From c19cb176235cdf32ec01da0a2e69bef8bbaed4c4 Mon Sep 17 00:00:00 2001
From: elpatron <m.busche@gmail.com>
Date: Fri, 1 Aug 2025 13:49:02 +0200
Subject: [PATCH] =?UTF-8?q?v1.3.12:=20Verbesserte=20Farbkontraste=20f?=
 =?UTF-8?q?=C3=BCr=20bessere=20Barrierefreiheit?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 app.py                  |   2 +-
 h origin main --no-edit | 324 ++++++++++++++++++++++++++++++++++++++++
 templates/index.html    |  69 ++++-----
 3 files changed, 360 insertions(+), 35 deletions(-)
 create mode 100644 h origin main --no-edit

diff --git a/app.py b/app.py
index 9979319..8cbc6c1 100644
--- a/app.py
+++ b/app.py
@@ -12,7 +12,7 @@ app = Flask(__name__)
 app.secret_key = os.environ.get('SECRET_KEY', 'dev-key')
 
 # Version der App
-APP_VERSION = "1.3.11"
+APP_VERSION = "1.3.12"
 
 # HTML-Template wird jetzt aus templates/index.html geladen
 
diff --git a/h origin main --no-edit b/h origin main --no-edit
new file mode 100644
index 0000000..74570f6
--- /dev/null
+++ b/h origin main --no-edit	
@@ -0,0 +1,324 @@
+
+                   SSUUMMMMAARRYY OOFF LLEESSSS CCOOMMMMAANNDDSS
+
+      Commands marked with * may be preceded by a number, _N.
+      Notes in parentheses indicate the behavior if _N is given.
+      A key preceded by a caret indicates the Ctrl key; thus ^K is ctrl-K.
+
+  h  H                 Display this help.
+  q  :q  Q  :Q  ZZ     Exit.
+ ---------------------------------------------------------------------------
+
+                           MMOOVVIINNGG
+
+  e  ^E  j  ^N  CR  *  Forward  one line   (or _N lines).
+  y  ^Y  k  ^K  ^P  *  Backward one line   (or _N lines).
+  ESC-j             *  Forward  one file line (or _N file lines).
+  ESC-k             *  Backward one file line (or _N file lines).
+  f  ^F  ^V  SPACE  *  Forward  one window (or _N lines).
+  b  ^B  ESC-v      *  Backward one window (or _N lines).
+  z                 *  Forward  one window (and set window to _N).
+  w                 *  Backward one window (and set window to _N).
+  ESC-SPACE         *  Forward  one window, but don't stop at end-of-file.
+  ESC-b             *  Backward one window, but don't stop at beginning-of-file.
+  d  ^D             *  Forward  one half-window (and set half-window to _N).
+  u  ^U             *  Backward one half-window (and set half-window to _N).
+  ESC-)  RightArrow *  Right one half screen width (or _N positions).
+  ESC-(  LeftArrow  *  Left  one half screen width (or _N positions).
+  ESC-}  ^RightArrow   Right to last column displayed.
+  ESC-{  ^LeftArrow    Left  to first column.
+  F                    Forward forever; like "tail -f".
+  ESC-F                Like F but stop when search pattern is found.
+  r  ^R  ^L            Repaint screen.
+  R                    Repaint screen, discarding buffered input.
+        ---------------------------------------------------
+        Default "window" is the screen height.
+        Default "half-window" is half of the screen height.
+ ---------------------------------------------------------------------------
+
+                          SSEEAARRCCHHIINNGG
+
+  /_p_a_t_t_e_r_n          *  Search forward for (_N-th) matching line.
+  ?_p_a_t_t_e_r_n          *  Search backward for (_N-th) matching line.
+  n                 *  Repeat previous search (for _N-th occurrence).
+  N                 *  Repeat previous search in reverse direction.
+  ESC-n             *  Repeat previous search, spanning files.
+  ESC-N             *  Repeat previous search, reverse dir. & spanning files.
+  ^O^N  ^On         *  Search forward for (_N-th) OSC8 hyperlink.
+  ^O^P  ^Op         *  Search backward for (_N-th) OSC8 hyperlink.
+  ^O^L  ^Ol            Jump to the currently selected OSC8 hyperlink.
+  ESC-u                Undo (toggle) search highlighting.
+  ESC-U                Clear search highlighting.
+  &_p_a_t_t_e_r_n          *  Display only matching lines.
