diff --git a/pyproject.toml b/pyproject.toml
index 196a7d7..95a2c12 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "nature_recorder"
-version = "1.25.0"
+version = "1.26.0"
 description = "Wildlife sightings database"
 readme = "README.md"
 requires-python = ">=3.11"
diff --git a/src/naturerec_web/auth/templates/auth/login.html b/src/naturerec_web/auth/templates/auth/login.html
index 856f0cd..326a69a 100644
--- a/src/naturerec_web/auth/templates/auth/login.html
+++ b/src/naturerec_web/auth/templates/auth/login.html
@@ -1,17 +1,22 @@
 {% extends "layout.html" %}
 {% set suppress_menu = True %}
+{% block title %}Sign in{% endblock %}
 
 {% block content %}
     <form method="post">
         <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
-        <section class="vh-100" style="background-color: #fff;">
-            <div class="container py-5 h-100">
+        <section class="login-page">
+            <div class="container py-5">
                 <div class="row d-flex justify-content-center align-items-center h-100">
                     <div class="col-12 col-md-8 col-lg-6 col-xl-5">
-                        <div class="card shadow-lg" style="border-radius: 1rem;">
+                        <div class="login-brand">
+                            <span class="brand-mark" aria-hidden="true"><i class="fas fa-leaf"></i></span>
+                            <div><strong>Nature Recorder</strong><small>Wildlife observation database</small></div>
+                        </div>
+                        <div class="card login-card">
                             <div class="card-body p-5 text-center">
-
-                                <h3 class="mb-5">Sign in</h3>
+                                <p class="eyebrow">Welcome back</p>
+                                <h3 class="mb-4">Sign in to your records</h3>
 
                                 <div class="form-floating mb-4">
                                     {% include "error.html" with context%}
@@ -34,7 +39,7 @@ <h3 class="mb-5">Sign in</h3>
                                     <label class="form-check-label" for="remember">Remember password</label>
                                 </div>
 
-                                <button class="btn btn-primary btn-lg btn-block" type="submit">Login</button>
+                                <button class="btn btn-primary btn-lg w-100" type="submit">Sign in</button>
                             </div>
                         </div>
                     </div>
diff --git a/src/naturerec_web/static/css/site.css b/src/naturerec_web/static/css/site.css
index e999025..6748a29 100644
--- a/src/naturerec_web/static/css/site.css
+++ b/src/naturerec_web/static/css/site.css
@@ -1,150 +1,401 @@
-/* --- Body styling -----------------------------–––------------------------- */
+:root {
+  color-scheme: dark;
+  --bg: #07111f;
+  --surface: #0d1b2d;
+  --surface-2: #13243a;
+  --field: #081524;
+  --line: #213750;
+  --text: #eff6ff;
+  --muted: #8fa6be;
+  --cyan: #35d4d0;
+  --green: #4fdaa1;
+  --amber: #f8bd59;
+  --red: #ff7186;
+  --shadow: 0 22px 60px rgba(0, 0, 0, .18);
+}
+
+* { box-sizing: border-box; }
+
+html, body { min-height: 100%; }
+
 body {
-  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
-  color: #444;
+  margin: 0;
+  color: var(--text);
+  background: var(--bg);
+  background-image: radial-gradient(circle at 75% -20%, #16435a 0, transparent 38rem);
+  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
 }
 
+a { color: var(--cyan); }
+a:hover { color: #7ce8e4; }
+
 #main-content {
-    padding: 25px;
+  width: min(1500px, calc(100% - 40px));
+  min-height: calc(100vh - 73px);
+  margin: 0 auto;
+  padding: 42px 0 72px;
 }
 
 body h1 {
-  font-size: 1.25em;
-  margin-bottom: 15px;
+  margin: 0 0 28px;
+  color: var(--text);
+  font-size: clamp(2rem, 4vw, 3rem);
+  font-weight: 700;
+  line-height: 1;
+  letter-spacing: -.035em;
 }
 
-body h2 {
-  font-size: 1.15em;
+body h1::before {
+  display: block;
+  margin-bottom: 10px;
+  color: var(--cyan);
+  content: "Nature records";
+  font-size: 11px;
+  font-weight: 700;
+  letter-spacing: .15em;
+  text-transform: uppercase;
 }
 
