* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: linear-gradient(135deg, #6d2dcf, #24b7d8);
  color: #fff;
  font-size: 16px;
}

.app-shell {
  max-width: 960px;
  margin: 0 auto;
  padding: 20px;
  display: grid;
  gap: 18px;
}

.hero-card,
.panel {
  background: rgba(10, 18, 35, 0.78);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 22px;
  padding: 22px;
  backdrop-filter: blur(8px);
}

.eyebrow {
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #bdeaff;
  font-size: 12px;
}

h1,
h2 {
  margin: 0 0 8px;
}

h1 {
  font-size: 28px;
  line-height: 1.18;
}

h2 {
  font-size: 24px;
  line-height: 1.22;
}

.muted {
  color: rgba(255, 255, 255, 0.72);
  font-size: 15px;
  line-height: 1.55;
}

.hero-actions,
.day-links,
.panel-header {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

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

.button,
button {
  border: 0;
  border-radius: 12px;
  padding: 13px 18px;
  background: #fff;
  color: #122036;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

.button.secondary {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
}

.panel-day {
  padding-top: 18px;
}

.inline-field {
  display: grid;
  gap: 6px;
  font-size: 14px;
}

.hidden {
  display: none;
}

.inline-field input {
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  padding: 10px 12px;
}

.calendar-grid {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(112px, 124px);
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 8px;
  scroll-snap-type: x proximity;
}

.day-tile {
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  min-height: 86px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  text-align: left;
  scroll-snap-align: start;
}

.day-tile strong {
  display: block;
  font-size: 15px;
  line-height: 1.2;
  margin-bottom: 8px;
  white-space: nowrap;
}

.day-tile span {
  display: -webkit-box;
  font-size: 12px;
  line-height: 1.35;
  color: rgba(255, 255, 255, 0.82);
  overflow: hidden;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  word-break: break-word;
}

.day-tile.available {
  background: rgba(255, 255, 255, 0.16);
}

.day-tile.active {
  outline: 2px solid #fff;
}

.day-tile.locked {
  opacity: 0.45;
}

.day-content {
  margin-top: 14px;
  font-size: 20px;
  line-height: 1.75;
  white-space: pre-wrap;
  word-break: break-word;
  letter-spacing: 0.01em;
}

.day-content a {
  color: #fff;
}

.day-content p,
.day-content ul,
.day-content ol,
.day-content h1,
.day-content h2,
.day-content h3,
.day-content h4 {
  margin-top: 0;
  margin-bottom: 16px;
}

.day-content h1,
.day-content h2,
.day-content h3,
.day-content h4 {
  line-height: 1.3;
}

.day-content ul,
.day-content ol {
  padding-left: 22px;
}

.day-content li {
  margin-bottom: 8px;
}

.day-audio {
  margin-top: 18px;
}

.day-audio audio {
  width: 100%;
}

.day-header {
  max-width: 100%;
}

.day-navigation {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(140px, auto) minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  margin-top: 16px;
}

.nav-button {
  min-height: 48px;
}

.selected-day-label {
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px 14px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 16px;
  font-weight: 700;
  text-align: center;
}

#dayTitle {
  margin-bottom: 10px;
}

#daySummary {
  font-size: 16px;
}

.day-links {
  margin-top: 18px;
}

.calendar-grid::-webkit-scrollbar {
  height: 8px;
}

.calendar-grid::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 999px;
}

@media (max-width: 640px) {
  .app-shell {
    padding: 14px;
    gap: 14px;
  }

  .hero-card,
  .panel {
    border-radius: 20px;
    padding: 18px;
  }

  h1 {
    font-size: 24px;
  }

  h2 {
    font-size: 20px;
  }

  .muted {
    font-size: 14px;
  }

  .calendar-grid {
    grid-auto-columns: minmax(104px, 114px);
    gap: 10px;
  }

  .day-tile {
    min-height: 80px;
    padding: 12px;
  }

  .day-tile strong {
    font-size: 15px;
  }

  .day-tile span {
    font-size: 12px;
    line-height: 1.36;
  }

  .day-content {
    font-size: 21px;
    line-height: 1.78;
  }

  #daySummary {
    font-size: 15px;
  }
}

@media (max-width: 420px) {
  .hero-actions,
  .day-links,
  .panel-header {
    gap: 10px;
  }

  .button,
  button {
    width: 100%;
    justify-content: center;
    text-align: center;
  }

  .calendar-grid {
    grid-auto-columns: minmax(100px, 108px);
  }

  .day-content {
    font-size: 22px;
    line-height: 1.8;
  }

  .day-navigation {
    grid-template-columns: 1fr;
  }

  .selected-day-label {
    order: -1;
    font-size: 17px;
  }
}