:root {
  --color-bg: #fffdf8;
  --color-surface: #ffffff;
  --color-text: #333333;
  --color-heading: #1a1a1a;
  --color-accent: #2b6cb0;
  --color-accent-light: #ebf8ff;
  --color-border: #d1d5db;
  --color-required: #c53030;
  --color-error: #c53030;
  --color-success: #276749;
  --font-family: "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
  --font-size-base: 1.125rem;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.375rem;
  --font-size-xl: 1.75rem;
  --font-size-title: 1.75rem;
  --line-height: 1.7;
  --radius: 8px;
  --focus-ring: 3px solid #2b6cb0;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  color: var(--color-text);
  background: var(--color-bg);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

.app {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1rem;
}

/* Header */
/* トップ認証エリア（枠なし） */
.auth-bar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-areas: "user actions logout";
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 0.75rem;
}

.auth-bar__user {
  grid-area: user;
}

.auth-bar__actions {
  grid-area: actions;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.auth-bar__nav {
  display: contents;
}

.auth-bar__logout {
  grid-area: logout;
}

.auth-bar > .header__login-link {
  grid-column: 1 / -1;
  justify-self: end;
}

.header {
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
}

.header__title {
  margin: 0 0 1rem;
  font-size: var(--font-size-title);
  font-weight: 700;
  color: var(--color-heading);
  text-align: center;
}

.header__controls {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
}

.header__toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.75rem 0;
}

.header__group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.header__toolbar > .header__group + .header__group {
  margin-left: 1.5rem;
  padding-left: 0;
}

.header__group--master {
  flex-basis: 100%;
  justify-content: center;
  margin-left: 0;
  padding-left: 0;
  padding-top: 0.75rem;
}

.header__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.header__subtitle {
  margin: 0 0 0.5rem;
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-text);
  text-align: center;
}

.header__subtitle + .header__title {
  margin-bottom: 0;
}

.header__nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.75rem;
}

a.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  line-height: 1.4;
}

.month-nav {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: center;
  gap: 0.5rem 0.75rem;
}

.month-nav__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  min-height: 2.75rem;
  padding: 0;
  font-size: 1rem;
  font-weight: 700;
  font-family: inherit;
  line-height: 1;
  color: #fff;
  background: var(--color-accent);
  border: 2px solid var(--color-accent);
  border-radius: var(--radius);
  cursor: pointer;
}

.month-nav__btn:hover {
  filter: brightness(0.95);
}

.month-nav__btn:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}

.month-nav__caption {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-accent);
  white-space: nowrap;
}

.month-nav__label {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-heading);
  min-width: 8rem;
  text-align: center;
}

.header__toolbar--menu {
  justify-content: center;
  gap: 0.75rem 1.25rem;
}

.view-toggle {
  display: flex;
  gap: 0.5rem;
}

.view-toggle__btn {
  min-height: 48px;
  min-width: 120px;
  padding: 0.5rem 1.25rem;
  font-size: var(--font-size-base);
  font-weight: 700;
  font-family: inherit;
  border: 2px solid var(--color-accent);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-accent);
  cursor: pointer;
}

.view-toggle__btn--active {
  background: var(--color-accent);
  color: #fff;
}

.view-toggle__btn:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}

/* Buttons */
.btn {
  min-height: 48px;
  padding: 0.625rem 1.25rem;
  font-size: var(--font-size-base);
  font-weight: 700;
  font-family: inherit;
  border-radius: var(--radius);
  cursor: pointer;
  border: 2px solid transparent;
}

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

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

.btn--full {
  width: 100%;
}

.btn:hover {
  filter: brightness(0.95);
}

.btn:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}

/* Layout */
.layout {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.main {
  flex: 1;
  min-width: 0;
}