-button > a {
-    text-decoration: none
-}
+body h2, body h3, body h4, body h5 { color: var(--text); }
 
-/* --- Forms & button bar --------------------------------------------------- */
-.form-group {
-    margin-bottom: 10px;
+/* Top bar */
+.app-topbar {
+  min-height: 73px;
+  padding: 0 clamp(20px, 4vw, 64px);
+  background: rgba(7, 17, 31, .86);
+  border-bottom: 1px solid var(--line);
+  backdrop-filter: blur(16px);
 }
 
-label {
-    font-weight: bold;
-}
+.app-topbar .container-fluid { padding: 0; }
 
-.button-bar {
-  border-top: 1px solid #D3D3D3;
-  margin-top: 25px;
-  padding-top: 10px;
-  padding-bottom: 10px;
+.brand {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 10px 0;
+  color: var(--text) !important;
 }
 
-.button-bar .btn-primary a:link {
-    color: white;
+.brand-mark {
+  display: grid;
+  flex: 0 0 38px;
+  width: 38px;
+  height: 38px;
+  place-items: center;
+  color: #06111c;
+  background: var(--cyan);
+  border-radius: 10px;
+  font-size: 19px;
+  transform: rotate(-10deg);
 }
 
-.button-bar .btn-primary a:visited {
-    color: white;
+.brand-copy strong, .brand-copy small, .login-brand strong, .login-brand small { display: block; }
+.brand-copy strong { font-size: 16px; }
+.brand-copy small, .login-brand small {
+  margin-top: 2px;
+  color: var(--muted);
+  font-size: 10px;
+  letter-spacing: .055em;
+  text-transform: uppercase;
 }
 
-.button-bar .btn-primary a:hover {
-    color: white;
-    text-decoration: none;
+.app-topbar .navbar-nav { margin-left: 34px; gap: 5px; }
+.app-topbar .nav-link {
+  padding: 26px 11px 23px !important;
+  color: var(--muted) !important;
+  border-bottom: 2px solid transparent;
+  font-size: 14px;
 }
-
-.button-bar .btn-primary a:active {
-    color: white;
+.app-topbar .nav-link:hover,
+.app-topbar .nav-link:focus,
+.app-topbar .nav-item.show > .nav-link {
+  color: var(--text) !important;
+  border-bottom-color: var(--cyan);
 }
-
-.button-bar .btn-light a:link {
-    color: black;
+.app-topbar .nav-logout { margin-left: 10px; }
+.app-topbar .nav-logout .nav-link { color: #c2d0de !important; }
+.navbar-toggler { border-color: var(--line); }
+
+.dropdown-menu {
+  padding: 7px;
+  color: var(--text);
+  background: var(--surface);
+  border: 1px solid var(--line);
+  border-radius: 9px;
+  box-shadow: var(--shadow);
+}
+.dropdown-item {
+  padding: 9px 11px;
+  color: var(--muted);
+  border-radius: 6px;
+  font-size: 13px;
+}
+.dropdown-item:hover, .dropdown-item:focus {
+  color: var(--text);
+  background: rgba(53, 212, 208, .09);
 }
 
-.button-bar .btn-light a:visited {
-    color: black;
+/* Forms */
+.form-group { max-width: 840px; margin-bottom: 18px; }
+label {
+  margin-bottom: 7px;
+  color: var(--muted);
+  font-size: 10px;
+  font-weight: 700;
+  letter-spacing: .07em;
+  text-transform: uppercase;
 }
 
-.button-bar .btn-light a:hover {
-    color: black;
-    text-decoration: none;
+.form-control, .form-select {
+  min-height: 42px;
+  padding: 9px 12px;
+  color: var(--text);
+  background-color: var(--field);
+  border: 1px solid var(--line);
+  border-radius: 7px;
+}
+.form-control:focus, .form-select:focus {
+  color: var(--text);
+  background-color: var(--field);
+  border-color: var(--cyan);
+  box-shadow: 0 0 0 3px rgba(53, 212, 208, .12);
+}
+.form-control::placeholder { color: #667f98; }
+.form-control:disabled, .form-control[readonly] { color: var(--muted); background: #0b1929; }
+select.form-control {
+  color-scheme: dark;
+  appearance: auto;
 }
+textarea.form-control { min-height: 120px; }
+.form-check { max-width: 840px; }
+.form-check-label {
+  color: var(--muted);
+  font-size: 12px;
+  letter-spacing: 0;
+  text-transform: none;
+}
+.form-check-input {
+  background-color: var(--field);
+  border-color: var(--line);
+}
+.form-check-input:checked { background-color: var(--cyan); border-color: var(--cyan); }
+.form-group.required .control-label::after { color: var(--red); content: "  *"; }
+.geocode { margin-left: 7px; color: var(--cyan); cursor: pointer; }
 
