ShiftRing/app/src/main/res/layout/activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/bg_mesh_gradient"
    android:padding="0dp">

    <!-- Compact Header Section -->
    <androidx.constraintlayout.widget.ConstraintLayout
        android:id="@+id/headerRoot"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingTop="12dp"
        android:paddingBottom="8dp"
        android:paddingHorizontal="20dp"
        app:layout_constraintTop_toTopOf="parent">

        <TextView
            android:id="@+id/appTitle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/app_name"
            android:textSize="24sp"
            android:textStyle="bold"
            android:textColor="@color/text_primary"
            android:letterSpacing="-0.03"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"/>

        <TextView
            android:id="@+id/todayStatusText"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="오늘의 근무"
            android:textSize="13sp"
            android:textColor="@color/text_secondary"
            android:fontFamily="sans-serif-medium"
            android:layout_marginStart="12dp"
            app:layout_constraintStart_toEndOf="@id/appTitle"
            app:layout_constraintTop_toTopOf="@id/appTitle"
            app:layout_constraintBottom_toBottomOf="@id/appTitle"
            app:layout_constraintEnd_toStartOf="@id/btnSettings"/>

        <ImageButton
            android:id="@+id/btnSettings"
            android:layout_width="40dp"
            android:layout_height="40dp"
            android:src="@drawable/ic_settings"
            android:background="?attr/selectableItemBackgroundBorderless"
            app:tint="@color/text_primary"
            android:padding="8dp"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintTop_toTopOf="@id/appTitle"
            app:layout_constraintBottom_toBottomOf="@id/appTitle" />

    </androidx.constraintlayout.widget.ConstraintLayout>

    <!-- Maximized Calendar Card - Reduced margins for wider calendar -->
    <androidx.cardview.widget.CardView
        android:id="@+id/calendarCard"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginHorizontal="4dp"
        android:layout_marginBottom="8dp"
        app:cardCornerRadius="28dp"
        app:cardElevation="0dp"
        app:cardBackgroundColor="@android:color/transparent"
        app:layout_constraintTop_toBottomOf="@id/headerRoot"
        app:layout_constraintBottom_toTopOf="@id/otherTeamsCard"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent">

        <androidx.constraintlayout.widget.ConstraintLayout
            android:id="@+id/calendarContainer"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@drawable/bg_glass_panel_v3">

            <!-- Compact Month Controls -->
            <LinearLayout
                android:id="@+id/monthControlBar"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="horizontal"
                android:gravity="center"
                android:paddingVertical="4dp"
                android:paddingHorizontal="16dp"
                app:layout_constraintTop_toTopOf="parent">

                <androidx.appcompat.widget.AppCompatButton
                    android:id="@+id/prevMonth"
                    android:layout_width="44dp"
                    android:layout_height="44dp"
                    android:text="&lt;"
                    android:textColor="@color/text_primary"
                    android:textSize="18sp"
                    android:background="?attr/selectableItemBackgroundBorderless"
                    style="@style/Widget.Material3.Button.TextButton"/>

                <TextView
                    android:id="@+id/monthTitle"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_weight="1"
                    android:text="2026.02"
                    android:textSize="20sp"
                    android:textStyle="bold"
                    android:gravity="center"
                    android:textColor="@color/text_primary"
                    android:letterSpacing="-0.02"/>

                <androidx.appcompat.widget.AppCompatButton
                    android:id="@+id/btnToday"
                    android:layout_width="56dp"
                    android:layout_height="28dp"
                    android:text="오늘"
                    android:textSize="12sp"
                    android:textStyle="bold"
                    android:textColor="@color/primary"
                    android:background="@drawable/bg_button_one_ui"
                    android:padding="0dp"
                    android:minWidth="0dp"
                    android:minHeight="0dp"
                    style="@style/Widget.Material3.Button.TextButton"/>

                <androidx.appcompat.widget.AppCompatButton
                    android:id="@+id/nextMonth"
                    android:layout_width="44dp"
                    android:layout_height="44dp"
                    android:text="&gt;"
                    android:textColor="@color/text_primary"
                    android:textSize="18sp"
                    android:background="?attr/selectableItemBackgroundBorderless"
                    style="@style/Widget.Material3.Button.TextButton"/>
            </LinearLayout>

            <!-- Compact Alarm Info Bar -->
            <androidx.constraintlayout.widget.ConstraintLayout
                android:id="@+id/alarmInfoBar"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginHorizontal="16dp"
                android:paddingHorizontal="12dp"
                android:paddingVertical="4dp"
                android:clickable="true"
                android:focusable="true"
                app:layout_constraintTop_toBottomOf="@id/monthControlBar">

