style(next): restyle modals

src/public/stylesheets/theme-next-dark.css

@@ -90,8 +90,18 @@
     --menu-item-delimiter-color: #ffffff1c;
     --menu-item-group-header-color: #ffffff91;
 
-    --modal-background-color: #333;
-    --modal-backdrop-color: #444;
+    --modal-backdrop-color: #000;
+    --modal-shadow-color: rgba(0, 0, 0, .5);
+    --modal-border-color: #444;
+    --modal-background-color: #262626;
+    --modal-title-color: gray;
+    --modal-control-button-background: #ffffff2b;
+    --modal-control-button-color: #cbcbcb;
+    --modal-control-button-hover-color: white;
+    --modal-control-button-hover-background: var(--hover-item-background-color);
+    --modal-close-button-hover-background: var(--tab-close-button-hover-background);
+    --modal-footer-background: #ffffff08;
+    --modal-footer-color: #ffffff7a;
 
     --quick-search-background: #ffffff12;
     --quick-search-color: #ffffff52;
@@ -210,7 +220,3 @@ body .CodeMirror {
 body .todo-list input[type="checkbox"]:not(:checked):before {
     border-color: var(--muted-text-color) !important;
 }
-
-.btn-close {
-    filter: invert(1);
-}

src/public/stylesheets/theme-next-light.css

@@ -84,8 +84,18 @@
     --menu-item-delimiter-color: #00000030;
     --menu-item-group-header-color: #00000061;
 
+    --modal-backdrop-color: #7c7c7c;
+    --modal-shadow-color: #00000033;
+    --modal-border-color: #797979;
     --modal-background-color: white;
-    --modal-backdrop-color: black;
+    --modal-title-color: gray;
+    --modal-control-button-background: #0000001a;
+    --modal-control-button-color: #737373;
+    --modal-control-button-hover-color: white;
+    --modal-control-button-hover-background: gray;
+    --modal-close-button-hover-background: var(--tab-close-button-hover-background);
+    --modal-footer-background: #00000008;
+    --modal-footer-color: #00000085;
 
     --quick-search-background: #00000012;
     --quick-search-color: #06060682;

src/public/stylesheets/theme-next/base.css

@@ -63,6 +63,8 @@
     --icon-button-size: 32px;
     --icon-button-icon-ratio: 0.65;
 
+    --modal-control-button-size: 22px;
+
     /* Theme capabilities */
     --tab-note-icons: true;
 }

src/public/stylesheets/theme-next/shell.css

@@ -2021,3 +2021,92 @@ div.promoted-attribute-cell .multiplicity:has(span) {
     margin-right: calc(var(--pa-card-padding-left) - var(--pa-card-padding-right));
     font-size: 0; /* Prevent whitespaces creating a gap between buttons */
 }
+
+/*
+ * Modals
+ */
+
+/* Modal body */
+.modal .modal-content {
+    box-shadow: 0 .5em 3em .5em var(--modal-shadow-color);
+    border: 1px solid var(--modal-border-color);
+}
+
+/* Modal header */
+.modal .modal-header {
+    border-bottom: unset;
+    user-select: none;
+}
+
+.modal .modal-header .modal-title {
+    flex-grow: 1;
+    font-size: 1.2em;
+    color: var(--modal-title-color);
+}
+
+/* Modal control buttons (close and help) */
+
+.modal .modal-header .btn-close,
+.modal .modal-header .help-button {
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    margin-left: 8px;
+    border: 0;
+    border-radius: 50%;
+    padding: 0;
+    width: var(--modal-control-button-size);
+    height: var(--modal-control-button-size);
+    background: var(--modal-control-button-background);
+    font-size: var(--modal-control-button-size);
+    line-height: normal;
+    font-weight: normal;
+    color: var(--modal-control-button-color);
+    opacity: 1;
+    cursor: default;
+}
+
+.modal .modal-header .btn-close {
+    --modal-control-button-hover-background: var(--modal-close-button-hover-background);
+}
+
+.modal .modal-header .btn-close::after {
+    content: "\ec8d";
+    font-family: boxicons;
+}
+
+.modal .modal-header .help-button {
+    margin-right: 0;
+    font-size: calc(var(--modal-control-button-size) * .75);
+    font-family: unset;
+    font-weight: bold;
+}
+
+.modal .modal-header .btn-close:hover,
+.modal .modal-header .help-button:hover {
+    background: var(--modal-control-button-hover-background);
+    color: var(--modal-control-button-hover-color);
+}
+
+.modal .modal-header .btn-close:active,
+.modal .modal-header .help-button:active {
+    transform: scale(.85);
+}
+
+.modal .modal-header .btn-close:focus,
+.modal .modal-header .help-button:focus {
+    box-shadow: none !important;
+}
+
+.modal .modal-header .btn-close:focus-visible,
+.modal .modal-header .help-button:focus-visible {
+    outline: 2px solid var(--input-focus-outline-color);
+    outline-offset: 2px;
+}
+
+/* Modal footer */
+.modal .modal-footer {
+    background: var(--modal-footer-background);
+    color: var(--modal-footer-color);
+    border-top: unset;
+}