From 3386e7158cb0904a77a0979e515e6948cb433af7 Mon Sep 17 00:00:00 2001
From: nsfisis <nsfisis@gmail.com>
Date: Sat, 2 May 2026 00:15:48 +0900
Subject: feat(slides): align slide controller center

---
 services/nuldoc/lib/nuldoc/pages/slide_page.rb      |  6 ++++--
 services/nuldoc/public/slides/slides.css            | 21 ++++++++++-----------
 .../slides/2023-01-18/phpstudy-tokyo-148/index.html |  6 +++---
 .../slides/2023-02-15/phpstudy-tokyo-149/index.html |  6 +++---
 .../slides/2023-03-15/phpstudy-tokyo-150/index.html |  6 +++---
 .../slides/2023-03-24/phperkaigi-2023/index.html    |  6 +++---
 .../2023-03-25/phperkaigi-2023-tokens/index.html    |  6 +++---
 .../slides/2023-04-12/phpstudy-tokyo-151/index.html |  6 +++---
 .../slides/2023-06-21/phpstudy-tokyo-153/index.html |  6 +++---
 .../slides/2023-06-23/phpconfuk-2023-eve/index.html |  6 +++---
 .../slides/2023-07-26/phpstudy-tokyo-154/index.html |  6 +++---
 .../slides/2023-08-24/phpstudy-tokyo-155/index.html |  6 +++---
 .../slides/2023-10-25/phpstudy-tokyo-157/index.html |  6 +++---
 .../slides/2024-01-24/phpstudy-tokyo-160/index.html |  6 +++---
 .../slides/2024-03-08/phperkaigi-2024/index.html    |  6 +++---
 .../slides/slides/2024-03-15/ya8-2024/index.html    |  6 +++---
 .../2024-04-13/phpcon-odawara-2024/index.html       |  6 +++---
 .../slides/2024-04-25/phpstudy-tokyo-163/index.html |  6 +++---
 .../slides/2024-07-18/phpstudy-tokyo-166/index.html |  6 +++---
 .../slides/2024-10-30/phpstudy-tokyo-169/index.html |  6 +++---
 .../slides/slides/2024-11-30/cohackpp/index.html    |  6 +++---
 .../slides/2025-02-22/phpcon-nagoya-2025/index.html |  6 +++---
 .../slides/2025-03-23/phperkaigi-2025/index.html    |  6 +++---
 .../2025-04-12/phpcon-odawara-2025/index.html       |  6 +++---
 .../slides/2025-07-26/techramen-25-conf/index.html  |  6 +++---
 .../slides/2025-10-29/phpstudy-tokyo-180/index.html |  6 +++---
 .../slides/2025-11-24/phpconkagawa-2025/index.html  |  6 +++---
 .../phperkaigi-2026-book-revue/index.html           |  6 +++---
 .../slides/2026-03-22/phperkaigi-2026/index.html    |  6 +++---
 .../2026-04-11/phpcon-odawara-2026/index.html       |  6 +++---
 services/nuldoc/static/slides/slides.css            | 21 ++++++++++-----------
 31 files changed, 108 insertions(+), 108 deletions(-)

(limited to 'services')

diff --git a/services/nuldoc/lib/nuldoc/pages/slide_page.rb b/services/nuldoc/lib/nuldoc/pages/slide_page.rb
index 5d7371c6..f58be386 100644
--- a/services/nuldoc/lib/nuldoc/pages/slide_page.rb
+++ b/services/nuldoc/lib/nuldoc/pages/slide_page.rb
@@ -52,13 +52,15 @@ module Nuldoc
                     end
                     div class: 'controllers' do
                       div class: 'controllers-buttons' do
-                        button id: 'prev', type: 'button' do
+                        button id: 'prev', type: 'button',
+                               'aria-label': '前のページ (←/h)', title: '前のページ (←/h)' do
                           elem 'svg', width: '20', height: '20', viewBox: '0 0 24 24', fill: 'none',
                                       stroke: 'currentColor', 'stroke-width': '2' do
                             elem 'path', d: 'M15 18l-6-6 6-6'
                           end
                         end
-                        button id: 'next', type: 'button' do
+                        button id: 'next', type: 'button',
+                               'aria-label': '次のページ (→/l)', title: '次のページ (→/l)' do
                           elem 'svg', width: '20', height: '20', viewBox: '0 0 24 24', fill: 'none',
                                       stroke: 'currentColor', 'stroke-width': '2' do
                             elem 'path', d: 'M9 18l6-6-6-6'
diff --git a/services/nuldoc/public/slides/slides.css b/services/nuldoc/public/slides/slides.css
