:root {
  --ink: #202124;
  --muted: #8a8f95;
  --line: #ececec;
  --surface: #ffffff;
  --soft: #f7f7f5;
  --holiday: #2f8a4c;
  --holiday-soft: #e9f5ec;
  --exam: #c85050;
  --exam-soft: #faeaea;
  --special: #526fa5;
  --special-soft: #eaf0f8;
  --shadow: 0 6px 16px rgba(32, 33, 36, 0.14);
  font-family: "Trebuchet MS", Helvetica, sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  background: #fff;
  color: var(--ink);
  line-height: 1.5;
}

button,
select {
  font: inherit;
}

button,
select,
a {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
select:focus-visible,
a:focus-visible {
  outline: 2px solid var(--holiday);
  outline-offset: 2px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 10px;
  left: 10px;
  padding: 9px 12px;
  border-radius: 5px;
  background: #eee;
  color: #333;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.hero__inner,
.page-shell {
  width: 90vw;
  max-width: 1100px;
  margin-inline: auto;
}

.hero__inner {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  padding: 38px 0 8px;
}

.brand {
  color: #aaa;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero__copy {
  margin-top: 0;
}

.eyebrow {
  display: none;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.05;
}

.hero h1 strong {
  font-weight: 700;
}

.hero h1 #hero-year {
  color: var(--holiday);
  white-space: nowrap;
}

.past-months-toggle {
  flex: 0 0 auto;
  padding: 10px 16px;
  border: 0;
  border-radius: 5px;
  background: #eee;
  color: #777;
  cursor: pointer;
}

.past-months-toggle:hover {
  background: #e8e8e8;
}

.past-months-toggle[aria-expanded="true"] {
  background: #f5f5f5;
}

.hero__description {
  max-width: 580px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 1rem;
}

.page-shell {
  padding-bottom: 60px;
  -webkit-tap-highlight-color: transparent;
}

.page-shell:focus {
  outline: none;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.toolbar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.year-control label,
.filter-control__label {
  display: block;
  margin-bottom: 7px;
  color: #aaa;
  font-size: 0.72rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.select-wrap {
  position: relative;
  min-width: 170px;
}

.select-wrap select {
  width: 100%;
  height: 40px;
  appearance: none;
  padding: 0 40px 0 12px;
  border: 1px solid #ddd;
  border-radius: 5px;
  background: #fff;
  color: #555;
  cursor: pointer;
}

.select-wrap svg {
  position: absolute;
  top: 50%;
  right: 12px;
  width: 16px;
  transform: translateY(-50%);
  fill: none;
  stroke: #999;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
  pointer-events: none;
}

.filter-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-button {
  --category-color: #999;
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 0;
  border-radius: 5px;
  background: #eee;
  color: #777;
  cursor: pointer;
  font-size: 0.82rem;
}

.filter-button:hover {
  background: #e8e8e8;
}

.filter-button[aria-pressed="false"] {
  opacity: 0.42;
}

.filter-button__swatch {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--category-color);
}

.overview {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  padding: 44px 0 16px;
}

.overview__kicker {
  margin: 0 0 4px;
  color: #bbb;
  font-size: 0.72rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.overview h2 {
  margin: 0;
  font-size: 1.65rem;
  font-weight: 500;
}

.overview__summary {
  margin: 0 0 4px;
  color: #aaa;
  font-size: 0.82rem;
}

.loading-state,
.error-state {
  padding: 28px;
  border: 1px solid var(--line);
  color: var(--muted);
  text-align: center;
}

.loading-state[hidden] {
  display: none;
}

.months-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 40px;
  margin-top: 30px;
}

.month-card {
  min-width: 0;
  overflow: hidden;
  border: 1px solid #dfdfda;
  border-radius: 4px;
  background: #fff;
  box-shadow: var(--shadow);
}

.month-card__header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding: 16px 15px 11px;
  border-bottom: 1px solid var(--line);
}

.month-card__header h3 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 500;
}

.month-card__count {
  color: #bbb;
  font-size: 0.66rem;
}

.weekday-row,
.days-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
}

.weekday-row {
  padding: 8px 8px 4px;
  color: #bbb;
  font-size: 0.62rem;
  text-align: center;
  text-transform: uppercase;
}

.days-grid {
  gap: 2px;
  padding: 0 8px 10px;
}

.day,
.day-blank {
  min-width: 0;
  min-height: 62px;
}

.day {
  display: flex;
  min-width: 0;
  align-items: center;
  flex-direction: column;
  padding: 5px;
  overflow: hidden;
  border: 0;
  border-radius: 3px;
  background: transparent;
  color: #444;
  cursor: pointer;
  text-align: center;
}