+        ---------------------------------------------------
+		Search is case-sensitive unless changed with -i or -I.
+        A search pattern may begin with one or more of:
+        ^N or !  Search for NON-matching lines.
+        ^E or *  Search multiple files (pass thru END OF FILE).
+        ^F or @  Start search at FIRST file (for /) or last file (for ?).
+        ^K       Highlight matches, but don't move (KEEP position).
+        ^R       Don't use REGULAR EXPRESSIONS.
+        ^S _n     Search for match in _n-th parenthesized subpattern.
+        ^W       WRAP search if no match found.
+        ^L       Enter next character literally into pattern.
+ ---------------------------------------------------------------------------
+
+                           JJUUMMPPIINNGG
+
+  g  <  ESC-<       *  Go to first line in file (or line _N).
+  G  >  ESC->       *  Go to last line in file (or line _N).
+  p  %              *  Go to beginning of file (or _N percent into file).
+  t                 *  Go to the (_N-th) next tag.
+  T                 *  Go to the (_N-th) previous tag.
+  {  (  [           *  Find close bracket } ) ].
+  }  )  ]           *  Find open bracket { ( [.
+  ESC-^F _<_c_1_> _<_c_2_>  *  Find close bracket _<_c_2_>.
+  ESC-^B _<_c_1_> _<_c_2_>  *  Find open bracket _<_c_1_>.
+        ---------------------------------------------------
+        Each "find close bracket" command goes forward to the close bracket 
+          matching the (_N-th) open bracket in the top line.
+        Each "find open bracket" command goes backward to the open bracket 
+          matching the (_N-th) close bracket in the bottom line.
+
+  m_<_l_e_t_t_e_r_>            Mark the current top line with <letter>.
+  M_<_l_e_t_t_e_r_>            Mark the current bottom line with <letter>.
+  '_<_l_e_t_t_e_r_>            Go to a previously marked position.
+  ''                   Go to the previous position.
+  ^X^X                 Same as '.
+  ESC-m_<_l_e_t_t_e_r_>        Clear a mark.
+        ---------------------------------------------------
+        A mark is any upper-case or lower-case letter.
+        Certain marks are predefined:
+             ^  means  beginning of the file
+             $  means  end of the file
+ ---------------------------------------------------------------------------
+
+                        CCHHAANNGGIINNGG FFIILLEESS
+
+  :e [_f_i_l_e]            Examine a new file.
+  ^X^V                 Same as :e.
+  :n                *  Examine the (_N-th) next file from the command line.
+  :p                *  Examine the (_N-th) previous file from the command line.
+  :x                *  Examine the first (or _N-th) file from the command line.
+  ^O^O                 Open the currently selected OSC8 hyperlink.
+  :d                   Delete the current file from the command line list.
+  =  ^G  :f            Print current file name.
+ ---------------------------------------------------------------------------
+
+                    MMIISSCCEELLLLAANNEEOOUUSS CCOOMMMMAANNDDSS
+
+  -_<_f_l_a_g_>              Toggle a command line option [see OPTIONS below].
+  --_<_n_a_m_e_>             Toggle a command line option, by name.
+  __<_f_l_a_g_>              Display the setting of a command line option.
+  ___<_n_a_m_e_>             Display the setting of an option, by name.
+  +_c_m_d                 Execute the less cmd each time a new file is examined.
+
+  !_c_o_m_m_a_n_d             Execute the shell command with $SHELL.
+  #_c_o_m_m_a_n_d             Execute the shell command, expanded like a prompt.
+  |XX_c_o_m_m_a_n_d            Pipe file between current pos & mark XX to shell command.
+  s _f_i_l_e               Save input to a file.
+  v                    Edit the current file with $VISUAL or $EDITOR.
+  V                    Print version number of "less".
+ ---------------------------------------------------------------------------
+
+                           OOPPTTIIOONNSS
+
+        Most options may be changed either on the command line,
+        or from within less by using the - or -- command.
+        Options may be given in one of two forms: either a single
+        character preceded by a -, or a name preceded by --.
+
+  -?  ........  --help
+                  Display help (from command line).
+  -a  ........  --search-skip-screen
+                  Search skips current screen.
+  -A  ........  --SEARCH-SKIP-SCREEN
+                  Search starts just after target line.
+  -b [_N]  ....  --buffers=[_N]
+                  Number of buffers.
+  -B  ........  --auto-buffers
+                  Don't automatically allocate buffers for pipes.