index 2c92dc55..17a9e183 100644
--- a/services/nuldoc/public/slides/slides.css
+++ b/services/nuldoc/public/slides/slides.css
@@ -1,7 +1,15 @@
+main {
+  max-width: unset;
+  margin: 2rem;
+}
+
+.slide-container {
+  margin: 0 1rem;
+}
+
 .controllers {
   display: flex;
-  flex-direction: column;
-  align-items: end;
+  justify-content: center;
   margin: 1rem 0;
 }
 
@@ -27,12 +35,3 @@
 .controllers button:hover {
   background: #555;
 }
-
-main {
-  max-width: unset;
-  margin: 2rem;
-}
-
-.slide-container {
-  margin: 0 1rem;
-}
diff --git a/services/nuldoc/public/slides/slides/2023-01-18/phpstudy-tokyo-148/index.html b/services/nuldoc/public/slides/slides/2023-01-18/phpstudy-tokyo-148/index.html
index 61f9292e..e40fb43d 100644
--- a/services/nuldoc/public/slides/slides/2023-01-18/phpstudy-tokyo-148/index.html
+++ b/services/nuldoc/public/slides/slides/2023-01-18/phpstudy-tokyo-148/index.html
@@ -18,7 +18,7 @@
     <link rel="stylesheet" href="/style.css?h=c3724e2d900f13528c82005e79a8ec23">
   </head>
   <body class="single">
-    <link rel="stylesheet" href="/slides.css?h=439ab4bc2a67451d90853ddfc17d1d25">
+    <link rel="stylesheet" href="/slides.css?h=48ccba536579d1291e7c04ae27851b57">
     <header class="header">
       <div class="site-logo">
         <a href="https://nsfisis.dev/">nsfisis.dev</a>
@@ -65,13 +65,13 @@
           </div>
           <div class="controllers">
             <div class="controllers-buttons">
-              <button id="prev" type="button">
+              <button aria-label="前のページ (←/h)" id="prev" title="前のページ (←/h)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M15 18l-6-6 6-6">
                   </path>
                 </svg>
               </button>
-              <button id="next" type="button">
+              <button aria-label="次のページ (→/l)" id="next" title="次のページ (→/l)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M9 18l6-6-6-6">
                   </path>
diff --git a/services/nuldoc/public/slides/slides/2023-02-15/phpstudy-tokyo-149/index.html b/services/nuldoc/public/slides/slides/2023-02-15/phpstudy-tokyo-149/index.html
index 0792d451..22971518 100644
--- a/services/nuldoc/public/slides/slides/2023-02-15/phpstudy-tokyo-149/index.html
+++ b/services/nuldoc/public/slides/slides/2023-02-15/phpstudy-tokyo-149/index.html
@@ -18,7 +18,7 @@
     <link rel="stylesheet" href="/style.css?h=c3724e2d900f13528c82005e79a8ec23">
   </head>
   <body class="single">
-    <link rel="stylesheet" href="/slides.css?h=439ab4bc2a67451d90853ddfc17d1d25">
+    <link rel="stylesheet" href="/slides.css?h=48ccba536579d1291e7c04ae27851b57">
     <header class="header">
       <div class="site-logo">
         <a href="https://nsfisis.dev/">nsfisis.dev</a>
@@ -65,13 +65,13 @@
           </div>
           <div class="controllers">
             <div class="controllers-buttons">
-              <button id="prev" type="button">
+              <button aria-label="前のページ (←/h)" id="prev" title="前のページ (←/h)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M15 18l-6-6 6-6">
                   </path>
                 </svg>
               </button>
-              <button id="next" type="button">
+              <button aria-label="次のページ (→/l)" id="next" title="次のページ (→/l)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M9 18l6-6-6-6">
                   </path>
diff --git a/services/nuldoc/public/slides/slides/2023-03-15/phpstudy-tokyo-150/index.html b/services/nuldoc/public/slides/slides/2023-03-15/phpstudy-tokyo-150/index.html
index b42584fd..4f029dcd 100644
--- a/services/nuldoc/public/slides/slides/2023-03-15/phpstudy-tokyo-150/index.html
+++ b/services/nuldoc/public/slides/slides/2023-03-15/phpstudy-tokyo-150/index.html
@@ -18,7 +18,7 @@
