Vastly overhaul admin UI

Admin UI now has the ability to edit links that exist. Deleting items is
more accessible and asks for a confirmation before deleting. Link and
Category names as well as link descriptions now have a length limit
(todo: make it configurable?). Small bug fixes related to image saving
are also included in this commit.

src/styles/main.scss

@@ -0,0 +1,135 @@
+@import "tailwindcss";
+
+
+@theme {
+    --color-accent: oklch(57.93% 0.258 294.12);
+    --color-success: oklch(70.19% 0.158 160.44);
+    --color-error: oklch(53% 0.251 28.48);
+
+    --color-base: oklch(11% .007 285);
+    --color-surface: oklch(19% 0.007 285.66);
+    --color-overlay: oklch(26% 0.008 285.66);
+
+    --color-muted: oklch(63% 0.015 286);
+    --color-subtle: oklch(72% 0.015 286);
+    --color-text: oklch(87% 0.015 286);
+
+    --color-highlight-sm: oklch(30.67% 0.007 286);
+    --color-highlight: oklch(39.26% 0.010 286);
+    --color-highlight-lg: oklch(47.72% 0.011 286);
+}
+
+@font-face {
+    font-family: "Instrument Sans";
+    src: url("/assets/fonts/InstrumentSans-VariableFont_wdth,wght.woff2") format("woff2");
+    font-display: swap;
+}
+
+:root {
+    --default-font-family: "Instrument Sans", ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
+}
+
+html {
+    line-height: normal;
+    color-scheme: dark;
+    color: var(--color-text);
+}
+
+h1,
+h2,
+h3,
+h4,
+h5,
+h6 {
+    @apply font-semibold;
+}
+
+h1 {
+    font-size: clamp(42px, 10vw, 64px);
+}
+
+h2 {
+    font-size: clamp(30px, 6vw, 36px);
+}
+
+h3 {
+    font-size: 1.25rem;
+}
+
+button {
+    cursor: pointer;
+}
+
+input:not(.search) {
+    @apply px-4 py-2 rounded-md w-full bg-surface border border-highlight/70 placeholder:text-highlight text-text focus-visible:outline-none transition-colors duration-300 ease-out overflow-hidden;
+    
+    &[type="file"] {
+        @apply p-0 cursor-pointer;
+
+        &::file-selector-button {
+            @apply px-2 py-2 mr-1 bg-highlight text-subtle cursor-pointer;
+        }
+    }
+}
+
+.link-card {
+    background: var(--color-overlay);
+    display: flex;
+    flex-direction: row;
+    text-decoration: none;
+    border-radius: 1rem;
+    padding: 0.625rem;
+    align-items: center;
+    transition-property: box-shadow, transform, translate;
+    transition-duration: 150ms;
+    transition-timing-function: cubic-bezier(0.45, 0, 0.55, 1);
+    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
+
+    &:not(.admin) {
+        &:hover {
+            box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
+            transform: translateY(-4px);
+        }
+
+        &:active {
+            box-shadow: 0 2px 4px -2px rgb(0 0 0 / 0.1);
+            transform: translateY(2px);
+        }
+    }
+}
+
+@media (prefers-reduced-motion: reduce) {
+    .link-card {
+        transition: none;
+
+        &:hover {
+            transform: none;
+        }
+
+        &:active {
+            transform: none;
+        }
+    }
+}
+
+/* Div that holds the image */
+.link-card div:has(img):first-child {
+    flex-shrink: 0;
+    margin-right: 0.5rem;
+}
+
+.link-card div:first-child img {
+    user-select: none;
+    border-radius: 0.375rem;
+    aspect-ratio: 1/1;
+    object-fit: cover;
+}
+
+/* Div that holds the text */
+.link-card div:nth-child(2) {
+    word-break: break-all;
+}
+
+.link-card div:nth-child(2) p {
+    color: var(--color-subtle);
+}