.contact-link {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #fff;
  text-decoration: none;
  font-size: 16px;
}

.contact-link:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

.contact-icon {
  font-size: 18px;
}

@media (max-width: 640px) {
  .app {
    padding: 12px;
    padding-bottom: 12px;
  }

  .day-selector {
    gap: 6px;
  }

  .day-btn {
    padding: 8px 12px;
    font-size: 13px;
    min-width: 70px;
  }

  .day-btn .day-name {
    font-size: 13px;
  }

  .day-btn .day-date {
    font-size: 11px;
  }

  .pair-header {
    padding: 10px 14px;
  }

  .lesson-slot {
    padding: 12px 14px;
  }
}

.week-btn {
  background: var(--card);
  border: 1px solid var(--accent);
  color: var(--accent);
}

.week-btn:hover {
  background: rgba(79, 140, 255, 0.1);
}

.week-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.day-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.day-title-arrow {
  font-size: 18px;
  color: var(--muted);
  transition: transform 0.25s ease;
  display: none;
  line-height: 1;
  margin-left: 8px;
  flex-shrink: 0;
}

@media (max-width: 767px) {
  #schedule.week-view .day-content {
    display: block;
    margin-bottom: 8px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
  }

  #schedule.week-view .day-title {
    cursor: pointer;
    padding: 14px 16px;
    margin: 0;
    background: rgba(255,255,255,0.03);
    border-bottom: 1px solid transparent;
    user-select: none;
  }

  #schedule.week-view .day-content.accordion-open .day-title {
    border-bottom-color: var(--border);
  }

  #schedule.week-view .day-title .day-title-arrow {
    display: inline-block;
  }

  #schedule.week-view .day-content.accordion-open .day-title-arrow {
    transform: rotate(180deg);
  }

  #schedule.week-view .day-body {
    display: none;
    padding: 12px;
  }

  #schedule.week-view .day-content.accordion-open .day-body {
    display: block;
  }

  #schedule.week-view .pair {
    background: var(--bg);
  }
}

@media (min-width: 768px) {
  #schedule.week-view {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto auto;
    gap: 16px;
    width: min(1200px, calc(100vw - 32px));
    margin-left: calc(50% - min(600px, calc(50vw - 16px)));
    margin-right: calc(50% - min(600px, calc(50vw - 16px)));
  }

  #schedule.week-view .day-content[data-day-index="0"] { grid-column: 1; grid-row: 1; }
  #schedule.week-view .day-content[data-day-index="3"] { grid-column: 2; grid-row: 1; }
  #schedule.week-view .day-content[data-day-index="1"] { grid-column: 1; grid-row: 2; }
  #schedule.week-view .day-content[data-day-index="4"] { grid-column: 2; grid-row: 2; }
  #schedule.week-view .day-content[data-day-index="2"] { grid-column: 1; grid-row: 3; }
  #schedule.week-view .day-content[data-day-index="5"] { grid-column: 2; grid-row: 3; }

  #schedule.week-view .day-content {
    display: flex;
    flex-direction: column;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    padding: 16px;
  }

  #schedule.week-view .day-body {
    display: block !important;
    flex: 1;
  }

  #schedule.week-view .day-title {
    margin-bottom: 12px;
    cursor: default;
  }
  #schedule.week-view .day-title .day-title-arrow {
    display: none !important;
  }

  #schedule.week-view .pair {
    margin-bottom: 8px;
  }
}

.changed-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 500;
  padding: 2px 7px;
  border-radius: 5px;
  margin-left: 7px;
  vertical-align: middle;
  background: rgba(217, 119, 6, 0.15);
  color: #d97706;
  white-space: nowrap;
}