     <link rel="stylesheet" href="/style.css?h=c3724e2d900f13528c82005e79a8ec23">
   </head>
   <body class="single">
-    <link rel="stylesheet" href="/slides.css?h=439ab4bc2a67451d90853ddfc17d1d25">
+    <link rel="stylesheet" href="/slides.css?h=48ccba536579d1291e7c04ae27851b57">
     <header class="header">
       <div class="site-logo">
         <a href="https://nsfisis.dev/">nsfisis.dev</a>
@@ -68,13 +68,13 @@
           </div>
           <div class="controllers">
             <div class="controllers-buttons">
-              <button id="prev" type="button">
+              <button aria-label="前のページ (←/h)" id="prev" title="前のページ (←/h)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M15 18l-6-6 6-6">
                   </path>
                 </svg>
               </button>
-              <button id="next" type="button">
+              <button aria-label="次のページ (→/l)" id="next" title="次のページ (→/l)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M9 18l6-6-6-6">
                   </path>
diff --git a/services/nuldoc/public/slides/slides/2023-03-24/phperkaigi-2023/index.html b/services/nuldoc/public/slides/slides/2023-03-24/phperkaigi-2023/index.html
index 24174597..3fe540b2 100644
--- a/services/nuldoc/public/slides/slides/2023-03-24/phperkaigi-2023/index.html
+++ b/services/nuldoc/public/slides/slides/2023-03-24/phperkaigi-2023/index.html
@@ -18,7 +18,7 @@
     <link rel="stylesheet" href="/style.css?h=c3724e2d900f13528c82005e79a8ec23">
   </head>
   <body class="single">
-    <link rel="stylesheet" href="/slides.css?h=439ab4bc2a67451d90853ddfc17d1d25">
+    <link rel="stylesheet" href="/slides.css?h=48ccba536579d1291e7c04ae27851b57">
     <header class="header">
       <div class="site-logo">
         <a href="https://nsfisis.dev/">nsfisis.dev</a>
@@ -68,13 +68,13 @@
           </div>
           <div class="controllers">
             <div class="controllers-buttons">
-              <button id="prev" type="button">
+              <button aria-label="前のページ (←/h)" id="prev" title="前のページ (←/h)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M15 18l-6-6 6-6">
                   </path>
                 </svg>
               </button>
-              <button id="next" type="button">
+              <button aria-label="次のページ (→/l)" id="next" title="次のページ (→/l)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M9 18l6-6-6-6">
                   </path>
diff --git a/services/nuldoc/public/slides/slides/2023-03-25/phperkaigi-2023-tokens/index.html b/services/nuldoc/public/slides/slides/2023-03-25/phperkaigi-2023-tokens/index.html
index d75d5bff..84801544 100644
--- a/services/nuldoc/public/slides/slides/2023-03-25/phperkaigi-2023-tokens/index.html
+++ b/services/nuldoc/public/slides/slides/2023-03-25/phperkaigi-2023-tokens/index.html
@@ -18,7 +18,7 @@
     <link rel="stylesheet" href="/style.css?h=c3724e2d900f13528c82005e79a8ec23">
   </head>
   <body class="single">
-    <link rel="stylesheet" href="/slides.css?h=439ab4bc2a67451d90853ddfc17d1d25">
+    <link rel="stylesheet" href="/slides.css?h=48ccba536579d1291e7c04ae27851b57">
     <header class="header">
       <div class="site-logo">
         <a href="https://nsfisis.dev/">nsfisis.dev</a>
@@ -68,13 +68,13 @@
           </div>
           <div class="controllers">
             <div class="controllers-buttons">
-              <button id="prev" type="button">
+              <button aria-label="前のページ (←/h)" id="prev" title="前のページ (←/h)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M15 18l-6-6 6-6">
                   </path>
                 </svg>
               </button>
-              <button id="next" type="button">
+              <button aria-label="次のページ (→/l)" id="next" title="次のページ (→/l)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M9 18l6-6-6-6">