.main--full {
  width: 100%;
}

.sidebar {
  width: 340px;
  flex-shrink: 0;
}

/* Filters（トップメニュー枠内） */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.filters--in-header {
  background: transparent;
  border: none;
  border-radius: 0;
  box-shadow: none;
  padding: 1rem 0 0;
  margin: 0.5rem 0 0;
}

.filters__item {
  flex: 1;
  min-width: 200px;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.filters__label {
  display: inline-block;
  flex-shrink: 0;
  margin-bottom: 0;
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-heading);
  white-space: nowrap;
}

.filters__select {
  flex: 1;
  min-width: 0;
  width: auto;
  min-height: 48px;
  padding: 0.5rem 2rem 0.5rem 0.75rem;
  font-size: var(--font-size-base);
  font-family: inherit;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%23333' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
}

.export-actions {
  display: flex;
  justify-content: center;
  margin-top: 1rem;
}

.filters__select:focus-visible {
  outline: var(--focus-ring);
  border-color: var(--color-accent);
}

.filters__select--area option,
.form-control--area option {
  color: var(--color-text);
}

/* View panels */
.view-panel {
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: var(--shadow);
}

.view-panel--hidden {
  display: none;
}

/* Calendar */
.calendar__weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
  margin-bottom: 2px;
}

.calendar__weekday {
  text-align: center;
  font-size: var(--font-size-base);
  font-weight: 700;
  padding: 0.75rem 0.25rem;
  color: #fff;
  border-radius: var(--radius) var(--radius) 0 0;
}

.calendar__weekday--sun {
  background: #c53030;
}

.calendar__weekday--mon,
.calendar__weekday--tue,
.calendar__weekday--wed,
.calendar__weekday--thu,
.calendar__weekday--fri {
  background: #6b7280;
}

.calendar__weekday--sat {
  background: #2b6cb0;
}

.calendar__week {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
  align-items: stretch;
}

.calendar__week + .calendar__week {
  margin-top: 2px;
}

.calendar__cell {
  min-height: 100px;
  padding: 0.5rem;
  border: 2px solid var(--color-border);
  background: var(--color-surface);
  vertical-align: top;
}

.calendar__cell--other-month {
  background: #f7f7f7;
  opacity: 0.7;
}

.calendar__cell--today {
  background: var(--color-accent-light);
  border-color: var(--color-accent);
  border-width: 3px;
}

.calendar__cell--sun .calendar__date-num {
  color: #c53030;
}

.calendar__cell--sat .calendar__date-num {
  color: var(--color-accent);
}

.calendar__date-num {
  display: block;
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 0.5rem;
}

.calendar__events {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.event-badge {
  display: block;
  width: 100%;
  padding: 0.375rem 0.5rem;
  font-size: var(--font-size-sm);
  font-family: inherit;
  font-weight: 700;
  text-align: left;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  line-height: 1.4;
  word-break: break-word;
  color: var(--color-text);
}

.event-badge__meta {
  display: block;
}

.event-badge__meta-line {
  display: block;
}

.event-badge:hover {
  filter: brightness(0.95);
}

.event-badge:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 1px;
}

/* List */
.calendar-scroll-hint {
  display: none;
  margin: 0;
}

.list-wrapper {
  overflow-x: auto;
}

.list-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-base);
}

.list-table th {
  background: var(--color-accent);
  color: #fff;
  font-weight: 700;
  text-align: left;
  padding: 0.875rem 0.75rem;
  white-space: nowrap;
}

.list-table td {
  padding: 0.875rem 0.75rem;
  border-bottom: 2px solid var(--color-border);
  vertical-align: middle;
}

.list-table tbody tr {
  min-height: 56px;
  cursor: pointer;
}

.list-table tbody tr:hover,
.list-table tbody tr:focus-within {
  filter: brightness(0.95);
}

.list-table__cell--pre-line {
  white-space: pre-line;
}

.list-table tbody tr:focus-visible {
  outline: var(--focus-ring);
  outline-offset: -2px;
}

.list-empty {
  text-align: center;
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-heading);
  padding: 2rem;
}

