/* Phone-first presentation; business views and desktop layout stay shared. */
@media (max-width: 820px), (max-width: 950px) and (hover: none) and (pointer: coarse) {
  :root {
    --muted: #5d7067;
    --safe-top: env(safe-area-inset-top, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);
    --safe-left: env(safe-area-inset-left, 0px);
    --safe-right: env(safe-area-inset-right, 0px);
  }
  body { padding-top: var(--safe-top); padding-bottom: 0; }
  button, a { touch-action: manipulation; -webkit-tap-highlight-color: transparent; }
  .button:hover { transform: none; }
  .button, .button-small, .text-button { min-height: 44px; font-size: 14px; }
  .text-button { display: inline-flex; align-items: center; justify-content: center; min-width: 44px; padding: 8px; }
  .icon-button, .view-shortcut { width: 44px; height: 44px; min-width: 44px; min-height: 44px; }
  .button-primary:not(.button-small) { min-height: 48px; }
  .field input, .field select, .field textarea, .search-box input, .filter-select, .month-input {
    min-width: 0; min-height: 48px; font-size: 16px; border-radius: 12px;
  }
  .field { scroll-margin-block: 90px 100px; }
  .field > span, .form-note, .modal-subtitle { font-size: 14px; line-height: 1.6; }
  .field textarea { min-height: 100px; }
  .eyebrow, .today-label, .status { font-size: 12px; }
  .member-check { min-height: 52px; }
  .member-check input, .ledger-cancel-filter input { width: 20px; height: 20px; flex-shrink: 0; }
  .ledger-cancel-filter { min-height: 44px; font-size: 14px; }

  /* Keep useful error/saving states, without repeating the idle notice everywhere. */
  .connection-status[data-phase="online"][data-busy="false"][data-persistent="true"] { display: none; }
  body:has(.connection-status[data-phase="online"][data-busy="false"][data-persistent="true"]) .form-save-status { display: none; }
  .connection-status { font-size: 13px; line-height: 1.5; padding: 10px max(16px, var(--safe-left)); }

  .app-shell { display: block; }
  .sidebar { display: none; }
  .main-area { width: 100%; }
  .mobile-only { display: grid; }
  .topbar {
    display: grid; gap: 12px; min-height: 0;
    padding: 18px max(16px, var(--safe-right)) 12px max(16px, var(--safe-left));
  }
  .topbar h1 { font-size: 22px; line-height: 1.35; letter-spacing: -0.04em; }
  .today-label { margin: 0 0 5px; letter-spacing: 0; }
  .topbar-actions { display: grid; grid-template-columns: minmax(0, 1fr) auto 44px 48px; gap: 8px; }
  .topbar-actions .button { min-width: 0; padding-inline: 10px; font-size: 13px; }
  .topbar-actions .button-primary { width: 48px; height: 48px; padding: 0; font-size: 0; }
  .topbar-actions .button-primary span { font-size: 25px; }
  .page-content { padding: 8px max(16px, var(--safe-right)) calc(108px + var(--safe-bottom)) max(16px, var(--safe-left)); }
  .page-heading { gap: 16px; }
  .page-heading h2 { font-size: 23px; }
  .page-heading p, .panel-header p, .empty-state p { font-size: 13px; line-height: 1.6; }
  .panel { padding: 18px; border-radius: 20px; }
  .panel-header { gap: 10px; }
  .panel-header h2, .panel-header h3 { font-size: 17px; }
  .hero-card { min-height: 0; padding: 20px; }
  .hero-copy h2 { font-size: 24px; }
  .hero-copy p { font-size: 14px; line-height: 1.6; }
  .hero-body { gap: 14px; }
  .hero-stat { padding-top: 14px; }
  .hero-stat strong { font-size: 32px; }
  .hero-stat span, .hero-stat small { font-size: 13px; }
  .metric-grid, .ledger-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  .metric-grid .metric-card:last-child, .ledger-metrics .ledger-metric:last-child { grid-column: 1 / -1; }
  .metric-card, .ledger-metric { min-width: 0; min-height: 96px; padding: 16px; }
  .metric-card strong, .ledger-metric strong { font-size: 22px; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
  .metric-card span, .ledger-metric > span { font-size: 13px; }
  .metric-card small, .ledger-metric small { font-size: 12px; line-height: 1.5; }
  .member-row { gap: 12px; }
  .member-info strong, .lesson-info strong, .transaction-main strong { font-size: 15px; line-height: 1.5; }
  .member-info small, .pass-cell small, .next-cell small, .lesson-info p,
  .transaction-main small, .activity-item small, .member-lesson-info p, .member-calendar-title p { font-size: 12px; line-height: 1.55; }
  .member-row-actions, .lesson-actions, .transaction-edit-actions { gap: 8px; flex-wrap: wrap; }
  .lesson-actions .button { flex: 1; }
  .transaction-value { font-size: 15px; }
  .finance-row, .activity-item strong { font-size: 14px; }
  .activity-amount { font-size: 13px; }