.day:hover {
  background: #f4f4f2;
}

.day--weekend {
  background: var(--holiday-soft);
  color: var(--holiday);
}

.day--holiday {
  background: var(--holiday-soft);
  color: var(--holiday);
}

.day--exam {
  background: var(--exam-soft);
  color: var(--exam);
}

.day--past {
  background: #f5f5f2;
  color: #8a8a84;
}

.day--today {
  box-shadow: inset 0 0 0 1px var(--holiday);
}

.day__number {
  display: grid;
  width: 27px;
  height: 27px;
  place-items: center;
  border-radius: 50%;
  font-size: 1rem;
  font-weight: 500;
}

.day--today .day__number {
  background: var(--holiday);
  color: #fff;
}

.day__events {
  display: flex;
  min-width: 0;
  flex: 0 0 auto;
  align-items: center;
  flex-direction: row;
  justify-content: center;
  gap: 3px;
  margin-top: 7px;
}

.day__event-label {
  --event-color: #999;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--event-color);
  color: transparent;
  font-size: 0;
}

.day__event-label::before {
  display: none;
}

.day__more {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--special);
  color: transparent;
  font-size: 0;
}

.day--past .day__event-label,
.day--past .day__more {
  background: #d7d7d1;
}

.site-footer {
  display: flex;
  width: 90vw;
  max-width: 1100px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin: 0 auto;
  padding: 24px 0 40px;
  border-top: 1px solid var(--line);
  color: #aaa;
  font-size: 0.8rem;
}

.footer-year label {
  display: block;
  margin-bottom: 7px;
  color: #aaa;
  font-size: 0.72rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  color: #777;
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

.day-dialog {
  width: min(700px, calc(100% - 32px));
  max-height: calc(100dvh - 32px);
  padding: 0;
  overflow: visible;
  border: 0;
  border-radius: 18px;
  background: transparent;
  color: var(--ink);
}

.day-dialog::backdrop {
  background: rgba(15, 23, 42, 0.72);
}

.day-dialog__surface {
  max-height: calc(100dvh - 32px);
  padding: 24px;
  overflow-y: auto;
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 18px 48px rgba(15, 23, 42, 0.25);
}

.day-dialog__handle {
  display: none;
}

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

.day-dialog__eyebrow {
  margin: 0 0 5px;
  color: #aaa;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.day-dialog h2 {
  margin: 0;
  font-size: clamp(1.45rem, 4vw, 2rem);
  font-weight: 500;
  line-height: 1.15;
}

.icon-button {
  display: grid;
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  place-items: center;
  border: 0;
  border-radius: 50%;
  background: #eee;
  color: #777;
  cursor: pointer;
}

.icon-button svg {
  width: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-width: 1.8;
}

.dialog-events {
  display: grid;
  gap: 12px;
}

.event-card {
  --event-color: #999;
  padding: 16px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--event-color);
  border-radius: 10px;
  background: #fff;
}

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

.event-card h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
}

.event-card__category {
  flex: 0 0 auto;
  padding: 4px 7px;
  border-radius: 5px;
  background: var(--soft);
  color: var(--event-color);
  font-size: 0.62rem;
  text-transform: uppercase;
}

.event-card__range,
.event-card__meta,
.event-card__notes {
  margin: 8px 0 0;
  color: #777;
  font-size: 0.82rem;
}

.event-card__meta strong {
  color: #444;
}

.event-card__link {
  display: inline-flex;
  margin-top: 11px;
  color: var(--holiday);
  font-size: 0.82rem;
  text-underline-offset: 3px;
}

.dialog-empty {
  padding: 22px;
  border: 1px dashed #ddd;
  color: #999;
  text-align: center;
}

@media (max-width: 900px) {
  .months-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 650px) {
  .hero__inner,
  .page-shell,
  .site-footer {
    width: 90vw;
  }

  .hero__inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 18px;
    padding-top: 24px;
  }

  .hero__copy {
    margin-top: 26px;
  }

  .toolbar {
    gap: 18px;
  }

  .year-control,
  .select-wrap,
  .filter-control {
    width: 100%;
  }

  .filter-list {
    display: grid;
    grid-template-columns: 1fr;
  }

  .filter-button {
    width: 100%;
  }

  .overview {
    align-items: flex-start;
    flex-direction: column;
    padding-top: 34px;
  }

  .months-grid {
    grid-template-columns: 1fr;
    gap: 42px;
  }

  .site-footer {
    align-items: flex-end;
  }
}

@media (max-width: 500px) {
  .day,
  .day-blank {
    min-height: 56px;
  }

  .day {
    padding: 4px 2px;
  }

  .day-dialog {
    width: calc(100% - 16px);
    max-height: calc(100dvh - 16px);
  }

  .day-dialog__surface {
    max-height: calc(100dvh - 16px);
    padding: 18px;
    border-radius: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}