                <TextView
                    android:id="@+id/alarmTimeText"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:text="내 알람: 07:00"
                    android:textSize="12sp"
                    android:textStyle="bold"
                    android:textColor="@color/text_secondary"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="parent"
                    app:layout_constraintBottom_toBottomOf="parent"
                    app:layout_constraintEnd_toStartOf="@id/tvAnnualLeave"/>

                <TextView
                    android:id="@+id/tvAnnualLeave"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="연차: 0.0"
                    android:textSize="12sp"
                    android:textStyle="bold"
                    android:textColor="@color/primary"
                    android:layout_marginEnd="8dp"
                    app:layout_constraintEnd_toStartOf="@id/btnTideLocation"
                    app:layout_constraintTop_toTopOf="parent"
                    app:layout_constraintBottom_toBottomOf="parent"/>

                <androidx.appcompat.widget.AppCompatButton
                    android:id="@+id/btnTideLocation"
                    android:layout_width="wrap_content"
                    android:layout_height="24dp"
                    android:text="군산"
                    android:textSize="10sp"
                    android:textColor="@color/primary"
                    android:background="@drawable/bg_button_one_ui"
                    android:visibility="gone"
                    android:paddingHorizontal="8dp"
                    android:minWidth="0dp"
                    android:minHeight="0dp"
                    android:layout_marginEnd="8dp"
                    app:layout_constraintEnd_toStartOf="@id/cbShowHolidays"
                    app:layout_constraintTop_toTopOf="parent"
                    app:layout_constraintBottom_toBottomOf="parent"/>

                <CheckBox
                    android:id="@+id/cbShowHolidays"
                    android:layout_width="wrap_content"
                    android:layout_height="24dp"
                    android:text="공휴일"
                    android:checked="false"
                    android:textSize="11sp"
                    android:textColor="@color/text_primary"
                    android:buttonTint="@color/primary"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintTop_toTopOf="parent"
                    app:layout_constraintBottom_toBottomOf="parent"/>
            </androidx.constraintlayout.widget.ConstraintLayout>

            <!-- Weekday Labels Header -->
            <LinearLayout
                android:id="@+id/weekdayLabels"
                android:layout_width="match_parent"
                android:layout_height="28dp"
                android:orientation="horizontal"
                android:layout_marginTop="8dp"
                android:background="#08000000"
                app:layout_constraintTop_toBottomOf="@id/alarmInfoBar">
                <TextView android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:text="일" android:gravity="center" android:textColor="@color/shift_red" android:textSize="11sp" android:textStyle="bold"/>
                <TextView android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:text="월" android:gravity="center" android:textColor="@color/text_secondary" android:textSize="11sp" android:textStyle="bold"/>
                <TextView android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:text="화" android:gravity="center" android:textColor="@color/text_secondary" android:textSize="11sp" android:textStyle="bold"/>
                <TextView android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:text="수" android:gravity="center" android:textColor="@color/text_secondary" android:textSize="11sp" android:textStyle="bold"/>
                <TextView android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:text="목" android:gravity="center" android:textColor="@color/text_secondary" android:textSize="11sp" android:textStyle="bold"/>
                <TextView android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:text="금" android:gravity="center" android:textColor="@color/text_secondary" android:textSize="11sp" android:textStyle="bold"/>
                <TextView android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:text="토" android:gravity="center" android:textColor="@color/primary" android:textSize="11sp" android:textStyle="bold"/>
            </LinearLayout>

            <androidx.recyclerview.widget.RecyclerView
                android:id="@+id/calendarGrid"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:overScrollMode="never"
                app:layout_constraintTop_toBottomOf="@id/weekdayLabels"
                app:layout_constraintBottom_toBottomOf="parent" />
                
        </androidx.constraintlayout.widget.ConstraintLayout>
    </androidx.cardview.widget.CardView>
    
    <!-- Other Teams Compact Section -->
    <androidx.cardview.widget.CardView
        android:id="@+id/otherTeamsCard"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginHorizontal="4dp"
        android:layout_marginBottom="16dp"
        app:cardCornerRadius="20dp"
        app:cardElevation="0dp"
        app:cardBackgroundColor="@android:color/transparent"
        app:layout_constraintBottom_toBottomOf="parent">
        
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            android:background="@drawable/bg_glass_panel_v3"
            android:paddingHorizontal="16dp"
            android:paddingVertical="10dp">
            
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="다른 반 근무"
                android:textSize="13sp"
                android:textColor="@color/text_primary"
                android:textStyle="bold"
                android:layout_marginBottom="8dp"
                android:letterSpacing="-0.01"/>
    
            <LinearLayout
                android:id="@+id/otherTeamsContainer"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="horizontal"
                android:gravity="center"/>
        </LinearLayout>
    </androidx.cardview.widget.CardView>

</androidx.constraintlayout.widget.ConstraintLayout>