  .bottom-nav {
    position: fixed; z-index: 20; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr));
    inset: auto max(12px, var(--safe-right)) calc(8px + var(--safe-bottom)) max(12px, var(--safe-left));
    padding: 6px; border: 1px solid var(--line); border-radius: 22px;
    background: rgba(255, 255, 255, 0.96); box-shadow: 0 8px 30px rgba(31, 59, 50, 0.12); backdrop-filter: blur(16px);
  }
  .bottom-nav .nav-item { display: grid; min-height: 56px; align-content: center; justify-items: center; gap: 4px; padding: 5px; font-size: 12px; }
  .bottom-nav .nav-item > span { display: flex; width: 24px; height: 24px; font-size: 22px; }
  .bottom-nav .nav-item.active { color: var(--primary-strong); background: var(--primary-soft); }
  .install-app-button { bottom: calc(94px + var(--safe-bottom)); font-size: 14px; }
  html[data-keyboard-open="true"] .bottom-nav,
  html[data-keyboard-open="true"] .install-app-button { display: none; }

  .calendar-panel, .member-calendar-panel { padding: 16px 4px; }
  .calendar-toolbar { grid-template-columns: 44px minmax(0, 1fr) 44px auto; gap: 4px; }
  .calendar-nav-button { width: 44px; height: 44px; }
  .calendar-today-button { min-height: 44px; padding-inline: 12px; }
  .calendar-toolbar h3 { font-size: 17px; }
  .calendar-day { min-height: 100px; }
  .calendar-date-number { width: 28px; height: 28px; font-size: 14px; }
  .calendar-event { font-size: 12px; }
  .calendar-legend, .calendar-more { font-size: 12px; }

  .modal {
    --sheet-bottom-inset: var(--safe-bottom);
    position: fixed; top: calc(var(--visual-viewport-top, 0px) + var(--safe-top));
    bottom: max(0px, calc(100dvh - var(--visual-viewport-top, 0px) - var(--visual-viewport-height, 100dvh)));
    left: var(--safe-left); right: var(--safe-right); margin: auto auto 0;
    width: calc(100% - var(--safe-left) - var(--safe-right)); max-width: 640px; height: fit-content;
    max-height: calc(var(--visual-viewport-height, 100dvh) - var(--safe-top) - 8px);
    border-radius: 24px 24px 0 0; touch-action: pan-y pinch-zoom;
    scroll-padding-block: 84px 96px;
  }
  .modal > form, .confirm-content, .calendar-detail-content { padding: 20px 20px calc(12px + var(--sheet-bottom-inset)); }
  .modal-header { position: sticky; top: 0; z-index: 2; gap: 12px; margin-bottom: 20px; padding-bottom: 12px; background: #fff; }
  .modal-header h2 { font-size: 22px; }
  .modal-actions { position: sticky; bottom: 0; z-index: 2; gap: 10px; padding: 12px 0; margin-top: 20px; background: #fff; border-top: 1px solid var(--line); }
  .modal-actions > .button { flex: 1; min-height: 48px; }
  html[data-keyboard-open="true"] .modal { --sheet-bottom-inset: 0px; }
  html[data-keyboard-open="true"] .modal-header .eyebrow,
  html[data-keyboard-open="true"] .modal-header .modal-subtitle,
  html[data-keyboard-open="true"] #memberManualDeductButton { display: none; }
  .member-header { padding-inline: max(16px, var(--safe-left)) max(16px, var(--safe-right)); }
  .member-content { padding-bottom: calc(90px + var(--safe-bottom)); }
  .auth-app { display: block; min-height: 100dvh; }
  .auth-showcase { min-height: 0; padding: 24px max(20px, var(--safe-right)) 36px max(20px, var(--safe-left)); }
  .auth-copy { margin-top: 22px; }
  .auth-copy h1 { font-size: 30px; }
  .auth-copy p { font-size: 14px; line-height: 1.6; }
  .auth-feature-row { display: none; }
  .auth-panel { min-height: 0; margin-top: -16px; padding: 0 max(16px, var(--safe-right)) calc(36px + var(--safe-bottom)) max(16px, var(--safe-left)); background: transparent; }
  .auth-card { padding: 24px 20px; }
  .auth-footnote { font-size: 12px; }
  .auth-footnote button { min-height: 44px; font-size: 13px; }
}
@media (max-width: 359px) {
  .metric-grid, .ledger-metrics { grid-template-columns: 1fr; }
  .topbar-actions { gap: 5px; grid-template-columns: minmax(0, 1fr) auto 44px 48px; }
  .topbar-actions .button { padding-inline: 6px; font-size: 12px; }
  .topbar-actions .button-primary { font-size: 0; }
}
@media (max-height: 500px) and (hover: none) and (pointer: coarse) {
  .auth-copy { display: none; }
  .auth-showcase { padding-block: 14px 28px; }
  .topbar { padding-top: 10px; }
  .modal-header { margin-bottom: 12px; padding-bottom: 8px; }
}
@media (prefers-reduced-motion: reduce) {
  .view.active { animation: none; }
  .button { transition: none; }
}