*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ---- CSS Variables ---- */
:root {
  --bg-body: #f5f6fa;
  --text-main: #333;
  --header-bg: #2c3e50;
  --header-text: #fff;
  --grid-bg: #fff;
  --grid-border: #ddd;
  --grid-border-light: #eee;
  --header-cell-bg: #ecf0f1;
  --today-header-bg: #d5e8f7;
  --today-col-bg: #f0f7ff;
  --today-cell-bg: #eaf4ff;
  --time-label-bg: #fafafa;
  --time-label-color: #888;
  --outside-cell-bg: #f9f9f9;
  --outside-cell-text: #bbb;
  --today-badge-bg: #2c3e50;
  --nav-btn-bg: #fff;
  --nav-btn-border: #aaa;
  --nav-btn-hover: #e9e9e9;
  --modal-bg: #fff;
  --modal-overlay-bg: rgba(0, 0, 0, 0.4);
  --modal-close-color: #888;
  --label-color: #555;
  --input-border: #ccc;
  --input-focus-border: #3498db;
  --input-focus-shadow: rgba(52, 152, 219, 0.2);
  --input-bg: #fff;
  --input-text: #333;
}

[data-theme="dark"] {
  --bg-body: #1a1a2e;
  --text-main: #e0e0e0;
  --header-bg: #16213e;
  --header-text: #e0e0e0;
  --grid-bg: #1f2937;
  --grid-border: #374151;
  --grid-border-light: #2d3748;
  --header-cell-bg: #283548;
  --today-header-bg: #1e3a5f;
  --today-col-bg: #1a2744;
  --today-cell-bg: #1a2744;
  --time-label-bg: #1c2536;
  --time-label-color: #8899aa;
  --outside-cell-bg: #161e2e;
  --outside-cell-text: #556;
  --today-badge-bg: #3b82f6;
  --nav-btn-bg: #283548;
  --nav-btn-border: #4b5563;
  --nav-btn-hover: #374151;
  --modal-bg: #1f2937;
  --modal-overlay-bg: rgba(0, 0, 0, 0.6);
  --modal-close-color: #9ca3af;
  --label-color: #9ca3af;
  --input-border: #4b5563;
  --input-focus-border: #3498db;
  --input-focus-shadow: rgba(52, 152, 219, 0.3);
  --input-bg: #283548;
  --input-text: #e0e0e0;
}

body {
  font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
  background: var(--bg-body);
  color: var(--text-main);
  min-height: 100vh;
}

/* ---- Header ---- */
header {
  background: var(--header-bg);
  color: var(--header-text);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

header h1 {
  font-size: 1.4rem;
}

.btn-theme {
  margin-left: 8px;
  background: none;
  border: 1px solid var(--header-text);
  color: var(--header-text);
  border-radius: 4px;
  padding: 6px 10px;
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
  transition: background 0.2s;
}

.btn-theme:hover {
  background: rgba(255, 255, 255, 0.15);
}

.view-toggle {
  display: flex;
  gap: 4px;
}

.view-toggle button {
  padding: 6px 18px;
  border: 1px solid var(--header-text);
  background: transparent;
  color: var(--header-text);
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background 0.2s;
}

.view-toggle button.active {
  background: var(--header-text);
  color: var(--header-bg);
}

/* ---- Navigation ---- */
.nav-bar {
  display: flex;
  align-items: center;
  padding: 16px 24px;
}

.nav-left,
.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
}

.nav-bar button:not(.btn-add):not(.btn-gcal-reload) {
  padding: 6px 14px;
  border: 1px solid var(--nav-btn-border);
  background: var(--nav-btn-bg);
  color: var(--text-main);
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
}

.nav-bar button:not(.btn-add):not(.btn-gcal-reload):hover {
  background: var(--nav-btn-hover);
}

#nav-label {
  font-size: 1.1rem;
  font-weight: bold;
  min-width: 180px;
  text-align: center;
}

/* ---- Legend ---- */
.legend {
  display: flex;
  gap: 16px;
  padding: 0 24px 12px;
  flex-wrap: wrap;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
}

.legend-color {
  width: 12px;
  height: 12px;
  border-radius: 3px;
}

/* ---- Utility ---- */
.hidden {
  display: none !important;
}

/* ========================================
   Weekly View
   ======================================== */
#weekly-view {
  overflow-x: auto;
  margin: 0 24px 24px;
}

.weekly-grid {
  display: grid;
  grid-template-columns: 60px repeat(7, calc((100% - 60px) / 7));
  width: max(100%, 560px);
  border: 1px solid var(--grid-border);
  border-radius: 6px;
  background: var(--grid-bg);
  overflow: hidden;
}

.weekly-grid .corner {
  background: var(--header-cell-bg);
  border-bottom: 1px solid var(--grid-border);
  border-right: 1px solid var(--grid-border);
}

.weekly-grid .day-header {
  text-align: center;
  padding: 10px 4px;
  font-size: 0.8rem;
  font-weight: bold;
  background: var(--header-cell-bg);
  border-bottom: 1px solid var(--grid-border);
  border-right: 1px solid var(--grid-border);
}