                   </path>
diff --git a/services/nuldoc/public/slides/slides/2023-04-12/phpstudy-tokyo-151/index.html b/services/nuldoc/public/slides/slides/2023-04-12/phpstudy-tokyo-151/index.html
index 03e85eee..78435373 100644
--- a/services/nuldoc/public/slides/slides/2023-04-12/phpstudy-tokyo-151/index.html
+++ b/services/nuldoc/public/slides/slides/2023-04-12/phpstudy-tokyo-151/index.html
@@ -18,7 +18,7 @@
     <link rel="stylesheet" href="/style.css?h=c3724e2d900f13528c82005e79a8ec23">
   </head>
   <body class="single">
-    <link rel="stylesheet" href="/slides.css?h=439ab4bc2a67451d90853ddfc17d1d25">
+    <link rel="stylesheet" href="/slides.css?h=48ccba536579d1291e7c04ae27851b57">
     <header class="header">
       <div class="site-logo">
         <a href="https://nsfisis.dev/">nsfisis.dev</a>
@@ -65,13 +65,13 @@
           </div>
           <div class="controllers">
             <div class="controllers-buttons">
-              <button id="prev" type="button">
+              <button aria-label="前のページ (←/h)" id="prev" title="前のページ (←/h)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M15 18l-6-6 6-6">
                   </path>
                 </svg>
               </button>
-              <button id="next" type="button">
+              <button aria-label="次のページ (→/l)" id="next" title="次のページ (→/l)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M9 18l6-6-6-6">
                   </path>
diff --git a/services/nuldoc/public/slides/slides/2023-06-21/phpstudy-tokyo-153/index.html b/services/nuldoc/public/slides/slides/2023-06-21/phpstudy-tokyo-153/index.html
index 6a308188..646a9d55 100644
--- a/services/nuldoc/public/slides/slides/2023-06-21/phpstudy-tokyo-153/index.html
+++ b/services/nuldoc/public/slides/slides/2023-06-21/phpstudy-tokyo-153/index.html
@@ -18,7 +18,7 @@
     <link rel="stylesheet" href="/style.css?h=c3724e2d900f13528c82005e79a8ec23">
   </head>
   <body class="single">
-    <link rel="stylesheet" href="/slides.css?h=439ab4bc2a67451d90853ddfc17d1d25">
+    <link rel="stylesheet" href="/slides.css?h=48ccba536579d1291e7c04ae27851b57">
     <header class="header">
       <div class="site-logo">
         <a href="https://nsfisis.dev/">nsfisis.dev</a>
@@ -65,13 +65,13 @@
           </div>
           <div class="controllers">
             <div class="controllers-buttons">
-              <button id="prev" type="button">
+              <button aria-label="前のページ (←/h)" id="prev" title="前のページ (←/h)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M15 18l-6-6 6-6">
                   </path>
                 </svg>
               </button>
-              <button id="next" type="button">
+              <button aria-label="次のページ (→/l)" id="next" title="次のページ (→/l)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M9 18l6-6-6-6">
                   </path>
diff --git a/services/nuldoc/public/slides/slides/2023-06-23/phpconfuk-2023-eve/index.html b/services/nuldoc/public/slides/slides/2023-06-23/phpconfuk-2023-eve/index.html
index 58969e6e..06723abf 100644
--- a/services/nuldoc/public/slides/slides/2023-06-23/phpconfuk-2023-eve/index.html
+++ b/services/nuldoc/public/slides/slides/2023-06-23/phpconfuk-2023-eve/index.html
@@ -18,7 +18,7 @@
     <link rel="stylesheet" href="/style.css?h=c3724e2d900f13528c82005e79a8ec23">
   </head>
   <body class="single">
-    <link rel="stylesheet" href="/slides.css?h=439ab4bc2a67451d90853ddfc17d1d25">
+    <link rel="stylesheet" href="/slides.css?h=48ccba536579d1291e7c04ae27851b57">
     <header class="header">
       <div class="site-logo">
         <a href="https://nsfisis.dev/">nsfisis.dev</a>
@@ -65,13 +65,13 @@
           </div>
           <div class="controllers">
             <div class="controllers-buttons">
