:root {
  --bg: #16171d;
  --surface: #1e1f27;
  --border: #2e2f3a;
  --text: #edeef4;
  --text-muted: #9497a6;
  --accent: #3B82F6;
  --accent-hover: #2f6fd6;
  --danger: #e0503c;
  --radius: 10px;
  --shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.hidden { display: none !important; }

.screen.hidden { display: none; }
#identityScreen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.identity-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px;
  width: 100%;
  max-width: 420px;
  text-align: center;
}

.identity-card h1 {
  margin-top: 0;
  font-size: 1.4rem;
}

.identity-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 20px;
}

.identity-option {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg);
  cursor: pointer;
  font-size: 1rem;
  color: var(--text);
  transition: transform 0.1s ease, border-color 0.15s ease;
}

.identity-option:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.identity-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  flex-shrink: 0;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 20px;
  text-align: left;
}

.login-form p#loginAs {
  margin: 0;
  font-weight: 600;
  text-align: center;
}

.login-form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.login-form input {
  font-family: inherit;
  font-size: 0.95rem;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
}

.login-actions {
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

/* App screen */
#appScreen {
  max-width: 1320px;
  margin: 0 auto;
  padding: 16px 20px 60px;
}

.app-layout {
  display: flex;
  align-items: stretch;
  gap: 20px;
}

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

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0 16px;
}

.topbar h1 {
  font-size: 1.3rem;
  margin: 0;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.identity-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: 0.9rem;
}

.identity-pill::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--pill-color, var(--accent));
}

.link-btn {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font-size: 0.9rem;
  padding: 4px;
}

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.nav-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  width: 34px;
  height: 34px;
  font-size: 1.1rem;
  cursor: pointer;
  color: var(--text);
}

.today-btn, .secondary-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 14px;
  cursor: pointer;
  color: var(--text);
  font-size: 0.9rem;
}

.month-label {
  font-size: 1.15rem;
  margin: 0;
  text-transform: capitalize;
  flex: 1;
  text-align: center;
  min-width: 160px;
}

.primary-btn {
  background: var(--accent);
  border: none;
  border-radius: 8px;
  padding: 9px 16px;
  color: white;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
}

.primary-btn:hover { background: var(--accent-hover); }

.danger-btn {
  background: none;
  border: 1px solid var(--danger);
  color: var(--danger);
  border-radius: 8px;
  padding: 8px 14px;
  cursor: pointer;
  font-size: 0.9rem;
}

.weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
  margin-bottom: 6px;
}

.weekdays div {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
  padding: 4px 0;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
}

.day-cell {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  min-height: 100px;
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  transition: border-color 0.15s ease;
}

.day-cell:hover { border-color: var(--accent); }

.day-cell.outside { opacity: 0.4; }

.day-cell.today {
  border-color: var(--accent);
  border-width: 2px;
}

.day-cell.selected {
  background: color-mix(in srgb, var(--accent) 16%, var(--surface));
}

.day-number {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.day-cell.today .day-number { color: var(--accent); }

.event-pill {
  font-size: 0.72rem;
  padding: 2px 6px;
  border-radius: 5px;
  color: var(--surface);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.event-more {
  font-size: 0.7rem;
  color: var(--text-muted);
  padding: 0 2px;
}

/* Day panel */
.day-panel {
  width: 320px;
  flex-shrink: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  position: sticky;
  top: 16px;
  display: flex;
  flex-direction: column;
}

.day-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 14px;
}

.day-panel-header h2 {
  font-size: 1rem;
  margin: 0;
  text-transform: capitalize;
}

.day-panel-add-btn {
  position: relative;
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: var(--accent);
  cursor: pointer;
  padding: 0;
}

.day-panel-add-btn:hover { background: var(--accent-hover); }

.day-panel-add-btn::before,
.day-panel-add-btn::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: white;
  transform: translate(-50%, -50%);
  border-radius: 1px;
}

.day-panel-add-btn::before {
  width: 16px;
  height: 2px;
}

.day-panel-add-btn::after {
  width: 2px;
  height: 16px;
}

.day-panel-list {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow-y: auto;
}

.day-panel-section-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin: 10px 0 0;
}

.day-panel-section-title:first-child { margin-top: 0; }

.day-panel-empty {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0;
}

.day-panel-item {
  position: relative;
  display: flex;
  gap: 10px;
  text-align: left;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px 8px 13px;
  cursor: pointer;
  font-family: inherit;
  color: var(--text);
  overflow: hidden;
}

.day-panel-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--item-accent, var(--accent));
}

.day-panel-item:hover { border-color: var(--accent); }

.day-panel-item-time {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.day-panel-item-time-end {
  align-self: flex-end;
}

.day-panel-item-title {
  font-size: 0.9rem;
  font-weight: 500;
}

.day-panel-item-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 2px;
  white-space: pre-wrap;
}

.day-panel-item-member {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.day-panel-item-member-name {
  font-weight: 700;
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 100;
}

.modal {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 26px;
  width: 100%;
  max-width: 460px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal h2 {
  margin-top: 0;
  font-size: 1.2rem;
}

#eventForm {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

#eventForm label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text-muted);
  flex: 1;
}

#eventForm input,
#eventForm select,
#eventForm textarea {
  font-family: inherit;
  font-size: 0.95rem;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
}

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

.member-checkboxes {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.member-checkbox {
  display: flex;
  align-items: center;
  padding: 6px 14px;
  border-radius: 999px;
  border: 2px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 0.85rem;
  cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease, color 0.15s ease;
}

.member-checkbox:hover {
  background: var(--surface);
}

.member-checkbox:has(input:checked) {
  border-color: var(--member-color, var(--accent));
  font-weight: 600;
}

.member-checkbox input {
  position: absolute;
  width: 0;
  height: 0;
  opacity: 0;
}

.member-checkbox:has(input:focus-visible) {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.form-error {
  color: var(--danger);
  font-size: 0.85rem;
  margin: 0;
}

.modal-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 6px;
}

.modal-actions-right {
  display: flex;
  gap: 10px;
  margin-left: auto;
}

@media (max-width: 900px) {
  .app-layout { flex-direction: column; }
  .day-panel { width: 100%; position: static; }
}

@media (max-width: 640px) {
  .field-row { flex-direction: column; }
  .day-cell { min-height: 76px; }
  .toolbar { justify-content: center; }
  .month-label { order: -1; width: 100%; }
}