+  -c  ........  --clear-screen
+                  Repaint by clearing rather than scrolling.
+  -d  ........  --dumb
+                  Dumb terminal.
+  -D xx_c_o_l_o_r  .  --color=xx_c_o_l_o_r
+                  Set screen colors.
+  -e  -E  ....  --quit-at-eof  --QUIT-AT-EOF
+                  Quit at end of file.
+  -f  ........  --force
+                  Force open non-regular files.
+  -F  ........  --quit-if-one-screen
+                  Quit if entire file fits on first screen.
+  -g  ........  --hilite-search
+                  Highlight only last match for searches.
+  -G  ........  --HILITE-SEARCH
+                  Don't highlight any matches for searches.
+  -h [_N]  ....  --max-back-scroll=[_N]
+                  Backward scroll limit.
+  -i  ........  --ignore-case
+                  Ignore case in searches that do not contain uppercase.
+  -I  ........  --IGNORE-CASE
+                  Ignore case in all searches.
+  -j [_N]  ....  --jump-target=[_N]
+                  Screen position of target lines.
+  -J  ........  --status-column
+                  Display a status column at left edge of screen.
+  -k _f_i_l_e  ...  --lesskey-file=_f_i_l_e
+                  Use a compiled lesskey file.
+  -K  ........  --quit-on-intr
+                  Exit less in response to ctrl-C.
+  -L  ........  --no-lessopen
+                  Ignore the LESSOPEN environment variable.
+  -m  -M  ....  --long-prompt  --LONG-PROMPT
+                  Set prompt style.
+  -n .........  --line-numbers
+                  Suppress line numbers in prompts and messages.
+  -N .........  --LINE-NUMBERS
+                  Display line number at start of each line.
+  -o [_f_i_l_e] ..  --log-file=[_f_i_l_e]
+                  Copy to log file (standard input only).
+  -O [_f_i_l_e] ..  --LOG-FILE=[_f_i_l_e]
+                  Copy to log file (unconditionally overwrite).
+  -p _p_a_t_t_e_r_n .  --pattern=[_p_a_t_t_e_r_n]
+                  Start at pattern (from command line).
+  -P [_p_r_o_m_p_t]   --prompt=[_p_r_o_m_p_t]
+                  Define new prompt.
+  -q  -Q  ....  --quiet  --QUIET  --silent --SILENT
+                  Quiet the terminal bell.
+  -r  -R  ....  --raw-control-chars  --RAW-CONTROL-CHARS
+                  Output "raw" control characters.
+  -s  ........  --squeeze-blank-lines
+                  Squeeze multiple blank lines.
+  -S  ........  --chop-long-lines
+                  Chop (truncate) long lines rather than wrapping.
+  -t _t_a_g  ....  --tag=[_t_a_g]
+                  Find a tag.
+  -T [_t_a_g_s_f_i_l_e] --tag-file=[_t_a_g_s_f_i_l_e]
+                  Use an alternate tags file.
+  -u  -U  ....  --underline-special  --UNDERLINE-SPECIAL
+                  Change handling of backspaces, tabs and carriage returns.
+  -V  ........  --version
+                  Display the version number of "less".
+  -w  ........  --hilite-unread
+                  Highlight first new line after forward-screen.
+  -W  ........  --HILITE-UNREAD
+                  Highlight first new line after any forward movement.
+  -x [_N[,...]]  --tabs=[_N[,...]]
+                  Set tab stops.
+  -X  ........  --no-init
+                  Don't use termcap init/deinit strings.
+  -y [_N]  ....  --max-forw-scroll=[_N]
+                  Forward scroll limit.
+  -z [_N]  ....  --window=[_N]
+                  Set size of window.
+  -" [_c[_c]]  .  --quotes=[_c[_c]]
+                  Set shell quote characters.
+  -~  ........  --tilde
+                  Don't display tildes after end of file.
+  -# [_N]  ....  --shift=[_N]
+                  Set horizontal scroll amount (0 = one half screen width).
+
+                --exit-follow-on-close
+                  Exit F command on a pipe when writer closes pipe.
+                --file-size
+                  Automatically determine the size of the input file.
+                --follow-name
+                  The F command changes files if the input file is renamed.
+                --form-feed
+                  Stop scrolling when a form feed character is reached.
+                --header=[_L[,_C[,_N]]]
+                  Use _L lines (starting at line _N) and _C columns as headers.
+                --incsearch
+                  Search file as each pattern character is typed in.