.weekly-grid .day-header.today {
  background: var(--today-header-bg);
  color: var(--text-main);
}

.weekly-grid .day-header.sun {
  color: #e74c3c;
}

.weekly-grid .day-header.sat {
  color: #3498db;
}

.weekly-grid .allday-label {
  font-size: 0.7rem;
  font-weight: bold;
}

.weekly-grid .allday-cell {
  min-height: 24px;
  padding: 2px;
  border-bottom: 2px solid var(--grid-border);
}

.allday-block {
  position: static !important;
  display: block;
  height: auto !important;
  top: auto !important;
  margin-bottom: 2px;
  border-radius: 4px;
  padding: 1px 4px;
  font-size: 0.7rem;
  color: #fff;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  cursor: pointer;
}

.weekly-grid .time-label {
  font-size: 0.75rem;
  text-align: right;
  padding: 4px 6px 0 0;
  background: var(--time-label-bg);
  border-right: 1px solid var(--grid-border);
  border-bottom: 1px solid var(--grid-border-light);
  color: var(--time-label-color);
}

.weekly-grid .time-cell {
  position: relative;
  border-right: 1px solid var(--grid-border-light);
  border-bottom: 1px solid var(--grid-border-light);
  min-height: 48px;
}

.weekly-grid .time-cell.today-col {
  background: var(--today-col-bg);
}

.event-block {
  position: absolute;
  left: 2px;
  right: 2px; /* overridden by JS for overlapping events */
  border-radius: 4px;
  padding: 2px 4px;
  font-size: 0.7rem;
  color: #fff;
  overflow: hidden;
  cursor: pointer;
  z-index: 1;
  line-height: 1.3;
  transition: opacity 0.2s;
}

.event-block:hover {
  opacity: 0.85;
}

/* ========================================
   Monthly View
   ======================================== */
#monthly-view {
  overflow-x: auto;
  margin: 0 24px 24px;
}

.monthly-grid {
  display: grid;
  grid-template-columns: repeat(7, 14.2857%);
  width: max(100%, 490px);
  border: 1px solid var(--grid-border);
  border-radius: 6px;
  background: var(--grid-bg);
  overflow: hidden;
}

.monthly-grid .month-day-header {
  text-align: center;
  padding: 8px 4px;
  font-size: 0.8rem;
  font-weight: bold;
  background: var(--header-cell-bg);
  border-bottom: 1px solid var(--grid-border);
}

.monthly-grid .month-day-header.sun {
  color: #e74c3c;
}

.monthly-grid .month-day-header.sat {
  color: #3498db;
}

.monthly-grid .month-cell {
  min-height: 90px;
  border-right: 1px solid var(--grid-border-light);
  border-bottom: 1px solid var(--grid-border-light);
  padding: 4px;
}

.monthly-grid .month-cell.outside {
  background: var(--outside-cell-bg);
  color: var(--outside-cell-text);
}

.monthly-grid .month-cell.today {
  background: var(--today-cell-bg);
}

.month-cell .day-number {
  font-size: 0.8rem;
  font-weight: bold;
  margin-bottom: 4px;
}

.month-cell.today .day-number {
  display: inline-block;
  background: var(--today-badge-bg);
  color: #fff;
  width: 22px;
  height: 22px;
  line-height: 22px;
  text-align: center;
  border-radius: 50%;
}

.month-event {
  font-size: 0.7rem;
  padding: 2px 4px;
  margin-bottom: 2px;
  border-radius: 3px;
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: pointer;
  transition: opacity 0.2s;
}

.month-event:hover {
  opacity: 0.85;
}

/* ========================================
   Modal
   ======================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--modal-overlay-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal {
  background: var(--modal-bg);
  color: var(--text-main);
  border-radius: 8px;
  padding: 24px;
  max-width: 420px;
  width: 90%;
  position: relative;
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 16px;
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--modal-close-color);
}

.modal h2 {
  margin-bottom: 16px;
  font-size: 1.2rem;
}

.modal-detail {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.9rem;
}

.modal-detail .label {
  font-weight: bold;
  color: var(--label-color);
}

.modal-detail .category-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 12px;
  color: #fff;
  font-size: 0.8rem;
}

/* ---- GCal Reload Button ---- */
.btn-gcal-reload {
  padding: 6px 14px;
  background: #4285F4;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: bold;
  transition: background 0.2s;
}

.btn-gcal-reload:hover {
  background: #2a6fd6;
}

.btn-gcal-reload:disabled {
  background: #9ab5f5;
  cursor: not-allowed;
}

/* ---- Add Button ---- */
.btn-add {
  padding: 6px 20px;
  background: #27ae60;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: bold;
  transition: background 0.2s;
}

.btn-add:hover {
  background: #219a52;
}

/* ---- Modal Actions ---- */
.modal-actions {
  display: flex;
  gap: 8px;
  margin-top: 16px;
  justify-content: flex-end;
}

.btn-action {
  padding: 8px 18px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: bold;
  transition: background 0.2s;
}

