Add admin activity management

public/admin.css

@@ -93,6 +93,29 @@
   gap: 32px;
 }
 
+.admin-nav {
+  display: flex;
+  gap: 8px;
+  padding-bottom: 8px;
+  border-bottom: 1px solid #dfcdbd;
+}
+
+.admin-nav-btn {
+  padding: 10px 16px;
+  border: 1px solid transparent;
+  border-radius: 6px;
+  background: transparent;
+  color: var(--color-text-light);
+  font: inherit;
+  font-weight: 700;
+  cursor: pointer;
+}
+
+.admin-nav-btn.is-active,
+.admin-nav-btn:hover { border-color: #cfbba9; background: #fffefa; color: var(--color-rose-dark); }
+
+.admin-panel { display: grid; gap: 32px; }
+
 .admin-header,
 .dates-heading {
   display: flex;
@@ -347,4 +370,80 @@
     grid-column: 2;
     grid-row: 1 / span 2;
   }
+}
+
+.activity-form {
+  display: grid;
+  gap: 12px;
+  max-width: 560px;
+  margin-top: 20px;
+}
+
+.activity-form > label:not(.toggle-label),
+.icon-picker legend {
+  color: var(--color-text);
+  font-family: var(--font-heading);
+  font-size: 0.92rem;
+  font-weight: 700;
+}
+
+.activity-form > input[type="text"] {
+  min-height: 46px;
+  padding: 10px 12px;
+  border: 1px solid #cfbba9;
+  border-radius: 6px;
+  background: #fffefa;
+  color: var(--color-text);
+  font: inherit;
+}
+
+.activity-form > input[type="text"]:focus { outline: 3px solid rgba(224, 87, 126, 0.28); outline-offset: 1px; border-color: var(--color-rose); }
+.icon-picker { margin: 4px 0 0; padding: 0; border: 0; }
+.icon-picker legend { margin-bottom: 8px; }
+.icon-options { display: flex; flex-wrap: wrap; gap: 8px; }
+.icon-option { width: 42px; height: 42px; padding: 0; border: 1px solid #cfbba9; border-radius: 6px; background: #fffefa; font-size: 1.35rem; cursor: pointer; }
+.icon-option.is-selected { border-color: var(--color-rose-dark); background: var(--color-rose-light); box-shadow: inset 0 0 0 2px var(--color-rose-dark); }
+.toggle-label { display: flex; align-items: center; gap: 8px; margin-top: 4px; cursor: pointer; }
+.toggle-label input { width: 18px; height: 18px; accent-color: var(--color-rose-dark); }
+.form-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 4px; }
+.btn-secondary { border: 1px solid #cfbba9; background: #fffefa; color: var(--color-text); }
+
+.activities-list { display: grid; gap: 10px; margin: 18px 0 0; padding: 0; list-style: none; }
+.activity-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 12px 0; border-bottom: 1px solid #e5d8ce; }
+.activity-row.is-disabled { opacity: 0.58; }
+.activity-add-row { margin-top: 18px; padding: 10px 0; border-top: 1px dashed #cfbba9; border-bottom: 1px solid #e5d8ce; }
+.activity-add-identity { flex: 1; }
+.activity-name-input { min-width: 0; width: 100%; border: 0; border-bottom: 1px solid #cfbba9; background: transparent; color: var(--color-text); font: inherit; font-family: var(--font-heading); font-weight: 700; outline: 0; }
+.activity-name-input:focus { border-color: var(--color-rose-dark); box-shadow: 0 2px 0 var(--color-rose-light); }
+.activity-name-input::placeholder { color: var(--color-text-light); font-weight: 600; }
+.activity-identity { position: relative; display: grid; grid-template-columns: 36px minmax(0, 1fr); align-items: center; column-gap: 10px; min-width: 0; }
+.activity-row-icon { grid-row: span 2; width: 38px; height: 38px; padding: 0; border: 1px solid transparent; border-radius: 50%; background: transparent; color: var(--color-text); font-size: 1.5rem; line-height: 1; text-align: center; cursor: pointer; }
+.activity-row-icon:hover, .activity-row-icon:focus-visible { border-color: #cfbba9; background: #fffefa; }
+.activity-row-icon:disabled { cursor: not-allowed; opacity: 0.55; }
+.activity-row-name { font-family: var(--font-heading); font-weight: 700; overflow-wrap: anywhere; }
+.activity-identity small { color: var(--color-text-light); }
+.activity-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 6px; }
+.row-action { width: 36px; height: 36px; padding: 0; border: 1px solid #cfbba9; border-radius: 5px; background: #fffefa; color: var(--color-text); font: inherit; font-size: 1.05rem; line-height: 1; cursor: pointer; }
+.row-action:hover, .row-action:focus-visible { border-color: var(--color-rose-dark); color: var(--color-rose-dark); }
+.row-action:disabled { opacity: 0.35; cursor: not-allowed; }
+.type-action { display: inline-flex; align-items: center; justify-content: center; border-radius: 50%; }
+.duration-indicator { display: block; width: 18px; height: 18px; border-radius: 50%; }
+.type-action.is-short .duration-indicator { background: linear-gradient(90deg, var(--color-rose) 0 50%, var(--color-rose-light) 50%); }
+.type-action.is-long .duration-indicator { background: var(--color-rose-dark); }
+.type-action.is-short { color: var(--color-rose); }
+.type-action.is-long { color: var(--color-rose-dark); }
+.row-action.is-danger { border-color: #c84a62; color: #a83049; }
+
+.activity-icon-picker { position: absolute; z-index: 5; top: 44px; left: 0; display: grid; grid-template-columns: repeat(6, 48px); gap: 8px; width: 352px; padding: 12px; border: 1px solid #cfbba9; border-radius: 8px; background: #fffefa; box-shadow: 0 12px 24px rgba(74, 44, 61, 0.18); }
+.activity-icon-picker.hidden { display: none; }
+.activity-icon-picker .icon-option { width: 48px; height: 48px; font-size: 1.65rem; }
+.activity-add-picker { top: 52px; }
+
+@media (max-width: 560px) {
+  .activity-row { align-items: flex-start; flex-direction: column; }
+  .activity-actions { justify-content: flex-start; }
+}
+
+@media (max-width: 400px) {
+  .activity-icon-picker { grid-template-columns: repeat(5, 48px); width: 296px; }
 }