-              <button id="prev" type="button">
+              <button aria-label="前のページ (←/h)" id="prev" title="前のページ (←/h)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M15 18l-6-6 6-6">
                   </path>
                 </svg>
               </button>
-              <button id="next" type="button">
+              <button aria-label="次のページ (→/l)" id="next" title="次のページ (→/l)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M9 18l6-6-6-6">
                   </path>
diff --git a/services/nuldoc/public/slides/slides/2023-07-26/phpstudy-tokyo-154/index.html b/services/nuldoc/public/slides/slides/2023-07-26/phpstudy-tokyo-154/index.html
index 17ae771c..ffdf1765 100644
--- a/services/nuldoc/public/slides/slides/2023-07-26/phpstudy-tokyo-154/index.html
+++ b/services/nuldoc/public/slides/slides/2023-07-26/phpstudy-tokyo-154/index.html
@@ -18,7 +18,7 @@
     <link rel="stylesheet" href="/style.css?h=c3724e2d900f13528c82005e79a8ec23">
   </head>
   <body class="single">
-    <link rel="stylesheet" href="/slides.css?h=439ab4bc2a67451d90853ddfc17d1d25">
+    <link rel="stylesheet" href="/slides.css?h=48ccba536579d1291e7c04ae27851b57">
     <header class="header">
       <div class="site-logo">
         <a href="https://nsfisis.dev/">nsfisis.dev</a>
@@ -65,13 +65,13 @@
           </div>
           <div class="controllers">
             <div class="controllers-buttons">
-              <button id="prev" type="button">
+              <button aria-label="前のページ (←/h)" id="prev" title="前のページ (←/h)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M15 18l-6-6 6-6">
                   </path>
                 </svg>
               </button>
-              <button id="next" type="button">
+              <button aria-label="次のページ (→/l)" id="next" title="次のページ (→/l)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M9 18l6-6-6-6">
                   </path>
diff --git a/services/nuldoc/public/slides/slides/2023-08-24/phpstudy-tokyo-155/index.html b/services/nuldoc/public/slides/slides/2023-08-24/phpstudy-tokyo-155/index.html
index e3e0d498..25c9a13a 100644
--- a/services/nuldoc/public/slides/slides/2023-08-24/phpstudy-tokyo-155/index.html
+++ b/services/nuldoc/public/slides/slides/2023-08-24/phpstudy-tokyo-155/index.html
@@ -18,7 +18,7 @@
     <link rel="stylesheet" href="/style.css?h=c3724e2d900f13528c82005e79a8ec23">
   </head>
   <body class="single">
-    <link rel="stylesheet" href="/slides.css?h=439ab4bc2a67451d90853ddfc17d1d25">
+    <link rel="stylesheet" href="/slides.css?h=48ccba536579d1291e7c04ae27851b57">
     <header class="header">
       <div class="site-logo">
         <a href="https://nsfisis.dev/">nsfisis.dev</a>
@@ -65,13 +65,13 @@
           </div>
           <div class="controllers">
             <div class="controllers-buttons">
-              <button id="prev" type="button">
+              <button aria-label="前のページ (←/h)" id="prev" title="前のページ (←/h)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M15 18l-6-6 6-6">
                   </path>
                 </svg>
               </button>
-              <button id="next" type="button">
+              <button aria-label="次のページ (→/l)" id="next" title="次のページ (→/l)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M9 18l6-6-6-6">
                   </path>
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+              <button aria-label="次のページ (→/l)" id="next" title="次のページ (→/l)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M9 18l6-6-6-6">
                   </path>
diff --git a/services/nuldoc/public/slides/slides/2025-10-29/phpstudy-tokyo-180/index.html b/services/nuldoc/public/slides/slides/2025-10-29/phpstudy-tokyo-180/index.html
index d168bca1..59129020 100644
--- a/services/nuldoc/public/slides/slides/2025-10-29/phpstudy-tokyo-180/index.html