.list-empty--hidden {
  display: none;
}

/* Register panel */
.register-panel {
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
  position: sticky;
  top: 1rem;
}

.register-panel__title {
  margin: 0 0 1.25rem;
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-heading);
  text-align: center;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--color-border);
}

.register-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form-group--row {
  flex-direction: row;
  gap: 0.75rem;
}

.form-group__col {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form-label {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-heading);
}

.required-badge {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 700;
  color: #fff;
  background: var(--color-required);
  padding: 0.125rem 0.5rem;
  border-radius: 4px;
  margin-left: 0.25rem;
  vertical-align: middle;
}

.form-control {
  min-height: 48px;
  padding: 0.5rem 0.75rem;
  font-size: var(--font-size-base);
  font-family: inherit;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  background: var(--color-surface);
  width: 100%;
}

.form-control--textarea {
  min-height: 100px;
  resize: vertical;
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%23333' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2rem;
}

.form-control:focus-visible {
  outline: var(--focus-ring);
  border-color: var(--color-accent);
}

.form-control--error {
  border-color: var(--color-error);
}

.form-error {
  margin: 0;
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-error);
}

.form-success {
  margin: 0;
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-success);
  text-align: center;
  padding: 0.5rem;
  background: #c6f6d5;
  border-radius: var(--radius);
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 1000;
}

.modal-overlay--hidden {
  display: none;
}

.modal {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 1.5rem;
  max-width: 560px;
  width: 100%;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.modal__header {
  flex-shrink: 0;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--color-border);
}

.modal__close {
  flex-shrink: 0;
  margin: -0.25rem -0.25rem 0 0;
  padding: 0;
  width: 2.75rem;
  height: 2.75rem;
  border: none;
  background: transparent;
  color: var(--color-heading);
  font-size: 1.75rem;
  line-height: 1;
  cursor: pointer;
  border-radius: var(--radius);
}

.modal__close:hover {
  background: var(--color-border);
}

.modal__close:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}

.modal__body {
  overflow-y: auto;
  overscroll-behavior: contain;
  flex: 1;
  min-height: 0;
}

.modal:focus {
  outline: none;
}

.modal:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}

.modal__title {
  margin: 0;
  flex: 1;
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-heading);
}

.modal__details {
  margin: 0 0 1.5rem;
  display: grid;
  gap: 1rem;
}

.modal__details dt {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 0.25rem;
}

.modal__details dd {
  margin: 0;
  font-size: var(--font-size-base);
  color: var(--color-text);
  word-break: break-word;
}

.modal__details dd.modal__details-dd--pre-line {
  white-space: pre-line;
}

.modal__actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.modal__calendar-hint {
  margin: -0.25rem 0 0;
  font-size: var(--font-size-sm);
  line-height: 1.6;
  color: var(--color-text);
}

.modal__link {
  display: inline-block;
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-accent);
  text-decoration: underline;
  margin-top: 0.25rem;
}

.modal__link:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}

.modal__empty {
  color: var(--color-text);
}

/* Register page */
.app--register {
  max-width: 720px;
}

.register-page {
  margin-top: 0;
}

.register-panel--page {
  position: static;
  max-width: 100%;
}

.register-panel--page .register-form {
  max-width: 100%;
}

/* 開催場所一覧: 地区ごとの折りたたみ */
.venue-area + .venue-area {
  margin-top: 0.75rem;
}

.venue-area__toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  width: 100%;
  margin: 0;
  padding: 0.625rem 0.75rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-heading);
  font-size: var(--font-size-base);
  font-weight: 700;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
}

.venue-area__toggle:hover,
.venue-area__toggle:focus-visible {
  border-color: var(--color-accent);
}

.venue-area__toggle:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}

.venue-area__icon {
  flex-shrink: 0;
  font-size: 0.875rem;
  line-height: 1;
}

.venue-area__body {
  margin-top: 0.5rem;
  padding: 0 0.25rem 0.5rem;
}

.venue-area__body[hidden] {
  display: none;
}

/* ===================================================
   Responsive
   =================================================== */

