@media (max-width: 720px) {
  .app-navbar { padding-inline: 14px; }
  .app-shell .app-main { padding: 22px 16px 16px; }
  .app-shell .app-main-clock {
    min-height: calc(100vh - 68px);
    padding: 0;
  }
  .hero-panel {
    grid-template-columns: 1fr;
    padding: 24px;
  }
  .studies-dashboard-header,
  .calendar-toolbar,
  .day-activity-item,
  .study-time-custom,
  .study-time-chart-layout {
    display: grid;
    align-items: stretch;
    grid-template-columns: 1fr;
  }
  .study-time-header,
  .study-time-mode {
    display: grid;
  }
  .studies-dashboard-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
  }
  .study-time-periods {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .study-time-chart-tab {
    border-radius: 8px;
    justify-content: center;
    width: 100%;
  }
  .study-time-navigation {
    grid-template-columns: 48px 1fr 48px;
  }
  .study-time-arrow {
    font-size: 34px;
    height: 44px;
    width: 44px;
  }
  .study-time-legend li {
    grid-template-columns: 16px minmax(0, 1fr);
  }
  .study-time-legend strong {
    grid-column: 2;
    white-space: normal;
  }
  .study-time-bars {
    grid-template-columns: 42px minmax(0, 1fr);
  }
  .study-time-axis,
  .study-time-bars-plot {
    min-height: 280px;
  }
  .study-time-axis {
    height: 280px;
  }
  .study-time-bar-stack {
    height: 240px;
  }

  .calendar-toolbar h2 {
    order: -1;
  }
  .calendar-weekday {
    min-width: 0;
    text-align: center;
    font-size: 11px;
    padding: 0 0 8px;
  }
  .calendar-day {
    min-width: 0;
    min-height: 64px;
    padding: 8px 0 !important;
    align-items: center;
    justify-content: flex-start;
  }
  .calendar-day-number {
    position: static;
  }
  .calendar-day.is-today .calendar-day-number {
    position: static;
  }
  .calendar-day-summary,
  .calendar-day-time {
    display: none !important;
  }
  .calendar-day.has-activities::after {
    content: '';
    display: block;
    width: 6px;
    height: 6px;
    background-color: var(--accent, #10b981);
    border-radius: 50%;
    margin-top: 4px;
  }
  .day-activity-item {
    display: grid;
  }
  .timer-value { font-size: 34px; }
  .nav-logout { margin: 8px 0 0; }
  .app-body:has(.study-bottom-bar) .app-main:not(.app-main-clock) {
    padding-bottom: 120px;
  }
  .study-bottom-bar {
    padding: 12px 16px;
    bottom: 16px;
    border-radius: 100px;
    width: max-content;
    max-width: calc(100% - 32px);
    justify-content: flex-start;
  }
  .study-bottom-inner {
    gap: 8px;
  }
  /* Barra de estudos compacta: textos viram ícones, selects com largura fixa */
  .study-bottom-btn-text {
    display: none;
  }
  .study-bottom-icon {
    display: inline-flex;
    font-size: 17px;
  }
  .study-bottom-button {
    padding: 6px 10px;
  }
  .study-bottom-button svg {
    margin-right: 0 !important;
  }
  .study-bottom-bar select {
    flex: 0 0 auto;
    width: 84px;
    max-width: 84px;
    min-height: 34px;
    padding: 4px 20px 4px 10px;
    font-size: 13px;
  }
  .study-bottom-subject {
    font-size: 13px;
    max-width: 96px;
  }
  .study-bottom-timer {
    font-size: 16px;
    min-width: 0;
  }
  .session-panel .study-real-end {
    grid-template-columns: 1fr;
  }
  .study-clock-screen {
    min-height: calc(100vh - 68px);
    padding: 22px 14px;
  }
  .study-clock-meta,
  .study-clock-start {
    grid-template-columns: 1fr;
  }
  .flip-clock {
    gap: 6px;
  }
  .flip-unit {
    gap: 4px;
    grid-template-columns: repeat(2, minmax(35px, 1fr));
  }
  .flip-card {
    border-radius: 6px;
    min-width: clamp(35px, 13vw, 62px);
  }
  .flip-card-number {
    font-size: clamp(42px, 15vw, 72px);
  }
  .flip-separator {
    font-size: clamp(18px, 5vw, 32px);
  }
  table { display: block; overflow-x: auto; }
}

/* Navegação mobile: sidebar vira drawer (gaveta) com hambúrguer + backdrop */
@media (max-width: 900px) {
  .app-drawer-toggle { display: inline-flex; }
  .app-sidebar-edge-toggle { display: none; }
  
  .studies-calendar-layout {
    grid-template-columns: 1fr;
  }

  body:not(.app-clock-page) .app-shell .app-sidebar {
    transform: translateX(-100%);
    transition: transform 0.24s ease, box-shadow 0.24s ease;
    box-shadow: none;
  }
  body:not(.app-clock-page) .app-shell.drawer-open .app-sidebar {
    transform: translateX(0);
    box-shadow: 18px 0 48px rgba(8, 18, 30, 0.4);
  }
  body:not(.app-clock-page) .app-content-shell {
    margin-left: 0;
    width: 100%;
  }
}