diff --git a/src/ui/screens/home_screen.py b/src/ui/screens/home_screen.py
index 1cf173b..e16975b 100644
--- a/src/ui/screens/home_screen.py
+++ b/src/ui/screens/home_screen.py
@@ -9,69 +9,11 @@ from PyQt6.QtGui import QFont, QPixmap, QImage, QMouseEvent
 
 from services.usb_watcher import UsbWatcher
 from ui.widgets.config_dialog import load_config, ConfigDialog
-
-BTN_STYLE = """
-    QPushButton {{
-        background-color: {bg};
-        color: white;
-        border-radius: 15px;
-        padding: 20px;
-    }}
-    QPushButton:pressed {{
-        background-color: {pressed};
-    }}
-"""
-BTN_BLUE = BTN_STYLE.format(bg="#2196F3", pressed="#1976D2")
-BTN_GREEN = BTN_STYLE.format(bg="#4CAF50", pressed="#388E3C")
-
-BACK_BTN_STYLE = """
-    QPushButton {
-        background-color: #757575;
-        color: white;
-        border-radius: 12px;
-        padding: 12px 30px;
-        font-size: 16px;
-    }
-    QPushButton:pressed { background-color: #616161; }
-"""
-
-HIGHLIGHT_STYLE = """
-    QLabel {
-        background-color: #E3F2FD;
-        border: 2px solid #2196F3;
-        border-radius: 10px;
-        padding: 15px;
-        color: #1565C0;
-        font-size: 20px;
-    }
-"""
-
-ERROR_STYLE = """
-    QLabel {
-        background-color: #FFEBEE;
-        border: 2px solid #F44336;
-        border-radius: 10px;
-        padding: 15px;
-        color: #C62828;
-    }
-"""
-
-SUCCESS_STYLE = """
-    QLabel {
-        background-color: #E8F5E9;
-        border: 2px solid #4CAF50;
-        border-radius: 10px;
-        padding: 15px;
-        color: #2E7D32;
-    }
-"""
-
-INFO_STYLE = """
-    QLabel {
-        color: #333;
-        padding: 10px;
-    }
-"""
+from ui.style import (
+    scale, scaled_font, Sizes,
+    blue_btn, green_btn, back_btn_style,
+    highlight_box, error_box, success_box
+)
 
 
 class LongPressLabel(QLabel):
@@ -80,7 +22,6 @@ class LongPressLabel(QLabel):
     def __init__(self, text, callback, parent=None):
         super().__init__(text, parent)
         self._callback = callback
-        self._press_timer = QElapsedTimer()
         self._long_press_timer = QTimer(self)
         self._long_press_timer.setSingleShot(True)
         self._long_press_timer.timeout.connect(self._on_long_press)
@@ -109,12 +50,11 @@ class HomeScreen(QWidget):
 
     def _setup_ui(self):
         layout = QVBoxLayout(self)
-        layout.setContentsMargins(20, 15, 20, 15)
-        layout.setSpacing(10)
+        layout.setContentsMargins(0, 0, 0, 0)
+        layout.setSpacing(0)
 
         # Titre (appui long 5s = config)
         self.title = LongPressLabel("Photostation", self._open_config)
-        self.title.setFont(QFont("", 42, QFont.Weight.Bold))
         self.title.setAlignment(Qt.AlignmentFlag.AlignCenter)
         layout.addWidget(self.title)
 
@@ -129,16 +69,58 @@ class HomeScreen(QWidget):
         self.stack.addWidget(self._build_qr_page())          # 3
         self.stack.addWidget(self._build_email_page())       # 4
 
