diff --git a/viewer/static/css/old_styles.css b/viewer/static/css/old_styles.css
deleted file mode 100644
index 8c9f165..0000000
--- a/viewer/static/css/old_styles.css
+++ /dev/null
@@ -1,128 +0,0 @@
-/****************************************************************************
- * Specific elements.                                                       *
- ****************************************************************************/
-
-html {
-    height:100%;
-}
-
-body {
-    height: 100%;
-    margin: 0px;
-}
-
-#id_username {
-width: 100%;
-}
-
-#id_password {
-width: 100%;
-}
-
-a:link {
-    color: #ffff00;
-}
-
-a:visited {
-    color: #009CD9;
-}
-
-/****************************************************************************
- * Containers.                                                              *
- ****************************************************************************/
-
-.centered-container {
-    width: 100%;
-    text-align: center;
-    margin-bottom: 0.5em;
-}
-
-.background {
-    background-color: darkslategray;
-    color: lightgray;
-}
-
-.image-container {
-    max-width: 900px;
-    max-height: 600px;
-}
-
-.fc {
-    width: fit-content;
-}
-
-.h90 {
-    height: 90%;
-}
-
-.full-width {
-    width: 100%;
-}
-
-.fixed-width {
-    width: 300px;
-}
-
-/****************************************************************************
- * Content.                                                                 *
- ****************************************************************************/
-
-.image {
-    max-width: 100%;
-    max-height: 600px;
-    width: auto;
-}
-
-.mauto {
-    margin: auto;
-}
-
-.mauto-top {
-    margin: 200px auto;
-}
-
-.navigation-icon {
-    width: 100px;
-}
-
-.small-nav-icon {
-    width: 3em;
-}
-
-.mb-2 {
-    margin-bottom: 2em;
-}
-
-.mr-2 {
-    margin-right: 2em;
-}
-
-.ml-4 {
-    margin-left: 4em;
-}
-
-.ml-2 {
-    margin-left: 2em;
-}
-
-.clear-btn {
-    border: none;
-    background-color: #00000000;
-}
-
-.search-box {
-    height: 2.5em;
-}
-
-.float-right {
-    float: right;
-}
-
-/****************************************************************************
- * Grid.                                                                    *
- ****************************************************************************/
-
-.column {
-    text-align: center;
-    border: black 1px solid;
-}
diff --git a/viewer/static/css/styles.css b/viewer/static/css/styles.css
index d1c31fa..8b6ba31 100644
--- a/viewer/static/css/styles.css
+++ b/viewer/static/css/styles.css
@@ -378,7 +378,16 @@ body.theme-dark .small.text-muted {
     background: transparent;
 }
 
-@media (max-width: 991.98px) {
+.login-form {
+    background: var(--panel-strong);
+    border-radius: 0 1rem 1rem 0;
+}
+
+.card {
+    background: var(--bg);
+}
+
+media (max-width: 991.98px) {
     .app-shell {
         padding: 0px;
         gap: 12px;
@@ -405,6 +414,12 @@ body.theme-dark .small.text-muted {
         padding-right: 16px;
     }
 }
+@media (max-width: 767px) {
+    .login-form {
+        background: var(--panel-strong);
+        border-radius: 1rem 1rem 1rem 1rem;
+    }
+}
 
 @media (max-width: 575.98px) {
     /* On narrow viewports keep the fixed 128px thumbnails but allow the
diff --git a/viewer/static/imgs/back.png b/viewer/static/imgs/back.png
deleted file mode 100755
index 39c58b3..0000000
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diff --git a/viewer/static/imgs/boot.png b/viewer/static/imgs/boot.png
deleted file mode 100755
index d32bd98..0000000
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diff --git a/viewer/static/imgs/find.png b/viewer/static/imgs/find.png
deleted file mode 100755
index 6be3b37..0000000
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diff --git a/viewer/static/imgs/folder-pictures.png b/viewer/static/imgs/folder-pictures.png
deleted file mode 100755
index 591b529..0000000
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diff --git a/viewer/static/imgs/forward.png b/viewer/static/imgs/forward.png
deleted file mode 100755
index 89a0627..0000000
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diff --git a/viewer/static/imgs/gohome.png b/viewer/static/imgs/gohome.png
deleted file mode 100755
index 7936733..0000000
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diff --git a/viewer/static/imgs/login.jpg b/viewer/static/imgs/login.jpg
new file mode 100644
index 0000000..eb5f547
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diff --git a/viewer/static/imgs/login.png b/viewer/static/imgs/login.png
new file mode 100644
index 0000000..0ce0078
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diff --git a/viewer/static/imgs/logo.png b/viewer/static/imgs/logo.png
new file mode 100644
index 0000000..b49ca59
Binary files /dev/null and b/viewer/static/imgs/logo.png differ
diff --git a/viewer/static/imgs/pattern.png b/viewer/static/imgs/pattern.png
deleted file mode 100644
index 728e142..0000000
Binary files a/viewer/static/imgs/pattern.png and /dev/null differ
diff --git a/viewer/templates/registration/login.html b/viewer/templates/registration/login.html
index 11744e0..25963ba 100644
--- a/viewer/templates/registration/login.html
+++ b/viewer/templates/registration/login.html
@@ -1,43 +1,74 @@
-{% load static %}
+{% load static form_tags %}
 <!DOCTYPE html>
-<html>
+<html lang="en">
     <head>
-        <meta name="viewport" content="width=device-width, height=device-height" />
-        <title>
-            NibasaViewer login
-        </title>
-        <link href="{% static 'css/old_styles.css' %}" rel="stylesheet">
+        <meta charset="utf-8">
+        <meta name="viewport" content="width=device-width, initial-scale=1">
+        <title>NibasaViewer — Login</title>