+++ b/services/nuldoc/public/slides/slides/2025-10-29/phpstudy-tokyo-180/index.html
@@ -18,7 +18,7 @@
     <link rel="stylesheet" href="/style.css?h=c3724e2d900f13528c82005e79a8ec23">
   </head>
   <body class="single">
-    <link rel="stylesheet" href="/slides.css?h=439ab4bc2a67451d90853ddfc17d1d25">
+    <link rel="stylesheet" href="/slides.css?h=48ccba536579d1291e7c04ae27851b57">
     <header class="header">
       <div class="site-logo">
         <a href="https://nsfisis.dev/">nsfisis.dev</a>
@@ -65,13 +65,13 @@
           </div>
           <div class="controllers">
             <div class="controllers-buttons">
-              <button id="prev" type="button">
+              <button aria-label="前のページ (←/h)" id="prev" title="前のページ (←/h)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M15 18l-6-6 6-6">
                   </path>
                 </svg>
               </button>
-              <button id="next" type="button">
+              <button aria-label="次のページ (→/l)" id="next" title="次のページ (→/l)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M9 18l6-6-6-6">
                   </path>
diff --git a/services/nuldoc/public/slides/slides/2025-11-24/phpconkagawa-2025/index.html b/services/nuldoc/public/slides/slides/2025-11-24/phpconkagawa-2025/index.html
index 05727626..abf5547c 100644
--- a/services/nuldoc/public/slides/slides/2025-11-24/phpconkagawa-2025/index.html
+++ b/services/nuldoc/public/slides/slides/2025-11-24/phpconkagawa-2025/index.html
@@ -18,7 +18,7 @@
     <link rel="stylesheet" href="/style.css?h=c3724e2d900f13528c82005e79a8ec23">
   </head>
   <body class="single">
-    <link rel="stylesheet" href="/slides.css?h=439ab4bc2a67451d90853ddfc17d1d25">
+    <link rel="stylesheet" href="/slides.css?h=48ccba536579d1291e7c04ae27851b57">
     <header class="header">
       <div class="site-logo">
         <a href="https://nsfisis.dev/">nsfisis.dev</a>
@@ -68,13 +68,13 @@
           </div>
           <div class="controllers">
             <div class="controllers-buttons">
-              <button id="prev" type="button">
+              <button aria-label="前のページ (←/h)" id="prev" title="前のページ (←/h)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M15 18l-6-6 6-6">
                   </path>
                 </svg>
               </button>
-              <button id="next" type="button">
+              <button aria-label="次のページ (→/l)" id="next" title="次のページ (→/l)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M9 18l6-6-6-6">
                   </path>
diff --git a/services/nuldoc/public/slides/slides/2026-03-21/phperkaigi-2026-book-revue/index.html b/services/nuldoc/public/slides/slides/2026-03-21/phperkaigi-2026-book-revue/index.html
index 63f56a8d..46c3d35b 100644
--- a/services/nuldoc/public/slides/slides/2026-03-21/phperkaigi-2026-book-revue/index.html
+++ b/services/nuldoc/public/slides/slides/2026-03-21/phperkaigi-2026-book-revue/index.html
@@ -18,7 +18,7 @@
     <link rel="stylesheet" href="/style.css?h=c3724e2d900f13528c82005e79a8ec23">
   </head>
   <body class="single">
-    <link rel="stylesheet" href="/slides.css?h=439ab4bc2a67451d90853ddfc17d1d25">
+    <link rel="stylesheet" href="/slides.css?h=48ccba536579d1291e7c04ae27851b57">
     <header class="header">
       <div class="site-logo">
         <a href="https://nsfisis.dev/">nsfisis.dev</a>
@@ -71,13 +71,13 @@
           </div>
           <div class="controllers">
             <div class="controllers-buttons">
-              <button id="prev" type="button">
+              <button aria-label="前のページ (←/h)" id="prev" title="前のページ (←/h)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M15 18l-6-6 6-6">
                   </path>
                 </svg>
               </button>