+    def showEvent(self, event):
+        """Applique les styles responsive une fois la fenêtre dimensionnée."""
+        super().showEvent(event)
+        QTimer.singleShot(0, self._apply_responsive_styles)
+
+    def resizeEvent(self, event):
+        super().resizeEvent(event)
+        self._apply_responsive_styles()
+
+    def _apply_responsive_styles(self):
+        """Recalcule toutes les tailles proportionnellement à la fenêtre."""
+        m = scale(self, Sizes.MARGIN)
+        sp = scale(self, Sizes.SPACING)
+        self.layout().setContentsMargins(m, m, m, m)
+        self.layout().setSpacing(sp)
+
+        # Titre
+        self.title.setFont(scaled_font(self, Sizes.TITLE, bold=True))
+
+        # Boutons de mode
+        btn_h = scale(self, Sizes.BTN_MODE_H)
+        for btn in self.mode_buttons.values():
+            btn.setMinimumHeight(btn_h)
+            btn.setStyleSheet(blue_btn(self))
+            btn.setFont(scaled_font(self, Sizes.BUTTON_LARGE))
+
+        # USB bouton vert si clé détectée
+        if self._usb_photos:
+            self.mode_buttons["USB"].setStyleSheet(green_btn(self))
+
+        # Tous les labels et boutons des sous-pages
+        self._style_usb_page()
+        self._style_wifi_page()
+        self._style_qr_page()
+        self._style_email_page()
+
+        # Hint config
+        self.config_hint.setFont(scaled_font(self, Sizes.HINT))
+
     def _make_back_button(self):
         btn = QPushButton("< Retour")
-        btn.setFont(QFont("", 16, QFont.Weight.Bold))
-        btn.setMinimumSize(150, 55)
-        btn.setStyleSheet(BACK_BTN_STYLE)
         btn.clicked.connect(self._show_modes)
+        self._back_buttons.append(btn)
         return btn
 
+    def _style_back_buttons(self):
+        for btn in self._back_buttons:
+            btn.setFont(scaled_font(self, Sizes.BUTTON_TEXT, bold=True))
+            btn.setMinimumHeight(scale(self, Sizes.BTN_HEIGHT))
+            btn.setStyleSheet(back_btn_style(self))
+
     def _make_page_header(self):
-        """Header commun : gros bouton Retour en haut à gauche."""
         header = QHBoxLayout()
         header.addWidget(self._make_back_button())
         header.addStretch()
@@ -147,18 +129,17 @@ class HomeScreen(QWidget):
     # ─── Page 0 : Sélection des modes ───
 
     def _build_mode_selection(self):
+        self._back_buttons = []
+
         page = QWidget()
         layout = QVBoxLayout(page)
         layout.setAlignment(Qt.AlignmentFlag.AlignCenter)
-        layout.setSpacing(30)
 
-        subtitle = QLabel("Comment souhaitez-vous envoyer vos photos ?")
-        subtitle.setFont(QFont("", 18))
-        subtitle.setAlignment(Qt.AlignmentFlag.AlignCenter)
-        layout.addWidget(subtitle)
+        self.mode_subtitle = QLabel("Comment souhaitez-vous envoyer vos photos ?")
+        self.mode_subtitle.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        layout.addWidget(self.mode_subtitle)
 
         buttons_layout = QHBoxLayout()
-        buttons_layout.setSpacing(20)
 
         modes = [
             ("USB", "Clé USB", self._show_usb),
@@ -170,21 +151,16 @@ class HomeScreen(QWidget):
         self.mode_buttons = {}
         for label, desc, callback in modes:
             btn = QPushButton(f"{label}\n\n{desc}")
-            btn.setFont(QFont("", 16))
-            btn.setMinimumSize(200, 150)
-            btn.setStyleSheet(BTN_BLUE)
             btn.clicked.connect(callback)
             buttons_layout.addWidget(btn)
             self.mode_buttons[label] = btn
 
         layout.addLayout(buttons_layout)
 