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" integrity="sha384-QWTKZyjpPEjISv5WaRU9OFeRpok6YctnYmDr5pNlyT2bRjXh0JMhjY6hW+ALEwIH" crossorigin="anonymous">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/7.0.0/css/all.min.css" crossorigin="anonymous" referrerpolicy="no-referrer">
+        <link href="{% static 'css/styles.css' %}" rel="stylesheet">
     </head>
-    <body class="background">
-        <div class="fixed-width mauto-top">
-            <form method="post" action="{% url 'login' %}" class="full-width">
-                {% csrf_token %}
-                <table class="full-width">
-                    <tr>
-                        <td>
-                            {{ form.username.label_tag }}
-                        </td>
-                        <td>
-                            {{ form.username }}
-                        </td>
-                    </tr>
-                    <tr>
-                        <td>
-                            {{ form.password.label_tag }}
-                        </td>
-                        <td>
-                            {{ form.password }}
-                        </td>
-                    </tr>
-                    <tr>
-                        <td colspan="2">
-                            <input type="submit" value="login" class="float-right">
+    <body class="theme-{{ theme|default:'dark' }}">
+
+        <section class="vh-100">
+          <div class="container py-5 h-100">
+            <div class="row d-flex justify-content-center align-items-center h-100">
+              <div class="col col-xl-10">
+                <div class="card shadow" style="border-radius: 1rem;">
+                  <div class="row g-0">
+                    <div class="col-md-6 col-lg-5 d-none d-md-block">
+                      <img src="{% static 'imgs/login.jpg' %}"
+                        alt="login image" class="img-fluid" style="height:100%; object-fit:cover; border-radius: 1rem 0 0 1rem;" />
+                    </div>
+                    <div class="col-md-6 col-lg-7 d-flex align-items-center">
+                      <div class="card-body p-4 p-lg-5 text-black h-100 login-form">
+
+                        <form method="post" action="{% url 'login' %}" class="w-100">
+                          {% csrf_token %}
+                          {% if form.non_field_errors %}
+                            <div class="alert alert-danger">{{ form.non_field_errors }}</div>
+                          {% endif %}
+
+                          <div class="d-flex align-items-center mb-3 pb-1">
+                            <img src="{% static 'imgs/logo.png' %}" alt="Logo" style="width:44px; height:44px; object-fit:contain;" class="me-3">
+                            <span class="h1 fw-bold mb-0 text-light">Nibasa Viewer</span>
+                          </div>
+
+                          <h5 class="fw-normal mb-1 mt-4 pb-3" style="letter-spacing: 1px; color:var(--muted);">Sign in</h5>
+
+                          <div class="mb-4">
+                            {% render_field form.username class="form-control form-control-lg" placeholder="User name" autocomplete="username" %}
+                            {% if form.username.errors %}
+                              <div class="text-danger small mt-1">{{ form.username.errors|striptags }}</div>
+                            {% endif %}
+                          </div>
+
+                          <div class="mb-4">
+                            {% render_field form.password class="form-control form-control-lg" placeholder="Password" autocomplete="current-password" %}
+                            {% if form.password.errors %}
+                              <div class="text-danger small mt-1">{{ form.password.errors|striptags }}</div>
+                            {% endif %}
+                          </div>
+
+                          <div class="pt-1 mb-4">
+                            <button class="btn btn-dark btn-lg btn-block w-100" type="submit">LOGIN</button>
+                          </div>
+
+                          {% if next %}
                             <input type="hidden" name="next" value="{{ next }}">
-                        </td>
-                    </tr>
-                </table>
-            </form>
-        </div>
+                          {% endif %}
+                        </form>
+
+                      </div>
+                    </div>
+                  </div>
+                </div>
+              </div>
+            </div>
+          </div>
+        </section>
+
+        <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js" integrity="sha384-YvpcrYf0tY3lHB60NNkmXc5s9fDVZLESaAA55NDzOxhy9GkcIdslK1eN7N6jIeHz" crossorigin="anonymous"></script>
     </body>
 </html>
-
diff --git a/viewer/templatetags/__init__.py b/viewer/templatetags/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/viewer/templatetags/form_tags.py b/viewer/templatetags/form_tags.py
new file mode 100644
index 0000000..16f4f71
--- /dev/null
+++ b/viewer/templatetags/form_tags.py
@@ -0,0 +1,33 @@
+from django import template
+from django.utils.safestring import mark_safe
+
+register = template.Library()
+
+
+@register.simple_tag
+def render_field(field, **attrs):
+    """Render a bound field with temporary widget attributes.
+
+    Usage in template:
+      {% render_field form.username class="form-control" placeholder="Email" %}
+
+    This updates the widget attrs just for the duration of rendering and
+    restores the original attrs afterwards to avoid side effects.
+    """
+    try:
+        widget = field.field.widget
+    except Exception:
+        return ""
+
+    # preserve original attrs and update temporarily
+    original_attrs = widget.attrs.copy()
+    # Convert all attr values to strings (template passes them as strings)
+    for k, v in attrs.items():
+        widget.attrs[str(k)] = str(v)
+
+    rendered = field.as_widget()
+
+    # restore original attrs
+    widget.attrs = original_attrs
+
+    return mark_safe(rendered)