-              <button id="next" type="button">
+              <button aria-label="次のページ (→/l)" id="next" title="次のページ (→/l)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M9 18l6-6-6-6">
                   </path>
diff --git a/services/nuldoc/public/slides/slides/2026-03-22/phperkaigi-2026/index.html b/services/nuldoc/public/slides/slides/2026-03-22/phperkaigi-2026/index.html
index 4e96b253..cce368d7 100644
--- a/services/nuldoc/public/slides/slides/2026-03-22/phperkaigi-2026/index.html
+++ b/services/nuldoc/public/slides/slides/2026-03-22/phperkaigi-2026/index.html
@@ -18,7 +18,7 @@
     <link rel="stylesheet" href="/style.css?h=c3724e2d900f13528c82005e79a8ec23">
   </head>
   <body class="single">
-    <link rel="stylesheet" href="/slides.css?h=439ab4bc2a67451d90853ddfc17d1d25">
+    <link rel="stylesheet" href="/slides.css?h=48ccba536579d1291e7c04ae27851b57">
     <header class="header">
       <div class="site-logo">
         <a href="https://nsfisis.dev/">nsfisis.dev</a>
@@ -68,13 +68,13 @@
           </div>
           <div class="controllers">
             <div class="controllers-buttons">
-              <button id="prev" type="button">
+              <button aria-label="前のページ (←/h)" id="prev" title="前のページ (←/h)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M15 18l-6-6 6-6">
                   </path>
                 </svg>
               </button>
-              <button id="next" type="button">
+              <button aria-label="次のページ (→/l)" id="next" title="次のページ (→/l)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M9 18l6-6-6-6">
                   </path>
diff --git a/services/nuldoc/public/slides/slides/2026-04-11/phpcon-odawara-2026/index.html b/services/nuldoc/public/slides/slides/2026-04-11/phpcon-odawara-2026/index.html
index 37ed1fb5..26adae8e 100644
--- a/services/nuldoc/public/slides/slides/2026-04-11/phpcon-odawara-2026/index.html
+++ b/services/nuldoc/public/slides/slides/2026-04-11/phpcon-odawara-2026/index.html
@@ -18,7 +18,7 @@
     <link rel="stylesheet" href="/style.css?h=c3724e2d900f13528c82005e79a8ec23">
   </head>
   <body class="single">
-    <link rel="stylesheet" href="/slides.css?h=439ab4bc2a67451d90853ddfc17d1d25">
+    <link rel="stylesheet" href="/slides.css?h=48ccba536579d1291e7c04ae27851b57">
     <header class="header">
       <div class="site-logo">
         <a href="https://nsfisis.dev/">nsfisis.dev</a>
@@ -71,13 +71,13 @@
           </div>
           <div class="controllers">
             <div class="controllers-buttons">
-              <button id="prev" type="button">
+              <button aria-label="前のページ (←/h)" id="prev" title="前のページ (←/h)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M15 18l-6-6 6-6">
                   </path>
                 </svg>
               </button>
-              <button id="next" type="button">
+              <button aria-label="次のページ (→/l)" id="next" title="次のページ (→/l)" type="button">
                 <svg fill="none" height="20" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24" width="20">
                   <path d="M9 18l6-6-6-6">
                   </path>
diff --git a/services/nuldoc/static/slides/slides.css b/services/nuldoc/static/slides/slides.css
index 2c92dc55..17a9e183 100644
--- a/services/nuldoc/static/slides/slides.css
+++ b/services/nuldoc/static/slides/slides.css
@@ -1,7 +1,15 @@
+main {
+  max-width: unset;
+  margin: 2rem;
+}
+
+.slide-container {
+  margin: 0 1rem;
+}
+
 .controllers {
   display: flex;
-  flex-direction: column;
-  align-items: end;
+  justify-content: center;
   margin: 1rem 0;
 }
 
@@ -27,12 +35,3 @@
 .controllers button:hover {
   background: #555;
 }
-
-main {
-  max-width: unset;
-  margin: 2rem;
-}
-
-.slide-container {
-  margin: 0 1rem;
-}
-- 
cgit v1.3.1