diff --git a/sl/SL_Menu.py b/sl/SL_Menu.py
index 91b780f..b10f1fe 100644
--- a/sl/SL_Menu.py
+++ b/sl/SL_Menu.py
@@ -20,6 +20,17 @@
 except (ImportError, ModuleNotFoundError):
     UPDATE_MODULE_AVAILABLE = False
 
+try:
+    # Internal (not officially public) API, but it's the only way to tell a
+    # fragment's own run_every tick apart from an ordinary rerun - see the
+    # usage in _auto_refresh_on_external_changes() for why that distinction
+    # matters. Guarded so a future Streamlit release that moves/removes this
+    # degrades to the older, less precise timing-based heuristic instead of
+    # crashing the app outright.
+    from streamlit.runtime.scriptrunner_utils.script_run_context import get_script_run_ctx
+except ImportError:
+    get_script_run_ctx = None
+
 # --- Configuration & Setup ---
 CONFIG_FILE = 'config.json'
 SL_DIR = os.path.dirname(os.path.abspath(__file__))
@@ -245,14 +256,6 @@ def navigate_to(menu_name):
     :param menu_name: The key of the menu to navigate to (must exist in menu_map).
     """
     st.session_state.menu = menu_name
-    # Counts as "just refreshed" so the auto-refresh fragment (see
-    # _auto_refresh_on_external_changes below) doesn't fire its own
-    # competing st.rerun() while this navigation's rerun is still being
-    # processed - otherwise that second rerun can win the race and abort
-    # this one before the newly selected menu ever gets rendered, making the
-    # click look like it did nothing (or, if the user then clicks again out
-    # of impatience, like the view jumped to the wrong place).
-    st.session_state["_last_auto_refresh"] = time.monotonic()
     st.rerun()
     
 def set_feedback(message, type='success'):
@@ -305,13 +308,36 @@ def _auto_refresh_on_external_changes():
     since an MCP client can be spawning that process independently of what
     this app's own config says, so there's no reliable way to know it isn't.
 
-    This function is invoked twice per cycle: once inline as a normal part
-    of every full script run (including the one it itself triggers below),
-    and once on its own every `run_every` seconds via the fragment's timer.
-    The timestamp check tells those two cases apart - without it, calling
-    st.rerun() unconditionally here would re-trigger itself instantly on
-    every single run and the app would never finish rendering.
-    """
+    This function is invoked two different ways: inline, as a normal part of
+    every full script run (a click anywhere in the app, navigate_to(), ...),
+    and separately, on its own, every `run_every` seconds via the fragment's
+    own timer. Only the second case should trigger a rerun here - Streamlit
+    runs a timer-triggered tick as a fragment-scoped rerun that calls only
+    this function's body and nothing else in the script (see
+    streamlit/runtime/scriptrunner/script_runner.py: a rerun with a non-empty
+    fragment_id_queue calls just the stored fragment closure instead of
+    exec()-ing the rest of the script), so escalating to a full st.rerun()
+    is genuinely needed there for the data reload and current view to
+    actually refresh. An inline call, by contrast, is already running as
+    part of a full script execution - calling st.rerun() there would abort
+    that very run before it reaches whatever code (a button's own handler,
+    say) triggered it in the first place, silently discarding that
+    interaction. That was a real, user-reported bug: clicks made after a few
+    seconds of idling (long enough to make this look like a timer tick by
+    elapsed time alone, which is what an earlier version of this function
+    compared against) would occasionally do nothing on the first try.
+    ctx.fragment_ids_this_run tells the two cases apart directly instead of
+    guessing from elapsed time.