-        # Hint config
-        hint = QLabel("Appui long sur le titre pour accéder à la configuration")
-        hint.setFont(QFont("", 10))
-        hint.setAlignment(Qt.AlignmentFlag.AlignCenter)
-        hint.setStyleSheet("color: #bbb;")
-        layout.addWidget(hint)
+        self.config_hint = QLabel("Appui long sur le titre pour accéder à la configuration")
+        self.config_hint.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        self.config_hint.setStyleSheet("color: #bbb;")
+        layout.addWidget(self.config_hint)
 
         return page
 
@@ -193,28 +169,19 @@ class HomeScreen(QWidget):
     def _build_usb_page(self):
         page = QWidget()
         layout = QVBoxLayout(page)
-        layout.setSpacing(20)
-
         layout.addLayout(self._make_page_header())
 
-        instruction = QLabel("Insérez votre clé USB dans le port\nde la borne")
-        instruction.setFont(QFont("", 24))
-        instruction.setAlignment(Qt.AlignmentFlag.AlignCenter)
-        layout.addWidget(instruction)
+        self.usb_instruction = QLabel("Insérez votre clé USB\ndans le port de la borne")
+        self.usb_instruction.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        layout.addWidget(self.usb_instruction)
 
         layout.addStretch()
 
         self.usb_status_label = QLabel("Clé USB non détectée\nInsérez votre clé USB puis patientez quelques secondes")
-        self.usb_status_label.setFont(QFont("", 18))
         self.usb_status_label.setAlignment(Qt.AlignmentFlag.AlignCenter)
-        self.usb_status_label.setMinimumHeight(80)
-        self.usb_status_label.setStyleSheet(ERROR_STYLE)
         layout.addWidget(self.usb_status_label)
 
         self.usb_continue_btn = QPushButton("Continuer")
-        self.usb_continue_btn.setFont(QFont("", 18, QFont.Weight.Bold))
-        self.usb_continue_btn.setMinimumSize(250, 60)
-        self.usb_continue_btn.setStyleSheet(BTN_GREEN)
         self.usb_continue_btn.clicked.connect(self._import_usb)
         self.usb_continue_btn.hide()
         layout.addWidget(self.usb_continue_btn, alignment=Qt.AlignmentFlag.AlignCenter)
@@ -222,127 +189,138 @@ class HomeScreen(QWidget):
         layout.addStretch()
         return page
 
+    def _style_usb_page(self):
+        self.usb_instruction.setFont(scaled_font(self, Sizes.HEADING))
+        self.usb_status_label.setFont(scaled_font(self, Sizes.BODY))
+        self._update_usb_status()
+        self.usb_continue_btn.setFont(scaled_font(self, Sizes.BUTTON_LARGE, bold=True))
+        self.usb_continue_btn.setMinimumHeight(scale(self, Sizes.BTN_HEIGHT))
+        self.usb_continue_btn.setMinimumWidth(scale(self, 30))
+        self.usb_continue_btn.setStyleSheet(green_btn(self))
+        self._style_back_buttons()
+
     # ─── Page 2 : WiFi ───
 
     def _build_wifi_page(self):
         page = QWidget()
         layout = QVBoxLayout(page)
-        layout.setSpacing(20)
-
         layout.addLayout(self._make_page_header())
 
-        instruction = QLabel("Connectez-vous au réseau WiFi\nde la borne depuis votre téléphone")
-        instruction.setFont(QFont("", 24))
-        instruction.setAlignment(Qt.AlignmentFlag.AlignCenter)
-        layout.addWidget(instruction)
+        self.wifi_instruction = QLabel("Connectez-vous au réseau WiFi\nde la borne depuis votre téléphone")
+        self.wifi_instruction.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        layout.addWidget(self.wifi_instruction)
 
         layout.addStretch()
 
-        self.wifi_name_label = QLabel(f"Nom du réseau :  {self.config['wifi_ap_name']}")
-        self.wifi_name_label.setFont(QFont("", 22, QFont.Weight.Bold))
+        self.wifi_name_label = QLabel()
         self.wifi_name_label.setAlignment(Qt.AlignmentFlag.AlignCenter)
-        self.wifi_name_label.setStyleSheet(HIGHLIGHT_STYLE)
         layout.addWidget(self.wifi_name_label)
 