/* Tablet (768px and below) */
@media (max-width: 768px) {
  .app {
    padding: 0.75rem;
  }

  .header {
    padding: 1rem;
  }

  .auth-bar {
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "user logout"
      "actions actions";
    gap: 0.75rem;
  }

  .auth-bar__actions {
    width: 100%;
  }

  .auth-bar__actions > .btn,
  .auth-bar__nav > .btn {
    flex: 1 1 calc(50% - 0.75rem);
    min-width: 0;
  }

  .auth-bar__profile {
    margin-left: 0;
  }

  .header__title {
    font-size: 1.375rem;
    margin-bottom: 0.75rem;
  }

  .header__subtitle + .header__title {
    margin-bottom: 0;
  }

  .header__controls,
  .header__toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: 0.875rem;
  }

  .header__toolbar--menu {
    align-items: center;
  }

  .header__toolbar > .header__group + .header__group:not(.header__group--master) {
    margin-left: 0;
    padding-left: 0;
    margin-top: 0.25rem;
    padding-top: 0.75rem;
  }

  .header__group--master {
    padding-top: 0.75rem;
  }

  .header__group {
    justify-content: center;
    width: 100%;
  }

  .header__group--event .month-nav {
    width: 100%;
  }

  .header__group--event .view-toggle {
    width: 100%;
  }

  .header__group--event > .btn {
    width: 100%;
  }

  .header__group--user {
    flex-direction: column;
    align-items: stretch;
  }

  .header__group--user .logout-form {
    display: block;
    width: 100%;
  }

  .header__group--user > .btn,
  .header__group--user .logout-form .btn {
    width: 100%;
  }

  .header__group--user > .header__login-link {
    width: auto;
    align-self: flex-end;
  }

  .header__group--master .btn {
    width: 100%;
  }

  .month-nav {
    justify-content: center;
    width: 100%;
  }

  .month-nav .btn {
    flex: 1;
    min-width: 0;
    padding-left: 0.5rem;
    padding-right: 0.5rem;
    font-size: 1rem;
  }

  .month-nav__label {
    flex: 0 0 auto;
    min-width: 0;
    font-size: 1.25rem;
  }

  .month-nav__caption {
    font-size: 1rem;
  }

  .header__actions {
    flex-direction: column;
    width: 100%;
    gap: 0.625rem;
  }

  .view-toggle {
    width: 100%;
  }

  .view-toggle__btn {
    flex: 1;
    min-width: 0;
  }

  .header__actions > .btn {
    width: 100%;
  }

  /* 幅狭時: 地区・種別を左右半分に並べ、ラベル上・セレクト下 */
  .filters {
    flex-direction: row;
    flex-wrap: nowrap;
    gap: 0.75rem;
    padding: 0.875rem 0 0;
  }

  .filters--in-header {
    padding-top: 0.875rem;
  }

  .filters__item {
    flex: 1 1 0;
    min-width: 0;
    width: auto;
    flex-direction: column;
    align-items: stretch;
    gap: 0.35rem;
  }

  .filters__label {
    white-space: normal;
    line-height: 1.3;
  }

  .filters__select {
    width: 100%;
  }

  .export-actions {
    margin-top: 0.75rem;
  }

  .view-panel {
    padding: 0.75rem;
  }

  /* Calendar: horizontal scroll on narrow screens */
  .view-panel--calendar {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .calendar-scroll-hint {
    display: block;
    margin: 0 0 0.5rem;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-accent);
    text-align: center;
  }

  /* 768px以下: 名称5文字折り返し固定・横スクロール可 */
  .calendar {
    min-width: 40rem;
  }

  .calendar__weekday {
    font-size: 1rem;
    padding: 0.5rem 0.125rem;
  }

  .calendar__cell {
    min-height: 80px;
    min-width: 5.5625rem;
    padding: 0.375rem;
  }

