:root {
  --bg-color: #050505;
  --surface-color: #111111;
  --accent-color: #ffffff;
  --text-main: #ffffff;
  --text-muted: #888888;
  --border-color: #222222;
  --hover-border: #444444;
  --transition: 0.2s ease;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Outfit', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.app-wrapper {
  display: flex;
  min-height: 100vh;
  width: 100%;
}

.solar-side {
  flex: 1.2;
  position: sticky;
  top: 0;
  height: 100vh;
  background-color: #000;
  border-right: 1px solid var(--border-color);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.solar-header {
  height: 150px;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 0 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.solar-header p {
  font-family: 'Outfit', sans-serif;
  font-weight: 100;
  font-size: 1.1rem;
  color: var(--text-muted);
  letter-spacing: 5px;
  text-transform: uppercase;
  text-align: center;
  opacity: 0.8;
}

#solar-system-bg {
  flex: 1;
  width: 100%;
  display: block;
}

.calendar-side {
  flex: 1;
  background-color: var(--bg-color);
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 40px;
  overflow-y: auto;
}

#solar-system-bg {
  width: 100%;
  height: 100%;
  display: block;
}

.calendar-container {
  width: 100%;
  max-width: 800px;
  background: transparent;
  padding: 0;
}

@media (max-width: 1024px) {
  .app-wrapper {
    flex-direction: column;
  }
  .solar-side {
    height: 50vh;
    min-height: 450px;
    position: relative;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
  .solar-header {
    height: 100px; /* Shorter for mobile */
  }
  .calendar-side {
    padding: 20px;
  }
  .day-cell {
    min-height: 80px;
    padding: 12px 10px;
  }
  .day-num {
    font-size: 1.2rem;
  }
}

header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 60px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 20px;
}

.month-info {
  text-align: left;
}

#month-name {
  font-size: 3.5rem;
  font-weight: 200;
  letter-spacing: -2px;
  margin-bottom: 10px;
}

.clocks-container {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.clock-display {
  font-family: 'Courier New', monospace;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.slx-color {
  color: var(--text-main);
}

.nav-controls {
  display: flex;
  gap: 10px;
}

.nav-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  width: 40px;
  height: 40px;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: var(--transition);
}

.nav-btn:hover {
  border-color: var(--accent-color);
  background: var(--surface-color);
}

.nav-btn svg {
  width: 18px;
  height: 18px;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 1px;
  background-color: var(--border-color);
  border: 1px solid var(--border-color);
}

.weekday-header {
  background-color: var(--bg-color);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-muted);
  text-align: center;
  padding: 15px 0;
  font-weight: 400;
}

.weekday-header .short-name {
  display: none;
}
.weekday-header .full-name {
  display: inline;
}

.day-cell {
  background-color: var(--bg-color);
  padding: 20px 15px;
  min-height: 100px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.day-cell:hover {
  background-color: var(--surface-color);
  z-index: 10;
  border-color: rgba(0, 229, 255, 0.3);
  transform: translateY(-2px);
}

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

.day-cell.selected-day {
  box-shadow: inset 0 0 0 2px #00e5ff, 0 0 10px rgba(0, 229, 255, 0.2);
  z-index: 5;
}

.day-num {
  font-size: 1.5rem;
  font-weight: 300;
}

.year-day-num {
  font-size: 0.7rem;
  color: var(--text-muted);
  align-self: flex-end;
}

.calendar-grid.leap-layout {
  grid-template-columns: repeat(2, 1fr);
  max-width: 400px;
  margin: 0;
}

.day-num.leap-day-highlight {
  color: #FF2400; /* Intense Scarlet */
  font-weight: 700;
  text-shadow: 0 0 12px rgba(255, 36, 0, 0.9);
}

.day-cell.leap-day-active {
  background-color: #000000 !important;
  border-color: #FF2400 !important;
  box-shadow: 0 0 20px rgba(255, 36, 0, 0.3);
}

.day-cell.non-leap-inactive {
  background-color: #000000 !important; /* Force black, no transparency to grid */
  border-color: #1a1a1a;
}

.day-cell.non-leap-inactive .day-num,
.day-cell.non-leap-inactive .year-day-num {
  opacity: 0.2; /* Only dim the text */
}

.leap-timeline {
  margin-top: 60px;
  padding-top: 20px;
  border-top: 1px dotted var(--border-color);
  font-family: 'Courier New', monospace;
  display: flex;
  justify-content: space-between;
  width: 100%;
}

.timeline-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
}

.year-text {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.label-text {
  font-size: 1.2rem;
  font-weight: 200;
  color: var(--text-muted);
  letter-spacing: 2px;
}

.timeline-item.active .year-text {
  color: var(--text-main);
  text-decoration: underline;
}

.timeline-item.active .label-text {
  color: var(--text-main);
}



@media (max-width: 600px) {
  .solar-side {
    height: 95vw; /* Square-ish for maximum system size */
  }
  .calendar-side {
    padding: 15px 10px;
  }
  #month-name {
    font-size: 2.2rem;
  }
  header {
    flex-direction: column;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 30px;
  }
  .day-cell {
    min-height: 60px;
    padding: 8px 6px;
  }
  .day-num {
    font-size: 1rem;
  }
  .weekday-header {
    padding: 10px 0;
    font-size: 0.6rem;
    letter-spacing: 1px;
  }
  .weekday-header .full-name {
    display: none;
  }
  .weekday-header .short-name {
    display: inline;
  }
  .label-text {
    font-size: 0.9rem;
    letter-spacing: 1px;
  }
  .year-text {
    font-size: 0.6rem;
  }
  .leap-timeline {
    margin-top: 30px;
  }
}