.btn-edit {
  background: #3498db;
  color: #fff;
}

.btn-edit:hover {
  background: #2980b9;
}

.btn-delete {
  background: #e74c3c;
  color: #fff;
}

.btn-delete:hover {
  background: #c0392b;
}

.btn-save {
  background: #27ae60;
  color: #fff;
}

.btn-save:hover {
  background: #219a52;
}

.btn-cancel {
  background: #95a5a6;
  color: #fff;
}

.btn-cancel:hover {
  background: #7f8c8d;
}

/* ---- Edit Form Modal ---- */
.modal-edit {
  max-width: 480px;
}

.form-group {
  margin-bottom: 14px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: bold;
  color: var(--label-color);
  margin-bottom: 4px;
}

.form-group .required {
  color: #e74c3c;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--input-border);
  border-radius: 4px;
  font-size: 0.9rem;
  font-family: inherit;
  background: var(--input-bg);
  color: var(--input-text);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--input-focus-border);
  box-shadow: 0 0 0 2px var(--input-focus-shadow);
}

.form-row {
  display: flex;
  gap: 12px;
}

.form-row .form-group {
  flex: 1;
}

.form-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 8px;
}

/* ========================================
   Responsive
   ======================================== */
/* ========================================
   Google Calendar 連携
   ======================================== */
.btn-gcal-auth {
  display: inline-block;
  padding: 6px 14px;
  background: #4285F4;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: bold;
  text-decoration: none;
  transition: background 0.2s;
}

.btn-gcal-auth:hover {
  background: #2a6fd6;
}

.gcal-badge {
  display: inline-block;
  padding: 4px 10px;
  border: 1px solid #4285F4;
  color: #4285F4;
  border-radius: 12px;
  font-size: 0.8rem;
}

[data-theme="dark"] .gcal-badge {
  color: #7aabff;
  border-color: #7aabff;
}

.gcal-readonly-badge {
  display: inline-block;
  padding: 2px 8px;
  background: #e8f0fe;
  color: #1a73e8;
  border-radius: 4px;
  font-size: 0.78rem;
  font-weight: bold;
}

[data-theme="dark"] .gcal-readonly-badge {
  background: #1e3a6e;
  color: #7aabff;
}

.gcal-event {
  opacity: 0.92;
}

@media (max-width: 768px) {
  header {
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 16px;
    gap: 8px;
  }

  header h1 {
    font-size: 1.2rem;
  }

  .view-toggle {
    width: 100%;
    justify-content: flex-start;
  }

  .nav-bar {
    flex-wrap: wrap;
    padding: 10px 12px;
    gap: 8px;
  }

  .nav-left {
    flex: none;
    width: 100%;
    justify-content: flex-start;
    gap: 8px;
    flex-wrap: wrap;
  }

  #nav-label {
    font-size: 1rem;
    min-width: 140px;
  }

  .btn-add,
  .btn-gcal-reload {
    flex: 1;
    text-align: center;
    padding: 8px 12px;
  }

  #weekly-view {
    margin: 0 8px 16px;
  }

  .weekly-grid {
    font-size: 0.75rem;
  }

  .weekly-grid .day-header {
    padding: 6px 2px;
    font-size: 0.7rem;
  }

  .weekly-grid .time-label {
    font-size: 0.65rem;
  }

  .event-block {
    font-size: 0.6rem;
  }

  #monthly-view {
    margin: 0 8px 16px;
  }

  .monthly-grid .month-cell {
    min-height: 60px;
    padding: 2px;
  }

  .month-event {
    font-size: 0.6rem;
  }

  .legend {
    padding: 0 12px 8px;
    gap: 10px;
  }

  .modal {
    width: 95%;
    padding: 20px 16px;
    max-height: 90vh;
    overflow-y: auto;
  }

  .modal-edit {
    max-width: 95%;
  }

  .form-row {
    flex-direction: column;
    gap: 0;
  }
}

@media (max-width: 480px) {
  header {
    padding: 10px 12px;
  }

  .nav-bar {
    padding: 8px 8px;
  }

  .nav-left {
    gap: 4px;
  }

  .nav-bar button:not(.btn-add):not(.btn-gcal-reload) {
    padding: 6px 10px;
    font-size: 0.8rem;
  }

  #nav-label {
    font-size: 0.9rem;
    min-width: 100px;
  }

  .weekly-grid {
    grid-template-columns: 44px repeat(7, calc((100% - 44px) / 7));
  }

  .weekly-grid .time-label {
    font-size: 0.6rem;
    padding: 4px 3px 0 0;
  }

  .monthly-grid .month-day-header {
    font-size: 0.7rem;
    padding: 6px 2px;
  }

  .monthly-grid .month-cell {
    min-height: 48px;
    padding: 2px;
  }

  .month-cell .day-number {
    font-size: 0.7rem;
  }

  .modal {
    width: 100%;
    border-radius: 12px 12px 0 0;
    position: fixed;
    bottom: 0;
    left: 0;
    max-height: 85vh;
    overflow-y: auto;
  }

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