+                --intr=[_C]
+                  Use _C instead of ^X to interrupt a read.
+                --lesskey-context=_t_e_x_t
+                  Use lesskey source file contents.
+                --lesskey-src=_f_i_l_e
+                  Use a lesskey source file.
+                --line-num-width=[_N]
+                  Set the width of the -N line number field to _N characters.
+                --match-shift=[_N]
+                  Show at least _N characters to the left of a search match.
+                --modelines=[_N]
+                  Read _N lines from the input file and look for vim modelines.
+                --mouse
+                  Enable mouse input.
+                --no-edit-warn
+                  Don't warn when using v command on a file opened via LESSOPEN.
+                --no-keypad
+                  Don't send termcap keypad init/deinit strings.
+                --no-histdups
+                  Remove duplicates from command history.
+                --no-number-headers
+                  Don't give line numbers to header lines.
+                --no-paste
+                  Ignore pasted input.
+                --no-search-header-lines
+                  Searches do not include header lines.
+                --no-search-header-columns
+                  Searches do not include header columns.
+                --no-search-headers
+                  Searches do not include header lines or columns.
+                --no-vbell
+                  Disable the terminal's visual bell.
+                --redraw-on-quit
+                  Redraw final screen when quitting.
+                --rscroll=[_C]
+                  Set the character used to mark truncated lines.
+                --save-marks
+                  Retain marks across invocations of less.
+                --search-options=[EFKNRW-]
+                  Set default options for every search.
+                --show-preproc-errors
+                  Display a message if preprocessor exits with an error status.
+                --proc-backspace
+                  Process backspaces for bold/underline.
+                --PROC-BACKSPACE
+                  Treat backspaces as control characters.
+                --proc-return
+                  Delete carriage returns before newline.
+                --PROC-RETURN
+                  Treat carriage returns as control characters.
+                --proc-tab
+                  Expand tabs to spaces.
+                --PROC-TAB
+                  Treat tabs as control characters.
+                --status-col-width=[_N]
+                  Set the width of the -J status column to _N characters.
+                --status-line
+                  Highlight or color the entire line containing a mark.
+                --use-backslash
+                  Subsequent options use backslash as escape char.
+                --use-color
+                  Enables colored text.
+                --wheel-lines=[_N]
+                  Each click of the mouse wheel moves _N lines.
+                --wordwrap
+                  Wrap lines at spaces.
+
+
+ ---------------------------------------------------------------------------
+
+                          LLIINNEE EEDDIITTIINNGG
+
+        These keys can be used to edit text being entered 
+        on the "command line" at the bottom of the screen.
+
+ RightArrow ..................... ESC-l ... Move cursor right one character.
+ LeftArrow ...................... ESC-h ... Move cursor left one character.
+ ctrl-RightArrow  ESC-RightArrow  ESC-w ... Move cursor right one word.
+ ctrl-LeftArrow   ESC-LeftArrow   ESC-b ... Move cursor left one word.
+ HOME ........................... ESC-0 ... Move cursor to start of line.
+ END ............................ ESC-$ ... Move cursor to end of line.
+ BACKSPACE ................................ Delete char to left of cursor.
+ DELETE ......................... ESC-x ... Delete char under cursor.
+ ctrl-BACKSPACE   ESC-BACKSPACE ........... Delete word to left of cursor.
+ ctrl-DELETE .... ESC-DELETE .... ESC-X ... Delete word under cursor.
+ ctrl-U ......... ESC (MS-DOS only) ....... Delete entire line.
+ UpArrow ........................ ESC-k ... Retrieve previous command line.
+ DownArrow ...................... ESC-j ... Retrieve next command line.
+ TAB ...................................... Complete filename & cycle.
+ SHIFT-TAB ...................... ESC-TAB   Complete filename & reverse cycle.