+    """
+    ctx = get_script_run_ctx() if get_script_run_ctx else None
+    if ctx is not None:
+        if ctx.fragment_ids_this_run:
+            st.rerun()
+        return
+
+    # Fallback if a future Streamlit release moves/removes the internal hook
+    # above: less precise (can still occasionally preempt a click that lands
+    # in the same ~4s window), but keeps the periodic refresh itself working.
     now = time.monotonic()
     last_refresh = st.session_state.get("_last_auto_refresh")
     st.session_state["_last_auto_refresh"] = now
diff --git a/sl/style_blue.css b/sl/style_blue.css
new file mode 100644
index 0000000..55de807
--- /dev/null
+++ b/sl/style_blue.css
@@ -0,0 +1,292 @@
+/* ==========================================================================
+   TimeControl - Blue Style
+   ==========================================================================
+   Clean, professional palette inspired by Dlubal's own software (RFEM /
+   Dlubal CALC): a near-white page background, soft blue-gray card borders,
+   and a corporate blue accent for buttons, links and selection states.
+
+   Custom properties live on :root (not .stApp) because several Streamlit
+   components (popover panels, select/date dropdowns) render into a portal
+   appended directly to <body>, outside .stApp's own subtree - a variable
+   defined only on .stApp would never reach them.
+   ========================================================================== */
+
+:root {
+    --tc-bg: #F7F9FC;
+    --tc-bg-elevated: #FFFFFF;
+    --tc-bg-input: #FFFFFF;
+    --tc-bg-hover: #EAF1FC;
+    --tc-text: #1E2A3A;
+    --tc-text-muted: #6B7686;
+    --tc-border: #E1E7F0;
+    --tc-accent: #2E6FE3;
+    --tc-accent-hover: #1E56C4;
+    --tc-icon-color: #55627A;
+    --tc-code-text: #2E6FE3;
+}
+
+/* Global Font & Background */
+.stApp {
+    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
+    background-color: var(--tc-bg);
+    color: var(--tc-text);
+}
+
+/* Native Streamlit chrome: the fixed header bar (Deploy/hamburger menu) and
+   the toolbar/decoration strip sit outside .stApp's own background, so they
+   otherwise stay on Streamlit's default white/gray regardless of the rest
+   of the page. */
+header[data-testid="stHeader"],
+[data-testid="stToolbar"],
+[data-testid="stDecoration"] {
+    background-color: var(--tc-bg) !important;
+    color: var(--tc-text);
+}
+
+header[data-testid="stHeader"] svg {
+    fill: var(--tc-icon-color) !important;
+}
+
+/* Headings */
+h1, h2, h3 {
+    font-weight: 700;
+    color: var(--tc-text);
+    letter-spacing: -0.02em;
+}
+
+h1 {
+    font-size: 2.0rem;
+    padding-bottom: 0.5rem;
+    border-bottom: 1px solid var(--tc-border);
+    margin-bottom: 1.5rem;
+    padding-top: 0.1rem;
+}
+
+h1::before {
+    content: "⏱️";
+    margin-right: 0.5rem;
+}
+
+h2 {
+    font-size: 1.6rem;
+}
+
+h3 {
+    font-size: 1.35rem;
+}
+
+h4 {
+    font-size: 1.15rem;
+}
+
+h5, h6 {
+    font-size: 1.0rem;
+}
+
+/* Widget labels, captions and help tooltips */
+[data-testid="stWidgetLabel"] p,
+[data-testid="stCaptionContainer"],
+[data-testid="stCaptionContainer"] p,
+[data-testid="stMarkdownContainer"] small {
+    color: var(--tc-text-muted) !important;
+}
+
+[data-testid="stTooltipIcon"] {
+    color: var(--tc-text-muted) !important;
+}
+
+/* Buttons - regular, form-submit and popover triggers all need the same
+   treatment so none of them fall back to Streamlit's own default styling. */
+.stButton button,
+[data-testid="stFormSubmitButton"] button,
+[data-testid="stPopoverButton"] {
+    border-radius: 10px;
+    font-weight: 600;
+    border: 1px solid var(--tc-border);
+    background-color: var(--tc-bg-elevated);
+    color: var(--tc-text);