-.button-bar .btn-light a:active {
-    color: black;
+.filter-criteria {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 0 14px;
+  max-width: 1000px;
+  margin: 0 0 25px;
+  padding: 22px;
+  background: var(--surface);
+  border: 1px solid var(--line);
+  border-radius: 13px;
+  box-shadow: var(--shadow);
 }
+.filter-criteria .form-group { max-width: none; }
+.filter-criteria .button-bar { grid-column: 1 / -1; }
 
-/* --- Striped tables -----------------------------------–––----------------- */
-table.striped {
-    border: 1px solid grey;
+.button-bar {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 10px;
+  margin-top: 25px;
+  padding: 18px 0 10px;
+  border-top: 1px solid var(--line);
 }
+.button-bar .btn { margin: 0 !important; }
 
-table.striped tr:nth-child(even) {
-  background-color: #f2f2f2;
+.btn {
+  border-radius: 7px;
+  font-weight: 700;
+}
+.btn-primary {
+  color: #041316;
+  background: var(--cyan);
+  border-color: var(--cyan);
+}
+.btn-primary:hover, .btn-primary:focus {
+  color: #041316;
+  background: #64e1dd;
+  border-color: #64e1dd;
+}
+.btn-light, .btn-default {
+  color: var(--cyan);
+  background: rgba(53, 212, 208, .08);
+  border-color: rgba(53, 212, 208, .35);
+}
+.btn-light:hover, .btn-default:hover {
+  color: var(--text);
+  background: rgba(53, 212, 208, .15);
+  border-color: var(--cyan);
+}
+.btn-danger { background: #b83d47; border-color: #df626c; }
+.btn a, .btn a:link, .btn a:visited, .btn a:hover, .btn a:active {
+  color: inherit !important;
+  text-decoration: none;
 }
 