-        self.wifi_pass_label = QLabel(f"Mot de passe :  {self.config['wifi_ap_password']}")
-        self.wifi_pass_label.setFont(QFont("", 22, QFont.Weight.Bold))
+        self.wifi_pass_label = QLabel()
         self.wifi_pass_label.setAlignment(Qt.AlignmentFlag.AlignCenter)
-        self.wifi_pass_label.setStyleSheet(HIGHLIGHT_STYLE)
         layout.addWidget(self.wifi_pass_label)
 
-        step2 = QLabel("Une fois connecté, une page s'ouvrira\nautomatiquement pour envoyer vos photos")
-        step2.setFont(QFont("", 16))
-        step2.setAlignment(Qt.AlignmentFlag.AlignCenter)
-        step2.setStyleSheet("color: #666;")
-        layout.addWidget(step2)
+        self.wifi_hint = QLabel("Une fois connecté, une page s'ouvrira\nautomatiquement pour envoyer vos photos")
+        self.wifi_hint.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        self.wifi_hint.setStyleSheet("color: #666;")
+        layout.addWidget(self.wifi_hint)
 
         self.wifi_status_label = QLabel("En attente de connexion...")
-        self.wifi_status_label.setFont(QFont("", 16))
         self.wifi_status_label.setAlignment(Qt.AlignmentFlag.AlignCenter)
-        self.wifi_status_label.setStyleSheet(INFO_STYLE)
         layout.addWidget(self.wifi_status_label)
 
         layout.addStretch()
         return page
 
+    def _style_wifi_page(self):
+        self.wifi_instruction.setFont(scaled_font(self, Sizes.HEADING))
+        self.wifi_name_label.setFont(scaled_font(self, Sizes.BODY_LARGE, bold=True))
+        self.wifi_name_label.setStyleSheet(highlight_box(self))
+        self.wifi_pass_label.setFont(scaled_font(self, Sizes.BODY_LARGE, bold=True))
+        self.wifi_pass_label.setStyleSheet(highlight_box(self))
+        self.wifi_hint.setFont(scaled_font(self, Sizes.BODY))
+        self.wifi_status_label.setFont(scaled_font(self, Sizes.BODY))
+        self._refresh_config_labels()
+
     # ─── Page 3 : QR Code ───
 
     def _build_qr_page(self):
         page = QWidget()
         layout = QVBoxLayout(page)
-        layout.setSpacing(15)
-
         layout.addLayout(self._make_page_header())
 
-        instruction = QLabel("Scannez ce QR code avec votre téléphone\npour envoyer vos photos")
-        instruction.setFont(QFont("", 24))
-        instruction.setAlignment(Qt.AlignmentFlag.AlignCenter)
-        layout.addWidget(instruction)
+        self.qr_instruction = QLabel("Scannez ce QR code avec votre téléphone\npour envoyer vos photos")
+        self.qr_instruction.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        layout.addWidget(self.qr_instruction)
 
         self.qr_image_label = QLabel()
-        self.qr_image_label.setFixedSize(250, 250)
         self.qr_image_label.setAlignment(Qt.AlignmentFlag.AlignCenter)
         self.qr_image_label.setStyleSheet("background-color: white; border: 2px solid #ccc; border-radius: 10px;")
         layout.addWidget(self.qr_image_label, alignment=Qt.AlignmentFlag.AlignCenter)
 
         self.qr_url_label = QLabel("")
-        self.qr_url_label.setFont(QFont("", 14))
         self.qr_url_label.setAlignment(Qt.AlignmentFlag.AlignCenter)
         self.qr_url_label.setStyleSheet("color: #666;")
         layout.addWidget(self.qr_url_label)
 
