Add Hugo link page with Sveltia CMS admin

Content lives in data/profile.yaml and is edited as structured fields through Sveltia at /admin/, so the page is never hand-written HTML. The CMS bundle is vendored at a pinned version instead of loaded from unpkg, and the admin assets ship with the built site, so hosting and builds stay self-contained. PKCE sign-in activates once a Gitea OAuth application client ID is added to static/admin/config.yml.

assets/css/main.css

@@ -0,0 +1,167 @@
+*,
+*::before,
+*::after {
+  box-sizing: border-box;
+}
+
+:root {
+  color-scheme: light dark;
+  --bg: #f5f6f8;
+  --glow: radial-gradient(900px 480px at 50% -12%, #dfe7f5 0%, rgba(223, 231, 245, 0) 62%);
+  --card: #ffffff;
+  --fg: #111318;
+  --muted: #5b6472;
+  --border: #e2e6ed;
+  --border-strong: #c9d0db;
+  --hover: #f3f6fb;
+  --accent: #2563eb;
+  --shadow: 0 18px 40px -18px rgba(16, 24, 40, 0.18);
+}
+
+@media (prefers-color-scheme: dark) {
+  :root {
+    --bg: #0b0d11;
+    --glow: radial-gradient(900px 480px at 50% -12%, #16202f 0%, rgba(22, 32, 47, 0) 62%);
+    --card: #11141a;
+    --fg: #e9ecf1;
+    --muted: #98a1ae;
+    --border: #232936;
+    --border-strong: #384152;
+    --hover: #171c26;
+    --accent: #6f9bff;
+    --shadow: 0 18px 40px -18px rgba(0, 0, 0, 0.55);
+  }
+}
+
+html {
+  -webkit-text-size-adjust: 100%;
+}
+
+body {
+  margin: 0;
+  min-height: 100dvh;
+  display: grid;
+  place-items: center;
+  padding: 32px 20px;
+  background: var(--glow), var(--bg);
+  color: var(--fg);
+  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
+  line-height: 1.5;
+  -webkit-font-smoothing: antialiased;
+}
+
+.card {
+  width: 100%;
+  max-width: 540px;
+  padding: 44px 36px 32px;
+  background: var(--card);
+  border: 1px solid var(--border);
+  border-radius: 22px;
+  box-shadow: var(--shadow);
+}
+
+.identity {
+  text-align: center;
+}
+
+.avatar {
+  width: 88px;
+  height: 88px;
+  border-radius: 50%;
+  object-fit: cover;
+  display: inline-block;
+  border: 1px solid var(--border-strong);
+  box-shadow: 0 4px 14px -6px rgba(16, 24, 40, 0.3);
+}
+
+.avatar--fallback {
+  display: inline-grid;
+  place-items: center;
+  font-size: 1.6rem;
+  font-weight: 600;
+  letter-spacing: 0.04em;
+  color: #ffffff;
+  background: linear-gradient(145deg, #3b5bdb, #1f3a8a);
+}
+
+h1 {
+  margin: 18px 0 0;
+  font-size: clamp(1.35rem, 1.1rem + 1vw, 1.6rem);
+  font-weight: 650;
+  letter-spacing: -0.015em;
+}
+
+.tagline {
+  margin: 8px auto 0;
+  max-width: 42ch;
+  color: var(--muted);
+  font-size: 0.95rem;
+  text-wrap: balance;
+}
+
+.links {
+  display: grid;
+  gap: 10px;
+  margin-top: 30px;
+}
+
+.link {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 10px;
+  padding: 14px 18px;
+  border: 1px solid var(--border);
+  border-radius: 14px;
+  color: inherit;
+  text-decoration: none;
+  font-size: 0.95rem;
+  font-weight: 550;
+  transition: background-color 0.16s ease, border-color 0.16s ease, transform 0.16s ease;
+}
+
+.link:hover {
+  background: var(--hover);
+  border-color: var(--border-strong);
+  transform: translateY(-1px);
+}
+
+.link:active {
+  transform: translateY(0);
+}
+
+.link:focus-visible {
+  outline: 2px solid var(--accent);
+  outline-offset: 2px;
+}
+
+.link__icon {
+  display: inline-flex;
+  flex: none;
+}
+
+.link__icon svg {
+  width: 19px;
+  height: 19px;
+  display: block;
+}
+
+.footer {
+  margin-top: 30px;
+  text-align: center;
+  color: var(--muted);
+  font-size: 0.8rem;
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .link {
+    transition: none;
+  }
+}
+
+@media (max-width: 480px) {
+  .card {
+    padding: 34px 20px 26px;
+    border-radius: 18px;
+  }
+}