+    transition: all 0.2s ease-in-out;
+    box-shadow: 0 1px 2px rgba(30, 42, 58, 0.06);
+}
+
+.stButton button:hover,
+[data-testid="stFormSubmitButton"] button:hover,
+[data-testid="stPopoverButton"]:hover {
+    border-color: var(--tc-accent);
+    color: var(--tc-accent-hover);
+    background-color: var(--tc-bg-hover);
+    transform: translateY(-1px);
+    box-shadow: 0 4px 10px rgba(30, 42, 58, 0.10);
+}
+
+.stButton button:active,
+[data-testid="stFormSubmitButton"] button:active {
+    transform: translateY(0);
+    box-shadow: none;
+}
+
+.stButton button:disabled,
+.stButton button:disabled:hover {
+    opacity: 0.5;
+    color: var(--tc-text-muted) !important;
+    border-color: var(--tc-border) !important;
+    background-color: var(--tc-bg-elevated) !important;
+    transform: none;
+    box-shadow: none;
+}
+
+/* Primary-type buttons (e.g. "Add Task") get a solid accent fill, matching
+   Dlubal CALC's own "New chat" / "Sign up" call-to-action buttons. */
+[data-testid="stBaseButton-primary"] {
+    background-color: var(--tc-accent) !important;
+    border-color: var(--tc-accent) !important;
+    color: #FFFFFF !important;
+}
+
+[data-testid="stBaseButton-primary"]:hover {
+    background-color: var(--tc-accent-hover) !important;
+    border-color: var(--tc-accent-hover) !important;
+    color: #FFFFFF !important;
+}
+
+/* The dropdown card a popover opens (toolbar's New/Management/Reporting
+   menus) - rendered in a body-level portal, stayed on Streamlit's default
+   white/gray otherwise. */
+[data-testid="stPopoverBody"],
+[data-testid="stPopoverBody"] > div {
+    background-color: var(--tc-bg-elevated) !important;
+    border: 1px solid var(--tc-border) !important;
+    color: var(--tc-text);
+}
+
+/* Input Fields */
+.stTextInput input,
+.stNumberInput input,
+.stTextArea textarea,
+.stDateInput input,
+.stSelectbox div[data-baseweb="select"] > div {
+    border-radius: 8px;
+    border: 1px solid var(--tc-border);
+    background-color: var(--tc-bg-input);
+    color: var(--tc-text);
+}
+
+.stTextInput input:focus,
+.stNumberInput input:focus,
+.stTextArea textarea:focus {
+    border-color: var(--tc-accent) !important;
+    box-shadow: 0 0 0 1px var(--tc-accent) !important;
+}
+
+.stTextInput input::placeholder,
+.stTextArea textarea::placeholder {
+    color: var(--tc-text-muted);
+    opacity: 1;
+}
+
+[data-testid="stNumberInputStepDown"],
+[data-testid="stNumberInputStepUp"] {
+    background-color: var(--tc-bg-hover) !important;
+    border-color: var(--tc-border) !important;
+    color: var(--tc-text) !important;
+}
+
+/* Select / date-input dropdown popups also render in a body-level portal
+   via BaseWeb, so they need the same background rendered explicitly. The
+   plain [data-baseweb="popover"] wrapper (and the unlabeled div directly
+   inside it) is what shows a card behind the calendar/menu content - the
+   inner listbox/menu/calendar elements need their own override too. */
+[data-baseweb="popover"],
+[data-baseweb="popover"] > div,
+[data-baseweb="popover"] [role="listbox"],
+[data-baseweb="menu"],
+[data-baseweb="calendar"] {
+    background-color: var(--tc-bg-elevated) !important;
+    color: var(--tc-text) !important;
+}
+
+[data-baseweb="popover"] li[role="option"],
+[data-baseweb="menu"] li {
+    color: var(--tc-text) !important;
+}
+
+[data-baseweb="popover"] li[role="option"]:hover,
+[data-baseweb="menu"] li:hover {
+    background-color: var(--tc-bg-hover) !important;
+}
+
+/* The date-input calendar's month/year header bar and weekday-initials row
+   keep Streamlit's default secondary-background grey regardless of theme;
+   [role="presentation"] reaches the weekday row, .st-c7 is the shared class
+   between it and the header bar just above it. Out-of-month filler day