-        hint = QLabel("Envoyez vos photos depuis la page web\nqui s'ouvrira sur votre téléphone")
-        hint.setFont(QFont("", 16))
-        hint.setAlignment(Qt.AlignmentFlag.AlignCenter)
-        hint.setStyleSheet("color: #666;")
-        layout.addWidget(hint)
+        self.qr_hint = QLabel("Envoyez vos photos depuis la page web\nqui s'ouvrira sur votre téléphone")
+        self.qr_hint.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        self.qr_hint.setStyleSheet("color: #666;")
+        layout.addWidget(self.qr_hint)
 
         self.qr_status_label = QLabel("En attente de photos...")
-        self.qr_status_label.setFont(QFont("", 16))
         self.qr_status_label.setAlignment(Qt.AlignmentFlag.AlignCenter)
-        self.qr_status_label.setStyleSheet(INFO_STYLE)
         layout.addWidget(self.qr_status_label)
 
         layout.addStretch()
         return page
 
+    def _style_qr_page(self):
+        self.qr_instruction.setFont(scaled_font(self, Sizes.HEADING))
+        qr_size = scale(self, 35)  # QR = 35% de la hauteur
+        self.qr_image_label.setFixedSize(qr_size, qr_size)
+        self.qr_url_label.setFont(scaled_font(self, Sizes.BODY))
+        self.qr_hint.setFont(scaled_font(self, Sizes.BODY))
+        self.qr_status_label.setFont(scaled_font(self, Sizes.BODY))
+
     # ─── Page 4 : Email ───
 
     def _build_email_page(self):
         page = QWidget()
         layout = QVBoxLayout(page)
-        layout.setSpacing(20)
-
         layout.addLayout(self._make_page_header())
 
-        instruction = QLabel("Envoyez vos photos par email\nà l'adresse suivante :")
-        instruction.setFont(QFont("", 24))
-        instruction.setAlignment(Qt.AlignmentFlag.AlignCenter)
-        layout.addWidget(instruction)
+        self.email_instruction = QLabel("Envoyez vos photos par email\nà l'adresse suivante :")
+        self.email_instruction.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        layout.addWidget(self.email_instruction)
 
         layout.addStretch()
 
-        self.email_address_label = QLabel(self.config["email_address"])
-        self.email_address_label.setFont(QFont("", 28, QFont.Weight.Bold))
+        self.email_address_label = QLabel()
         self.email_address_label.setAlignment(Qt.AlignmentFlag.AlignCenter)
-        self.email_address_label.setStyleSheet(HIGHLIGHT_STYLE)
+        self.email_address_label.setTextInteractionFlags(Qt.TextInteractionFlag.TextSelectableByMouse)
         layout.addWidget(self.email_address_label)
 
-        hint = QLabel("Joignez vos photos en pièce jointe\net envoyez depuis votre téléphone")
-        hint.setFont(QFont("", 16))
-        hint.setAlignment(Qt.AlignmentFlag.AlignCenter)
-        hint.setStyleSheet("color: #666;")
-        layout.addWidget(hint)
+        self.email_hint = QLabel("Joignez vos photos en pièce jointe\net envoyez depuis votre téléphone")
+        self.email_hint.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        self.email_hint.setStyleSheet("color: #666;")
+        layout.addWidget(self.email_hint)
 
         self.email_status_label = QLabel("En attente de réception...")
-        self.email_status_label.setFont(QFont("", 16))
         self.email_status_label.setAlignment(Qt.AlignmentFlag.AlignCenter)
-        self.email_status_label.setStyleSheet(INFO_STYLE)
         layout.addWidget(self.email_status_label)
 
