:root {
  color-scheme: light dark;
  --bg: #f2f4f7;
  --card: #ffffff;
  --text: #1a1f36;
  --muted: #5f6b85;
  --accent: #1a73e8;
  --marked: #c51400;
  --active-marked: #c51400;
  --tentative: #d58b00;
  --active-tentative: #d58b00;
  --border: #d8dfeb;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #10151f;
    --card: #161f2d;
    --text: #e7ecf7;
    --muted: #afbdd8;
    --accent: #67a3ff;
    --marked: #ec240e;
    --active-marked: #ec240e;
    --tentative: #ffb547;
    --active-tentative: #ffb547;
    --border: #2a374d;
  }
}

* {
  box-sizing: border-box;
}

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

.app {
  max-width: 980px;
  margin: 0 auto;
  padding: 1.25rem;
}

.toolbar {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  margin-bottom: 1rem;
}

h1 {
  font-size: 1.35rem;
  margin: 0 0 0.2rem;
}

p {
  margin: 0;
  color: var(--muted);
}

.actions {
  display: flex;
  gap: 0.6rem;
}

button {
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  border-radius: 10px;
  padding: 0.55rem 0.85rem;
  cursor: pointer;
  font-weight: 600;
}

button:hover {
  border-color: var(--accent);
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1rem;
}

.planning-panel {
  margin: 0 0 1rem;
  padding: 0.9rem;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--card);
}

.planning-panel summary {
  cursor: pointer;
  font-weight: 700;
  list-style: none;
}

.planning-panel summary::-webkit-details-marker {
  display: none;
}

.planning-panel summary::before {
  content: "▸";
  display: inline-block;
  margin-right: 0.45rem;
  transition: transform 0.15s ease;
}

.planning-panel[open] summary::before {
  transform: rotate(90deg);
}

.planning-panel p {
  margin-top: 0.55rem;
}

.planning-controls {
  margin-top: 0.6rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem 0.8rem;
  align-items: center;
}

.planning-controls label {
  font-size: 0.9rem;
  color: var(--muted);
}

#planningLinkInput {
  width: 100%;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--card), var(--bg) 35%);
  color: var(--text);
  border-radius: 10px;
  padding: 0.55rem 0.65rem;
}

#planningLabelInput {
  width: 100%;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--card), var(--bg) 35%);
  color: var(--text);
  border-radius: 10px;
  padding: 0.55rem 0.65rem;
}

#planningColorInput {
  width: 100%;
}

#mainColorInput {
  width: 100%;
}

.color-palette {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.color-swatch {
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--card), #000 22%);
  cursor: pointer;
  padding: 0;
}

.color-swatch.is-selected {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.planning-actions {
  grid-column: 1 / -1;
  display: flex;
  gap: 0.6rem;
}

.planning-status {
  grid-column: 1 / -1;
  min-height: 1.2rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.planning-imports-list {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.planning-import-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.4rem 0.55rem;
  font-size: 0.88rem;
}

.planning-import-main {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted);
}

.planning-import-actions {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.planning-import-swatch {
  width: 0.9rem;
  height: 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  flex-shrink: 0;
  padding: 0;
  cursor: context-menu;
}

.collab-color-menu {
  position: fixed;
  z-index: 50;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card);
  padding: 0.45rem;
  box-shadow: 0 10px 28px color-mix(in srgb, var(--text), transparent 86%);
}

.collab-color-menu .color-palette {
  max-width: 10rem;
}

.legend {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.2rem;
  justify-content: center;
  color: var(--muted);
  font-size: 0.92rem;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.legend-swatch {
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 0.35rem;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--card), var(--bg) 42%);
}

.legend-swatch.full,
.legend-swatch.upper,
.legend-swatch.lower {
  border-color: var(--marked);
}

.legend-swatch.full {
  background: color-mix(in srgb, var(--marked), transparent 78%);
}

.legend-swatch.upper {
  background: linear-gradient(
    to bottom,
    color-mix(in srgb, var(--marked), transparent 78%) 0%,
    color-mix(in srgb, var(--marked), transparent 78%) 50%,
    color-mix(in srgb, var(--card), var(--bg) 42%) 50%,
    color-mix(in srgb, var(--card), var(--bg) 42%) 100%
  );
}

