
  overflow: hidden;
  pointer-events: auto;
}

.event-card.preview {
  opacity: 0.84;
}

.event-card.selected {
  outline: 2px solid rgba(198, 31, 58, 0.45);
}

.event-card__body {
  height: 100%;
  padding: 10px 10px 8px;
  display: grid;
  align-content: start;
  gap: 3px;
}

.event-card__body strong {
  font-size: 0.72rem;
  font-weight: 900;
  line-height: 1.12;
  text-transform: uppercase;
}

.event-card__body span,
.event-card__body small {
  font-size: 0.68rem;
  line-height: 1.15;
}

.event-resize-handle {
  position: absolute;
  left: 8px;
  right: 8px;
  height: 6px;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.66);
}

.event-resize-handle.top {
  top: 4px;
}

.event-resize-handle.bottom {
  bottom: 4px;
}

.details-panel {
  position: sticky;
  top: 82px;
  padding: 14px;
  background: #f8f5f5;
  border: 1px solid var(--line);
  border-radius: 4px;
}

.empty-panel,
.panel-form {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 16px;
  box-shadow: var(--shadow);
}

.empty-panel {
  display: grid;
  gap: 10px;
}

.empty-panel p {
  margin: 0;
}

.panel-form,
.modal-form {
  display: grid;
  gap: 14px;
}

.panel-header,
.modal-header,
.list-card__header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: start;
}

.panel-header--detail {
  align-items: center;
}

.panel-chip {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 10px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 800;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.color-field input[type="color"] {
  min-height: 46px;
  padding: 4px;
}

.detail-actions {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 10px;
}

.form-error {
  margin: 0;
  min-height: 1rem;
  color: var(--danger);
  font-size: 0.82rem;
}

.list-cards {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.list-card {
  background: var(--panel);
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  padding: 18px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 14px;
}

.list-card h3 {
  font-size: 1.15rem;
}

.list-card p {
  margin: 0;
}

.list-card__actions {
  justify-content: flex-end;
}

.list-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 0.84rem;
}

.swatch {
  width: 12px;
  height: 12px;
  border-radius: 999px;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(21, 26, 42, 0.42);
  z-index: 30;
}

.modal-card {
  width: min(620px, 100%);
  max-height: calc(100vh - 48px);
  overflow: auto;
  background: var(--panel);
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  padding: 20px;
  box-shadow: 0 24px 42px rgba(12, 18, 33, 0.2);
}

.suggestion-chip small {
  color: inherit;
  opacity: 0.74;
}

@media (max-width: 1200px) {
  .workspace-shell {
    grid-template-columns: 1fr;
  }

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

  .sidebar-nav {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  }

  .planner-layout {
    grid-template-columns: 1fr;
  }

  .details-panel {
    position: static;
  }
}

@media (max-width: 840px) {
  .topbar {
    align-items: start;
  }

  .topbar__actions {
    width: 100%;
    justify-content: flex-start;
  }

  .topbar__field {
    width: 100%;
  }

  .workspace-header {
    align-items: start;
    flex-direction: column;
  }

  .workspace-controls {
    justify-content: flex-start;
  }

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

  .detail-actions,
  .form-row {
    grid-template-columns: 1fr;
  }
}