+/* Tables */
+div:has(> table.striped), form:has(> table.striped) { overflow-x: auto; }
+table.striped {
+  width: 100%;
+  margin-bottom: 20px;
+  overflow: hidden;
+  background: var(--surface);
+  border: 1px solid var(--line);
+  border-collapse: separate;
+  border-spacing: 0;
+  border-radius: 12px;
+  box-shadow: var(--shadow);
+  font-size: 12px;
+}
+table.striped thead { background: #0a1727; }
 table.striped th {
-    padding: 5px;
+  padding: 12px 13px;
+  color: var(--muted);
+  background: #0a1727;
+  border-bottom: 1px solid var(--line);
+  font-size: 9px;
+  letter-spacing: .055em;
+  text-align: left;
+  text-transform: uppercase;
+  white-space: nowrap;
 }
-
 table.striped td {
-    padding: 5px;
+  padding: 12px 13px;
+  color: var(--text);
+  background: transparent;
+  border: 0;
+  border-bottom: 1px solid rgba(33, 55, 80, .65);
+  vertical-align: middle;
 }
-
-div table.striped {
-    margin-bottom: 20px;
+table.striped tr:nth-child(even) { background: rgba(19, 36, 58, .45); }
+table.striped tbody tr { transition: background .15s; }
+table.striped tbody tr:hover { background: rgba(53, 212, 208, .07); }
+table.striped tbody tr:last-child td { border-bottom: 0; }
+table.striped td a {
+  display: inline-grid;
+  width: 34px;
+  height: 34px;
+  place-items: center;
+  color: var(--cyan);
+  background: rgba(53, 212, 208, .08);
+  border: 1px solid rgba(53, 212, 208, .3);
+  border-radius: 7px;
+  text-decoration: none;
 }
-
-.td-nowrap {
-    white-space: nowrap;
+table.striped td a:hover { background: rgba(53, 212, 208, .16); border-color: var(--cyan); }
+table.striped .fa-trash { color: var(--red); }
+.td-nowrap { white-space: nowrap; }
+.div-align-center { display: flex; justify-content: center; }
+
+/* Feedback and modals */
+div.error, div.message {
+  max-width: 1000px;
+  margin: 0 0 20px;
+  padding: 13px 16px;
+  border-radius: 9px;
+  font-size: 13px;
 }
-
-.div-align-center {
-    display: flex;
-    justify-content: center;
-}
-
-/* --- Messages -------------------------------------–––--------------------- */
-
 div.error {
-    margin-bottom: 10px;
-    padding: 5px;
-    border: 2px solid red;
-    background: pink;
-    color: red;
+  color: #ffd7dd;
+  background: rgba(255, 113, 134, .09);
+  border: 1px solid rgba(255, 113, 134, .3);
 }
-
 div.message {
-    margin-bottom: 10px;
-    padding: 5px;
-    border: 2px solid #007316;
-    background: #6bdb81;
-    color: #007316;
+  color: #bcf7de;
+  background: rgba(79, 218, 161, .09);
+  border: 1px solid rgba(79, 218, 161, .3);
 }
-
-/* --- Reporting and filtering sightings ----------------------------------- */
-
-.filter-criteria {
-    padding: 20px;
-    border: 1px solid #D3D3D3;
-    margin-bottom: 25px;
+span.message { color: inherit; }
+.modal-content {
+  color: var(--text);
+  background: var(--surface);
+  border: 1px solid var(--line);
+  border-radius: 13px;
+  box-shadow: 0 28px 90px rgba(0, 0, 0, .55);
 }
-
-/* --- Data Entry ---------------------------------------------------------- */
-
-.form-group.required .control-label:after {
-  content: "  *";
-  color: red;
+.modal-header, .modal-footer { border-color: var(--line); }
+.btn-close { filter: invert(1) grayscale(1); }
+
+/* Date picker */
+.datepicker-dropdown {
+  color: var(--text);
+  background: var(--surface);
+  border-color: var(--line);
 }
-
-.geocode {
-    color: #286090;
-    cursor: pointer;
+.datepicker table tr td.day:hover,
+.datepicker table tr td.focused { color: var(--text); background: var(--surface-2); }
+.datepicker table tr td.active.active { color: #041316; background: var(--cyan); }
+.datepicker table tr td.old, .datepicker table tr td.new { color: #5d738a; }
+
+/* Login */
+.login-page {
+  display: grid;
+  min-height: calc(100vh - 114px);
+  place-items: center;
+}
+.login-brand {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 13px;
+  margin-bottom: 22px;
+}
+.login-brand strong { color: var(--text); font-size: 20px; }
+.login-card {
+  color: var(--text);
+  background: linear-gradient(145deg, var(--surface-2), var(--surface));
+  border: 1px solid var(--line);
+  border-radius: 14px;
+  box-shadow: 0 28px 90px rgba(0, 0, 0, .42);
+}
+.login-card .eyebrow {
+  margin-bottom: 9px;
+  color: var(--cyan);
+  font-size: 10px;
+  font-weight: 700;
+  letter-spacing: .15em;
+  text-transform: uppercase;
+}
+.login-card h3 { font-size: 25px; letter-spacing: -.02em; }
+.login-card .form-floating label {
+  color: var(--muted);
+  font-size: 13px;
+  letter-spacing: 0;
+  text-transform: none;
+}
+.login-card .form-floating > .form-control:focus ~ label,
+.login-card .form-floating > .form-control:not(:placeholder-shown) ~ label { color: var(--muted); }
+
+.icon-blue { color: var(--cyan); }
+.icon-grey { color: var(--muted); }
+
+@media (max-width: 991.98px) {
+  .app-topbar { padding: 8px 20px; }
+  .app-topbar .navbar-nav { margin: 12px 0 4px; gap: 0; }
+  .app-topbar .nav-link { padding: 11px 4px !important; border-bottom: 0; border-left: 2px solid transparent; }
+  .app-topbar .nav-link:hover, .app-topbar .nav-link:focus, .app-topbar .nav-item.show > .nav-link {
+    padding-left: 12px !important;
+    border-left-color: var(--cyan);
+  }
+  .app-topbar .nav-logout { margin-left: 0; }
+  .dropdown-menu { box-shadow: none; }
 }
 