+   cells render their fill via a ::after pseudo-element rather than their
+   own background, so they need a separate override. */
+[data-baseweb="calendar"] [role="presentation"],
+[data-baseweb="calendar"] .st-c7 {
+    background-color: transparent !important;
+}
+
+[data-baseweb="calendar"] [role="gridcell"]::after {
+    background-color: transparent !important;
+}
+
+/* The selected day's own indicator (a circular ::after ring BaseWeb pairs
+   with white text) shares that same pseudo-element with the out-of-month
+   filler cells above, so it lost its fill too - leaving white-on-transparent
+   text that's invisible against this theme's light background. Restore a
+   solid, on-brand circle behind just the selected day. */
+[data-baseweb="calendar"] .st-cj::after {
+    background-color: var(--tc-accent) !important;
+}
+
+/* Checkbox */
+[data-testid="stCheckbox"] label p {
+    color: var(--tc-text) !important;
+}
+
+/* Expander */
+[data-testid="stExpander"] {
+    border: 1px solid var(--tc-border);
+    border-radius: 10px;
+    background-color: var(--tc-bg-elevated);
+    overflow: hidden;
+}
+
+[data-testid="stExpander"] summary {
+    color: var(--tc-text) !important;
+}
+
+[data-testid="stExpander"] summary:hover {
+    background-color: var(--tc-bg-hover);
+}
+
+/* Divider */
+hr {
+    border-color: var(--tc-border) !important;
+}
+
+/* Alerts (st.info/success/warning/error) */
+[data-testid="stAlert"] {
+    background-color: var(--tc-bg-elevated);
+    border-radius: 8px;
+    border: 1px solid var(--tc-border);
+}
+
+/* Inline code and code blocks */
+code {
+    background-color: var(--tc-bg-hover) !important;
+    color: var(--tc-code-text) !important;
+}
+
+/* Report Box */
+.report-box {
+    background-color: #FFFFFF;
+    padding: 20px;
+    border-radius: 12px;
+    font-family: 'SF Mono', 'Menlo', 'Monaco', 'Courier New', monospace;
+    font-size: 0.9em;
+    white-space: pre-wrap;
+    border: 1px solid var(--tc-border);
+    box-shadow: inset 0 1px 3px rgba(30, 42, 58, 0.06);
+    color: var(--tc-text);
+}
diff --git a/sl/style_claude.css b/sl/style_claude.css
index 567f263..03930db 100644
--- a/sl/style_claude.css
+++ b/sl/style_claude.css
@@ -231,6 +231,15 @@ h5, h6 {
     background-color: transparent !important;
 }
 
+/* The selected day's own indicator (a circular ::after ring BaseWeb pairs
+   with white text) shares that same pseudo-element with the out-of-month
+   filler cells above, so it lost its fill too - leaving white-on-transparent
+   text that's invisible against this theme's light background. Restore a
+   solid, on-brand circle behind just the selected day. */
+[data-baseweb="calendar"] .st-cj::after {
+    background-color: var(--tc-accent) !important;
+}
+
 /* Checkbox */
 [data-testid="stCheckbox"] label p {
     color: var(--tc-text) !important;
diff --git a/sl/style_dark.css b/sl/style_dark.css
index 1229943..57c8b89 100644
--- a/sl/style_dark.css
+++ b/sl/style_dark.css
@@ -202,6 +202,16 @@ h5, h6 {
     background-color: transparent !important;
 }
 
+/* The selected day's own indicator (a circular ::after ring BaseWeb pairs
+   with white text) shares that same pseudo-element with the out-of-month
+   filler cells above, so it lost its fill too. Text still happens to read
+   fine here since this theme's regular day text is already light-on-dark,
+   but give the selected day its own solid, on-brand circle too rather than
+   relying on that coincidence. */
+[data-baseweb="calendar"] .st-cj::after {
+    background-color: var(--tc-accent) !important;
+}
+
 [data-baseweb="popover"] li[role="option"]:hover,
 [data-baseweb="menu"] li:hover {
     background-color: var(--tc-bg-hover) !important;