:root {
  color-scheme: light;
  --bg: #f4f6f2;
  --ink: #171b18;
  --muted: #657069;
  --line: #d6ddd5;
  --panel: #ffffff;
  --brand: #c91525;
  --brand-dark: #8f0f1b;
  --green: #1f6d59;
  --gold: #d9ab27;
  --shadow: 0 18px 45px rgba(31, 36, 32, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--ink);
}

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

button {
  min-height: 42px;
  border: 0;
  border-radius: 8px;
  padding: 10px 14px;
  background: var(--brand);
  color: #fff;
  font-weight: 800;
  cursor: pointer;
}

button:hover,
button:focus-visible {
  background: var(--brand-dark);
}

button.secondary {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
}

button.secondary:hover,
button.secondary:focus-visible {
  border-color: var(--brand);
  color: var(--brand-dark);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

main {
  width: min(1360px, calc(100% - 28px));
  margin: 0 auto;
  padding: 28px 0 44px;
}

.masthead {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: end;
  padding: 36px 0 24px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--brand);
  font-size: 0.82rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 12px;
  font-size: clamp(2.2rem, 6vw, 5rem);
  line-height: 0.96;
}

h2 {
  margin-bottom: 8px;
  font-size: 1rem;
}

.lede {
  max-width: 680px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.5;
}

.stat-strip {
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: 10px;
}

.stat-strip span {
  min-width: 116px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  background: #fff;
  color: var(--muted);
}

.stat-strip strong {
  display: block;
  color: var(--ink);
  font-size: 1.3rem;
}

.workspace {
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

.panel,
.calendar-area {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.controls {
  position: sticky;
  top: 18px;
  display: grid;
  gap: 16px;
  padding: 18px;
}

.controls p {
  color: var(--muted);
  line-height: 1.45;
}

.file-drop {
  display: grid;
  gap: 6px;
  border: 2px dashed #c7d2ca;
  border-radius: 8px;
  padding: 18px;
  background: #f8faf7;
  color: var(--ink);
  cursor: pointer;
}

.file-drop span {
  font-weight: 900;
}

.file-drop small,
.status {
  color: var(--muted);
}

.file-drop input {
  display: none;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 800;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  background: #fff;
  color: var(--ink);
}

textarea {
  resize: vertical;
}

.button-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.divider {
  height: 1px;
  background: var(--line);
}

.calendar-area {
  min-height: 680px;
  padding: 18px;
}

.toolbar {
  display: grid;
  grid-template-columns: minmax(180px, 420px) auto;
  gap: 16px;
  align-items: end;
  justify-content: space-between;
}

.select-all {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 42px;
  color: var(--ink);
}

.select-all input,
.event-select input {
  width: auto;
}

.month-tabs {
  display: flex;
  gap: 8px;
  margin: 18px 0;
  overflow-x: auto;
  padding-bottom: 4px;
}

.month-tab {
  flex: 0 0 auto;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
}

.month-tab.active {
  border-color: var(--brand);
  background: var(--brand);
  color: #fff;
}

.event-list {
  display: grid;
  gap: 12px;
}

.empty-state {
  display: grid;
  place-items: center;
  min-height: 390px;
  border: 1px dashed var(--line);
  border-radius: 8px;
  color: var(--muted);
  text-align: center;
}

.event-card {
  display: grid;
  grid-template-columns: auto 78px minmax(0, 1fr) 118px;
  gap: 14px;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: #fff;
}

.event-select {
  min-height: 74px;
  align-items: center;
}

.date-box {
  display: grid;
  place-items: center;
  min-height: 74px;
  border-radius: 8px;
  background: #f2f5f1;
  color: var(--brand);
  text-align: center;
}

.date-box span {
  font-size: 0.75rem;
  font-weight: 900;
  text-transform: uppercase;
}

.date-box strong {
  font-size: 2rem;
  line-height: 1;
}

.event-fields {
  display: grid;
  gap: 10px;
}

.title-input {
  font-weight: 900;
}

.field-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 10px;
}

.event-actions {
  display: grid;
  gap: 10px;
}

.sync-state {
  min-height: 22px;
  color: var(--green);
  font-size: 0.82rem;
  font-weight: 900;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

@media (max-width: 980px) {
  .masthead,
  .workspace,
  .toolbar {
    grid-template-columns: 1fr;
  }

  .controls {
    position: static;
  }

  .stat-strip {
    grid-template-columns: 1fr;
  }

  .event-card {
    grid-template-columns: auto 70px minmax(0, 1fr);
  }

  .event-actions {
    grid-column: 3;
  }
}

@media (max-width: 640px) {
  main {
    width: min(100% - 18px, 1360px);
    padding-top: 14px;
  }

  .button-row,
  .field-grid {
    grid-template-columns: 1fr;
  }

  .event-card {
    grid-template-columns: auto minmax(58px, 64px) minmax(0, 1fr);
    gap: 10px;
    padding: 10px;
  }

  .date-box {
    min-height: 64px;
  }

  .event-actions {
    grid-column: 1 / -1;
  }
}