-/* --- Icons --------------------------------------------------------------- */
-
-.icon-blue {
-    color: #0c6efd;
+@media (max-width: 700px) {
+  #main-content { width: min(100% - 28px, 1500px); padding-top: 30px; }
+  .filter-criteria { grid-template-columns: 1fr; padding: 16px; }
+  .filter-criteria .button-bar { grid-column: 1; }
+  .button-bar { align-items: stretch; flex-direction: column-reverse; }
+  .button-bar .btn { width: 100%; }
+  body h1 { font-size: 2rem; }
+  .login-card .card-body { padding: 28px !important; }
 }
 
-.icon-grey {
-    color: grey;
-}
\ No newline at end of file
+@media (prefers-reduced-motion: reduce) {
+  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
+}
diff --git a/src/naturerec_web/templates/layout.html b/src/naturerec_web/templates/layout.html
index 3f162ba..c0041d0 100644
--- a/src/naturerec_web/templates/layout.html
+++ b/src/naturerec_web/templates/layout.html
@@ -3,20 +3,20 @@
 <head>
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1">
-    <title>{% block title %}{% endblock %}</title>
-    <link rel="stylesheet" href="{{ url_for('static', filename='css/site.css') }}">
+    <title>{% block title %}Nature Recorder{% endblock %} · Nature Recorder</title>
     <link rel="stylesheet" href="{{ url_for('static', filename='bootstrap/css/bootstrap.min.css') }}">
     <link rel="stylesheet" href="{{ url_for('static', filename='bootstrap-datepicker/dist/css/bootstrap-datepicker.min.css') }}">
     <link rel="stylesheet" href="{{ url_for('static', filename='fontawesome/css/all.css') }}">
+    <link rel="stylesheet" href="{{ url_for('static', filename='css/site.css') }}">
 </head>
 <body>
     {% if not suppress_menu %}
         {% include "menu.html" with context %}
     {% endif %}
-    <div id="main-content" class="container-fluid">
+    <main id="main-content">
         {% block content %}
         {% endblock %}
-    </div>
+    </main>
     <script src="{{ url_for('static', filename='script/jquery-3.6.0.min.js') }}"></script>
     <script src="{{ url_for('static', filename='bootstrap/js/bootstrap.bundle.min.js') }}"></script>
     <script src="{{ url_for('static', filename='bootstrap-datepicker/dist/js/bootstrap-datepicker.min.js') }}"></script>
diff --git a/src/naturerec_web/templates/menu.html b/src/naturerec_web/templates/menu.html
index 407a150..ff29dad 100644
--- a/src/naturerec_web/templates/menu.html
+++ b/src/naturerec_web/templates/menu.html
@@ -1,6 +1,12 @@
-<nav class="navbar navbar-expand-lg navbar-dark bg-dark">
-  <div class="container-fluid">
-    <a class="navbar-brand" href="{{ url_for('home.home') }}">Nature Recorder</a>
+<nav class="navbar navbar-expand-lg navbar-dark app-topbar">
+  <div class="container-fluid">
+    <a class="navbar-brand brand" href="{{ url_for('home.home') }}" aria-label="Nature Recorder home">
+      <span class="brand-mark" aria-hidden="true"><i class="fas fa-leaf"></i></span>
+      <span class="brand-copy">
+        <strong>Nature Recorder</strong>
+        <small>Wildlife observation database</small>
+      </span>
+    </a>
     <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarSupportedContent"
             aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
       <span class="navbar-toggler-icon"></span>
@@ -47,10 +53,10 @@
             <a class="nav-link" href="{{ url_for('jobs.list_recent') }}">Jobs</a>
           </li>
         {% endif %}
-        <li class="nav-item">
-          <a class="nav-link" href="{{ url_for('auth.logout') }}">Logout</a>
+        <li class="nav-item nav-logout">
+          <a class="nav-link" href="{{ url_for('auth.logout') }}"><i class="fas fa-sign-out-alt" aria-hidden="true"></i> Logout</a>
         </li>
       </ul>
     </div>
   </div>
-</nav>
\ No newline at end of file
+</nav>