:root {
  --paper: #efefef;
  --ink: #111111;
  --line: #cfcfcf;
  --panel: #ffffff;
  --muted: #5a5a5a;
  --pop-yellow: #f2de9a;
  --pop-yellow-line: #d3b24d;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

.site-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 260px 1fr;
}

.left-rail {
  background: #f7f7f7;
  border-right: 1px solid var(--line);
  padding: 20px 14px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.logo-wrap {
  display: flex;
  justify-content: center;
}

.logo-dot {
  width: 136px;
  height: 136px;
  border-radius: 50%;
  border: 1px solid #ffffff;
  background: #000000;
  color: #ffffff;
  font-size: 20px;
  font-weight: 500;
  line-height: 0.95;
  display: grid;
  place-content: center;
  text-align: center;
  text-transform: uppercase;
  padding: 0 8px;
}

.back-link {
  color: var(--ink);
  text-decoration: none;
  border: 1px solid var(--line);
  background: #fff;
  padding: 8px 10px;
  font-size: 14px;
}

.back-link:hover {
  background: #f0f0f0;
}

.calendar-launch {
  border-top: 1px solid var(--line);
  padding-top: 10px;
}

.calendar-launch h3 {
  margin: 0 0 8px;
  font-size: 16px;
  text-transform: uppercase;
}

.calendar-launch p {
  margin: 0;
  font-size: 13px;
  line-height: 1.35;
  color: var(--muted);
}

.main-pane {
  padding: 14px 20px 24px;
}

.top-bar {
  background: var(--panel);
  border: 1px solid var(--line);
  min-height: 52px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 8px 12px;
}

h1 {
  margin: 0;
  font-size: clamp(28px, 3.8vw, 46px);
  font-weight: 500;
  letter-spacing: -0.01em;
  text-transform: uppercase;
}

.status {
  margin: 0 0 0 auto;
  font-size: 14px;
  color: var(--muted);
}

.status.error {
  color: #7a1f1f;
}

.calendar-panel {
  margin-top: 14px;
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 14px;
}

.month-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.month-controls h2 {
  margin: 0 10px 0 6px;
  font-size: clamp(24px, 3vw, 34px);
  text-transform: uppercase;
  font-weight: 500;
}

.month-controls button {
  border: 1px solid #2a2a2a;
  background: #efefef;
  color: var(--ink);
  font: inherit;
  cursor: pointer;
  padding: 7px 10px;
}

.month-controls button:hover {
  background: #ffffff;
}

.month-summary {
  margin: 8px 0 12px;
  font-size: 13px;
  color: var(--muted);
}

.weekday-row {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 8px;
}

.weekday-row span {
  font-size: 12px;
  text-transform: uppercase;
  color: #3f3f3f;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 8px;
}

.day-cell {
  border: 1px solid var(--line);
  min-height: 90px;
  background: #fafafa;
  text-align: left;
  padding: 8px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.day-cell:hover {
  background: #f0f0f0;
}

.day-cell.inactive {
  opacity: 0.35;
  cursor: default;
}

.day-cell.selected {
  border-color: var(--pop-yellow-line);
  background: var(--pop-yellow);
}

.day-cell.today {
  box-shadow: inset 0 0 0 1px #111111;
}

.day-number {
  font-size: 15px;
  font-weight: 600;
}

.day-pin {
  align-self: flex-start;
  border: 1px solid var(--pop-yellow-line);
  background: #fff6cf;
  border-radius: 3px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0 5px;
  font-weight: 700;
}

.day-count {
  margin-top: 10px;
  font-size: 12px;
  color: var(--muted);
}

.day-cell.has-events .day-count {
  color: #111111;
  font-weight: 600;
}

.day-details {
  margin-top: 14px;
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 12px 14px;
}

.day-details h3 {
  margin: 0;
  font-size: 22px;
  text-transform: uppercase;
  font-weight: 500;
}

.selected-summary {
  margin: 6px 0 10px;
  font-size: 13px;
  color: var(--muted);
}

.selected-list {
  margin: 0;
  display: grid;
  gap: 10px;
}

.detail-card {
  border: 1px solid var(--line);
  background: #fbfbfb;
  padding: 10px 12px;
}

.detail-card h4 {
  margin: 0 0 5px;
  font-size: 18px;
  font-weight: 600;
  text-transform: uppercase;
}

.detail-row {
  margin: 0 0 6px;
  line-height: 1.35;
  font-size: 14px;
}

.detail-label {
  color: #3d3d3d;
  font-weight: 600;
}

.detail-action {
  display: inline-block;
  border: 1px solid #8f8f8f;
  border-radius: 3px;
  padding: 2px 8px;
  font-size: 12px;
  text-decoration: none;
  color: #111111;
  background: #f4f4f4;
}

.detail-action:hover {
  background: #ffffff;
}

@media (max-width: 900px) {
  .site-shell {
    grid-template-columns: 1fr;
  }

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

  .status {
    margin-left: 0;
  }

  .day-cell {
    min-height: 74px;
  }
}