  .calendar__date-num {
    font-size: 1.125rem;
    margin-bottom: 0.375rem;
  }

  .event-badge {
    font-size: 0.8125rem;
    padding: 0.5rem 0.375rem;
    width: max(100%, calc(5em + 0.75rem));
  }

  .event-badge__meta {
    display: none;
  }

  /* List: card layout */
  .list-wrapper {
    overflow-x: visible;
  }

  .list-table thead {
    display: none;
  }

  .list-table,
  .list-table tbody,
  .list-table tr,
  .list-table td {
    display: block;
    width: 100%;
  }

  .list-table tbody tr {
    margin-bottom: 1rem;
    padding: 1rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
  }

  .list-table tbody tr:hover,
  .list-table tbody tr:focus-within {
    filter: brightness(0.95);
    border-color: var(--color-accent);
  }

  .list-table td {
    padding: 0.375rem 0;
    border-bottom: none;
    text-align: left;
  }

  .list-table td::before {
    content: attr(data-label);
    display: block;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-heading);
    margin-bottom: 0.125rem;
  }

  .list-table td[data-label="イベント名称"] {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-heading);
    padding-bottom: 0.5rem;
    margin-bottom: 0.375rem;
    border-bottom: 1px solid var(--color-border);
  }

  .list-table td[data-label="イベント名称"]::before {
    display: none;
  }

  /* Register form: stack time inputs */
  .form-group--row {
    flex-direction: column;
    gap: 1rem;
  }

  .modal {
    padding: 1.25rem;
    max-height: 85vh;
  }

  .modal__title {
    font-size: 1.375rem;
  }

  .layout {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
  }
}

/* Mobile (480px and below) */
@media (max-width: 480px) {
  html {
    font-size: 15px;
  }

  .app {
    padding: 0.5rem;
  }

  .header__title {
    font-size: 1.25rem;
    line-height: 1.4;
  }

  .header__subtitle {
    font-size: 1rem;
  }

  .month-nav {
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: center;
    gap: 0.375rem 0.5rem;
  }

  .month-nav__label {
    flex: 0 1 auto;
    min-width: 0;
    font-size: 1.125rem;
  }

  .month-nav__caption {
    font-size: 0.9375rem;
  }

  .month-nav__btn {
    width: 2.5rem;
    height: 2.5rem;
    min-height: 2.5rem;
    flex-shrink: 0;
  }

  .view-toggle {
    flex-direction: column;
  }

  .view-toggle__btn {
    width: 100%;
  }

  .calendar__cell {
    min-height: 72px;
  }

  .event-badge {
    font-size: 0.8125rem;
  }

  .list-table tbody tr {
    padding: 0.875rem;
  }

  .modal-overlay {
    padding: 0.5rem;
    align-items: flex-end;
  }

  .modal {
    border-radius: var(--radius) var(--radius) 0 0;
    max-height: 92vh;
  }

  .header__nav .btn {
    width: 100%;
  }

  .app--register {
    padding: 0.5rem;
  }

  .register-panel {
    padding: 1rem;
  }
}

/* Desktop: hide scroll hint / 管理人情報を右寄せ */
@media (min-width: 769px) {
  .calendar-scroll-hint {
    display: none;
  }

  .auth-bar__profile {
    margin-left: auto;
  }
}

/* ログイン・認証 UI */
.header__login-link {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 0 0.2rem;
  font-size: 0.75rem;
  font-weight: 400;
  color: #888;
  text-decoration: none;
  line-height: 1.2;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

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

.header__login-link:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ログアウト: 登録者ログインと同じ見た目の submit ボタン */
button.header__login-link.logout-form__link {
  appearance: none;
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
}

.form-error-list {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0.75rem 1rem;
  background: #fed7d7;
  border-radius: var(--radius);
}