+ ctrl-L ................................... Complete filename, list all.
diff --git a/templates/index.html b/templates/index.html
index f1c4dfd..a4d156c 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -71,21 +71,21 @@ body {
     width: 2.2em;
     height: 2.2em;
     border-radius: 50%;
-    background: rgba(37, 99, 235, 0.1);
-    color: var(--primary);
+    background: rgba(37, 99, 235, 0.15);
+    color: var(--primary-dark);
     border: 1px solid var(--border);
     cursor: pointer;
     display: flex;
     align-items: center;
     justify-content: center;
     font-size: 1em;
-    font-weight: 500;
+    font-weight: 600;
     transition: all 0.2s;
     min-width: 44px;
     min-height: 44px;
 }
 .help-button:hover {
-    background: rgba(37, 99, 235, 0.2);
+    background: rgba(37, 99, 235, 0.25);
     border-color: var(--primary);
 }
 .help-button:focus {
@@ -243,7 +243,7 @@ input[type="date"] {
     border: 1px solid var(--border);
     border-radius: 6px;
     font-size: 1em;
-    background: #f1f5f9;
+    background: #ffffff;
     color: var(--text);
 }
 .today-btn {
@@ -292,7 +292,7 @@ button:focus, .accordion-header:focus {
 .result {
     margin-top: 1em;
     font-weight: bold;
-    background: #e0e7ff;
+    background: #dbeafe;
     color: #1e293b;
     border-radius: 6px;
     padding: 0.7em 1em;
@@ -300,13 +300,14 @@ button:focus, .accordion-header:focus {
     box-shadow: 0 1px 2px rgba(30,41,59,0.04);
     border: 2px solid #2563eb;
     position: relative;
+    min-height: 3.5em;
 }
 .read-aloud-btn {
     position: absolute;
     top: 0.5em;
     right: 0.5em;
-    background: rgba(37, 99, 235, 0.1);
-    color: var(--primary);
+    background: rgba(37, 99, 235, 0.15);
+    color: var(--primary-dark);
     border: 1px solid var(--border);
     border-radius: 4px;
     padding: 0.3em 0.6em;
@@ -321,14 +322,14 @@ button:focus, .accordion-header:focus {
     z-index: 5;
 }
 .read-aloud-btn:hover {
-    background: rgba(37, 99, 235, 0.2);
+    background: rgba(37, 99, 235, 0.25);
     border-color: var(--primary);
 }
 .read-aloud-btn:focus {
     outline: 3px solid #facc15;
     outline-offset: 2px;
     box-shadow: 0 0 0 4px #1e293b;
-    background: rgba(37, 99, 235, 0.2);
+    background: rgba(37, 99, 235, 0.25);
     border-color: var(--primary);
 }
 .read-aloud-btn.playing {
@@ -397,11 +398,11 @@ button:focus, .accordion-header:focus {
     color: #fff;
 }
 .header-wochentag {
-    background: #f59e42;
-    color: #1e293b;
+    background: #ea580c;
+    color: #fff;
 }
 .header-wochentag.active, .header-wochentag:hover {
-    background: #d97706;
+    background: #c2410c;
     color: #fff;
 }
 .header-plusminus-tage {
@@ -429,19 +430,19 @@ button:focus, .accordion-header:focus {
     color: #fff;
 }
 .header-kw {
-    background: #a78bfa;
-    color: #1e293b;
-}
-.header-kw.active, .header-kw:hover {
     background: #7c3aed;
     color: #fff;
 }
+.header-kw.active, .header-kw:hover {
+    background: #6d28d9;
+    color: #fff;
+}
 .header-kw-datum {
-    background: #facc15;
-    color: #1e293b;
+    background: #ca8a04;
+    color: #fff;
 }
 .header-kw-datum.active, .header-kw-datum:hover {
-    background: #ca8a04;
+    background: #a16207;
     color: #fff;
 }
 .header-plusminus {
@@ -693,9 +694,9 @@ footer br + a {
             <div id="help-tooltip" class="help-tooltip" role="tooltip">Öffnet ein Hilfefenster mit Informationen über den Datumsrechner</div>
         </div>
         <div style="text-align:center; margin-bottom:1.2em;">
-            <div style="font-size:1.1em; font-style:italic; color:#64748b;">Elpatrons</div>
+            <div style="font-size:1.1em; font-style:italic; color:#475569;">Elpatrons</div>
             <h1 style="margin:0;">Datumsrechner</h1>
-            <div style="font-size:0.9em; color:#353535; margin-top:0.3em;">
+            <div style="font-size:0.9em; color:#1e293b; margin-top:0.3em;">
                 Eine <em>freie</em> Web-App: barriere<em>frei</em>, werbe<em>frei</em>, tracking<em>frei</em>, lizenz<em>frei</em> und kosten<em>frei</em>.