         layout.addStretch()
         return page
 
+    def _style_email_page(self):
+        self.email_instruction.setFont(scaled_font(self, Sizes.HEADING))
+        self.email_address_label.setFont(scaled_font(self, 4.5, bold=True))
+        self.email_address_label.setStyleSheet(highlight_box(self))
+        self.email_hint.setFont(scaled_font(self, Sizes.BODY))
+        self.email_status_label.setFont(scaled_font(self, Sizes.BODY))
+        self._refresh_config_labels()
+
     # ─── Navigation ───
 
     def _show_modes(self):
@@ -373,7 +351,6 @@ class HomeScreen(QWidget):
             self._refresh_config_labels()
 
     def _refresh_config_labels(self):
-        """Met à jour les labels avec la config actuelle."""
         self.config = load_config()
         self.wifi_name_label.setText(f"Nom du réseau :  {self.config['wifi_ap_name']}")
         self.wifi_pass_label.setText(f"Mot de passe :  {self.config['wifi_ap_password']}")
@@ -390,14 +367,14 @@ class HomeScreen(QWidget):
     def _on_usb_inserted(self, mount_path, photos):
         self._usb_mount = mount_path
         self._usb_photos = photos
-        self.mode_buttons["USB"].setStyleSheet(BTN_GREEN)
+        self.mode_buttons["USB"].setStyleSheet(green_btn(self))
         self._update_usb_status()
 
     def _on_usb_removed(self, mount_path):
         if mount_path == self._usb_mount:
             self._usb_mount = None
             self._usb_photos = []
-            self.mode_buttons["USB"].setStyleSheet(BTN_BLUE)
+            self.mode_buttons["USB"].setStyleSheet(blue_btn(self))
             self._update_usb_status()
 
     def _update_usb_status(self):
@@ -406,11 +383,11 @@ class HomeScreen(QWidget):
             self.usb_status_label.setText(
                 f"Clé USB détectée — {count} photo{'s' if count != 1 else ''} trouvée{'s' if count != 1 else ''}"
             )
-            self.usb_status_label.setStyleSheet(SUCCESS_STYLE)
+            self.usb_status_label.setStyleSheet(success_box(self))
             self.usb_continue_btn.show()
         else:
             self.usb_status_label.setText("Clé USB non détectée\nInsérez votre clé USB puis patientez quelques secondes")
-            self.usb_status_label.setStyleSheet(ERROR_STYLE)
+            self.usb_status_label.setStyleSheet(error_box(self))
             self.usb_continue_btn.hide()
 
     def _import_usb(self):
@@ -438,8 +415,10 @@ class HomeScreen(QWidget):
             qimage.loadFromData(buffer.read())
             pixmap = QPixmap.fromImage(qimage)
 