.form-error-list .form-error + .form-error {
  margin-top: 0.5rem;
}

.form-hint {
  margin: 0.35rem 0 0;
  font-size: 0.9rem;
  color: #555;
}

.form-hint--steps {
  padding-left: 1.35rem;
}

.form-hint--steps li + li {
  margin-top: 0.35rem;
}

/* 開催場所登録: 緯度経度入力手順のアコーディオン（テキストリンク風） */
.form-hint-accordion {
  margin-top: 0.25rem;
}

.form-hint-accordion__toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin: 0;
  padding: 0.15rem 0;
  border: none;
  border-radius: 0;
  background: transparent;
  color: var(--color-accent);
  font-size: 0.9rem;
  font-weight: 700;
  font-family: inherit;
  text-align: left;
  text-decoration: underline;
  text-underline-offset: 0.15em;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.form-hint-accordion__toggle:hover,
.form-hint-accordion__toggle:focus-visible {
  color: #1a4f8a;
}

.form-hint-accordion__toggle:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}

.form-hint-accordion__icon {
  flex-shrink: 0;
  font-size: 0.75rem;
  line-height: 1;
  text-decoration: none;
}

.form-hint-accordion__body {
  margin-top: 0.25rem;
  padding: 0 0 0.15rem;
}

.form-hint-accordion__body[hidden] {
  display: none;
}

.form-hint-accordion__body .form-hint--steps {
  margin: 0.25rem 0 0;
}

.header__user {
  font-size: var(--font-size-base);
  font-weight: 700;
}

.logout-form {
  display: inline;
}

.logout-form__link {
  margin: 0;
}

.form-notice--privacy {
  margin: 0 0 1rem;
  padding: 0.75rem 1rem;
  font-weight: 700;
  color: var(--color-error);
  background: #fff5f5;
  border: 2px solid var(--color-error);
  border-radius: var(--radius);
  text-align: center;
}

.form-readonly {
  margin: 0;
  padding: 0.5rem 0;
  font-size: var(--font-size-base);
}

.form-group--readonly {
  margin-bottom: 0.75rem;
}

.form-audit {
  margin: 0 0 1rem;
  font-size: 0.9rem;
  color: #555;
  line-height: 1.6;
}

.report-image-preview {
  display: block;
  max-width: 100%;
  max-height: 240px;
  margin: 0.5rem 0;
  border-radius: var(--radius);
  object-fit: contain;
}

.report-image-existing,
.report-image-new-preview {
  margin-bottom: 0.5rem;
}

.modal__report-section {
  border-top: 1px solid #ddd;
  margin-top: 1rem;
  padding-top: 1rem;
}

.modal__report-heading {
  margin: 0 0 0.75rem;
  font-size: 1.1rem;
  font-weight: 700;
}

.modal__report-content {
  margin: 0 0 1rem;
  font-size: var(--font-size-base);
  color: var(--color-text);
  word-break: break-word;
}

.modal__report-images {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

.modal__announcement-image-wrap {
  margin: 0 0 1rem;
}

.modal__announcement-image-btn {
  display: block;
  width: 100%;
  padding: 0;
  border: none;
  background: none;
  cursor: zoom-in;
  border-radius: var(--radius);
}

.modal__announcement-image-btn:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}

.modal__announcement-image {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  object-fit: contain;
}

.modal__report-image-btn {
  display: inline-block;
  padding: 0;
  border: none;
  background: none;
  cursor: zoom-in;
  border-radius: var(--radius);
}

.modal__report-image-btn:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}

.modal__report-image {
  display: block;
  max-width: 120px;
  max-height: 120px;
  border-radius: var(--radius);
  object-fit: cover;
}

.image-lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: rgba(0, 0, 0, 0.85);
}

.image-lightbox__img {
  max-width: min(100%, 960px);
  max-height: calc(100vh - 6rem);
  object-fit: contain;
  border-radius: var(--radius);
}

.image-lightbox__close {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 2001;
}