             </div>
         </div>
@@ -754,19 +755,19 @@ footer br + a {
                         <div class="result" aria-live="polite">
                             <button type="button" class="read-aloud-btn" onclick="readAloudFromElement(this)" onkeydown="if(event.key==='Enter'||event.key===' ') { event.preventDefault(); readAloudFromElement(this); }" aria-label="Ergebnis vorlesen" title="Ergebnis vorlesen" tabindex="0">🔊</button>
                             {% if request.form.get('werktage') %}
-                                Anzahl der Werktage zwischen <b>{{ format_date(request.form.get('start1', '')) }}</b> und <b>{{ format_date(request.form.get('end1', '')) }}</b>{% if request.form.get('bundesland') %} (Feiertage {{ request.form.get('bundesland') }}){% endif %}: {{ tage }}
+                                Anzahl der Werktage zwischen <b>{{ format_date(request.form.get('start1', '')) }}</b> und <b>{{ format_date(request.form.get('end1', '')) }}:</b>{% if request.form.get('bundesland') %} (Feiertage: {{ request.form.get('bundesland') }}){% endif %}: {{ tage }}
                             {% else %}
-                                Anzahl der Tage zwischen <b>{{ format_date(request.form.get('start1', '')) }}</b> und <b>{{ format_date(request.form.get('end1', '')) }}</b>: {{ tage }}
+                                Anzahl der Tage zwischen <b>{{ format_date(request.form.get('start1', '')) }}</b> und <b>{{ format_date(request.form.get('end1', '')) }}</b>: {{ tage }}.
                             {% endif %}
-                            {% if wochenendtage_anzahl is not none or feiertage_anzahl is not none %}
+                            {% if wochenendtage_anzahl is not none or (feiertage_anzahl is not none and request.form.get('bundesland')) %}
                                 <br>
                                 <span style="font-size:0.98em; color:#1e293b;">
                                     {% if wochenendtage_anzahl is not none %}
-                                        <b>{{ wochenendtage_anzahl }}</b> Wochenendtage
+                                        <b>Davon sind {{ wochenendtage_anzahl }}</b> Tage Wochenendtage.
                                     {% endif %}
-                                    {% if feiertage_anzahl is not none %}
-                                        {% if wochenendtage_anzahl is not none %} | {% endif %}
-                                        <b>{{ feiertage_anzahl }}</b> Feiertage (Mo-Fr{% if request.form.get('bundesland') %}, {{ request.form.get('bundesland') }}{% endif %})
+                                    {% if feiertage_anzahl is not none and request.form.get('bundesland') %}
+                                        {% if wochenendtage_anzahl is not none %}, {% endif %}
+                                        <b>{{ feiertage_anzahl }}</b> Feiertage (Mo-Fr, {{ request.form.get('bundesland') }})
                                     {% endif %}
                                 </span>
                             {% endif %}
@@ -951,11 +952,11 @@ footer br + a {
         </div>
     </div>
     
-    <footer style="text-align:center; margin-top:2em; color:#64748b; font-size:0.98em; padding-bottom:1.5em;">
-        Dies ist ein werbe- und trackingfreier <a href="https://codeberg.org/elpatron/datecalc/src/branch/main/README.md" target="_blank" style="color:#2563eb; text-decoration:underline;">Open Source Datumsrechner</a><br>
-        <a href="/api-docs" target="_blank" style="color:#2563eb; text-decoration:underline;">REST API Dokumentation (Swagger)</a><br>
-        © 2025 <a href="mailto:elpatron@mailbox.org?subject=Datumsrechner" style="color:#2563eb; text-decoration:underline;">M. Busche</a>
-        <div style="margin-top:0.5em; font-size:0.85em; color:#94a3b8;">v{{ app_version }}</div>
+    <footer style="text-align:center; margin-top:2em; color:#475569; font-size:0.98em; padding-bottom:1.5em;">
+        Dies ist ein werbe- und trackingfreier <a href="https://codeberg.org/elpatron/datecalc/src/branch/main/README.md" target="_blank" style="color:#1e40af; text-decoration:underline;">Open Source Datumsrechner</a><br>
+        <a href="/api-docs" target="_blank" style="color:#1e40af; text-decoration:underline;">REST API Dokumentation (Swagger)</a><br>
+        © 2025 <a href="mailto:elpatron@mailbox.org?subject=Datumsrechner" style="color:#1e40af; text-decoration:underline;">M. Busche</a>
+        <div style="margin-top:0.5em; font-size:0.85em; color:#64748b;">v{{ app_version }}</div>
     </footer>
 <script>
 document.addEventListener('DOMContentLoaded', function() {