.legend-swatch.lower {
  background: linear-gradient(
    to bottom,
    color-mix(in srgb, var(--card), var(--bg) 42%) 0%,
    color-mix(in srgb, var(--card), var(--bg) 42%) 50%,
    color-mix(in srgb, var(--marked), transparent 78%) 50%,
    color-mix(in srgb, var(--marked), transparent 78%) 100%
  );
}

.legend-swatch.tentative {
  border-color: var(--tentative);
  background: color-mix(in srgb, var(--tentative), transparent 72%);
}

.legend-swatch.imported {
  border-color: var(--muted);
  background: radial-gradient(circle at center, var(--muted) 55%, transparent 60%);
}

.calendar-nav {
  margin: 0 0 1rem;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1rem;
  align-items: center;
}

#prevMonthsButton {
  justify-self: start;
}

#currentMonthsButton {
  justify-self: center;
}

#nextMonthsButton {
  justify-self: end;
}

@media (max-width: 700px) {
  #prevMonthsButton,
  #currentMonthsButton,
  #nextMonthsButton {
    justify-self: center;
  }

  .calendar-nav {
    grid-template-columns: 1fr;
    gap: 0.6rem;
  }
}

.calendar {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 0.9rem;
}

.calendar h2 {
  margin: 0 0 0.75rem;
  font-size: 1.08rem;
}

.weekday-row,
.day-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.35rem;
}

.weekday {
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 0.2rem;
}

.day {
  border: 1px solid transparent;
  background: color-mix(in srgb, var(--card), var(--bg) 42%);
  color: var(--text);
  border-radius: 8px;
  aspect-ratio: 1;
  font-weight: 600;
}

.day.empty {
  visibility: hidden;
}

.day.available {
  border-color: var(--border);
}

.day.today {
  box-shadow: inset 0 0 0 2px var(--accent);
  font-weight: 700;
}

.day.full,
.day.upper,
.day.lower {
  border-color: var(--active-marked);
  color: var(--active-marked);
}

.day.tentative {
  border-color: var(--active-tentative);
  color: var(--active-tentative);
  background: color-mix(in srgb, var(--active-tentative), transparent 72%);
}

.day.full {
  background: color-mix(in srgb, var(--active-marked), transparent 78%);
}

.day.upper {
  background: linear-gradient(
    to bottom,
    color-mix(in srgb, var(--active-marked), transparent 78%) 0%,
    color-mix(in srgb, var(--active-marked), transparent 78%) 50%,
    color-mix(in srgb, var(--card), var(--bg) 42%) 50%,
    color-mix(in srgb, var(--card), var(--bg) 42%) 100%
  );
}

.day.lower {
  background: linear-gradient(
    to bottom,
    color-mix(in srgb, var(--card), var(--bg) 42%) 0%,
    color-mix(in srgb, var(--card), var(--bg) 42%) 50%,
    color-mix(in srgb, var(--active-marked), transparent 78%) 50%,
    color-mix(in srgb, var(--active-marked), transparent 78%) 100%
  );
}

.day.has-imports {
  position: relative;
  border-width: 2px;
  border-color: color-mix(in srgb, var(--accent), var(--border) 35%);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent), transparent 70%);
}

.imported-markers {
  position: absolute;
  top: 0.2rem;
  right: 0.16rem;
  display: inline-flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.12rem;
  max-height: calc(100% - 0.4rem);
  overflow: hidden;
  pointer-events: none;
}

.imported-marker {
  width: 0.38rem;
  height: 0.72rem;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--card), #000 26%);
  box-shadow: 0 1px 2px color-mix(in srgb, #000, transparent 80%);
  flex-shrink: 0;
}

.imported-marker-more {
  width: auto;
  min-width: 0.86rem;
  height: 0.72rem;
  padding: 0 0.16rem;
  border-radius: 0.42rem;
  background: color-mix(in srgb, var(--card), var(--text) 12%);
  border: 1px solid color-mix(in srgb, var(--border), var(--text) 30%);
  color: var(--text);
  font-size: 0.56rem;
  font-weight: 700;
  line-height: 0.64rem;
  text-align: center;
}

@media (max-width: 700px) {
  .planning-controls {
    grid-template-columns: 1fr;
  }
}