+            qr_size = scale(self, 35)
             self.qr_image_label.setPixmap(
-                pixmap.scaled(230, 230, Qt.AspectRatioMode.KeepAspectRatio,
+                pixmap.scaled(qr_size - 20, qr_size - 20,
+                              Qt.AspectRatioMode.KeepAspectRatio,
                               Qt.TransformationMode.SmoothTransformation)
             )
             self.qr_url_label.setText(upload_url)
diff --git a/src/ui/style.py b/src/ui/style.py
new file mode 100644
index 0000000..8bfc05c
--- /dev/null
+++ b/src/ui/style.py
@@ -0,0 +1,128 @@
+"""Styles et tailles responsive — tout est relatif à la taille de la fenêtre."""
+
+from PyQt6.QtWidgets import QWidget
+from PyQt6.QtGui import QFont
+
+
+def scale(widget: QWidget, base_pct: float) -> int:
+    """Retourne une valeur en pixels proportionnelle à la hauteur de la fenêtre.
+    base_pct = pourcentage de la hauteur (ex: 5.0 = 5% de la hauteur)."""
+    window = widget.window()
+    h = window.height() if window else 768
+    return max(1, int(h * base_pct / 100))
+
+
+def scaled_font(widget: QWidget, pct: float, bold: bool = False) -> QFont:
+    """Crée une QFont dont la taille est proportionnelle à la fenêtre."""
+    size = scale(widget, pct)
+    weight = QFont.Weight.Bold if bold else QFont.Weight.Normal
+    return QFont("", size, weight)
+
+
+# Pourcentages de référence (basés sur hauteur fenêtre)
+class Sizes:
+    TITLE = 7.0          # titre principal
+    SUBTITLE = 3.0       # sous-titre
+    HEADING = 4.0        # titres de page
+    BODY = 2.8           # texte courant
+    BODY_LARGE = 3.5     # texte mis en évidence
+    BUTTON_TEXT = 2.5    # texte des boutons
+    BUTTON_LARGE = 3.0   # gros boutons
+    HINT = 1.8           # texte discret
+    SPACING = 2.5        # espacement standard
+    MARGIN = 2.5         # marges
+    BTN_HEIGHT = 8.0     # hauteur bouton standard
+    BTN_WIDTH = 22.0     # largeur bouton mode (% largeur)
+    BTN_MODE_H = 20.0    # hauteur bouton mode
+    RADIUS = 2.0         # border-radius
+    PADDING = 2.5        # padding boutons
+
+
+def btn_style(widget: QWidget, bg: str, pressed: str) -> str:
+    r = scale(widget, Sizes.RADIUS)
+    p = scale(widget, Sizes.PADDING)
+    fs = scale(widget, Sizes.BUTTON_TEXT)
+    return f"""
+        QPushButton {{
+            background-color: {bg};
+            color: white;
+            border-radius: {r}px;
+            padding: {p}px;
+            font-size: {fs}px;
+        }}
+        QPushButton:pressed {{
+            background-color: {pressed};
+        }}
+    """
+
+
+def blue_btn(widget: QWidget) -> str:
+    return btn_style(widget, "#2196F3", "#1976D2")
+
+
+def green_btn(widget: QWidget) -> str:
+    return btn_style(widget, "#4CAF50", "#388E3C")
+
+
+def back_btn_style(widget: QWidget) -> str:
+    r = scale(widget, Sizes.RADIUS)
+    p = scale(widget, Sizes.PADDING)
+    fs = scale(widget, Sizes.BUTTON_TEXT)
+    return f"""
+        QPushButton {{
+            background-color: #757575;
+            color: white;
+            border-radius: {r}px;
+            padding: {p}px {int(p*1.5)}px;
+            font-size: {fs}px;
+        }}
+        QPushButton:pressed {{ background-color: #616161; }}
+    """
+
+
+def highlight_box(widget: QWidget) -> str:
+    r = scale(widget, Sizes.RADIUS)
+    p = scale(widget, Sizes.PADDING)
+    fs = scale(widget, Sizes.BODY_LARGE)
+    return f"""
+        QLabel {{
+            background-color: #E3F2FD;
+            border: 2px solid #2196F3;
+            border-radius: {r}px;
+            padding: {p}px;
+            color: #1565C0;
+            font-size: {fs}px;
+        }}
+    """
+
+
+def error_box(widget: QWidget) -> str:
+    r = scale(widget, Sizes.RADIUS)
+    p = scale(widget, Sizes.PADDING)
+    fs = scale(widget, Sizes.BODY)
+    return f"""
+        QLabel {{
+            background-color: #FFEBEE;
+            border: 2px solid #F44336;
+            border-radius: {r}px;
+            padding: {p}px;
+            color: #C62828;
+            font-size: {fs}px;
+        }}
+    """
+
+
+def success_box(widget: QWidget) -> str:
+    r = scale(widget, Sizes.RADIUS)
+    p = scale(widget, Sizes.PADDING)
+    fs = scale(widget, Sizes.BODY)
+    return f"""
+        QLabel {{
+            background-color: #E8F5E9;
+            border: 2px solid #4CAF50;
+            border-radius: {r}px;
+            padding: {p}px;
+            color: #2E7D32;
+            font-size: {fs}px;
+        }}
+    """